/* roulang page: index */
:root {
            --bg-primary: #0A0E17;
            --bg-secondary: #111827;
            --surface: #1A2234;
            --surface-hover: #1F2937;
            --primary: #8B5CF6;
            --secondary: #22D3EE;
            --accent: #F59E0B;
            --gold: #FBBF24;
            --success: #10B981;
            --danger: #EF4444;
            --text-primary: #F3F4F6;
            --text-secondary: #9CA3AF;
            --text-muted: #6B7280;
            --border-color: #2D3748;
            --shadow-glow-purple: 0 0 20px rgba(139, 92, 246, 0.3);
            --shadow-glow-cyan: 0 0 20px rgba(34, 211, 238, 0.25);
            --shadow-glow-accent: 0 0 20px rgba(245, 158, 11, 0.3);
            --radius-sm: 8px;
            --radius-lg: 12px;
            --radius-btn: 6px;
            --radius-metric: 10px;
            --sidebar-width: 260px;
            --topbar-height: 64px;
        }

        *,
        *::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: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            font-size: 15px;
            font-weight: 400;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            min-height: 100vh;
            overflow-x: hidden;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            color: var(--text-primary);
            line-height: 1.2;
            letter-spacing: -0.01em;
            margin-top: 0;
        }

        h1 {
            font-size: 40px;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
        }

        h3 {
            font-size: 22px;
            font-weight: 600;
            line-height: 1.35;
        }

        p {
            margin-bottom: 1.2em;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:hover {
            color: var(--secondary);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

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

        button {
            cursor: pointer;
            border: none;
            outline: none;
            background: none;
        }

        input:focus,
        select:focus,
        textarea:focus {
            outline: none;
            border-color: var(--primary) !important;
            box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2) !important;
        }

        ::placeholder {
            color: var(--text-muted);
            opacity: 0.7;
        }

        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }

        ::-webkit-scrollbar-track {
            background: var(--bg-primary);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 3px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-muted);
        }

        .container-custom {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        @media (min-width: 1280px) {
            .container-custom {
                max-width: 1280px;
                padding-left: 32px;
                padding-right: 32px;
            }
        }

        @media (max-width: 1024px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        @media (max-width: 640px) {
            .container-custom {
                padding-left: 12px;
                padding-right: 12px;
            }
        }

        /* Topbar */
        .topbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--topbar-height);
            z-index: 1000;
            background: var(--bg-primary);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
        }

        .topbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            height: 100%;
            padding: 0 20px;
            gap: 16px;
        }

        .topbar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }

        .topbar-logo a {
            color: var(--text-primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .topbar-logo a:hover {
            color: var(--primary);
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-btn);
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            flex-shrink: 0;
        }

        .topbar-search {
            flex: 1;
            max-width: 320px;
            min-width: 160px;
            position: relative;
        }

        .topbar-search input {
            width: 100%;
            height: 40px;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            padding: 8px 16px 8px 40px;
            color: var(--text-primary);
            font-size: 14px;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .topbar-search input:focus {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow-purple);
        }

        .topbar-search .search-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 14px;
            pointer-events: none;
        }

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

        .topbar-select {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            color: var(--text-secondary);
            font-size: 13px;
            padding: 6px 10px;
            cursor: pointer;
            transition: border-color 0.2s ease;
            height: 36px;
        }

        .topbar-select:hover {
            border-color: var(--primary);
        }

        .topbar-lang-btn {
            height: 36px;
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            padding: 6px 12px;
            color: var(--text-secondary);
            font-size: 13px;
            cursor: pointer;
            transition: border-color 0.2s ease, color 0.2s ease;
        }

        .topbar-lang-btn:hover {
            border-color: var(--primary);
            color: var(--text-primary);
        }

        .hamburger-btn {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--border-color);
            background: var(--surface);
            color: var(--text-primary);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: border-color 0.2s ease;
        }

        .hamburger-btn:hover {
            border-color: var(--primary);
        }

        @media (max-width: 768px) {
            .topbar-inner {
                padding: 0 12px;
                gap: 8px;
            }
            .topbar-search {
                display: none;
            }
            .topbar-right .topbar-select {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .topbar-logo {
                font-size: 18px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
        }

        /* Sidebar */
        .sidebar {
            position: fixed;
            top: var(--topbar-height);
            left: 0;
            width: var(--sidebar-width);
            bottom: 0;
            background: #0D1117;
            border-right: 1px solid var(--border-color);
            overflow-y: auto;
            z-index: 900;
            transition: transform 0.25s ease;
            padding: 16px 12px 24px;
        }

        .sidebar-heading {
            font-size: 12px;
            font-weight: 600;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            padding: 8px 12px 10px;
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 8px;
        }

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

        .sidebar-list li {
            margin-bottom: 2px;
        }

        .sidebar-list a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 12px;
            border-radius: 6px;
            color: var(--text-secondary);
            font-size: 13px;
            line-height: 1.5;
            transition: background 0.2s ease, color 0.2s ease, border-left 0.2s ease;
            border-left: 2px solid transparent;
            text-decoration: none;
        }

        .sidebar-list a:hover {
            background: rgba(139, 92, 246, 0.08);
            color: var(--text-primary);
            border-left-color: var(--primary);
        }

        .sidebar-list a.active {
            background: rgba(139, 92, 246, 0.12);
            color: var(--primary);
            border-left-color: var(--secondary);
            font-weight: 500;
        }

        .sidebar-list .section-index {
            font-size: 11px;
            color: var(--text-muted);
            min-width: 18px;
            text-align: center;
            font-weight: 600;
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 850;
            opacity: 0;
            transition: opacity 0.25s ease;
        }

        @media (max-width: 1024px) {
            .sidebar {
                transform: translateX(-100%);
                box-shadow: 4px 0 20px rgba(0, 0, 0, 0.4);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay.active {
                display: block;
                opacity: 1;
            }
        }

        /* Main layout */
        .main-wrapper {
            padding-top: var(--topbar-height);
        }

        @media (min-width: 1025px) {
            .main-wrapper {
                margin-left: var(--sidebar-width);
            }
        }

        main {
            min-height: calc(100vh - var(--topbar-height));
        }

        /* Section base */
        section {
            padding: 64px 0;
            border-bottom: 1px solid var(--border-color);
        }

        section:nth-child(even) {
            background-color: var(--bg-secondary);
        }

        section:nth-child(odd) {
            background-color: var(--bg-primary);
        }

        @media (max-width: 768px) {
            section {
                padding: 48px 0;
            }
        }

        .section-header {
            margin-bottom: 36px;
        }

        .section-header h2 {
            margin-bottom: 12px;
        }

        .section-header p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
            max-width: 700px;
        }

        .section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(139, 92, 246, 0.1);
            border: 1px solid rgba(139, 92, 246, 0.3);
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.06em;
            text-transform: uppercase;
        }

        /* Cards */
        .card {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 20px;
            transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
        }

        .card:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow-purple);
        }

        .card-lg {
            border-radius: var(--radius-lg);
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--accent);
            color: #0A0E17;
            font-weight: 600;
            border-radius: var(--radius-btn);
            padding: 10px 20px;
            font-size: 14px;
            transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
            border: none;
            cursor: pointer;
            text-decoration: none;
        }

        .btn-primary:hover {
            background: var(--gold);
            box-shadow: var(--shadow-glow-accent);
            transform: translateY(-2px);
        }

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

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            font-weight: 600;
            border-radius: var(--radius-btn);
            padding: 10px 20px;
            font-size: 14px;
            transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
            border: 1px solid var(--primary);
            cursor: pointer;
            text-decoration: none;
        }

        .btn-outline:hover {
            background: rgba(139, 92, 246, 0.12);
            border-color: rgba(139, 92, 246, 0.7);
            color: var(--text-primary);
        }

        .btn-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--border-color);
            background: var(--surface);
            color: var(--text-secondary);
            transition: border-color 0.2s ease, color 0.2s ease;
            cursor: pointer;
        }

        .btn-icon:hover {
            border-color: var(--primary);
            color: var(--text-primary);
        }

        /* Tags and badges */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 500;
            padding: 3px 10px;
            border-radius: 4px;
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: border-color 0.2s ease;
        }

        .badge:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .badge-primary {
            background: rgba(139, 92, 246, 0.1);
            border-color: rgba(139, 92, 246, 0.3);
            color: var(--primary);
        }

        .badge-cyan {
            background: rgba(34, 211, 238, 0.1);
            border-color: rgba(34, 211, 238, 0.3);
            color: var(--secondary);
        }

        .badge-gold {
            background: rgba(251, 191, 36, 0.1);
            border-color: rgba(251, 191, 36, 0.3);
            color: var(--gold);
        }

        /* Grid layouts */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .grid-4,
            .grid-3,
            .grid-2 {
                grid-template-columns: 1fr;
            }
        }

