/* roulang page: index */
:root {
            --sidebar-width: 250px;
            --sidebar-bg: #1b2333;
            --sidebar-hover: #252f42;
            --sidebar-active: #2a364d;
            --sidebar-text: #c5cddb;
            --sidebar-text-active: #ffffff;
            --accent-gold: #f0a825;
            --accent-gold-hover: #e09610;
            --accent-gold-light: #fef5e0;
            --primary-blue: #4a7ab5;
            --primary-blue-hover: #3a6698;
            --primary-blue-light: #e8f0f9;
            --bg-body: #f4f6f9;
            --bg-white: #ffffff;
            --text-main: #2c3345;
            --text-secondary: #5e6778;
            --text-muted: #8b919e;
            --border-light: #e4e7ed;
            --border-card: #eef0f4;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.06), 0 2px 6px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.05);
            --shadow-xl: 0 20px 48px rgba(0,0,0,0.10), 0 8px 20px rgba(0,0,0,0.06);
            --radius-xs: 6px;
            --radius-sm: 10px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 24px;
            --transition-fast: 0.18s ease;
            --transition-smooth: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
        }

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

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.65;
            color: var(--text-main);
            background-color: var(--bg-body);
            min-height: 100vh;
            display: flex;
            flex-direction: row;
            overflow-x: hidden;
        }

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

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

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

        button {
            cursor: pointer;
        }

        ul, ol {
            list-style: none;
        }

        h1, h2, h3, h4, h5, h6 {
            line-height: 1.3;
            font-weight: 600;
            color: var(--text-main);
        }

        :focus-visible {
            outline: 2px solid var(--accent-gold);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ============ 侧边栏导航 ============ */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--sidebar-bg);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition-smooth);
            box-shadow: 2px 0 24px rgba(0,0,0,0.15);
            overflow-y: auto;
            overflow-x: hidden;
        }

        .sidebar-brand {
            padding: 22px 24px 18px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            flex-shrink: 0;
        }

        .sidebar-brand a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.02em;
        }

        .sidebar-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--accent-gold) 0%, #e8a020 100%);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            color: #1b2333;
            flex-shrink: 0;
        }

        .sidebar-nav {
            flex: 1;
            padding: 16px 14px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--sidebar-text);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition-fast);
            position: relative;
            letter-spacing: 0.01em;
        }

        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 1.05rem;
            flex-shrink: 0;
        }

        .sidebar-nav a:hover {
            background: var(--sidebar-hover);
            color: #e8ecf2;
        }

        .sidebar-nav a.active {
            background: var(--sidebar-active);
            color: var(--sidebar-text-active);
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--accent-gold);
        }

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

        .sidebar-search {
            padding: 12px 16px 20px;
            border-top: 1px solid rgba(255,255,255,0.08);
            flex-shrink: 0;
        }

        .sidebar-search-inner {
            display: flex;
            align-items: center;
            background: rgba(255,255,255,0.06);
            border-radius: var(--radius-sm);
            padding: 9px 14px;
            gap: 8px;
            transition: background var(--transition-fast);
        }

        .sidebar-search-inner:focus-within {
            background: rgba(255,255,255,0.12);
        }

        .sidebar-search-inner i {
            color: var(--sidebar-text);
            font-size: 0.9rem;
            opacity: 0.7;
        }

        .sidebar-search-inner input {
            flex: 1;
            background: transparent;
            color: #e8ecf2;
            font-size: 0.9rem;
            min-width: 0;
        }

        .sidebar-search-inner input::placeholder {
            color: rgba(197,205,219,0.5);
        }

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

        .container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 28px;
            width: 100%;
        }

        .section {
            padding: 60px 0;
        }

        .section-sm {
            padding: 40px 0;
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--primary-blue);
            background: var(--primary-blue-light);
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin-bottom: 36px;
            max-width: 600px;
            line-height: 1.6;
        }

        .section-header {
            text-align: center;
            margin-bottom: 44px;
        }

        .section-header .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* ============ 移动端菜单按钮 ============ */
        .mobile-menu-toggle {
            display: none;
            position: fixed;
            top: 14px;
            left: 14px;
            z-index: 1100;
            width: 42px;
            height: 42px;
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-md);
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--text-main);
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .mobile-menu-toggle:hover {
            background: #f0f2f5;
            box-shadow: var(--shadow-lg);
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.45);
            z-index: 999;
            transition: opacity var(--transition-smooth);
        }

        .sidebar-overlay.active {
            display: block;
            opacity: 1;
        }

