/* roulang page: index */
/* ===== :root 设计变量 ===== */
        :root {
            --primary: #1a56db;
            --primary-dark: #1342a8;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --secondary: #f97316;
            --secondary-dark: #ea580c;
            --secondary-light: #fb923c;
            --accent: #8b5cf6;
            --accent-light: #a78bfa;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --bg-gray: #f1f5f9;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
            --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
            --shadow-xl: 0 24px 60px rgba(15, 23, 42, 0.16);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 250px;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
        }

        /* ===== Reset / Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-sans);
            color: var(--text-primary);
            background: var(--bg-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea, select { font-family: inherit; }
        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: 2.75rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.375rem; }
        h4 { font-size: 1.125rem; }
        p { margin-bottom: 0.75rem; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .container-wide { max-width: 1360px; margin: 0 auto; padding: 0 24px; }

        /* ===== 左侧竖向导航 - 桌面端 ===== */
        .site-wrapper { display: flex; min-height: 100vh; }
        .sidebar-nav {
            position: fixed; top: 0; left: 0; width: var(--sidebar-width); height: 100vh;
            background: var(--bg-dark); color: var(--text-white); z-index: 1000;
            display: flex; flex-direction: column; padding: 0; overflow-y: auto;
            border-right: 1px solid rgba(255,255,255,0.06);
            transition: var(--transition);
        }
        .sidebar-nav .logo-area {
            padding: 32px 24px 24px; border-bottom: 1px solid rgba(255,255,255,0.08);
            display: flex; align-items: center; gap: 14px;
        }
        .sidebar-nav .logo-icon {
            width: 42px; height: 42px; border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            display: flex; align-items: center; justify-content: center;
            font-size: 20px; font-weight: 800; color: #fff; flex-shrink: 0;
        }
        .sidebar-nav .logo-text {
            font-size: 1.1rem; font-weight: 700; letter-spacing: 0.5px;
            background: linear-gradient(90deg, #fff, #c7d2fe);
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .sidebar-nav .nav-menu { flex: 1; padding: 20px 16px; }
        .sidebar-nav .nav-menu li { margin-bottom: 4px; }
        .sidebar-nav .nav-menu a {
            display: flex; align-items: center; gap: 14px;
            padding: 12px 18px; border-radius: var(--radius-sm);
            color: rgba(255,255,255,0.7); font-size: 0.95rem; font-weight: 500;
            transition: var(--transition); position: relative;
        }
        .sidebar-nav .nav-menu a i { width: 20px; text-align: center; font-size: 1.05rem; }
        .sidebar-nav .nav-menu a:hover { background: rgba(255,255,255,0.08); color: #fff; }
        .sidebar-nav .nav-menu a.active {
            background: rgba(59,130,246,0.2); color: var(--primary-light); font-weight: 600;
        }
        .sidebar-nav .nav-menu a.active::before {
            content: ''; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
            width: 3px; height: 24px; background: var(--primary-light); border-radius: 0 3px 3px 0;
        }
        .sidebar-nav .nav-footer {
            padding: 20px 24px; border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 0.8rem; color: rgba(255,255,255,0.35);
        }

        /* ===== 主内容区 ===== */
        .main-content {
            flex: 1; margin-left: var(--sidebar-width); min-height: 100vh;
            background: var(--bg-body);
        }

        /* ===== 移动端顶部导航 ===== */
        .top-bar-mobile {
            display: none; position: sticky; top: 0; z-index: 999;
            background: var(--bg-dark); padding: 12px 20px;
            align-items: center; justify-content: space-between;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .top-bar-mobile .logo-text {
            font-size: 1rem; font-weight: 700; color: #fff;
            background: linear-gradient(90deg, #fff, #c7d2fe);
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .top-bar-mobile .hamburger {
            background: none; border: none; color: #fff; font-size: 1.5rem;
            cursor: pointer; padding: 4px 8px; border-radius: 6px;
        }
        .top-bar-mobile .hamburger:hover { background: rgba(255,255,255,0.1); }
        .mobile-menu-dropdown {
            display: none; background: var(--bg-dark); border-bottom: 1px solid rgba(255,255,255,0.06);
            padding: 8px 20px 16px;
        }
        .mobile-menu-dropdown.open { display: block; }
        .mobile-menu-dropdown a {
            display: flex; align-items: center; gap: 12px;
            padding: 10px 14px; border-radius: var(--radius-sm);
            color: rgba(255,255,255,0.7); font-size: 0.95rem; font-weight: 500;
            transition: var(--transition);
        }
        .mobile-menu-dropdown a:hover { background: rgba(255,255,255,0.08); color: #fff; }
        .mobile-menu-dropdown a.active { color: var(--primary-light); font-weight: 600; }
        .mobile-menu-dropdown a i { width: 20px; text-align: center; }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative; min-height: 75vh; display: flex; align-items: center;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
            overflow: hidden; padding: 60px 0;
        }
        .hero::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.2; z-index: 0;
        }
        .hero-bg-overlay {
            position: absolute; inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(26,86,219,0.25) 0%, transparent 60%),
                        radial-gradient(ellipse at 70% 50%, rgba(249,115,22,0.15) 0%, transparent 60%);
            z-index: 1;
        }
        .hero .container-wide { position: relative; z-index: 2; width: 100%; }
        .hero-content { max-width: 680px; }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 8px;
            background: rgba(59,130,246,0.2); border: 1px solid rgba(59,130,246,0.3);
            padding: 6px 18px; border-radius: 50px; font-size: 0.85rem; color: #93c5fd;
            margin-bottom: 24px; backdrop-filter: blur(4px);
        }
        .hero-badge i { font-size: 0.75rem; }
        .hero h1 {
            font-size: 3.25rem; font-weight: 800; color: #fff; line-height: 1.2;
            margin-bottom: 20px; letter-spacing: -0.5px;
        }
        .hero h1 span { 
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.15rem; color: rgba(255,255,255,0.7); line-height: 1.8;
            margin-bottom: 36px; max-width: 560px;
        }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-actions .btn-primary {
            display: inline-flex; align-items: center; gap: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff; padding: 14px 36px; border-radius: 50px; font-weight: 600;
            font-size: 1rem; border: none; cursor: pointer; transition: var(--transition);
            box-shadow: 0 4px 20px rgba(26,86,219,0.4);
        }
        .hero-actions .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(26,86,219,0.5); }
        .hero-actions .btn-secondary {
            display: inline-flex; align-items: center; gap: 10px;
            background: rgba(255,255,255,0.08); backdrop-filter: blur(8px);
            color: #fff; padding: 14px 36px; border-radius: 50px; font-weight: 500;
            font-size: 1rem; border: 1px solid rgba(255,255,255,0.15); cursor: pointer;
            transition: var(--transition);
        }
        .hero-actions .btn-secondary:hover { background: rgba(255,255,255,0.15); border-color: rgba(255,255,255,0.3); }
        .hero-stats {
            display: flex; gap: 40px; margin-top: 56px; flex-wrap: wrap;
        }
        .hero-stats .stat-item { text-align: left; }
        .hero-stats .stat-number {
            font-size: 2rem; font-weight: 800; color: #fff; line-height: 1.2;
        }
        .hero-stats .stat-label { font-size: 0.9rem; color: rgba(255,255,255,0.5); margin-top: 4px; }