        /* List items */
        .list-card {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 16px;
            transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
        }

        .list-card:hover {
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow-purple);
        }

        .list-card-thumb {
            width: 120px;
            height: 72px;
            border-radius: 4px;
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
        }

        @media (max-width: 520px) {
            .list-card {
                flex-direction: column;
            }
            .list-card-thumb {
                width: 100%;
                height: auto;
                aspect-ratio: 16/9;
            }
        }

        /* FAQ Accordion */
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.2s ease;
        }

        .faq-item:hover {
            border-color: var(--primary);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 16px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            border: none;
            text-align: left;
            gap: 12px;
        }

        .faq-question .fa-chevron-down {
            transition: transform 0.3s ease;
            color: var(--text-muted);
            flex-shrink: 0;
        }

        .faq-item.open .fa-chevron-down {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 20px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 16px;
        }

        /* Form */
        .form-input {
            width: 100%;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            padding: 10px 12px;
            color: var(--text-primary);
            font-size: 14px;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .form-input:focus {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow-purple);
        }

        /* Footer */
        .site-footer {
            background: #0D1117;
            border-top: 1px solid var(--border-color);
            padding: 48px 0 24px;
        }

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

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        .footer-brand {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .footer-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

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

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

        .footer-col ul a {
            font-size: 13px;
            color: var(--text-secondary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

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

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

        /* Hero specific */
        .hero-section {
            background-image: url('/assets/images/6ec342f17c76ccd9.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
            padding: 80px 0;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(10, 14, 23, 0.78);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }

        .hero-title {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            color: #fff;
        }

        .hero-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-search {
            max-width: 560px;
            margin: 0 auto 32px;
            position: relative;
        }

        .hero-search input {
            width: 100%;
            height: 48px;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            padding: 12px 20px 12px 48px;
            color: var(--text-primary);
            font-size: 15px;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .hero-search input:focus {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow-purple);
        }

        .hero-search .hero-search-icon {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 16px;
            pointer-events: none;
        }

        .hero-categories {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            justify-content: center;
            margin-bottom: 24px;
        }

        .hero-categories .badge {
            font-size: 13px;
            padding: 6px 14px;
            border-radius: 20px;
        }

        .hero-btns {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
        }

        @media (max-width: 768px) {
            .hero-section {
                padding: 56px 0;
            }
            .hero-title {
                font-size: 30px;
            }
            .hero-subtitle {
                font-size: 14px;
            }
        }

        /* Data metric */
        .metric-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--accent);
            font-family: 'Inter', 'PingFang SC', sans-serif;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

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

        /* Timeline / steps */
        .step-card {
            position: relative;
            padding-left: 24px;
        }

        .step-number {
            font-family: 'Inter', sans-serif;
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
            opacity: 0.5;
            line-height: 1;
            margin-bottom: 8px;
        }

        /* Testimonials */
        .testimonial-card {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 20px;
            transition: border-color 0.2s ease;
        }

        .testimonial-card:hover {
            border-color: var(--primary);
        }

        .testimonial-quote {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
            font-style: italic;
        }

        .testimonial-author {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 0;
        }

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

        /* Horizontal card */
        .card-horizontal {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        @media (min-width: 768px) {
            .card-horizontal {
                flex-direction: row;
                align-items: center;
            }
        }

        /* Data bar */
        .data-bar {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
        }

        .data-bar-track {
            flex: 1;
            height: 8px;
            background: var(--bg-secondary);
            border-radius: 4px;
            overflow: hidden;
        }

        .data-bar-fill {
            height: 100%;
            border-radius: 4px;
            transition: width 0.4s ease;
        }

        /* Video placeholder */
        .video-placeholder {
            aspect-ratio: 16/9;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            position: relative;
            overflow: hidden;
            flex-direction: column;
            gap: 8px;
        }

        .video-placeholder .play-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(139, 92, 246, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: #fff;
            transition: background 0.2s ease;
        }

        .video-placeholder:hover .play-icon {
            background: rgba(139, 92, 246, 0.6);
        }

        /* Floating CTA */
        .floating-cta {
            position: fixed;
            bottom: 20px;
            right: 20px;
            z-index: 800;
            background: var(--accent);
            color: #0A0E17;
            font-weight: 600;
            font-size: 14px;
            padding: 12px 20px;
            border-radius: var(--radius-btn);
            box-shadow: var(--shadow-glow-accent);
            display: flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            transition: background 0.2s ease, transform 0.2s ease;
        }

        .floating-cta:hover {
            background: var(--gold);
            transform: translateY(-2px);
        }

        @media (max-width: 640px) {
            .floating-cta {
                bottom: 12px;
                right: 12px;
                padding: 10px 16px;
                font-size: 13px;
            }
        }

        /* Accessibility */
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border-width: 0;
        }

        /* Table-like data row */
        .data-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .data-row:last-child {
            border-bottom: none;
        }

        .data-row-label {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .data-row-value {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            font-family: 'Inter', sans-serif;
        }

        .bg-image-cover {
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
        }

        .bg-image-cover::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(10, 14, 23, 0.75);
            z-index: 1;
            border-radius: inherit;
        }

        .bg-image-cover>* {
            position: relative;
            z-index: 2;
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0A0E17;
            --bg-secondary: #111827;
            --surface: #1A2234;
            --surface-hover: #1F2937;
            --primary: #8B5CF6;
            --secondary: #22D3EE;
            --accent: #F59E0B;
            --gold: #FBBF24;
            --success: #10B981;
            --danger: #EF4444;
            --text-primary: #F3F4F6;
            --text-secondary: #9CA3AF;
            --text-muted: #6B7280;
            --border-color: #2D3748;
            --shadow-glow-purple: 0 0 20px rgba(139, 92, 246, 0.3);
            --shadow-glow-cyan: 0 0 20px rgba(34, 211, 238, 0.25);
            --shadow-glow-accent: 0 0 20px rgba(245, 158, 11, 0.3);
            --radius-sm: 8px;
            --radius-lg: 12px;
            --radius-btn: 6px;
            --radius-metric: 10px;
            --sidebar-width: 260px;
            --topbar-height: 64px;
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            font-size: 15px;
            font-weight: 400;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:hover {
            color: var(--secondary);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

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

        button {
            cursor: pointer;
            border: none;
            outline: none;
            background: none;
        }

        input:focus,
        select:focus,
        textarea:focus {
            outline: none;
            border-color: var(--primary) !important;
            box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2) !important;
        }

        .container-custom {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }

        @media (max-width: 1024px) {
            .container-custom {
                padding-left: 20px;
                padding-right: 20px;
            }
        }

        @media (max-width: 640px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* Topbar */
        .topbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--topbar-height);
            z-index: 1000;
            background: var(--bg-primary);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
        }

        .topbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            height: 100%;
            padding: 0 20px;
            gap: 16px;
        }

        .topbar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }

        .topbar-logo a {
            color: var(--text-primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .topbar-logo a:hover {
            color: var(--primary);
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-btn);
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            flex-shrink: 0;
        }

        .topbar-search {
            flex: 1;
            max-width: 320px;
            min-width: 160px;
            position: relative;
        }

        .topbar-search input {
            width: 100%;
            height: 40px;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            padding: 8px 16px 8px 40px;
            color: var(--text-primary);
            font-size: 14px;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .topbar-search input:focus {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow-purple);
        }

        .topbar-search .search-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 14px;
            pointer-events: none;
        }

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

        .topbar-select {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            color: var(--text-secondary);
            font-size: 13px;
            padding: 6px 10px;
            cursor: pointer;
            transition: border-color 0.2s ease;
            height: 36px;
        }

        .topbar-select:hover {
            border-color: var(--primary);
        }

        .topbar-lang-btn {
            height: 36px;
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            padding: 0 10px;
            color: var(--text-secondary);
            font-size: 13px;
            cursor: pointer;
            transition: border-color 0.2s ease;
        }

        .topbar-lang-btn:hover {
            border-color: var(--primary);
        }

        .sidebar {
            position: fixed;
            top: var(--topbar-height);
            bottom: 0;
            left: 0;
            width: var(--sidebar-width);
            background: #0D1117;
            border-right: 1px solid var(--border-color);
            padding: 20px 12px;
            overflow-y: auto;
            z-index: 900;
            transition: transform 0.3s ease;
        }

        .sidebar-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-list li a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 12px;
            border-radius: var(--radius-btn);
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
            border-left: 2px solid transparent;
        }

        .sidebar-list li a:hover {
            background: rgba(139, 92, 246, 0.08);
            color: var(--text-primary);
        }

        .sidebar-list li a.active {
            background: rgba(139, 92, 246, 0.16);
            color: var(--text-primary);
            border-left: 2px solid var(--secondary);
        }

