/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #00d4ff;
            --primary-dark: #00a8cc;
            --primary-light: #66e3ff;
            --secondary: #8b5cf6;
            --secondary-dark: #7c3aed;
            --accent: #00ff88;
            --accent-dark: #00cc6a;
            --bg-dark: #0a0e17;
            --bg-card: #111827;
            --bg-card-hover: #1a2438;
            --bg-nav: rgba(10, 14, 23, 0.95);
            --bg-input: #1a2236;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-color: #1e293b;
            --border-light: #334155;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-dark);
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }

        h1 {
            font-size: 3rem;
        }
        h2 {
            font-size: 2.2rem;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.2rem;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-wide {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Section spacing ===== */
        .section {
            padding: 80px 0;
        }
        .section-sm {
            padding: 48px 0;
        }
        .section-lg {
            padding: 120px 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 16px;
            font-size: 2.2rem;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .section-subtitle {
            text-align: center;
            color: var(--text-secondary);
            font-size: 1.1rem;
            max-width: 640px;
            margin: 0 auto 48px;
        }

        .section-divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 4px;
            margin: 16px auto 12px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            border: 2px solid transparent;
            text-decoration: none;
            cursor: pointer;
            line-height: 1.4;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #0a0e17;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            color: #0a0e17;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 212, 255, 0.3);
        }
        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-secondary:hover {
            background: rgba(0, 212, 255, 0.1);
            color: var(--primary-light);
            transform: translateY(-2px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }

        .btn-accent {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #0a0e17;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: linear-gradient(135deg, #00ff99, var(--accent));
            color: #0a0e17;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 255, 136, 0.3);
        }

        .btn-lg {
            padding: 16px 48px;
            font-size: 1.1rem;
            border-radius: var(--radius-lg);
        }

        .btn-sm {
            padding: 8px 20px;
            font-size: 0.875rem;
            border-radius: var(--radius-sm);
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            background: rgba(0, 212, 255, 0.12);
            color: var(--primary);
            border: 1px solid rgba(0, 212, 255, 0.2);
            transition: all var(--transition);
        }

        .badge-secondary {
            background: rgba(139, 92, 246, 0.12);
            color: var(--secondary);
            border-color: rgba(139, 92, 246, 0.2);
        }

        .badge-accent {
            background: rgba(0, 255, 136, 0.12);
            color: var(--accent);
            border-color: rgba(0, 255, 136, 0.2);
        }

        .badge:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 15px rgba(0, 212, 255, 0.15);
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 24px;
            transition: all var(--transition);
            overflow: hidden;
        }

        .card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md), var(--shadow-glow);
        }

        .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            border-radius: var(--radius-sm);
            margin-bottom: 16px;
        }

        .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .card-text {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text-muted);
            font-size: 0.85rem;
            margin-top: 12px;
        }

        /* ===== Grid Layouts ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }

        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .grid-auto {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--bg-nav);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(30, 41, 59, 0.6);
            height: var(--header-height);
            transition: all var(--transition);
        }

        .header-scrolled {
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 16px;
        }

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

        .header-logo .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #0a0e17;
            font-weight: 800;
        }

        .header-logo .logo-text {
            font-size: 1.35rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
        }

        /* Search Bar (visual center) */
        .header-search {
            flex: 1;
            max-width: 480px;
            margin: 0 16px;
            position: relative;
        }

        .header-search .search-input {
            width: 100%;
            padding: 10px 20px 10px 48px;
            border-radius: 50px;
            background: var(--bg-input);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            font-size: 0.95rem;
            transition: all var(--transition);
        }

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

        .header-search .search-input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.12);
            background: #1e2a40;
        }

        .header-search .search-icon {
            position: absolute;
            left: 18px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 0.95rem;
            pointer-events: none;
        }

        /* Nav Links */
        .header-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .header-nav a {
            padding: 8px 20px;
            border-radius: 50px;
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            text-decoration: none;
            position: relative;
        }

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

        .header-nav a.active {
            color: var(--primary);
            background: rgba(0, 212, 255, 0.1);
        }

        .header-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }

        /* Mobile Toggle */
        .mobile-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            font-size: 1.3rem;
            cursor: pointer;
            flex-shrink: 0;
            transition: all var(--transition);
        }

