/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1e40af;
            --primary-light: #3b82f6;
            --primary-dark: #1e3a8a;
            --secondary: #f59e0b;
            --secondary-light: #fbbf24;
            --secondary-dark: #d97706;
            --bg-dark: #0f172a;
            --bg-darker: #020617;
            --bg-light: #f8fafc;
            --bg-card: #ffffff;
            --text-dark: #0f172a;
            --text-body: #334155;
            --text-light: #64748b;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.10);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.15);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --sidebar-width: 240px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
        }
        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body { font-family: var(--font-sans); background: var(--bg-light); color: var(--text-body); line-height: 1.7; font-size: 16px; }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        ul { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-dark); line-height: 1.25; font-weight: 700; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .container-wide { max-width: 1400px; margin: 0 auto; padding: 0 24px; }
        /* ===== 布局 ===== */
        .layout-wrapper { display: flex; min-height: 100vh; }
        /* ===== 侧边导航 (桌面) ===== */
        .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: 32px 20px;
            transition: var(--transition); overflow-y: auto;
            border-right: 1px solid rgba(255,255,255,0.05);
        }
        .sidebar-nav .logo {
            font-size: 20px; font-weight: 800; letter-spacing: 0.5px;
            color: #fff; padding: 0 8px 28px; border-bottom: 1px solid rgba(255,255,255,0.08);
            display: flex; align-items: center; gap: 10px;
        }
        .sidebar-nav .logo i { color: var(--secondary); font-size: 24px; }
        .sidebar-nav .logo span { background: linear-gradient(135deg, #fff 60%, var(--secondary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
        .sidebar-nav .nav-list { margin-top: 32px; flex: 1; display: flex; flex-direction: column; gap: 4px; }
        .sidebar-nav .nav-list a {
            display: flex; align-items: center; gap: 14px; padding: 12px 16px;
            border-radius: var(--radius-sm); color: rgba(255,255,255,0.7);
            font-weight: 500; font-size: 15px; transition: var(--transition);
        }
        .sidebar-nav .nav-list a i { width: 20px; text-align: center; font-size: 16px; }
        .sidebar-nav .nav-list a:hover { background: rgba(255,255,255,0.08); color: #fff; }
        .sidebar-nav .nav-list a.active { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(30,64,175,0.4); }
        .sidebar-nav .nav-footer {
            padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.06);
            font-size: 12px; color: rgba(255,255,255,0.3); text-align: center;
        }
        /* ===== 主内容区 ===== */
        .main-content { margin-left: var(--sidebar-width); flex: 1; min-height: 100vh; }
        /* ===== 移动端顶部导航 ===== */
        .mobile-header {
            display: none; position: fixed; top: 0; left: 0; right: 0; z-index: 1100;
            background: var(--bg-dark); padding: 12px 20px;
            align-items: center; justify-content: space-between;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .mobile-header .logo { color: #fff; font-size: 18px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
        .mobile-header .logo i { color: var(--secondary); }
        .mobile-header .hamburger { background: none; color: #fff; font-size: 24px; cursor: pointer; padding: 4px; }
        .mobile-menu-overlay {
            display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 1050;
        }
        .mobile-menu-panel {
            position: fixed; top: 0; left: -280px; width: 270px; height: 100vh;
            background: var(--bg-dark); color: #fff; z-index: 1060;
            padding: 28px 20px; transition: var(--transition); overflow-y: auto;
        }
        .mobile-menu-panel.open { left: 0; }
        .mobile-menu-panel .close-btn { background: none; color: rgba(255,255,255,0.6); font-size: 22px; position: absolute; top: 16px; right: 16px; cursor: pointer; }
        .mobile-menu-panel .logo { font-size: 18px; font-weight: 700; padding-bottom: 20px; border-bottom: 1px solid rgba(255,255,255,0.08); display: flex; align-items: center; gap: 8px; }
        .mobile-menu-panel .logo i { color: var(--secondary); }
        .mobile-menu-panel .nav-list { margin-top: 24px; display: flex; flex-direction: column; gap: 4px; }
        .mobile-menu-panel .nav-list 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: 15px;
        }
        .mobile-menu-panel .nav-list a i { width: 20px; }
        .mobile-menu-panel .nav-list a:hover { background: rgba(255,255,255,0.08); color: #fff; }
        .mobile-menu-panel .nav-list a.active { background: var(--primary); color: #fff; }
        /* ===== 通用板块间距 ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-card); }
        .section-dark { background: var(--bg-dark); color: var(--text-white); }
        .section-dark h2, .section-dark h3 { color: #fff; }
        .section-title { font-size: 34px; font-weight: 800; text-align: center; margin-bottom: 12px; letter-spacing: -0.5px; }
        .section-subtitle { text-align: center; color: var(--text-light); font-size: 17px; max-width: 640px; margin: 0 auto 48px; line-height: 1.6; }
        .section-dark .section-subtitle { color: rgba(255,255,255,0.6); }
        /* ===== Hero ===== */
        .hero {
            position: relative; min-height: 85vh; display: flex; align-items: center;
