/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #00d4ff;
            --primary-dark: #0099cc;
            --primary-glow: rgba(0, 212, 255, 0.35);
            --secondary: #7c3aed;
            --secondary-glow: rgba(124, 58, 237, 0.35);
            --accent: #f59e0b;
            --bg-dark: #0a0a14;
            --bg-card: #131322;
            --bg-card-hover: #1a1a30;
            --bg-nav: rgba(10, 10, 20, 0.92);
            --text-main: #f0f4ff;
            --text-secondary: #a0a8c0;
            --text-muted: #6b7280;
            --border-color: rgba(0, 212, 255, 0.15);
            --border-glow: rgba(0, 212, 255, 0.3);
            --radius: 12px;
            --radius-sm: 6px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(0, 212, 255, 0.06);
            --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.08);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
        }

        /* ===== 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-main);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: #66e5ff;
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ===== Utility Classes ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .text-center {
            text-align: center;
        }
        .text-gradient {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .neon-glow {
            text-shadow: 0 0 20px var(--primary-glow), 0 0 40px var(--primary-glow);
        }
        .section-padding {
            padding: 100px 0;
        }
        .section-title {
            font-size: 2.4rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            line-height: 1.2;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 48px;
        }
        .divider {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 4px;
            margin: 0 auto 24px;
        }

        /* ===== Header & Navigation ===== */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: var(--bg-nav);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
            transition: var(--transition);
        }
        header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.6rem;
            font-weight: 900;
            letter-spacing: 0.5px;
            color: var(--text-main);
            text-decoration: none;
            transition: var(--transition);
        }
        .logo:hover {
            color: var(--primary);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 10px;
            color: #fff;
            font-size: 1.3rem;
            box-shadow: 0 0 20px var(--primary-glow);
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), #a78bfa);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo .domain-tag {
            font-size: 0.7rem;
            color: var(--text-muted);
            -webkit-text-fill-color: var(--text-muted);
            background: none;
            opacity: 0.6;
            display: none;
        }

        nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        nav a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
            letter-spacing: 0.3px;
        }
        nav a i {
            font-size: 0.9rem;
            opacity: 0.6;
        }
        nav a:hover {
            color: var(--text-main);
            background: rgba(0, 212, 255, 0.06);
        }
        nav a.active {
            color: var(--primary);
            background: rgba(0, 212, 255, 0.08);
            box-shadow: inset 0 -2px 0 var(--primary);
        }
        nav a.active i {
            opacity: 1;
            color: var(--primary);
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--secondary)) !important;
            color: #fff !important;
            padding: 10px 24px !important;
            border-radius: 8px !important;
            font-weight: 600 !important;
            box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25);
            transition: var(--transition) !important;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 212, 255, 0.35) !important;
            color: #fff !important;
        }
        .nav-cta i {
            opacity: 1 !important;
        }

        .menu-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border-color);
            color: var(--text-main);
            font-size: 1.5rem;
            padding: 8px 12px;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition);
        }
        .menu-toggle:hover {
            background: rgba(0, 212, 255, 0.06);
            border-color: var(--primary);
        }

        /* ===== Hero Section ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding: 140px 0 80px;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 10, 20, 0.88) 0%, rgba(10, 10, 20, 0.7) 50%, rgba(10, 10, 20, 0.88) 100%);
            z-index: 1;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 200px;
            background: linear-gradient(to top, var(--bg-dark), transparent);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 212, 255, 0.1);
            border: 1px solid rgba(0, 212, 255, 0.2);
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--primary);
            margin-bottom: 28px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .hero h1 {
            font-size: 3.8rem;
            font-weight: 900;
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: -1px;
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--primary), #a78bfa);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.25rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 36px;
            border-radius: 10px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
            letter-spacing: 0.5px;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            box-shadow: 0 4px 24px rgba(0, 212, 255, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 212, 255, 0.4);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: var(--text-main);
            border: 1.5px solid rgba(0, 212, 255, 0.3);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            background: rgba(0, 212, 255, 0.06);
            transform: translateY(-3px);
            color: var(--primary);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px 60px;
            margin-top: 56px;
            padding-top: 40px;
            border-top: 1px solid rgba(0, 212, 255, 0.08);
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat .number {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--primary);
            display: block;
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== Features Section ===== */
        .features {
            background: var(--bg-dark);
            position: relative;
        }
        .features::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-glow), transparent);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
            margin-top: 16px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 36px 28px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: var(--transition);
        }
        .feature-card:hover {
            border-color: rgba(0, 212, 255, 0.2);
            transform: translateY(-6px);
            box-shadow: var(--shadow-card);
            background: var(--bg-card-hover);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(124, 58, 237, 0.1));
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(124, 58, 237, 0.2));
            box-shadow: 0 0 30px var(--primary-glow);
        }
        .feature-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .feature-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== Categories Section ===== */
        .categories {
            background: linear-gradient(180deg, var(--bg-dark), #0f0f20, var(--bg-dark));
            position: relative;
        }
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            cursor: pointer;
            min-height: 200px;
            display: flex;
            align-items: flex-end;
        }
        .category-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.35;
            transition: var(--transition);
        }
        .category-card:hover img {
            opacity: 0.5;
            transform: scale(1.05);
        }
        .category-card .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(10, 10, 20, 0.9), rgba(10, 10, 20, 0.3));
            z-index: 1;
        }
        .category-card .content {
            position: relative;
            z-index: 2;
            padding: 24px 20px;
            width: 100%;
        }
        .category-card .content h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-main);
        }
        .category-card .content p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-bottom: 12px;
        }
        .category-card .tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.15);
            border-radius: 20px;
            font-size: 0.75rem;
            color: var(--primary);
            font-weight: 500;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
            border-color: rgba(0, 212, 255, 0.2);
        }