        /* ===== 通用板块样式 ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-gray); }
        .section-dark { background: var(--bg-dark); color: var(--text-white); }
        .section-title { text-align: center; margin-bottom: 56px; }
        .section-title h2 { font-size: 2.2rem; font-weight: 800; margin-bottom: 12px; }
        .section-title p { font-size: 1.05rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }
        .section-title.light h2 { color: #fff; }
        .section-title.light p { color: rgba(255,255,255,0.6); }
        .section-divider { width: 60px; height: 4px; border-radius: 4px; margin: 16px auto 0; background: linear-gradient(90deg, var(--primary), var(--secondary)); }
        .text-center { text-align: center; }

        /* ===== 卡片网格 ===== */
        .card-grid { display: grid; gap: 28px; }
        .card-grid-2 { grid-template-columns: repeat(2, 1fr); }
        .card-grid-3 { grid-template-columns: repeat(3, 1fr); }
        .card-grid-4 { grid-template-columns: repeat(4, 1fr); }
        .card {
            background: var(--bg-card); border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm); overflow: hidden;
            transition: var(--transition); border: 1px solid var(--border);
        }
        .card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
        .card-image { width: 100%; height: 200px; object-fit: cover; background: var(--bg-gray); }
        .card-body { padding: 24px; }
        .card-body h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
        .card-body p { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 12px; }
        .card-footer { padding: 16px 24px; border-top: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; }
        .card-tag {
            display: inline-block; padding: 2px 14px; border-radius: 50px;
            font-size: 0.75rem; font-weight: 600; background: var(--primary-bg); color: var(--primary);
        }
        .card-tag.orange { background: #fff7ed; color: var(--secondary); }
        .card-tag.purple { background: #f5f3ff; color: var(--accent); }

        /* ===== 特色介绍板块 ===== */
        .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .feature-item { text-align: center; padding: 32px 20px; border-radius: var(--radius-md); background: var(--bg-card); border: 1px solid var(--border); transition: var(--transition); }
        .feature-item:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .feature-icon {
            width: 64px; height: 64px; border-radius: var(--radius-sm); margin: 0 auto 18px;
            display: flex; align-items: center; justify-content: center;
            font-size: 1.6rem; color: #fff;
        }
        .feature-icon.blue { background: linear-gradient(135deg, var(--primary), var(--primary-light)); }
        .feature-icon.orange { background: linear-gradient(135deg, var(--secondary), var(--secondary-light)); }
        .feature-icon.purple { background: linear-gradient(135deg, var(--accent), var(--accent-light)); }
        .feature-item h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
        .feature-item p { font-size: 0.92rem; color: var(--text-secondary); margin: 0; }

        /* ===== 分类入口 ===== */
        .category-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
        .category-card {
            position: relative; border-radius: var(--radius-md); overflow: hidden;
            height: 320px; display: flex; align-items: flex-end; cursor: pointer;
            transition: var(--transition); background: var(--bg-dark);
        }
        .category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl); }
        .category-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0.7; transition: var(--transition); }
        .category-card:hover img { transform: scale(1.05); opacity: 0.85; }
        .category-card .overlay {
            position: relative; z-index: 2; padding: 32px 28px; width: 100%;
            background: linear-gradient(0deg, rgba(15,23,42,0.85) 0%, transparent 100%);
        }
        .category-card .overlay h3 { color: #fff; font-size: 1.4rem; font-weight: 700; margin-bottom: 6px; }
        .category-card .overlay p { color: rgba(255,255,255,0.7); font-size: 0.92rem; margin: 0; }
        .category-card .overlay .btn-outline-light {
            margin-top: 14px; display: inline-flex; align-items: center; gap: 8px;
            color: #fff; border: 1px solid rgba(255,255,255,0.3); padding: 8px 22px;
            border-radius: 50px; font-size: 0.85rem; font-weight: 500; transition: var(--transition);
        }
        .category-card .overlay .btn-outline-light:hover { background: rgba(255,255,255,0.15); border-color: rgba(255,255,255,0.5); }

        /* ===== CMS 最新资讯列表 ===== */
        .latest-list { display: flex; flex-direction: column; gap: 16px; }
        .latest-item {
            display: flex; align-items: flex-start; gap: 20px;
            padding: 20px 24px; background: var(--bg-card); border-radius: var(--radius-sm);
            border: 1px solid var(--border); transition: var(--transition);
        }
        .latest-item:hover { box-shadow: var(--shadow-md); border-color: var(--primary-light); }
        .latest-item .item-index {
            width: 40px; height: 40px; border-radius: 50%; flex-shrink: 0;
            background: var(--primary-bg); color: var(--primary); font-weight: 700;
            display: flex; align-items: center; justify-content: center; font-size: 0.95rem;
        }
        .latest-item .item-content { flex: 1; }
        .latest-item .item-content h4 { font-size: 1.05rem; font-weight: 600; margin-bottom: 4px; }
        .latest-item .item-content h4 a { color: var(--text-primary); }
        .latest-item .item-content h4 a:hover { color: var(--primary); }
        .latest-item .item-content .meta { font-size: 0.82rem; color: var(--text-muted); display: flex; gap: 16px; flex-wrap: wrap; }
        .latest-item .item-content .meta span { display: inline-flex; align-items: center; gap: 4px; }
        .latest-item .item-content .excerpt { font-size: 0.9rem; color: var(--text-secondary); margin-top: 6px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .empty-state { text-align: center; padding: 60px 20px; color: var(--text-muted); background: var(--bg-card); border-radius: var(--radius-md); border: 1px dashed var(--border); }
        .empty-state i { font-size: 2.5rem; margin-bottom: 16px; display: block; }
        .empty-state p { font-size: 1rem; }

        /* ===== 数据统计 ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .stat-card {
            text-align: center; padding: 36px 20px; background: rgba(255,255,255,0.05);
            border-radius: var(--radius-md); border: 1px solid rgba(255,255,255,0.08);
            backdrop-filter: blur(8px); transition: var(--transition);
        }
        .stat-card:hover { background: rgba(255,255,255,0.08); transform: translateY(-4px); }
        .stat-card .icon { font-size: 2rem; color: var(--primary-light); margin-bottom: 12px; }
        .stat-card .number { font-size: 2.4rem; font-weight: 800; color: #fff; line-height: 1.2; }
        .stat-card .label { font-size: 0.9rem; color: rgba(255,255,255,0.5); margin-top: 4px; }