            background: linear-gradient(135deg, rgba(15,23,42,0.92) 0%, rgba(30,64,175,0.75) 100%), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            color: #fff; padding: 40px 24px; overflow: hidden;
        }
        .hero::after {
            content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 160px;
            background: linear-gradient(to top, var(--bg-light) 0%, transparent 100%);
        }
        .hero-content { position: relative; z-index: 2; max-width: 800px; margin: 0 auto; text-align: center; }
        .hero-badge {
            display: inline-block; background: rgba(245,158,11,0.2); backdrop-filter: blur(8px); border: 1px solid rgba(245,158,11,0.3);
            padding: 6px 20px; border-radius: 50px; font-size: 14px; color: var(--secondary-light); margin-bottom: 24px;
            letter-spacing: 0.5px; font-weight: 500;
        }
        .hero h1 { font-size: clamp(36px, 6vw, 62px); font-weight: 900; line-height: 1.12; margin-bottom: 20px; color: #fff; letter-spacing: -1px; }
        .hero h1 span { background: linear-gradient(135deg, var(--secondary) 0%, #fff 80%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
        .hero p { font-size: clamp(16px, 2vw, 20px); color: rgba(255,255,255,0.8); max-width: 600px; margin: 0 auto 32px; line-height: 1.7; }
        .hero-actions { 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; cursor: pointer;
            transition: var(--transition); border: none; justify-content: center;
        }
        .btn-primary { background: var(--secondary); color: var(--bg-dark); box-shadow: 0 8px 28px rgba(245,158,11,0.3); }
        .btn-primary:hover { background: var(--secondary-light); transform: translateY(-2px); box-shadow: 0 12px 36px rgba(245,158,11,0.4); }
        .btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.3); }
        .btn-outline:hover { border-color: var(--secondary); color: var(--secondary); background: rgba(245,158,11,0.1); transform: translateY(-2px); }
        .btn-white { background: #fff; color: var(--primary-dark); box-shadow: var(--shadow-md); }
        .btn-white:hover { background: var(--bg-light); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card); border-radius: var(--radius-md); overflow: hidden;
            box-shadow: var(--shadow-sm); transition: var(--transition); border: 1px solid var(--border);
        }
        .card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .card-image { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
        .card-body { padding: 24px; }
        .card-body h3 { font-size: 20px; margin-bottom: 8px; }
        .card-body p { color: var(--text-light); font-size: 15px; line-height: 1.6; }
        .card-tag {
            display: inline-block; padding: 3px 14px; border-radius: 50px; font-size: 12px; font-weight: 600;
            background: rgba(30,64,175,0.08); color: var(--primary); margin-bottom: 12px;
        }
        /* ===== 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; }
        /* ===== 特性/图标卡片 ===== */
        .feature-card {
            text-align: center; padding: 36px 24px; border-radius: var(--radius-md);
            background: var(--bg-card); border: 1px solid var(--border); transition: var(--transition);
        }
        .feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); border-color: var(--primary-light); }
        .feature-card .icon-box {
            width: 64px; height: 64px; margin: 0 auto 20px; border-radius: 16px;
            display: flex; align-items: center; justify-content: center; font-size: 28px;
            background: rgba(30,64,175,0.08); color: var(--primary);
        }
        .feature-card h3 { font-size: 20px; margin-bottom: 8px; }
        .feature-card p { color: var(--text-light); font-size: 15px; line-height: 1.6; }
        /* ===== 统计 ===== */
        .stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
        .stat-item .number { font-size: 42px; font-weight: 900; color: var(--secondary); line-height: 1; }
        .stat-item .label { color: rgba(255,255,255,0.7); font-size: 15px; margin-top: 8px; }
        /* ===== 流程步骤 ===== */
        .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .step-item { text-align: center; position: relative; }
        .step-item .step-num {
            width: 52px; height: 52px; margin: 0 auto 16px; border-radius: 50%;
            background: var(--primary); color: #fff; font-size: 22px; font-weight: 800;
            display: flex; align-items: center; justify-content: center;
            box-shadow: 0 8px 24px rgba(30,64,175,0.25);
        }
        .step-item h4 { font-size: 18px; margin-bottom: 6px; }
        .step-item p { color: var(--text-light); font-size: 14px; line-height: 1.5; }
        .step-item:not(:last-child)::after {
            content: '→'; position: absolute; top: 14px; right: -18px;
            font-size: 24px; color: var(--secondary); font-weight: 300;
        }
        /* ===== 内容列表 (CMS) ===== */
        .cms-list .cms-item {
            display: flex; gap: 20px; padding: 20px 0; border-bottom: 1px solid var(--border);
        }
        .cms-list .cms-item:last-child { border-bottom: none; }
        .cms-list .cms-thumb { width: 120px; height: 80px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; }
        .cms-list .cms-info { flex: 1; }
        .cms-list .cms-info h4 { font-size: 17px; font-weight: 600; margin-bottom: 4px; transition: var(--transition); }
        .cms-list .cms-info h4:hover { color: var(--primary); }
        .cms-list .cms-info .meta { font-size: 13px; color: var(--text-light); display: flex; gap: 16px; margin-top: 6px; }
