/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #E84C3D;
            --primary-dark: #C0392B;
            --primary-light: #F1948A;
            --accent: #F7C948;
            --accent-dark: #F0B820;
            --accent-light: #FDE8A0;
            --bg-dark: #0B0B1A;
            --bg-card: #12122A;
            --bg-card-hover: #1A1A3A;
            --bg-section: #0F0F22;
            --bg-light: #F8F9FA;
            --text-white: #FFFFFF;
            --text-light: #E0E0E0;
            --text-muted: #9B9BB5;
            --text-dark: #1A1A2E;
            --border-color: rgba(255, 255, 255, 0.08);
            --border-accent: rgba(247, 201, 72, 0.25);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 40px rgba(232, 76, 61, 0.15);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.35s 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;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-light);
            background: var(--bg-dark);
            min-height: 100vh;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-light);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-white);
        }
        h1 {
            font-size: 3.2rem;
        }
        h2 {
            font-size: 2.4rem;
        }
        h3 {
            font-size: 1.6rem;
        }
        h4 {
            font-size: 1.25rem;
        }
        p {
            margin-bottom: 0.5rem;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-wide {
            max-width: 1360px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .text-accent {
            color: var(--accent);
        }
        .text-primary {
            color: var(--primary);
        }
        .text-muted {
            color: var(--text-muted);
        }
        .mb-1 {
            margin-bottom: 0.5rem;
        }
        .mb-2 {
            margin-bottom: 1rem;
        }
        .mb-3 {
            margin-bottom: 1.5rem;
        }
        .mb-4 {
            margin-bottom: 2rem;
        }
        .mb-5 {
            margin-bottom: 3rem;
        }
        .mt-4 {
            margin-top: 2rem;
        }
        .mt-5 {
            margin-top: 3rem;
        }
        .gap-2 {
            gap: 1rem;
        }
        .gap-3 {
            gap: 1.5rem;
        }
        .gap-4 {
            gap: 2rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-between {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

        /* ===== Section ===== */
        .section {
            padding: 90px 0;
            position: relative;
        }
        .section-dark {
            background: var(--bg-section);
        }
        .section-dark-alt {
            background: var(--bg-dark);
        }
        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }
        .section-header h2 {
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--text-white) 40%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-header p {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-tag {
            display: inline-block;
            background: rgba(247, 201, 72, 0.12);
            color: var(--accent);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 1px;
            text-transform: uppercase;
            padding: 4px 16px;
            border-radius: 50px;
            margin-bottom: 16px;
            border: 1px solid var(--border-accent);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(11, 11, 26, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(11, 11, 26, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: 0.5px;
        }
        .site-logo .logo-icon {
            width: 38px;
            height: 38px;
            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;
            font-weight: 900;
            flex-shrink: 0;
        }
        .site-logo .logo-text {
            background: linear-gradient(135deg, var(--text-white) 30%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-logo .logo-sub {
            font-size: 0.7rem;
            font-weight: 400;
            color: var(--text-muted);
            -webkit-text-fill-color: var(--text-muted);
            display: block;
            margin-top: -2px;
            letter-spacing: 1px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .main-nav a {
            color: var(--text-light);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 6px 0;
            position: relative;
            transition: color var(--transition);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: width var(--transition);
        }
        .main-nav a:hover {
            color: var(--text-white);
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .main-nav a.active {
            color: var(--accent);
        }
        .main-nav a.active::after {
            width: 100%;
            background: var(--accent);
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff !important;
            padding: 10px 24px !important;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 4px 20px rgba(232, 76, 61, 0.3);
        }
        .nav-cta::after {
            display: none !important;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(232, 76, 61, 0.45);
            color: #fff !important;
        }
        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text-white);
            background: none;
            border: none;
            padding: 4px;
        }
        .nav-overlay {
            display: none;
        }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            padding: 120px 0 80px;
            overflow: hidden;
            background: var(--bg-dark);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            z-index: 0;
            animation: heroZoom 20s ease-in-out infinite alternate;
        }
        @keyframes heroZoom {
            0% {
                transform: scale(1);
            }
            100% {
                transform: scale(1.08);
            }
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(11, 11, 26, 0.55) 0%, var(--bg-dark) 85%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-content {
            max-width: 720px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(247, 201, 72, 0.12);
            border: 1px solid var(--border-accent);
            color: var(--accent);
            font-size: 0.85rem;
            font-weight: 600;
            padding: 6px 20px;
            border-radius: 50px;
            margin-bottom: 24px;
        }
        .hero-badge i {
            font-size: 0.7rem;
        }
        .hero h1 {
            font-size: 3.8rem;
            font-weight: 900;
            line-height: 1.1;
            margin-bottom: 20px;
            background: linear-gradient(135deg, var(--text-white) 30%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.2rem;
            color: var(--text-light);
            max-width: 580px;
            margin-bottom: 36px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 36px;
            border-radius: 50px;
            transition: transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 6px 25px rgba(232, 76, 61, 0.35);
            border: none;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(232, 76, 61, 0.5);
            color: #fff;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: var(--text-white);
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 36px;
            border-radius: 50px;
            border: 2px solid rgba(255, 255, 255, 0.2);
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.4);
            transform: translateY(-3px);
            color: var(--text-white);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            margin-top: 56px;
            padding-top: 32px;
            border-top: 1px solid var(--border-color);
        }
        .hero-stat h4 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
            margin-bottom: 2px;
        }
        .hero-stat span {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            border: 1px solid var(--border-color);
            transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-accent);
            box-shadow: var(--shadow-glow);
            background: var(--bg-card-hover);
        }
        .feature-icon {
            width: 60px;
            height: 60px;
            background: rgba(232, 76, 61, 0.12);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            margin: 0 auto 20px;
            transition: background var(--transition), color var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: rgba(232, 76, 61, 0.22);
            color: var(--accent);
        }
        .feature-card h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== Categories / Guides ===== */
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .category-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
        }
        .category-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-accent);
            box-shadow: var(--shadow-glow);
        }
        .category-card .card-img {
            height: 200px;
            background: center center / cover no-repeat;
            position: relative;
        }
        .category-card .card-img .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(11, 11, 26, 0.7) 0%, transparent 60%);
        }
        .category-card .card-body {
            padding: 24px 24px 28px;
        }
        .category-card .card-body h3 {
            font-size: 1.2rem;
            margin-bottom: 8px;
        }
        .category-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            line-height: 1.6;
        }
        .category-card .card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent);
            background: rgba(247, 201, 72, 0.1);
            padding: 2px 12px;
            border-radius: 50px;
            margin-bottom: 12px;
            border: 1px solid var(--border-accent);
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-weight: 600;
            font-size: 0.9rem;
            transition: gap var(--transition);
        }
        .card-link:hover {
            gap: 12px;
            color: var(--accent-light);
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .stat-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 40px 20px;
            border: 1px solid var(--border-color);
            transition: transform var(--transition), border-color var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-4px);
            border-color: var(--border-accent);
        }
        .stat-item .number {
            font-size: 2.8rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--accent), var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.1;
            margin-bottom: 6px;
        }
        .stat-item .label {
            font-size: 0.95rem;
            color: var(--text-muted);
        }