        /* ============ Hero ============ */
        .hero {
            background: linear-gradient(160deg, rgba(27,35,51,0.82) 0%, rgba(27,35,51,0.65) 40%, rgba(30,45,65,0.75) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 70px 0 80px;
            position: relative;
            color: #ffffff;
            border-radius: 0 0 var(--radius-xl) var(--radius-xl);
            margin: 0 16px 0 0;
            overflow: hidden;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, rgba(244,246,249,0.08) 0%, transparent 100%);
            pointer-events: none;
        }

        .hero-inner {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            gap: 48px;
            flex-wrap: wrap;
        }

        .hero-text {
            flex: 1;
            min-width: 280px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.14);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255,255,255,0.2);
            padding: 8px 18px;
            border-radius: 24px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
            color: #fef5e0;
            letter-spacing: 0.02em;
        }

        .hero-badge i {
            color: var(--accent-gold);
            font-size: 0.75rem;
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .hero-title .highlight {
            color: var(--accent-gold);
            position: relative;
        }

        .hero-desc {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.85);
            margin-bottom: 32px;
            line-height: 1.7;
            max-width: 520px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 26px;
            border-radius: 28px;
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: 0.01em;
            transition: all var(--transition-fast);
            white-space: nowrap;
            cursor: pointer;
            border: 2px solid transparent;
        }

        .btn-primary {
            background: var(--accent-gold);
            color: #1b2333;
            border-color: var(--accent-gold);
            box-shadow: 0 4px 16px rgba(240,168,37,0.35);
        }

        .btn-primary:hover {
            background: var(--accent-gold-hover);
            border-color: var(--accent-gold-hover);
            box-shadow: 0 6px 22px rgba(240,168,37,0.45);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(240,168,37,0.3);
        }

        .btn-outline {
            background: transparent;
            color: #ffffff;
            border-color: rgba(255,255,255,0.5);
        }

        .btn-outline:hover {
            background: rgba(255,255,255,0.1);
            border-color: rgba(255,255,255,0.8);
            transform: translateY(-2px);
        }

        .btn-outline:active {
            transform: translateY(0);
        }

        .btn-sm {
            padding: 9px 18px;
            font-size: 0.85rem;
            border-radius: 22px;
        }

        .btn-lg {
            padding: 16px 34px;
            font-size: 1.05rem;
            border-radius: 32px;
        }

        .hero-visual {
            flex: 0 0 340px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-card-preview {
            background: rgba(255,255,255,0.1);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(255,255,255,0.18);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            width: 100%;
            max-width: 340px;
            box-shadow: var(--shadow-xl);
        }

        .hero-card-preview .preview-dot {
            display: flex;
            gap: 6px;
            margin-bottom: 18px;
        }

        .hero-card-preview .preview-dot span {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: rgba(255,255,255,0.4);
        }

        .hero-card-preview .preview-dot span:first-child {
            background: var(--accent-gold);
        }

        .hero-card-preview .preview-line {
            height: 8px;
            background: rgba(255,255,255,0.2);
            border-radius: 4px;
            margin-bottom: 10px;
        }

        .hero-card-preview .preview-line.short {
            width: 60%;
        }

        .hero-card-preview .preview-line.medium {
            width: 80%;
        }

        .hero-card-preview .preview-btn {
            margin-top: 18px;
            height: 36px;
            background: var(--accent-gold);
            border-radius: 18px;
            opacity: 0.85;
        }

        /* ============ 特色卡片 ============ */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 30px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-card);
            transition: all var(--transition-smooth);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 3px;
            background: var(--accent-gold);
            border-radius: 0 0 4px 4px;
            opacity: 0;
            transition: all var(--transition-smooth);
        }

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

        .feature-card:hover::before {
            opacity: 1;
            width: 70px;
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.5rem;
            background: var(--primary-blue-light);
            color: var(--primary-blue);
            transition: all var(--transition-smooth);
        }

        .feature-card:nth-child(2) .feature-icon {
            background: #fef5e0;
            color: #d4940a;
        }

        .feature-card:nth-child(3) .feature-icon {
            background: #e8f5e9;
            color: #388e3c;
        }

        .feature-card:nth-child(4) .feature-icon {
            background: #f3e5f5;
            color: #7b1fa2;
        }

        .feature-card:hover .feature-icon {
            transform: scale(1.08);
        }

        .feature-card h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: var(--text-main);
        }

        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.55;
        }

        /* ============ 分类入口 ============ */
        .category-entry-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
            max-width: 700px;
            margin: 0 auto;
        }

        .category-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-card);
            display: flex;
            transition: all var(--transition-smooth);
            cursor: pointer;
        }

