/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #4a6cf7;
            --primary-dark: #3b5de7;
            --primary-light: #eef1ff;
            --secondary: #7c3aed;
            --secondary-light: #f3eeff;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --text: #1e293b;
            --text-secondary: #475569;
            --text-light: #94a3b8;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(74, 108, 247, 0.08);
            --shadow-hover: 0 12px 40px rgba(74, 108, 247, 0.14);
            --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.04);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 240px;
            --sidebar-collapsed: 72px;
            --header-height: 64px;
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            display: flex;
            min-height: 100vh;
        }
        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);
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: var(--text);
            font-weight: 700;
        }
        p {
            color: var(--text-secondary);
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 32px;
            width: 100%;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 20px;
            }
        }

        /* ===== 左侧导航 Sidebar ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg);
            border-right: 1px solid var(--border);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            padding: 0;
            transition: transform var(--transition), width var(--transition);
            overflow-y: auto;
            overflow-x: hidden;
        }
        .sidebar-brand {
            padding: 28px 24px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-brand .brand-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            flex-shrink: 0;
        }
        .sidebar-brand .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.5px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .sidebar-nav {
            flex: 1;
            padding: 16px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 15px;
            transition: var(--transition);
            position: relative;
        }
        .sidebar-nav a i {
            width: 22px;
            text-align: center;
            font-size: 18px;
            flex-shrink: 0;
        }
        .sidebar-nav a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .sidebar-nav a.active {
            background: var(--primary);
            color: var(--text-white);
            box-shadow: 0 4px 12px rgba(74, 108, 247, 0.3);
        }
        .sidebar-nav a.active:hover {
            background: var(--primary-dark);
            color: var(--text-white);
        }
        .sidebar-nav .nav-label {
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .sidebar-footer {
            padding: 16px 24px;
            border-top: 1px solid var(--border-light);
            font-size: 12px;
            color: var(--text-light);
            text-align: center;
        }

        /* ===== 主内容区 ===== */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            transition: margin-left var(--transition);
        }
        .main-content {
            flex: 1;
        }

        /* ===== 移动端顶部栏 ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: var(--bg);
            border-bottom: 1px solid var(--border);
            z-index: 999;
            padding: 0 20px;
            align-items: center;
            justify-content: space-between;
        }
        .mobile-header .brand-text {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
        }
        .mobile-header .hamburger {
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text);
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .mobile-header .hamburger:hover {
            background: var(--bg-alt);
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition);
            pointer-events: none;
        }
        .sidebar-overlay.show {
            opacity: 1;
            pointer-events: auto;
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            padding: 120px 0 100px;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
            overflow: hidden;
            min-height: 520px;
            display: flex;
            align-items: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(74, 108, 247, 0.15) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(124, 58, 237, 0.12) 0%, transparent 60%);
            pointer-events: none;
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-content {
            max-width: 720px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 24px;
            letter-spacing: 0.3px;
        }
        .hero-badge i {
            color: var(--accent);
            font-size: 14px;
        }
        .hero h1 {
            font-size: 52px;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero h1 span {
            background: linear-gradient(135deg, #818cf8, #a78bfa);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 20px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 580px;
            margin-bottom: 36px;
            line-height: 1.6;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-actions .btn-primary {
            padding: 14px 36px;
            font-size: 17px;
            font-weight: 600;
            border-radius: 40px;
            background: var(--primary);
            color: #fff;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 8px 30px rgba(74, 108, 247, 0.35);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .hero-actions .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 40px rgba(74, 108, 247, 0.45);
        }
        .hero-actions .btn-outline {
            padding: 14px 36px;
            font-size: 17px;
            font-weight: 600;
            border-radius: 40px;
            background: transparent;
            color: rgba(255, 255, 255, 0.9);
            border: 1.5px solid rgba(255, 255, 255, 0.25);
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .hero-actions .btn-outline:hover {
            border-color: rgba(255, 255, 255, 0.5);
            background: rgba(255, 255, 255, 0.06);
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 56px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-stats .stat-item {
            text-align: left;
        }
        .hero-stats .stat-number {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.5px;
        }
        .hero-stats .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 2px;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-header {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 56px;
        }
        .section-header h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: -0.3px;
        }
        .section-header p {
            font-size: 18px;
            color: var(--text-light);
        }
        .section-header .subtitle-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 22px;
            margin-bottom: 16px;
        }