        /* ===== Latest News Section ===== */
        .latest-news {
            background: var(--bg-dark);
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
            border-color: rgba(0, 212, 255, 0.15);
        }
        .news-card .thumb {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: #1a1a30;
        }
        .news-card .body {
            padding: 20px 22px 24px;
        }
        .news-card .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 10px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .news-card .meta .cat {
            background: rgba(0, 212, 255, 0.08);
            padding: 2px 10px;
            border-radius: 20px;
            color: var(--primary);
            font-weight: 500;
            font-size: 0.7rem;
        }
        .news-card .meta .date i {
            margin-right: 4px;
        }
        .news-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
            color: var(--text-main);
            transition: var(--transition);
        }
        .news-card:hover h3 {
            color: var(--primary);
        }
        .news-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 14px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
        }
        .news-card .read-more i {
            font-size: 0.75rem;
            transition: var(--transition);
        }
        .news-card:hover .read-more i {
            transform: translateX(4px);
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 20px;
            color: var(--text-muted);
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px dashed var(--border-color);
        }
        .news-empty i {
            font-size: 2.4rem;
            display: block;
            margin-bottom: 16px;
            opacity: 0.4;
        }

        /* ===== Stats Section ===== */
        .stats-section {
            background: linear-gradient(135deg, #0a0a14, #0f0f24);
            position: relative;
            overflow: hidden;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.06;
            pointer-events: none;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 28px;
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .stat-item {
            padding: 24px 16px;
            background: rgba(0, 212, 255, 0.02);
            border-radius: var(--radius);
            border: 1px solid rgba(0, 212, 255, 0.05);
            transition: var(--transition);
        }
        .stat-item:hover {
            border-color: rgba(0, 212, 255, 0.12);
            background: rgba(0, 212, 255, 0.04);
        }
        .stat-item .num {
            font-size: 2.8rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--primary), #a78bfa);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: block;
            line-height: 1.2;
        }
        .stat-item .label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 8px;
            font-weight: 500;
        }

        /* ===== Process / Steps ===== */
        .process {
            background: var(--bg-dark);
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 24px;
            position: relative;
        }
        .process-steps::before {
            content: '';
            position: absolute;
            top: 44px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary), var(--primary));
            opacity: 0.2;
            z-index: 0;
        }
        .step {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 20px 16px;
        }
        .step-number {
            width: 56px;
            height: 56px;
            margin: 0 auto 20px;
            background: linear-gradient(135deg, var(--bg-card), var(--bg-card-hover));
            border: 2px solid rgba(0, 212, 255, 0.15);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 900;
            color: var(--primary);
            transition: var(--transition);
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.05);
        }
        .step:hover .step-number {
            border-color: var(--primary);
            box-shadow: 0 0 40px var(--primary-glow);
            transform: scale(1.05);
        }
        .step h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            background: linear-gradient(180deg, var(--bg-dark), #0f0f20);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(0, 212, 255, 0.12);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            color: var(--text-main);
            font-size: 1rem;
            font-weight: 600;
            text-align: left;
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            color: var(--primary);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }
        .faq-answer p {
            margin-bottom: 8px;
        }
        .faq-answer p:last-child {
            margin-bottom: 0;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, #0a0a14, #0f0f24);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.04;
            pointer-events: none;
        }
        .cta-box {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            z-index: 1;
            box-shadow: var(--shadow-card);
        }
        .cta-box h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-box p {
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
        }
        .cta-box .btn {
            font-size: 1.1rem;
            padding: 18px 44px;
        }