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

        /* ===== Hero Section ===== */
        .hero {
            min-height: 92vh;
            display: flex;
            align-items: center;
            position: relative;
            padding-top: var(--header-height);
            overflow: hidden;
            background: var(--bg-dark);
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.35;
            z-index: 0;
        }

        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 23, 0.92) 0%, rgba(10, 14, 23, 0.6) 60%, rgba(10, 14, 23, 0.92) 100%);
        }

        .hero-overlay-glow {
            position: absolute;
            top: -20%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 212, 255, 0.08), transparent 70%);
            border-radius: 50%;
            z-index: 0;
            pointer-events: none;
        }

        .hero-overlay-glow-2 {
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.08), transparent 70%);
            border-radius: 50%;
            z-index: 0;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
            padding: 40px 0;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 20px;
            border-radius: 50px;
            background: rgba(0, 212, 255, 0.1);
            border: 1px solid rgba(0, 212, 255, 0.2);
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }

        .hero-title {
            font-size: 3.8rem;
            font-weight: 900;
            line-height: 1.1;
            margin-bottom: 20px;
            letter-spacing: -1px;
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 1.2rem;
            color: var(--text-secondary);
            max-width: 600px;
            line-height: 1.8;
            margin-bottom: 36px;
        }

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

        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .hero-stat-item .stat-number {
            font-size: 2rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 2px;
        }

        /* ===== Features Section ===== */
        .features {
            background: linear-gradient(180deg, var(--bg-dark) 0%, #0d1225 100%);
        }

        .feature-card {
            text-align: center;
            padding: 36px 28px;
        }

        .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(139, 92, 246, 0.1));
            border: 1px solid rgba(0, 212, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            transition: all var(--transition);
        }

        .feature-card:hover .feature-icon {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(139, 92, 246, 0.2));
            transform: scale(1.05);
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.1);
        }

        /* ===== Category Section ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            min-height: 260px;
            display: flex;
            flex-direction: column;
        }

        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md), var(--shadow-glow);
            border-color: var(--border-light);
        }

        .category-card .cat-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .category-card:hover .cat-img {
            transform: scale(1.03);
        }

        .category-card .cat-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .category-card .cat-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .category-card .cat-desc {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
            margin-bottom: 12px;
            flex: 1;
        }

        /* ===== Latest Posts Section ===== */
        .posts-section {
            background: #0d1225;
        }

        .post-card {
            display: flex;
            flex-direction: column;
        }

        .post-card .card-img-wrap {
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 16px;
        }

        .post-card .card-img-wrap img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .post-card .post-category {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 8px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .post-card .post-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .post-card .post-excerpt {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .post-card .post-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            color: var(--text-muted);
            font-size: 0.8rem;
            margin-top: auto;
            padding-top: 12px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .empty-posts {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            font-size: 1.1rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-color);
        }

        /* ===== Stats / Numbers Section ===== */
        .stats-section {
            background: linear-gradient(135deg, #0a0e17 0%, #0d1225 50%, #0a0e17 100%);
            position: relative;
            overflow: hidden;
        }

        .stats-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 30% 50%, rgba(0, 212, 255, 0.03), transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(139, 92, 246, 0.03), transparent 50%);
            pointer-events: none;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
            z-index: 1;
        }

        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.02);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.04);
            transition: all var(--transition);
        }

        .stat-item:hover {
            background: rgba(255, 255, 255, 0.04);
            border-color: rgba(0, 212, 255, 0.1);
        }

        .stat-item .stat-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .stat-item .stat-number {
            font-size: 2.5rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .stat-item .stat-label {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-top: 4px;
        }

        /* ===== Process / Steps ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            position: relative;
        }

        .process-grid::before {
            content: '';
            position: absolute;
            top: 48px;
            left: 15%;
            right: 15%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
            opacity: 0.3;
            z-index: 0;
        }

        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 32px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }

        .process-step:hover {
            border-color: var(--border-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .process-step .step-number {
            width: 56px;
            height: 56px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 800;
            color: #0a0e17;
        }

        .process-step .step-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .process-step .step-desc {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            background: #0d1225;
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

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

        .faq-question {
            width: 100%;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            text-align: left;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-primary);
            background: none;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
        }

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

        .faq-question .faq-toggle {
            font-size: 1.2rem;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question .faq-toggle {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, #0a0e17 0%, #0d1225 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }

        .cta-box {
            position: relative;
            z-index: 1;
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), rgba(139, 92, 246, 0.05));
            border: 1px solid rgba(0, 212, 255, 0.12);
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            backdrop-filter: blur(8px);
        }

        .cta-box h2 {
            font-size: 2.2rem;
            margin-bottom: 16px;
        }

        .cta-box p {
            color: var(--text-secondary);
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 32px;
        }

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

        /* ===== Footer ===== */
        .footer {
            background: #070a12;
            border-top: 1px solid rgba(30, 41, 59, 0.4);
            padding: 48px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 1.4rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 12px;
            display: inline-block;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 20px;
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 1rem;
            transition: all var(--transition);
        }

        .footer-social a:hover {
            background: rgba(0, 212, 255, 0.1);
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }

        .footer h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: all var(--transition);
            text-decoration: none;
        }

        .footer-links a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom p {
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .footer-bottom-links {
            display: flex;
            gap: 20px;
        }

        .footer-bottom-links a {
            color: var(--text-muted);
            font-size: 0.85rem;
            text-decoration: none;
            transition: color var(--transition);
        }

        .footer-bottom-links a:hover {
            color: var(--primary);
        }

        /* ===== Back to Top ===== */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #0a0e17;
            border: none;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all var(--transition);
            box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
        }

        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .back-to-top:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 30px rgba(0, 212, 255, 0.4);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 3rem;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid::before {
                display: none;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }

            .header-search {
                display: none;
            }

            .header-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--bg-nav);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s ease;
                z-index: 999;
                box-shadow: var(--shadow-lg);
            }

            .header-nav.open {
                transform: translateY(0);
                opacity: 1;
            }

            .header-nav a {
                width: 100%;
                padding: 12px 20px;
                border-radius: var(--radius-sm);
            }

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

            .header-nav a.active {
                background: rgba(0, 212, 255, 0.08);
            }

            .mobile-toggle {
                display: flex;
            }

            .hero {
                min-height: 80vh;
            }

            .hero-title {
                font-size: 2.2rem;
            }

            .hero-desc {
                font-size: 1rem;
            }

            .hero-stats {
                gap: 24px;
                flex-wrap: wrap;
            }

            .hero-stat-item .stat-number {
                font-size: 1.5rem;
            }

            .section {
                padding: 56px 0;
            }
            .section-lg {
                padding: 72px 0;
            }

            .section-title {
                font-size: 1.7rem;
            }

            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .stat-item .stat-number {
                font-size: 2rem;
            }

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

            .cta-box {
                padding: 40px 24px;
            }

            .cta-box h2 {
                font-size: 1.6rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

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

            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .hero-title {
                font-size: 1.8rem;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

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

            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }

            .section-title {
                font-size: 1.4rem;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .stat-item {
                padding: 20px 12px;
            }

            .stat-item .stat-number {
                font-size: 1.6rem;
            }

            .cta-box {
                padding: 28px 16px;
            }

            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }

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

            .footer-grid {
                gap: 20px;
            }
        }

        /* ===== Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* ===== Selection ===== */
        ::selection {
            background: rgba(0, 212, 255, 0.25);
            color: #fff;
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }

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

        ::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 8px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--border-light);
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #00e5ff;
            --primary-dark: #00b8d4;
            --primary-light: #66f0ff;
            --secondary: #ff2d55;
            --secondary-dark: #d91a3e;
            --accent: #7c4dff;
            --bg-dark: #0a0e1a;
            --bg-card: #111827;
            --bg-elevated: #1a2236;
            --bg-input: #0f1524;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-color: #1e293b;
            --border-light: rgba(0, 229, 255, 0.15);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.6);
            --shadow-glow: 0 0 40px rgba(0, 229, 255, 0.08);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 4px;
            border-radius: 4px;
        }

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text-primary);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(10, 14, 26, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            transition: background var(--transition);
        }

