/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #0f1b3d;
            --color-primary-light: #1a2d6a;
            --color-primary-dark: #0a1128;
            --color-accent: #e8a838;
            --color-accent-light: #f0c060;
            --color-accent-dark: #c88a20;
            --color-bg: #f4f6fc;
            --color-bg-alt: #eef1f8;
            --color-white: #ffffff;
            --color-text: #1a1a2e;
            --color-text-light: #5a5a7a;
            --color-text-muted: #8a8aaa;
            --color-border: #e2e6f0;
            --color-border-light: #f0f2f8;
            --color-success: #22c55e;
            --color-warning: #f59e0b;
            --color-danger: #ef4444;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(15, 27, 61, 0.06);
            --shadow-md: 0 8px 24px rgba(15, 27, 61, 0.10);
            --shadow-lg: 0 20px 48px rgba(15, 27, 61, 0.14);
            --shadow-glow: 0 4px 24px rgba(232, 168, 56, 0.30);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 260px;
            --header-height: 0px;
            --max-width: 1200px;
            --gap: 24px;
            --gap-lg: 48px;
        }

        /* ===== 基础重置 ===== */
        *,
        *::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: 1.6;
            color: var(--color-text);
            background: var(--color-bg);
            display: flex;
            min-height: 100vh;
        }

        a {
            color: var(--color-primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--color-accent);
        }
        a:focus-visible {
            outline: 3px solid var(--color-accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        button:focus-visible {
            outline: 3px solid var(--color-accent);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--color-primary);
        }

        h1 {
            font-size: 2.8rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.15rem;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--gap);
            width: 100%;
        }

        /* ===== 左侧导航 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--color-primary);
            color: var(--color-white);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition);
            overflow-y: auto;
            box-shadow: 2px 0 20px rgba(0, 0, 0, 0.2);
        }

        .sidebar-brand {
            padding: 28px 20px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .sidebar-brand .brand-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--color-primary);
            flex-shrink: 0;
        }

        .sidebar-brand .brand-text {
            font-size: 1.1rem;
            font-weight: 700;
            letter-spacing: 0.5px;
            line-height: 1.3;
            color: var(--color-white);
        }
        .sidebar-brand .brand-text small {
            display: block;
            font-size: 0.7rem;
            font-weight: 400;
            opacity: 0.6;
            letter-spacing: 1px;
            margin-top: 2px;
        }

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

        .sidebar-nav .nav-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            opacity: 0.4;
            padding: 12px 12px 6px;
            font-weight: 600;
        }

        .sidebar-nav 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: 0.95rem;
            transition: all var(--transition);
            text-decoration: none;
        }
        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .sidebar-nav a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: var(--color-white);
        }
        .sidebar-nav a.active {
            background: rgba(232, 168, 56, 0.18);
            color: var(--color-accent);
            box-shadow: inset 3px 0 0 var(--color-accent);
        }
        .sidebar-nav a.active i {
            color: var(--color-accent);
        }

        .sidebar-footer {
            padding: 16px 20px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.75rem;
            opacity: 0.4;
            text-align: center;
            line-height: 1.5;
        }

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

        /* ===== 移动端顶部栏 ===== */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 999;
            background: var(--color-primary);
            color: var(--color-white);
            padding: 12px 16px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.15);
        }
        .mobile-header .brand-text {
            font-size: 1rem;
            font-weight: 700;
        }
        .mobile-header .menu-toggle {
            font-size: 1.4rem;
            color: var(--color-white);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
        }
        .mobile-header .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* ===== 遮罩 ===== */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.45);
            z-index: 999;
            backdrop-filter: blur(4px);
        }
        .sidebar-overlay.open {
            display: block;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--color-bg-alt);
        }
        .section-dark {
            background: var(--color-primary);
            color: var(--color-white);
        }
        .section-dark h2,
        .section-dark h3 {
            color: var(--color-white);
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header p {
            color: var(--color-text-light);
            max-width: 600px;
            margin: 0 auto;
            font-size: 1.1rem;
        }
        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.7);
        }

        .section-header .badge {
            display: inline-block;
            background: rgba(232, 168, 56, 0.15);
            color: var(--color-accent-dark);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 50px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .section-dark .section-header .badge {
            background: rgba(232, 168, 56, 0.2);
            color: var(--color-accent-light);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 100px 0 80px;
            background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
            color: var(--color-white);
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 80px;
            background: var(--color-bg);
            clip-path: ellipse(70% 100% at 50% 100%);
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .hero-content h1 {
            font-size: 3rem;
            color: var(--color-white);
            margin-bottom: 16px;
            line-height: 1.2;
        }
        .hero-content h1 span {
            color: var(--color-accent);
        }
        .hero-content p {
            font-size: 1.15rem;
            opacity: 0.85;
            margin-bottom: 28px;
            max-width: 520px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-image {
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .hero-image img {
            max-width: 100%;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            transform: perspective(800px) rotateY(-6deg);
            transition: transform var(--transition);
        }
        .hero-image img:hover {
            transform: perspective(800px) rotateY(0deg);
        }