        /* ===== 优势卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 36px 28px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .feature-card .icon-wrap {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            margin: 0 auto 20px;
            color: #fff;
        }
        .feature-card .icon-wrap.blue {
            background: linear-gradient(135deg, #4a6cf7, #6366f1);
        }
        .feature-card .icon-wrap.purple {
            background: linear-gradient(135deg, #7c3aed, #8b5cf6);
        }
        .feature-card .icon-wrap.amber {
            background: linear-gradient(135deg, #f59e0b, #f97316);
        }
        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .category-card {
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .category-card .card-img {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .category-card .card-img .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.5), transparent);
        }
        .category-card .card-body {
            padding: 24px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card .card-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .category-card .card-body p {
            font-size: 15px;
            color: var(--text-light);
            margin-bottom: 16px;
            flex: 1;
        }
        .category-card .card-body .btn-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            color: var(--primary);
            font-size: 15px;
        }
        .category-card .card-body .btn-link:hover {
            gap: 12px;
            color: var(--primary-dark);
        }

        /* ===== 最新资讯 (CMS) ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px 28px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            display: block;
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .news-card .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 10px;
            font-size: 13px;
        }
        .news-card .meta .tag {
            background: var(--primary-light);
            color: var(--primary);
            padding: 2px 14px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 12px;
        }
        .news-card .meta time {
            color: var(--text-light);
        }
        .news-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
            line-height: 1.4;
        }
        .news-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--text-light);
            font-size: 16px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }
        .news-empty i {
            font-size: 36px;
            color: var(--text-light);
            margin-bottom: 12px;
            display: block;
        }

        /* ===== 使用流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 12%;
            right: 12%;
            height: 2px;
            background: linear-gradient(to right, var(--primary-light), var(--secondary-light));
            z-index: 0;
        }
        .step-item {
            text-align: center;
            position: relative;
            z-index: 1;
            background: var(--bg);
            padding: 0 12px;
        }
        .step-item .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 800;
            margin: 0 auto 20px;
            box-shadow: 0 8px 24px rgba(74, 108, 247, 0.25);
        }
        .step-item h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-light);
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }
        .stats-item .stat-icon {
            font-size: 32px;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .stats-item .stat-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.5px;
            line-height: 1.1;
        }
        .stats-item .stat-number .suffix {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-light);
        }
        .stats-item .stat-label {
            font-size: 15px;
            color: var(--text-light);
            margin-top: 6px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-item summary {
            padding: 20px 24px;
            font-weight: 600;
            font-size: 16px;
            color: var(--text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            list-style: none;
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f107';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 18px;
            color: var(--text-light);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-item[open] summary {
            color: var(--primary);
            background: var(--primary-light);
        }
        .faq-item .answer {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, #1e293b, #0f172a);
            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: 0.12;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 14px;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 540px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            padding: 16px 44px;
            font-size: 18px;
            font-weight: 700;
            border-radius: 40px;
            background: var(--primary);
            color: #fff;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 8px 30px rgba(74, 108, 247, 0.4);
        }
        .cta-section .btn-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 14px 44px rgba(74, 108, 247, 0.5);
        }
        .cta-section .btn-cta i {
            font-size: 20px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0f172a;
            padding: 48px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-brand .brand-text i {
            color: var(--primary);
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }

        /* ===== 按钮通用 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-weight: 600;
            border-radius: 40px;
            font-size: 15px;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            text-align: center;
            justify-content: center;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(74, 108, 247, 0.25);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(74, 108, 247, 0.35);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 标签 ===== */
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary);
        }
        .tag.purple {
            background: var(--secondary-light);
            color: var(--secondary);
        }
        .tag.amber {
            background: var(--accent-light);
            color: var(--accent);
        }

        /* ===== 分隔线 ===== */
        .divider {
            height: 1px;
            background: var(--border);
            margin: 0;
            border: none;
        }

        /* ===== 响应式 ===== */

        /* 平板 1024px */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
            .steps-grid::before {
                display: none;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .hero h1 {
                font-size: 40px;
            }
            .hero p {
                font-size: 18px;
            }
        }