        .category-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }

        .category-card-img {
            flex: 0 0 200px;
            min-height: 160px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .category-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .category-card-body {
            flex: 1;
            padding: 24px 28px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .category-card-body .tag {
            display: inline-block;
            background: var(--accent-gold-light);
            color: #8b6914;
            font-size: 0.78rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 14px;
            margin-bottom: 10px;
            width: fit-content;
            letter-spacing: 0.03em;
        }

        .category-card-body h3 {
            font-size: 1.3rem;
            margin-bottom: 6px;
        }

        .category-card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.55;
            margin-bottom: 12px;
        }

        .category-card-body .arrow-link {
            color: var(--primary-blue);
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition-fast);
        }

        .category-card:hover .arrow-link {
            gap: 8px;
        }

        /* ============ 数据统计 ============ */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-card);
            transition: all var(--transition-smooth);
        }

        .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.02em;
            margin-bottom: 4px;
            line-height: 1;
        }

        .stat-number .plus {
            color: var(--accent-gold);
            font-size: 1.5rem;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .stat-card:nth-child(1) .stat-number { color: #4a7ab5; }
        .stat-card:nth-child(2) .stat-number { color: #e09610; }
        .stat-card:nth-child(3) .stat-number { color: #388e3c; }
        .stat-card:nth-child(4) .stat-number { color: #7b1fa2; }

        /* ============ 资讯列表 ============ */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .news-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-card);
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }

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

        .news-card-img {
            height: 170px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .news-card-img .news-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--accent-gold);
            color: #1b2333;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 12px;
            letter-spacing: 0.03em;
        }

        .news-card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card-body h4 {
            font-size: 1rem;
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card-body p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.5;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .news-card-body .news-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 20px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 2px dashed var(--border-light);
            color: var(--text-muted);
            font-size: 1rem;
        }

        /* ============ 流程步骤 ============ */
        .steps-container {
            display: flex;
            gap: 0;
            align-items: flex-start;
            position: relative;
            flex-wrap: wrap;
        }

        .steps-container::before {
            content: '';
            position: absolute;
            top: 32px;
            left: 40px;
            right: 40px;
            height: 2px;
            background: linear-gradient(to right, var(--accent-gold) 0%, var(--primary-blue) 50%, #e0e3e8 100%);
            z-index: 0;
            border-radius: 1px;
        }

        .step-item {
            flex: 1;
            min-width: 160px;
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 0 12px;
        }

        .step-circle {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--bg-white);
            border: 3px solid var(--border-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-main);
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-sm);
            position: relative;
        }

        .step-item:nth-child(1) .step-circle {
            border-color: var(--accent-gold);
            background: #fefbf3;
            color: #b0780a;
        }

        .step-item:nth-child(2) .step-circle {
            border-color: var(--primary-blue);
            background: #f5f8fc;
            color: #3a6698;
        }

        .step-item:nth-child(3) .step-circle {
            border-color: #388e3c;
            background: #f6faf6;
            color: #2e7d32;
        }

        .step-item:nth-child(4) .step-circle {
            border-color: #7b1fa2;
            background: #faf6fc;
            color: #6a1b9a;
        }

        .step-item:hover .step-circle {
            transform: scale(1.1);
            box-shadow: var(--shadow-md);
        }

        .step-item h4 {
            font-size: 1rem;
            margin-bottom: 4px;
        }

        .step-item p {
            font-size: 0.83rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* ============ FAQ ============ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-card);
            overflow: hidden;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-sm);
        }

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

        .faq-question {
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--text-main);
            user-select: none;
            gap: 12px;
        }

        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 22px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        .faq-item.open .faq-answer {
            max-height: 200px;
            padding: 0 22px 18px;
        }

        /* ============ CTA ============ */
        .cta-section {
            background: linear-gradient(145deg, #1b2333 0%, #253048 100%);
            border-radius: var(--radius-lg);
            padding: 50px 40px;
            text-align: center;
            color: #ffffff;
            position: relative;
            overflow: hidden;
            margin: 0 16px 0 0;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            background: rgba(240,168,37,0.08);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 140px;
            height: 140px;
            background: rgba(74,122,181,0.1);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section h2 {
            color: #ffffff;
            font-size: 1.8rem;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }

        .cta-section p {
            color: rgba(255,255,255,0.8);
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
            font-size: 1rem;
        }

        .cta-section .btn {
            position: relative;
            z-index: 1;
        }

        /* ============ 页脚 ============ */
        .footer {
            background: #ffffff;
            border-top: 1px solid var(--border-light);
            padding: 36px 0;
            margin-top: auto;
        }

        .footer-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }

        .footer-brand {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-brand i {
            color: var(--accent-gold);
            font-size: 1.1rem;
        }

        .footer-links {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
        }

        .footer-links a {
            font-size: 0.88rem;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--primary-blue);
        }