        .hero-stats {
            display: flex;
            gap: 32px;
            margin-top: 40px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
        }
        .hero-stats .stat-item {
            text-align: center;
        }
        .hero-stats .stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--color-accent);
        }
        .hero-stats .stat-label {
            font-size: 0.85rem;
            opacity: 0.6;
            margin-top: 4px;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            text-decoration: none;
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--color-accent);
            color: var(--color-primary);
            border-color: var(--color-accent);
        }
        .btn-primary:hover {
            background: var(--color-accent-light);
            border-color: var(--color-accent-light);
            color: var(--color-primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }
        .btn-outline {
            background: transparent;
            color: var(--color-white);
            border-color: rgba(255, 255, 255, 0.3);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--color-white);
            color: var(--color-white);
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: var(--color-white);
            color: var(--color-primary);
            border-color: var(--color-white);
        }
        .btn-secondary:hover {
            background: var(--color-bg);
            border-color: var(--color-bg);
            color: var(--color-primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 1.05rem;
        }

        /* ===== 特色卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap);
        }
        .feature-card {
            background: var(--color-white);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--color-accent);
        }
        .feature-card .icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.5rem;
            color: var(--color-accent);
        }
        .feature-card h3 {
            margin-bottom: 10px;
            font-size: 1.15rem;
        }
        .feature-card p {
            color: var(--color-text-light);
            font-size: 0.92rem;
            line-height: 1.6;
        }

        /* ===== 分类卡片 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--gap);
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--color-white);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--color-accent);
        }
        .category-card .card-image {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .category-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .category-card:hover .card-image img {
            transform: scale(1.05);
        }
        .category-card .card-image .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 27, 61, 0.6), transparent);
        }
        .category-card .card-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card .card-body .tag {
            display: inline-block;
            background: rgba(232, 168, 56, 0.12);
            color: var(--color-accent-dark);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 50px;
            margin-bottom: 8px;
            align-self: flex-start;
        }
        .category-card .card-body h3 {
            font-size: 1.2rem;
            margin-bottom: 8px;
        }
        .category-card .card-body p {
            color: var(--color-text-light);
            font-size: 0.9rem;
            line-height: 1.6;
            flex: 1;
        }
        .category-card .card-body .btn {
            align-self: flex-start;
            margin-top: 16px;
        }