        /* 平板 768px */
        @media (max-width: 768px) {
            body {
                flex-direction: column;
            }
            .sidebar {
                transform: translateX(-100%);
                width: 280px;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .main-wrapper {
                margin-left: 0;
                padding-top: var(--header-height);
            }
            .mobile-header {
                display: flex;
            }
            .sidebar-overlay {
                display: block;
            }

            .hero {
                padding: 80px 0 60px;
                min-height: auto;
            }
            .hero h1 {
                font-size: 32px;
            }
            .hero p {
                font-size: 16px;
            }
            .hero-stats {
                flex-wrap: wrap;
                gap: 24px;
            }
            .hero-stats .stat-number {
                font-size: 26px;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline {
                padding: 12px 28px;
                font-size: 15px;
            }

            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .section-header p {
                font-size: 16px;
            }

            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .stats-item .stat-number {
                font-size: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .cta-section p {
                font-size: 16px;
            }
            .cta-section .btn-cta {
                padding: 14px 32px;
                font-size: 16px;
            }
        }

        /* 手机 520px */
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero h1 {
                font-size: 26px;
            }
            .hero p {
                font-size: 15px;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .hero-stats .stat-item {
                display: flex;
                align-items: center;
                gap: 12px;
            }
            .hero-stats .stat-number {
                font-size: 22px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .stats-item .stat-number {
                font-size: 28px;
            }
            .section-header h2 {
                font-size: 22px;
            }
            .feature-card {
                padding: 28px 20px;
            }
            .news-card {
                padding: 20px;
            }
            .faq-item summary {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-item .answer {
                padding: 0 18px 16px;
                font-size: 14px;
            }
            .cta-section {
                padding: 56px 0;
            }
            .cta-section h2 {
                font-size: 22px;
            }
            .site-footer {
                padding: 32px 0 24px;
            }
            .sidebar {
                width: 260px;
            }
        }

        /* ===== 辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 32px;
        }
        .mb-8 {
            margin-bottom: 32px;
        }
        .gap-4 {
            gap: 16px;
        }
        .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;
        }

        /* ===== 滚动条美化 ===== */
        .sidebar::-webkit-scrollbar {
            width: 4px;
        }
        .sidebar::-webkit-scrollbar-track {
            background: transparent;
        }
        .sidebar::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 4px;
        }
        .sidebar::-webkit-scrollbar-thumb:hover {
            background: var(--text-light);
        }

/* roulang page: article */
:root {
  --primary: #1a3c6e;
  --primary-light: #2a5a9a;
  --primary-dark: #0f2440;
  --accent: #f59e0b;
  --accent-light: #fbbf24;
  --accent-dark: #d97706;
  --bg-body: #f8fafc;
  --bg-card: #ffffff;
  --bg-sidebar: #0f1724;
  --bg-sidebar-hover: #1e2a3a;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-light: #94a3b8;
  --text-white: #f1f5f9;
  --border: #e2e8f0;
  --shadow-sm: 0 1px 3px 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);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --sidebar-width: 220px;
  --header-h: 64px;
  --max-w: 1200px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --transition: all 0.25s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  display: flex;
  min-height: 100vh;
}
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
button, input, textarea { font-family: inherit; font-size: 1rem; outline: none; }
ul, ol { list-style: none; }

/* Sidebar */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-sidebar);
  color: var(--text-white);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 2px 0 20px rgba(0,0,0,0.2);
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 22px 20px 18px;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-brand i { color: var(--accent); font-size: 1.4rem; }
.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 16px 12px;
  gap: 4px;
}
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.7);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}
.sidebar-nav a i { width: 20px; text-align: center; font-size: 1.05rem; color: rgba(255,255,255,0.5); transition: var(--transition); }
.sidebar-nav a:hover { background: var(--bg-sidebar-hover); color: #fff; }
.sidebar-nav a:hover i { color: var(--accent); }
.sidebar-nav a.active { background: rgba(245,158,11,0.15); color: var(--accent); }
.sidebar-nav a.active i { color: var(--accent); }
.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 0.75rem;
  color: rgba(255,255,255,0.35);
  text-align: center;
}