        .cms-list .cms-info .meta span { display: flex; align-items: center; gap: 4px; }
        .cms-list .cms-info .desc { color: var(--text-light); font-size: 14px; margin-top: 6px; line-height: 1.5; }
        .cms-empty { text-align: center; padding: 40px; color: var(--text-light); font-size: 16px; }
        /* ===== FAQ ===== */
        .faq-item {
            border-bottom: 1px solid var(--border); padding: 20px 0; cursor: pointer;
        }
        .faq-item:first-child { border-top: 1px solid var(--border); }
        .faq-question {
            display: flex; justify-content: space-between; align-items: center;
            font-size: 17px; font-weight: 600; color: var(--text-dark);
        }
        .faq-question i { color: var(--primary); transition: var(--transition); font-size: 18px; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer { max-height: 0; overflow: hidden; transition: var(--transition); color: var(--text-light); font-size: 15px; line-height: 1.7; }
        .faq-item.open .faq-answer { max-height: 300px; padding-top: 14px; }
        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            padding: 80px 24px; text-align: center; color: #fff; border-radius: var(--radius-lg);
            margin: 0 24px; position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.08; mix-blend-mode: overlay;
        }
        .cta-section h2 { font-size: 36px; font-weight: 800; color: #fff; margin-bottom: 12px; position: relative; }
        .cta-section p { color: rgba(255,255,255,0.8); font-size: 17px; max-width: 560px; margin: 0 auto 28px; position: relative; }
        .cta-section .btn { position: relative; }
        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-darker); color: rgba(255,255,255,0.6); padding: 48px 24px 24px;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
        .footer-brand .logo { font-size: 20px; font-weight: 800; color: #fff; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
        .footer-brand .logo i { color: var(--secondary); }
        .footer-brand p { font-size: 14px; line-height: 1.7; max-width: 300px; }
        .footer-col h4 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 16px; }
        .footer-col a { display: block; padding: 4px 0; font-size: 14px; color: rgba(255,255,255,0.5); }
        .footer-col a:hover { color: var(--secondary); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 20px; text-align: center; font-size: 13px; }
        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .sidebar-nav { display: none; }
            .mobile-header { display: flex; }
            .main-content { margin-left: 0; padding-top: 64px; }
            .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .stat-grid { grid-template-columns: repeat(2, 1fr); }
            .steps { grid-template-columns: repeat(2, 1fr); }
            .step-item:not(:last-child)::after { display: none; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .cta-section { margin: 0 16px; padding: 56px 20px; }
            .cta-section h2 { font-size: 28px; }
        }
        @media (max-width: 768px) {
            .section { padding: 56px 0; }
            .section-title { font-size: 26px; }
            .section-subtitle { font-size: 15px; margin-bottom: 32px; }
            .hero { min-height: 70vh; padding: 60px 20px 40px; }
            .hero h1 { font-size: 30px; }
            .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 20px; }
            .stat-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .stat-item .number { font-size: 32px; }
            .steps { grid-template-columns: 1fr 1fr; gap: 20px; }
            .step-item:not(:last-child)::after { display: none; }
            .cms-list .cms-item { flex-direction: column; }
            .cms-list .cms-thumb { width: 100%; height: 180px; }
            .cta-section h2 { font-size: 24px; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .hero-actions { flex-direction: column; align-items: center; }
            .hero-actions .btn { width: 100%; max-width: 280px; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 26px; }
            .section-title { font-size: 22px; }
            .steps { grid-template-columns: 1fr; }
            .stat-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .stat-item .number { font-size: 28px; }
            .mobile-header .logo { font-size: 15px; }
            .btn { padding: 12px 24px; font-size: 14px; }
        }
        /* ===== 辅助 ===== */
        .text-gradient { background: linear-gradient(135deg, var(--secondary) 0%, #fff 80%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
        .gap-2 { gap: 8px; }
        .gap-4 { gap: 16px; }
        .mt-2 { margin-top: 8px; }
        .mt-4 { margin-top: 16px; }
        .mt-6 { margin-top: 24px; }
        .mt-8 { margin-top: 32px; }
        .mb-4 { margin-bottom: 16px; }
        .mb-6 { margin-bottom: 24px; }
        .mb-8 { margin-bottom: 32px; }
        .text-center { text-align: center; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
        .line-clamp-2 { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .line-clamp-3 { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
        .shadow-hover { transition: var(--transition); }
        .shadow-hover:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1e3c72;
            --primary-light: #2a5298;
            --primary-dark: #0f2347;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --text-dark: #1e293b;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s ease;
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --sidebar-width: 260px;
        }

        /* ===== Reset / Base ===== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-dark);
            line-height: 1.7;
            font-size: 16px;
            display: flex;
            min-height: 100vh;
            flex-direction: column;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul {
            list-style: none;
        }

        /* ===== Sidebar Navigation (Desktop) ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--primary-dark);
            color: #fff;
            display: flex;
            flex-direction: column;
            z-index: 1000;
            overflow-y: auto;
            box-shadow: 2px 0 20px rgba(0,0,0,0.15);
        }
        .sidebar .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 32px 24px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .sidebar .logo i {
            font-size: 28px;
            color: var(--accent);
        }
        .sidebar .logo span {
            font-size: 18px;
            font-weight: 700;
            letter-spacing: 0.5px;
            line-height: 1.2;
        }
        .sidebar .nav-list {
            padding: 16px 0;
            flex: 1;
        }
        .sidebar .nav-list li a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 24px;
            color: rgba(255,255,255,0.7);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            border-left: 3px solid transparent;
        }
        .sidebar .nav-list li a i {
            width: 22px;
            text-align: center;
            font-size: 16px;
        }
        .sidebar .nav-list li a:hover,
        .sidebar .nav-list li a.active {
            background: rgba(255,255,255,0.08);
            color: #fff;
            border-left-color: var(--accent);
        }
        .sidebar .nav-footer {
            padding: 20px 24px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 13px;
            color: rgba(255,255,255,0.5);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar .nav-footer i {
            color: var(--accent);
        }

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

        /* ===== Article Page Specific ===== */
        .article-hero {
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: var(--primary-dark);
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') no-repeat center/cover;
            opacity: 0.3;
        }
        .article-hero .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,35,71,0.85) 0%, rgba(30,60,114,0.75) 100%);
        }
        .article-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            padding: 40px 20px;
        }
        .article-hero .hero-content h1 {
            font-size: clamp(28px, 5vw, 48px);
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 16px;
        }
        .article-hero .meta-badge {
            display: inline-flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            color: rgba(255,255,255,0.8);
            font-size: 14px;
        }
        .article-hero .meta-badge span {
            background: rgba(255,255,255,0.12);
            padding: 4px 14px;
            border-radius: 20px;
            backdrop-filter: blur(4px);
        }
        .article-hero .meta-badge i {
            margin-right: 6px;
        }

        .article-body {
            max-width: 800px;
            margin: 0 auto;
            padding: 48px 20px;
        }
        .article-body .featured-image {
            border-radius: var(--radius);
            overflow: hidden;
            margin-bottom: 32px;
            box-shadow: var(--shadow);
        }
        .article-body .content-text {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-dark);
        }
        .article-body .content-text p {
            margin-bottom: 20px;
        }
        .article-body .content-text h2,
        .article-body .content-text h3 {
            margin-top: 32px;
            margin-bottom: 16px;
            font-weight: 700;
            color: var(--primary);
        }
        .article-body .content-text img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
        }
        .article-body .content-text ul {
            list-style: disc;
            padding-left: 24px;
            margin-bottom: 20px;
        }
        .article-body .content-text li {
            margin-bottom: 8px;
        }
        .article-body .content-text blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 24px;
            background: #f1f5f9;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
            font-style: italic;
            color: var(--text-muted);
        }
        .not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .not-found h2 {
            font-size: 28px;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .not-found p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .not-found a {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            padding: 12px 32px;
            border-radius: 30px;
            font-weight: 600;
        }
        .not-found a:hover {
            background: var(--primary-light);
        }

        /* ===== Share & CTA ===== */
        .share-cta {
            max-width: 800px;
            margin: 0 auto;
            padding: 40px 20px;
            border-top: 1px solid var(--border);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .share-cta .share-label {
            font-weight: 600;
            color: var(--text-muted);
            font-size: 14px;
        }
        .share-cta .share-buttons {
            display: flex;
            gap: 12px;
        }
        .share-cta .share-buttons a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--border);
            color: var(--text-muted);
            transition: var(--transition);
        }
        .share-cta .share-buttons a:hover {
            background: var(--primary);
            color: #fff;
        }
        .share-cta .cta-btn {
            background: var(--accent);
            color: #fff;
            padding: 12px 28px;
            border-radius: 30px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .share-cta .cta-btn:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            max-width: 800px;
            margin: 0 auto;
            padding: 48px 20px;
        }
        .faq-section h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 32px;
            text-align: center;
        }
        .faq-item {
            border-bottom: 1px solid var(--border);
            padding: 18px 0;
        }
        .faq-item summary {
            font-size: 17px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            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: 14px;
            transition: transform 0.3s;
            color: var(--accent);
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding-top: 12px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.8);
            padding: 60px 20px 30px;
            margin-top: auto;
        }
        .container-wide {
            max-width: 1200px;
            margin: 0 auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-brand .logo i {
            font-size: 28px;
            color: var(--accent);
        }
        .footer-brand .logo span {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255,255,255,0.6);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.6);
            font-size: 14px;
            margin-bottom: 10px;
            transition: var(--transition);
        }
        .footer-col a i {
            margin-right: 8px;
            width: 18px;
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 24px;
            font-size: 13px;
            text-align: center;
            color: rgba(255,255,255,0.4);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                width: 100%;
                height: auto;
                position: relative;
                flex-direction: row;
                flex-wrap: wrap;
                justify-content: space-between;
                padding: 12px 20px;
                box-shadow: 0 2px 12px rgba(0,0,0,0.1);
            }
            .sidebar .logo {
                padding: 0;
                border: none;
            }
            .sidebar .logo span {
                font-size: 16px;
            }
            .sidebar .nav-list {
                display: none;
                width: 100%;
                padding: 12px 0;
                order: 3;
                border-top: 1px solid rgba(255,255,255,0.1);
                margin-top: 12px;
            }
            .sidebar .nav-list.show {
                display: block;
            }
            .sidebar .nav-list li a {
                padding: 12px 16px;
            }
            .sidebar .nav-footer {
                display: none;
            }
            .main-wrapper {
                margin-left: 0;
            }
            .article-hero {
                min-height: 200px;
            }
            .article-hero .hero-content h1 {
                font-size: 26px;
            }
            .article-body {
                padding: 24px 16px;
            }
            .share-cta {
                flex-direction: column;
                align-items: stretch;
                text-align: center;
            }
            .share-cta .share-buttons {
                justify-content: center;
            }
            .faq-section {
                padding: 32px 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer {
                padding: 40px 16px 20px;
            }
        }