        /* ===== 服务流程 ===== */
        .process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
        .process-step { text-align: center; position: relative; }
        .process-step .step-number {
            width: 56px; height: 56px; border-radius: 50%; margin: 0 auto 16px;
            display: flex; align-items: center; justify-content: center;
            font-size: 1.3rem; font-weight: 800; color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            box-shadow: 0 4px 16px rgba(26,86,219,0.3); position: relative; z-index: 2;
        }
        .process-step .step-label { font-size: 1rem; font-weight: 600; margin-bottom: 4px; }
        .process-step .step-desc { font-size: 0.88rem; color: var(--text-secondary); }
        .process-connector { display: none; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; transition: var(--transition); }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-question {
            padding: 18px 24px; display: flex; align-items: center; justify-content: space-between;
            cursor: pointer; font-weight: 600; font-size: 1rem; transition: var(--transition);
            user-select: none;
        }
        .faq-question i { color: var(--text-muted); transition: var(--transition); font-size: 0.85rem; }
        .faq-question.open i { transform: rotate(180deg); color: var(--primary); }
        .faq-answer { padding: 0 24px 18px; font-size: 0.95rem; color: var(--text-secondary); line-height: 1.7; display: none; }
        .faq-answer.open { display: block; }

        /* ===== CTA 区域 ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            padding: 80px 0; text-align: center; 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; z-index: 0;
        }
        .cta-section .container-wide { position: relative; z-index: 1; }
        .cta-section h2 { color: #fff; font-size: 2.2rem; font-weight: 800; margin-bottom: 16px; }
        .cta-section p { color: rgba(255,255,255,0.7); font-size: 1.05rem; max-width: 560px; margin: 0 auto 32px; }
        .cta-section .btn-cta {
            display: inline-flex; align-items: center; gap: 10px;
            background: #fff; color: var(--primary-dark); padding: 16px 44px;
            border-radius: 50px; font-weight: 700; font-size: 1.05rem;
            transition: var(--transition); border: none; cursor: pointer;
            box-shadow: 0 4px 24px rgba(0,0,0,0.2);
        }
        .cta-section .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 36px rgba(0,0,0,0.3); background: #f8fafc; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark); color: rgba(255,255,255,0.6);
            padding: 56px 0 32px; border-top: 1px solid rgba(255,255,255,0.06);
        }
        .site-footer .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
        .site-footer .footer-brand .logo-text { font-size: 1.1rem; font-weight: 700; color: #fff; margin-bottom: 12px; display: block; }
        .site-footer .footer-brand p { font-size: 0.88rem; line-height: 1.7; max-width: 320px; }
        .site-footer h4 { color: #fff; font-size: 0.95rem; font-weight: 700; margin-bottom: 16px; }
        .site-footer ul li { margin-bottom: 8px; }
        .site-footer ul a { color: rgba(255,255,255,0.5); font-size: 0.88rem; transition: var(--transition); }
        .site-footer ul a:hover { color: var(--primary-light); }
        .site-footer .footer-bottom {
            margin-top: 40px; padding-top: 24px;
            border-top: 1px solid rgba(255,255,255,0.06);
            display: flex; align-items: center; justify-content: space-between;
            flex-wrap: wrap; gap: 16px; font-size: 0.82rem;
        }
        .site-footer .footer-bottom a { color: rgba(255,255,255,0.5); }
        .site-footer .footer-bottom a:hover { color: var(--primary-light); }
        .site-footer .social-links { display: flex; gap: 12px; }
        .site-footer .social-links a {
            width: 36px; height: 36px; border-radius: 50%;
            background: rgba(255,255,255,0.06); display: flex; align-items: center; justify-content: center;
            color: rgba(255,255,255,0.5); transition: var(--transition);
        }
        .site-footer .social-links a:hover { background: var(--primary); color: #fff; }

        /* ===== 回到顶部 ===== */
        .back-to-top {
            position: fixed; bottom: 32px; right: 32px; z-index: 999;
            width: 48px; height: 48px; border-radius: 50%;
            background: var(--primary); color: #fff; border: none; cursor: pointer;
            display: flex; align-items: center; justify-content: center;
            box-shadow: var(--shadow-lg); transition: var(--transition);
            opacity: 0; visibility: hidden; transform: translateY(20px);
        }
        .back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
        .back-to-top:hover { background: var(--primary-dark); transform: translateY(-4px); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .sidebar-nav { display: none; }
            .top-bar-mobile { display: flex; }
            .main-content { margin-left: 0; }
            .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .process-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 24px; }
            .site-footer .footer-grid { grid-template-columns: 1fr 1fr; }
            .hero h1 { font-size: 2.5rem; }
            .section-title h2 { font-size: 1.8rem; }
        }
        @media (max-width: 768px) {
            .hero { min-height: 60vh; padding: 40px 0; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .hero-actions .btn-primary, .hero-actions .btn-secondary { padding: 12px 28px; font-size: 0.92rem; }
            .hero-stats { gap: 24px; margin-top: 36px; }
            .hero-stats .stat-number { font-size: 1.5rem; }
            .card-grid-2, .card-grid-3, .card-grid-4 { grid-template-columns: 1fr; }
            .category-cards { grid-template-columns: 1fr; }
            .feature-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .process-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
            .section { padding: 56px 0; }
            .section-title { margin-bottom: 36px; }
            .section-title h2 { font-size: 1.6rem; }
            .site-footer .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .site-footer .footer-bottom { flex-direction: column; text-align: center; }
            .latest-item { flex-direction: column; gap: 12px; padding: 16px 18px; }
            .latest-item .item-index { width: 32px; height: 32px; font-size: 0.85rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.7rem; }
            .hero-stats { flex-direction: column; gap: 16px; }
            .hero-actions { flex-direction: column; }
            .hero-actions .btn-primary, .hero-actions .btn-secondary { justify-content: center; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .stat-card { padding: 24px 12px; }
            .stat-card .number { font-size: 1.6rem; }
            .process-grid { grid-template-columns: 1fr; }
            .cta-section h2 { font-size: 1.6rem; }
            .cta-section .btn-cta { padding: 14px 32px; font-size: 0.95rem; width: 100%; justify-content: center; }
            .back-to-top { bottom: 20px; right: 20px; width: 42px; height: 42px; }
        }

        /* ===== Foundation 覆盖 ===== */
        .button.primary { background: var(--primary); }
        .button.primary:hover { background: var(--primary-dark); }
        .button.secondary { background: var(--secondary); }
        .button.secondary:hover { background: var(--secondary-dark); }
        .callout { border-radius: var(--radius-sm); border: 1px solid var(--border); }
        .badge { border-radius: 50px; font-weight: 600; padding: 4px 14px; }