/* Main wrapper */
.main-wrapper {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Mobile Top Bar */
.mobile-top {
  display: none;
  position: sticky;
  top: 0;
  z-index: 999;
  background: var(--bg-sidebar);
  color: #fff;
  padding: 0 16px;
  height: var(--header-h);
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}
.mobile-top .brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.05rem;
  color: #fff;
}
.mobile-top .brand i { color: var(--accent); }
.menu-toggle {
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.menu-toggle:hover { background: rgba(255,255,255,0.1); }

/* Overlay */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.sidebar-overlay.show { opacity: 1; pointer-events: auto; }
.sidebar-overlay:not(.show) { pointer-events: none; }

/* Container */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* Article Hero Banner */
.article-hero {
  position: relative;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
  padding: 60px 0 50px;
  color: #fff;
  overflow: hidden;
}
.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.12;
  mix-blend-mode: overlay;
}
.article-hero .container { position: relative; z-index: 1; }
.article-hero .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.article-hero .breadcrumb a { color: rgba(255,255,255,0.7); }
.article-hero .breadcrumb a:hover { color: var(--accent); }
.article-hero .breadcrumb .sep { color: rgba(255,255,255,0.3); }
.article-hero .breadcrumb .current { color: var(--accent); }
.article-hero h1 {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  max-width: 900px;
  letter-spacing: -0.3px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 24px;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.7);
  align-items: center;
}
.article-meta .tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(245,158,11,0.2);
  color: var(--accent-light);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}
.article-meta .date i { margin-right: 4px; }

/* Article Main */
.article-main {
  flex: 1;
  padding: 48px 0 60px;
}
.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  align-items: start;
}

/* Article Content */
.article-content {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 40px;
  border: 1px solid var(--border);
}
.article-not-found {
  text-align: center;
  padding: 60px 20px;
}
.article-not-found i { font-size: 3rem; color: var(--text-light); margin-bottom: 20px; }
.article-not-found h2 { font-size: 1.5rem; margin-bottom: 12px; color: var(--text-primary); }
.article-not-found p { color: var(--text-secondary); margin-bottom: 24px; }
.article-not-found .btn-back { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; background: var(--primary); color: #fff; border-radius: var(--radius-sm); font-weight: 600; transition: var(--transition); }
.article-not-found .btn-back:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: var(--shadow-md); }

.article-body {
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--text-primary);
}
.article-body h2 { font-size: 1.6rem; font-weight: 700; margin: 36px 0 16px; color: var(--primary); }
.article-body h3 { font-size: 1.25rem; font-weight: 700; margin: 28px 0 12px; color: var(--text-primary); }
.article-body p { margin-bottom: 18px; color: var(--text-secondary); }
.article-body ul, .article-body ol { margin: 16px 0 20px; padding-left: 24px; }
.article-body ul li { list-style: disc; margin-bottom: 8px; color: var(--text-secondary); }
.article-body ol li { list-style: decimal; margin-bottom: 8px; color: var(--text-secondary); }
.article-body a { color: var(--accent-dark); font-weight: 500; text-decoration: underline; }
.article-body a:hover { color: var(--accent); }
.article-body blockquote {
  border-left: 4px solid var(--accent);
  background: rgba(245,158,11,0.06);
  padding: 16px 24px;
  margin: 24px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
  font-style: italic;
}
.article-body img { margin: 24px 0; border-radius: var(--radius-md); box-shadow: var(--shadow-sm); width: 100%; }
.article-body pre, .article-body code { font-family: 'SF Mono', 'Fira Code', monospace; font-size: 0.9rem; }
.article-body pre {
  background: #1e293b;
  color: #e2e8f0;
  padding: 20px 24px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 24px 0;
  line-height: 1.6;
}
.article-body code:not(pre code) {
  background: #f1f5f9;
  padding: 2px 8px;
  border-radius: 4px;
  color: var(--primary);
  font-size: 0.9em;
}