        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 16px;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .header-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #0a0e1a;
            font-weight: 900;
        }
        .header-logo span {
            background: linear-gradient(135deg, var(--text-primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        /* Search bar in nav */
        .header-search {
            flex: 1;
            max-width: 420px;
            position: relative;
            margin: 0 12px;
        }
        .header-search input {
            width: 100%;
            padding: 10px 18px 10px 46px;
            background: var(--bg-input);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            color: var(--text-primary);
            font-size: 14px;
            transition: border var(--transition), box-shadow var(--transition);
        }
        .header-search input::placeholder {
            color: var(--text-muted);
        }
        .header-search input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(0, 229, 255, 0.1);
        }
        .header-search .search-icon {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 16px;
            pointer-events: none;
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }
        .header-nav a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: background var(--transition), color var(--transition);
            white-space: nowrap;
        }
        .header-nav a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }
        .header-nav a.active {
            color: var(--bg-dark);
            background: var(--primary);
            font-weight: 600;
        }
        .header-nav a.active:hover {
            color: var(--bg-dark);
            background: var(--primary-light);
        }

        /* Mobile menu toggle */
        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.06);
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--text-primary);
            border: 1px solid var(--border-color);
            transition: background var(--transition);
            flex-shrink: 0;
        }
        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* ===== Article Banner ===== */
        .article-banner {
            padding-top: calc(var(--nav-height) + 60px);
            padding-bottom: 60px;
            background: linear-gradient(160deg, #0a0e1a 0%, #111827 50%, #0f1524 100%);
            position: relative;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 229, 255, 0.03) 0%, transparent 70%);
            pointer-events: none;
        }
        .article-banner::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -5%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(124, 77, 255, 0.03) 0%, transparent 70%);
            pointer-events: none;
        }

        .article-banner .container {
            position: relative;
            z-index: 1;
        }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .article-breadcrumb a:hover {
            color: var(--primary);
        }
        .article-breadcrumb .sep {
            color: var(--text-muted);
            font-size: 12px;
        }
        .article-breadcrumb .current {
            color: var(--text-secondary);
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }
        .article-meta .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(0, 229, 255, 0.12);
            color: var(--primary);
            border: 1px solid rgba(0, 229, 255, 0.2);
        }
        .article-meta .date {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta .date i {
            font-size: 14px;
        }

        .article-title {
            font-size: clamp(28px, 4.2vw, 52px);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            max-width: 900px;
            margin-bottom: 16px;
        }

        .article-desc {
            font-size: 18px;
            color: var(--text-secondary);
            line-height: 1.6;
            max-width: 700px;
        }

        /* ===== Article Content ===== */
        .article-section {
            padding: 60px 0 80px;
            background: var(--bg-dark);
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }

        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 40px 44px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .article-body .content {
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-secondary);
        }
        .article-body .content h2 {
            font-size: 24px;
            font-weight: 700;
            margin: 36px 0 16px;
            color: var(--text-primary);
        }
        .article-body .content h3 {
            font-size: 20px;
            font-weight: 600;
            margin: 28px 0 12px;
            color: var(--text-primary);
        }
        .article-body .content p {
            margin-bottom: 18px;
        }
        .article-body .content p:last-child {
            margin-bottom: 0;
        }
        .article-body .content ul,
        .article-body .content ol {
            margin: 16px 0;
            padding-left: 24px;
        }
        .article-body .content ul li {
            list-style: disc;
            margin-bottom: 8px;
        }
        .article-body .content ol li {
            list-style: decimal;
            margin-bottom: 8px;
        }
        .article-body .content blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            margin: 24px 0;
            background: rgba(0, 229, 255, 0.04);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body .content img {
            border-radius: var(--radius-md);
            margin: 28px 0;
            width: 100%;
            object-fit: cover;
        }
        .article-body .content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body .content a:hover {
            color: var(--primary-light);
        }

        .article-body .content .wp-block-table,
        .article-body .content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 14px;
        }
        .article-body .content table th,
        .article-body .content table td {
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            text-align: left;
        }
        .article-body .content table th {
            background: rgba(0, 229, 255, 0.06);
            color: var(--text-primary);
            font-weight: 600;
        }
        .article-body .content table td {
            color: var(--text-secondary);
        }

        /* Article not found */
        .article-not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .article-not-found .icon-big {
            font-size: 64px;
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .article-not-found h2 {
            font-size: 28px;
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .article-not-found .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            background: var(--primary);
            color: var(--bg-dark);
            font-weight: 600;
            transition: background var(--transition), transform var(--transition);
        }
        .article-not-found .btn-back:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            color: var(--bg-dark);
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
            position: sticky;
            top: calc(var(--nav-height) + 24px);
        }

        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i {
            color: var(--primary);
            font-size: 18px;
        }