        /* ===== 最新资讯列表 ===== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: var(--gap);
        }
        .news-item {
            background: var(--color-white);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }
        .news-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-accent);
            transform: translateX(4px);
        }
        .news-item .news-meta {
            display: flex;
            gap: 12px;
            align-items: center;
            flex-shrink: 0;
            min-width: 140px;
        }
        .news-item .news-meta .date {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            font-weight: 500;
        }
        .news-item .news-meta .cat {
            font-size: 0.75rem;
            background: var(--color-bg-alt);
            color: var(--color-text-light);
            padding: 2px 12px;
            border-radius: 50px;
            font-weight: 500;
        }
        .news-item .news-content {
            flex: 1;
        }
        .news-item .news-content h3 {
            font-size: 1.1rem;
            margin-bottom: 6px;
        }
        .news-item .news-content h3 a {
            color: var(--color-primary);
        }
        .news-item .news-content h3 a:hover {
            color: var(--color-accent);
        }
        .news-item .news-content p {
            color: var(--color-text-light);
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .news-empty {
            text-align: center;
            padding: 48px 20px;
            color: var(--color-text-muted);
            background: var(--color-white);
            border-radius: var(--radius-md);
            border: 1px dashed var(--color-border);
        }
        .news-empty i {
            font-size: 2rem;
            margin-bottom: 12px;
            opacity: 0.4;
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
            counter-reset: step;
        }
        .step-card {
            background: var(--color-white);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            text-align: center;
            position: relative;
            transition: all var(--transition);
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-card::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--color-border);
            line-height: 1;
            transition: color var(--transition);
        }
        .step-card:hover::before {
            color: rgba(232, 168, 56, 0.2);
        }
        .step-card .step-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.4rem;
            color: var(--color-accent);
        }
        .step-card h3 {
            font-size: 1.05rem;
            margin-bottom: 8px;
        }
        .step-card p {
            color: var(--color-text-light);
            font-size: 0.88rem;
            line-height: 1.6;
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
        }
        .stat-card {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition);
        }
        .stat-card:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(232, 168, 56, 0.3);
            transform: translateY(-2px);
        }
        .stat-card .stat-icon {
            font-size: 2rem;
            color: var(--color-accent);
            margin-bottom: 12px;
        }
        .stat-card .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--color-white);
            line-height: 1.2;
        }
        .stat-card .stat-number span {
            font-size: 1.2rem;
            font-weight: 400;
            opacity: 0.6;
        }
        .stat-card .stat-label {
            font-size: 0.9rem;
            opacity: 0.65;
            margin-top: 6px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--color-border);
        }
        .faq-item summary {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 12px;
            list-style: none;
            transition: background var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary:hover {
            background: var(--color-bg);
        }
        .faq-item summary .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--color-primary);
            color: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            flex-shrink: 0;
            transition: all var(--transition);
        }
        .faq-item[open] summary .faq-icon {
            background: var(--color-accent);
            color: var(--color-primary);
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 24px 18px 64px;
            color: var(--color-text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary-light));
            color: var(--color-white);
            text-align: center;
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            color: var(--color-white);
            font-size: 2.2rem;
            margin-bottom: 12px;
        }
        .cta-section p {
            opacity: 0.8;
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-section .btn {
            font-size: 1.05rem;
            padding: 16px 40px;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--color-primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .brand-text {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 8px;
        }
        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer h4 {
            color: var(--color-white);
            font-size: 0.95rem;
            margin-bottom: 16px;
        }
        .footer ul li {
            margin-bottom: 8px;
        }
        .footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.88rem;
            transition: all var(--transition);
        }
        .footer ul li a:hover {
            color: var(--color-accent);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            opacity: 0.5;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom a:hover {
            color: var(--color-accent);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 220px;
            }
            .hero-grid {
                gap: 32px;
            }
            .hero-content h1 {
                font-size: 2.4rem;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .mobile-header {
                display: flex;
            }
            .main-wrapper {
                margin-left: 0;
            }

            .hero {
                padding: 60px 0 48px;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 24px;
                text-align: center;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
            .hero-content p {
                margin-left: auto;
                margin-right: auto;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-stats {
                justify-content: center;
                gap: 24px;
            }
            .hero-image {
                display: none;
            }
            .hero::after {
                height: 40px;
            }

            .section {
                padding: 48px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }

            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .category-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card .stat-number {
                font-size: 1.8rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .news-item {
                flex-direction: column;
                gap: 12px;
                padding: 18px 20px;
            }
            .news-item .news-meta {
                min-width: auto;
                flex-wrap: wrap;
            }

            .faq-item summary {
                padding: 14px 16px;
                font-size: 0.95rem;
            }
            .faq-item .faq-answer {
                padding: 0 16px 14px 52px;
                font-size: 0.9rem;
            }

            .cta-section {
                padding: 48px 0;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }

            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.15rem;
            }
        }

        @media (max-width: 520px) {
            :root {
                --gap: 16px;
            }
            .hero-content h1 {
                font-size: 1.6rem;
            }
            .hero-stats {
                flex-wrap: wrap;
                gap: 16px;
            }
            .hero-stats .stat-number {
                font-size: 1.4rem;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .stat-card {
                padding: 20px 12px;
            }
            .stat-card .stat-number {
                font-size: 1.5rem;
            }
            .btn-lg {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 滚动条美化 ===== */
        .sidebar::-webkit-scrollbar {
            width: 4px;
        }
        .sidebar::-webkit-scrollbar-track {
            background: transparent;
        }
        .sidebar::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.15);
            border-radius: 10px;
        }
        .sidebar::-webkit-scrollbar-thumb:hover {
            background: rgba(255, 255, 255, 0.25);
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 8px;
        }
        .mt-2 {
            margin-top: 16px;
        }
        .mt-3 {
            margin-top: 24px;
        }
        .mt-4 {
            margin-top: 32px;
        }
        .gap-1 {
            gap: 8px;
        }
        .gap-2 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
    :root {
        --primary: #1a3a5c;
        --primary-light: #2a5a8c;
        --primary-dark: #0f2440;
        --accent: #e8a838;
        --accent-light: #f0c060;
        --accent-dark: #c88a20;
        --bg: #f5f7fa;
        --bg-card: #ffffff;
        --bg-sidebar: #0f1e2f;
        --bg-sidebar-hover: #1a3050;
        --text: #1e2a3a;
        --text-light: #5a6a7a;
        --text-muted: #8a9aaa;
        --border: #e2e6ed;
        --radius: 12px;
        --radius-sm: 8px;
        --radius-lg: 20px;
        --shadow: 0 4px 20px rgba(0,0,0,0.06);
        --shadow-hover: 0 8px 32px rgba(0,0,0,0.10);
        --transition: 0.25s ease;
        --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        --sidebar-width: 240px;
        --header-height: 64px;
    }