        .section-index {
            font-size: 11px;
            color: var(--text-muted);
            width: 20px;
            flex-shrink: 0;
        }

        .main-content {
            margin-left: var(--sidebar-width);
            padding-top: var(--topbar-height);
            min-height: 100vh;
        }

        @media (max-width: 1024px) {
            .sidebar {
                transform: translateX(-100%);
                box-shadow: 0 0 30px rgba(0, 0, 0, 0.5);
            }
            .sidebar.mobile-open {
                transform: translateX(0);
            }
            .main-content {
                margin-left: 0;
            }
            .mobile-overlay {
                display: block;
                position: fixed;
                inset: 0;
                background: rgba(0, 0, 0, 0.5);
                z-index: 850;
            }
        }

        .mobile-overlay {
            display: none;
        }

        /* Section */
        section {
            padding: 48px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .section-alt {
            background-color: var(--bg-secondary);
        }

        .section-highlight {
            background: var(--surface);
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .section-desc {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 800px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 10px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(139, 92, 246, 0.15);
            color: var(--primary);
            border: 1px solid rgba(139, 92, 246, 0.3);
        }

        .badge-cyan {
            background: rgba(34, 211, 238, 0.15);
            color: var(--secondary);
            border-color: rgba(34, 211, 238, 0.3);
        }

        .badge-accent {
            background: rgba(245, 158, 11, 0.15);
            color: var(--accent);
            border-color: rgba(245, 158, 11, 0.3);
        }

        .card {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 20px;
            transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
        }

        .card:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow-purple);
        }

        .btn-primary {
            background: var(--accent);
            color: #0A0E17;
            font-weight: 600;
            border-radius: var(--radius-btn);
            padding: 10px 20px;
            transition: background 0.2s, box-shadow 0.2s;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            border: 1px solid transparent;
        }

        .btn-primary:hover {
            background: var(--gold);
            box-shadow: var(--shadow-glow-accent);
            color: #0A0E17;
        }

        .btn-outline {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
            font-weight: 600;
            border-radius: var(--radius-btn);
            padding: 10px 20px;
            transition: background 0.2s, border-color 0.2s, color 0.2s;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
        }

        .btn-outline:hover {
            background: rgba(139, 92, 246, 0.12);
            border-color: var(--secondary);
            color: var(--text-primary);
        }

        .btn-ghost {
            background: var(--surface);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            font-weight: 500;
            border-radius: var(--radius-btn);
            padding: 8px 14px;
            transition: background 0.2s, border-color 0.2s;
        }

        .btn-ghost:hover {
            background: var(--surface-hover);
            border-color: var(--primary);
            color: var(--text-primary);
        }

        .filter-tag {
            padding: 6px 12px;
            border-radius: var(--radius-btn);
            background: var(--surface);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            font-size: 13px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.2s;
        }

        .filter-tag:hover,
        .filter-tag.active {
            background: rgba(139, 92, 246, 0.2);
            border-color: var(--primary);
            color: var(--text-primary);
        }

        .meta-item {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .card-image {
            border-radius: var(--radius-sm);
            overflow: hidden;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            aspect-ratio: 16/9;
            width: 100%;
        }

        .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s;
        }

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

        .metric-value {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.2;
            letter-spacing: -0.02em;
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

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

        .footer {
            background: #0D1117;
            border-top: 1px solid var(--border-color);
            padding: 40px 0 20px;
            margin-left: var(--sidebar-width);
        }

        @media (max-width: 1024px) {
            .footer {
                margin-left: 0;
            }
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
            gap: 24px;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 6px;
            margin-bottom: 10px;
        }

        .footer-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

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

        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color 0.2s;
        }

        .footer-col ul li a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            margin-top: 32px;
            padding-top: 16px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 12px;
            color: var(--text-muted);
        }

        @media (max-width: 640px) {
            .topbar-search {
                display: none;
            }
            .topbar-select {
                font-size: 11px;
                padding: 4px 6px;
            }
            .topbar-lang-btn span {
                display: none;
            }
            .section-title {
                font-size: 22px;
            }
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.2s;
        }

        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 20px;
            background: none;
            color: var(--text-primary);
            font-size: 15px;
            font-weight: 600;
            text-align: left;
            gap: 12px;
        }

        .faq-question i {
            transition: transform 0.2s;
            color: var(--text-muted);
        }

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

        .faq-answer {
            padding: 0 20px 16px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        .hero-section {
            padding: 48px 0 40px;
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-color);
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(34, 211, 238, 0.1);
            color: var(--secondary);
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            margin-bottom: 16px;
            border: 1px solid rgba(34, 211, 238, 0.3);
        }

        .hero-title {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .hero-sub {
            font-size: 18px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .trust-row {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-top: 24px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        @media (max-width: 768px) {
            .grid-3 {
                grid-template-columns: 1fr;
            }
            .hero-title {
                font-size: 32px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0A0E17;
            --bg-secondary: #111827;
            --surface: #1A2234;
            --surface-hover: #1F2937;
            --primary: #8B5CF6;
            --secondary: #22D3EE;
            --accent: #F59E0B;
            --gold: #FBBF24;
            --success: #10B981;
            --danger: #EF4444;
            --text-primary: #F3F4F6;
            --text-secondary: #9CA3AF;
            --text-muted: #6B7280;
            --border-color: #2D3748;
            --shadow-glow-purple: 0 0 20px rgba(139, 92, 246, 0.3);
            --shadow-glow-cyan: 0 0 20px rgba(34, 211, 238, 0.25);
            --shadow-glow-accent: 0 0 20px rgba(245, 158, 11, 0.3);
            --radius-sm: 8px;
            --radius-lg: 12px;
            --radius-btn: 6px;
            --radius-metric: 10px;
            --sidebar-width: 260px;
            --topbar-height: 64px;
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            font-size: 15px;
            font-weight: 400;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--secondary);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            outline: none;
            background: none;
        }
        input:focus, select:focus, textarea:focus {
            outline: none;
            border-color: var(--primary) !important;
            box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2) !important;
        }

        .container-custom {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Topbar */
        .topbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--topbar-height);
            z-index: 1000;
            background: var(--bg-primary);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
        }
        .topbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            height: 100%;
            padding: 0 20px;
            gap: 12px;
        }
        .topbar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }
        .topbar-logo a {
            color: var(--text-primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .topbar-logo a:hover {
            color: var(--primary);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-btn);
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            flex-shrink: 0;
        }
        .topbar-search {
            flex: 1;
            max-width: 280px;
            min-width: 120px;
            position: relative;
        }
        .topbar-search input {
            width: 100%;
            height: 40px;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            padding: 8px 16px 8px 40px;
            color: var(--text-primary);
            font-size: 14px;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }
        .topbar-search input:focus {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow-purple);
        }
        .topbar-search .search-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 14px;
            pointer-events: none;
        }
        .topbar-right {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .topbar-select {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            color: var(--text-secondary);
            font-size: 13px;
            padding: 6px 10px;
            cursor: pointer;
            transition: border-color 0.2s ease;
            height: 36px;
        }
        .topbar-select:hover {
            border-color: var(--primary);
        }
        .topbar-lang-btn {
            height: 36px;
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            padding: 6px 10px;
            font-size: 13px;
            color: var(--text-secondary);
            cursor: pointer;
            transition: border-color 0.2s ease;
        }
        .topbar-lang-btn:hover {
            border-color: var(--primary);
        }
        .topbar-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-shrink: 0;
        }
        .topbar-nav a {
            color: var(--text-secondary);
            font-size: 13px;
            padding: 6px 10px;
            border-radius: var(--radius-btn);
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .topbar-nav a:hover {
            color: var(--text-primary);
            background: var(--surface);
        }
        .topbar-nav a.active {
            color: var(--primary);
            background: rgba(139, 92, 246, 0.12);
            font-weight: 600;
        }
        .mobile-menu-btn {
            display: none;
            width: 36px;
            height: 36px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--border-color);
            background: var(--surface);
            color: var(--text-secondary);
            font-size: 16px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.2s ease;
            flex-shrink: 0;
        }
        .mobile-menu-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Sidebar */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 998;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .sidebar-overlay.active {
            display: block;
            opacity: 1;
        }
        .sidebar {
            position: fixed;
            top: var(--topbar-height);
            left: 0;
            width: var(--sidebar-width);
            bottom: 0;
            background: #0D1117;
            border-right: 1px solid var(--border-color);
            z-index: 999;
            overflow-y: auto;
            padding: 20px 12px 40px;
            transition: transform 0.3s ease;
        }
        .sidebar-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-list li {
            margin-bottom: 2px;
        }
        .sidebar-list a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 12px;
            border-radius: var(--radius-btn);
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 400;
            line-height: 1.5;
            transition: all 0.2s ease;
            border-left: 2px solid transparent;
        }
        .sidebar-list a:hover {
            color: var(--text-primary);
            background: var(--surface);
        }
        .sidebar-list a.active {
            color: var(--primary);
            background: rgba(139, 92, 246, 0.12);
            border-left: 2px solid var(--secondary);
            font-weight: 600;
        }
        .section-index {
            font-size: 11px;
            font-weight: 700;
            color: var(--text-muted);
            min-width: 20px;
            text-align: center;
            font-family: 'Inter', sans-serif;
        }
        .sidebar-list a.active .section-index {
            color: var(--primary);
        }