        /* ===== Process ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .process-grid::before {
            content: '';
            position: absolute;
            top: 44px;
            left: 8%;
            right: 8%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
            opacity: 0.25;
            z-index: 0;
        }
        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
            background: var(--bg-dark);
            padding: 0 8px;
        }
        .process-step .step-num {
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            margin: 0 auto 20px;
            box-shadow: 0 0 30px rgba(232, 76, 61, 0.25);
            position: relative;
        }
        .process-step .step-num::after {
            content: '';
            position: absolute;
            inset: -4px;
            border-radius: 50%;
            border: 2px solid rgba(232, 76, 61, 0.15);
        }
        .process-step h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ===== Latest News (CMS) ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
        }
        .news-card:hover {
            transform: translateY(-5px);
            border-color: var(--border-accent);
            box-shadow: var(--shadow-glow);
        }
        .news-card .news-img {
            height: 190px;
            background: center center / cover no-repeat;
            position: relative;
        }
        .news-card .news-img .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(11, 11, 26, 0.6) 0%, transparent 50%);
        }
        .news-card .news-cat {
            position: absolute;
            top: 16px;
            left: 16px;
            background: rgba(232, 76, 61, 0.85);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 600;
            padding: 3px 14px;
            border-radius: 50px;
            backdrop-filter: blur(4px);
            z-index: 2;
        }
        .news-card .news-body {
            padding: 20px 24px 24px;
        }
        .news-card .news-body .news-date {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: block;
            margin-bottom: 8px;
        }
        .news-card .news-body h3 {
            font-size: 1.08rem;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .news-body p {
            font-size: 0.88rem;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.6;
        }
        .news-card .news-body .news-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 14px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-color);
            color: var(--text-muted);
        }
        .news-empty i {
            font-size: 2.5rem;
            margin-bottom: 16px;
            opacity: 0.4;
        }