        /* ===== Footer ===== */
        footer {
            background: #05050e;
            border-top: 1px solid rgba(0, 212, 255, 0.05);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 1.4rem;
            margin-bottom: 16px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--text-main);
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-col ul li a i {
            font-size: 0.7rem;
            opacity: 0.5;
        }
        .footer-bottom {
            border-top: 1px solid rgba(0, 212, 255, 0.05);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 8px;
            background: rgba(0, 212, 255, 0.05);
            border: 1px solid rgba(0, 212, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: rgba(0, 212, 255, 0.1);
            border-color: rgba(0, 212, 255, 0.2);
            color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .section-title {
                font-size: 2rem;
            }
            .hero h1 {
                font-size: 3rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .process-steps::before {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }
            nav {
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: var(--bg-nav);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border-color);
                display: none;
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
            }
            nav.open {
                display: flex;
            }
            nav a {
                width: 100%;
                padding: 12px 16px;
            }
            nav .nav-cta {
                text-align: center;
                margin-top: 8px;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 20px 30px;
            }
            .hero-stat .number {
                font-size: 1.6rem;
            }
            .section-padding {
                padding: 60px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .cta-box {
                padding: 36px 24px;
            }
            .cta-box h2 {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .categories-grid {
                grid-template-columns: 1fr 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr 1fr;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                max-width: 300px;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            header .container {
                height: 64px;
            }
            .logo {
                font-size: 1.3rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero {
                padding: 120px 0 60px;
                min-height: auto;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }
            .categories-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-item .num {
                font-size: 2rem;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .cta-box h2 {
                font-size: 1.3rem;
            }
            .faq-question {
                font-size: 0.9rem;
                padding: 16px 18px;
            }
            .faq-answer {
                padding: 0 18px 16px;
                font-size: 0.85rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .hero-stats {
                gap: 16px 20px;
                margin-top: 32px;
                padding-top: 24px;
            }
        }

        /* ===== Animations ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeInUp 0.6s ease forwards;
        }
        .animate-in-delay-1 {
            animation-delay: 0.1s;
        }
        .animate-in-delay-2 {
            animation-delay: 0.2s;
        }
        .animate-in-delay-3 {
            animation-delay: 0.3s;
        }
        .animate-in-delay-4 {
            animation-delay: 0.4s;
        }

/* roulang page: article */
:root {
            --primary: #ff2d55;
            --primary-dark: #cc0033;
            --primary-glow: rgba(255, 45, 85, 0.35);
            --secondary: #7b2ff7;
            --secondary-glow: rgba(123, 47, 247, 0.3);
            --accent: #ffd700;
            --bg-dark: #0a0a0f;
            --bg-card: #12121a;
            --bg-card-hover: #1a1a28;
            --bg-surface: #0e0e16;
            --text-main: #f0f0f5;
            --text-muted: #8888aa;
            --text-dim: #555577;
            --border-color: #2a2a3e;
            --border-glow: #ff2d5533;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 32px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,45,85,0.08);
            --shadow-glow: 0 0 30px rgba(255,45,85,0.15);
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

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

        html { scroll-behavior: smooth; }

        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.7;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
        }

        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: #ff6b8a; }
        img { max-width: 100%; height: auto; display: block; }
        ul,ol { list-style: none; }
        h1,h2,h3,h4,h5,h6 { font-weight: 700; line-height: 1.3; color: #fff; }
        h1 { font-size: 2.2rem; }
        h2 { font-size: 1.6rem; }
        h3 { font-size: 1.25rem; }
        p { margin-bottom: 1rem; color: var(--text-muted); }
        strong { color: #fff; }

