/* roulang page: index */
:root {
            --bg-deep: #050A14;
            --bg-surface: #0A1224;
            --bg-card: rgba(15, 25, 45, 0.52);
            --bg-card-hover: rgba(18, 32, 58, 0.68);
            --bg-glass: rgba(15, 25, 45, 0.45);
            --primary: #2E77FF;
            --primary-bright: #38BDF8;
            --accent-cyan: #22D3EE;
            --accent-amber: #F59E0B;
            --accent-red: #F43F5E;
            --text-main: #E6F1FF;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border-light: rgba(255, 255, 255, 0.08);
            --border-focus: rgba(56, 189, 248, 0.55);
            --radius-card: 18px;
            --radius-btn: 11px;
            --radius-img: 14px;
            --shadow-card: 0 20px 50px rgba(0, 0, 0, 0.35);
            --shadow-float: 0 8px 24px rgba(0, 0, 0, 0.25);
            --shadow-glow: 0 0 18px rgba(56, 189, 248, 0.45);
            --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'HarmonyOS Sans SC', 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'system-ui', -apple-system, sans-serif;
            --font-num: 'Inter', 'Roboto', 'system-ui', sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background-color: var(--bg-deep);
            background-image:
                radial-gradient(ellipse at 18% -10%, rgba(46, 119, 255, 0.18) 0%, transparent 52%),
                radial-gradient(ellipse at 88% 8%, rgba(56, 189, 248, 0.10) 0%, transparent 45%),
                radial-gradient(ellipse at 50% 115%, rgba(34, 211, 238, 0.06) 0%, transparent 40%);
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--primary-bright);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-cyan);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 22px;
            padding-right: 22px;
        }

        .section {
            padding: 72px 0;
            position: relative;
        }
        .section--tight {
            padding: 48px 0;
        }
        .section--alt {
            background-color: rgba(8, 16, 34, 0.55);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .section-label {
            display: inline-block;
            font-size: 12px;
            letter-spacing: 2.5px;
            text-transform: uppercase;
            color: var(--accent-cyan);
            background: rgba(34, 211, 238, 0.08);
            border: 1px solid rgba(34, 211, 238, 0.18);
            padding: 5px 14px;
            border-radius: 30px;
            margin-bottom: 14px;
            font-weight: 600;
        }

        .section-title {
            font-family: var(--font-heading);
            font-size: 30px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-main);
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 820px;
        }

        /* 导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(5, 10, 20, 0.82);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            height: auto;
            min-height: 68px;
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            width: 100%;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-size: 22px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.02em;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-bright));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 19px;
            color: #FFF;
            box-shadow: 0 0 16px rgba(56, 189, 248, 0.4);
            flex-shrink: 0;
        }
        .nav-logo span {
            background: linear-gradient(135deg, #FFFFFF 60%, #B8D8FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 2px;
            list-style: none;
            margin: 0;
            flex: 1;
            justify-content: center;
            flex-wrap: wrap;
        }
        .nav-menu>li {
            position: relative;
        }
        .nav-menu>li>a {
            display: block;
            padding: 8px 14px;
            font-size: 14.5px;
            color: var(--text-secondary);
            border-radius: 8px;
            font-weight: 500;
            transition: all var(--transition);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .nav-menu>li>a:hover {
            color: #FFFFFF;
            background: rgba(255, 255, 255, 0.05);
        }
        .nav-menu>li.active>a {
            color: #FFFFFF;
            background: rgba(56, 189, 248, 0.12);
            box-shadow: inset 0 -2px 0 var(--accent-cyan);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 10px;
            padding: 6px 12px;
            gap: 8px;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .nav-search:focus-within {
            border-color: var(--primary-bright);
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.12);
        }
        .nav-search i {
            color: var(--text-muted);
            font-size: 13px;
        }
        .nav-search input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-main);
            font-size: 13.5px;
            width: 140px;
            padding: 2px 0;
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 7px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 14.5px;
            cursor: pointer;
            border: none;
            transition: all var(--transition);
            letter-spacing: 0.01em;
            text-decoration: none;
            line-height: 1.4;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(56, 189, 248, 0.55);
            outline-offset: 2px;
        }
        .btn:active {
            transform: scale(0.97);
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-bright));
            color: #FFFFFF;
            box-shadow: var(--shadow-glow);
        }
        .btn-primary:hover {
            color: #FFFFFF;
            background: linear-gradient(135deg, #3D86FF, #4DC6F8);
            box-shadow: 0 0 26px rgba(56, 189, 248, 0.6);
            transform: translateY(-2px);
        }
        .btn-ghost {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.16);
            color: var(--text-main);
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(56, 189, 248, 0.45);
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        }
        .btn-sm {
            padding: 7px 15px;
            font-size: 13px;
            border-radius: 8px;
        }
        .btn-lg {
            padding: 13px 30px;
            font-size: 16px;
            border-radius: 12px;
        }
        .btn-outline-glow {
            background: transparent;
            border: 1px solid rgba(56, 189, 248, 0.5);
            color: var(--primary-bright);
            box-shadow: 0 0 10px rgba(56, 189, 248, 0.2);
        }
        .btn-outline-glow:hover {
            background: rgba(56, 189, 248, 0.08);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(56, 189, 248, 0.35);
            transform: translateY(-2px);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 8px;
            padding: 8px 12px;
            cursor: pointer;
            color: var(--text-main);
            font-size: 18px;
            transition: all var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(56, 189, 248, 0.4);
        }

        /* 移动端抽屉 */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: -100%;
            width: 85%;
            max-width: 380px;
            height: 100vh;
            background: rgba(6, 12, 24, 0.96);
            backdrop-filter: blur(28px);
            -webkit-backdrop-filter: blur(28px);
            z-index: 2000;
            transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: -20px 0 60px rgba(0, 0, 0, 0.5);
            border-left: 1px solid rgba(255, 255, 255, 0.06);
            padding: 24px 20px 40px;
            overflow-y: auto;
        }
        .mobile-drawer.open {
            right: 0;
        }
        .drawer-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 1900;
            backdrop-filter: blur(4px);
        }
        .drawer-overlay.show {
            display: block;
        }
        .drawer-close {
            background: transparent;
            border: none;
            color: var(--text-main);
            font-size: 24px;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: background var(--transition);
        }
        .drawer-close:hover {
            background: rgba(255, 255, 255, 0.06);
        }
        .drawer-nav {
            list-style: none;
            margin: 20px 0 0;
        }
        .drawer-nav li a {
            display: block;
            padding: 14px 10px;
            font-size: 17px;
            color: var(--text-main);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            font-weight: 500;
            transition: color var(--transition), background var(--transition);
            border-radius: 8px;
        }
        .drawer-nav li a:hover,
        .drawer-nav li.active a {
            color: var(--accent-cyan);
            background: rgba(56, 189, 248, 0.06);
        }
        .drawer-actions {
            margin-top: 22px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        /* Hero */
        .hero {
            position: relative;
            padding: 72px 0 90px;
            background-image:
                linear-gradient(180deg, rgba(5, 10, 20, 0.35) 0%, rgba(5, 10, 20, 0.7) 100%),
                url('/assets/images/0212d898ffc22bd0.webp');
            background-size: cover;
            background-position: center center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(circle at 25% 30%, rgba(46, 119, 255, 0.2) 0%, transparent 45%),
                radial-gradient(circle at 75% 20%, rgba(34, 211, 238, 0.1) 0%, transparent 40%);
            pointer-events: none;
        }
        .hero .container {
            position: relative;
            z-index: 1;
        }
        .hero-inner {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 42px;
            align-items: center;
            min-height: 480px;
        }
        .hero-badge-row {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 18px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: 30px;
            font-size: 12.5px;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: var(--text-secondary);
        }
        .hero-badge i {
            color: var(--accent-cyan);
            font-size: 11px;
        }
        .hero h1 {
            font-family: var(--font-heading);
            font-size: 42px;
            font-weight: 700;
            line-height: 1.25;
            color: #FFFFFF;
            margin-bottom: 18px;
            letter-spacing: -0.02em;
        }
        .hero h1 em {
            font-style: normal;
            background: linear-gradient(135deg, var(--primary-bright), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-subtitle {
            font-size: 16.5px;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 24px;
            max-width: 560px;
        }
        .hero-check-list {
            list-style: none;
            margin: 0 0 26px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px 18px;
            max-width: 520px;
        }
        .hero-check-list li {
            display: flex;
            align-items: center;
            gap: 9px;
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .hero-check-list li i {
            color: var(--accent-cyan);
            font-size: 13px;
            flex-shrink: 0;
        }
        .hero-cta-row {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
        }
        .hero-panel {
            background: var(--bg-card);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 22px;
            padding: 30px 26px;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
            gap: 18px;
        }
        .hero-panel-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-bottom: 14px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.07);
        }
        .hero-panel-header h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin: 0;
        }
        .hero-panel-header .live-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #22D3EE;
            box-shadow: 0 0 8px #22D3EE;
            animation: pulse-dot 1.8s infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.35; }
        }
        .hero-stat-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
        }
        .hero-stat-item {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: 14px;
            padding: 16px;
            text-align: center;
        }
        .hero-stat-item .num {
            font-family: var(--font-num);
            font-size: 26px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: -0.02em;
            display: block;
            line-height: 1.2;
        }
        .hero-stat-item .label {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 5px;
        }
        .hero-trust-badge {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            padding: 10px 12px;
            background: rgba(34, 211, 238, 0.05);
            border: 1px solid rgba(34, 211, 238, 0.12);
            border-radius: 10px;
        }
        .hero-trust-badge i {
            color: var(--accent-cyan);
        }

        /* 数据带 */
        .data-band {
            margin-top: -56px;
            position: relative;
            z-index: 5;
            padding-bottom: 20px;
        }
        .data-band-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .data-band-card {
            background: var(--bg-glass);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 20px 18px;
            text-align: center;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
            transition: all var(--transition);
        }
        .data-band-card:hover {
            transform: translateY(-3px);
            border-color: rgba(56, 189, 248, 0.3);
            box-shadow: 0 14px 34px rgba(0, 0, 0, 0.35);
        }
        .data-band-card .num {
            font-family: var(--font-num);
            font-size: 30px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: -0.02em;
            display: block;
            line-height: 1.15;
        }
        .data-band-card .label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* 功能卡片 */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .feature-card {
            background: var(--bg-card);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 26px 22px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            border-color: rgba(56, 189, 248, 0.3);
            box-shadow: 0 24px 56px rgba(0, 0, 0, 0.4);
            background: var(--bg-card-hover);
        }
        .feature-card .fc-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            background: linear-gradient(135deg, rgba(46, 119, 255, 0.18), rgba(56, 189, 248, 0.1));
            border: 1px solid rgba(56, 189, 248, 0.2);
            color: var(--primary-bright);
            margin-bottom: 4px;
        }
        .feature-card .fc-no {
            font-family: var(--font-num);
            font-size: 12px;
            color: var(--accent-cyan);
            font-weight: 600;
            letter-spacing: 1px;
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0;
            letter-spacing: -0.01em;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0;
        }

        /* 使用场景 */
        .scenario-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 22px;
        }
        .scenario-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 24px 22px;
            display: flex;
            gap: 18px;
            align-items: flex-start;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
        }
        .scenario-item:hover {
            transform: translateY(-3px);
            border-color: rgba(56, 189, 248, 0.25);
            box-shadow: 0 20px 46px rgba(0, 0, 0, 0.38);
        }
        .scenario-item .si-step {
            width: 42px;
            height: 42px;
            min-width: 42px;
            border-radius: 50%;
            background: rgba(56, 189, 248, 0.1);
            border: 1px solid rgba(56, 189, 248, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-num);
            font-size: 17px;
            font-weight: 700;
            color: var(--accent-cyan);
        }
        .scenario-item h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 6px;
        }
        .scenario-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0;
        }

        /* 截图演示 */
        .demo-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            align-items: stretch;
        }
        .demo-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 18px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
        }
        .demo-card:hover {
            transform: translateY(-3px);
            border-color: rgba(56, 189, 248, 0.3);
            box-shadow: 0 22px 50px rgba(0, 0, 0, 0.4);
        }
        .demo-card img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            margin-bottom: 14px;
            border-radius: 12px;
        }
        .demo-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 6px;
        }
        .demo-card p {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* 案例 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }
        .case-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 24px 22px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .case-card:hover {
            transform: translateY(-4px);
            border-color: rgba(56, 189, 248, 0.3);
            box-shadow: 0 24px 54px rgba(0, 0, 0, 0.42);
        }
        .case-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            background: rgba(34, 211, 238, 0.08);
            border: 1px solid rgba(34, 211, 238, 0.2);
            color: var(--accent-cyan);
            letter-spacing: 0.5px;
            align-self: flex-start;
        }
        .case-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0;
        }
        .case-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0;
        }
        .case-card .case-result {
            font-size: 13px;
            color: var(--accent-amber);
            font-weight: 600;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 12px;
            margin-top: auto;
        }

        /* 深度内容 */
        .deep-content {
            background: var(--bg-glass);
            border: 1px solid var(--border-light);
            border-radius: 20px;
            padding: 36px 32px;
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
        }
        .deep-content h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 16px;
            letter-spacing: -0.01em;
        }
        .deep-content p {
            font-size: 15.5px;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 18px;
        }
        .deep-content p:last-child {
            margin-bottom: 0;
        }
        .deep-content .highlight {
            color: var(--primary-bright);
            font-weight: 500;
        }

        /* 价格 */
        .price-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
            align-items: stretch;
        }
        .price-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: 20px;
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 14px;
            position: relative;
        }
        .price-card:hover {
            transform: translateY(-4px);
            border-color: rgba(56, 189, 248, 0.3);
            box-shadow: 0 24px 54px rgba(0, 0, 0, 0.42);
        }
        .price-card.recommended {
            border-color: rgba(56, 189, 248, 0.5);
            box-shadow: 0 0 30px rgba(56, 189, 248, 0.25), var(--shadow-card);
        }
        .price-card .rec-badge {
            position: absolute;
            top: -12px;
            right: 22px;
            background: linear-gradient(135deg, var(--primary), var(--primary-bright));
            color: #FFF;
            font-size: 11.5px;
            font-weight: 700;
            padding: 4px 13px;
            border-radius: 20px;
            letter-spacing: 0.5px;
            box-shadow: 0 0 14px rgba(56, 189, 248, 0.5);
        }
        .price-card .plan-name {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
        }
        .price-card .plan-price {
            font-family: var(--font-num);
            font-size: 34px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: -0.02em;
        }
        .price-card .plan-price small {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 400;
        }
        .price-card ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }
        .price-card ul li {
            font-size: 13.5px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .price-card ul li i {
            color: var(--accent-cyan);
            font-size: 12px;
            flex-shrink: 0;
        }
        .price-card .btn {
            margin-top: 4px;
        }

        /* 评价墙 */
        .review-wall {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }
        .review-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 20px 18px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .review-card:hover {
            transform: translateY(-3px);
            border-color: rgba(56, 189, 248, 0.25);
            box-shadow: 0 18px 44px rgba(0, 0, 0, 0.38);
        }
        .review-stars {
            display: flex;
            gap: 3px;
            color: var(--accent-amber);
            font-size: 13px;
        }
        .review-card .review-text {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        .review-card .review-author {
            font-size: 12.5px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 用户口碑 */
        .testimonial-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 22px;
        }
        .testimonial-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 26px 24px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
        }
        .testimonial-card:hover {
            transform: translateY(-3px);
            border-color: rgba(56, 189, 248, 0.25);
            box-shadow: 0 20px 48px rgba(0, 0, 0, 0.4);
        }
        .testimonial-card .quote-mark {
            font-size: 36px;
            color: rgba(56, 189, 248, 0.35);
            line-height: 1;
            margin-bottom: 8px;
            font-family: Georgia, serif;
        }
        .testimonial-card p {
            font-size: 14.5px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0 0 14px;
        }
        .testimonial-card .tm-author {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 600;
        }

        /* 新闻 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 16px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .news-card:hover {
            transform: translateY(-4px);
            border-color: rgba(56, 189, 248, 0.3);
            box-shadow: 0 22px 50px rgba(0, 0, 0, 0.42);
        }
        .news-card img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            border-radius: 10px;
            margin-bottom: 4px;
        }
        .news-card .news-date {
            font-size: 12px;
            color: var(--text-muted);
            font-weight: 500;
            letter-spacing: 0.5px;
        }
        .news-card h3 {
            font-size: 15.5px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0;
            line-height: 1.5;
            letter-spacing: -0.01em;
        }
        .news-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        .news-card .btn {
            align-self: flex-start;
            margin-top: auto;
        }

        /* 品牌介绍 */
        .brand-intro {
            background: var(--bg-glass);
            border: 1px solid var(--border-light);
            border-radius: 20px;
            padding: 32px 30px;
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            text-align: center;
        }
        .brand-intro p {
            font-size: 15.5px;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 860px;
            margin: 0 auto;
        }
        .brand-intro .brand-name {
            color: var(--primary-bright);
            font-weight: 600;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-float);
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(56, 189, 248, 0.25);
        }
        .faq-q {
            width: 100%;
            background: transparent;
            border: none;
            padding: 18px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            cursor: pointer;
            color: var(--text-main);
            font-size: 15.5px;
            font-weight: 600;
            text-align: left;
            transition: color var(--transition);
            letter-spacing: 0.01em;
        }
        .faq-q:hover {
            color: var(--accent-cyan);
        }
        .faq-q .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid rgba(56, 189, 248, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: var(--accent-cyan);
            transition: transform var(--transition);
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            padding: 0 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .faq-item.open .faq-a {
            max-height: 400px;
            padding-bottom: 18px;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, rgba(46, 119, 255, 0.14) 0%, rgba(34, 211, 238, 0.06) 50%, rgba(5, 10, 20, 0.3) 100%);
            border: 1px solid rgba(56, 189, 248, 0.18);
            border-radius: 24px;
            padding: 48px 36px;
            text-align: center;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 50% -30%, rgba(56, 189, 248, 0.18) 0%, transparent 55%);
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 28px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .cta-section p {
            font-size: 15.5px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 20px;
            max-width: 620px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-form {
            display: flex;
            align-items: center;
            gap: 12px;
            max-width: 500px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }
        .cta-form input {
            flex: 1;
            min-width: 220px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-btn);
            padding: 11px 16px;
            color: var(--text-main);
            outline: none;
            font-size: 14px;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .cta-form input::placeholder {
            color: var(--text-muted);
        }
        .cta-form input:focus {
            border-color: var(--primary-bright);
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
        }