/* roulang page: article */
:root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2440;
            --secondary: #e8a838;
            --secondary-light: #f0c060;
            --accent: #d4872a;
            --bg-body: #f5f7fa;
            --bg-card: #ffffff;
            --bg-dark: #0f1a2b;
            --text-primary: #1a2a3a;
            --text-secondary: #4a5a6a;
            --text-light: #8a9aaa;
            --text-white: #f0f4f8;
            --border: #dce2ea;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(26, 58, 92, 0.08);
            --shadow-hover: 0 12px 40px rgba(26, 58, 92, 0.15);
            --shadow-sidebar: 4px 0 30px rgba(0, 0, 0, 0.06);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --sidebar-width: 240px;
            --header-h: 0px;
            --gap: 32px;
            --gap-sm: 20px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            display: flex;
            min-height: 100vh;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--primary);
            outline: none;
        }
        a:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        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;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 12px 0;
        }
        h1 {
            font-size: 2.2rem;
        }
        h2 {
            font-size: 1.6rem;
        }
        h3 {
            font-size: 1.25rem;
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin: 0 0 16px 0;
            color: var(--text-secondary);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--gap);
            width: 100%;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 var(--gap-sm);
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.3rem;
            }
        }

        /* ===== Sidebar Layout ===== */
        .app-wrapper {
            display: flex;
            width: 100%;
            min-height: 100vh;
        }
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-dark);
            color: var(--text-white);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            box-shadow: var(--shadow-sidebar);
            transition: transform var(--transition);
            overflow-y: auto;
        }
        .sidebar .logo-area {
            display: flex;
            align-items: center;
            padding: 28px 20px 20px 24px;
            gap: 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .sidebar .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--secondary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--primary-dark);
            flex-shrink: 0;
        }
        .sidebar .logo-text {
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .sidebar .nav-menu {
            flex: 1;
            padding: 16px 12px;
        }
        .sidebar .nav-menu li {
            margin-bottom: 4px;
        }
        .sidebar .nav-menu a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            text-decoration: none;
        }
        .sidebar .nav-menu a i {
            width: 20px;
            text-align: center;
            font-size: 1.05rem;
            flex-shrink: 0;
        }
        .sidebar .nav-menu a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .sidebar .nav-menu a.active {
            background: var(--primary-light);
            color: #fff;
            box-shadow: 0 4px 12px rgba(42, 90, 140, 0.3);
        }
        .sidebar .nav-footer {
            padding: 16px 24px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.4);
            text-align: center;
            letter-spacing: 0.3px;
        }
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        /* ===== Mobile Top Bar ===== */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--bg-dark);
            z-index: 999;
            padding: 0 16px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .mobile-topbar .logo-text {
            color: #fff;
            font-weight: 700;
            font-size: 1.05rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-topbar .logo-text i {
            color: var(--secondary);
        }
        .mobile-topbar .menu-toggle {
            color: #fff;
            font-size: 1.4rem;
            padding: 8px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition);
            pointer-events: none;
        }
        .sidebar-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }

        @media (max-width: 900px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .main-content {
                margin-left: 0;
                padding-top: 60px;
            }
            .mobile-topbar {
                display: flex;
            }
            .sidebar-overlay {
                display: block;
            }
        }

        /* ===== Article Banner ===== */
        .article-banner {
            position: relative;
            padding: 80px 0 60px;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: #fff;
            margin-top: 0;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 26, 43, 0.88) 0%, rgba(26, 58, 92, 0.75) 100%);
            z-index: 1;
        }
        .article-banner .container {
            position: relative;
            z-index: 2;
        }
        .article-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .article-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            transition: color var(--transition);
        }
        .article-banner .breadcrumb a:hover {
            color: var(--secondary);
        }
        .article-banner .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.3);
        }
        .article-banner .breadcrumb .current {
            color: var(--secondary);
            font-weight: 500;
        }
        .article-banner h1 {
            font-size: 2.4rem;
            color: #fff;
            margin-bottom: 16px;
            max-width: 840px;
            line-height: 1.25;
        }
        .article-banner .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
        }
        .article-banner .meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-banner .meta i {
            color: var(--secondary);
        }
        .article-banner .meta .category-tag {
            background: var(--secondary);
            color: var(--primary-dark);
            padding: 4px 14px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.8rem;
            display: inline-block;
        }
        @media (max-width: 768px) {
            .article-banner {
                padding: 48px 0 36px;
            }
            .article-banner h1 {
                font-size: 1.5rem;
            }
            .article-banner .meta {
                gap: 12px;
                font-size: 0.8rem;
            }
        }

        /* ===== Article Content ===== */
        .article-section {
            padding: 48px 0 64px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px 44px;
            overflow: hidden;
        }
        .article-body .featured-image {
            margin: -40px -44px 32px -44px;
            border-radius: var(--radius) var(--radius) 0 0;
            overflow: hidden;
            max-height: 420px;
            object-fit: cover;
            width: calc(100% + 88px);
        }
        .article-body .featured-image img {
            border-radius: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .article-body .content-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-primary);
        }
        .article-body .content-body p {
            margin-bottom: 20px;
            color: var(--text-secondary);
        }
        .article-body .content-body h2,
        .article-body .content-body h3 {
            margin-top: 32px;
            margin-bottom: 16px;
        }
        .article-body .content-body img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow);
        }
        .article-body .content-body ul,
        .article-body .content-body ol {
            margin: 0 0 20px 24px;
            color: var(--text-secondary);
        }
        .article-body .content-body ul {
            list-style: disc;
        }
        .article-body .content-body ol {
            list-style: decimal;
        }
        .article-body .content-body li {
            margin-bottom: 8px;
        }
        .article-body .content-body blockquote {
            border-left: 4px solid var(--secondary);
            padding: 16px 24px;
            margin: 24px 0;
            background: rgba(232, 168, 56, 0.06);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body .content-body a {
            color: var(--primary-light);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body .content-body a:hover {
            color: var(--primary);
        }
        .article-body .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }
        .article-body .article-tags .tag {
            background: var(--bg-body);
            color: var(--text-secondary);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .article-body .article-tags .tag:hover {
            background: var(--primary-light);
            color: #fff;
            border-color: var(--primary-light);
        }
        .article-body .article-nav {
            display: flex;
            justify-content: space-between;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            gap: 20px;
        }
        .article-body .article-nav a {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 500;
            color: var(--primary-light);
            font-size: 0.9rem;
            transition: all var(--transition);
        }
        .article-body .article-nav a:hover {
            color: var(--primary);
            gap: 12px;
        }
        .article-body .article-nav .next {
            text-align: right;
        }