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

        /* ===== HEADER / NAV ===== */
        header {
            background: linear-gradient(180deg, #0c0c18 0%, rgba(10,10,15,0.98) 100%);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(20px);
            box-shadow: 0 4px 30px rgba(0,0,0,0.5);
        }

        header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            padding-bottom: 12px;
            flex-wrap: wrap;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
        }
        .logo:hover { color: var(--primary); }
        .logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: #fff;
            box-shadow: 0 0 20px var(--primary-glow);
        }
        .logo span:last-child {
            background: linear-gradient(90deg, #fff, #ccc);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        #mainNav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        #mainNav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        #mainNav a i { font-size: 0.85rem; }
        #mainNav a:hover {
            color: #fff;
            background: rgba(255,45,85,0.08);
        }
        #mainNav a.active {
            color: var(--primary);
            background: rgba(255,45,85,0.12);
            box-shadow: inset 0 -2px 0 var(--primary);
        }
        #mainNav a.nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-weight: 600;
            padding: 8px 22px;
            border-radius: var(--radius-sm);
            box-shadow: 0 0 20px var(--primary-glow);
        }
        #mainNav a.nav-cta:hover {
            transform: translateY(-1px);
            box-shadow: 0 0 35px var(--primary-glow);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border-color);
            color: #fff;
            font-size: 1.4rem;
            padding: 6px 14px;
            border-radius: var(--radius-sm);
            cursor: pointer;
        }

        /* ===== ARTICLE BANNER ===== */
        .article-banner {
            background: linear-gradient(135deg, #0c0c1a 0%, #1a0a18 100%);
            padding: 60px 0 40px;
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .article-banner .container {
            position: relative;
            z-index: 1;
        }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.85rem;
            color: var(--text-dim);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a { color: var(--text-muted); }
        .article-breadcrumb a:hover { color: var(--primary); }
        .article-breadcrumb .sep { color: var(--text-dim); }

        .article-meta-top {
            display: flex;
            align-items: center;
            gap: 18px;
            flex-wrap: wrap;
            margin-bottom: 16px;
        }
        .article-meta-top .badge {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .article-meta-top .date {
            color: var(--text-dim);
            font-size: 0.85rem;
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .article-meta-top .date i { font-size: 0.75rem; }

        .article-banner h1 {
            font-size: 2.4rem;
            line-height: 1.25;
            margin-bottom: 16px;
            background: linear-gradient(90deg, #fff, #e0e0f0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            max-width: 900px;
        }

        .article-excerpt {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 800px;
            line-height: 1.7;
            border-left: 3px solid var(--primary);
            padding-left: 20px;
            margin-top: 8px;
        }

        /* ===== MAIN CONTENT ===== */
        .article-main-wrap {
            padding: 50px 0 60px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
        }

        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
        }
        .article-body .content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-main);
        }
        .article-body .content p {
            margin-bottom: 1.2rem;
            color: #d0d0e0;
        }
        .article-body .content h2 {
            font-size: 1.5rem;
            margin: 2rem 0 1rem;
            color: #fff;
        }
        .article-body .content h3 {
            font-size: 1.2rem;
            margin: 1.6rem 0 0.8rem;
            color: #fff;
        }
        .article-body .content ul,
        .article-body .content ol {
            margin: 1rem 0 1.5rem 1.8rem;
            color: #d0d0e0;
        }
        .article-body .content li {
            margin-bottom: 0.6rem;
            list-style: disc;
        }
        .article-body .content a {
            color: var(--primary);
            text-decoration: underline;
        }
        .article-body .content blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            margin: 1.5rem 0;
            background: rgba(255,45,85,0.05);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: #c0c0d8;
        }
        .article-body .content img {
            border-radius: var(--radius-md);
            margin: 1.5rem 0;
            box-shadow: 0 4px 20px rgba(0,0,0,0.4);
        }
        .article-body .content .highlight-box {
            background: rgba(123,47,247,0.08);
            border: 1px solid rgba(123,47,247,0.2);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            margin: 1.5rem 0;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
        }
        .article-tags .tag {
            background: rgba(255,45,85,0.08);
            color: var(--primary);
            padding: 5px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
            border: 1px solid rgba(255,45,85,0.15);
            transition: var(--transition);
        }
        .article-tags .tag:hover {
            background: rgba(255,45,85,0.18);
            border-color: var(--primary);
        }

        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 24px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
        }
        .article-share span {
            color: var(--text-dim);
            font-size: 0.9rem;
        }
        .article-share a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg-card-hover);
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .article-share a:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== SIDEBAR ===== */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
        }
        .sidebar-card h3 {
            font-size: 1.05rem;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 8px;
            color: #fff;
        }
        .sidebar-card h3 i { color: var(--primary); }