        /* Main content */
        .main-content {
            margin-left: var(--sidebar-width);
            padding-top: var(--topbar-height);
            min-height: 100vh;
        }

        /* Footer */
        .site-footer {
            background: #0D1117;
            border-top: 1px solid var(--border-color);
            padding: 48px 0 24px;
            margin-left: var(--sidebar-width);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand {
            font-size: 18px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
        }
        .footer-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 280px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: 0.01em;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }
        .footer-col ul li a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 16px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Category page specific */
        .category-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .category-breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.2s ease;
        }
        .category-breadcrumb a:hover {
            color: var(--primary);
        }
        .category-breadcrumb .separator {
            color: var(--text-muted);
        }
        .category-breadcrumb .current {
            color: var(--primary);
            font-weight: 500;
        }
        .category-h1 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 12px;
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }
        .category-intro {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 840px;
        }

        .filter-toolbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 12px 16px;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
        }
        .filter-tags {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .filter-tag {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            border-radius: 9999px;
            font-size: 13px;
            font-weight: 500;
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            cursor: pointer;
            transition: all 0.2s ease;
            background: transparent;
        }
        .filter-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(139, 92, 246, 0.08);
        }
        .filter-tag.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        .filter-sort {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .filter-sort label {
            font-size: 13px;
            color: var(--text-muted);
            white-space: nowrap;
        }
        .filter-sort select {
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            color: var(--text-secondary);
            font-size: 13px;
            padding: 6px 10px;
            cursor: pointer;
            transition: border-color 0.2s ease;
            height: 36px;
        }
        .filter-sort select:hover {
            border-color: var(--primary);
        }

        .guide-card {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all 0.2s ease;
            display: flex;
            flex-direction: column;
        }
        .guide-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow-purple);
            transform: translateY(-4px);
        }
        .guide-card-image {
            width: 100%;
            aspect-ratio: 16/9;
            overflow: hidden;
            position: relative;
            background: var(--bg-secondary);
        }
        .guide-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }
        .guide-card:hover .guide-card-image img {
            transform: scale(1.04);
        }
        .guide-card-image .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            display: inline-flex;
            align-items: center;
            padding: 3px 10px;
            border-radius: 9999px;
            font-size: 11px;
            font-weight: 600;
            background: rgba(10, 14, 23, 0.85);
            border: 1px solid rgba(139, 92, 246, 0.5);
            color: var(--primary);
            backdrop-filter: blur(4px);
        }
        .guide-card-body {
            padding: 16px 18px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .guide-card-title {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.45;
            color: var(--text-primary);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .guide-card-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .guide-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--border-color);
        }
        .guide-card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .guide-card-meta .meta-tag {
            color: var(--secondary);
            font-weight: 500;
        }

        .hot-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 14px 16px;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            transition: all 0.2s ease;
            cursor: default;
        }
        .hot-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow-cyan);
        }
        .hot-item-index {
            font-size: 24px;
            font-weight: 800;
            font-family: 'Inter', sans-serif;
            color: var(--text-muted);
            min-width: 36px;
            line-height: 1;
            padding-top: 2px;
        }
        .hot-item-index.top {
            color: var(--gold);
        }
        .hot-item-content {
            flex: 1;
        }
        .hot-item-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.5;
            margin-bottom: 4px;
        }
        .hot-item-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag-cloud .tag {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            border-radius: var(--radius-btn);
            font-size: 13px;
            font-weight: 500;
            background: var(--surface);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            transition: all 0.2s ease;
            cursor: default;
        }
        .tag-cloud .tag:hover {
            border-color: var(--secondary);
            color: var(--secondary);
            background: rgba(34, 211, 238, 0.06);
        }
        .tag-cloud .tag.highlight {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(139, 92, 246, 0.1);
            font-weight: 600;
        }

        .snapshot-bar {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            padding: 20px;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-metric);
        }
        .snapshot-item {
            text-align: center;
            padding: 12px 8px;
        }
        .snapshot-value {
            font-size: 28px;
            font-weight: 800;
            font-family: 'Inter', sans-serif;
            color: var(--text-primary);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .snapshot-value.accent {
            color: var(--accent);
        }
        .snapshot-value.primary {
            color: var(--primary);
        }
        .snapshot-value.secondary {
            color: var(--secondary);
        }
        .snapshot-value.gold {
            color: var(--gold);
        }
        .snapshot-label {
            font-size: 13px;
            color: var(--text-muted);
        }

        .cta-panel {
            background: linear-gradient(135deg, rgba(139, 92, 246, 0.12) 0%, rgba(34, 211, 238, 0.08) 50%, rgba(245, 158, 11, 0.06) 100%);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }
        .cta-panel h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
            letter-spacing: -0.01em;
        }
        .cta-panel p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #0A0E17;
            font-weight: 600;
            border-radius: var(--radius-btn);
            padding: 10px 20px;
            font-size: 14px;
            transition: all 0.2s ease;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary:hover {
            background: var(--gold);
            box-shadow: var(--shadow-glow-accent);
            color: #0A0E17;
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
            font-weight: 500;
            border-radius: var(--radius-btn);
            padding: 10px 20px;
            font-size: 14px;
            transition: all 0.2s ease;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-outline:hover {
            background: rgba(139, 92, 246, 0.12);
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: var(--shadow-glow-purple);
        }
        .btn-outline:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .editor-card {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 16px;
            display: flex;
            align-items: flex-start;
            gap: 12px;
            transition: all 0.2s ease;
        }
        .editor-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow-purple);
        }
        .editor-card-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-btn);
            background: rgba(139, 92, 246, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 18px;
            flex-shrink: 0;
        }
        .editor-card-content {
            flex: 1;
        }
        .editor-card-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
            line-height: 1.45;
        }
        .editor-card-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .section-block {
            padding: 16px 0;
        }
        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            margin-bottom: 8px;
            line-height: 1.3;
        }
        .section-title .title-icon {
            color: var(--primary);
            margin-right: 8px;
        }
        .section-subtitle {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            line-height: 1.6;
        }

        /* Mobile sidebar */
        .sidebar-close-btn {
            display: none;
            position: absolute;
            top: 12px;
            right: 12px;
            width: 32px;
            height: 32px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--border-color);
            background: var(--surface);
            color: var(--text-secondary);
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 14px;
            transition: all 0.2s ease;
        }
        .sidebar-close-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .topbar-nav {
                display: none;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .sidebar {
                transform: translateX(-100%);
                width: 280px;
                z-index: 999;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-close-btn {
                display: flex;
            }
            .main-content {
                margin-left: 0;
            }
            .site-footer {
                margin-left: 0;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .snapshot-bar {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-h1 {
                font-size: 30px;
            }
        }

        @media (max-width: 768px) {
            .topbar-search {
                display: none;
            }
            .topbar-inner {
                padding: 0 12px;
                gap: 8px;
            }
            .topbar-logo {
                font-size: 17px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
            .topbar-select {
                font-size: 12px;
                padding: 4px 8px;
                height: 32px;
            }
            .topbar-lang-btn {
                font-size: 12px;
                padding: 4px 8px;
                height: 32px;
            }
            .main-content {
                padding-top: var(--topbar-height);
            }
            .category-h1 {
                font-size: 26px;
            }
            .section-title {
                font-size: 22px;
            }
            .filter-toolbar {
                flex-direction: column;
                align-items: flex-start;
            }
            .filter-sort {
                width: 100%;
                justify-content: space-between;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .cta-panel {
                flex-direction: column;
                align-items: flex-start;
                padding: 24px 20px;
            }
            .snapshot-bar {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
                padding: 14px;
            }
            .snapshot-value {
                font-size: 22px;
            }
            .guide-card-title {
                font-size: 15px;
            }
            .topbar-right {
                gap: 6px;
            }
        }