        /* ===== FAQ ===== */
        .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: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-accent);
        }
        .faq-item summary {
            padding: 20px 28px;
            font-size: 1.02rem;
            font-weight: 600;
            color: var(--text-white);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            list-style: none;
            transition: color var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary i {
            color: var(--accent);
            font-size: 0.9rem;
            transition: transform var(--transition);
        }
        .faq-item[open] summary i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 28px 20px;
            color: var(--text-muted);
            line-height: 1.7;
            font-size: 0.95rem;
        }
        .faq-item .faq-answer p {
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(232, 76, 61, 0.08), rgba(247, 201, 72, 0.06));
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .cta-box {
            background: var(--bg-card);
            border-radius: var(--radius-xl);
            padding: 64px 48px;
            border: 1px solid var(--border-accent);
            text-align: center;
            max-width: 860px;
            margin: 0 auto;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -30%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(232, 76, 61, 0.06), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-box h2 {
            font-size: 2.2rem;
            margin-bottom: 16px;
        }
        .cta-box p {
            color: var(--text-muted);
            max-width: 520px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
        }
        .cta-box .btn-primary {
            font-size: 1.1rem;
            padding: 16px 44px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-section);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .site-logo {
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 1rem;
            margin-bottom: 18px;
            color: var(--text-white);
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 1rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            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(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            h1 {
                font-size: 2.6rem;
            }
            h2 {
                font-size: 2rem;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .categories-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid::before {
                display: none;
            }
            .process-step {
                padding: 16px;
                background: var(--bg-card);
                border-radius: var(--radius-md);
                border: 1px solid var(--border-color);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero h1 {
                font-size: 2.8rem;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 60px 0;
            }
            .main-nav {
                position: fixed;
                top: 0;
                right: -300px;
                width: 280px;
                height: 100vh;
                background: var(--bg-dark);
                flex-direction: column;
                padding: 80px 32px 40px;
                gap: 20px;
                border-left: 1px solid var(--border-color);
                transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                z-index: 1001;
                align-items: flex-start;
                box-shadow: -10px 0 40px rgba(0, 0, 0, 0.5);
            }
            .main-nav.open {
                right: 0;
            }
            .main-nav a {
                font-size: 1.1rem;
            }
            .main-nav .nav-cta {
                margin-top: 8px;
            }
            .nav-toggle {
                display: block;
                z-index: 1002;
            }
            .nav-overlay {
                display: block;
                position: fixed;
                inset: 0;
                background: rgba(0, 0, 0, 0.6);
                z-index: 999;
                opacity: 0;
                pointer-events: none;
                transition: opacity 0.4s;
            }
            .nav-overlay.open {
                opacity: 1;
                pointer-events: auto;
            }
            .hero {
                min-height: 90vh;
                padding: 100px 0 60px;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat h4 {
                font-size: 1.6rem;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .categories-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item {
                padding: 28px 16px;
            }
            .stat-item .number {
                font-size: 2.2rem;
            }
            .process-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .section-header {
                margin-bottom: 36px;
            }
            .section-header h2 {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                justify-content: center;
                text-align: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .cta-box {
                padding: 32px 20px;
            }
            .cta-box h2 {
                font-size: 1.4rem;
            }
            .news-card .news-body {
                padding: 16px 18px 20px;
            }
            .faq-item summary {
                padding: 16px 20px;
                font-size: 0.95rem;
            }
            .faq-item .faq-answer {
                padding: 0 20px 16px;
            }
            .section {
                padding: 48px 0;
            }
            .stat-item .number {
                font-size: 1.8rem;
            }
        }

        /* ===== Animations ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeInUp 0.7s ease forwards;
        }
        .animate-delay-1 {
            animation-delay: 0.1s;
        }
        .animate-delay-2 {
            animation-delay: 0.2s;
        }
        .animate-delay-3 {
            animation-delay: 0.3s;
        }
        .animate-delay-4 {
            animation-delay: 0.4s;
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.15);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: rgba(255, 255, 255, 0.25);
        }

        /* ===== Focus ===== */
        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a56db;
            --primary-dark: #1e40af;
            --primary-light: #3b82f6;
            --primary-gradient: linear-gradient(135deg, #1a56db 0%, #3b82f6 100%);
            --secondary: #f59e0b;
            --secondary-dark: #d97706;
            --secondary-light: #fbbf24;
            --accent: #ef4444;
            --accent-light: #f87171;

            --bg-dark: #0f172a;
            --bg-dark2: #1e293b;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-section-alt: #f1f5f9;

            --text-primary: #1e293b;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-white: #ffffff;
            --text-link: #1a56db;

            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --border-focus: #3b82f6;

            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.10), 0 4px 16px rgba(0,0,0,0.06);
            --shadow-xl: 0 16px 48px rgba(0,0,0,0.14);
            --shadow-glow: 0 0 24px rgba(26,86,219,0.18);

            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --radius-full: 9999px;

            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-fast: 0.15s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

            --nav-height: 72px;
            --container-max: 1200px;
            --grid-gap: 28px;
        }