        @media (max-width: 520px) {
            .article-hero .hero-content h1 {
                font-size: 22px;
            }
            .article-body .content-text {
                font-size: 15px;
            }
            .faq-section h2 {
                font-size: 22px;
            }
        }

        /* ===== Mobile Menu Toggle ===== */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 24px;
            cursor: pointer;
            padding: 4px 8px;
        }
        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e11d48;
            --primary-dark: #be123c;
            --primary-light: #fda4af;
            --primary-bg: #fff1f2;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --dark: #0f172a;
            --dark-2: #1e293b;
            --gray-900: #111827;
            --gray-800: #1f2937;
            --gray-700: #374151;
            --gray-600: #4b5563;
            --gray-500: #6b7280;
            --gray-400: #9ca3af;
            --gray-300: #d1d5db;
            --gray-200: #e5e7eb;
            --gray-100: #f3f4f6;
            --gray-50: #f9fafb;
            --white: #ffffff;
            --radius: 12px;
            --radius-lg: 20px;
            --radius-sm: 8px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::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(--gray-800);
            background: var(--white);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        button {
            cursor: pointer;
            background: none;
        }

        ul {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container-wide {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .container {
            max-width: 1120px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 左侧导航 ===== */
        .sidebar-wrap {
            display: flex;
            min-height: 100vh;
        }

        .sidebar-nav {
            width: 260px;
            min-height: 100vh;
            background: var(--dark);
            color: var(--white);
            display: flex;
            flex-direction: column;
            padding: 32px 20px;
            position: fixed;
            left: 0;
            top: 0;
            z-index: 100;
            transition: var(--transition);
            box-shadow: 4px 0 20px rgba(0, 0, 0, 0.2);
        }

        .sidebar-nav .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 20px;
            font-weight: 700;
            padding: 0 8px 28px 8px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            margin-bottom: 24px;
            color: var(--white);
        }

        .sidebar-nav .logo i {
            color: var(--primary);
            font-size: 26px;
        }

        .sidebar-nav .nav-list {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-nav .nav-list li a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--gray-300);
            font-weight: 500;
            font-size: 15px;
            transition: var(--transition);
        }

        .sidebar-nav .nav-list li a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
        }

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

        .sidebar-nav .nav-list li a.active {
            background: var(--primary);
            color: var(--white);
            box-shadow: 0 4px 14px rgba(225, 29, 72, 0.35);
        }

        .sidebar-nav .nav-footer {
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            color: var(--gray-500);
            font-size: 13px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-nav .nav-footer i {
            color: var(--accent);
        }

        /* ===== 右侧内容区 ===== */
        .main-content {
            margin-left: 260px;
            flex: 1;
            min-height: 100vh;
            background: var(--gray-50);
        }

        /* ===== 移动端导航按钮 ===== */
        .mobile-toggle {
            display: none;
            position: fixed;
            top: 16px;
            right: 16px;
            z-index: 200;
            background: var(--dark);
            color: var(--white);
            width: 44px;
            height: 44px;
            border-radius: 50%;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: var(--shadow-lg);
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }

        .mobile-toggle:hover {
            background: var(--primary);
        }

        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 90;
            backdrop-filter: blur(4px);
        }

        /* ===== 页面标题区域 ===== */
        .page-hero {
            position: relative;
            padding: 80px 0 64px;
            background: var(--dark);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 0;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(30, 41, 59, 0.7) 100%);
            z-index: 1;
        }

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

        .page-hero h1 {
            font-size: 42px;
            font-weight: 800;
            color: var(--white);
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

        .page-hero h1 i {
            color: var(--primary);
            margin-right: 12px;
        }

        .page-hero p {
            font-size: 18px;
            color: var(--gray-300);
            max-width: 640px;
            line-height: 1.8;
        }

        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(225, 29, 72, 0.2);
            color: var(--primary-light);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 20px;
            border: 1px solid rgba(225, 29, 72, 0.3);
        }

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

        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--gray-500);
            max-width: 560px;
            line-height: 1.7;
        }

        .section-header {
            margin-bottom: 48px;
        }

        .section-header.centered {
            text-align: center;
        }

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

        /* ===== 卡片 ===== */
        .card {
            background: var(--white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            overflow: hidden;
            border: 1px solid var(--gray-100);
        }

        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        .card-body {
            padding: 28px 24px;
        }

        .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }

        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 16px;
            background: var(--primary-bg);
            color: var(--primary);
        }

        .card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--dark);
        }

        .card p {
            color: var(--gray-600);
            font-size: 15px;
            line-height: 1.7;
        }

        /* ===== 标签/徽章 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            background: var(--primary-bg);
            color: var(--primary);
        }

        .badge-accent {
            background: #fef3c7;
            color: #b45309;
        }

        .badge-green {
            background: #ecfdf5;
            color: #047857;
        }

        .badge-blue {
            background: #eff6ff;
            color: #1d4ed8;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            text-align: center;
            justify-content: center;
        }

        .btn-primary {
            background: var(--primary);
            color: var(--white);
            box-shadow: 0 4px 14px rgba(225, 29, 72, 0.3);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 8px 24px rgba(225, 29, 72, 0.4);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            color: var(--white);
            border: 2px solid rgba(255, 255, 255, 0.3);
        }

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

        .btn-accent {
            background: var(--accent);
            color: var(--dark);
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
        }

        .btn-accent:hover {
            background: var(--accent-dark);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.4);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 10px 22px;
            font-size: 14px;
        }

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

        .stat-item {
            text-align: center;
            padding: 28px 16px;
            border-radius: var(--radius);
            background: var(--white);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--gray-100);
        }

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

        .stat-item .num span {
            font-size: 24px;
        }

        .stat-item .label {
            font-size: 15px;
            color: var(--gray-600);
            margin-top: 6px;
        }

        /* ===== 流程步骤 ===== */
        .step-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            counter-reset: step-counter;
        }

        .step-card {
            background: var(--white);
            border-radius: var(--radius);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--gray-100);
            position: relative;
            transition: var(--transition);
            text-align: center;
        }

        .step-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        .step-card .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            margin: 0 auto 16px;
            box-shadow: 0 4px 12px rgba(225, 29, 72, 0.25);
        }

        .step-card h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--dark);
        }

        .step-card p {
            font-size: 14px;
            color: var(--gray-500);
            line-height: 1.6;
        }

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

        .feature-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 4/3;
            object-fit: cover;
            width: 100%;
        }

        .feature-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .feature-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .feature-item .icon-box {
            width: 44px;
            height: 44px;
            min-width: 44px;
            border-radius: 10px;
            background: var(--primary-bg);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
        }

        .feature-item h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 4px;
        }

        .feature-item p {
            font-size: 15px;
            color: var(--gray-500);
            line-height: 1.6;
        }

        /* ===== 适用场景 ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .scene-card {
            background: var(--white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--gray-100);
            transition: var(--transition);
        }

        .scene-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        .scene-card .scene-img {
            height: 180px;
            object-fit: cover;
            width: 100%;
        }

        .scene-card .scene-body {
            padding: 22px 20px;
        }

        .scene-card .scene-body h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--dark);
        }

        .scene-card .scene-body p {
            font-size: 14px;
            color: var(--gray-500);
            line-height: 1.7;
        }

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

        .faq-item {
            background: var(--white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--gray-200);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: var(--gray-300);
        }

        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 16px;
            color: var(--dark);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }

        .faq-question:hover {
            background: var(--gray-50);
        }

        .faq-question i {
            color: var(--gray-400);
            transition: var(--transition);
            font-size: 14px;
        }