/* Article Sidebar */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.sidebar-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  padding: 24px;
}
.sidebar-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar-card h3 i { color: var(--accent); }
.sidebar-card .related-list { display: flex; flex-direction: column; gap: 12px; }
.sidebar-card .related-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.sidebar-card .related-item:last-child { border-bottom: none; padding-bottom: 0; }
.sidebar-card .related-item img {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
}
.sidebar-card .related-info { flex: 1; min-width: 0; }
.sidebar-card .related-info a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.4;
  transition: var(--transition);
}
.sidebar-card .related-info a:hover { color: var(--accent); }
.sidebar-card .related-info .date { font-size: 0.75rem; color: var(--text-light); margin-top: 4px; display: block; }
.sidebar-card .cat-list { display: flex; flex-wrap: wrap; gap: 8px; }
.sidebar-card .cat-list a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-body);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.sidebar-card .cat-list a:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* CTA */
.article-cta {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  padding: 48px 0;
  text-align: center;
  color: #fff;
}
.article-cta h2 { font-size: 1.8rem; font-weight: 800; margin-bottom: 12px; }
.article-cta p { font-size: 1.05rem; color: rgba(255,255,255,0.8); max-width: 600px; margin: 0 auto 24px; }
.article-cta .btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 36px;
  background: var(--accent);
  color: #1e293b;
  font-weight: 700;
  font-size: 1rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  border: none;
  cursor: pointer;
}
.article-cta .btn-cta:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(245,158,11,0.35); }

/* Footer */
.site-footer {
  background: var(--bg-sidebar);
  color: rgba(255,255,255,0.7);
  padding: 48px 0 24px;
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}
.footer-brand .brand-text {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}
.footer-brand .brand-text i { color: var(--accent); }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 360px; }
.footer-col h4 { color: #fff; font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
.footer-col a { display: block; color: rgba(255,255,255,0.5); font-size: 0.9rem; padding: 4px 0; transition: var(--transition); }
.footer-col a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom a { color: rgba(255,255,255,0.4); }
.footer-bottom a:hover { color: var(--accent); }

/* Responsive */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .article-hero h1 { font-size: 1.8rem; }
}
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .mobile-top { display: flex; }
  .main-wrapper { margin-left: 0; }
  .sidebar-overlay.show { display: block; }
  .article-hero { padding: 32px 0 28px; }
  .article-hero h1 { font-size: 1.4rem; }
  .article-content { padding: 24px 20px; }
  .article-sidebar { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .article-cta h2 { font-size: 1.3rem; }
  .article-body { font-size: 0.98rem; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .article-hero h1 { font-size: 1.2rem; }
  .article-meta { flex-direction: column; gap: 8px; }
  .article-content { padding: 16px; }
  .article-body h2 { font-size: 1.25rem; }
  .article-body h3 { font-size: 1.1rem; }
  .sidebar-card .related-item img { width: 48px; height: 48px; }
  .article-cta .btn-cta { width: 100%; justify-content: center; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2D3A8C;
            --primary-light: #4A6CF7;
            --primary-dark: #1A2560;
            --primary-soft: #E8EDFF;
            --secondary: #6C63FF;
            --accent: #FF6B6B;
            --success: #2ED573;
            --warning: #FFA502;
            --bg: #F4F6FC;
            --bg-card: #FFFFFF;
            --bg-sidebar: linear-gradient(135deg, #1A2560 0%, #2D3A8C 100%);
            --text: #1E293B;
            --text-light: #64748B;
            --text-white: #FFFFFF;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10);
            --shadow-hover: 0 12px 32px rgba(74, 108, 247, 0.18);
            --transition: all 0.30s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 220px;
            --header-height: 0px;
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            display: flex;
            min-height: 100vh;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: 1rem;
            border: none;
            outline: none;
            transition: var(--transition);
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }

        /* ===== 布局容器 ===== */
        .app-wrapper {
            display: flex;
            width: 100%;
            min-height: 100vh;
        }
        .sidebar {
            width: var(--sidebar-width);
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            background: var(--bg-sidebar);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            padding: 24px 0 20px 0;
            box-shadow: 4px 0 24px rgba(0, 0, 0, 0.08);
            transition: var(--transition);
        }
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        /* ===== 侧边栏 Logo ===== */
        .sidebar-logo {
            padding: 0 20px 28px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.10);
            margin-bottom: 16px;
        }
        .sidebar-logo .brand-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 0.3px;
        }
        .sidebar-logo .brand-text i {
            color: #FFD700;
            font-size: 1.3em;
        }
        .sidebar-logo .brand-sub {
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 4px;
            padding-left: 34px;
            letter-spacing: 1px;
        }