        @media (max-width: 520px) {
            .topbar-inner {
                padding: 0 10px;
            }
            .topbar-logo {
                font-size: 15px;
            }
            .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 13px;
            }
            .topbar-select {
                font-size: 11px;
                padding: 3px 6px;
                height: 28px;
            }
            .topbar-lang-btn {
                font-size: 11px;
                padding: 3px 6px;
                height: 28px;
            }
            .mobile-menu-btn {
                width: 32px;
                height: 32px;
                font-size: 14px;
            }
            .category-h1 {
                font-size: 22px;
            }
            .section-title {
                font-size: 20px;
            }
            .snapshot-bar {
                grid-template-columns: 1fr 1fr;
            }
            .snapshot-value {
                font-size: 20px;
            }
            .container-custom {
                padding-left: 12px;
                padding-right: 12px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0A0E17;
            --bg-secondary: #111827;
            --surface: #1A2234;
            --surface-hover: #1F2937;
            --primary: #8B5CF6;
            --secondary: #22D3EE;
            --accent: #F59E0B;
            --gold: #FBBF24;
            --success: #10B981;
            --danger: #EF4444;
            --text-primary: #F3F4F6;
            --text-secondary: #9CA3AF;
            --text-muted: #6B7280;
            --border-color: #2D3748;
            --shadow-glow-purple: 0 0 20px rgba(139, 92, 246, 0.3);
            --shadow-glow-cyan: 0 0 20px rgba(34, 211, 238, 0.25);
            --shadow-glow-accent: 0 0 20px rgba(245, 158, 11, 0.3);
            --radius-sm: 8px;
            --radius-lg: 12px;
            --radius-btn: 6px;
            --radius-metric: 10px;
            --sidebar-width: 260px;
            --topbar-height: 64px;
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            font-size: 15px;
            font-weight: 400;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:hover {
            color: var(--secondary);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

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

        button {
            cursor: pointer;
            border: none;
            outline: none;
            background: none;
        }

        input:focus,
        select:focus,
        textarea:focus {
            outline: none;
            border-color: var(--primary) !important;
            box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2) !important;
        }

        .container-custom {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }

        @media (max-width: 1024px) {
            .container-custom {
                padding-left: 24px;
                padding-right: 24px;
            }
        }

        @media (max-width: 768px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                padding-left: 12px;
                padding-right: 12px;
            }
        }

        /* Topbar */
        .topbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--topbar-height);
            z-index: 1000;
            background: var(--bg-primary);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
        }

        .topbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            height: 100%;
            padding: 0 20px;
            gap: 16px;
        }

        .topbar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }

        .topbar-logo a {
            color: var(--text-primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .topbar-logo a:hover {
            color: var(--primary);
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-btn);
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            flex-shrink: 0;
            box-shadow: var(--shadow-glow-purple);
        }

        .topbar-search {
            flex: 1;
            max-width: 320px;
            min-width: 160px;
            position: relative;
        }

        .topbar-search input {
            width: 100%;
            height: 40px;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            padding: 8px 16px 8px 40px;
            color: var(--text-primary);
            font-size: 14px;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .topbar-search input:focus {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow-purple);
        }

        .topbar-search .search-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 14px;
            pointer-events: none;
        }

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

        .topbar-select {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            color: var(--text-secondary);
            font-size: 13px;
            padding: 6px 10px;
            cursor: pointer;
            transition: border-color 0.2s ease;
            height: 36px;
        }

        .topbar-select:hover {
            border-color: var(--primary);
        }

        .topbar-lang-btn {
            height: 36px;
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            padding: 0 12px;
            color: var(--text-secondary);
            font-size: 13px;
            cursor: pointer;
            transition: border-color 0.2s ease;
        }

        .topbar-lang-btn:hover {
            border-color: var(--primary);
            color: var(--text-primary);
        }

        .mobile-menu-toggle {
            display: none;
            height: 36px;
            width: 36px;
            align-items: center;
            justify-content: center;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            color: var(--text-secondary);
            font-size: 16px;
            cursor: pointer;
            transition: border-color 0.2s ease, color 0.2s ease;
            flex-shrink: 0;
        }

        .mobile-menu-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .mobile-search-toggle {
            display: none;
            height: 36px;
            width: 36px;
            align-items: center;
            justify-content: center;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            color: var(--text-secondary);
            font-size: 14px;
            cursor: pointer;
            transition: border-color 0.2s ease, color 0.2s ease;
            flex-shrink: 0;
        }

        .mobile-search-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Sidebar */
        .sidebar {
            position: fixed;
            top: var(--topbar-height);
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background: #0D1117;
            border-right: 1px solid var(--border-color);
            z-index: 999;
            overflow-y: auto;
            padding: 20px 12px 32px 12px;
            transition: transform 0.3s ease;
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .sidebar-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .sidebar-list li a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 12px;
            border-radius: var(--radius-btn);
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.5;
            text-decoration: none;
            transition: background 0.2s ease, color 0.2s ease, border-left 0.2s ease;
            border-left: 2px solid transparent;
            font-weight: 400;
            min-height: 40px;
        }

        .sidebar-list li a:hover {
            background: var(--surface);
            color: var(--text-primary);
        }

        .sidebar-list li a.active {
            background: rgba(139, 92, 246, 0.12);
            color: var(--primary);
            border-left: 2px solid var(--secondary);
            font-weight: 500;
        }

        .section-index {
            font-size: 11px;
            font-weight: 700;
            color: var(--text-muted);
            letter-spacing: 0.04em;
            flex-shrink: 0;
            min-width: 22px;
            font-family: 'Inter', 'PingFang SC', sans-serif;
        }

        .sidebar-list li a.active .section-index {
            color: var(--primary);
        }

        /* Main content */
        .main-content {
            margin-left: var(--sidebar-width);
            padding-top: var(--topbar-height);
            min-height: 100vh;
        }

        /* Sidebar overlay for mobile */
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 998;
        }

        .sidebar-overlay.active {
            display: block;
        }

        /* Section styles */
        .section-block {
            padding-top: 64px;
            padding-bottom: 64px;
        }

        .section-block-alt {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .section-heading {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
            color: var(--text-primary);
            margin-bottom: 12px;
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 720px;
            margin-bottom: 28px;
        }

        .section-heading-row {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            color: var(--secondary);
            background: rgba(34, 211, 238, 0.08);
            padding: 4px 12px;
            border-radius: 999px;
            border: 1px solid rgba(34, 211, 238, 0.2);
            margin-bottom: 10px;
            letter-spacing: 0.02em;
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

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

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

        .breadcrumb .current {
            color: var(--text-primary);
            font-weight: 500;
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #0A0E17;
            font-weight: 600;
            border-radius: var(--radius-btn);
            padding: 10px 20px;
            font-size: 14px;
            line-height: 1.5;
            text-decoration: none;
            transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
            box-shadow: 0 0 0 1px rgba(245, 158, 11, 0.2);
        }

        .btn-primary:hover {
            background: var(--gold);
            color: #0A0E17;
            box-shadow: var(--shadow-glow-accent);
            transform: translateY(-1px);
        }

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

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
            font-weight: 500;
            border-radius: var(--radius-btn);
            padding: 9px 18px;
            font-size: 14px;
            line-height: 1.5;
            text-decoration: none;
            transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
        }

        .btn-outline:hover {
            background: rgba(139, 92, 246, 0.12);
            border-color: var(--secondary);
            color: var(--secondary);
        }

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

        /* Cards */
        .player-card {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
            height: 100%;
            position: relative;
            overflow: hidden;
        }

        .player-card:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow-purple);
        }

        .player-card:hover::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--primary);
            border-radius: var(--radius-sm) var(--radius-sm) 0 0;
        }

        .player-card .card-image {
            width: 100%;
            aspect-ratio: 16/9;
            border-radius: 6px;
            overflow: hidden;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            flex-shrink: 0;
        }

        .player-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

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

        .player-card .card-title {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.5;
            color: var(--text-primary);
            margin: 0;
        }

        .player-card .card-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
            flex: 1;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            font-size: 12px;
            color: var(--text-muted);
            border-top: 1px solid var(--border-color);
            padding-top: 12px;
        }

        .card-meta .meta-tag {
            background: rgba(139, 92, 246, 0.12);
            color: var(--primary);
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 500;
        }

        .card-meta .meta-date {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* Hot pick cards */
        .hot-pick-card {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 14px 16px;
            display: flex;
            align-items: center;
            gap: 14px;
            transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
            text-decoration: none;
            color: var(--text-primary);
        }

        .hot-pick-card:hover {
            border-color: var(--secondary);
            box-shadow: var(--shadow-glow-cyan);
            transform: translateY(-2px);
            color: var(--text-primary);
        }

        .hot-pick-card .hot-index {
            font-size: 20px;
            font-weight: 700;
            color: var(--gold);
            font-family: 'Inter', sans-serif;
            flex-shrink: 0;
            min-width: 36px;
        }

        .hot-pick-card .hot-info {
            flex: 1;
            min-width: 0;
        }

        .hot-pick-card .hot-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 2px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .hot-pick-card .hot-summary {
            font-size: 12px;
            color: var(--text-muted);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* Tag cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-cloud .tag-item {
            background: var(--surface);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 13px;
            cursor: default;
            transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
            user-select: none;
        }