    /* ===== 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);
        background: var(--bg);
        color: var(--text);
        line-height: 1.7;
        display: flex;
        min-height: 100vh;
    }
    a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--accent); }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
    ul, ol { list-style: none; }
    button, input, textarea { font-family: inherit; font-size: 1rem; }

    /* ===== 侧边栏 ===== */
    .sidebar {
        position: fixed;
        top: 0; left: 0; bottom: 0;
        width: var(--sidebar-width);
        background: var(--bg-sidebar);
        color: #eef2f7;
        display: flex;
        flex-direction: column;
        z-index: 1000;
        transition: transform var(--transition);
        padding: 0;
    }
    .sidebar-brand {
        padding: 24px 20px 20px;
        border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .sidebar-brand .brand-text {
        font-size: 1.2rem;
        font-weight: 700;
        color: #fff;
        letter-spacing: 0.5px;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .sidebar-brand .brand-text i {
        color: var(--accent);
        font-size: 1.4rem;
    }
    .sidebar-brand .brand-sub {
        font-size: 0.75rem;
        color: rgba(255,255,255,0.4);
        margin-top: 4px;
        letter-spacing: 0.3px;
    }
    .sidebar-nav {
        flex: 1;
        padding: 16px 12px;
        overflow-y: auto;
    }
    .sidebar-nav .nav-label {
        font-size: 0.7rem;
        text-transform: uppercase;
        letter-spacing: 1.2px;
        color: rgba(255,255,255,0.3);
        padding: 8px 12px 6px;
        font-weight: 600;
    }
    .sidebar-nav a {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 10px 14px;
        color: rgba(255,255,255,0.7);
        border-radius: var(--radius-sm);
        font-size: 0.92rem;
        font-weight: 500;
        transition: all var(--transition);
        margin-bottom: 2px;
    }
    .sidebar-nav a i {
        width: 20px;
        text-align: center;
        font-size: 1rem;
        color: rgba(255,255,255,0.4);
        transition: color var(--transition);
    }
    .sidebar-nav a:hover {
        background: var(--bg-sidebar-hover);
        color: #fff;
    }
    .sidebar-nav a:hover i {
        color: var(--accent);
    }
    .sidebar-nav a.active {
        background: rgba(232,168,56,0.15);
        color: var(--accent);
    }
    .sidebar-nav a.active i {
        color: var(--accent);
    }
    .sidebar-footer {
        padding: 16px 20px;
        border-top: 1px solid rgba(255,255,255,0.06);
        font-size: 0.75rem;
        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;
        display: flex;
        flex-direction: column;
    }

    /* ===== 顶部栏 ===== */
    .top-header {
        background: var(--bg-card);
        border-bottom: 1px solid var(--border);
        padding: 0 32px;
        height: var(--header-height);
        display: flex;
        align-items: center;
        justify-content: space-between;
        position: sticky;
        top: 0;
        z-index: 500;
        box-shadow: 0 1px 4px rgba(0,0,0,0.02);
    }
    .top-header .page-title {
        font-size: 1rem;
        font-weight: 600;
        color: var(--text);
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .top-header .page-title i {
        color: var(--accent);
    }
    .top-header .header-actions {
        display: flex;
        align-items: center;
        gap: 16px;
    }
    .top-header .header-actions .search-box {
        display: flex;
        align-items: center;
        background: var(--bg);
        border-radius: 50px;
        padding: 6px 16px;
        border: 1px solid var(--border);
        transition: border-color var(--transition);
    }
    .top-header .header-actions .search-box:focus-within {
        border-color: var(--accent);
    }
    .top-header .header-actions .search-box input {
        border: none;
        background: transparent;
        padding: 4px 8px;
        font-size: 0.85rem;
        outline: none;
        min-width: 160px;
        color: var(--text);
    }
    .top-header .header-actions .search-box input::placeholder {
        color: var(--text-muted);
    }
    .top-header .header-actions .search-box button {
        background: none;
        border: none;
        color: var(--text-muted);
        cursor: pointer;
        transition: color var(--transition);
    }
    .top-header .header-actions .search-box button:hover {
        color: var(--accent);
    }
    .mobile-toggle {
        display: none;
        background: none;
        border: none;
        font-size: 1.3rem;
        color: var(--text);
        cursor: pointer;
        padding: 4px 8px;
    }