        .sidebar-recent li {
            padding: 10px 0;
            border-bottom: 1px solid rgba(42,42,62,0.4);
        }
        .sidebar-recent li:last-child { border-bottom: none; }
        .sidebar-recent a {
            color: var(--text-muted);
            font-size: 0.9rem;
            display: flex;
            gap: 10px;
            align-items: flex-start;
        }
        .sidebar-recent a:hover { color: var(--primary); }
        .sidebar-recent a .thumb {
            width: 50px;
            height: 50px;
            border-radius: var(--radius-sm);
            background: var(--bg-card-hover);
            flex-shrink: 0;
            overflow: hidden;
        }
        .sidebar-recent a .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .sidebar-recent a .info {
            flex: 1;
            min-width: 0;
        }
        .sidebar-recent a .info .title {
            display: block;
            font-weight: 500;
            line-height: 1.4;
            margin-bottom: 4px;
        }
        .sidebar-recent a .info .date {
            font-size: 0.75rem;
            color: var(--text-dim);
        }

        .sidebar-cta {
            background: linear-gradient(135deg, rgba(255,45,85,0.12), rgba(123,47,247,0.12));
            border: 1px solid rgba(255,45,85,0.2);
            text-align: center;
        }
        .sidebar-cta h3 { border-bottom-color: rgba(255,45,85,0.15); }
        .sidebar-cta p {
            font-size: 0.9rem;
            margin-bottom: 18px;
        }
        .sidebar-cta .btn-cta {
            display: inline-block;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            padding: 12px 30px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            box-shadow: 0 0 25px var(--primary-glow);
            transition: var(--transition);
        }
        .sidebar-cta .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 40px var(--primary-glow);
        }

        /* ===== RELATED ARTICLES ===== */
        .related-section {
            padding: 50px 0;
            border-top: 1px solid var(--border-color);
            background: var(--bg-surface);
        }
        .related-section h2 {
            text-align: center;
            margin-bottom: 36px;
            font-size: 1.5rem;
        }
        .related-section h2 i { color: var(--primary); margin-right: 10px; }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
            border-color: rgba(255,45,85,0.2);
        }
        .related-card .thumb {
            width: 100%;
            height: 170px;
            background: var(--bg-card-hover);
            overflow: hidden;
        }
        .related-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .related-card:hover .thumb img { transform: scale(1.05); }
        .related-card .info {
            padding: 18px 20px 20px;
        }
        .related-card .info .cat {
            font-size: 0.75rem;
            color: var(--primary);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 6px;
        }
        .related-card .info h3 {
            font-size: 1rem;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .related-card .info h3 a { color: #fff; }
        .related-card .info h3 a:hover { color: var(--primary); }
        .related-card .info p {
            font-size: 0.85rem;
            color: var(--text-dim);
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ===== FOOTER ===== */
        footer {
            background: linear-gradient(180deg, #0c0c18 0%, #07070e 100%);
            border-top: 1px solid var(--border-color);
            padding: 50px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        .footer-brand .logo { margin-bottom: 16px; font-size: 1.3rem; }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-dim);
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            margin-bottom: 16px;
            color: #fff;
            letter-spacing: 0.3px;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a {
            color: var(--text-dim);
            font-size: 0.88rem;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .footer-col ul li a i { font-size: 0.6rem; color: var(--primary); }
        .footer-col ul li a:hover { color: var(--primary); padding-left: 4px; }

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-bottom span {
            color: var(--text-dim);
            font-size: 0.82rem;
        }
        .footer-bottom a { color: var(--text-muted); }
        .footer-bottom a:hover { color: var(--primary); }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a {
            width: 36px;
            height: 36px;
            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-dim);
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            #mainNav {
                display: none;
                width: 100%;
                flex-direction: column;
                padding: 16px 0 8px;
                gap: 4px;
                border-top: 1px solid var(--border-color);
                margin-top: 12px;
            }
            #mainNav.open { display: flex; }
            #mainNav a { width: 100%; padding: 10px 16px; }
            #mainNav a.nav-cta { text-align: center; }

            .article-banner h1 { font-size: 1.6rem; }
            .article-body { padding: 24px; }
            .article-body .content { font-size: 0.98rem; }

            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .article-breadcrumb { font-size: 0.78rem; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 14px; }
            .article-banner { padding: 36px 0 28px; }
            .article-banner h1 { font-size: 1.3rem; }
            .article-excerpt { font-size: 0.95rem; padding-left: 14px; }
            .article-body { padding: 18px; border-radius: var(--radius-md); }
            .article-meta-top { gap: 10px; }
            .sidebar-card { padding: 18px; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --bg-deep: #0a0a1a;
            --bg-dark: #0d0d2b;
            --bg-card: #111128;
            --bg-card-hover: #1a1a3e;
            --neon-blue: #00d4ff;
            --neon-purple: #7b2ffc;
            --neon-gold: #ffd700;
            --neon-cyan: #00f0ff;
            --text-white: #f0f0f8;
            --text-light: #b0b0c8;
            --text-muted: #7a7a9a;
            --border-dark: #1e1e40;
            --border-neon: rgba(0, 212, 255, 0.25);
            --shadow-neon: 0 0 30px rgba(0, 212, 255, 0.15);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
            --header-h: 72px;
        }

        /* ===== 基础 Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-deep);
            color: var(--text-white);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a { color: var(--neon-blue); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--neon-cyan); text-decoration: none; }
        a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--neon-blue); outline-offset: 3px; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text-white); }
        h1 { font-size: clamp(2.2rem, 5.5vw, 3.8rem); font-weight: 900; }
        h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 700; }
        h3 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); font-weight: 700; }
        h4 { font-size: 1.2rem; font-weight: 700; }
        p { color: var(--text-light); margin-bottom: 0.8rem; }
        .container { max-width: var(--container-max); margin: 0 auto; padding: 0 1.5rem; }
        .section-pad { padding: 5rem 0; }
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-title h2 {
            background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
        }
        .section-title p {
            max-width: 640px;
            margin: 0.8rem auto 0;
            color: var(--text-muted);
            font-size: 1.05rem;
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar { width: 8px; }
        ::-webkit-scrollbar-track { background: var(--bg-deep); }
        ::-webkit-scrollbar-thumb { background: var(--border-dark); border-radius: 10px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--neon-blue); }

        /* ===== 导航 Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(10, 10, 26, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-dark);
            z-index: 1000;
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.4rem;
            font-weight: 900;
            color: var(--text-white);
            letter-spacing: 0.5px;
            transition: var(--transition);
        }
        .logo:hover { color: var(--neon-blue); }
        .logo-icon {
            font-size: 1.8rem;
            color: var(--neon-gold);
            filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.4));
        }
        #mainNav {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        #mainNav a {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.5rem 1.1rem;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
            letter-spacing: 0.3px;
        }
        #mainNav a i { font-size: 0.9rem; }
        #mainNav a:hover {
            color: var(--text-white);
            background: rgba(0, 212, 255, 0.06);
        }
        #mainNav a.active {
            color: var(--neon-blue);
            background: rgba(0, 212, 255, 0.08);
            text-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
        }
        #mainNav a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 2px;
            background: var(--neon-blue);
            box-shadow: 0 0 12px var(--neon-blue);
            border-radius: 2px;
        }
        #mainNav a.nav-cta {
            background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
            color: #fff;
            font-weight: 700;
            padding: 0.5rem 1.6rem;
            border-radius: var(--radius-md);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.25);
            margin-left: 0.6rem;
        }
        #mainNav a.nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 35px rgba(0, 212, 255, 0.4);
            background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 0.3rem;
            transition: var(--transition);
        }
        .nav-toggle:hover { color: var(--neon-blue); }

        /* ===== Hero / Banner ===== */
        .category-hero {
            position: relative;
            min-height: 460px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 7rem 1.5rem 4rem;
            margin-top: var(--header-h);
            overflow: hidden;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 10, 26, 0.88), rgba(13, 13, 43, 0.92));
            z-index: 1;
        }
        .category-hero .hero-glow {
            position: absolute;
            top: -30%;
            left: 50%;
            transform: translateX(-50%);
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(0, 212, 255, 0.12), transparent 70%);
            pointer-events: none;
            z-index: 1;
        }
        .category-hero .container { position: relative; z-index: 2; }
        .category-hero h1 {
            font-size: clamp(2.4rem, 6vw, 4rem);
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 1rem;
        }
        .category-hero h1 span {
            background: linear-gradient(135deg, var(--neon-gold), var(--neon-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero p {
            font-size: 1.15rem;
            max-width: 680px;
            margin: 0 auto 1.8rem;
            color: var(--text-light);
        }
        .category-hero .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.6rem;
            margin-top: 0.6rem;
        }
        .category-hero .hero-tags span {
            display: inline-block;
            padding: 0.3rem 1rem;
            border-radius: 20px;
            font-size: 0.85rem;
            background: rgba(0, 212, 255, 0.08);
            border: 1px solid var(--border-neon);
            color: var(--neon-blue);
            font-weight: 500;
        }