        /* ===== Sidebar (Article) ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-widget {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 24px 20px;
        }
        .sidebar-widget h3 {
            font-size: 1.05rem;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--secondary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-widget h3 i {
            color: var(--secondary);
        }
        .sidebar-widget .related-item {
            display: flex;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
            align-items: flex-start;
        }
        .sidebar-widget .related-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .sidebar-widget .related-item .thumb {
            width: 70px;
            height: 52px;
            border-radius: 6px;
            overflow: hidden;
            flex-shrink: 0;
            background: var(--bg-body);
        }
        .sidebar-widget .related-item .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
        }
        .sidebar-widget .related-item .info {
            flex: 1;
            min-width: 0;
        }
        .sidebar-widget .related-item .info a {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition);
            text-decoration: none;
        }
        .sidebar-widget .related-item .info a:hover {
            color: var(--primary-light);
        }
        .sidebar-widget .related-item .info .date {
            font-size: 0.75rem;
            color: var(--text-light);
            margin-top: 4px;
        }
        .sidebar-widget .cta-card {
            text-align: center;
            padding: 12px 0 4px;
        }
        .sidebar-widget .cta-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }
        .sidebar-widget .cta-btn {
            display: inline-block;
            background: var(--secondary);
            color: var(--primary-dark);
            font-weight: 700;
            padding: 10px 28px;
            border-radius: 30px;
            font-size: 0.9rem;
            transition: all var(--transition);
            text-decoration: none;
            border: none;
        }
        .sidebar-widget .cta-btn:hover {
            background: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(232, 168, 56, 0.3);
            color: var(--primary-dark);
        }

        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr 280px;
                gap: 32px;
            }
            .article-body {
                padding: 28px 24px;
            }
            .article-body .featured-image {
                margin: -28px -24px 24px -24px;
                width: calc(100% + 48px);
            }
        }
        @media (max-width: 768px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .article-body {
                padding: 20px 16px;
            }
            .article-body .featured-image {
                margin: -20px -16px 20px -16px;
                width: calc(100% + 32px);
                max-height: 240px;
            }
            .article-body .article-nav {
                flex-direction: column;
                gap: 12px;
            }
            .article-body .article-nav .next {
                text-align: left;
            }
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .not-found-box i {
            font-size: 3.6rem;
            color: var(--text-light);
            margin-bottom: 20px;
            display: block;
        }
        .not-found-box h2 {
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-secondary);
            margin-bottom: 24px;
            font-size: 1.05rem;
        }
        .not-found-box .back-home {
            display: inline-block;
            background: var(--primary-light);
            color: #fff;
            padding: 12px 32px;
            border-radius: 30px;
            font-weight: 600;
            transition: all var(--transition);
            text-decoration: none;
        }
        .not-found-box .back-home:hover {
            background: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26, 58, 92, 0.2);
            color: #fff;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 56px 0 0;
            margin-top: auto;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .site-footer .footer-brand .logo-text {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 16px;
        }
        .site-footer .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.7;
            max-width: 360px;
        }
        .site-footer h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .site-footer ul li {
            margin-bottom: 10px;
        }
        .site-footer ul a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.88rem;
            transition: color var(--transition);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
        }
        .site-footer ul a:hover {
            color: var(--secondary);
        }
        .site-footer .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0 28px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.35);
            gap: 16px;
        }
        .site-footer .social-links {
            display: flex;
            gap: 14px;
        }
        .site-footer .social-links a {
            color: rgba(255, 255, 255, 0.4);
            font-size: 1.2rem;
            transition: all var(--transition);
            text-decoration: none;
        }
        .site-footer .social-links a:hover {
            color: var(--secondary);
            transform: translateY(-2px);
        }
        @media (max-width: 900px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 520px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 8px;
        }
        .mt-2 {
            margin-top: 16px;
        }
        .mt-3 {
            margin-top: 24px;
        }
        .mb-1 {
            margin-bottom: 8px;
        }
        .mb-2 {
            margin-bottom: 16px;
        }
        .mb-3 {
            margin-bottom: 24px;
        }
        .gap-1 {
            gap: 8px;
        }
        .gap-2 {
            gap: 16px;
        }
        .flex {
            display: flex;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }
        .items-center {
            align-items: center;
        }
        .justify-between {
            justify-content: space-between;
        }
        .truncate {
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ===== Foundation Overrides ===== */
        .grid-container {
            max-width: 1200px;
            padding-left: var(--gap);
            padding-right: var(--gap);
        }
        @media (max-width: 768px) {
            .grid-container {
                padding-left: var(--gap-sm);
                padding-right: var(--gap-sm);
            }
        }
        .cell {
            margin-bottom: 0;
        }
        .grid-x>.cell,
        .grid-margin-x>.cell {
            margin-bottom: 0;
        }
        button,
        .button {
            font-family: var(--font-sans);
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #3b52a0;
            --primary-dark: #0e1a4a;
            --accent: #f7982c;
            --accent-light: #fdb44b;
            --accent-dark: #d97d1a;
            --bg-light: #f6f8fc;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #7a7a9a;
            --text-white: #ffffff;
            --border-light: #e8ecf4;
            --border-medium: #d0d6e4;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(26, 42, 108, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 42, 108, 0.10);
            --shadow-lg: 0 12px 40px rgba(26, 42, 108, 0.14);
            --shadow-hover: 0 16px 48px rgba(26, 42, 108, 0.18);
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --sidebar-width: 240px;
            --header-height: 0px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-light);
            display: flex;
            min-height: 100vh;
        }

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

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

        a:hover,
        a:focus {
            color: var(--primary-light);
        }

        a:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

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

        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        ul {
            list-style: none;
        }

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

        /* ===== 容器 ===== */
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 左侧竖向导航 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--primary-dark);
            color: var(--text-white);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            box-shadow: 4px 0 20px rgba(0, 0, 0, 0.15);
            transition: var(--transition);
            overflow-y: auto;
        }

        .sidebar .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 28px 20px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .sidebar .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 20px;
            color: var(--primary-dark);
            flex-shrink: 0;
        }

        .sidebar .logo-text {
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0.5px;
            color: var(--text-white);
        }

        .sidebar .nav-menu {
            flex: 1;
            padding: 16px 12px;
        }

        .sidebar .nav-menu li {
            margin-bottom: 4px;
        }

        .sidebar .nav-menu a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.75);
            font-weight: 500;
            font-size: 15px;
            transition: var(--transition);
            position: relative;
        }

        .sidebar .nav-menu a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: rgba(255, 255, 255, 0.5);
            transition: var(--transition);
        }

        .sidebar .nav-menu a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: var(--text-white);
        }

        .sidebar .nav-menu a:hover i {
            color: var(--accent-light);
        }

        .sidebar .nav-menu a.active {
            background: rgba(247, 152, 44, 0.18);
            color: var(--accent-light);
            font-weight: 600;
        }