        .tag-cloud .tag-item:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(139, 92, 246, 0.08);
        }

        /* Filter toolbar */
        .filter-toolbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 14px 16px;
        }

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

        .filter-tag {
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            padding: 5px 14px;
            border-radius: 999px;
            font-size: 13px;
            cursor: pointer;
            transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
            white-space: nowrap;
        }

        .filter-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .filter-tag.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            font-weight: 500;
        }

        .filter-sort {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-secondary);
            flex-shrink: 0;
        }

        .filter-sort select {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            color: var(--text-secondary);
            font-size: 13px;
            padding: 5px 10px;
            cursor: pointer;
        }

        /* Data snapshot */
        .data-snapshot-bar {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-metric);
            padding: 20px 24px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 16px;
        }

        .snapshot-item {
            text-align: center;
            padding: 12px 8px;
            background: var(--bg-secondary);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
        }

        .snapshot-value {
            font-size: 24px;
            font-weight: 800;
            font-family: 'Inter', sans-serif;
            color: var(--secondary);
            line-height: 1.2;
        }

        .snapshot-value.accent {
            color: var(--accent);
        }

        .snapshot-value.gold-num {
            color: var(--gold);
        }

        .snapshot-label {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* CTA section */
        .cta-box {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
        }

        .cta-title {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
            font-family: 'Inter', 'PingFang SC', sans-serif;
        }

        .cta-text {
            font-size: 14px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 20px;
            line-height: 1.7;
        }

        /* Editor picks */
        .editor-pick-card {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 16px;
            display: flex;
            gap: 14px;
            align-items: flex-start;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .editor-pick-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow-purple);
        }

        .editor-pick-card .editor-icon {
            width: 40px;
            height: 40px;
            border-radius: 6px;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--gold);
            font-size: 16px;
            flex-shrink: 0;
        }

        .editor-pick-card .editor-content {
            flex: 1;
            min-width: 0;
        }

        .editor-pick-card .editor-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .editor-pick-card .editor-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Footer */
        .site-footer {
            background: #0D1117;
            border-top: 1px solid var(--border-color);
            padding: 48px 0 24px 0;
            margin-left: var(--sidebar-width);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
        }

        .footer-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 280px;
            margin: 0;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

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

        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-secondary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        .footer-col ul li a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 18px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 12px;
            color: var(--text-muted);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
                width: 280px;
                z-index: 1001;
            }

            .sidebar.open {
                transform: translateX(0);
                box-shadow: 8px 0 30px rgba(0, 0, 0, 0.5);
            }

            .sidebar-overlay.active {
                display: block;
            }

            .main-content {
                margin-left: 0;
            }

            .site-footer {
                margin-left: 0;
            }

            .topbar-search {
                display: none;
            }

            .topbar-search.mobile-open {
                display: block;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--bg-primary);
                padding: 12px 16px;
                border-bottom: 1px solid var(--border-color);
                max-width: none;
                z-index: 1002;
            }

            .topbar-search.mobile-open input {
                width: 100%;
            }

            .mobile-search-toggle {
                display: flex;
            }

            .mobile-menu-toggle {
                display: flex;
            }

            .topbar-right .topbar-select,
            .topbar-right .topbar-lang-btn {
                display: none;
            }

            .section-heading {
                font-size: 22px;
            }

            .section-block {
                padding-top: 40px;
                padding-bottom: 40px;
            }

            .filter-toolbar {
                flex-direction: column;
                align-items: stretch;
            }

            .filter-sort {
                justify-content: flex-end;
            }

            .data-snapshot-bar {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }

            .cta-box {
                padding: 28px 18px;
            }

            .cta-title {
                font-size: 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .topbar-logo {
                font-size: 17px;
            }

            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 14px;
            }

            .topbar-inner {
                padding: 0 12px;
                gap: 8px;
            }

            .btn-primary,
            .btn-outline {
                padding: 8px 16px;
                font-size: 13px;
            }

            .player-card {
                padding: 16px;
            }

            .section-heading {
                font-size: 20px;
            }

            .data-snapshot-bar {
                grid-template-columns: 1fr 1fr;
                padding: 14px;
            }

            .snapshot-value {
                font-size: 20px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #0A0E17;
            --bg-secondary: #111827;
            --surface: #1A2234;
            --surface-hover: #1F2937;
            --primary: #8B5CF6;
            --secondary: #22D3EE;
            --accent: #F59E0B;
            --gold: #FBBF24;
            --success: #10B981;
            --danger: #EF4444;
            --text-primary: #F3F4F6;
            --text-secondary: #9CA3AF;
            --text-muted: #6B7280;
            --border-color: #2D3748;
            --shadow-glow-purple: 0 0 20px rgba(139, 92, 246, 0.3);
            --shadow-glow-cyan: 0 0 20px rgba(34, 211, 238, 0.25);
            --shadow-glow-accent: 0 0 20px rgba(245, 158, 11, 0.3);
            --radius-sm: 8px;
            --radius-lg: 12px;
            --radius-btn: 6px;
            --radius-metric: 10px;
            --sidebar-width: 260px;
            --topbar-height: 64px;
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            font-size: 15px;
            font-weight: 400;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            min-height: 100vh;
            overflow-x: hidden;
            padding-top: var(--topbar-height);
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--secondary);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            outline: none;
            background: none;
        }
        input:focus, select:focus, textarea:focus {
            outline: none;
            border-color: var(--primary) !important;
            box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2) !important;
        }

        .container-custom {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }

        /* Topbar */
        .topbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--topbar-height);
            z-index: 1000;
            background: var(--bg-primary);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
        }
        .topbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            height: 100%;
            padding: 0 20px;
            gap: 16px;
        }
        .topbar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }
        .topbar-logo a {
            color: var(--text-primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .topbar-logo a:hover {
            color: var(--primary);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-btn);
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            flex-shrink: 0;
        }
        .topbar-search {
            flex: 1;
            max-width: 320px;
            min-width: 160px;
            position: relative;
        }
        .topbar-search input {
            width: 100%;
            height: 40px;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            padding: 8px 16px 8px 40px;
            color: var(--text-primary);
            font-size: 14px;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }
        .topbar-search input:focus {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow-purple);
        }
        .topbar-search .search-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 14px;
            pointer-events: none;
        }
        .topbar-right {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .topbar-select {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            color: var(--text-secondary);
            font-size: 13px;
            padding: 6px 10px;
            cursor: pointer;
            transition: border-color 0.2s ease;
            height: 36px;
        }
        .topbar-select:hover {
            border-color: var(--primary);
        }
        .topbar-lang-btn {
            height: 36px;
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            padding: 0 10px;
            color: var(--text-secondary);
            font-size: 13px;
            transition: border-color 0.2s ease, color 0.2s ease;
        }
        .topbar-lang-btn:hover {
            border-color: var(--primary);
            color: var(--text-primary);
        }
        .mobile-menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--border-color);
            background: var(--surface);
            color: var(--text-primary);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        /* Sidebar */
        .sidebar {
            position: fixed;
            top: var(--topbar-height);
            left: 0;
            width: var(--sidebar-width);
            height: calc(100vh - var(--topbar-height));
            background: #0D1117;
            border-right: 1px solid var(--border-color);
            overflow-y: auto;
            z-index: 900;
            padding: 20px 14px;
            transition: transform 0.3s ease;
        }
        .sidebar-title {
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--text-muted);
            margin-bottom: 14px;
            padding-left: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .sidebar-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-list li {
            margin-bottom: 2px;
        }
        .sidebar-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 12px;
            border-radius: var(--radius-btn);
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.4;
            border-left: 2px solid transparent;
            transition: all 0.2s ease;
            text-decoration: none;
        }
        .sidebar-list a:hover {
            background: rgba(139, 92, 246, 0.08);
            color: var(--text-primary);
            border-left-color: var(--secondary);
        }
        .sidebar-list a.active {
            background: rgba(139, 92, 246, 0.15);
            color: var(--primary);
            border-left-color: var(--secondary);
            font-weight: 600;
        }
        .section-index {
            font-size: 11px;
            font-weight: 700;
            color: var(--text-muted);
            min-width: 20px;
            text-align: right;
        }
        .sidebar-list a.active .section-index {
            color: var(--primary);
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: var(--topbar-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0,0,0,0.6);
            z-index: 850;
        }

        /* Main content area */
        .main-content {
            margin-left: var(--sidebar-width);
            padding: 32px 40px 0;
            min-height: calc(100vh - var(--topbar-height));
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .separator {
            color: var(--text-muted);
        }
        .breadcrumb .current {
            color: var(--text-primary);
            font-weight: 500;
        }