        /* ===== 侧边栏导航 ===== */
        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            padding: 0 12px;
            flex: 1;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.70);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            position: relative;
        }
        .sidebar-nav a i {
            width: 22px;
            text-align: center;
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.60);
            transition: var(--transition);
        }
        .sidebar-nav a:hover {
            background: rgba(255, 255, 255, 0.10);
            color: var(--text-white);
        }
        .sidebar-nav a:hover i {
            color: var(--text-white);
        }
        .sidebar-nav a.active {
            background: rgba(255, 255, 255, 0.16);
            color: var(--text-white);
            font-weight: 600;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.12);
        }
        .sidebar-nav a.active i {
            color: #FFD700;
        }
        .sidebar-nav a.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 24px;
            background: #FFD700;
            border-radius: 0 4px 4px 0;
        }
        .sidebar-nav .nav-label {
            white-space: nowrap;
        }

        /* ===== 侧边栏底部 ===== */
        .sidebar-footer {
            padding: 16px 20px 0 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: auto;
        }
        .sidebar-footer .user-info {
            display: flex;
            align-items: center;
            gap: 12px;
            color: rgba(255, 255, 255, 0.60);
            font-size: 0.80rem;
        }
        .sidebar-footer .user-info i {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.40);
        }

        /* ===== 移动端顶部栏 ===== */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--bg-sidebar);
            z-index: 999;
            padding: 0 16px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
        }
        .mobile-topbar .brand-text {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-topbar .brand-text i {
            color: #FFD700;
        }
        .mobile-topbar .menu-toggle {
            color: var(--text-white);
            font-size: 1.5rem;
            padding: 6px 10px;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.10);
        }
        .mobile-topbar .menu-toggle:active {
            background: rgba(255, 255, 255, 0.20);
        }

        /* ===== 移动端抽屉遮罩 ===== */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.45);
            z-index: 998;
            opacity: 0;
            transition: opacity 0.30s ease;
            pointer-events: none;
        }
        .sidebar-overlay.show {
            opacity: 1;
            pointer-events: auto;
        }

        /* ===== 主内容区 ===== */
        .main-content {
            display: flex;
            flex-direction: column;
        }

        /* ===== 通用容器 ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* ===== 板块间距 ===== */
        .section {
            padding: 72px 0;
        }
        .section+.section {
            border-top: 1px solid var(--border);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 2rem;
            color: var(--primary-dark);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-header .badge {
            display: inline-block;
            background: var(--primary-soft);
            color: var(--primary);
            padding: 4px 18px;
            border-radius: 40px;
            font-size: 0.80rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        /* ===== Hero / Banner ===== */
        .category-banner {
            position: relative;
            padding: 80px 0 72px 0;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: var(--text-white);
            overflow: hidden;
        }
        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 37, 96, 0.88) 0%, rgba(45, 58, 140, 0.72) 100%);
            z-index: 1;
        }
        .category-banner .container {
            position: relative;
            z-index: 2;
        }
        .category-banner .banner-bread {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .category-banner .banner-bread a {
            color: rgba(255, 255, 255, 0.75);
        }
        .category-banner .banner-bread a:hover {
            color: var(--text-white);
        }
        .category-banner .banner-bread .sep {
            color: rgba(255, 255, 255, 0.35);
        }
        .category-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            line-height: 1.2;
        }
        .category-banner h1 i {
            color: #FFD700;
            margin-right: 12px;
        }
        .category-banner p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 620px;
            line-height: 1.8;
            margin-bottom: 28px;
        }
        .category-banner .banner-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
            margin-top: 8px;
        }
        .category-banner .banner-stats .stat-item {
            display: flex;
            flex-direction: column;
        }
        .category-banner .banner-stats .stat-num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.2;
        }
        .category-banner .banner-stats .stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.65);
        }

        /* ===== 卡片通用 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 28px 24px;
            transition: var(--transition);
            border: 1px solid rgba(0, 0, 0, 0.03);
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .card .card-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin-bottom: 16px;
            color: var(--text-white);
        }
        .card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--primary-dark);
        }
        .card p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.7;
        }
        .card .card-tag {
            display: inline-block;
            background: var(--primary-soft);
            color: var(--primary);
            padding: 2px 14px;
            border-radius: 30px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-top: 12px;
        }