        /* ===== 基础 Reset ===== */
        *, *::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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-light);
            min-height: 100vh;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--text-link); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }
        input, textarea, select { font-family: inherit; font-size: 1rem; }
        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: clamp(2.2rem, 5vw, 3.4rem); }
        h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
        h3 { font-size: clamp(1.2rem, 2.2vw, 1.6rem); }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        p:last-child { margin-bottom: 0; }
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--nav-height);
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled { box-shadow: var(--shadow-md); }
        .header-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            transition: opacity var(--transition);
        }
        .site-logo:hover { opacity: 0.85; color: var(--text-primary); }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--primary-gradient);
            color: #fff;
            font-size: 1.2rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
            box-shadow: 0 2px 8px rgba(26,86,219,0.25);
        }
        .logo-text { font-size: 1.2rem; }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav a {
            position: relative;
            padding: 8px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }
        .main-nav a:hover { color: var(--primary); background: rgba(26,86,219,0.06); }
        .main-nav a.active {
            color: var(--primary);
            background: rgba(26,86,219,0.10);
            font-weight: 600;
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary-gradient);
            border-radius: var(--radius-full);
        }
        .main-nav a.nav-cta {
            background: var(--primary-gradient);
            color: #fff;
            padding: 10px 24px;
            border-radius: var(--radius-full);
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(26,86,219,0.30);
            transition: all var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .main-nav a.nav-cta:hover {
            box-shadow: 0 6px 20px rgba(26,86,219,0.40);
            transform: translateY(-1px);
            color: #fff;
            background: linear-gradient(135deg, #1e40af 0%, #1a56db 100%);
        }
        .main-nav a.nav-cta i { font-size: 0.85rem; }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--text-primary);
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover { background: rgba(0,0,0,0.04); }

        /* ===== 移动端导航 ===== */
        @media (max-width: 768px) {
            .main-nav {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 24px 28px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.4s cubic-bezier(0.4,0,0.2,1);
                border-radius: 0 0 var(--radius-md) var(--radius-md);
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .main-nav a {
                width: 100%;
                padding: 12px 16px;
                font-size: 1.05rem;
                border-radius: var(--radius-sm);
            }
            .main-nav a.active::after { display: none; }
            .main-nav a.active { background: rgba(26,86,219,0.08); }
            .main-nav a.nav-cta {
                justify-content: center;
                margin-top: 8px;
                padding: 14px 24px;
            }
            .nav-toggle { display: flex; }
        }

        /* ===== 页面 Banner ===== */
        .page-banner {
            position: relative;
            padding: 120px 0 80px;
            margin-top: var(--nav-height);
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.20;
            mix-blend-mode: overlay;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.88) 0%, rgba(30,41,59,0.70) 100%);
        }
        .banner-particles {
            position: absolute;
            inset: 0;
            overflow: hidden;
            pointer-events: none;
        }
        .banner-particles span {
            position: absolute;
            width: 6px;
            height: 6px;
            background: var(--primary-light);
            border-radius: 50%;
            opacity: 0.2;
            animation: float 12s infinite ease-in-out;
        }
        .banner-particles span:nth-child(1) { top: 20%; left: 10%; animation-delay: 0s; width: 8px; height: 8px; }
        .banner-particles span:nth-child(2) { top: 60%; left: 30%; animation-delay: 2s; width: 5px; height: 5px; }
        .banner-particles span:nth-child(3) { top: 30%; right: 20%; animation-delay: 4s; width: 10px; height: 10px; }
        .banner-particles span:nth-child(4) { bottom: 30%; right: 40%; animation-delay: 6s; width: 6px; height: 6px; }
        .banner-particles span:nth-child(5) { top: 70%; left: 60%; animation-delay: 8s; width: 4px; height: 4px; }
        .banner-particles span:nth-child(6) { top: 15%; right: 60%; animation-delay: 10s; width: 7px; height: 7px; }
        @keyframes float {
            0%, 100% { transform: translateY(0) scale(1); opacity: 0.15; }
            50% { transform: translateY(-30px) scale(1.3); opacity: 0.35; }
        }
        .banner-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }
        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(245,158,11,0.18);
            color: var(--secondary-light);
            padding: 6px 18px;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 20px;
            border: 1px solid rgba(245,158,11,0.20);
            backdrop-filter: blur(4px);
        }
        .banner-badge i { font-size: 0.75rem; }
        .banner-content h1 {
            color: var(--text-white);
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
            text-shadow: 0 2px 20px rgba(0,0,0,0.30);
        }
        .banner-content p {
            color: rgba(255,255,255,0.75);
            font-size: 1.15rem;
            max-width: 640px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .banner-search {
            display: flex;
            max-width: 520px;
            margin: 0 auto;
            background: rgba(255,255,255,0.12);
            border-radius: var(--radius-full);
            border: 1px solid rgba(255,255,255,0.15);
            overflow: hidden;
            backdrop-filter: blur(8px);
            transition: all var(--transition);
        }
        .banner-search:focus-within {
            border-color: var(--primary-light);
            background: rgba(255,255,255,0.18);
            box-shadow: 0 0 0 4px rgba(59,130,246,0.15);
        }
        .banner-search input {
            flex: 1;
            padding: 14px 22px;
            background: transparent;
            border: none;
            color: var(--text-white);
            font-size: 0.95rem;
            outline: none;
        }
        .banner-search input::placeholder { color: rgba(255,255,255,0.45); }
        .banner-search button {
            padding: 14px 24px;
            background: var(--primary-gradient);
            color: #fff;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition);
        }
        .banner-search button:hover { background: linear-gradient(135deg, #1e40af 0%, #1a56db 100%); }