    /* ===== 容器 ===== */
    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 32px;
    }

    /* ===== 文章详情 ===== */
    .article-wrapper {
        padding: 40px 0 60px;
        flex: 1;
    }
    .article-header {
        margin-bottom: 32px;
    }
    .article-header .breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 0.85rem;
        color: var(--text-muted);
        margin-bottom: 16px;
        flex-wrap: wrap;
    }
    .article-header .breadcrumb a {
        color: var(--text-muted);
    }
    .article-header .breadcrumb a:hover {
        color: var(--accent);
    }
    .article-header .breadcrumb .sep {
        color: var(--border);
    }
    .article-header .article-category {
        display: inline-block;
        background: rgba(232,168,56,0.12);
        color: var(--accent-dark);
        font-size: 0.78rem;
        font-weight: 600;
        padding: 4px 14px;
        border-radius: 50px;
        margin-bottom: 12px;
        letter-spacing: 0.3px;
    }
    .article-header h1 {
        font-size: 2rem;
        font-weight: 700;
        line-height: 1.35;
        color: var(--primary-dark);
        margin-bottom: 12px;
    }
    .article-header .article-meta {
        display: flex;
        align-items: center;
        gap: 20px;
        font-size: 0.85rem;
        color: var(--text-muted);
        flex-wrap: wrap;
    }
    .article-header .article-meta i {
        margin-right: 4px;
    }
    .article-header .article-meta span {
        display: flex;
        align-items: center;
    }

    .article-cover {
        margin-bottom: 32px;
        border-radius: var(--radius);
        overflow: hidden;
        box-shadow: var(--shadow);
        max-height: 480px;
        object-fit: cover;
        width: 100%;
    }

    .article-body {
        background: var(--bg-card);
        border-radius: var(--radius);
        padding: 40px 44px;
        box-shadow: var(--shadow);
        line-height: 1.9;
        font-size: 1.05rem;
        color: var(--text);
    }
    .article-body h2 {
        font-size: 1.5rem;
        font-weight: 700;
        margin: 32px 0 16px;
        color: var(--primary-dark);
        padding-bottom: 8px;
        border-bottom: 2px solid var(--accent);
        display: inline-block;
    }
    .article-body h3 {
        font-size: 1.2rem;
        font-weight: 600;
        margin: 24px 0 12px;
        color: var(--primary);
    }
    .article-body p {
        margin-bottom: 16px;
    }
    .article-body ul, .article-body ol {
        margin: 12px 0 16px 24px;
    }
    .article-body li {
        margin-bottom: 8px;
        list-style: disc;
    }
    .article-body ol li {
        list-style: decimal;
    }
    .article-body a {
        color: var(--accent-dark);
        text-decoration: underline;
    }
    .article-body a:hover {
        color: var(--primary-light);
    }
    .article-body blockquote {
        border-left: 4px solid var(--accent);
        background: rgba(232,168,56,0.06);
        padding: 16px 24px;
        margin: 20px 0;
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        color: var(--text-light);
        font-style: italic;
    }
    .article-body img {
        margin: 24px auto;
        border-radius: var(--radius-sm);
        box-shadow: var(--shadow);
    }
    .article-body .highlight-box {
        background: rgba(26,58,92,0.04);
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        padding: 20px 24px;
        margin: 20px 0;
    }
    .article-body .highlight-box strong {
        color: var(--primary);
    }

    .article-footer-nav {
        margin-top: 40px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
        padding-top: 24px;
        border-top: 1px solid var(--border);
    }
    .article-footer-nav .btn-back {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 10px 24px;
        background: var(--primary);
        color: #fff;
        border-radius: 50px;
        font-weight: 500;
        font-size: 0.9rem;
        transition: all var(--transition);
    }
    .article-footer-nav .btn-back:hover {
        background: var(--primary-light);
        color: #fff;
        transform: translateX(-2px);
    }
    .article-footer-nav .article-tags {
        display: flex;
        gap: 8px;
        flex-wrap: wrap;
    }
    .article-footer-nav .article-tags .tag {
        background: var(--bg);
        color: var(--text-light);
        padding: 4px 14px;
        border-radius: 50px;
        font-size: 0.8rem;
        border: 1px solid var(--border);
    }

    /* ===== 文章缺失 ===== */
    .not-found-box {
        text-align: center;
        padding: 80px 20px;
        background: var(--bg-card);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
    }
    .not-found-box i {
        font-size: 3rem;
        color: var(--text-muted);
        margin-bottom: 20px;
    }
    .not-found-box h2 {
        font-size: 1.6rem;
        color: var(--text);
        margin-bottom: 12px;
    }
    .not-found-box p {
        color: var(--text-light);
        margin-bottom: 24px;
    }
    .not-found-box .btn-home {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 32px;
        background: var(--accent);
        color: #fff;
        border-radius: 50px;
        font-weight: 600;
        transition: all var(--transition);
    }
    .not-found-box .btn-home:hover {
        background: var(--accent-dark);
        color: #fff;
        transform: translateY(-2px);
    }