        /* ===== 验证方式卡片网格 ===== */
        .verify-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .verify-grid .card {
            text-align: center;
            padding: 32px 20px 28px 20px;
        }
        .verify-grid .card .card-icon {
            margin: 0 auto 16px auto;
        }
        .icon-blue {
            background: linear-gradient(135deg, #4A6CF7, #2D3A8C);
        }
        .icon-green {
            background: linear-gradient(135deg, #2ED573, #1E8E3E);
        }
        .icon-purple {
            background: linear-gradient(135deg, #6C63FF, #4A3FCF);
        }
        .icon-orange {
            background: linear-gradient(135deg, #FFA502, #E67E22);
        }
        .icon-cyan {
            background: linear-gradient(135deg, #00CEC9, #0984E3);
        }

        /* ===== 流程步骤 ===== */
        .steps {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            justify-content: center;
            counter-reset: step;
        }
        .step-item {
            flex: 1 1 180px;
            max-width: 220px;
            text-align: center;
            position: relative;
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 16px 24px 16px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(0, 0, 0, 0.02);
            transition: var(--transition);
        }
        .step-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .step-item .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            margin: 0 auto 14px auto;
            box-shadow: 0 4px 12px rgba(45, 58, 140, 0.25);
        }
        .step-item h4 {
            font-size: 1rem;
            margin-bottom: 6px;
            color: var(--primary-dark);
        }
        .step-item p {
            font-size: 0.85rem;
            color: var(--text-light);
            line-height: 1.6;
        }
        .step-item .step-icon {
            font-size: 2rem;
            color: var(--primary-light);
            margin-bottom: 12px;
        }

        /* ===== 安全数据 ===== */
        .data-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 24px;
            text-align: center;
        }
        .data-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 16px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(0, 0, 0, 0.02);
        }
        .data-item .data-num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .data-item .data-num span {
            font-size: 1.4rem;
            font-weight: 600;
            color: var(--primary-light);
        }
        .data-item .data-label {
            font-size: 0.95rem;
            color: var(--text-light);
            margin-top: 6px;
        }
        .data-item .data-icon {
            font-size: 2rem;
            color: var(--primary-light);
            margin-bottom: 12px;
            opacity: 0.6;
        }

        /* ===== 图文区块 ===== */
        .media-block {
            display: flex;
            align-items: center;
            gap: 48px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(0, 0, 0, 0.02);
        }
        .media-block.reverse {
            flex-direction: row-reverse;
        }
        .media-block .media-text {
            flex: 1 1 50%;
        }
        .media-block .media-text h3 {
            font-size: 1.5rem;
            color: var(--primary-dark);
            margin-bottom: 12px;
        }
        .media-block .media-text p {
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .media-block .media-text .feature-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .media-block .media-text .feature-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.92rem;
            color: var(--text);
        }
        .media-block .media-text .feature-list li i {
            color: var(--success);
            font-size: 1rem;
        }
        .media-block .media-image {
            flex: 1 1 50%;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }
        .media-block .media-image img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
            border-radius: var(--radius);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow);
            border: 1px solid rgba(0, 0, 0, 0.03);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item summary {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 12px;
            list-style: none;
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary i {
            color: var(--primary-light);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .faq-item summary .arrow {
            margin-left: auto;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .faq-item[open] summary .arrow {
            transform: rotate(180deg);
        }
        .faq-item[open] summary {
            background: var(--primary-soft);
        }
        .faq-item .faq-answer {
            padding: 4px 24px 20px 24px;
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.8;
            border-top: 1px solid var(--border);
            margin-top: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
            padding: 72px 0;
            text-align: center;
            color: var(--text-white);
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(26, 37, 96, 0.82);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2rem;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.80);
            max-width: 540px;
            margin: 0 auto 28px auto;
        }
        .cta-section .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 60px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: 2px solid transparent;
            cursor: pointer;
            letter-spacing: 0.3px;
        }
        .btn-primary {
            background: var(--text-white);
            color: var(--primary-dark);
            border-color: var(--text-white);
        }
        .btn-primary:hover {
            background: rgba(255, 255, 255, 0.90);
            box-shadow: 0 8px 28px rgba(255, 255, 255, 0.25);
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255, 255, 255, 0.45);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--text-white);
        }
        .btn-outline:active {
            background: rgba(255, 255, 255, 0.20);
        }
        .btn-ghost {
            background: var(--primary-soft);
            color: var(--primary);
        }
        .btn-ghost:hover {
            background: #D6DFFF;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }

        /* ===== 标签/徽章 ===== */
        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 30px;
            font-size: 0.75rem;
            font-weight: 600;
            background: var(--primary-soft);
            color: var(--primary);
        }
        .tag-success {
            background: #E6F9EE;
            color: #1E8E3E;
        }
        .tag-warning {
            background: #FFF3E0;
            color: #E67E22;
        }
        .tag-new {
            background: #FEE2E2;
            color: #DC2626;
        }

        /* ===== 分隔线 ===== */
        .divider {
            width: 60px;
            height: 4px;
            border-radius: 4px;
            background: var(--primary-light);
            margin: 16px auto 24px auto;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.80);
            padding: 56px 0 28px 0;
            margin-top: auto;
        }
        .site-footer .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .site-footer .footer-brand .brand-text {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }
        .site-footer .footer-brand .brand-text i {
            color: #FFD700;
        }
        .site-footer .footer-brand p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.60);
            line-height: 1.8;
            max-width: 360px;
        }
        .site-footer .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .site-footer .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.60);
            padding: 4px 0;
            transition: var(--transition);
        }
        .site-footer .footer-col a:hover {
            color: var(--text-white);
            padding-left: 4px;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.10);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.45);
        }
        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--text-white);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .media-block {
                flex-direction: column;
                padding: 28px 20px;
            }
            .media-block.reverse {
                flex-direction: column;
            }
            .media-block .media-text,
            .media-block .media-image {
                flex: 1 1 100%;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
            }
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
                z-index: 1000;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .mobile-topbar {
                display: flex;
            }
            .sidebar-overlay {
                display: block;
            }
            .main-content {
                margin-left: 0;
                padding-top: 60px;
            }
            .category-banner {
                padding: 52px 0 48px 0;
            }
            .category-banner h1 {
                font-size: 1.9rem;
            }
            .category-banner p {
                font-size: 1rem;
            }
            .category-banner .banner-stats {
                gap: 20px;
            }
            .category-banner .banner-stats .stat-num {
                font-size: 1.4rem;
            }
            .section {
                padding: 48px 0;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .section-header p {
                font-size: 0.95rem;
            }
            .verify-grid {
                grid-template-columns: 1fr 1fr;
            }
            .data-grid {
                grid-template-columns: 1fr 1fr;
            }
            .steps {
                gap: 16px;
            }
            .step-item {
                flex: 1 1 140px;
                max-width: 180px;
                padding: 24px 12px 20px 12px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section .btn-group .btn {
                padding: 12px 24px;
                font-size: 0.92rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .category-banner h1 {
                font-size: 1.5rem;
            }
            .category-banner p {
                font-size: 0.92rem;
            }
            .category-banner .banner-stats {
                flex-direction: column;
                gap: 12px;
            }
            .verify-grid {
                grid-template-columns: 1fr;
            }
            .data-grid {
                grid-template-columns: 1fr;
            }
            .steps {
                flex-direction: column;
                align-items: center;
            }
            .step-item {
                max-width: 100%;
                width: 100%;
            }
            .media-block {
                padding: 20px 16px;
            }
            .media-block .media-text h3 {
                font-size: 1.2rem;
            }
            .faq-item summary {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-item .faq-answer {
                padding: 2px 16px 16px 16px;
                font-size: 0.88rem;
            }
            .section {
                padding: 36px 0;
            }
            .section-header {
                margin-bottom: 28px;
            }
            .section-header h2 {
                font-size: 1.3rem;
            }
            .btn {
                padding: 10px 22px;
                font-size: 0.90rem;
            }
            .site-footer {
                padding: 36px 0 20px 0;
            }
            .cta-section {
                padding: 48px 0;
            }
            .cta-section h2 {
                font-size: 1.3rem;
            }
            .cta-section .btn-group {
                flex-direction: column;
                align-items: center;
            }
        }

        /* ===== 可访问性 ===== */
        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
            border-radius: 6px;
        }
        .sidebar-nav a:focus-visible {
            outline-color: #FFD700;
        }

        /* ===== 滚动条美化 ===== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: transparent;
        }
        ::-webkit-scrollbar-thumb {
            background: rgba(45, 58, 140, 0.30);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: rgba(45, 58, 140, 0.50);
        }