        .sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.02);
            transition: background var(--transition);
            font-size: 14px;
            color: var(--text-secondary);
            border: 1px solid transparent;
        }
        .sidebar-list a:hover {
            background: rgba(0, 229, 255, 0.05);
            border-color: var(--border-light);
            color: var(--text-primary);
        }
        .sidebar-list a .num {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
            color: var(--primary);
            flex-shrink: 0;
        }
        .sidebar-list a .text {
            flex: 1;
            line-height: 1.4;
        }

        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar-tags a {
            padding: 6px 14px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-muted);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .sidebar-tags a:hover {
            background: rgba(0, 229, 255, 0.1);
            border-color: rgba(0, 229, 255, 0.3);
            color: var(--primary);
        }

        .sidebar-cta {
            background: linear-gradient(135deg, rgba(0, 229, 255, 0.06), rgba(124, 77, 255, 0.06));
            border: 1px solid var(--border-light);
            text-align: center;
        }
        .sidebar-cta h3 {
            justify-content: center;
        }
        .sidebar-cta p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }
        .sidebar-cta .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 50px;
            background: var(--primary);
            color: var(--bg-dark);
            font-weight: 600;
            font-size: 14px;
            transition: background var(--transition), transform var(--transition);
        }
        .sidebar-cta .btn-cta:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            color: var(--bg-dark);
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
        }
        .related-section .section-title {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .related-section .section-title i {
            color: var(--primary);
        }
        .related-section .section-sub {
            color: var(--text-muted);
            margin-bottom: 32px;
            font-size: 15px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-dark);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--border-light);
        }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 18px 20px 20px;
        }
        .related-card .card-body .card-cat {
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 6px;
            display: block;
        }
        .related-card .card-body h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .related-card .card-body h4 a {
            color: var(--text-primary);
            transition: color var(--transition);
        }
        .related-card .card-body h4 a:hover {
            color: var(--primary);
        }
        .related-card .card-body .card-excerpt {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 12px;
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ===== Footer ===== */
        .footer {
            background: #050810;
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
            color: var(--text-secondary);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--text-primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-muted);
            margin-bottom: 16px;
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--text-muted);
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: var(--bg-dark);
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        .footer h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 18px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .footer-links a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom-links {
            display: flex;
            gap: 20px;
        }
        .footer-bottom-links a {
            color: var(--text-muted);
            transition: color var(--transition);
            font-size: 13px;
        }
        .footer-bottom-links a:hover {
            color: var(--primary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .header-search {
                display: none;
            }
            .header-nav {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(10, 14, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px 24px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                transition: transform 0.35s ease, opacity 0.35s ease;
                pointer-events: none;
                box-shadow: var(--shadow-lg);
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            }
            .header-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .header-nav a {
                width: 100%;
                text-align: center;
                padding: 12px;
                font-size: 16px;
            }
            .menu-toggle {
                display: flex;
            }
            .article-banner {
                padding-top: calc(var(--nav-height) + 40px);
                padding-bottom: 40px;
            }
            .article-title {
                font-size: 26px;
            }
            .article-desc {
                font-size: 15px;
            }
            .article-body {
                padding: 24px 20px;
            }
            .article-sidebar {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .article-body {
                padding: 20px 16px;
                border-radius: var(--radius-md);
            }
            .article-meta {
                gap: 10px;
            }
            .related-card .card-img {
                height: 150px;
            }
            .sidebar-card {
                padding: 18px;
            }
            .footer {
                padding: 40px 0 20px;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-muted);
        }

        /* ===== Selection ===== */
        ::selection {
            background: rgba(0, 229, 255, 0.25);
            color: var(--text-primary);
        }

/* roulang page: category1 */
/* ===== :root 设计变量 ===== */
        :root {
            --primary: #6c3bf1;
            --primary-light: #8b5cf6;
            --primary-dark: #4f28b5;
            --secondary: #f59e0b;
            --secondary-light: #fbbf24;
            --accent: #ec4899;
            --bg-dark: #0b0d17;
            --bg-section: #11131f;
            --bg-card: #1a1d2e;
            --bg-card-hover: #22263b;
            --text-white: #f1f5f9;
            --text-light: #cbd5e1;
            --text-muted: #8892a8;
            --border-color: rgba(108, 59, 241, 0.2);
            --border-glow: rgba(108, 59, 241, 0.4);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 30px rgba(108, 59, 241, 0.15);
            --shadow-lg: 0 20px 60px rgba(108, 59, 241, 0.2);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container-max: 1280px;
            --header-h: 76px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-white);
            line-height: 1.65;
            font-size: 16px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover,
        a:focus-visible {
            color: var(--secondary);
        }
        a:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: transparent;
            color: inherit;
        }
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-white);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Nav ===== */
        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(11, 13, 23, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            height: var(--header-h);
            display: flex;
            align-items: center;
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .header-logo span {
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .header-logo .logo-icon {
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            -webkit-text-fill-color: #fff;
            flex-shrink: 0;
        }