        /* ===== 板块通用卡片 ===== */
        .card-neon {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: 1.8rem;
            transition: var(--transition);
            box-shadow: var(--shadow-card);
        }
        .card-neon:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-neon);
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 212, 255, 0.1);
        }
        .card-neon .card-img {
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 1.2rem;
            aspect-ratio: 16 / 9;
            background: var(--bg-dark);
        }
        .card-neon .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card-neon:hover .card-img img { transform: scale(1.05); }
        .card-neon h3 {
            font-size: 1.2rem;
            margin-bottom: 0.5rem;
        }
        .card-neon p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 1rem;
        }
        .card-neon .card-meta {
            display: flex;
            align-items: center;
            gap: 1rem;
            font-size: 0.82rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-dark);
            padding-top: 1rem;
            margin-top: 0.4rem;
        }
        .card-neon .card-meta i { color: var(--neon-blue); margin-right: 0.3rem; }
        .card-neon .badge {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            border-radius: 12px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(123, 47, 252, 0.15);
            color: var(--neon-purple);
            border: 1px solid rgba(123, 47, 252, 0.25);
            margin-right: 0.4rem;
        }
        .card-neon .badge.hot { background: rgba(255, 215, 0, 0.12); color: var(--neon-gold); border-color: rgba(255, 215, 0, 0.2); }
        .card-neon .badge.new { background: rgba(0, 212, 255, 0.12); color: var(--neon-blue); border-color: rgba(0, 212, 255, 0.2); }

        /* ===== 网格 ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.8rem;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }

        /* ===== 分类介绍区 ===== */
        .intro-block {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 3rem;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 2.5rem 3rem;
            border: 1px solid var(--border-dark);
            box-shadow: var(--shadow-card);
        }
        .intro-block .intro-text { flex: 1 1 50%; min-width: 280px; }
        .intro-block .intro-text h2 {
            font-size: 1.8rem;
            margin-bottom: 1rem;
        }
        .intro-block .intro-text h2 span { color: var(--neon-gold); }
        .intro-block .intro-text p { color: var(--text-light); font-size: 1rem; }
        .intro-block .intro-stats {
            flex: 1 1 35%;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.2rem;
            min-width: 220px;
        }
        .intro-block .stat-item {
            text-align: center;
            padding: 1.2rem 0.8rem;
            background: rgba(0, 212, 255, 0.04);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-dark);
            transition: var(--transition);
        }
        .intro-block .stat-item:hover { border-color: var(--border-neon); }
        .intro-block .stat-item .num {
            font-size: 2rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .intro-block .stat-item .label { font-size: 0.82rem; color: var(--text-muted); margin-top: 0.2rem; }

        /* ===== 攻略列表 ===== */
        .guide-list-item {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 1.5rem 1.8rem;
            border: 1px solid var(--border-dark);
            transition: var(--transition);
            margin-bottom: 1rem;
            align-items: center;
        }
        .guide-list-item:hover {
            border-color: var(--border-neon);
            background: var(--bg-card-hover);
            transform: translateX(4px);
        }
        .guide-list-item .rank {
            font-size: 1.4rem;
            font-weight: 900;
            color: var(--neon-gold);
            min-width: 40px;
            text-align: center;
        }
        .guide-list-item .info { flex: 1; min-width: 180px; }
        .guide-list-item .info h4 { font-size: 1.05rem; margin-bottom: 0.2rem; }
        .guide-list-item .info p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }
        .guide-list-item .badge-group { display: flex; gap: 0.4rem; flex-wrap: wrap; }
        .guide-list-item .action-link {
            color: var(--neon-blue);
            font-weight: 600;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 0.3rem;
            transition: var(--transition);
        }
        .guide-list-item .action-link:hover { color: var(--neon-cyan); gap: 0.6rem; }