        .sidebar .nav-menu a.active i {
            color: var(--accent);
        }

        .sidebar .nav-menu a.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 24px;
            background: var(--accent);
            border-radius: 0 3px 3px 0;
        }

        .sidebar .nav-footer {
            padding: 16px 20px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .sidebar .nav-footer i {
            font-size: 14px;
            color: var(--accent-light);
        }

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

        /* ===== Hero / 内页Banner ===== */
        .page-hero {
            position: relative;
            padding: 80px 0 72px;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: var(--text-white);
            text-align: center;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(14, 26, 74, 0.88) 0%, rgba(26, 42, 108, 0.76) 100%);
            z-index: 1;
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
        }

        .page-hero h1 {
            font-size: 44px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .page-hero p {
            font-size: 20px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .page-hero .hero-badge {
            display: inline-block;
            background: rgba(247, 152, 44, 0.2);
            color: var(--accent-light);
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 20px;
            border: 1px solid rgba(247, 152, 44, 0.25);
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 72px 0;
        }

        .section-label {
            display: inline-block;
            background: rgba(26, 42, 108, 0.08);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--text-primary);
            letter-spacing: -0.3px;
        }

        .section-subtitle {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.6;
        }

        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }

        .section-header .section-subtitle {
            margin: 0 auto;
        }

        /* ===== 卡片网格 ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

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

        .service-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .service-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--border-medium);
        }

        .service-card .card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: rgba(26, 42, 108, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--primary);
            margin-bottom: 20px;
            transition: var(--transition);
        }

        .service-card:hover .card-icon {
            background: var(--primary);
            color: var(--text-white);
        }

        .service-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .service-card p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .service-card .card-tag {
            display: inline-block;
            background: rgba(247, 152, 44, 0.1);
            color: var(--accent-dark);
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
        }

        /* ===== 特色区块 ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .feature-item {
            text-align: center;
            padding: 36px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .feature-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .feature-item .feat-icon {
            font-size: 38px;
            color: var(--accent);
            margin-bottom: 18px;
            display: block;
        }

        .feature-item h4 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .feature-item p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        /* ===== 流程步骤 ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .step-item {
            text-align: center;
            position: relative;
            padding: 32px 16px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .step-item:hover {
            box-shadow: var(--shadow-md);
        }

        .step-item::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 32px;
            background: var(--primary);
            color: var(--text-white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
            box-shadow: 0 4px 12px rgba(26, 42, 108, 0.25);
        }

        .step-item .step-icon {
            font-size: 32px;
            color: var(--primary-light);
            margin-bottom: 14px;
            margin-top: 8px;
            display: block;
        }

        .step-item h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== 覆盖图片卡片 ===== */
        .cover-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            aspect-ratio: 16 / 10;
        }

        .cover-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-md);
            transition: var(--transition);
        }

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

        .cover-card .cover-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(14, 26, 74, 0.7) 0%, rgba(14, 26, 74, 0.1) 60%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 24px 20px;
            border-radius: var(--radius-md);
        }

        .cover-card .cover-overlay h4 {
            color: var(--text-white);
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .cover-card .cover-overlay p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 14px;
        }

        /* ===== 图文区块 ===== */
        .media-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .media-block.reverse {
            direction: rtl;
        }

        .media-block.reverse>* {
            direction: ltr;
        }

        .media-block .media-text h2 {
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .media-block .media-text p {
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .media-block .media-text ul {
            margin-top: 12px;
        }

        .media-block .media-text ul li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 10px;
            color: var(--text-secondary);
            font-size: 15px;
        }

        .media-block .media-text ul li i {
            color: var(--accent);
            margin-top: 4px;
            flex-shrink: 0;
        }

        .media-block .media-image img {
            width: 100%;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-item summary {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 16px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-primary);
            transition: var(--transition);
            list-style: none;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 13px;
            color: var(--text-light);
            transition: var(--transition);
        }

        .faq-item[open] summary::after {
            transform: rotate(180deg);
            color: var(--accent);
        }

        .faq-item[open] summary {
            color: var(--primary);
            border-bottom: 1px solid var(--border-light);
        }

        .faq-item .faq-answer {
            padding: 18px 24px 22px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 80px 0;
            text-align: center;
            position: relative;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(14, 26, 74, 0.9) 0%, rgba(26, 42, 108, 0.8) 100%);
            z-index: 1;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        .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, 0.8);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.6;
        }

        .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 34px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
        }

        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--accent-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(247, 152, 44, 0.35);
        }

        .btn-outline-light {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255, 255, 255, 0.4);
        }

        .btn-outline-light:hover,
        .btn-outline-light:focus {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--text-white);
            color: var(--text-white);
            transform: translateY(-2px);
        }

        /* ===== 统计数字 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }

        .stat-item .stat-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-item .stat-label {
            font-size: 15px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* ===== 标签 / 徽章 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 14px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 600;
        }

        .badge-primary {
            background: rgba(26, 42, 108, 0.08);
            color: var(--primary);
        }

        .badge-accent {
            background: rgba(247, 152, 44, 0.12);
            color: var(--accent-dark);
        }

        /* ===== 标签列表 ===== */
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-list a {
            padding: 6px 18px;
            border-radius: 30px;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .tag-list a:hover {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

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

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 56px 0 32px;
            margin-top: auto;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .site-footer .footer-brand .logo-text {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 6px;
            margin-bottom: 14px;
        }

        .site-footer .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }

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

        .site-footer ul li {
            margin-bottom: 10px;
        }

        .site-footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: var(--transition);
        }

        .site-footer ul li a:hover {
            color: var(--accent-light);
            padding-left: 4px;
        }

        .site-footer .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        .site-footer .social-links {
            display: flex;
            gap: 14px;
        }

        .site-footer .social-links a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.6);
            font-size: 16px;
            transition: var(--transition);
        }

        .site-footer .social-links a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }

        /* ===== 图片区装饰 ===== */
        .image-showcase {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .image-showcase .img-main {
            grid-column: 1 / -1;
            aspect-ratio: 16/9;
        }

        .image-showcase .img-sub {
            aspect-ratio: 4/3;
        }

        /* ===== 响应式 ===== */

        /* 平板 1024px */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 200px;
            }

            .page-hero h1 {
                font-size: 36px;
            }

            .section-title {
                font-size: 28px;
            }

            .grid-3,
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }

            .steps {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .site-footer .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }

            .media-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .media-block.reverse {
                direction: ltr;
            }
        }

        /* 手机 768px */
        @media (max-width: 768px) {
            body {
                flex-direction: column;
            }

            .sidebar {
                position: relative;
                width: 100%;
                height: auto;
                flex-direction: row;
                flex-wrap: wrap;
                padding: 12px 20px;
                box-shadow: 0 2px 12px rgba(0, 0, 0, 0.12);
            }

            .sidebar .logo-area {
                padding: 0;
                border-bottom: none;
                flex: 1;
            }

            .sidebar .logo-text {
                font-size: 18px;
            }

            .sidebar .nav-menu {
                display: flex;
                flex-wrap: wrap;
                gap: 4px;
                padding: 8px 0 0;
                flex: 0 0 100%;
                order: 3;
                border-top: 1px solid rgba(255, 255, 255, 0.08);
                margin-top: 8px;
                padding-top: 8px;
            }

            .sidebar .nav-menu li {
                margin-bottom: 0;
                flex: 1 0 auto;
            }

            .sidebar .nav-menu a {
                padding: 8px 12px;
                font-size: 13px;
                justify-content: center;
            }

            .sidebar .nav-menu a i {
                font-size: 14px;
            }

            .sidebar .nav-menu a.active::before {
                display: none;
            }

            .sidebar .nav-footer {
                display: none;
            }

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

            .page-hero {
                padding: 48px 0 40px;
            }

            .page-hero h1 {
                font-size: 28px;
            }

            .page-hero p {
                font-size: 16px;
            }

            .section {
                padding: 48px 0;
            }

            .section-title {
                font-size: 24px;
            }

            .section-subtitle {
                font-size: 16px;
            }

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

            .grid-4 {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

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

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .stat-item .stat-number {
                font-size: 30px;
            }

            .service-card {
                padding: 24px 20px;
            }

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

            .site-footer .footer-bottom {
                flex-direction: column;
                gap: 16px;
                text-align: center;
            }

            .cta-section {
                padding: 48px 0;
            }

            .cta-section h2 {
                font-size: 26px;
            }

            .cta-section p {
                font-size: 16px;
            }

            .btn-group {
                flex-direction: column;
                align-items: center;
            }

            .btn {
                width: 100%;
                max-width: 280px;
                justify-content: center;
            }

            .image-showcase {
                grid-template-columns: 1fr;
            }

            .media-block .media-text h2 {
                font-size: 24px;
            }
        }

        /* 小手机 520px */
        @media (max-width: 520px) {
            .sidebar .nav-menu a {
                font-size: 12px;
                padding: 6px 8px;
            }

            .sidebar .nav-menu a i {
                font-size: 12px;
            }

            .page-hero h1 {
                font-size: 24px;
            }

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

            .grid-4 {
                grid-template-columns: 1fr;
            }

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

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

            .stat-item .stat-number {
                font-size: 26px;
            }

            .container {
                padding: 0 16px;
            }

            .service-card {
                padding: 20px 16px;
            }

            .service-card .card-icon {
                width: 44px;
                height: 44px;
                font-size: 20px;
            }

            .faq-item summary {
                padding: 14px 16px;
                font-size: 15px;
            }

            .faq-item .faq-answer {
                padding: 14px 16px 18px;
                font-size: 14px;
            }
        }

        /* ===== Foundation 覆盖 ===== */
        .grid-container {
            max-width: 1240px;
            padding: 0 24px;
        }

        @media (max-width: 768px) {
            .grid-container {
                padding: 0 16px;
            }
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a6c;
            --primary-dark: #0f1a4a;
            --primary-light: #4a6cf7;
            --secondary: #f0a500;
            --secondary-light: #ffc34d;
            --accent: #e94e77;
            --bg-body: #f8f9fc;
            --bg-card: #ffffff;
            --bg-dark: #0f1a2e;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #8888a8;
            --text-white: #ffffff;
            --border-light: #e8e8f0;
            --border-medium: #d0d0e0;
            --shadow-sm: 0 2px 8px rgba(26, 42, 108, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 42, 108, 0.10);
            --shadow-lg: 0 16px 48px rgba(26, 42, 108, 0.14);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: all 0.30s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --sidebar-width: 240px;
            --header-height: 0px;
            --content-max-width: 1200px;
        }

        /* ===== 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-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            display: flex;
            min-height: 100vh;
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== 侧边导航 ===== */
        .sidebar-wrapper {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-dark);
            color: var(--text-white);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            box-shadow: 2px 0 20px rgba(0, 0, 0, 0.25);
            transition: var(--transition);
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
            height: 100%;
            padding: 28px 0 20px;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 0 24px 30px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            color: #fff;
            flex-shrink: 0;
        }

        .logo-text {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: 0.5px;
        }

        .nav-menu {
            flex: 1;
            padding: 20px 12px 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .nav-menu li a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.70);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }

        .nav-menu li a i {
            width: 20px;
            text-align: center;
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.50);
            transition: var(--transition);
        }

        .nav-menu li a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .nav-menu li a:hover i {
            color: var(--secondary-light);
        }

        .nav-menu li a.active {
            background: rgba(74, 108, 247, 0.20);
            color: #fff;
            font-weight: 600;
        }
        .nav-menu li a.active i {
            color: var(--primary-light);
        }
        .nav-menu li a.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 24px;
            background: var(--primary-light);
            border-radius: 0 4px 4px 0;
        }

        .nav-footer {
            padding: 20px 24px 0;
            font-size: 0.80rem;
            color: rgba(255, 255, 255, 0.35);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin-top: auto;
            display: flex;
            align-items: center;
            gap: 6px;
        }

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

        /* ===== 页面头部横幅 ===== */
        .page-banner {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, #2d1b69 100%);
            padding: 80px 40px 70px;
            position: relative;
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--bg-body), transparent);
        }
        .banner-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .banner-content h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .banner-content p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.80);
            max-width: 640px;
            line-height: 1.8;
        }
        .banner-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 0.80rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 18px;
            border: 1px solid rgba(255, 255, 255, 0.10);
            letter-spacing: 0.5px;
        }

        /* ===== 板块通用 ===== */
        .section-block {
            padding: 70px 40px;
        }
        .section-block .container {
            max-width: var(--content-max-width);
        }
        .section-title {
            font-size: 2.0rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
            letter-spacing: -0.3px;
        }
        .section-sub {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin-bottom: 44px;
            line-height: 1.7;
        }
        .section-sub.centered {
            text-align: center;
            margin-left: auto;
            margin-right: auto;
        }
        .section-title.centered {
            text-align: center;
        }

        .text-center {
            text-align: center;
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 36px 28px 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary-light), var(--secondary));
            opacity: 0;
            transition: var(--transition);
        }
        .service-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--border-medium);
        }
        .service-card:hover::before {
            opacity: 1;
        }
        .service-card .icon-wrap {
            width: 54px;
            height: 54px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(74, 108, 247, 0.10), rgba(233, 78, 119, 0.08));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary-light);
            margin-bottom: 20px;
            transition: var(--transition);
        }
        .service-card:hover .icon-wrap {
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            color: #fff;
            transform: scale(1.05);
        }
        .service-card h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .service-card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .service-card .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 6px;
        }
        .service-card .tag-list .tag {
            background: var(--bg-body);
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.78rem;
            color: var(--text-secondary);
            border: 1px solid var(--border-light);
        }