    /* ===== 页脚 ===== */
    .footer {
        background: var(--bg-sidebar);
        color: #c8d0dc;
        padding: 48px 0 0;
        margin-top: auto;
    }
    .footer .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 32px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 32px;
        border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .footer-brand .brand-text {
        font-size: 1.2rem;
        font-weight: 700;
        color: #fff;
        margin-bottom: 12px;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .footer-brand .brand-text i {
        color: var(--accent);
    }
    .footer-brand p {
        font-size: 0.88rem;
        line-height: 1.7;
        opacity: 0.7;
    }
    .footer h4 {
        color: #fff;
        font-size: 0.95rem;
        font-weight: 600;
        margin-bottom: 16px;
        letter-spacing: 0.3px;
    }
    .footer ul li {
        margin-bottom: 10px;
    }
    .footer ul li a {
        color: rgba(255,255,255,0.6);
        font-size: 0.88rem;
        transition: all var(--transition);
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .footer ul li a:hover {
        color: var(--accent);
        transform: translateX(3px);
    }
    .footer ul li a i {
        font-size: 0.8rem;
    }
    .footer-bottom {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 20px 0;
        font-size: 0.82rem;
        color: rgba(255,255,255,0.35);
        flex-wrap: wrap;
        gap: 8px;
    }
    .footer-bottom a {
        color: rgba(255,255,255,0.35);
        transition: color var(--transition);
    }
    .footer-bottom a:hover {
        color: var(--accent);
    }

    /* ===== 侧边栏遮罩 ===== */
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0; left: 0; right: 0; bottom: 0;
        background: rgba(0,0,0,0.4);
        z-index: 999;
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
    }

    @media (max-width: 768px) {
        .sidebar {
            transform: translateX(-100%);
        }
        .sidebar.open {
            transform: translateX(0);
        }
        .sidebar-overlay.open {
            display: block;
        }
        .main-content {
            margin-left: 0;
        }
        .mobile-toggle {
            display: block;
        }
        .top-header {
            padding: 0 16px;
        }
        .top-header .header-actions .search-box input {
            min-width: 100px;
        }
        .container {
            padding: 0 16px;
        }
        .article-wrapper {
            padding: 24px 0 40px;
        }
        .article-header h1 {
            font-size: 1.5rem;
        }
        .article-body {
            padding: 24px 20px;
            font-size: 0.98rem;
        }
        .article-body h2 {
            font-size: 1.25rem;
        }
        .article-body h3 {
            font-size: 1.08rem;
        }
        .article-cover {
            max-height: 280px;
        }
        .article-footer-nav {
            flex-direction: column;
            align-items: flex-start;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 28px;
        }
        .footer-bottom {
            flex-direction: column;
            text-align: center;
        }
        .not-found-box {
            padding: 60px 16px;
        }
        .not-found-box h2 {
            font-size: 1.3rem;
        }
    }

    @media (max-width: 520px) {
        .top-header .page-title {
            font-size: 0.85rem;
        }
        .top-header .header-actions .search-box input {
            min-width: 80px;
            font-size: 0.8rem;
        }
        .top-header .header-actions .search-box {
            padding: 4px 12px;
        }
        .article-header .article-meta {
            gap: 12px;
            font-size: 0.78rem;
        }
        .article-body {
            padding: 16px 14px;
        }
        .sidebar-brand .brand-text {
            font-size: 1rem;
        }
    }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3a6b;
            --primary-light: #2a5a9e;
            --primary-dark: #0f2444;
            --accent: #e8b830;
            --accent-light: #f0d060;
            --accent-dark: #c9a020;
            --bg: #f5f7fa;
            --bg-card: #ffffff;
            --bg-dark: #0f1a2e;
            --bg-sidebar: #0f1a2e;
            --text: #1a2332;
            --text-light: #5a6a7e;
            --text-inverse: #f0f2f5;
            --text-muted: #8a9aaa;
            --border: #e2e6ee;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --sidebar-width: 240px;
            --header-h: 0px;
            --max-width: 1280px;
            --gap: 32px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            display: flex;
            min-height: 100vh;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        ul {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--primary-dark);
        }
        h1 {
            font-size: 2.6rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.35rem;
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 1em;
            color: var(--text-light);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--gap);
        }