        /* ===== FAQ ===== */
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.2rem;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: 1.5rem 1.8rem;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-neon);
            background: var(--bg-card-hover);
        }
        .faq-item h4 {
            font-size: 1.05rem;
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .faq-item h4 i { color: var(--neon-gold); font-size: 0.9rem; }
        .faq-item p { font-size: 0.92rem; color: var(--text-muted); margin: 0; }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.06), rgba(123, 47, 252, 0.06));
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-lg);
            padding: 3rem 2.5rem;
            text-align: center;
            box-shadow: 0 0 40px rgba(0, 212, 255, 0.06);
        }
        .cta-block h2 { margin-bottom: 0.8rem; }
        .cta-block p { max-width: 540px; margin: 0 auto 1.8rem; color: var(--text-muted); }
        .cta-block .btn-group { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; }
        .btn-neon {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
            color: #fff;
            box-shadow: 0 0 24px rgba(0, 212, 255, 0.2);
        }
        .btn-neon:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 40px rgba(0, 212, 255, 0.35);
            color: #fff;
        }
        .btn-neon-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1rem;
            border: 2px solid var(--neon-blue);
            background: transparent;
            color: var(--neon-blue);
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-neon-outline:hover {
            background: rgba(0, 212, 255, 0.1);
            color: var(--neon-cyan);
            border-color: var(--neon-cyan);
            transform: translateY(-3px);
        }

        /* ===== 页脚 Footer ===== */
        footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-dark);
            padding: 4rem 0 0;
        }
        footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid var(--border-dark);
        }
        footer .footer-brand .logo { font-size: 1.3rem; margin-bottom: 0.8rem; display: inline-flex; }
        footer .footer-brand p { font-size: 0.9rem; color: var(--text-muted); max-width: 360px; margin-top: 0.6rem; }
        footer .footer-col h4 {
            font-size: 0.95rem;
            color: var(--text-white);
            margin-bottom: 1rem;
            font-weight: 700;
        }
        footer .footer-col ul li { margin-bottom: 0.5rem; }
        footer .footer-col ul li a {
            font-size: 0.88rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 0.4rem;
            transition: var(--transition);
        }
        footer .footer-col ul li a i { font-size: 0.7rem; color: var(--neon-blue); }
        footer .footer-col ul li a:hover { color: var(--neon-blue); padding-left: 4px; }
        footer .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 0;
            gap: 1rem;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        footer .footer-bottom a { color: var(--neon-blue); }
        footer .footer-bottom a:hover { color: var(--neon-cyan); }
        footer .footer-social { display: flex; gap: 0.8rem; }
        footer .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(0, 212, 255, 0.06);
            border: 1px solid var(--border-dark);
            color: var(--text-muted);
            font-size: 1rem;
            transition: var(--transition);
        }
        footer .footer-social a:hover {
            background: var(--neon-blue);
            color: #fff;
            border-color: var(--neon-blue);
            transform: translateY(-3px);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            footer .footer-grid { grid-template-columns: 1fr 1fr; }
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 860px) {
            .nav-toggle { display: block; }
            #mainNav {
                position: fixed;
                top: var(--header-h);
                left: 0;
                width: 100%;
                background: rgba(10, 10, 26, 0.98);
                backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 1.2rem 1.5rem;
                gap: 0.3rem;
                border-bottom: 1px solid var(--border-dark);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
            }
            #mainNav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            #mainNav a { width: 100%; padding: 0.7rem 1rem; }
            #mainNav a.nav-cta { margin-left: 0; justify-content: center; }
            #mainNav a.active::after { display: none; }
            .grid-3 { grid-template-columns: 1fr; }
            .grid-2 { grid-template-columns: 1fr; }
            .faq-grid { grid-template-columns: 1fr; }
            .intro-block { padding: 1.8rem 1.5rem; }
            .intro-block .intro-stats { grid-template-columns: 1fr 1fr; }
            .category-hero { min-height: 360px; padding: 6rem 1rem 3rem; }
            footer .footer-grid { grid-template-columns: 1fr; }
            footer .footer-bottom { flex-direction: column; text-align: center; }
            .guide-list-item { flex-direction: column; align-items: flex-start; }
            .guide-list-item .rank { text-align: left; }
        }
        @media (max-width: 520px) {
            .site-header .container { padding: 0 1rem; }
            .logo { font-size: 1.1rem; }
            .logo-icon { font-size: 1.4rem; }
            .section-pad { padding: 3rem 0; }
            .category-hero h1 { font-size: 1.8rem; }
            .category-hero p { font-size: 0.95rem; }
            .intro-block .intro-stats { grid-template-columns: 1fr 1fr; gap: 0.8rem; }
            .intro-block .stat-item .num { font-size: 1.4rem; }
            .card-neon { padding: 1.2rem; }
            .cta-block { padding: 2rem 1.2rem; }
            .btn-neon, .btn-neon-outline { width: 100%; justify-content: center; }
            .grid-4 { grid-template-columns: 1fr; }
        }