        .footer-copy {
            font-size: 0.82rem;
            color: var(--text-muted);
            flex-basis: 100%;
            text-align: center;
            margin-top: 4px;
        }

        /* ============ 响应式设计 ============ */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 220px;
            }

            .hero-title {
                font-size: 2.4rem;
            }

            .hero-visual {
                flex: 0 0 280px;
            }

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

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

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

            .steps-container::before {
                left: 24px;
                right: 24px;
            }

            .step-item {
                min-width: 130px;
            }

            .category-card {
                flex-direction: column;
            }

            .category-card-img {
                flex: 0 0 160px;
                min-height: 140px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
            }

            .sidebar.open {
                transform: translateX(0);
            }

            .sidebar-overlay.active {
                display: block;
            }

            .mobile-menu-toggle {
                display: flex;
            }

            .main-wrapper {
                margin-left: 0;
                width: 100%;
            }

            .hero {
                margin: 0;
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
                padding: 50px 0 56px;
            }

            .hero-inner {
                flex-direction: column;
                gap: 28px;
            }

            .hero-visual {
                flex: 0 0 auto;
                width: 100%;
                max-width: 300px;
                margin: 0 auto;
            }

            .hero-title {
                font-size: 2rem;
            }

            .hero-desc {
                font-size: 1rem;
            }

            .hero-card-preview {
                max-width: 100%;
            }

            .section {
                padding: 40px 0;
            }

            .section-title {
                font-size: 1.5rem;
            }

            .features-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }

            .feature-card {
                padding: 22px 16px;
            }

            .feature-icon {
                width: 44px;
                height: 44px;
                font-size: 1.2rem;
                margin-bottom: 12px;
            }

            .feature-card h3 {
                font-size: 0.95rem;
            }

            .feature-card p {
                font-size: 0.8rem;
            }

            .news-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

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

            .stat-number {
                font-size: 1.8rem;
            }

            .stat-card {
                padding: 20px 14px;
            }

            .steps-container {
                flex-direction: column;
                gap: 20px;
                align-items: center;
            }

            .steps-container::before {
                display: none;
            }

            .step-item {
                display: flex;
                align-items: center;
                gap: 16px;
                text-align: left;
                width: 100%;
                max-width: 340px;
                min-width: auto;
                padding: 0;
            }

            .step-circle {
                margin: 0;
                width: 48px;
                height: 48px;
                font-size: 1.1rem;
                flex-shrink: 0;
            }

            .category-card {
                flex-direction: column;
            }

            .category-card-img {
                flex: 0 0 140px;
                min-height: 120px;
            }

            .category-card-body {
                padding: 18px 20px;
            }

            .cta-section {
                margin: 0;
                padding: 36px 22px;
                border-radius: var(--radius-md);
            }

            .cta-section h2 {
                font-size: 1.4rem;
            }

            .faq-question {
                font-size: 0.9rem;
                padding: 14px 16px;
            }

            .faq-answer {
                padding: 0 16px;
                font-size: 0.83rem;
            }

            .faq-item.open .faq-answer {
                padding: 0 16px 14px;
            }

            .container {
                padding: 0 16px;
            }

            .footer-inner {
                flex-direction: column;
                text-align: center;
                gap: 12px;
            }

            .footer-links {
                justify-content: center;
                gap: 16px;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.6rem;
            }

            .hero-desc {
                font-size: 0.9rem;
            }

            .btn {
                padding: 11px 20px;
                font-size: 0.88rem;
                border-radius: 24px;
            }

            .btn-lg {
                padding: 13px 24px;
                font-size: 0.95rem;
            }

            .features-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }

            .stat-number {
                font-size: 1.5rem;
            }

            .stat-label {
                font-size: 0.78rem;
            }

            .section-title {
                font-size: 1.3rem;
            }

            .section-subtitle {
                font-size: 0.88rem;
            }

            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }

            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }

            .sidebar {
                width: 260px;
            }
        }

/* roulang page: article */
:root {
            --primary: #4F6EF7;
            --primary-light: #6B86FA;
            --primary-dark: #3A56D4;
            --accent: #FFB74D;
            --accent-light: #FFD180;
            --bg: #F8F9FC;
            --surface: #FFFFFF;
            --text: #1E293B;
            --text-secondary: #64748B;
            --border: #E2E8F0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow-sm: 0 4px 12px rgba(0,0,0,0.04);
            --shadow: 0 8px 24px rgba(0,0,0,0.06);
            --shadow-lg: 0 16px 32px rgba(0,0,0,0.08);
            --sidebar-width: 240px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

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

        .app-shell {
            display: flex;
            min-height: 100vh;
        }

        /* 左侧导航栏 */
        .sidebar {
            width: var(--sidebar-width);
            background: var(--surface);
            border-right: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
        }

        .sidebar-brand {
            padding: 28px 20px 24px;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            border-bottom: 1px solid var(--border);
        }

        .sidebar-brand i {
            font-size: 1.5rem;
            color: var(--accent);
        }

        .sidebar-nav {
            flex: 1;
            padding: 20px 12px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
            font-size: 0.95rem;
        }

        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 1.1rem;
        }

        .sidebar-nav a:hover {
            background: #F1F5F9;
            color: var(--primary);
        }

        .sidebar-nav a.active {
            background: #EEF2FF;
            color: var(--primary);
            font-weight: 600;
            box-shadow: inset 0 0 0 1px var(--primary-light);
        }

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

        .container {
            width: 100%;
            max-width: 850px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 文章主体 */
        .article-main {
            flex: 1;
            padding: 40px 0 60px;
        }

        .article-card {
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            border: 1px solid var(--border);
        }

        .article-cover {
            width: 100%;
            max-height: 460px;
            object-fit: cover;
            display: block;
        }

        .article-body {
            padding: 36px 40px 40px;
        }

        .article-category {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #EEF2FF;
            color: var(--primary-dark);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .article-category i {
            font-size: 0.75rem;
        }

        .article-title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
            color: var(--text);
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-bottom: 28px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border);
        }

        .article-meta i {
            margin-right: 4px;
            font-size: 0.85rem;
        }

        .article-content {
            font-size: 1.05rem;
            line-height: 1.8;
            color: var(--text);
        }

        .article-content h2 {
            font-size: 1.5rem;
            margin: 32px 0 16px;
            color: var(--primary-dark);
        }

        .article-content h3 {
            font-size: 1.25rem;
            margin: 24px 0 12px;
        }

        .article-content p {
            margin-bottom: 18px;
        }

        .article-content ul, .article-content ol {
            margin: 16px 0 24px 24px;
        }

        .article-content li {
            margin-bottom: 8px;
        }

        .article-content img {
            border-radius: var(--radius-sm);
            margin: 20px 0;
            box-shadow: var(--shadow-sm);
        }

        .not-found {
            text-align: center;
            padding: 80px 20px;
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }

        .not-found i {
            font-size: 3rem;
            color: #CBD5E1;
            margin-bottom: 20px;
        }

        .not-found h2 {
            font-size: 1.8rem;
            margin-bottom: 12px;
        }

        .not-found p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 12px 24px;
            border-radius: 30px;
            font-weight: 600;
            transition: background 0.2s, transform 0.1s;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }

        /* 页脚 */
        .footer {
            background: var(--surface);
            border-top: 1px solid var(--border);
            padding: 28px 0;
            margin-top: auto;
        }

        .footer .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            color: var(--primary);
        }

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

        .footer-links {
            display: flex;
            gap: 24px;
        }

        .footer-links a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: color 0.2s;
        }

        .footer-links a:hover {
            color: var(--primary);
        }

        .footer-copy {
            color: var(--text-secondary);
            font-size: 0.85rem;
            width: 100%;
            text-align: center;
            margin-top: 8px;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .container {
                max-width: 100%;
            }
            .article-body {
                padding: 24px 24px 32px;
            }
        }

        @media (max-width: 768px) {
            .app-shell {
                flex-direction: column;
            }

            .sidebar {
                position: relative;
                width: 100%;
                height: auto;
                flex-direction: row;
                align-items: center;
                border-right: none;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-sm);
                padding: 0 16px;
                flex-wrap: wrap;
            }

            .sidebar-brand {
                padding: 16px 0;
                border-bottom: none;
                font-size: 1.1rem;
                flex: 1;
            }

            .sidebar-nav {
                flex-direction: row;
                padding: 8px 0;
                gap: 4px;
                flex: 0 0 auto;
                overflow-x: auto;
                width: 100%;
                justify-content: flex-start;
            }

            .sidebar-nav a {
                padding: 8px 14px;
                font-size: 0.9rem;
                white-space: nowrap;
            }

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

            .article-title {
                font-size: 1.6rem;
            }

            .footer .container {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .article-body {
                padding: 20px 16px 24px;
            }
            .article-title {
                font-size: 1.4rem;
            }
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #6366F1;
            --primary-light: #818CF8;
            --primary-dark: #4F46E5;
            --primary-bg: #EEF2FF;
            --accent: #F59E0B;
            --accent-light: #FBBF24;
            --accent-bg: #FFFBEB;
            --success: #10B981;
            --success-bg: #ECFDF5;
            --bg: #F8FAFC;
            --surface: #FFFFFF;
            --text: #1E293B;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --border-light: #F1F5F9;
            --radius-xl: 20px;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-xs: 6px;
            --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.07);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
            --sidebar-width: 240px;
            --sidebar-narrow: 70px;
            --mobile-header-height: 60px;
            --transition-fast: 0.18s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s ease;
            --font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }

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

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

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            display: flex;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            font-size: inherit;
        }

        input {
            font-family: inherit;
            font-size: inherit;
        }

        ul {
            list-style: none;
        }

        /* ========== 侧边栏导航 ========== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--surface);
            border-right: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            z-index: 100;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition-slow), width var(--transition-slow);
        }

        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 24px 20px;
            border-bottom: 1px solid var(--border-light);
            flex-shrink: 0;
        }

        .sidebar-logo .logo-icon {
            width: 42px;
            height: 42px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
        }

        .sidebar-logo .logo-text {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.01em;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .sidebar-nav {
            flex: 1;
            display: flex;
            flex-direction: column;
            padding: 16px 12px;
            gap: 4px;
            overflow-y: auto;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 13px 16px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .sidebar-nav a i {
            font-size: 18px;
            width: 22px;
            text-align: center;
            flex-shrink: 0;
        }

        .sidebar-nav a span {
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .sidebar-nav a:hover {
            background: var(--primary-bg);
            color: var(--primary);
            transform: translateX(2px);
        }

        .sidebar-nav a.active {
            background: var(--primary-bg);
            color: var(--primary);
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--primary);
            border-radius: var(--radius-md);
        }

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

        .sidebar-footer-tag {
            padding: 16px 20px;
            border-top: 1px solid var(--border-light);
            flex-shrink: 0;
        }

        .sidebar-footer-tag .tag-inner {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 14px;
            background: var(--primary-bg);
            border-radius: var(--radius-md);
            font-size: 13px;
            color: var(--primary-dark);
            font-weight: 500;
        }

        .sidebar-footer-tag .tag-inner i {
            font-size: 16px;
        }

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

        .main-content {
            flex: 1;
        }

        /* ========== 移动端顶部栏 ========== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--mobile-header-height);
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            z-index: 99;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            box-shadow: var(--shadow-xs);
        }

        .mobile-header .mh-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 15px;
            color: var(--text);
        }

        .mobile-header .mh-logo .mh-logo-icon {
            width: 32px;
            height: 32px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 14px;
        }

        .mobile-header .hamburger {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            background: var(--bg);
        }

        .mobile-header .hamburger:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }

        /* 移动端抽屉覆盖层 */
        .drawer-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.5);
            z-index: 98;
            opacity: 0;
            transition: opacity var(--transition-slow);
        }

        .drawer-overlay.show {
            display: block;
            opacity: 1;
        }

        /* 移动端抽屉菜单 */
        .drawer-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 280px;
            height: 100vh;
            background: var(--surface);
            z-index: 99;
            flex-direction: column;
            padding: 20px 16px;
            transform: translateX(-100%);
            transition: transform var(--transition-slow);
            box-shadow: var(--shadow-xl);
            overflow-y: auto;
        }

        .drawer-menu.show {
            transform: translateX(0);
        }

        .drawer-menu .drawer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 20px;
            padding-bottom: 16px;
            border-bottom: 1px solid var(--border-light);
        }

        .drawer-menu .drawer-logo .dl-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
        }

        .drawer-menu .drawer-logo span {
            font-weight: 700;
            font-size: 16px;
        }

        .drawer-menu a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 16px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
        }

        .drawer-menu a i {
            font-size: 18px;
            width: 22px;
            text-align: center;
        }

        .drawer-menu a:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }

        .drawer-menu a.active {
            background: var(--primary-bg);
            color: var(--primary);
            font-weight: 600;
        }

        .drawer-menu .drawer-close {
            position: absolute;
            top: 16px;
            right: 16px;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
        }

        .drawer-menu .drawer-close:hover {
            background: #fee2e2;
            color: #ef4444;
        }

        /* ========== 面包屑 ========== */
        .breadcrumb-bar {
            padding: 20px 0 0 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb .sep {
            font-size: 11px;
            color: var(--border);
        }

        .breadcrumb .current {
            color: var(--text);
            font-weight: 500;
        }

        /* ========== 容器 ========== */
        .container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 32px;
            width: 100%;
        }

        /* ========== 分类Banner ========== */
        .category-banner {
            padding: 40px 0 36px;
        }

        .category-banner .banner-inner {
            display: flex;
            align-items: center;
            gap: 40px;
            background: var(--surface);
            border-radius: var(--radius-xl);
            padding: 44px 48px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
            position: relative;
            overflow: hidden;
        }