        /* 搜索主导导航 */
        .nav-center {
            flex: 1;
            max-width: 480px;
            margin: 0 24px;
            position: relative;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            padding: 0 18px;
            height: 44px;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .nav-search:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(108, 59, 241, 0.2);
        }
        .nav-search .search-icon {
            color: var(--text-muted);
            font-size: 1rem;
            margin-right: 10px;
            flex-shrink: 0;
        }
        .nav-search input {
            flex: 1;
            background: transparent;
            border: none;
            color: var(--text-white);
            font-size: 0.95rem;
            padding: 8px 0;
            min-width: 0;
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .nav-search .search-btn {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: 50px;
            padding: 6px 18px;
            font-size: 0.85rem;
            font-weight: 600;
            cursor: pointer;
            transition: opacity var(--transition), transform var(--transition);
            flex-shrink: 0;
            border: none;
        }
        .nav-search .search-btn:hover {
            opacity: 0.9;
            transform: scale(1.02);
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }
        .header-nav a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-light);
            transition: background var(--transition), color var(--transition);
            white-space: nowrap;
        }
        .header-nav a:hover {
            background: rgba(108, 59, 241, 0.12);
            color: var(--text-white);
        }
        .header-nav a.active {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(108, 59, 241, 0.3);
        }

        /* 汉堡按钮 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px;
            background: none;
            border: none;
            flex-shrink: 0;
        }
        .hamburger span {
            width: 26px;
            height: 2.5px;
            background: var(--text-white);
            border-radius: 4px;
            transition: var(--transition);
            display: block;
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* 移动端菜单面板 */
        .mobile-menu {
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(11, 13, 23, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            padding: 32px 24px;
            display: none;
            flex-direction: column;
            gap: 12px;
            z-index: 999;
            overflow-y: auto;
            border-top: 1px solid var(--border-color);
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            padding: 14px 20px;
            border-radius: var(--radius-md);
            font-size: 1.1rem;
            font-weight: 500;
            color: var(--text-light);
            background: var(--bg-card);
            transition: background var(--transition), color var(--transition);
            text-align: center;
        }
        .mobile-menu a:hover {
            background: rgba(108, 59, 241, 0.15);
            color: var(--text-white);
        }
        .mobile-menu a.active {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            position: relative;
            padding: 100px 0 80px;
            text-align: center;
            overflow: hidden;
            background: var(--bg-section);
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 0;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 13, 23, 0.4) 0%, var(--bg-dark) 100%);
            z-index: 1;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(108, 59, 241, 0.18);
            border: 1px solid var(--border-glow);
            border-radius: 50px;
            padding: 6px 20px;
            font-size: 0.85rem;
            color: var(--primary-light);
            font-weight: 500;
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
        }
        .category-hero .hero-badge i {
            font-size: 0.9rem;
        }
        .category-hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--text-white) 30%, var(--primary-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 16px;
            letter-spacing: -1px;
        }
        .category-hero p {
            font-size: 1.2rem;
            color: var(--text-light);
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 8px;
        }
        .hero-stats .stat-item {
            text-align: center;
        }
        .hero-stats .stat-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--secondary);
            line-height: 1.2;
            display: block;
        }
        .hero-stats .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 2px;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-section);
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .section-header h2 span {
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-header p {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .section-divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 4px;
            margin: 16px auto 0;
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            gap: 28px;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        }
        .card-grid.cols-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .card-grid.cols-3 {
            grid-template-columns: repeat(3, 1fr);
        }
        @media (max-width: 1024px) {
            .card-grid.cols-3 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .card-grid.cols-2,
            .card-grid.cols-3 {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--border-glow);
        }
        .card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            transition: transform var(--transition);
        }
        .card:hover .card-img {
            transform: scale(1.03);
        }
        .card .card-body {
            padding: 24px 22px 26px;
        }
        .card .card-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(108, 59, 241, 0.18);
            color: var(--primary-light);
            margin-bottom: 12px;
            border: 1px solid rgba(108, 59, 241, 0.15);
        }
        .card .card-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-white);
            line-height: 1.3;
        }
        .card .card-text {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .card .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .card .card-meta i {
            margin-right: 4px;
            color: var(--primary-light);
        }
        .card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            color: var(--primary-light);
            font-size: 0.9rem;
            margin-top: 12px;
            transition: gap var(--transition);
        }
        .card .card-link:hover {
            gap: 14px;
            color: var(--secondary);
        }