        /* 页脚 */
        .site-footer {
            background: rgba(6, 12, 24, 0.88);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 52px 0 32px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        .footer-brand .nav-logo {
            margin-bottom: 12px;
            font-size: 19px;
        }
        .footer-brand p {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.75;
            margin: 0;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul li a {
            font-size: 13.5px;
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 22px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 12.5px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-secondary);
            font-size: 12.5px;
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom .sep {
            margin: 0 8px;
            color: var(--text-muted);
            opacity: 0.5;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 30px;
                min-height: auto;
            }
            .hero h1 {
                font-size: 34px;
            }
            .hero-panel {
                max-width: 100%;
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .case-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .price-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .review-wall {
                grid-template-columns: repeat(2, 1fr);
            }
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1.4fr 1fr 1fr;
            }
            .data-band-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
            }
            .nav-actions {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .mobile-drawer {
                display: block;
            }
            .hero {
                padding: 48px 0 70px;
            }
            .hero h1 {
                font-size: 30px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-check-list {
                grid-template-columns: 1fr;
                max-width: 100%;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 25px;
            }
            .feature-grid,
            .case-grid,
            .news-grid,
            .price-grid,
            .review-wall,
            .scenario-list,
            .demo-grid,
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .data-band-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .deep-content {
                padding: 24px 18px;
            }
            .brand-intro {
                padding: 24px 18px;
            }
            .cta-section {
                padding: 32px 20px;
            }
            .cta-section h2 {
                font-size: 23px;
            }
            .section-subtitle {
                font-size: 14.5px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero h1 {
                font-size: 26px;
            }
            .hero-subtitle {
                font-size: 14px;
            }
            .data-band-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .data-band-card .num {
                font-size: 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 22px;
            }
            .btn-lg {
                padding: 11px 20px;
                font-size: 14.5px;
            }
            .hero-cta-row {
                flex-direction: column;
                align-items: flex-start;
            }
            .hero-cta-row .btn {
                width: 100%;
                justify-content: center;
            }
            .cta-form {
                flex-direction: column;
            }
            .cta-form input {
                width: 100%;
                min-width: auto;
            }
            .cta-form .btn {
                width: 100%;
            }
            .nav-logo {
                font-size: 18px;
            }
            .nav-logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-deep: #050A14;
            --bg-surface: #0A1224;
            --bg-card: rgba(15, 25, 45, 0.52);
            --bg-card-hover: rgba(18, 32, 58, 0.68);
            --bg-glass: rgba(15, 25, 45, 0.45);
            --primary: #2E77FF;
            --primary-bright: #38BDF8;
            --accent-cyan: #22D3EE;
            --accent-amber: #F59E0B;
            --accent-red: #F43F5E;
            --text-main: #E6F1FF;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border-light: rgba(255, 255, 255, 0.08);
            --border-focus: rgba(56, 189, 248, 0.55);
            --radius-card: 18px;
            --radius-btn: 11px;
            --radius-img: 14px;
            --shadow-card: 0 20px 50px rgba(0, 0, 0, 0.35);
            --shadow-float: 0 8px 24px rgba(0, 0, 0, 0.25);
            --shadow-glow: 0 0 18px rgba(56, 189, 248, 0.45);
            --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'HarmonyOS Sans SC', 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'system-ui', -apple-system, sans-serif;
            --font-num: 'Inter', 'Roboto', 'system-ui', sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background-color: var(--bg-deep);
            background-image:
                radial-gradient(ellipse at 18% -10%, rgba(46, 119, 255, 0.18) 0%, transparent 52%),
                radial-gradient(ellipse at 88% 8%, rgba(56, 189, 248, 0.10) 0%, transparent 45%),
                radial-gradient(ellipse at 50% 115%, rgba(34, 211, 238, 0.06) 0%, transparent 40%);
            min-height: 100vh;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }
        a {
            color: var(--primary-bright);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 22px;
            padding-right: 22px;
        }
        .section {
            padding: 72px 0;
            position: relative;
        }
        .section--tight {
            padding: 48px 0;
        }
        .section--alt {
            background-color: rgba(8, 16, 34, 0.55);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }
        .section-label {
            display: inline-block;
            font-size: 12px;
            letter-spacing: 2.5px;
            text-transform: uppercase;
            color: var(--accent-cyan);
            background: rgba(34, 211, 238, 0.08);
            border: 1px solid rgba(34, 211, 238, 0.18);
            padding: 5px 14px;
            border-radius: 30px;
            margin-bottom: 14px;
            font-weight: 600;
        }
        .section-title {
            font-family: var(--font-heading);
            font-size: 30px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-main);
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 820px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(5, 10, 20, 0.82);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            min-height: 68px;
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            width: 100%;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-size: 22px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.02em;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-bright));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 19px;
            color: #FFF;
            box-shadow: 0 0 16px rgba(56, 189, 248, 0.4);
            flex-shrink: 0;
        }
        .nav-logo span {
            background: linear-gradient(135deg, #FFFFFF 60%, #B8D8FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 2px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu li {
            margin: 0;
        }
        .nav-menu a {
            display: block;
            padding: 8px 16px;
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
            border-radius: 8px;
            position: relative;
            transition: color var(--transition), background var(--transition);
            white-space: nowrap;
        }
        .nav-menu a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.05);
        }
        .nav-menu li.active a {
            color: #fff;
            background: rgba(56, 189, 248, 0.12);
        }
        .nav-menu li.active a::after {
            content: "";
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent-cyan));
            box-shadow: 0 0 10px rgba(56, 189, 248, 0.5);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 10px;
            padding: 7px 14px;
            min-width: 200px;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .nav-search i {
            color: var(--text-muted);
            font-size: 13px;
        }
        .nav-search input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-main);
            font-size: 13px;
            width: 100%;
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }
        .nav-search:focus-within {
            border-color: var(--border-focus);
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.12);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-btn);
            padding: 10px 22px;
            font-weight: 600;
            font-size: 14px;
            line-height: 1.4;
            border: 1px solid transparent;
            cursor: pointer;
            text-decoration: none;
            transition: all var(--transition);
            white-space: nowrap;
            font-family: var(--font-body);
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-bright));
            color: #fff;
            box-shadow: var(--shadow-glow);
        }
        .btn-primary:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 0 26px rgba(56, 189, 248, 0.65);
            background: linear-gradient(135deg, #3A83FF, #4DC3FA);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(56, 189, 248, 0.4);
        }
        .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.16);
            color: var(--text-main);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(56, 189, 248, 0.4);
            color: #fff;
            box-shadow: var(--shadow-float);
            transform: translateY(-2px);
        }
        .btn-secondary:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }
        .btn-sm {
            padding: 7px 16px;
            font-size: 13px;
            border-radius: 9px;
        }
        .btn-lg {
            padding: 13px 32px;
            font-size: 16px;
            border-radius: 12px;
        }
        .nav-toggle {
            display: none;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: var(--text-main);
            border-radius: 9px;
            padding: 8px 12px;
            cursor: pointer;
            font-size: 16px;
            flex-shrink: 0;
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
        }
        .breadcrumb {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 18px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--accent-cyan);
        }
        .breadcrumb .sep {
            color: var(--text-muted);
        }
        .page-hero {
            padding: 50px 0 28px;
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            top: -30%;
            left: -10%;
            width: 50%;
            height: 160%;
            background: radial-gradient(ellipse, rgba(46, 119, 255, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
        }
        .page-hero h1 {
            font-family: var(--font-heading);
            font-size: 40px;
            font-weight: 700;
            line-height: 1.3;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }
        .page-hero .hero-summary {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 780px;
        }
        .filter-bar {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            padding: 16px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            margin-bottom: 36px;
        }
        .filter-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 16px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .filter-tag:hover {
            color: #fff;
            border-color: rgba(56, 189, 248, 0.4);
            background: rgba(56, 189, 248, 0.1);
        }
        .filter-tag.is-active {
            color: #fff;
            background: rgba(56, 189, 248, 0.18);
            border-color: rgba(56, 189, 248, 0.55);
            box-shadow: 0 0 12px rgba(56, 189, 248, 0.25);
        }
        .filter-select {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: var(--text-main);
            border-radius: 8px;
            padding: 7px 12px;
            font-size: 13px;
            cursor: pointer;
            outline: none;
            transition: border-color var(--transition);
        }
        .filter-select:focus {
            border-color: var(--border-focus);
        }
        .tool-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 22px;
        }
        .tool-card {
            background: var(--bg-card);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .tool-card:hover {
            border-color: rgba(56, 189, 248, 0.4);
            box-shadow: var(--shadow-glow), var(--shadow-float);
            background: var(--bg-card-hover);
            transform: translateY(-4px);
        }
        .tool-card .card-img {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            border-radius: 0;
        }
        .tool-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.5s ease;
        }
        .tool-card:hover .card-img img {
            transform: scale(1.04);
        }
        .tool-card .card-img .tag-overlay {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 2;
        }
        .tool-card .card-body {
            padding: 20px 20px 18px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .tool-card .card-date {
            font-size: 12px;
            color: var(--text-muted);
            font-family: var(--font-num);
            letter-spacing: 0.03em;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .tool-card .card-title {
            font-family: var(--font-heading);
            font-size: 17px;
            font-weight: 600;
            line-height: 1.5;
            color: var(--text-main);
            margin-bottom: 8px;
            transition: color var(--transition);
        }
        .tool-card:hover .card-title {
            color: var(--accent-cyan);
        }
        .tool-card .card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
        }
        .tool-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .tool-card .card-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary-bright);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition);
        }
        .tool-card .card-link:hover {
            color: var(--accent-cyan);
            gap: 10px;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 11px;
            font-weight: 600;
            padding: 4px 11px;
            border-radius: 20px;
            letter-spacing: 0.03em;
        }
        .badge-cyan {
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.25);
            color: var(--accent-cyan);
        }
        .badge-amber {
            background: rgba(245, 158, 11, 0.1);
            border: 1px solid rgba(245, 158, 11, 0.25);
            color: var(--accent-amber);
        }
        .badge-blue {
            background: rgba(46, 119, 255, 0.12);
            border: 1px solid rgba(46, 119, 255, 0.3);
            color: #7EB4FF;
        }
        .side-card {
            background: var(--bg-card);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 22px;
            box-shadow: var(--shadow-card);
        }
        .hot-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .hot-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 13px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .hot-list li:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .hot-list .hot-rank {
            width: 26px;
            height: 26px;
            border-radius: 7px;
            background: rgba(56, 189, 248, 0.12);
            color: var(--accent-cyan);
            font-weight: 700;
            font-size: 13px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-family: var(--font-num);
        }
        .hot-list .hot-rank.top1 {
            background: rgba(245, 158, 11, 0.15);
            color: var(--accent-amber);
        }
        .hot-list .hot-rank.top2 {
            background: rgba(34, 211, 238, 0.15);
            color: var(--accent-cyan);
        }
        .hot-list .hot-rank.top3 {
            background: rgba(46, 119, 255, 0.15);
            color: #7EB4FF;
        }
        .hot-list .hot-info {
            flex: 1;
        }
        .hot-list .hot-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.5;
            margin-bottom: 3px;
        }
        .hot-list .hot-meta {
            font-size: 12px;
            color: var(--text-muted);
        }
        .topic-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .topic-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 18px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            transition: all var(--transition);
        }
        .topic-link:hover {
            color: #fff;
            border-color: rgba(56, 189, 248, 0.45);
            background: rgba(56, 189, 248, 0.1);
            box-shadow: var(--shadow-float);
            transform: translateY(-2px);
        }
        .topic-link i {
            color: var(--accent-cyan);
            font-size: 13px;
        }
        .form-card {
            background: var(--bg-card);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 28px;
            box-shadow: var(--shadow-card);
        }
        .form-inline {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            align-items: center;
        }
        .form-input {
            flex: 1;
            min-width: 220px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 10px;
            padding: 11px 16px;
            color: var(--text-main);
            font-size: 14px;
            outline: none;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .form-input::placeholder {
            color: var(--text-muted);
        }
        .form-input:focus {
            border-color: var(--border-focus);
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.12);
        }
        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-light);
            border-radius: 14px;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-float);
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(56, 189, 248, 0.25);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            padding: 17px 20px;
            background: transparent;
            border: none;
            color: var(--text-main);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            text-align: left;
            font-family: var(--font-body);
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--accent-cyan);
        }
        .faq-question:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: -2px;
        }
        .faq-question .faq-arrow {
            flex-shrink: 0;
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition);
        }
        .faq-item.is-open .faq-question .faq-arrow {
            transform: rotate(180deg);
            color: var(--accent-cyan);
        }
        .faq-answer {
            display: none;
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .faq-item.is-open .faq-answer {
            display: block;
        }
        .data-banner {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
            align-items: center;
            background: var(--bg-card);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 26px 30px;
            box-shadow: var(--shadow-card);
        }
        .data-banner .stat-item {
            display: flex;
            align-items: center;
            gap: 14px;
            flex: 1;
            min-width: 180px;
        }
        .data-banner .stat-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: rgba(56, 189, 248, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent-cyan);
            flex-shrink: 0;
        }
        .data-banner .stat-info h4 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin: 0;
            font-family: var(--font-num);
            line-height: 1.3;
        }
        .data-banner .stat-info p {
            font-size: 12px;
            color: var(--text-muted);
            margin: 0;
        }
        .site-footer {
            background: rgba(4, 9, 20, 0.8);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 52px 0 28px;
            margin-top: 30px;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .site-footer .footer-brand p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
            margin-top: 14px;
            max-width: 300px;
        }
        .site-footer .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            font-family: var(--font-heading);
        }
        .site-footer .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .site-footer .footer-col ul li {
            margin-bottom: 8px;
        }
        .site-footer .footer-col ul a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: color var(--transition);
        }
        .site-footer .footer-col ul a:hover {
            color: var(--accent-cyan);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .site-footer .footer-bottom a {
            color: var(--text-muted);
            font-size: 13px;
            transition: color var(--transition);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--accent-cyan);
        }
        .site-footer .footer-bottom .sep {
            margin: 0 8px;
            color: rgba(255, 255, 255, 0.15);
        }
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(5, 10, 20, 0.96);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            z-index: 999;
            padding: 24px 22px;
            overflow-y: auto;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .mobile-drawer.is-open {
            display: block;
        }
        .mobile-drawer .mobile-nav-menu {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .mobile-drawer .mobile-nav-menu li {
            margin-bottom: 4px;
        }
        .mobile-drawer .mobile-nav-menu a {
            display: block;
            padding: 13px 16px;
            font-size: 16px;
            color: var(--text-secondary);
            border-radius: 10px;
            font-weight: 500;
            transition: all var(--transition);
        }
        .mobile-drawer .mobile-nav-menu a:hover {
            color: #fff;
            background: rgba(56, 189, 248, 0.1);
        }
        .mobile-drawer .mobile-nav-menu li.is-active a {
            color: #fff;
            background: rgba(56, 189, 248, 0.15);
        }
        @media (max-width: 1024px) {
            .nav-menu {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .nav-search {
                min-width: 140px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .page-hero h1 {
                font-size: 34px;
            }
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 24px;
            }
            .page-hero h1 {
                font-size: 28px;
            }
            .page-hero .hero-summary {
                font-size: 14px;
            }
            .nav-search {
                display: none;
            }
            .tool-grid {
                grid-template-columns: 1fr;
            }
            .form-inline {
                flex-direction: column;
            }
            .form-input {
                min-width: 100%;
            }
            .data-banner {
                flex-direction: column;
                gap: 16px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .nav-logo {
                font-size: 18px;
            }
            .nav-logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
            .btn-lg {
                padding: 11px 22px;
                font-size: 14px;
            }
            .section-title {
                font-size: 21px;
            }
            .page-hero h1 {
                font-size: 24px;
            }
            .filter-bar {
                gap: 6px;
            }
            .filter-tag {
                font-size: 12px;
                padding: 6px 12px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-deep: #050A14;
            --bg-surface: #0A1224;
            --bg-card: rgba(15, 25, 45, 0.52);
            --bg-card-hover: rgba(18, 32, 58, 0.68);
            --bg-glass: rgba(15, 25, 45, 0.45);
            --primary: #2E77FF;
            --primary-bright: #38BDF8;
            --accent-cyan: #22D3EE;
            --accent-amber: #F59E0B;
            --accent-red: #F43F5E;
            --text-main: #E6F1FF;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border-light: rgba(255, 255, 255, 0.08);
            --border-focus: rgba(56, 189, 248, 0.55);
            --radius-card: 18px;
            --radius-btn: 11px;
            --radius-img: 14px;
            --shadow-card: 0 20px 50px rgba(0, 0, 0, 0.35);
            --shadow-float: 0 8px 24px rgba(0, 0, 0, 0.25);
            --shadow-glow: 0 0 18px rgba(56, 189, 248, 0.45);
            --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'HarmonyOS Sans SC', 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'system-ui', -apple-system, sans-serif;
            --font-num: 'Inter', 'Roboto', 'system-ui', sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background-color: var(--bg-deep);
            background-image:
                radial-gradient(ellipse at 18% -10%, rgba(46, 119, 255, 0.16) 0%, transparent 52%),
                radial-gradient(ellipse at 88% 8%, rgba(56, 189, 248, 0.08) 0%, transparent 45%),
                radial-gradient(ellipse at 50% 115%, rgba(34, 211, 238, 0.05) 0%, transparent 40%);
            min-height: 100vh;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }

        a {
            color: var(--primary-bright);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-cyan);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 22px;
            padding-right: 22px;
        }

        .section {
            padding: 64px 0;
            position: relative;
        }
        .section--tight {
            padding: 44px 0;
        }
        .section--alt {
            background-color: rgba(8, 16, 34, 0.55);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .section-label {
            display: inline-block;
            font-size: 12px;
            letter-spacing: 2.5px;
            text-transform: uppercase;
            color: var(--accent-cyan);
            background: rgba(34, 211, 238, 0.08);
            border: 1px solid rgba(34, 211, 238, 0.18);
            padding: 5px 14px;
            border-radius: 30px;
            margin-bottom: 14px;
            font-weight: 600;
        }

        .section-title {
            font-family: var(--font-heading);
            font-size: 30px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-main);
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 820px;
        }

        /* 导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(5, 10, 20, 0.82);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            min-height: 68px;
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            width: 100%;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-size: 22px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.02em;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-bright));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 19px;
            color: #FFF;
            box-shadow: 0 0 16px rgba(56, 189, 248, 0.4);
            flex-shrink: 0;
        }
        .nav-logo span {
            background: linear-gradient(135deg, #FFFFFF 60%, #B8D8FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 2px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu li {
            margin: 0;
        }
        .nav-menu a {
            display: block;
            padding: 8px 14px;
            font-size: 14.5px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            position: relative;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-menu a:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.05);
        }
        .nav-menu li.active a {
            color: var(--accent-cyan);
            background: rgba(34, 211, 238, 0.08);
        }
        .nav-menu li.active a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(34, 211, 238, 0.6);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 8px;
            padding: 7px 14px;
            transition: border-color var(--transition);
            min-width: 190px;
        }
        .nav-search i {
            color: var(--text-muted);
            font-size: 13px;
        }
        .nav-search input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-main);
            font-size: 13.5px;
            width: 100%;
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }
        .nav-search:focus-within {
            border-color: var(--border-focus);
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 11px 22px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            border: none;
            transition: all var(--transition);
            line-height: 1.4;
            text-decoration: none;
            white-space: nowrap;
        }
        .btn:hover {
            text-decoration: none;
        }
        .btn:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }
        .btn:active {
            transform: translateY(1px);
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-bright));
            color: #FFFFFF;
            box-shadow: var(--shadow-glow);
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, #3D8AFF, #4CC9F8);
            color: #FFFFFF;
            box-shadow: 0 0 28px rgba(56, 189, 248, 0.62);
            transform: translateY(-2px);
        }
        .btn-ghost {
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-main);
            border: 1px solid var(--border-light);
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.22);
            color: var(--text-main);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 13.5px;
            border-radius: 8px;
        }

        .nav-toggle {
            display: none;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: var(--text-main);
            width: 40px;
            height: 40px;
            border-radius: 8px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            transition: all var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* 面包屑 */
        .breadcrumb-bar {
            padding: 22px 0 0;
        }
        .breadcrumb-bar .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
            font-size: 14px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb-bar .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb-bar .breadcrumb a:hover {
            color: var(--accent-cyan);
        }
        .breadcrumb-bar .breadcrumb .sep {
            color: var(--text-muted);
        }
        .breadcrumb-bar .breadcrumb .current {
            color: var(--accent-cyan);
        }

        /* 分类头部 */
        .category-hero {
            padding: 32px 0 44px;
        }
        .category-hero h1 {
            font-family: var(--font-heading);
            font-size: 42px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-main);
            margin-bottom: 18px;
            letter-spacing: -0.01em;
        }
        .category-hero .cat-desc {
            font-size: 17px;
            line-height: 1.85;
            color: var(--text-secondary);
            max-width: 880px;
            margin-bottom: 0;
        }

        /* 筛选工具条 */
        .filter-bar {
            background: var(--bg-glass);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 18px 22px;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 36px;
        }
        .filter-tags {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .filter-tag {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 13.5px;
            font-weight: 500;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .filter-tag:hover {
            color: var(--text-main);
            border-color: rgba(255, 255, 255, 0.2);
        }
        .filter-tag.active {
            color: #FFFFFF;
            background: linear-gradient(135deg, var(--primary), var(--primary-bright));
            border-color: transparent;
            box-shadow: 0 0 12px rgba(56, 189, 248, 0.4);
        }
        .sort-control {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sort-control label {
            font-size: 13.5px;
            color: var(--text-muted);
            white-space: nowrap;
        }
        .sort-control select {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 8px;
            color: var(--text-main);
            padding: 8px 14px;
            font-size: 13.5px;
            cursor: pointer;
            outline: none;
            transition: border-color var(--transition);
        }
        .sort-control select:focus {
            border-color: var(--border-focus);
        }
        .sort-control select option {
            background: var(--bg-surface);
            color: var(--text-main);
        }

        /* 卡片列表 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .news-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(56, 189, 248, 0.3);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), 0 0 22px rgba(56, 189, 248, 0.12);
            transform: translateY(-4px);
        }
        .news-card .img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            flex-shrink: 0;
        }
        .news-card .img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.5s ease;
        }
        .news-card:hover .img-wrap img {
            transform: scale(1.05);
        }
        .news-card .img-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(5, 10, 20, 0.75));
            pointer-events: none;
        }
        .news-card .badge {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 2;
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(46, 119, 255, 0.85);
            color: #FFF;
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.18);
        }
        .news-card .card-body {
            padding: 18px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card .card-date {
            font-size: 12.5px;
            color: var(--text-muted);
            margin-bottom: 8px;
            font-family: var(--font-num);
            letter-spacing: 0.02em;
        }
        .news-card h3 {
            font-family: var(--font-heading);
            font-size: 18px;
            font-weight: 700;
            line-height: 1.5;
            color: var(--text-main);
            margin: 0 0 10px;
        }
        .news-card .card-excerpt {
            font-size: 14.5px;
            line-height: 1.75;
            color: var(--text-secondary);
            margin: 0 0 16px;
            flex: 1;
        }
        .news-card .card-footer-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
        }
        .news-card .card-tag {
            display: inline-block;
            padding: 3px 10px;
            border-radius: 14px;
            font-size: 12px;
            background: rgba(34, 211, 238, 0.1);
            color: var(--accent-cyan);
            border: 1px solid rgba(34, 211, 238, 0.2);
        }
        .news-card .read-more {
            font-size: 13.5px;
            font-weight: 600;
            color: var(--primary-bright);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: all var(--transition);
        }
        .news-card .read-more i {
            font-size: 11px;
            transition: transform var(--transition);
        }
        .news-card .read-more:hover {
            color: var(--accent-cyan);
        }
        .news-card .read-more:hover i {
            transform: translateX(3px);
        }

        /* 热榜侧栏 */
        .hot-panel {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 24px 22px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-card);
            position: sticky;
            top: 86px;
        }
        .hot-panel h3 {
            font-family: var(--font-heading);
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .hot-panel h3 i {
            color: var(--accent-amber);
            font-size: 16px;
        }
        .hot-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .hot-list li {
            margin: 0;
        }
        .hot-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 8px;
            border-radius: 10px;
            transition: background var(--transition);
        }
        .hot-item:hover {
            background: rgba(255, 255, 255, 0.04);
        }
        .hot-item .rank {
            font-family: var(--font-num);
            font-size: 20px;
            font-weight: 700;
            color: var(--text-muted);
            width: 28px;
            text-align: center;
            flex-shrink: 0;
            line-height: 1.4;
        }
        .hot-item:nth-child(1) .rank {
            color: var(--accent-amber);
        }
        .hot-item:nth-child(2) .rank {
            color: #CBD5E1;
        }
        .hot-item:nth-child(3) .rank {
            color: #B45309;
        }
        .hot-item .hot-info h4 {
            font-size: 14.5px;
            font-weight: 600;
            color: var(--text-main);
            margin: 0 0 2px;
            line-height: 1.5;
        }
        .hot-item .hot-info p {
            font-size: 12.5px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.5;
        }

        /* 相关专题入口 */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
        }
        .topic-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 26px 18px;
            text-align: center;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
        }
        .topic-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(56, 189, 248, 0.3);
            transform: translateY(-4px);
            box-shadow: var(--shadow-float);
        }
        .topic-card .topic-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(46, 119, 255, 0.12);
            border: 1px solid rgba(56, 189, 248, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary-bright);
        }
        .topic-card h4 {
            font-family: var(--font-heading);
            font-size: 15.5px;
            font-weight: 600;
            color: var(--text-main);
            margin: 0;
        }
        .topic-card p {
            font-size: 12.5px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }

        /* 订阅CTA */
        .subscribe-box {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 40px 32px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-card);
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }
        .subscribe-box h3 {
            font-family: var(--font-heading);
            font-size: 24px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 10px;
        }
        .subscribe-box p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0 0 24px;
        }
        .subscribe-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .subscribe-form input[type="email"] {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 8px;
            padding: 12px 18px;
            color: var(--text-main);
            font-size: 15px;
            min-width: 260px;
            flex: 1;
            outline: none;
            transition: border-color var(--transition);
        }
        .subscribe-form input[type="email"]::placeholder {
            color: var(--text-muted);
        }
        .subscribe-form input[type="email"]:focus {
            border-color: var(--border-focus);
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.12);
        }

        /* FAQ */
        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: 14px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(56, 189, 248, 0.2);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 18px 22px;
            cursor: pointer;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-question h4 {
            font-size: 15.5px;
            font-weight: 600;
            color: var(--text-main);
            margin: 0;
            line-height: 1.5;
        }
        .faq-question .fa-chevron-down {
            color: var(--text-muted);
            font-size: 13px;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .fa-chevron-down {
            transform: rotate(180deg);
            color: var(--accent-cyan);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
        }
        .faq-answer p {
            font-size: 14.5px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0;
            padding: 0 22px 20px;
        }

        /* 数据横幅 */
        .data-banner {
            background: rgba(15, 25, 45, 0.6);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 28px 30px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            display: flex;
            align-items: center;
            justify-content: space-around;
            flex-wrap: wrap;
            gap: 20px;
            box-shadow: var(--shadow-card);
        }
        .data-banner .stat-item {
            display: flex;
            align-items: center;
            gap: 14px;
            flex: 1;
            min-width: 150px;
            justify-content: center;
        }
        .data-banner .stat-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: rgba(46, 119, 255, 0.12);
            border: 1px solid rgba(56, 189, 248, 0.18);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 19px;
            color: var(--primary-bright);
            flex-shrink: 0;
        }
        .data-banner .stat-num {
            font-family: var(--font-num);
            font-size: 26px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.3;
        }
        .data-banner .stat-label {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.4;
        }

        /* 页脚 */
        .site-footer {
            background: rgba(5, 10, 20, 0.9);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 56px 0 28px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .nav-logo {
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0;
            max-width: 340px;
        }
        .footer-col h4 {
            font-family: var(--font-heading);
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 16px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .footer-col ul a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-secondary);
        }
        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom .sep {
            margin: 0 10px;
            color: rgba(255, 255, 255, 0.15);
        }

        /* 响应式设计 */
        @media (max-width: 1024px) {
            .nav-search {
                min-width: 140px;
            }
            .nav-menu a {
                padding: 8px 10px;
                font-size: 13.5px;
            }
            .topic-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .category-hero h1 {
                font-size: 36px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section--tight {
                padding: 32px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(5, 10, 20, 0.96);
                backdrop-filter: blur(22px);
                -webkit-backdrop-filter: blur(22px);
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 22px;
                gap: 4px;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                width: 100%;
                padding: 12px 14px;
                font-size: 15px;
            }
            .nav-menu li.active a::after {
                display: none;
            }
            .nav-actions {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .category-hero h1 {
                font-size: 32px;
            }
            .category-hero .cat-desc {
                font-size: 15.5px;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .hot-panel {
                position: static;
                margin-top: 20px;
            }
            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
            }
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .data-banner {
                flex-direction: column;
                align-items: flex-start;
                padding: 22px;
            }
            .data-banner .stat-item {
                justify-content: flex-start;
                min-width: auto;
            }
            .subscribe-form {
                flex-direction: column;
            }
            .subscribe-form input[type="email"] {
                min-width: 100%;
            }
            .subscribe-form .btn {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section {
                padding: 38px 0;
            }
            .category-hero h1 {
                font-size: 27px;
            }
            .section-title {
                font-size: 23px;
            }
            .topic-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .footer-brand {
                grid-column: auto;
            }
            .nav-logo {
                font-size: 19px;
            }
            .nav-logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 16px;
                border-radius: 8px;
            }
            .data-banner .stat-num {
                font-size: 22px;
            }
            .news-card .card-body {
                padding: 14px 16px 18px;
            }
            .news-card h3 {
                font-size: 16px;
            }
            .breadcrumb-bar {
                padding: 14px 0 0;
            }
            .breadcrumb-bar .breadcrumb {
                font-size: 13px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-deep: #050A14;
            --bg-surface: #0A1224;
            --bg-card: rgba(15, 25, 45, 0.52);
            --bg-card-hover: rgba(18, 32, 58, 0.68);
            --bg-glass: rgba(15, 25, 45, 0.45);
            --primary: #2E77FF;
            --primary-bright: #38BDF8;
            --accent-cyan: #22D3EE;
            --accent-amber: #F59E0B;
            --accent-red: #F43F5E;
            --text-main: #E6F1FF;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border-light: rgba(255, 255, 255, 0.08);
            --border-focus: rgba(56, 189, 248, 0.55);
            --radius-card: 18px;
            --radius-btn: 11px;
            --radius-img: 14px;
            --shadow-card: 0 20px 50px rgba(0, 0, 0, 0.35);
            --shadow-float: 0 8px 24px rgba(0, 0, 0, 0.25);
            --shadow-glow: 0 0 18px rgba(56, 189, 248, 0.45);
            --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'HarmonyOS Sans SC', 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'system-ui', -apple-system, sans-serif;
            --font-num: 'Inter', 'Roboto', 'system-ui', sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background-color: var(--bg-deep);
            background-image:
                radial-gradient(ellipse at 18% -10%, rgba(46, 119, 255, 0.18) 0%, transparent 52%),
                radial-gradient(ellipse at 88% 8%, rgba(56, 189, 248, 0.10) 0%, transparent 45%),
                radial-gradient(ellipse at 50% 115%, rgba(34, 211, 238, 0.06) 0%, transparent 40%);
            min-height: 100vh;
            overflow-x: hidden;
            margin: 0;
        }

        a {
            color: var(--primary-bright);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--accent-cyan);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 22px;
            padding-right: 22px;
        }

        .section {
            padding: 64px 0;
            position: relative;
        }

        .section--tight {
            padding: 40px 0;
        }

        .section--alt {
            background-color: rgba(8, 16, 34, 0.55);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .section-label {
            display: inline-block;
            font-size: 12px;
            letter-spacing: 2.5px;
            text-transform: uppercase;
            color: var(--accent-cyan);
            background: rgba(34, 211, 238, 0.08);
            border: 1px solid rgba(34, 211, 238, 0.18);
            padding: 5px 14px;
            border-radius: 30px;
            margin-bottom: 14px;
            font-weight: 600;
        }

        .section-title {
            font-family: var(--font-heading);
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-main);
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 820px;
        }

        /* 导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(5, 10, 20, 0.82);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            min-height: 68px;
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            width: 100%;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-size: 22px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.02em;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-bright));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 19px;
            color: #FFF;
            box-shadow: 0 0 16px rgba(56, 189, 248, 0.4);
            flex-shrink: 0;
        }

        .nav-logo span {
            background: linear-gradient(135deg, #FFFFFF 60%, #B8D8FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 2px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu li {
            position: relative;
        }

        .nav-menu li a {
            display: block;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            transition: color var(--transition), background-color var(--transition);
            white-space: nowrap;
        }

        .nav-menu li a:hover {
            color: #FFFFFF;
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-menu li.active a {
            color: #FFFFFF;
            background: rgba(46, 119, 255, 0.18);
            box-shadow: inset 0 -2px 0 var(--primary-bright);
        }

        .nav-menu li.active a::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            background: var(--primary-bright);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(56, 189, 248, 0.6);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-light);
            border-radius: 10px;
            padding: 8px 14px;
            width: 190px;
            transition: border-color var(--transition);
        }

        .nav-search i {
            color: var(--text-muted);
            font-size: 13px;
        }

        .nav-search input {
            background: transparent;
            border: none;
            color: var(--text-main);
            font-size: 13px;
            outline: none;
            width: 100%;
            padding: 0;
        }

        .nav-search input::placeholder {
            color: var(--text-muted);
        }

        .nav-search:focus-within {
            border-color: var(--border-focus);
        }