        .category-banner .banner-inner::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -60px;
            width: 220px;
            height: 220px;
            background: var(--primary-bg);
            border-radius: 50%;
            opacity: 0.6;
            pointer-events: none;
        }

        .category-banner .banner-text {
            flex: 1;
            position: relative;
            z-index: 1;
        }

        .category-banner .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 18px;
        }

        .category-banner .banner-badge i {
            font-size: 12px;
        }

        .category-banner h1 {
            font-size: 34px;
            font-weight: 750;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: -0.02em;
            line-height: 1.25;
        }

        .category-banner .banner-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 520px;
        }

        .category-banner .banner-image {
            flex-shrink: 0;
            width: 240px;
            position: relative;
            z-index: 1;
        }

        .category-banner .banner-image img {
            width: 100%;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
        }

        /* ========== 板块通用 ========== */
        .section {
            padding: 44px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 36px;
        }

        .section-header .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent-bg);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
        }

        .section-header h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.015em;
            margin-bottom: 8px;
        }

        .section-header .section-sub {
            font-size: 15px;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto;
        }

        /* ========== 步骤流程 ========== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .step-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-xs);
            transition: all var(--transition-base);
            position: relative;
        }

        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: var(--primary-light);
        }

        .step-card .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
            box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
        }

        .step-card h3 {
            font-size: 17px;
            font-weight: 650;
            color: var(--text);
            margin-bottom: 8px;
        }

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

        .step-card .step-icon-hint {
            display: inline-block;
            margin-top: 10px;
            font-size: 13px;
            color: var(--primary);
            font-weight: 500;
            background: var(--primary-bg);
            padding: 4px 12px;
            border-radius: 12px;
        }

        /* 步骤连接线 */
        .step-card::after {
            content: '';
            position: absolute;
            top: 52px;
            right: -18px;
            width: 36px;
            height: 2px;
            background: var(--border);
            z-index: 0;
        }

        .step-card:last-child::after {
            display: none;
        }

        /* ========== 双栏图文 ========== */
        .info-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            align-items: center;
        }

        .info-split .info-image img {
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-lg);
            width: 100%;
        }

        .info-split .info-text h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .info-split .info-text p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 20px;
        }

        .info-split .info-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .info-split .info-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .info-split .info-list li i {
            color: var(--success);
            font-size: 16px;
            margin-top: 2px;
            flex-shrink: 0;
        }

        /* ========== 问题卡片网格 ========== */
        .cards-grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .problem-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-xs);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .problem-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--primary-light);
        }

        .problem-card .pc-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
        }

        .problem-card .pc-icon.blue {
            background: #EFF6FF;
            color: #3B82F6;
        }

        .problem-card .pc-icon.amber {
            background: #FFFBEB;
            color: #F59E0B;
        }

        .problem-card .pc-icon.green {
            background: #ECFDF5;
            color: #10B981;
        }

        .problem-card .pc-icon.purple {
            background: #F5F3FF;
            color: #8B5CF6;
        }

        .problem-card .pc-icon.rose {
            background: #FFF1F2;
            color: #F43F5E;
        }

        .problem-card .pc-icon.teal {
            background: #F0FDFA;
            color: #14B8A6;
        }

        .problem-card h4 {
            font-size: 16px;
            font-weight: 650;
            color: var(--text);
        }

        .problem-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
        }

        .problem-card .pc-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition-fast);
        }

        .problem-card .pc-link:hover {
            gap: 8px;
        }

        /* ========== 安全提示区域 ========== */
        .safety-block {
            background: var(--surface);
            border-radius: var(--radius-xl);
            padding: 40px 44px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-md);
            display: flex;
            gap: 32px;
            align-items: center;
        }

        .safety-block .safety-icon-large {
            flex-shrink: 0;
            width: 100px;
            height: 100px;
            border-radius: 50%;
            background: var(--success-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 42px;
            color: var(--success);
        }

        .safety-block .safety-content h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

        .safety-block .safety-content p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
        }

        .safety-tips {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .safety-tip-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--bg);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            border: 1px solid var(--border);
        }

        .safety-tip-tag i {
            color: var(--success);
            font-size: 12px;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-item {
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-xs);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

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

        .faq-item .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            background: transparent;
            transition: all var(--transition-fast);
            gap: 12px;
        }

        .faq-item .faq-question:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }

        .faq-item .faq-question .faq-arrow {
            flex-shrink: 0;
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition-fast);
        }

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

        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 22px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 20px;
        }

        /* ========== CTA区域 ========== */
        .cta-section {
            padding: 40px 0 56px;
        }

        .cta-block {
            background: linear-gradient(135deg, var(--primary), #4F46E5);
            border-radius: var(--radius-xl);
            padding: 48px 44px;
            text-align: center;
            color: #fff;
            box-shadow: 0 12px 40px rgba(99, 102, 241, 0.35);
            position: relative;
            overflow: hidden;
        }