        /* ===== 板块通用 ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-section-alt); }
        .section-dark { background: var(--bg-dark); }
        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 48px;
        }
        .section-header h2 { margin-bottom: 12px; }
        .section-header p { font-size: 1.05rem; color: var(--text-muted); }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: rgba(26,86,219,0.08);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: var(--radius-full);
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        /* ===== 分类标签 ===== */
        .category-tabs {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-bottom: 48px;
        }
        .category-tab {
            padding: 10px 24px;
            border-radius: var(--radius-full);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-white);
            border: 1px solid var(--border);
            transition: all var(--transition);
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .category-tab:hover { border-color: var(--primary-light); color: var(--primary); background: rgba(26,86,219,0.04); }
        .category-tab.active {
            background: var(--primary-gradient);
            color: #fff;
            border-color: transparent;
            box-shadow: 0 4px 16px rgba(26,86,219,0.25);
        }
        .category-tab i { font-size: 0.8rem; }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: var(--grid-gap);
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--border);
        }
        .card-image {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--bg-dark2);
        }
        .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card:hover .card-image img { transform: scale(1.05); }
        .card-image .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(239,68,68,0.92);
            color: #fff;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            font-size: 0.72rem;
            font-weight: 600;
            backdrop-filter: blur(4px);
        }
        .card-image .card-badge.hot { background: rgba(245,158,11,0.92); }
        .card-image .card-badge.new { background: rgba(26,86,219,0.92); }
        .card-body { padding: 20px 22px 24px; }
        .card-body h3 { margin-bottom: 8px; font-weight: 700; }
        .card-body h3 a { color: var(--text-primary); transition: color var(--transition); }
        .card-body h3 a:hover { color: var(--primary); }
        .card-body p { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 16px; line-height: 1.7; }
        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.82rem;
            color: var(--text-muted);
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
        }
        .card-meta span { display: flex; align-items: center; gap: 4px; }
        .card-meta i { font-size: 0.75rem; }