        /* ===== 徽章 / 标签 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(108, 59, 241, 0.15);
            color: var(--primary-light);
            border: 1px solid rgba(108, 59, 241, 0.2);
        }
        .badge.badge-secondary {
            background: rgba(245, 158, 11, 0.15);
            color: var(--secondary);
            border-color: rgba(245, 158, 11, 0.2);
        }
        .badge.badge-accent {
            background: rgba(236, 72, 153, 0.15);
            color: var(--accent);
            border-color: rgba(236, 72, 153, 0.2);
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
            border: none;
            line-height: 1.2;
        }
        .btn:active {
            transform: scale(0.96);
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 20px rgba(108, 59, 241, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(108, 59, 241, 0.4);
            color: #fff;
            opacity: 0.95;
        }
        .btn-secondary {
            background: transparent;
            color: var(--text-white);
            border: 1.5px solid var(--border-color);
        }
        .btn-secondary:hover {
            border-color: var(--primary-light);
            color: var(--primary-light);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }

        /* ===== 赛事流程时间线 ===== */
        .timeline {
            display: flex;
            flex-direction: column;
            gap: 0;
            position: relative;
            padding-left: 40px;
            max-width: 800px;
            margin: 0 auto;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 16px;
            top: 0;
            bottom: 0;
            width: 3px;
            background: linear-gradient(180deg, var(--primary), var(--accent));
            border-radius: 4px;
        }
        .timeline-item {
            position: relative;
            padding: 0 0 40px 30px;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -32px;
            top: 6px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--primary);
            border: 3px solid var(--bg-dark);
            box-shadow: 0 0 0 3px var(--primary-light);
        }
        .timeline-item .tl-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-white);
        }
        .timeline-item .tl-text {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
        }
        .timeline-item .tl-badge {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(108, 59, 241, 0.15);
            color: var(--primary-light);
            margin-bottom: 8px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-glow);
        }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-white);
            gap: 16px;
            user-select: none;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-question i {
            color: var(--primary-light);
            font-size: 1.1rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            text-align: center;
            background: var(--bg-section);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.1;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: var(--text-light);
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-section);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }
        .footer-brand .footer-logo {
            font-size: 1.6rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
            margin-bottom: 12px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 18px;
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            font-size: 1.1rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
            border-color: var(--primary);
        }
        .footer h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-links a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-bottom-links {
            display: flex;
            gap: 20px;
        }
        .footer-bottom-links a {
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .footer-bottom-links a:hover {
            color: var(--primary-light);
        }
        @media (max-width: 640px) {
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-bottom-links {
                gap: 14px;
            }
        }

        /* ===== 响应式导航 ===== */
        @media (max-width: 1024px) {
            .nav-center {
                max-width: 320px;
                margin: 0 16px;
            }
        }
        @media (max-width: 820px) {
            .header-nav {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .nav-center {
                max-width: 100%;
                margin: 0 12px;
            }
            .category-hero h1 {
                font-size: 2.2rem;
            }
            .category-hero p {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stats .stat-num {
                font-size: 1.6rem;
            }
            .section-header h2 {
                font-size: 1.7rem;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 520px) {
            .category-hero {
                padding: 70px 0 50px;
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .section {
                padding: 50px 0;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .card .card-body {
                padding: 18px 16px 20px;
            }
            .footer-grid {
                gap: 24px;
            }
            .nav-search .search-btn {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .gap-12 {
            gap: 12px;
        }
        .gap-20 {
            gap: 20px;
        }
        .fw-700 {
            font-weight: 700;
        }
        .text-muted {
            color: var(--text-muted);
        }