        /* Category header */
        .category-header {
            padding: 28px 32px;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            margin-bottom: 28px;
            position: relative;
            overflow: hidden;
        }
        .category-header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
        }
        .category-header h1 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }
        .category-header .cat-desc {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 800px;
        }

        /* Filter toolbar */
        .filter-toolbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding: 16px 20px;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            margin-bottom: 28px;
        }
        .filter-tags {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .filter-tag {
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            transition: all 0.2s ease;
            cursor: pointer;
            white-space: nowrap;
        }
        .filter-tag:hover {
            border-color: var(--primary);
            color: var(--text-primary);
        }
        .filter-tag.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .sort-select-wrap {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .sort-select-wrap label {
            font-size: 13px;
            color: var(--text-muted);
            white-space: nowrap;
        }
        .sort-select {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            color: var(--text-secondary);
            font-size: 13px;
            padding: 6px 12px;
            cursor: pointer;
            transition: border-color 0.2s ease;
            height: 36px;
            min-width: 120px;
        }
        .sort-select:hover {
            border-color: var(--primary);
        }

        /* Gear cards grid */
        .gear-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-bottom: 28px;
        }
        .gear-card {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all 0.2s ease;
            display: flex;
            flex-direction: column;
        }
        .gear-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow-purple);
            transform: translateY(-4px);
        }
        .gear-card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-color);
        }
        .gear-card-body {
            padding: 18px 18px 16px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .gear-card-title {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .gear-card-desc {
            font-size: 13px;
            line-height: 1.6;
            color: var(--text-secondary);
            flex: 1;
            margin-bottom: 12px;
        }
        .gear-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-muted);
            border-top: 1px solid var(--border-color);
            padding-top: 10px;
        }
        .gear-card-tag {
            padding: 3px 10px;
            border-radius: 4px;
            font-size: 11px;
            font-weight: 600;
            background: rgba(34, 211, 238, 0.12);
            color: var(--secondary);
            white-space: nowrap;
        }
        .gear-card-rating {
            display: flex;
            align-items: center;
            gap: 4px;
            color: var(--gold);
            font-size: 12px;
        }

        /* Show more button */
        .show-more-wrap {
            display: flex;
            justify-content: center;
            margin-bottom: 32px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--primary);
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            transition: all 0.2s ease;
            text-decoration: none;
        }
        .btn-outline:hover {
            background: rgba(139, 92, 246, 0.12);
            border-color: var(--secondary);
            color: var(--secondary);
        }

        /* Hot picks section */
        .section-block {
            margin-bottom: 32px;
        }
        .section-heading {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 16px;
            flex-wrap: wrap;
            gap: 8px;
        }
        .section-heading h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .section-heading h2 .heading-icon {
            color: var(--primary);
            font-size: 18px;
        }
        .hot-picks-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 14px;
        }
        .hot-pick-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 14px;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: all 0.2s ease;
        }
        .hot-pick-card:hover {
            border-color: var(--secondary);
            box-shadow: var(--shadow-glow-cyan);
        }
        .hot-pick-card img {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-btn);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--surface);
        }
        .hot-pick-info h3 {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 2px;
            line-height: 1.3;
        }
        .hot-pick-info p {
            font-size: 11px;
            color: var(--text-muted);
            line-height: 1.4;
        }

        /* Tag cloud */
        .tag-cloud {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            padding: 16px 20px;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
        }
        .tag-cloud .tag-item {
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--surface);
            border: 1px solid var(--border-color);
            transition: all 0.2s ease;
            cursor: default;
            white-space: nowrap;
        }
        .tag-cloud .tag-item:hover {
            border-color: var(--primary);
            color: var(--text-primary);
        }

        /* Weekly data snapshot */
        .data-snapshot {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px 28px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-bottom: 32px;
        }
        .data-item {
            text-align: center;
            padding: 12px 8px;
            border-radius: var(--radius-sm);
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            transition: all 0.2s ease;
        }
        .data-item:hover {
            border-color: var(--primary);
        }
        .data-item .data-value {
            font-size: 28px;
            font-weight: 800;
            color: var(--accent);
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .data-item .data-label {
            font-size: 12px;
            color: var(--text-secondary);
            margin-bottom: 2px;
        }
        .data-item .data-sub {
            font-size: 11px;
            color: var(--text-muted);
        }

        /* CTA section */
        .gear-cta {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 32px;
            position: relative;
            overflow: hidden;
        }
        .gear-cta::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(139,92,246,0.15), transparent 70%);
            pointer-events: none;
        }
        .gear-cta h2 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .gear-cta p {
            font-size: 14px;
            color: var(--text-secondary);
            max-width: 520px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            background: var(--accent);
            color: #0A0E17;
            font-size: 14px;
            font-weight: 600;
            transition: all 0.2s ease;
            text-decoration: none;
            flex-shrink: 0;
        }
        .btn-primary:hover {
            background: var(--gold);
            box-shadow: var(--shadow-glow-accent);
            color: #0A0E17;
        }

        /* Editor picks */
        .editor-picks-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .editor-pick-card {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 18px;
            display: flex;
            gap: 14px;
            align-items: flex-start;
            transition: all 0.2s ease;
        }
        .editor-pick-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow-purple);
        }
        .editor-pick-card img {
            width: 64px;
            height: 64px;
            border-radius: var(--radius-btn);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg-secondary);
        }
        .editor-pick-info h3 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
            line-height: 1.4;
        }
        .editor-pick-info p {
            font-size: 12px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* Footer */
        .site-footer {
            background: #0D1117;
            border-top: 1px solid var(--border-color);
            padding: 40px 0 20px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
        }
        .footer-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-secondary);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        .footer-col ul li a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 16px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 12px;
            color: var(--text-muted);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay.active {
                display: block;
            }
            .main-content {
                margin-left: 0;
                padding: 24px 20px 0;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .gear-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hot-picks-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .data-snapshot {
                grid-template-columns: repeat(2, 1fr);
            }
            .editor-picks-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 768px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .main-content {
                padding: 16px 14px 0;
            }
            .topbar-search {
                display: none;
            }
            .topbar-select {
                display: none;
            }
            .category-header {
                padding: 20px 18px;
            }
            .category-header h1 {
                font-size: 26px;
            }
            .gear-grid {
                grid-template-columns: 1fr;
            }
            .hot-picks-grid {
                grid-template-columns: 1fr;
            }
            .editor-picks-grid {
                grid-template-columns: 1fr;
            }
            .filter-toolbar {
                flex-direction: column;
                align-items: flex-start;
            }
            .data-snapshot {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
                padding: 16px;
            }
            .gear-cta {
                flex-direction: column;
                align-items: flex-start;
                padding: 20px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                padding-left: 12px;
                padding-right: 12px;
            }
            .main-content {
                padding: 12px 10px 0;
            }
            .category-header h1 {
                font-size: 22px;
            }
            .data-snapshot {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .topbar-logo {
                font-size: 17px;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 15px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

/* roulang page: category5 */
:root {
            --bg-primary: #0A0E17;
            --bg-secondary: #111827;
            --surface: #1A2234;
            --surface-hover: #1F2937;
            --primary: #8B5CF6;
            --secondary: #22D3EE;
            --accent: #F59E0B;
            --gold: #FBBF24;
            --success: #10B981;
            --danger: #EF4444;
            --text-primary: #F3F4F6;
            --text-secondary: #9CA3AF;
            --text-muted: #6B7280;
            --border-color: #2D3748;
            --shadow-glow-purple: 0 0 20px rgba(139, 92, 246, 0.3);
            --shadow-glow-cyan: 0 0 20px rgba(34, 211, 238, 0.25);
            --shadow-glow-accent: 0 0 20px rgba(245, 158, 11, 0.3);
            --radius-sm: 8px;
            --radius-lg: 12px;
            --radius-btn: 6px;
            --radius-metric: 10px;
            --sidebar-width: 260px;
            --topbar-height: 64px;
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            font-size: 15px;
            font-weight: 400;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            outline: none;
            background: none;
        }
        input:focus,
        select:focus,
        textarea:focus {
            outline: none;
            border-color: var(--primary) !important;
            box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2) !important;
        }