        .nav-toggle {
            display: none;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-light);
            border-radius: 10px;
            color: var(--text-main);
            font-size: 20px;
            padding: 8px 12px;
            cursor: pointer;
            transition: background-color var(--transition);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        /* 按钮 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            border-radius: var(--radius-btn);
            padding: 11px 24px;
            border: none;
            cursor: pointer;
            transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition);
            white-space: nowrap;
            text-align: center;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-bright));
            color: #FFFFFF;
            box-shadow: var(--shadow-glow);
        }

        .btn-primary:hover {
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 0 24px rgba(56, 189, 248, 0.6);
        }

        .btn-primary:focus-visible {
            outline: 2px solid var(--primary-bright);
            outline-offset: 2px;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 10px rgba(56, 189, 248, 0.3);
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.16);
            color: var(--text-main);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.3);
            color: #FFFFFF;
            transform: translateY(-2px);
        }

        .btn-secondary:focus-visible {
            outline: 2px solid var(--primary-bright);
            outline-offset: 2px;
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
            border-radius: 9px;
        }

        .btn-block {
            width: 100%;
            justify-content: center;
        }

        /* 面包屑 */
        .breadcrumb-section {
            padding: 28px 0 8px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 18px;
            list-style: none;
            padding: 0;
        }

        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .breadcrumb li:not(:last-child)::after {
            content: '/';
            color: var(--text-muted);
            margin-left: 8px;
        }

        .breadcrumb a {
            color: var(--text-secondary);
        }

        .breadcrumb a:hover {
            color: var(--accent-cyan);
        }

        .breadcrumb li:last-child {
            color: var(--text-main);
            font-weight: 500;
        }

        /* 分类头部 */
        .category-header {
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border-light);
            margin-bottom: 24px;
        }

        .category-header h1 {
            font-family: var(--font-heading);
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-main);
            margin: 0 0 14px;
            letter-spacing: -0.01em;
        }

        .category-header .lead {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 800px;
            margin: 0;
        }

        /* 筛选工具条 */
        .filter-toolbar {
            background: var(--bg-glass);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 18px 20px;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 36px;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
        }

        .filter-toolbar .filter-label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
            white-space: nowrap;
        }

        .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .filter-tag {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 13px;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.10);
            cursor: pointer;
            transition: all var(--transition);
            font-weight: 500;
        }

        .filter-tag:hover {
            color: #FFFFFF;
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.22);
        }

        .filter-tag.active {
            color: #FFFFFF;
            background: rgba(46, 119, 255, 0.25);
            border-color: var(--primary-bright);
            box-shadow: 0 0 10px rgba(56, 189, 248, 0.18);
        }

        .filter-sort {
            margin-left: auto;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .filter-sort label {
            font-size: 13px;
            color: var(--text-muted);
        }

        .filter-sort select {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-light);
            border-radius: 8px;
            color: var(--text-main);
            padding: 7px 12px;
            font-size: 13px;
            outline: none;
            cursor: pointer;
            transition: border-color var(--transition);
        }

        .filter-sort select:focus {
            border-color: var(--border-focus);
        }

        /* 两栏布局 */
        .content-grid {
            display: flex;
            gap: 30px;
            flex-wrap: wrap;
        }

        .main-column {
            flex: 1 1 0;
            min-width: 0;
        }

        .sidebar {
            flex: 0 0 320px;
            min-width: 0;
        }

        /* 卡片网格 */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 22px;
        }

        .data-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
            display: flex;
            flex-direction: column;
        }

        .data-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
            border-color: rgba(56, 189, 248, 0.3);
        }

        .data-card__image {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            border-radius: 0;
        }

        .data-card__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.5s ease;
        }

        .data-card:hover .data-card__image img {
            transform: scale(1.06);
        }

        .data-card__image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(5, 10, 20, 0.55));
        }

        .data-card__body {
            padding: 18px 18px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .data-card__meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .data-card__meta i {
            font-size: 12px;
            color: var(--accent-cyan);
        }

        .data-card__title {
            font-family: var(--font-heading);
            font-size: 17px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text-main);
            margin: 0 0 8px;
        }

        .data-card__title a {
            color: inherit;
        }

        .data-card__title a:hover {
            color: var(--accent-cyan);
        }

        .data-card__excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0 0 14px;
            flex: 1;
        }

        .data-card__tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-bottom: 14px;
        }

        .data-tag {
            display: inline-block;
            padding: 3px 10px;
            border-radius: 20px;
            font-size: 11px;
            color: var(--accent-cyan);
            background: rgba(34, 211, 238, 0.08);
            border: 1px solid rgba(34, 211, 238, 0.18);
            font-weight: 500;
        }

        .data-card__link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary-bright);
            transition: color var(--transition);
            align-self: flex-start;
        }

        .data-card__link:hover {
            color: var(--accent-cyan);
        }

        .data-card__link i {
            font-size: 12px;
            transition: transform var(--transition);
        }

        .data-card__link:hover i {
            transform: translateX(3px);
        }

        /* 热榜侧栏 */
        .sidebar-widget {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 20px;
            margin-bottom: 22px;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
        }

        .sidebar-widget__title {
            font-family: var(--font-heading);
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-widget__title i {
            color: var(--accent-amber);
            font-size: 16px;
        }

        .hot-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .hot-list li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            padding-bottom: 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .hot-list li:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .hot-list__rank {
            font-family: var(--font-num);
            font-size: 22px;
            font-weight: 700;
            color: var(--accent-amber);
            line-height: 1;
            min-width: 30px;
            text-align: center;
        }

        .hot-list__rank.top {
            color: #F59E0B;
        }

        .hot-list__content {
            flex: 1;
            min-width: 0;
        }

        .hot-list__content a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-main);
            line-height: 1.4;
            display: block;
        }

        .hot-list__content a:hover {
            color: var(--accent-cyan);
        }

        .hot-list__meta {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 3px;
        }

        /* 相关专题入口 */
        .topics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 14px;
        }

        .topic-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 16px 18px;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: 14px;
            color: var(--text-main);
            transition: all var(--transition);
            font-weight: 500;
            font-size: 14px;
        }

        .topic-link i {
            font-size: 18px;
            color: var(--primary-bright);
            transition: color var(--transition);
        }

        .topic-link:hover {
            border-color: rgba(56, 189, 248, 0.3);
            background: var(--bg-card-hover);
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: var(--shadow-float);
        }

        .topic-link:hover i {
            color: var(--accent-cyan);
        }

        /* 订阅 CTA */
        .subscribe-banner {
            background: linear-gradient(135deg, rgba(46, 119, 255, 0.15), rgba(56, 189, 248, 0.08));
            border: 1px solid rgba(56, 189, 248, 0.2);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
        }

        .subscribe-banner__info {
            flex: 1;
            min-width: 240px;
        }

        .subscribe-banner__info h3 {
            font-family: var(--font-heading);
            font-size: 21px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 6px;
        }

        .subscribe-banner__info p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
        }

        .subscribe-form {
            display: flex;
            gap: 10px;
            flex: 1;
            min-width: 260px;
            max-width: 440px;
        }

        .subscribe-form input {
            flex: 1;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 10px;
            color: var(--text-main);
            padding: 11px 16px;
            font-size: 14px;
            outline: none;
            transition: border-color var(--transition);
        }

        .subscribe-form input::placeholder {
            color: var(--text-muted);
        }

        .subscribe-form input:focus {
            border-color: var(--border-focus);
        }

        /* FAQ */
        .faq-accordion {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
        }

        .faq-accordion .accordion-item {
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .faq-accordion .accordion-item:last-child {
            border-bottom: none;
        }

        .faq-accordion .accordion-title {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            transition: background-color var(--transition);
            user-select: none;
        }

        .faq-accordion .accordion-title:hover {
            background: rgba(255, 255, 255, 0.04);
        }

        .faq-accordion .accordion-title .faq-icon {
            color: var(--accent-cyan);
            font-size: 14px;
            flex-shrink: 0;
            transition: transform var(--transition);
        }

        .faq-accordion .is-active .accordion-title .faq-icon {
            transform: rotate(180deg);
        }

        .faq-accordion .accordion-content {
            padding: 0 22px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            display: none;
        }

        .faq-accordion .is-active .accordion-content {
            display: block;
        }

        /* 数据横幅 */
        .data-banner {
            background: linear-gradient(135deg, rgba(10, 18, 36, 0.8), rgba(5, 10, 20, 0.9));
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-card);
            padding: 28px 22px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 20px;
        }

        .data-banner__item {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .data-banner__icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: rgba(46, 119, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary-bright);
            flex-shrink: 0;
        }

        .data-banner__text h4 {
            font-family: var(--font-heading);
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 4px;
        }

        .data-banner__text p {
            font-size: 13px;
            color: var(--text-muted);
            margin: 0;
        }

        /* 页脚 */
        .site-footer {
            background: rgba(4, 8, 16, 0.92);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 48px 0 28px;
            margin-top: 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand .nav-logo {
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 14px;
            letter-spacing: 0.04em;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .footer-col ul a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .footer-bottom .sep {
            margin: 0 8px;
            opacity: 0.5;
        }

        .footer-bottom a {
            color: var(--text-muted);
            font-size: 12px;
        }

        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .nav-menu {
                gap: 0;
            }
            .nav-menu li a {
                padding: 8px 9px;
                font-size: 13px;
            }
            .nav-search {
                width: 150px;
            }
            .sidebar {
                flex: 0 0 280px;
            }
        }

        @media (max-width: 900px) {
            .nav-menu {
                display: none;
            }
            .nav-actions {
                display: none;
            }
            .nav-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .site-header .container {
                justify-content: space-between;
            }
            /* 移动抽屉 */
            .nav-menu.nav-open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(5, 10, 20, 0.96);
                backdrop-filter: blur(22px);
                -webkit-backdrop-filter: blur(22px);
                border-bottom: 1px solid var(--border-light);
                padding: 16px 22px;
                gap: 4px;
                z-index: 999;
            }
            .nav-menu.nav-open li {
                width: 100%;
            }
            .nav-menu.nav-open li a {
                padding: 12px 16px;
                font-size: 15px;
                display: block;
                border-radius: 10px;
            }
            .nav-actions.nav-open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: calc(68px + 300px);
                left: 0;
                right: 0;
                background: rgba(5, 10, 20, 0.96);
                padding: 16px 22px;
                border-bottom: 1px solid var(--border-light);
                gap: 12px;
                z-index: 998;
            }
            .nav-actions.nav-open .nav-search {
                width: 100%;
            }
            .content-grid {
                flex-direction: column;
            }
            .sidebar {
                flex: 1 1 auto;
                width: 100%;
            }
            .category-header h1 {
                font-size: 28px;
            }
            .section {
                padding: 44px 0;
            }
        }

        @media (max-width: 640px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .category-header h1 {
                font-size: 24px;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .filter-toolbar {
                flex-direction: column;
                align-items: flex-start;
            }
            .filter-sort {
                margin-left: 0;
                width: 100%;
            }
            .filter-sort select {
                flex: 1;
            }
            .subscribe-banner {
                flex-direction: column;
                align-items: stretch;
                padding: 22px 18px;
            }
            .subscribe-form {
                flex-direction: column;
                max-width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                text-align: left;
            }
        }

        @media (max-width: 420px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .data-banner {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
                padding: 20px 16px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-deep: #050A14;
            --bg-surface: #0A1224;
            --bg-card: rgba(15, 25, 45, 0.52);
            --bg-card-hover: rgba(18, 32, 58, 0.68);
            --bg-glass: rgba(15, 25, 45, 0.45);
            --primary: #2E77FF;
            --primary-bright: #38BDF8;
            --accent-cyan: #22D3EE;
            --accent-amber: #F59E0B;
            --accent-red: #F43F5E;
            --text-main: #E6F1FF;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border-light: rgba(255, 255, 255, 0.08);
            --border-focus: rgba(56, 189, 248, 0.55);
            --radius-card: 18px;
            --radius-btn: 11px;
            --radius-img: 14px;
            --shadow-card: 0 20px 50px rgba(0, 0, 0, 0.35);
            --shadow-float: 0 8px 24px rgba(0, 0, 0, 0.25);
            --shadow-glow: 0 0 18px rgba(56, 189, 248, 0.45);
            --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'HarmonyOS Sans SC', 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'system-ui', -apple-system, sans-serif;
            --font-num: 'Inter', 'Roboto', 'system-ui', sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-main);
            background-color: var(--bg-deep);
            background-image:
                radial-gradient(ellipse at 18% -10%, rgba(46, 119, 255, 0.16) 0%, transparent 52%),
                radial-gradient(ellipse at 88% 8%, rgba(56, 189, 248, 0.08) 0%, transparent 45%),
                radial-gradient(ellipse at 50% 115%, rgba(34, 211, 238, 0.05) 0%, transparent 40%);
            min-height: 100vh;
            overflow-x: hidden;
        }
        a {
            color: var(--primary-bright);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 22px;
            padding-right: 22px;
        }
        .section {
            padding: 64px 0;
            position: relative;
        }
        .section--tight {
            padding: 44px 0;
        }
        .section--alt {
            background-color: rgba(8, 16, 34, 0.55);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }
        .section-label {
            display: inline-block;
            font-size: 12px;
            letter-spacing: 2.5px;
            text-transform: uppercase;
            color: var(--accent-cyan);
            background: rgba(34, 211, 238, 0.08);
            border: 1px solid rgba(34, 211, 238, 0.18);
            padding: 5px 14px;
            border-radius: 30px;
            margin-bottom: 14px;
            font-weight: 600;
        }
        .section-title {
            font-family: var(--font-heading);
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-main);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 820px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(5, 10, 20, 0.82);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            min-height: 68px;
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            width: 100%;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-size: 22px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.02em;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-bright));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 19px;
            color: #FFF;
            box-shadow: 0 0 16px rgba(56, 189, 248, 0.4);
            flex-shrink: 0;
        }
        .nav-logo span {
            background: linear-gradient(135deg, #FFFFFF 60%, #B8D8FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 2px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu li {
            display: inline-block;
        }
        .nav-menu a {
            display: block;
            padding: 8px 12px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            position: relative;
            transition: color var(--transition);
        }
        .nav-menu a:hover {
            color: var(--text-main);
        }
        .nav-menu a::after {
            content: '';
            position: absolute;
            left: 12px;
            right: 12px;
            bottom: 2px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent-cyan));
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition);
        }
        .nav-menu a:hover::after,
        .nav-menu li.active a::after {
            transform: scaleX(1);
        }
        .nav-menu li.active a {
            color: var(--text-main);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 10px;
            padding: 6px 14px;
            color: var(--text-muted);
            width: 190px;
            transition: border-color var(--transition);
        }
        .nav-search:focus-within {
            border-color: var(--border-focus);
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.12);
        }
        .nav-search input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-main);
            font-size: 13px;
            width: 100%;
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 18px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 14px;
            cursor: pointer;
            border: 1px solid transparent;
            transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition);
            white-space: nowrap;
            line-height: 1.4;
        }
        .btn:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }
        .btn:active {
            transform: translateY(0) scale(0.98);
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-bright));
            color: #FFFFFF;
            box-shadow: 0 0 16px rgba(56, 189, 248, 0.35);
        }
        .btn-primary:hover {
            box-shadow: 0 0 26px rgba(56, 189, 248, 0.55);
            transform: translateY(-2px);
            color: #FFFFFF;
        }
        .btn-secondary {
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(255, 255, 255, 0.14);
            color: var(--text-main);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(56, 189, 248, 0.4);
            transform: translateY(-2px);
            color: #FFFFFF;
        }
        .btn-sm {
            padding: 8px 14px;
            font-size: 13px;
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 8px;
            color: var(--text-main);
            font-size: 18px;
            padding: 6px 12px;
            cursor: pointer;
            transition: background-color var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        .breadcrumb-bar {
            padding: 18px 0 4px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb-bar a {
            color: var(--text-secondary);
        }
        .breadcrumb-bar a:hover {
            color: var(--accent-cyan);
        }
        .breadcrumb-bar .separator {
            margin: 0 8px;
            color: var(--text-muted);
        }
        .page-hero {
            padding: 36px 0 44px;
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: -40% -20% auto;
            background: radial-gradient(ellipse at 30% 20%, rgba(46, 119, 255, 0.22) 0%, transparent 55%);
            pointer-events: none;
        }
        .page-hero h1 {
            font-family: var(--font-heading);
            font-size: 40px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .page-hero .hero-desc {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 780px;
            position: relative;
            z-index: 1;
        }
        .filter-bar {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            background: rgba(15, 25, 45, 0.45);
            border: 1px solid var(--border-light);
            border-radius: 14px;
            padding: 14px 18px;
            backdrop-filter: blur(14px);
        }
        .filter-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .filter-tag {
            display: inline-block;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.10);
            color: var(--text-secondary);
            cursor: pointer;
            transition: all var(--transition);
        }
        .filter-tag:hover {
            border-color: rgba(56, 189, 248, 0.4);
            color: var(--text-main);
            background: rgba(56, 189, 248, 0.08);
        }
        .filter-tag.active {
            background: rgba(56, 189, 248, 0.14);
            border-color: rgba(56, 189, 248, 0.5);
            color: var(--accent-cyan);
            box-shadow: 0 0 12px rgba(56, 189, 248, 0.15);
        }
        .filter-select {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 10px;
            color: var(--text-main);
            padding: 8px 14px;
            font-size: 13px;
            outline: none;
            cursor: pointer;
            transition: border-color var(--transition);
        }
        .filter-select:focus {
            border-color: var(--border-focus);
        }
        .filter-select option {
            background: var(--bg-surface);
            color: var(--text-main);
        }
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 26px 60px rgba(0, 0, 0, 0.42);
            border-color: rgba(56, 189, 248, 0.25);
        }
        .card-img {
            overflow: hidden;
            border-radius: 0;
            aspect-ratio: 16 / 9;
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.5s ease;
        }
        .card:hover .card-img img {
            transform: scale(1.04);
        }
        .card-body {
            padding: 18px 20px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }
        .card-tag {
            display: inline-block;
            padding: 3px 10px;
            border-radius: 20px;
            font-size: 11px;
            font-weight: 600;
            background: rgba(56, 189, 248, 0.10);
            border: 1px solid rgba(56, 189, 248, 0.22);
            color: var(--accent-cyan);
        }
        .card-title {
            font-family: var(--font-heading);
            font-size: 18px;
            font-weight: 600;
            line-height: 1.45;
            color: var(--text-main);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card-link {
            margin-top: auto;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary-bright);
            transition: color var(--transition);
        }
        .card-link:hover {
            color: var(--accent-cyan);
        }
        .card-link i {
            font-size: 12px;
            transition: transform var(--transition);
        }
        .card-link:hover i {
            transform: translateX(3px);
        }
        .sidebar-widget {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 20px 22px;
            backdrop-filter: blur(18px);
            box-shadow: var(--shadow-card);
            margin-bottom: 24px;
        }
        .sidebar-widget h3 {
            font-family: var(--font-heading);
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-widget h3 i {
            color: var(--accent-amber);
            font-size: 16px;
        }
        .rank-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .rank-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .rank-list li:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .rank-num {
            font-family: var(--font-num);
            font-size: 20px;
            font-weight: 700;
            color: var(--accent-amber);
            width: 32px;
            flex-shrink: 0;
            line-height: 1.3;
        }
        .rank-content {
            flex: 1;
        }
        .rank-content h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 3px;
            line-height: 1.4;
        }
        .rank-content p {
            font-size: 12px;
            color: var(--text-muted);
            margin: 0;
        }
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
        }
        .topic-card {
            display: block;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 12px;
            padding: 14px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            text-align: center;
        }
        .topic-card:hover {
            background: rgba(56, 189, 248, 0.08);
            border-color: rgba(56, 189, 248, 0.3);
            color: var(--text-main);
            transform: translateY(-2px);
        }
        .topic-card i {
            display: block;
            font-size: 18px;
            margin-bottom: 6px;
            color: var(--accent-cyan);
        }
        .cta-panel {
            background: linear-gradient(135deg, rgba(15, 25, 45, 0.7), rgba(20, 40, 70, 0.6));
            border: 1px solid rgba(56, 189, 248, 0.2);
            border-radius: var(--radius-card);
            padding: 32px 30px;
            text-align: center;
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(20px);
        }
        .cta-panel h3 {
            font-family: var(--font-heading);
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .cta-panel p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 500px;
            margin: 0 auto 20px;
            line-height: 1.8;
        }
        .subscribe-form {
            display: flex;
            gap: 10px;
            max-width: 440px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }
        .subscribe-form input {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 10px;
            padding: 10px 14px;
            color: var(--text-main);
            font-size: 14px;
            outline: none;
            flex: 1 1 200px;
            min-width: 0;
            transition: border-color var(--transition);
        }
        .subscribe-form input::placeholder {
            color: var(--text-muted);
        }
        .subscribe-form input:focus {
            border-color: var(--border-focus);
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.12);
        }
        .faq-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: 14px;
            padding: 0;
            backdrop-filter: blur(18px);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-card.open {
            border-color: rgba(56, 189, 248, 0.3);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--accent-cyan);
        }
        .faq-question i {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-card.open .faq-question i {
            transform: rotate(180deg);
            color: var(--accent-cyan);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .faq-card.open .faq-answer {
            max-height: 300px;
        }
        .faq-answer p {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0;
        }
        .data-banner {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-light);
            border-radius: 14px;
            padding: 20px 24px;
        }
        .data-banner-item {
            display: flex;
            align-items: center;
            gap: 12px;
            flex: 1 1 160px;
            min-width: 140px;
        }
        .data-banner-item i {
            font-size: 22px;
            color: var(--accent-cyan);
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(56, 189, 248, 0.08);
            border: 1px solid rgba(56, 189, 248, 0.18);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .data-banner-item span {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
        }
        .data-banner-item strong {
            display: block;
            font-size: 16px;
            color: var(--text-main);
            font-family: var(--font-num);
        }
        .site-footer {
            background: rgba(5, 10, 20, 0.85);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 48px 0 28px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 14px;
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            font-family: var(--font-heading);
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 14px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom .sep {
            margin: 0 8px;
            opacity: 0.5;
        }
        .grid-x.grid-padding-x .cell {
            padding-left: 10px;
            padding-right: 10px;
        }
        .grid-padding-x {
            margin-left: -10px;
            margin-right: -10px;
        }
        .main-grid {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 300px;
            gap: 28px;
            align-items: start;
        }
        .main-grid .content-col {
            min-width: 0;
        }
        .main-grid .sidebar-col {
            min-width: 0;
        }
        @media (max-width: 1024px) {
            .nav-search {
                width: 140px;
            }
            .nav-menu a {
                padding: 8px 8px;
                font-size: 14px;
            }
            .main-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr;
            }
            .footer-col:last-child {
                display: none;
            }
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .section-title {
                font-size: 24px;
            }
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(5, 10, 20, 0.97);
                backdrop-filter: blur(22px);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 22px 20px;
                gap: 6px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 12px 16px;
                font-size: 15px;
                border-radius: 10px;
            }
            .nav-menu a::after {
                display: none;
            }
            .nav-menu a:hover {
                background: rgba(255, 255, 255, 0.05);
            }
            .nav-search {
                display: none;
            }
            .nav-actions .btn-primary {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .data-banner {
                gap: 14px;
                padding: 16px;
            }
            .data-banner-item {
                flex: 1 1 100%;
            }
            .topic-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .page-hero h1 {
                font-size: 28px;
            }
            .section-title {
                font-size: 22px;
            }
            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-col:last-child {
                display: block;
            }
            .card-body {
                padding: 14px 16px 16px;
            }
            .card-title {
                font-size: 16px;
            }
            .subscribe-form {
                flex-direction: column;
            }
            .subscribe-form input {
                width: 100%;
            }
        }

/* roulang page: category5 */
:root {
            --bg-deep: #050A14;
            --bg-surface: #0A1224;
            --bg-card: rgba(15, 25, 45, 0.52);
            --bg-card-hover: rgba(18, 32, 58, 0.68);
            --bg-glass: rgba(15, 25, 45, 0.45);
            --primary: #2E77FF;
            --primary-bright: #38BDF8;
            --accent-cyan: #22D3EE;
            --accent-amber: #F59E0B;
            --accent-red: #F43F5E;
            --text-main: #E6F1FF;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border-light: rgba(255, 255, 255, 0.08);
            --border-focus: rgba(56, 189, 248, 0.55);
            --radius-card: 18px;
            --radius-btn: 11px;
            --radius-img: 14px;
            --shadow-card: 0 20px 50px rgba(0, 0, 0, 0.35);
            --shadow-float: 0 8px 24px rgba(0, 0, 0, 0.25);
            --shadow-glow: 0 0 18px rgba(56, 189, 248, 0.45);
            --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'HarmonyOS Sans SC', 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'system-ui', -apple-system, sans-serif;
            --font-num: 'Inter', 'Roboto', 'system-ui', sans-serif;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background-color: var(--bg-deep);
            background-image:
                radial-gradient(ellipse at 18% -10%, rgba(46, 119, 255, 0.18) 0%, transparent 52%),
                radial-gradient(ellipse at 88% 8%, rgba(56, 189, 248, 0.10) 0%, transparent 45%),
                radial-gradient(ellipse at 50% 115%, rgba(34, 211, 238, 0.06) 0%, transparent 40%);
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--primary-bright);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--accent-cyan);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 22px;
            padding-right: 22px;
        }

        .section {
            padding: 72px 0;
            position: relative;
        }

        .section--tight {
            padding: 48px 0;
        }

        .section--alt {
            background-color: rgba(8, 16, 34, 0.55);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .section-label {
            display: inline-block;
            font-size: 12px;
            letter-spacing: 2.5px;
            text-transform: uppercase;
            color: var(--accent-cyan);
            background: rgba(34, 211, 238, 0.08);
            border: 1px solid rgba(34, 211, 238, 0.18);
            padding: 5px 14px;
            border-radius: 30px;
            margin-bottom: 14px;
            font-weight: 600;
        }

        .section-title {
            font-family: var(--font-heading);
            font-size: 30px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-main);
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 820px;
        }