        /* ===== Sidebar Navigation (App Shell) ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background: var(--bg-sidebar);
            color: var(--text-inverse);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            padding: 28px 18px;
            overflow-y: auto;
            transition: transform var(--transition);
            box-shadow: 2px 0 20px rgba(0, 0, 0, 0.2);
        }
        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 0 6px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            margin-bottom: 20px;
        }
        .sidebar-brand .brand-icon {
            width: 40px;
            height: 40px;
            background: var(--accent);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--primary-dark);
            flex-shrink: 0;
        }
        .sidebar-brand .brand-text {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            letter-spacing: 0.3px;
        }
        .nav-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: rgba(255, 255, 255, 0.35);
            padding: 0 6px;
            margin-bottom: 10px;
            margin-top: 6px;
        }
        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            flex: 1;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition);
            text-decoration: none;
        }
        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 1.05rem;
            flex-shrink: 0;
        }
        .sidebar-nav a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .sidebar-nav a.active {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(232, 184, 48, 0.3);
        }
        .sidebar-nav a.active i {
            color: var(--primary-dark);
        }
        .sidebar-footer {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 16px;
            margin-top: auto;
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.3);
            text-align: center;
        }

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

        /* ===== Hero / Banner ===== */
        .page-hero {
            position: relative;
            padding: 80px 0 72px;
            background: var(--primary-dark);
            color: #fff;
            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.png') center center / cover no-repeat;
            opacity: 0.18;
            pointer-events: none;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 26, 46, 0.92) 0%, rgba(26, 58, 107, 0.70) 100%);
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-hero h1 {
            color: #fff;
            font-size: 2.8rem;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .page-hero h1 i {
            color: var(--accent);
            margin-right: 8px;
        }
        .page-hero p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.15rem;
            max-width: 700px;
            margin: 0 auto 8px;
            line-height: 1.7;
        }
        .hero-badge {
            display: inline-block;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 4px 18px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 18px;
            text-transform: uppercase;
        }

        /* ===== Section Shared ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-card);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-inverse);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark .section-sub {
            color: #fff;
        }
        .section-dark p {
            color: rgba(255, 255, 255, 0.7);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }
        .section-header h2::after {
            content: '';
            display: block;
            width: 56px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 14px auto 0;
        }
        .section-sub {
            color: var(--text-light);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .section-dark .section-sub {
            color: rgba(255, 255, 255, 0.6);
        }

        /* ===== Steps / Process ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 28px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 28px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
            position: relative;
            text-align: center;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent-light);
        }
        .step-card .step-num {
            counter-increment: step;
            width: 48px;
            height: 48px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 700;
            margin: 0 auto 18px;
            box-shadow: 0 4px 12px rgba(26, 58, 107, 0.25);
        }
        .step-card .step-num::before {
            content: counter(step);
        }
        .step-card h4 {
            margin-bottom: 8px;
            color: var(--primary-dark);
        }
        .step-card p {
            font-size: 0.92rem;
            margin-bottom: 0;
        }
        .section-dark .step-card {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.08);
        }
        .section-dark .step-card h4 {
            color: #fff;
        }
        .section-dark .step-card p {
            color: rgba(255, 255, 255, 0.7);
        }
        .section-dark .step-card .step-num {
            background: var(--accent);
            color: var(--primary-dark);
        }

        /* ===== Cards Grid (登录方式) ===== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 28px;
        }
        .icon-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
            text-align: center;
        }
        .icon-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }
        .icon-card .icon-wrap {
            width: 64px;
            height: 64px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.6rem;
            color: #fff;
            box-shadow: 0 6px 18px rgba(26, 58, 107, 0.18);
        }
        .icon-card .icon-wrap.accent {
            background: linear-gradient(135deg, var(--accent-dark), var(--accent));
            color: var(--primary-dark);
        }
        .icon-card .icon-wrap.green {
            background: linear-gradient(135deg, #1a8a5a, #2abf7a);
        }
        .icon-card .icon-wrap.purple {
            background: linear-gradient(135deg, #5a2a8a, #8a4ac8);
        }
        .icon-card h4 {
            margin-bottom: 8px;
            color: var(--primary-dark);
        }
        .icon-card p {
            font-size: 0.9rem;
            margin-bottom: 0;
        }