        .container-custom {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }

        /* Topbar */
        .topbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--topbar-height);
            z-index: 1000;
            background: var(--bg-primary);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
        }
        .topbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            height: 100%;
            padding: 0 20px;
            gap: 16px;
        }
        .topbar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }
        .topbar-logo a {
            color: var(--text-primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .topbar-logo a:hover {
            color: var(--primary);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-btn);
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            flex-shrink: 0;
        }
        .topbar-search {
            flex: 1;
            max-width: 320px;
            min-width: 160px;
            position: relative;
        }
        .topbar-search input {
            width: 100%;
            height: 40px;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            padding: 8px 16px 8px 40px;
            color: var(--text-primary);
            font-size: 14px;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }
        .topbar-search input:focus {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow-purple);
        }
        .topbar-search .search-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 14px;
            pointer-events: none;
        }
        .topbar-right {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .topbar-select {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            color: var(--text-secondary);
            font-size: 13px;
            padding: 6px 10px;
            cursor: pointer;
            transition: border-color 0.2s ease;
            height: 36px;
        }
        .topbar-select:hover {
            border-color: var(--primary);
        }
        .topbar-lang-btn {
            height: 36px;
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            padding: 6px 12px;
            color: var(--text-secondary);
            font-size: 13px;
            cursor: pointer;
            transition: background 0.2s ease;
        }
        .topbar-lang-btn:hover {
            background: var(--surface-hover);
            border-color: var(--primary);
        }

        /* Sidebar */
        .sidebar {
            position: fixed;
            top: var(--topbar-height);
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background: #0D1117;
            border-right: 1px solid var(--border-color);
            z-index: 900;
            overflow-y: auto;
            padding: 20px 16px;
            transition: transform 0.3s ease;
        }
        .sidebar-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-list li {
            margin-bottom: 4px;
        }
        .sidebar-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 14px;
            border-radius: var(--radius-btn);
            color: var(--text-secondary);
            font-size: 13.5px;
            line-height: 1.4;
            transition: all 0.2s ease;
            border-left: 2px solid transparent;
        }
        .sidebar-list a:hover {
            color: var(--text-primary);
            background: rgba(139, 92, 246, 0.08);
        }
        .sidebar-list a.active {
            color: var(--primary);
            background: rgba(139, 92, 246, 0.12);
            border-left: 2px solid var(--secondary);
        }
        .section-index {
            font-size: 11px;
            font-weight: 600;
            color: var(--text-muted);
            letter-spacing: 0.03em;
            min-width: 24px;
            font-family: 'Inter', sans-serif;
        }

        /* Main content */
        .main-content {
            padding-top: var(--topbar-height);
            margin-left: var(--sidebar-width);
            min-height: 100vh;
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color 0.2s ease;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .separator {
            color: var(--text-muted);
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--text-secondary);
        }

        /* Section base */
        .section-block {
            padding: 40px 0;
            border-bottom: 1px solid var(--border-color);
        }
        .section-block:last-child {
            border-bottom: none;
        }
        .section-title {
            font-size: 24px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
            color: var(--text-primary);
            margin-bottom: 8px;
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }
        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 24px;
        }

        /* Card base */
        .card {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all 0.2s ease;
            box-shadow: 0 0 0 rgba(139, 92, 246, 0);
        }
        .card:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow-purple);
        }
        .card-image {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--surface-hover);
            border-bottom: 1px solid var(--border-color);
        }
        .card-body {
            padding: 20px;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
            flex-wrap: wrap;
        }
        .card-title {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.5;
            color: var(--text-primary);
            margin-bottom: 8px;
            transition: color 0.2s ease;
        }
        .card-title:hover {
            color: var(--primary);
        }
        .card-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
        }

        /* Badge */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 3px 10px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
            line-height: 1.5;
            background: rgba(139, 92, 246, 0.15);
            color: var(--primary);
            border: 1px solid rgba(139, 92, 246, 0.3);
        }
        .badge-cyan {
            background: rgba(34, 211, 238, 0.12);
            color: var(--secondary);
            border-color: rgba(34, 211, 238, 0.3);
        }
        .badge-gold {
            background: rgba(251, 191, 36, 0.12);
            color: var(--gold);
            border-color: rgba(251, 191, 36, 0.3);
        }
        .badge-green {
            background: rgba(16, 185, 129, 0.12);
            color: var(--success);
            border-color: rgba(16, 185, 129, 0.3);
        }

        /* Filter chips */
        .filter-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--surface);
            border: 1px solid var(--border-color);
            cursor: pointer;
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .filter-chip:hover {
            border-color: var(--primary);
            color: var(--text-primary);
            background: var(--surface-hover);
        }
        .filter-chip.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: var(--shadow-glow-purple);
        }

        /* Button styles */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            transition: all 0.2s ease;
            cursor: pointer;
            text-decoration: none;
            line-height: 1.5;
        }
        .btn-primary {
            background: var(--accent);
            color: #0A0E17;
            box-shadow: 0 0 16px rgba(245, 158, 11, 0.2);
        }
        .btn-primary:hover {
            background: var(--gold);
            box-shadow: var(--shadow-glow-accent);
            color: #0A0E17;
        }
        .btn-outline {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline:hover {
            background: rgba(139, 92, 246, 0.12);
            border-color: var(--primary);
            color: var(--primary);
        }
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* Hot card */
        .hot-card {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 16px;
            border-radius: var(--radius-sm);
            background: var(--surface);
            border: 1px solid var(--border-color);
            transition: all 0.2s ease;
            margin-bottom: 12px;
        }
        .hot-card:hover {
            border-color: var(--primary);
            background: var(--surface-hover);
        }
        .hot-card-number {
            font-size: 28px;
            font-weight: 800;
            color: var(--gold);
            font-family: 'Inter', sans-serif;
            min-width: 40px;
            line-height: 1.2;
        }
        .hot-card-content {
            flex: 1;
        }
        .hot-card-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
            line-height: 1.5;
        }
        .hot-card-meta {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Tag cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-item {
            padding: 6px 14px;
            border-radius: 16px;
            font-size: 13px;
            color: var(--text-secondary);
            background: var(--surface);
            border: 1px solid var(--border-color);
            cursor: default;
            transition: all 0.2s ease;
        }
        .tag-item:hover {
            border-color: var(--secondary);
            color: var(--secondary);
        }

        /* Data snapshot */
        .stat-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            border-bottom: 1px solid rgba(45, 55, 72, 0.6);
        }
        .stat-row:last-child {
            border-bottom: none;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
        }
        .stat-value {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            font-family: 'Inter', sans-serif;
        }
        .stat-value.highlight {
            color: var(--accent);
        }

        /* CTA */
        .cta-banner {
            background: var(--surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px;
            text-align: center;
        }
        .cta-title {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .cta-text {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

        /* Footer */
        .site-footer {
            background: #0D1117;
            border-top: 1px solid var(--border-color);
            padding: 48px 0 24px;
            margin-left: var(--sidebar-width);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand {
            font-size: 18px;
            font-weight: 800;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            margin-bottom: 12px;
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }
        .footer-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul a {
            font-size: 13px;
            color: var(--text-muted);
            transition: color 0.2s ease;
        }
        .footer-col ul a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 16px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 8px;
        }

        /* Mobile drawer */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 850;
        }
        .sidebar-overlay.active {
            display: block;
        }
        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-btn);
            background: var(--surface);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            font-size: 18px;
            flex-shrink: 0;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .container-custom {
                padding-left: 24px;
                padding-right: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
            }
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
                z-index: 950;
                transition: transform 0.3s ease;
            }
            .sidebar.active {
                transform: translateX(0);
            }
            .sidebar-overlay {
                z-index: 900;
            }
            .sidebar-overlay.active {
                display: block;
            }
            .sidebar {
                z-index: 950;
            }
            .main-content,
            .site-footer {
                margin-left: 0;
            }
            .menu-toggle {
                display: flex;
            }
            .topbar-search {
                display: none;
            }
            .topbar-search.mobile-show {
                display: block;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                max-width: none;
                padding: 12px 16px;
                background: var(--bg-primary);
                border-bottom: 1px solid var(--border-color);
            }
            .topbar-select {
                font-size: 12px;
                padding: 6px 8px;
            }
            .topbar-logo {
                font-size: 17px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section-block {
                padding: 28px 0;
            }
            .section-title {
                font-size: 20px;
            }
            .card-image {
                height: 160px;
            }
            .cta-banner {
                padding: 24px 20px;
            }
            .cta-title {
                font-size: 19px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .hot-card {
                flex-direction: row;
                align-items: flex-start;
            }
            .stat-value {
                font-size: 16px;
            }
            .topbar-inner {
                padding: 0 12px;
                gap: 10px;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                padding-left: 12px;
                padding-right: 12px;
            }
            .topbar-logo {
                font-size: 15px;
            }
            .topbar-right {
                gap: 6px;
            }
            .topbar-lang-btn {
                padding: 6px 8px;
                font-size: 12px;
            }
            .topbar-lang-btn span {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .card-image {
                height: 140px;
            }
            .section-title {
                font-size: 18px;
            }
            .hot-card-number {
                font-size: 22px;
                min-width: 32px;
            }
            .filter-chip {
                font-size: 12px;
                padding: 6px 12px;
            }
            .btn {
                padding: 8px 16px;
                font-size: 13px;
            }
            .badge {
                font-size: 11px;
                padding: 2px 8px;
            }
        }