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

        .faq-answer {
            padding: 0 24px 18px 24px;
            font-size: 15px;
            color: var(--gray-600);
            line-height: 1.7;
            display: none;
        }

        .faq-answer.show {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--dark);
            position: relative;
            overflow: hidden;
            padding: 72px 0;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 41, 59, 0.8) 100%);
            z-index: 1;
        }

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

        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--white);
            margin-bottom: 16px;
        }

        .cta-section p {
            font-size: 18px;
            color: var(--gray-300);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

        .cta-section .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--dark-2);
            color: var(--gray-300);
            padding: 56px 0 24px;
        }

        .footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer .footer-brand .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 14px;
        }

        .footer .footer-brand .logo i {
            color: var(--primary);
        }

        .footer .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--gray-500);
            max-width: 320px;
        }

        .footer .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 16px;
        }

        .footer .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--gray-500);
            padding: 4px 0;
            transition: var(--transition);
        }

        .footer .footer-col a:hover {
            color: var(--white);
        }

        .footer .footer-col a i {
            margin-right: 8px;
            width: 16px;
        }

        .footer .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 13px;
            color: var(--gray-600);
            text-align: center;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .feature-image {
                order: -1;
            }
            .footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .page-hero h1 {
                font-size: 34px;
            }
        }

        @media (max-width: 768px) {
            .sidebar-nav {
                transform: translateX(-100%);
                width: 280px;
            }
            .sidebar-nav.open {
                transform: translateX(0);
            }
            .main-content {
                margin-left: 0;
            }
            .mobile-toggle {
                display: flex;
            }
            .mobile-overlay.show {
                display: block;
            }
            .section {
                padding: 48px 0;
            }
            .page-hero {
                padding: 56px 0 48px;
                min-height: 240px;
            }
            .page-hero h1 {
                font-size: 28px;
            }
            .page-hero p {
                font-size: 15px;
            }
            .section-title {
                font-size: 26px;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .num {
                font-size: 30px;
            }
            .step-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .scene-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .cta-section h2 {
                font-size: 28px;
            }
            .cta-section p {
                font-size: 15px;
            }
            .feature-grid {
                gap: 24px;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        @media (max-width: 520px) {
            .container,
            .container-wide {
                padding: 0 16px;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .step-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 20px 12px;
            }
            .stat-item .num {
                font-size: 26px;
            }
            .page-hero h1 {
                font-size: 24px;
            }
            .section-title {
                font-size: 22px;
            }
            .btn {
                padding: 12px 24px;
                font-size: 14px;
            }
            .faq-question {
                font-size: 15px;
                padding: 14px 18px;
            }
            .faq-answer {
                padding: 0 18px 14px 18px;
                font-size: 14px;
            }
            .card-body {
                padding: 20px 16px;
            }
            .scene-card .scene-body {
                padding: 16px;
            }
            .cta-section {
                padding: 48px 0;
            }
            .cta-section .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            .footer {
                padding: 36px 0 20px;
            }
        }

        /* ===== 辅助 ===== */
        .gap-2 {
            gap: 8px;
        }
        .gap-3 {
            gap: 12px;
        }
        .gap-4 {
            gap: 16px;
        }
        .gap-6 {
            gap: 24px;
        }
        .fw-700 {
            font-weight: 700;
        }
        .text-primary {
            color: var(--primary);
        }
        .text-accent {
            color: var(--accent);
        }
        .mt-2 {
            margin-top: 8px;
        }
        .mt-4 {
            margin-top: 16px;
        }
        .mt-6 {
            margin-top: 24px;
        }
        .mt-8 {
            margin-top: 32px;
        }
        .mb-2 {
            margin-bottom: 8px;
        }
        .mb-4 {
            margin-bottom: 16px;
        }
        .mb-6 {
            margin-bottom: 24px;
        }

        /* 图片 hover 效果 */
        .img-zoom {
            overflow: hidden;
        }
        .img-zoom img {
            transition: transform 0.5s ease;
        }
        .img-zoom:hover img {
            transform: scale(1.05);
        }

        /* 分隔装饰 */
        .divider {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 16px 0 20px;
        }
        .divider.center {
            margin-left: auto;
            margin-right: auto;
        }