        /* ===== 图文交替 ===== */
        .alt-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .alt-grid.reverse {
            direction: rtl;
        }
        .alt-grid.reverse>* {
            direction: ltr;
        }
        .alt-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            background: var(--border-light);
        }
        .alt-image img {
            width: 100%;
            height: 360px;
            object-fit: cover;
            display: block;
        }
        .alt-text h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
            letter-spacing: -0.3px;
        }
        .alt-text p {
            font-size: 1.02rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .alt-text .feature-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .alt-text .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 0.98rem;
            color: var(--text-primary);
        }
        .alt-text .feature-list li i {
            color: var(--primary-light);
            margin-top: 4px;
            flex-shrink: 0;
        }

        /* ===== 数据 / 统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .stat-item .number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary-light);
            line-height: 1.1;
            margin-bottom: 6px;
        }
        .stat-item .label {
            font-size: 0.95rem;
            color: var(--text-secondary);
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            position: relative;
            transition: var(--transition);
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-card::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 2.8rem;
            font-weight: 800;
            color: rgba(74, 108, 247, 0.10);
            line-height: 1;
        }
        .step-card .step-icon {
            font-size: 2.2rem;
            color: var(--primary-light);
            margin-bottom: 16px;
        }
        .step-card h4 {
            font-size: 1.10rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .step-card p {
            font-size: 0.90rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            max-width: 960px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            padding: 20px 22px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            cursor: pointer;
        }
        .faq-item:hover {
            border-color: var(--border-medium);
            box-shadow: var(--shadow-sm);
        }
        .faq-item .question {
            font-weight: 600;
            font-size: 1.0rem;
            color: var(--text-primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
        }
        .faq-item .question i {
            color: var(--primary-light);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .faq-item .answer {
            margin-top: 10px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .answer {
            display: block;
        }
        .faq-item.open .question i {
            transform: rotate(180deg);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            border-radius: var(--radius-lg);
            padding: 60px 50px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section h2 {
            font-size: 2.0rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            position: relative;
            z-index: 2;
        }
        .cta-section p {
            font-size: 1.08rem;
            color: rgba(255, 255, 255, 0.80);
            max-width: 560px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 2;
        }
        .cta-section .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            line-height: 1.4;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            background: transparent;
            color: inherit;
        }
        .btn-primary {
            background: var(--secondary);
            color: var(--primary-dark);
        }
        .btn-primary:hover {
            background: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(240, 165, 0, 0.35);
            color: var(--primary-dark);
        }
        .btn-outline-light {
            border: 2px solid rgba(255, 255, 255, 0.35);
            color: #fff;
            background: transparent;
        }
        .btn-outline-light:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.10);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline-primary {
            border: 2px solid var(--primary-light);
            color: var(--primary-light);
            background: transparent;
        }
        .btn-outline-primary:hover {
            background: var(--primary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(74, 108, 247, 0.25);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 60px 40px 30px;
            margin-top: auto;
        }
        .site-footer .container {
            max-width: var(--content-max-width);
            margin: 0 auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .logo-text {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            display: block;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.60);
            max-width: 340px;
        }
        .site-footer h4 {
            font-size: 1.0rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .site-footer ul li {
            margin-bottom: 8px;
        }
        .site-footer ul li a {
            color: rgba(255, 255, 255, 0.60);
            font-size: 0.90rem;
            transition: var(--transition);
        }
        .site-footer ul li a:hover {
            color: var(--secondary-light);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.40);
        }
        .social-links {
            display: flex;
            gap: 14px;
        }
        .social-links a {
            color: rgba(255, 255, 255, 0.50);
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .social-links a:hover {
            color: var(--secondary-light);
            transform: scale(1.1);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 16px 40px 0;
            font-size: 0.88rem;
            color: var(--text-light);
            background: var(--bg-body);
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--primary-light);
        }
        .breadcrumb span {
            color: var(--text-light);
        }
        .breadcrumb i {
            font-size: 0.7rem;
            color: var(--text-light);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .alt-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .alt-grid.reverse {
                direction: ltr;
            }
            .faq-grid {
                grid-template-columns: 1fr;
            }
            .page-banner {
                padding: 60px 30px 50px;
                min-height: 220px;
            }
            .banner-content h1 {
                font-size: 2.2rem;
            }
            .section-block {
                padding: 50px 30px;
            }
            .cta-section {
                padding: 40px 30px;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 768px) {
            body {
                flex-direction: column;
            }
            .sidebar-wrapper {
                position: relative;
                width: 100%;
                height: auto;
                box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
            }
            .sidebar-nav {
                padding: 16px 0 12px;
                flex-direction: row;
                flex-wrap: wrap;
                align-items: center;
                justify-content: space-between;
            }
            .logo-area {
                padding: 0 20px 0;
                border-bottom: none;
                flex-shrink: 0;
            }
            .nav-menu {
                flex-direction: row;
                padding: 8px 12px 0;
                gap: 2px;
                flex-wrap: wrap;
                flex: 1;
                justify-content: flex-end;
            }
            .nav-menu li a {
                padding: 8px 14px;
                font-size: 0.85rem;
            }
            .nav-menu li a.active::before {
                display: none;
            }
            .nav-footer {
                display: none;
            }
            .main-content {
                margin-left: 0;
            }
            .page-banner {
                padding: 40px 24px 40px;
                min-height: 180px;
            }
            .banner-content h1 {
                font-size: 1.8rem;
            }
            .banner-content p {
                font-size: 1.0rem;
            }
            .section-block {
                padding: 40px 20px;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
            .alt-image img {
                height: 240px;
            }
            .breadcrumb {
                padding: 12px 20px 0;
                font-size: 0.82rem;
                flex-wrap: wrap;
            }
            .cta-section {
                padding: 32px 20px;
                border-radius: var(--radius-md);
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .cta-section .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .stat-item .number {
                font-size: 2.0rem;
            }
        }

        @media (max-width: 520px) {
            .logo-area .logo-text {
                font-size: 1.0rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.95rem;
            }
            .nav-menu li a {
                padding: 6px 10px;
                font-size: 0.78rem;
            }
            .banner-content h1 {
                font-size: 1.4rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .stat-item {
                padding: 20px 14px;
            }
            .stat-item .number {
                font-size: 1.8rem;
            }
            .service-card {
                padding: 24px 18px 22px;
            }
            .section-title {
                font-size: 1.3rem;
            }
        }

        /* ===== 辅助 ===== */
        .mt-1 {
            margin-top: 12px;
        }
        .mt-2 {
            margin-top: 24px;
        }
        .mb-1 {
            margin-bottom: 12px;
        }
        .mb-2 {
            margin-bottom: 24px;
        }
        .gap-1 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .text-light {
            color: var(--text-light);
        }