        /* 导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(5, 10, 20, 0.82);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            height: auto;
            min-height: 68px;
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            width: 100%;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-size: 22px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.02em;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-bright));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 19px;
            color: #FFF;
            box-shadow: 0 0 16px rgba(56, 189, 248, 0.4);
            flex-shrink: 0;
        }

        .nav-logo span {
            background: linear-gradient(135deg, #FFFFFF 60%, #B8D8FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 2px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu li {
            list-style: none;
            margin: 0;
        }

        .nav-menu a {
            display: block;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            position: relative;
            white-space: nowrap;
            transition: color var(--transition), background var(--transition);
        }

        .nav-menu a:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-menu a::after {
            content: '';
            position: absolute;
            left: 50%;
            bottom: 2px;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
            transform: translateX(-50%);
            transition: width var(--transition);
        }

        .nav-menu a:hover::after,
        .nav-menu li.active a::after {
            width: 22px;
        }

        .nav-menu li.active a {
            color: var(--accent-cyan);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 10px;
            padding: 7px 14px;
            min-width: 180px;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .nav-search:focus-within {
            border-color: var(--border-focus);
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
        }

        .nav-search i {
            color: var(--text-muted);
            font-size: 13px;
        }

        .nav-search input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-main);
            font-size: 13px;
            width: 100%;
        }

        .nav-search input::placeholder {
            color: var(--text-muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-btn);
            padding: 10px 20px;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 0.01em;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-align: center;
            line-height: 1.4;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-bright));
            color: #FFF;
            box-shadow: var(--shadow-glow);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 28px rgba(56, 189, 248, 0.6);
            color: #FFF;
        }

        .btn-primary:focus-visible {
            outline: 2px solid #FFF;
            outline-offset: 2px;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(56, 189, 248, 0.35);
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: var(--text-main);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.3);
            color: #FFF;
            transform: translateY(-1px);
        }

        .btn-secondary:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
        }

        .btn:disabled,
        .btn.disabled {
            opacity: 0.5;
            cursor: not-allowed;
            pointer-events: none;
        }

        .nav-toggle {
            display: none;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 10px;
            padding: 8px 12px;
            color: var(--text-main);
            font-size: 18px;
            cursor: pointer;
            transition: all var(--transition);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* 面包屑 */
        .breadcrumb-section {
            padding: 22px 0 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 13px;
            color: var(--text-muted);
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--accent-cyan);
        }

        .breadcrumb .separator {
            color: var(--text-muted);
            font-size: 10px;
        }

        .breadcrumb .current {
            color: var(--accent-cyan);
            font-weight: 500;
        }

        /* 页面头部 */
        .page-hero {
            padding: 36px 0 48px;
            position: relative;
        }

        .page-hero h1 {
            font-family: var(--font-heading);
            font-size: 40px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

        .page-hero p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 790px;
        }

        /* 筛选工具条 */
        .filter-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 14px;
            background: var(--bg-glass);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid var(--border-light);
            border-radius: 14px;
            padding: 14px 18px;
            box-shadow: var(--shadow-float);
            margin-bottom: 32px;
        }

        .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .filter-tag {
            padding: 6px 14px;
            font-size: 13px;
            font-weight: 500;
            border-radius: 20px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text-secondary);
            cursor: pointer;
            transition: all var(--transition);
            user-select: none;
            white-space: nowrap;
        }

        .filter-tag:hover {
            background: rgba(56, 189, 248, 0.1);
            border-color: rgba(56, 189, 248, 0.3);
            color: var(--accent-cyan);
        }

        .filter-tag.active {
            background: rgba(56, 189, 248, 0.15);
            border-color: rgba(56, 189, 248, 0.45);
            color: var(--accent-cyan);
            box-shadow: 0 0 10px rgba(56, 189, 248, 0.2);
        }

        .filter-sort {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .filter-sort select {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 8px;
            padding: 6px 12px;
            color: var(--text-main);
            font-size: 13px;
            outline: none;
            cursor: pointer;
            transition: border-color var(--transition);
        }

        .filter-sort select:focus {
            border-color: var(--border-focus);
        }

        .filter-sort select option {
            background: var(--bg-surface);
            color: var(--text-main);
        }

        /* 卡片网格 */
        .membership-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .membership-card {
            background: var(--bg-card);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .membership-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(56, 189, 248, 0.3);
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45), 0 0 20px rgba(56, 189, 248, 0.15);
            transform: translateY(-4px);
        }

        .membership-card .card-image {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            border-radius: 0;
        }

        .membership-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.4s ease;
        }

        .membership-card:hover .card-image img {
            transform: scale(1.04);
        }

        .card-image .image-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(5, 10, 20, 0.75);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: 20px;
            padding: 4px 12px;
            font-size: 12px;
            color: var(--accent-cyan);
            font-weight: 600;
            z-index: 2;
        }

        .membership-card .card-body {
            padding: 18px 20px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .card-date {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
            font-family: var(--font-num);
        }

        .card-title {
            font-family: var(--font-heading);
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
            line-height: 1.45;
        }

        .card-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
        }

        .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-bottom: 14px;
        }

        .card-tag {
            font-size: 12px;
            padding: 3px 10px;
            border-radius: 12px;
            background: rgba(56, 189, 248, 0.08);
            border: 1px solid rgba(56, 189, 248, 0.2);
            color: var(--accent-cyan);
            font-weight: 500;
        }

        .card-tag.amber {
            background: rgba(245, 158, 11, 0.08);
            border-color: rgba(245, 158, 11, 0.2);
            color: var(--accent-amber);
        }

        .card-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary-bright);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color var(--transition), gap var(--transition);
        }

        .card-link:hover {
            color: var(--accent-cyan);
            gap: 10px;
        }

        /* 侧栏与热榜 */
        .content-row {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 28px;
            align-items: start;
        }

        .hot-sidebar {
            background: var(--bg-glass);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 22px;
            box-shadow: var(--shadow-float);
            position: sticky;
            top: 84px;
        }

        .hot-sidebar h3 {
            font-family: var(--font-heading);
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .hot-sidebar h3 i {
            color: var(--accent-amber);
            font-size: 16px;
        }

        .hot-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .hot-item {
            display: flex;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background var(--transition);
            border-radius: 8px;
            padding: 12px;
            margin-bottom: 2px;
        }

        .hot-item:last-child {
            border-bottom: none;
            margin-bottom: 0;
        }

        .hot-item:hover {
            background: rgba(255, 255, 255, 0.04);
        }

        .hot-rank {
            font-family: var(--font-num);
            font-size: 20px;
            font-weight: 800;
            color: var(--text-muted);
            min-width: 32px;
            text-align: center;
            line-height: 1.4;
        }

        .hot-rank.top {
            color: var(--accent-amber);
            text-shadow: 0 0 12px rgba(245, 158, 11, 0.5);
        }

        .hot-content {
            flex: 1;
            min-width: 0;
        }

        .hot-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.5;
            display: block;
            margin-bottom: 4px;
            transition: color var(--transition);
        }

        .hot-item:hover .hot-title {
            color: var(--accent-cyan);
        }

        .hot-meta {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 相关专题入口 */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .topic-card {
            display: block;
            background: var(--bg-card);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 22px;
            box-shadow: var(--shadow-float);
            transition: all var(--transition);
            height: 100%;
        }

        .topic-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(56, 189, 248, 0.3);
            transform: translateY(-3px);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4), 0 0 16px rgba(56, 189, 248, 0.12);
            color: var(--text-main);
        }

        .topic-card .topic-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: rgba(56, 189, 248, 0.1);
            border: 1px solid rgba(56, 189, 248, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--accent-cyan);
            margin-bottom: 14px;
        }

        .topic-card h4 {
            font-family: var(--font-heading);
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
        }

        .topic-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 0;
        }

        /* CTA 区域 */
        .cta-panel {
            background: rgba(15, 25, 45, 0.6);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid rgba(56, 189, 248, 0.25);
            border-radius: 20px;
            padding: 40px 36px;
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4), 0 0 30px rgba(56, 189, 248, 0.12);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }

        .cta-panel h2 {
            font-family: var(--font-heading);
            font-size: 28px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
            line-height: 1.35;
        }

        .cta-panel p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 18px;
        }

        .cta-form {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .cta-form input[type="text"],
        .cta-form input[type="email"],
        .cta-form input[type="tel"] {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 10px;
            padding: 12px 16px;
            color: var(--text-main);
            font-size: 14px;
            outline: none;
            transition: border-color var(--transition), box-shadow var(--transition);
            width: 100%;
        }

        .cta-form input:focus {
            border-color: var(--border-focus);
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
        }

        .cta-form input::placeholder {
            color: var(--text-muted);
        }

        .cta-benefits {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 4px;
        }

        .cta-benefit {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .cta-benefit i {
            color: var(--accent-cyan);
            font-size: 12px;
        }

        /* FAQ */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-glass);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid var(--border-light);
            border-radius: 14px;
            margin-bottom: 12px;
            box-shadow: var(--shadow-float);
            transition: all var(--transition);
            overflow: hidden;
        }

        .faq-item:hover {
            border-color: rgba(56, 189, 248, 0.25);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            padding: 16px 20px;
            cursor: pointer;
            font-family: var(--font-heading);
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            user-select: none;
            transition: color var(--transition);
            list-style: none;
        }

        .faq-question:hover {
            color: var(--accent-cyan);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            color: var(--text-muted);
            font-size: 13px;
            transition: transform var(--transition), color var(--transition);
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
            color: var(--accent-cyan);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* 数据横幅 */
        .data-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .data-strip-item {
            background: var(--bg-glass);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid var(--border-light);
            border-radius: 14px;
            padding: 18px 20px;
            text-align: center;
            box-shadow: var(--shadow-float);
            transition: all var(--transition);
        }

        .data-strip-item:hover {
            border-color: rgba(56, 189, 248, 0.3);
            transform: translateY(-3px);
        }

        .data-strip-item i {
            font-size: 22px;
            color: var(--accent-cyan);
            margin-bottom: 8px;
            display: block;
        }

        .data-strip-item .data-num {
            font-family: var(--font-num);
            font-size: 24px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.3;
        }

        .data-strip-item .data-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        /* 页脚 */
        .site-footer {
            background: rgba(5, 10, 20, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-top: 1px solid var(--border-light);
            padding: 48px 0 24px;
            margin-top: 32px;
        }

        .site-footer .container {
            display: flex;
            flex-direction: column;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand .nav-logo {
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-family: var(--font-heading);
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 14px;
            letter-spacing: 0.05em;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-col li {
            margin-bottom: 8px;
        }

        .footer-col a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color var(--transition);
        }

        .footer-col a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .footer-bottom .sep {
            margin: 0 8px;
            opacity: 0.4;
        }

        .footer-bottom a {
            color: var(--text-muted);
            transition: color var(--transition);
        }

        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .nav-menu {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .nav-search {
                min-width: 140px;
            }
            .membership-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .content-row {
                grid-template-columns: 1fr;
            }
            .hot-sidebar {
                position: static;
                top: auto;
            }
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cta-panel {
                grid-template-columns: 1fr;
            }
            .data-strip {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .site-header .container {
                flex-wrap: nowrap;
            }
            .nav-search {
                display: none;
            }
            .nav-actions .btn-primary {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .section {
                padding: 48px 0;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .section-title {
                font-size: 25px;
            }
            .membership-grid {
                grid-template-columns: 1fr;
            }
            .topic-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .cta-panel {
                padding: 28px 22px;
            }
            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .page-hero h1 {
                font-size: 28px;
            }
            .section-title {
                font-size: 22px;
            }
            .btn {
                padding: 8px 16px;
                font-size: 13px;
            }
            .data-strip {
                grid-template-columns: 1fr;
            }
            .membership-card .card-body {
                padding: 14px 16px 16px;
            }
            .hot-sidebar {
                padding: 16px;
            }
            .cta-panel h2 {
                font-size: 22px;
            }
        }

        /* 移动端抽屉 */
        @media (max-width: 1024px) {
            .nav-menu {
                display: none;
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                bottom: 0;
                background: rgba(5, 10, 20, 0.95);
                backdrop-filter: blur(24px);
                -webkit-backdrop-filter: blur(24px);
                flex-direction: column;
                align-items: flex-start;
                padding: 24px 22px;
                gap: 6px;
                z-index: 999;
                overflow-y: auto;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                font-size: 16px;
                padding: 12px 16px;
                width: 100%;
                border-radius: 10px;
            }
            .nav-menu a::after {
                display: none;
            }
        }

/* roulang page: category6 */
:root {
            --bg-deep: #050A14;
            --bg-surface: #0A1224;
            --bg-card: rgba(15, 25, 45, 0.52);
            --bg-card-hover: rgba(18, 32, 58, 0.68);
            --bg-glass: rgba(15, 25, 45, 0.45);
            --primary: #2E77FF;
            --primary-bright: #38BDF8;
            --accent-cyan: #22D3EE;
            --accent-amber: #F59E0B;
            --accent-red: #F43F5E;
            --text-main: #E6F1FF;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border-light: rgba(255, 255, 255, 0.08);
            --border-focus: rgba(56, 189, 248, 0.55);
            --radius-card: 18px;
            --radius-btn: 11px;
            --radius-img: 14px;
            --shadow-card: 0 20px 50px rgba(0, 0, 0, 0.35);
            --shadow-float: 0 8px 24px rgba(0, 0, 0, 0.25);
            --shadow-glow: 0 0 18px rgba(56, 189, 248, 0.45);
            --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'HarmonyOS Sans SC', 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'system-ui', -apple-system, sans-serif;
            --font-num: 'Inter', 'Roboto', 'system-ui', sans-serif;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background-color: var(--bg-deep);
            background-image:
                radial-gradient(ellipse at 18% -10%, rgba(46, 119, 255, 0.18) 0%, transparent 52%),
                radial-gradient(ellipse at 88% 8%, rgba(56, 189, 248, 0.10) 0%, transparent 45%),
                radial-gradient(ellipse at 50% 115%, rgba(34, 211, 238, 0.06) 0%, transparent 40%);
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--primary-bright);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--accent-cyan);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 22px;
            padding-right: 22px;
        }

        .section {
            padding: 64px 0;
            position: relative;
        }

        .section--tight {
            padding: 40px 0;
        }

        .section--alt {
            background-color: rgba(8, 16, 34, 0.55);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .section-label {
            display: inline-block;
            font-size: 12px;
            letter-spacing: 2.5px;
            text-transform: uppercase;
            color: var(--accent-cyan);
            background: rgba(34, 211, 238, 0.08);
            border: 1px solid rgba(34, 211, 238, 0.18);
            padding: 5px 14px;
            border-radius: 30px;
            margin-bottom: 14px;
            font-weight: 600;
        }

        .section-title {
            font-family: var(--font-heading);
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-main);
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 820px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(5, 10, 20, 0.82);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            min-height: 68px;
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            width: 100%;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-size: 22px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.02em;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-bright));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 19px;
            color: #FFF;
            box-shadow: 0 0 16px rgba(56, 189, 248, 0.4);
            flex-shrink: 0;
        }

        .nav-logo span {
            background: linear-gradient(135deg, #FFFFFF 60%, #B8D8FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 2px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu li {
            margin: 0;
        }

        .nav-menu a {
            display: block;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            position: relative;
            transition: color var(--transition), background var(--transition);
            white-space: nowrap;
        }

        .nav-menu a:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.04);
        }

        .nav-menu li.active a {
            color: var(--accent-cyan);
        }

        .nav-menu li.active a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent-cyan));
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(34, 211, 238, 0.5);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-light);
            border-radius: 10px;
            padding: 7px 12px;
            min-width: 200px;
        }

        .nav-search i {
            color: var(--text-muted);
            font-size: 14px;
        }

        .nav-search input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-main);
            font-size: 14px;
            width: 100%;
        }

        .nav-search input::placeholder {
            color: var(--text-muted);
        }

        .nav-search:focus-within {
            border-color: var(--border-focus);
            box-shadow: 0 0 12px rgba(56, 189, 248, 0.15);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            padding: 10px 20px;
            font-size: 15px;
            line-height: 1.4;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-bright));
            color: #FFFFFF;
            box-shadow: 0 0 18px rgba(56, 189, 248, 0.35);
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, #3B83FF, #48C8FF);
            box-shadow: 0 0 28px rgba(56, 189, 248, 0.55);
            transform: translateY(-2px);
            color: #FFFFFF;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 14px rgba(56, 189, 248, 0.3);
        }

        .btn-primary:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
        }

        .btn-sm {
            padding: 7px 16px;
            font-size: 14px;
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.14);
            color: var(--text-main);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.24);
            color: var(--text-main);
            transform: translateY(-2px);
        }

        .btn-secondary:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
        }

        .btn-outline {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: var(--text-secondary);
        }

        .btn-outline:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        .nav-toggle {
            display: none;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-light);
            border-radius: 8px;
            color: var(--text-main);
            font-size: 20px;
            padding: 8px 12px;
            cursor: pointer;
            transition: background var(--transition);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 18px;
            flex-wrap: wrap;
            list-style: none;
            padding: 0;
        }

        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--accent-cyan);
        }

        .breadcrumb .separator {
            color: var(--text-muted);
            font-size: 12px;
        }

        .breadcrumb .current {
            color: var(--accent-cyan);
            font-weight: 500;
        }

        .page-hero {
            padding: 44px 0 30px;
            position: relative;
        }

        .page-hero h1 {
            font-family: var(--font-heading);
            font-size: 38px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .page-hero .summary {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 860px;
        }

        .filter-bar {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: 14px;
            padding: 14px 18px;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
        }

        .filter-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 16px;
            font-size: 13px;
            font-weight: 500;
            border-radius: 30px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-light);
            color: var(--text-secondary);
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .filter-tag:hover {
            border-color: rgba(56, 189, 248, 0.4);
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.08);
        }

        .filter-tag.active {
            background: rgba(56, 189, 248, 0.12);
            border-color: rgba(56, 189, 248, 0.45);
            color: var(--accent-cyan);
        }

        .filter-tag:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
        }

        .filter-sort {
            margin-left: auto;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .filter-sort label {
            font-size: 13px;
            color: var(--text-muted);
        }

        .filter-sort select {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-light);
            border-radius: 8px;
            padding: 7px 12px;
            color: var(--text-main);
            font-size: 13px;
            outline: none;
            cursor: pointer;
            transition: border-color var(--transition);
        }

        .filter-sort select:focus {
            border-color: var(--border-focus);
        }

        .filter-sort select option {
            background: var(--bg-surface);
            color: var(--text-main);
        }

        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .info-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .info-card:hover {
            border-color: rgba(56, 189, 248, 0.3);
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45), 0 0 24px rgba(56, 189, 248, 0.12);
            transform: translateY(-4px);
        }

        .info-card .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            border-radius: var(--radius-card) var(--radius-card) 0 0;
        }

        .info-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-card) var(--radius-card) 0 0;
            transition: transform var(--transition);
        }

        .info-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }

        .info-card .card-body {
            padding: 18px 20px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .info-card .card-date {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .info-card .card-title {
            font-family: var(--font-heading);
            font-size: 17px;
            font-weight: 600;
            line-height: 1.45;
            color: var(--text-main);
            margin-bottom: 10px;
            transition: color var(--transition);
        }

        .info-card:hover .card-title {
            color: var(--accent-cyan);
        }

        .info-card .card-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 16px;
            flex: 1;
        }

        .info-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
        }

        .card-tag {
            display: inline-block;
            padding: 4px 12px;
            font-size: 12px;
            border-radius: 20px;
            background: rgba(56, 189, 248, 0.1);
            border: 1px solid rgba(56, 189, 248, 0.22);
            color: var(--accent-cyan);
        }

        .read-more {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 14px;
            font-weight: 500;
            color: var(--primary-bright);
            transition: color var(--transition);
        }

        .read-more i {
            font-size: 12px;
            transition: transform var(--transition);
        }

        .read-more:hover {
            color: var(--accent-cyan);
        }

        .read-more:hover i {
            transform: translateX(3px);
        }

        .hot-ranking {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 24px;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            box-shadow: var(--shadow-card);
        }

        .hot-ranking h3 {
            font-family: var(--font-heading);
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .hot-ranking h3 i {
            color: var(--accent-amber);
        }

        .hot-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .hot-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .hot-item:hover {
            padding-left: 4px;
        }

        .hot-rank {
            font-family: var(--font-num);
            font-size: 26px;
            font-weight: 800;
            line-height: 1;
            color: var(--text-muted);
            flex-shrink: 0;
            min-width: 40px;
            text-align: center;
            padding-top: 4px;
        }

        .hot-item:nth-child(1) .hot-rank {
            color: var(--accent-amber);
        }

        .hot-item:nth-child(2) .hot-rank {
            color: #C0C8D8;
        }

        .hot-item:nth-child(3) .hot-rank {
            color: #B08A5A;
        }

        .hot-info h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.5;
            margin-bottom: 4px;
        }

        .hot-info p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        .hot-info a {
            color: var(--text-main);
        }

        .hot-info a:hover h4 {
            color: var(--accent-cyan);
        }

        .topic-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 14px;
        }

        .topic-card {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 22px 14px;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: 14px;
            text-align: center;
            transition: all var(--transition);
            color: var(--text-secondary);
        }

        .topic-card i {
            font-size: 24px;
            color: var(--primary-bright);
            transition: color var(--transition);
        }

        .topic-card span {
            font-size: 14px;
            font-weight: 500;
        }

        .topic-card:hover {
            border-color: rgba(56, 189, 248, 0.35);
            background: var(--bg-card-hover);
            color: var(--text-main);
            transform: translateY(-3px);
        }

        .topic-card:hover i {
            color: var(--accent-cyan);
        }

        .topic-card:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
        }

        .subscribe-panel {
            background: linear-gradient(135deg, rgba(46, 119, 255, 0.14), rgba(56, 189, 248, 0.08));
            border: 1px solid rgba(56, 189, 248, 0.22);
            border-radius: var(--radius-card);
            padding: 36px;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            box-shadow: var(--shadow-card);
            display: flex;
            align-items: center;
            gap: 28px;
            flex-wrap: wrap;
        }

        .subscribe-panel .sub-info {
            flex: 1;
            min-width: 260px;
        }

        .subscribe-panel .sub-info h3 {
            font-family: var(--font-heading);
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .subscribe-panel .sub-info p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        .subscribe-form {
            display: flex;
            gap: 10px;
            flex: 1;
            min-width: 280px;
            max-width: 480px;
        }

        .subscribe-form input[type="email"] {
            flex: 1;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 10px;
            padding: 12px 16px;
            color: var(--text-main);
            font-size: 15px;
            outline: none;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .subscribe-form input[type="email"]::placeholder {
            color: var(--text-muted);
        }

        .subscribe-form input[type="email"]:focus {
            border-color: var(--border-focus);
            box-shadow: 0 0 12px rgba(56, 189, 248, 0.15);
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: 14px;
            overflow: hidden;
            transition: border-color var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(56, 189, 248, 0.25);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 18px 20px;
            cursor: pointer;
            font-family: var(--font-heading);
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            transition: color var(--transition);
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
        }

        .faq-question:hover {
            color: var(--accent-cyan);
        }

        .faq-question:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: -2px;
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            font-size: 16px;
            color: var(--accent-cyan);
            transition: transform var(--transition);
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer p {
            padding: 0 20px 18px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0;
        }

        .data-banner {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .data-item {
            text-align: center;
            padding: 22px 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: 14px;
            transition: all var(--transition);
        }

        .data-item:hover {
            border-color: rgba(56, 189, 248, 0.3);
            transform: translateY(-3px);
        }

        .data-item .data-icon {
            font-size: 24px;
            color: var(--primary-bright);
            margin-bottom: 10px;
        }

        .data-item .data-number {
            font-family: var(--font-num);
            font-size: 28px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 4px;
        }

        .data-item .data-label {
            font-size: 14px;
            color: var(--text-secondary);
        }

        .site-footer {
            background: rgba(5, 10, 20, 0.92);
            border-top: 1px solid var(--border-light);
            padding: 48px 0 24px;
            margin-top: 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-top: 14px;
            max-width: 320px;
        }

        .footer-col h4 {
            font-family: var(--font-heading);
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 14px;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-col li {
            margin-bottom: 8px;
        }

        .footer-col a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .footer-col a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid var(--border-light);
            font-size: 13px;
            color: var(--text-muted);
        }

        .footer-bottom .sep {
            margin: 0 8px;
            color: var(--text-muted);
        }

        .footer-bottom a {
            color: var(--text-muted);
            font-size: 13px;
        }

        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .topic-grid {
                grid-template-columns: repeat(3, 1fr);
            }

            .data-banner {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }

            .nav-search {
                min-width: 140px;
            }

            .nav-menu a {
                padding: 8px 10px;
                font-size: 14px;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                align-items: flex-start;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(5, 10, 20, 0.95);
                backdrop-filter: blur(22px);
                -webkit-backdrop-filter: blur(22px);
                border-bottom: 1px solid var(--border-light);
                padding: 14px 22px;
                gap: 4px;
                z-index: 1000;
            }

            .nav-menu.open {
                display: flex;
            }

            .nav-menu li {
                width: 100%;
            }

            .nav-menu a {
                padding: 12px 0;
                font-size: 16px;
                display: block;
                width: 100%;
            }

            .nav-menu li.active a::after {
                display: none;
            }

            .nav-actions {
                gap: 8px;
            }

            .nav-search {
                display: none;
            }

            .nav-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }

            .site-header .container {
                position: relative;
            }

            .page-hero h1 {
                font-size: 30px;
            }

            .card-grid {
                grid-template-columns: 1fr;
            }

            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .subscribe-panel {
                flex-direction: column;
                align-items: flex-start;
                padding: 24px;
            }

            .subscribe-form {
                flex-direction: column;
                width: 100%;
                max-width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }

            .filter-sort {
                margin-left: 0;
                width: 100%;
                flex-wrap: wrap;
            }

            .section {
                padding: 48px 0;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .page-hero h1 {
                font-size: 26px;
            }

            .topic-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }

            .data-banner {
                grid-template-columns: 1fr;
            }

            .btn {
                padding: 9px 16px;
                font-size: 14px;
            }

            .nav-logo {
                font-size: 18px;
            }

            .nav-logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }

            .info-card .card-title {
                font-size: 16px;
            }
        }