        /* ===== 排行榜 ===== */
        .rank-wrapper {
            max-width: 820px;
            margin: 0 auto;
        }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 20px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .rank-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
            border-color: var(--border);
        }
        .rank-number {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--text-muted);
            background: var(--bg-light);
            border-radius: var(--radius-sm);
            font-family: var(--font-mono);
        }
        .rank-item:nth-child(1) .rank-number { background: linear-gradient(135deg, #f59e0b, #f97316); color: #fff; }
        .rank-item:nth-child(2) .rank-number { background: linear-gradient(135deg, #94a3b8, #64748b); color: #fff; }
        .rank-item:nth-child(3) .rank-number { background: linear-gradient(135deg, #d97706, #b45309); color: #fff; }
        .rank-info { flex: 1; min-width: 0; }
        .rank-info h4 { font-size: 1rem; font-weight: 600; margin-bottom: 2px; }
        .rank-info p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }
        .rank-stats {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .rank-stats i { color: var(--secondary); font-size: 0.8rem; }
        .rank-stats .hotness {
            display: inline-flex;
            align-items: center;
            gap: 3px;
            padding: 2px 12px;
            background: rgba(245,158,11,0.10);
            color: var(--secondary-dark);
            border-radius: var(--radius-full);
            font-size: 0.75rem;
            font-weight: 600;
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            position: relative;
            transition: all var(--transition);
        }
        .step-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .step-card::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-gradient);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 700;
            border-radius: 50%;
            box-shadow: 0 2px 12px rgba(26,86,219,0.25);
        }
        .step-icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 16px;
            margin-top: 4px;
        }
        .step-card h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
        .step-card p { font-size: 0.88rem; color: var(--text-muted); margin: 0; }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-md); }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            transition: background var(--transition);
            gap: 12px;
        }
        .faq-question:hover { background: rgba(26,86,219,0.02); }
        .faq-question i { color: var(--primary); font-size: 0.85rem; transition: transform var(--transition); }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .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: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            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: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
            padding: 20px 0;
        }
        .cta-content h2 { color: var(--text-white); margin-bottom: 16px; }
        .cta-content p { color: rgba(255,255,255,0.70); font-size: 1.05rem; margin-bottom: 32px; }
        .cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--primary-gradient);
            color: #fff;
            box-shadow: 0 4px 16px rgba(26,86,219,0.30);
        }
        .btn-primary:hover { box-shadow: 0 8px 28px rgba(26,86,219,0.40); transform: translateY(-2px); color: #fff; }
        .btn-secondary {
            background: rgba(255,255,255,0.10);
            color: var(--text-white);
            border: 1px solid rgba(255,255,255,0.20);
            backdrop-filter: blur(4px);
        }
        .btn-secondary:hover { background: rgba(255,255,255,0.18); color: #fff; border-color: rgba(255,255,255,0.30); }
        .btn-sm { padding: 10px 20px; font-size: 0.85rem; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0b1120;
            color: rgba(255,255,255,0.70);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand .site-logo { color: #fff; margin-bottom: 16px; display: inline-flex; }
        .footer-brand p { font-size: 0.88rem; color: rgba(255,255,255,0.50); line-height: 1.8; margin-bottom: 20px; max-width: 360px; }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255,255,255,0.06);
            border-radius: var(--radius-sm);
            color: rgba(255,255,255,0.50);
            font-size: 1.1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        .footer-col h4 { color: #fff; font-size: 0.95rem; font-weight: 700; margin-bottom: 18px; letter-spacing: 0.3px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a {
            color: rgba(255,255,255,0.50);
            font-size: 0.88rem;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .footer-col ul li a:hover { color: var(--primary-light); transform: translateX(3px); }
        .footer-bottom {
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a { color: rgba(255,255,255,0.45); }
        .footer-bottom a:hover { color: var(--primary-light); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-brand { grid-column: 1 / -1; }
            .section { padding: 64px 0; }
        }
        @media (max-width: 768px) {
            .page-banner { padding: 100px 0 60px; min-height: 300px; }
            .banner-content h1 { font-size: 2rem; }
            .banner-content p { font-size: 1rem; }
            .banner-search { flex-direction: column; border-radius: var(--radius-md); }
            .banner-search input { padding: 14px 18px; text-align: center; }
            .banner-search button { justify-content: center; padding: 14px; }
            .card-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 20px; }
            .steps-grid { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 20px; }
            .section { padding: 48px 0; }
            .section-header { margin-bottom: 32px; }
            .cta-content h2 { font-size: 1.6rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .rank-item { flex-wrap: wrap; gap: 12px; }
            .rank-stats { width: 100%; justify-content: flex-start; padding-left: 56px; }
            .faq-question { padding: 14px 18px; font-size: 0.92rem; }
        }
        @media (max-width: 520px) {
            :root { --grid-gap: 16px; }
            .container { padding: 0 16px; }
            .page-banner { padding: 84px 0 48px; min-height: 260px; }
            .banner-content h1 { font-size: 1.65rem; }
            .banner-badge { font-size: 0.75rem; padding: 4px 14px; }
            .category-tabs { gap: 6px; }
            .category-tab { padding: 8px 16px; font-size: 0.82rem; }
            .card-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
            .step-card { padding: 24px 16px; }
            .step-icon { font-size: 1.8rem; }
            .cta-buttons { flex-direction: column; align-items: stretch; }
            .btn { justify-content: center; }
            .rank-item { padding: 12px 16px; }
            .footer-grid { gap: 20px; }
        }

        /* ===== 辅助 ===== */
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mb-16 { margin-bottom: 16px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #FF6B35;
            --primary-dark: #E55A2B;
            --primary-light: #FF8F5E;
            --secondary: #1A1A2E;
            --secondary-light: #2D2D4A;
            --accent: #FFD700;
            --accent-dark: #E6C200;
            --bg-light: #F8F9FA;
            --bg-dark: #0F0F1A;
            --bg-card: #FFFFFF;
            --text-dark: #1A1A2E;
            --text-light: #F0F0F5;
            --text-muted: #6C757D;
            --text-body: #2D2D3F;
            --border: #E8ECF0;
            --border-light: #F0F2F5;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-glow: 0 0 30px rgba(255,107,53,0.15);
            --font: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-light);
            overflow-x: hidden;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
        button { cursor: pointer; background: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-dark); font-weight: 700; line-height: 1.3; }
        h1 { font-size: 2.4rem; letter-spacing: -0.02em; }
        h2 { font-size: 1.8rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1em; }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 15, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            height: var(--header-height);
            transition: var(--transition);
        }
        .site-header.scrolled { background: rgba(15, 15, 26, 0.98); box-shadow: 0 4px 30px rgba(0,0,0,0.3); }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            flex-shrink: 0;
        }
        .site-logo:hover { opacity: 0.9; }
        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 900;
            color: #fff;
            box-shadow: 0 4px 12px rgba(255,107,53,0.3);
        }
        .logo-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.02em;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav a {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }
        .main-nav a:hover { color: #fff; background: rgba(255,255,255,0.08); }
        .main-nav a.active {
            color: #fff;
            background: rgba(255,107,53,0.2);
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .main-nav .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff !important;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            box-shadow: 0 4px 15px rgba(255,107,53,0.3);
            margin-left: 8px;
        }
        .main-nav .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(255,107,53,0.4);
        }
        .main-nav .nav-cta i { margin-right: 6px; }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.4rem;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover { background: rgba(255,255,255,0.08); }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            padding: 140px 0 80px;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            min-height: 380px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,15,26,0.92) 0%, rgba(15,15,26,0.7) 50%, rgba(255,107,53,0.15) 100%);
            z-index: 1;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-light), transparent);
            z-index: 2;
        }
        .article-hero .container { position: relative; z-index: 3; }
        .article-hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.6);
            margin-bottom: 20px;
        }
        .article-hero-breadcrumb a { color: rgba(255,255,255,0.7); }
        .article-hero-breadcrumb a:hover { color: var(--accent); }
        .article-hero-breadcrumb span { color: rgba(255,255,255,0.4); }
        .article-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255,107,53,0.25);
            color: var(--accent);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 16px;
            border: 1px solid rgba(255,107,53,0.2);
        }
        .article-hero-badge i { font-size: 0.75rem; }
        .article-hero h1 {
            color: #fff;
            font-size: 2.8rem;
            font-weight: 900;
            line-height: 1.25;
            max-width: 900px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
            margin-bottom: 20px;
        }
        .article-hero-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
        }
        .article-hero-meta span { display: flex; align-items: center; gap: 6px; }
        .article-hero-meta i { color: var(--primary-light); }
        .article-hero-meta .author-avatar {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 60px 0 40px;
            position: relative;
            z-index: 3;
            margin-top: -40px;
        }
        .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);
            box-shadow: var(--shadow-md);
            padding: 48px;
            border: 1px solid var(--border);
        }
        .article-body .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 32px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border-light);
        }
        .article-body .article-tags a {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 6px 16px;
            background: var(--bg-light);
            border-radius: 20px;
            font-size: 0.82rem;
            color: var(--text-muted);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .article-body .article-tags a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-1px);
        }
        .article-body .article-content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-body);
        }
        .article-body .article-content p { margin-bottom: 1.4em; }
        .article-body .article-content h2, 
        .article-body .article-content h3 { margin-top: 1.6em; margin-bottom: 0.6em; }
        .article-body .article-content img { 
            border-radius: var(--radius-md); 
            margin: 1.8em 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body .article-content blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            margin: 1.6em 0;
            background: rgba(255,107,53,0.05);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-muted);
            font-style: italic;
        }
        .article-body .article-content ul, 
        .article-body .article-content ol {
            margin: 1em 0;
            padding-left: 24px;
        }
        .article-body .article-content ul li { 
            list-style: disc; 
            margin-bottom: 0.4em;
        }
        .article-body .article-content ol li { 
            list-style: decimal; 
            margin-bottom: 0.4em;
        }
        .article-body .article-content a { 
            color: var(--primary); 
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body .article-content a:hover { color: var(--primary-dark); }
        .article-body .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }
        .article-body .article-share span { font-size: 0.9rem; color: var(--text-muted); font-weight: 500; }
        .article-body .article-share a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-light);
            color: var(--text-muted);
            border: 1px solid var(--border);
            transition: var(--transition);
            font-size: 1rem;
        }
        .article-body .article-share a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(255,107,53,0.3);
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 28px;
            border: 1px solid var(--border);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); }
        .sidebar-list li { margin-bottom: 4px; }
        .sidebar-list a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-body);
            font-size: 0.92rem;
            transition: var(--transition);
        }
        .sidebar-list a:hover {
            background: rgba(255,107,53,0.06);
            color: var(--primary);
            transform: translateX(4px);
        }
        .sidebar-list a .badge {
            margin-left: auto;
            background: var(--bg-light);
            color: var(--text-muted);
            padding: 2px 10px;
            border-radius: 12px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
            color: #fff;
            padding: 32px 28px;
            border-radius: var(--radius-md);
            text-align: center;
            border: none;
        }
        .sidebar-cta h3 { color: #fff; border-bottom-color: rgba(255,255,255,0.1); }
        .sidebar-cta h3 i { color: var(--accent); }
        .sidebar-cta p { color: rgba(255,255,255,0.7); font-size: 0.9rem; margin-bottom: 20px; }
        .sidebar-cta .btn {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 15px rgba(255,107,53,0.3);
            transition: var(--transition);
        }
        .sidebar-cta .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(255,107,53,0.4);
        }

        /* ===== Article Navigation ===== */
        .article-nav-section {
            padding: 40px 0 0;
        }
        .article-nav-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .article-nav-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .article-nav-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--primary-light);
        }
        .article-nav-item .label {
            font-size: 0.78rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            font-weight: 600;
            display: block;
            margin-bottom: 6px;
        }
        .article-nav-item .title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-dark);
            line-height: 1.4;
        }
        .article-nav-item.next { text-align: right; }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-light);
        }
        .related-section .section-title {
            text-align: center;
            margin-bottom: 40px;
        }
        .related-section .section-title h2 { font-size: 1.8rem; }
        .related-section .section-title p { color: var(--text-muted); font-size: 1rem; margin-top: 8px; }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(255,107,53,0.2);
        }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 20px;
        }
        .related-card .card-body .cat {
            font-size: 0.75rem;
            color: var(--primary);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        .related-card .card-body h4 {
            font-size: 1rem;
            font-weight: 600;
            margin: 6px 0 10px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h4 a { color: var(--text-dark); }
        .related-card .card-body h4 a:hover { color: var(--primary); }
        .related-card .card-body .meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: 60px 0;
            background: var(--bg-card);
        }
        .faq-section .section-title { text-align: center; margin-bottom: 40px; }
        .faq-section .section-title h2 { font-size: 1.8rem; }
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-light);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: rgba(255,107,53,0.2); }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            color: var(--text-dark);
            font-size: 1rem;
            transition: var(--transition);
            user-select: none;
        }
        .faq-question:hover { color: var(--primary); }
        .faq-question i { 
            color: var(--primary); 
            transition: var(--transition); 
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: var(--transition);
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            padding: 0 24px 20px;
            max-height: 300px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,15,26,0.92) 0%, rgba(255,107,53,0.2) 100%);
        }
        .cta-section .container { position: relative; z-index: 2; text-align: center; }
        .cta-section h2 {
            color: #fff;
            font-size: 2.2rem;
            font-weight: 900;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.7);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cta-section .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            padding: 16px 40px;
            border-radius: var(--radius-sm);
            font-size: 1.05rem;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            box-shadow: 0 8px 30px rgba(255,107,53,0.35);
            transition: var(--transition);
        }
        .cta-section .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(255,107,53,0.5);
        }
        .cta-section .btn-secondary {
            background: rgba(255,255,255,0.1);
            color: #fff;
            padding: 16px 40px;
            border-radius: var(--radius-sm);
            font-size: 1.05rem;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            border: 1px solid rgba(255,255,255,0.2);
            transition: var(--transition);
        }
        .cta-section .btn-secondary:hover {
            background: rgba(255,255,255,0.2);
            border-color: rgba(255,255,255,0.4);
            transform: translateY(-3px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 0;
            border-top: 1px solid rgba(255,255,255,0.05);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand .site-logo { margin-bottom: 16px; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.6); margin-bottom: 20px; }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.6);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 20px;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul a {
            color: rgba(255,255,255,0.55);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col ul a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== Error State ===== */
        .error-state {
            text-align: center;
            padding: 100px 24px;
            min-height: 50vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        .error-state .error-icon {
            font-size: 4rem;
            color: var(--primary);
            margin-bottom: 24px;
            opacity: 0.6;
        }
        .error-state h2 { font-size: 2rem; margin-bottom: 12px; }
        .error-state p { color: var(--text-muted); font-size: 1.05rem; margin-bottom: 24px; }
        .error-state .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: var(--transition);
        }
        .error-state .btn-home:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(255,107,53,0.3);
        }

        /* ===== Not Found Page ===== */
        .not-found-page .article-hero { min-height: 200px; padding: 120px 0 60px; }
        .not-found-page .article-hero h1 { font-size: 1.8rem; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .article-hero h1 { font-size: 2.2rem; }
        }
        @media (max-width: 768px) {
            :root { --header-height: 64px; }
            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(15,15,26,0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px;
                gap: 6px;
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 1px solid rgba(255,255,255,0.06);
                box-shadow: 0 20px 40px rgba(0,0,0,0.4);
                pointer-events: none;
            }
            .main-nav.open { transform: translateY(0); opacity: 1; pointer-events: all; }
            .main-nav a { width: 100%; text-align: center; padding: 14px; font-size: 1rem; }
            .main-nav .nav-cta { margin-left: 0; margin-top: 8px; }
            .nav-toggle { display: flex; }
            .article-hero { padding: 110px 0 60px; min-height: 300px; }
            .article-hero h1 { font-size: 1.6rem; }
            .article-hero-meta { gap: 12px; font-size: 0.82rem; flex-wrap: wrap; }
            .article-body { padding: 28px 20px; }
            .article-nav-grid { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-section h2 { font-size: 1.6rem; }
            .cta-section .btn-primary, .cta-section .btn-secondary { width: 100%; justify-content: center; }
            .sidebar-card { padding: 20px; }
            .article-hero-breadcrumb { font-size: 0.75rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-hero h1 { font-size: 1.3rem; }
            .article-body { padding: 20px 16px; }
            .article-body .article-content { font-size: 0.95rem; }
            .article-nav-item { padding: 16px 20px; }
            .article-nav-item .title { font-size: 0.9rem; }
            .related-card .card-img { height: 160px; }
            .faq-question { padding: 16px 18px; font-size: 0.9rem; }
            .cta-section h2 { font-size: 1.3rem; }
            .cta-section p { font-size: 0.95rem; }
            .footer-col h4 { font-size: 0.95rem; }
            .error-state { padding: 60px 16px; }
            .error-state h2 { font-size: 1.5rem; }
        }