        .cta-block::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -50px;
            width: 200px;
            height: 200px;
            background: rgba(255, 255, 255, 0.07);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-block::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -30px;
            width: 180px;
            height: 180px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-block h3 {
            font-size: 28px;
            font-weight: 750;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }

        .cta-block p {
            font-size: 16px;
            opacity: 0.9;
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 15px 36px;
            background: #fff;
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 16px;
            border-radius: 30px;
            transition: all var(--transition-base);
            position: relative;
            z-index: 1;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
        }

        .btn-cta-large:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.22);
            background: #f8fafc;
        }

        .btn-cta-large:active {
            transform: translateY(0);
        }

        /* ========== 页脚 ========== */
        .footer {
            background: var(--surface);
            border-top: 1px solid var(--border);
            padding: 28px 0;
            margin-top: auto;
        }

        .footer .footer-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 650;
            color: var(--text);
            font-size: 15px;
        }

        .footer-brand i {
            color: var(--primary);
            font-size: 18px;
        }

        .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .footer-links a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--primary);
        }

        .footer-copy {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ========== 按钮系统 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 11px 22px;
            border-radius: 25px;
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition-base);
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 6px 22px rgba(99, 102, 241, 0.4);
            transform: translateY(-1px);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary-light);
        }

        .btn-outline:hover {
            background: var(--primary-bg);
            border-color: var(--primary);
            transform: translateY(-1px);
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1200px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .step-card::after {
                display: none;
            }
            .cards-grid-3 {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .info-split {
                gap: 28px;
            }
            .category-banner .banner-inner {
                padding: 34px 32px;
                gap: 28px;
            }
            .category-banner h1 {
                font-size: 28px;
            }
            .category-banner .banner-image {
                width: 200px;
            }
        }

        @media (max-width: 1024px) {
            .sidebar {
                width: var(--sidebar-narrow);
            }
            .sidebar-logo .logo-text,
            .sidebar-nav a span,
            .sidebar-footer-tag .tag-inner span {
                display: none;
            }
            .sidebar-logo {
                justify-content: center;
                padding: 18px 10px;
            }
            .sidebar-nav {
                padding: 12px 8px;
                align-items: center;
            }
            .sidebar-nav a {
                justify-content: center;
                padding: 14px;
                gap: 0;
                border-radius: var(--radius-md);
            }
            .sidebar-nav a i {
                font-size: 20px;
            }
            .sidebar-footer-tag {
                padding: 10px;
            }
            .sidebar-footer-tag .tag-inner {
                justify-content: center;
                padding: 10px;
            }
            .main-wrapper {
                margin-left: var(--sidebar-narrow);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cards-grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .container {
                padding: 0 24px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                display: none;
            }
            .main-wrapper {
                margin-left: 0;
                padding-top: var(--mobile-header-height);
            }
            .mobile-header {
                display: flex;
            }
            .drawer-menu {
                display: flex;
            }
            .drawer-overlay {
                display: none;
            }
            .drawer-overlay.show {
                display: block;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .cards-grid-3 {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .info-split {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .info-split .info-image {
                order: -1;
            }
            .category-banner .banner-inner {
                flex-direction: column;
                text-align: center;
                padding: 28px 20px;
                gap: 20px;
            }
            .category-banner h1 {
                font-size: 26px;
            }
            .category-banner .banner-desc {
                max-width: 100%;
            }
            .category-banner .banner-image {
                width: 180px;
                margin: 0 auto;
            }
            .safety-block {
                flex-direction: column;
                text-align: center;
                padding: 28px 20px;
            }
            .safety-tips {
                justify-content: center;
            }
            .cta-block {
                padding: 32px 20px;
            }
            .cta-block h3 {
                font-size: 22px;
            }
            .footer .footer-inner {
                flex-direction: column;
                text-align: center;
                gap: 12px;
            }
            .footer-links {
                justify-content: center;
            }
            .section-header h2 {
                font-size: 23px;
            }
            .container {
                padding: 0 16px;
            }
            .section {
                padding: 32px 0;
            }
            .breadcrumb-bar {
                padding-top: 12px;
            }
        }

        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .category-banner h1 {
                font-size: 22px;
            }
            .category-banner .banner-image {
                width: 140px;
            }
            .section-header h2 {
                font-size: 20px;
            }
            .cta-block h3 {
                font-size: 20px;
            }
            .btn-cta-large {
                padding: 13px 28px;
                font-size: 15px;
            }
            .safety-tip-tag {
                font-size: 12px;
                padding: 6px 12px;
            }
        }