        /* =安全提示 ===== */
        .safety-tips {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
        }
        .tip-item {
            display: flex;
            gap: 16px;
            background: var(--bg-card);
            padding: 22px 24px;
            border-radius: var(--radius-sm);
            border-left: 4px solid var(--accent);
            box-shadow: var(--shadow-sm);
            align-items: flex-start;
            transition: box-shadow var(--transition);
        }
        .tip-item:hover {
            box-shadow: var(--shadow-md);
        }
        .tip-item .tip-icon {
            font-size: 1.4rem;
            color: var(--accent);
            flex-shrink: 0;
            margin-top: 2px;
        }
        .tip-item h4 {
            font-size: 1rem;
            margin-bottom: 4px;
            color: var(--primary-dark);
        }
        .tip-item p {
            font-size: 0.88rem;
            margin-bottom: 0;
            color: var(--text-light);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--primary-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            transition: background var(--transition);
            user-select: none;
        }
        .faq-question:hover {
            background: rgba(26, 58, 107, 0.03);
        }
        .faq-question i {
            transition: transform var(--transition);
            color: var(--primary-light);
            font-size: 0.85rem;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .section-dark .faq-item {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.08);
        }
        .section-dark .faq-question {
            color: #fff;
        }
        .section-dark .faq-question:hover {
            background: rgba(255, 255, 255, 0.04);
        }
        .section-dark .faq-answer {
            color: rgba(255, 255, 255, 0.7);
        }
        .section-dark .faq-question i {
            color: var(--accent);
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.07;
            pointer-events: none;
        }
        .cta-block h3 {
            color: #fff;
            font-size: 1.8rem;
            margin-bottom: 12px;
        }
        .cta-block p {
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto 24px;
            font-size: 1.05rem;
        }
        .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all var(--transition);
            border: 2px solid transparent;
            text-decoration: none;
            background: transparent;
            color: inherit;
            line-height: 1.2;
        }
        .btn:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 3px;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(232, 184, 48, 0.35);
        }
        .btn-outline {
            border-color: rgba(255, 255, 255, 0.5);
            color: #fff;
            background: transparent;
        }
        .btn-outline:hover {
            border-color: #fff;
            color: #fff;
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }
        .btn-outline-dark {
            border-color: var(--primary);
            color: var(--primary);
        }
        .btn-outline-dark:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-sidebar);
            color: rgba(255, 255, 255, 0.8);
            padding: 48px 0 28px;
            margin-top: auto;
        }
        .footer .container {
            max-width: var(--max-width);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 32px;
        }
        .footer-brand .brand-text {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 0;
            line-height: 1.6;
        }
        .footer h4 {
            color: #fff;
            font-size: 0.95rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer ul li {
            margin-bottom: 10px;
        }
        .footer ul li a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.88rem;
            transition: color var(--transition);
            text-decoration: none;
        }
        .footer ul li a:hover {
            color: var(--accent);
        }
        .footer ul li a i {
            width: 20px;
            margin-right: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.4);
            text-decoration: none;
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        .footer-bottom span {
            display: flex;
            gap: 12px;
            align-items: center;
        }

        /* ===== Mobile Toggle ===== */
        .mobile-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1100;
            background: var(--primary-dark);
            color: #fff;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            border: none;
            font-size: 1.3rem;
            cursor: pointer;
            box-shadow: var(--shadow-md);
            transition: background var(--transition);
            align-items: center;
            justify-content: center;
        }
        .mobile-toggle:hover {
            background: var(--primary);
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
            backdrop-filter: blur(2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .page-hero h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay.open {
                display: block;
            }
            .mobile-toggle {
                display: flex;
            }
            .main-content {
                margin-left: 0;
            }
            .page-hero {
                padding: 56px 0 48px;
                min-height: 240px;
            }
            .page-hero h1 {
                font-size: 1.8rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
            .section {
                padding: 48px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cards-grid {
                grid-template-columns: 1fr 1fr;
            }
            .safety-tips {
                grid-template-columns: 1fr;
            }
            .cta-block {
                padding: 40px 24px;
            }
            .cta-block h3 {
                font-size: 1.4rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
            .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                max-width: 280px;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .cards-grid {
                grid-template-columns: 1fr;
            }
            .page-hero h1 {
                font-size: 1.5rem;
            }
            .hero-badge {
                font-size: 0.7rem;
                padding: 3px 14px;
            }
            .container {
                padding: 0 18px;
            }
            .section {
                padding: 36px 0;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.9rem;
            }
            .faq-answer {
                font-size: 0.88rem;
            }
            .tip-item {
                padding: 16px 18px;
            }
            .icon-card {
                padding: 24px 18px 20px;
            }
            .step-card {
                padding: 24px 18px 20px;
            }
        }

        /* ===== Animations ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeUp 0.6s ease forwards;
        }
        .animate-in-delay-1 {
            animation-delay: 0.1s;
        }
        .animate-in-delay-2 {
            animation-delay: 0.2s;
        }
        .animate-in-delay-3 {
            animation-delay: 0.3s;
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }