/* roulang page: index */
/* ========== 设计变量 ========== */
        :root {
            --primary: #0c1424;
            --primary-light: #1a2744;
            --primary-lighter: #2a3f6f;
            --accent: #f0b429;
            --accent-hover: #d49520;
            --accent-light: #fef3cd;
            --bg: #f5f7fc;
            --bg-card: #ffffff;
            --bg-dark: #0c1424;
            --bg-section-alt: #eef1f8;
            --text: #1a1a2e;
            --text-light: #6b7280;
            --text-white: #f9fafb;
            --border: #e5e7eb;
            --border-light: #f0f2f5;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08);
            --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.12);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ========== Reset ========== */
        *,
        *::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-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover,
        a:focus-visible {
            color: var(--accent-hover);
        }
        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;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
        }
        h2 {
            font-size: clamp(1.5rem, 3.5vw, 2.4rem);
        }
        h3 {
            font-size: clamp(1.15rem, 2vw, 1.5rem);
        }
        p {
            color: var(--text-light);
            margin-bottom: 1rem;
        }

        /* ========== 容器 ========== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: var(--radius-md);
            transition: all var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary);
            border-color: var(--accent);
        }
        .btn-primary:hover,
        .btn-primary:focus-visible {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(240, 180, 41, 0.3);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255, 255, 255, 0.3);
        }
        .btn-outline:hover,
        .btn-outline:focus-visible {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .btn-white {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
        }
        .btn-white:hover,
        .btn-white:focus-visible {
            background: var(--accent);
            border-color: var(--accent);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 255, 255, 0.2);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 1.05rem;
        }
        .btn:active {
            transform: scale(0.97);
        }

        /* ========== 标签 / 徽章 ========== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 14px;
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 50px;
            background: var(--accent-light);
            color: var(--accent-hover);
            border: 1px solid rgba(240, 180, 41, 0.2);
        }
        .badge-primary {
            background: var(--primary-light);
            color: var(--accent);
            border-color: rgba(240, 180, 41, 0.15);
        }
        .badge-sm {
            padding: 2px 10px;
            font-size: 0.7rem;
        }

        /* ========== 卡片 ========== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .card-body {
            padding: 24px;
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        }
        .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .card-text {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.5;
        }

        /* ========== 板块标题 ========== */
        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--text-light);
        }
        .section-header .badge {
            margin-bottom: 16px;
        }
        @media (max-width: 640px) {
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ========== 网格 ========== */
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 520px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ========== 导航 ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(12, 20, 36, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .header-left {
            display: flex;
            align-items: center;
            gap: 40px;
        }
        .logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .logo i {
            color: var(--accent);
            font-size: 1.5rem;
        }
        .logo:hover {
            color: var(--accent);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.75);
            font-weight: 500;
            font-size: 0.92rem;
            transition: all var(--transition);
            position: relative;
        }
        .nav-list a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-list a.active {
            color: var(--accent);
            background: rgba(240, 180, 41, 0.1);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }
        .header-right {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .header-right .btn {
            padding: 8px 20px;
            font-size: 0.88rem;
        }
        .menu-toggle {
            display: none;
            color: #fff;
            font-size: 1.5rem;
            padding: 6px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.06);
        }
        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        /* 移动端导航 */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(12, 20, 36, 0.98);
            backdrop-filter: blur(16px);
            padding: 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            z-index: 999;
            transform: translateY(-120%);
            transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .mobile-nav.open {
            transform: translateY(0);
        }
        .mobile-nav a {
            display: block;
            padding: 12px 16px;
            color: rgba(255, 255, 255, 0.8);
            font-weight: 500;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .mobile-nav a:last-child {
            border-bottom: none;
        }
        .mobile-nav a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
        }
        .mobile-nav a.active {
            color: var(--accent);
            background: rgba(240, 180, 41, 0.08);
        }
        .mobile-nav .btn {
            margin-top: 16px;
            width: 100%;
            justify-content: center;
        }

        @media (max-width: 768px) {
            .nav-list {
                display: none;
            }
            .header-right .btn {
                display: none;
            }
            .menu-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .mobile-nav {
                display: block;
            }
        }

        /* ========== Hero ========== */
        .hero {
            padding-top: var(--header-height);
            min-height: 92vh;
            display: flex;
            align-items: center;
            position: relative;
            background: var(--bg-dark);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(12, 20, 36, 0.92) 40%, rgba(12, 20, 36, 0.6) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            align-items: center;
            gap: 60px;
            padding-top: 40px;
            padding-bottom: 60px;
        }
        .hero-content {
            max-width: 580px;
        }
        .hero-content .badge {
            margin-bottom: 20px;
        }
        .hero-content h1 {
            color: #fff;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
        }
        .hero-content h1 span {
            color: var(--accent);
        }
        .hero-content p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 480px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }
        .hero-visual img {
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-xl);
            max-height: 480px;
            width: 100%;
            object-fit: cover;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-float-badge {
            position: absolute;
            bottom: -16px;
            left: -16px;
            background: var(--accent);
            color: var(--primary);
            padding: 12px 20px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 8px 32px rgba(240, 180, 41, 0.3);
        }
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 40px;
                text-align: center;
            }
            .hero-content {
                max-width: 100%;
            }
            .hero-content p {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-visual img {
                max-height: 360px;
            }
        }
        @media (max-width: 640px) {
            .hero {
                min-height: 80vh;
            }
            .hero .container {
                padding-top: 20px;
                padding-bottom: 40px;
                gap: 28px;
            }
            .hero-content h1 {
                font-size: 1.8rem;
            }
            .hero-content p {
                font-size: 0.95rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                max-width: 300px;
            }
            .hero-visual img {
                max-height: 260px;
            }
            .hero-float-badge {
                bottom: -10px;
                left: -8px;
                padding: 8px 14px;
                font-size: 0.75rem;
            }
        }

        /* ========== 特色板块 ========== */
        .features {
            padding: 80px 0;
            background: var(--bg);
        }
        .feature-card {
            text-align: center;
            padding: 36px 28px;
            border-radius: var(--radius-lg);
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-6px);
        }
        .feature-icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: var(--accent-light);
            color: var(--accent-hover);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin: 0 auto 20px;
            transition: all var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: var(--accent);
            color: var(--primary);
        }
        .feature-card h3 {
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 0.9rem;
            margin-bottom: 0;
        }
        @media (max-width: 640px) {
            .features {
                padding: 48px 0;
            }
            .feature-card {
                padding: 24px 20px;
            }
        }

        /* ========== 分类入口 ========== */
        .categories {
            padding: 80px 0;
            background: var(--bg-section-alt);
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .category-card img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        }
        .category-card .card-body {
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card .card-body .btn {
            margin-top: auto;
            align-self: flex-start;
        }
        .category-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 12px;
            background: var(--accent);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 700;
            border-radius: 50px;
            margin-bottom: 12px;
            align-self: flex-start;
        }
        @media (max-width: 640px) {
            .categories {
                padding: 48px 0;
            }
        }

        /* ========== 最新资讯 ========== */
        .latest-news {
            padding: 80px 0;
            background: var(--bg);
        }
        .news-card {
            display: flex;
            flex-direction: column;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .news-card img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        }
        .news-card .card-body {
            flex: 1;
            display: flex;
            flex-direction: column;
            padding: 20px 24px 24px;
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .news-meta .category-badge {
            padding: 2px 10px;
            background: var(--primary-light);
            color: var(--accent);
            border-radius: 50px;
            font-size: 0.7rem;
            font-weight: 600;
        }
        .news-card .card-title {
            font-size: 1rem;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .card-text {
            font-size: 0.85rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .news-empty {
            text-align: center;
            padding: 60px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--border);
            color: var(--text-light);
        }
        .news-empty i {
            font-size: 2.4rem;
            color: var(--border);
            margin-bottom: 16px;
            display: block;
        }
        @media (max-width: 640px) {
            .latest-news {
                padding: 48px 0;
            }
            .news-card .card-body {
                padding: 16px 18px 20px;
            }
        }

        /* ========== 使用流程 ========== */
        .steps {
            padding: 80px 0;
            background: var(--bg-dark);
            color: #fff;
        }
        .steps .section-header h2 {
            color: #fff;
        }
        .steps .section-header p {
            color: rgba(255, 255, 255, 0.6);
        }
        .steps .section-header .badge {
            background: rgba(240, 180, 41, 0.15);
            color: var(--accent);
            border-color: rgba(240, 180, 41, 0.2);
        }
        .step-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            padding: 32px 20px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: all var(--transition);
            position: relative;
        }
        .step-item:hover {
            background: rgba(255, 255, 255, 0.07);
            transform: translateY(-4px);
        }
        .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary);
            font-size: 1.3rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            position: relative;
        }
        .step-number::after {
            content: '';
            position: absolute;
            inset: -4px;
            border-radius: 50%;
            border: 2px dashed rgba(240, 180, 41, 0.3);
            animation: spin 12s linear infinite;
        }
        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }
        .step-item h3 {
            color: #fff;
            font-size: 1.05rem;
            margin-bottom: 8px;
        }
        .step-item p {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.88rem;
            margin-bottom: 0;
        }
        .step-arrow {
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 1.4rem;
            opacity: 0.5;
        }
        @media (max-width: 1024px) {
            .step-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-arrow {
                display: none;
            }
        }
        @media (max-width: 640px) {
            .steps {
                padding: 48px 0;
            }
            .step-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .step-item {
                padding: 24px 16px;
            }
        }

        /* ========== 数据统计 ========== */
        .stats {
            padding: 70px 0;
            background: var(--bg-card);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .stat-item {
            padding: 20px;
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .stat-number span {
            color: var(--accent);
        }
        .stat-label {
            font-size: 0.95rem;
            color: var(--text-light);
            font-weight: 500;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .stat-number {
                font-size: 2rem;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-number {
                font-size: 1.6rem;
            }
        }

        /* ========== FAQ ========== */
        .faq {
            padding: 80px 0;
            background: var(--bg-section-alt);
        }
        .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-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            cursor: pointer;
            gap: 16px;
            user-select: none;
        }
        .faq-question i {
            color: var(--accent);
            font-size: 1.1rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        @media (max-width: 640px) {
            .faq {
                padding: 48px 0;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-answer {
                padding: 0 16px;
                font-size: 0.85rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
        }

        /* ========== CTA ========== */
        .cta {
            padding: 80px 0;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }
        .cta .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .cta h2 {
            color: #fff;
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
            margin-bottom: 16px;
        }
        .cta p {
            color: rgba(255, 255, 255, 0.65);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta .btn {
            font-size: 1.05rem;
            padding: 16px 40px;
        }
        .cta .btn i {
            font-size: 1.1rem;
        }
        @media (max-width: 640px) {
            .cta {
                padding: 48px 0;
            }
            .cta .btn {
                width: 100%;
                max-width: 320px;
            }
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 48px 0 28px;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 1.2rem;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.5);
            max-width: 320px;
            line-height: 1.6;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.88rem;
            transition: all var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.5);
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary);
            transform: translateY(-3px);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: span 2;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: span 1;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ========== 响应式增强 ========== */
        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ========== 实用工具 ========== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* 焦点轮廓 */
        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* 滚动条美化 */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-light);
        }

        /* 选择文本 */
        ::selection {
            background: var(--accent);
            color: var(--primary);
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a4d8f;
            --primary-light: #2a6ab5;
            --primary-dark: #0f3460;
            --primary-gradient: linear-gradient(135deg, #1a4d8f 0%, #2a6ab5 100%);
            --accent: #f5a623;
            --accent-light: #ffc34d;
            --accent-dark: #d4891a;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --bg-dark: #0f1923;
            --bg-section: #f0f4f9;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-weak: #8a8aaa;
            --text-white: #ffffff;
            --border-color: #e2e8f0;
            --border-radius: 16px;
            --border-radius-sm: 8px;
            --border-radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.10);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
            --shadow-xl: 0 30px 80px rgba(0,0,0,0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
            --spacing-section: 5rem;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-light);
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-light); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--border-radius-sm); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(226,232,240,0.5);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.5px;
        }
        .logo i { color: var(--accent); font-size: 1.6rem; }
        .logo:hover { color: var(--primary-dark); }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-list a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav-list a i { font-size: 0.9rem; opacity: 0.7; }
        .nav-list a:hover {
            color: var(--primary);
            background: rgba(26,77,143,0.06);
        }
        .nav-list a.active {
            color: var(--text-white);
            background: var(--primary-gradient);
            box-shadow: 0 4px 15px rgba(26,77,143,0.25);
        }
        .nav-list a.active i { opacity: 1; }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .nav-toggle:hover { background: rgba(0,0,0,0.05); }

        /* ===== Mobile Nav ===== */
        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            .nav-list {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-md);
                transform: translateY(-110%);
                opacity: 0;
                transition: var(--transition);
                pointer-events: none;
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list a {
                width: 100%;
                padding: 14px 20px;
                border-radius: 12px;
                font-size: 1.05rem;
            }
        }

        /* ===== Article Hero ===== */
        .article-hero {
            margin-top: var(--header-height);
            padding: 5rem 0 3rem;
            background: var(--primary-dark);
            background-image: linear-gradient(135deg, #0f3460 0%, #1a4d8f 60%, #2a6ab5 100%), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
            min-height: 280px;
            display: flex;
            align-items: center;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, rgba(15,52,96,0.3) 0%, rgba(15,52,96,0.7) 100%);
            pointer-events: none;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .article-hero h1 {
            font-size: 2.4rem;
            color: var(--text-white);
            max-width: 800px;
            margin: 0 auto 1rem;
            line-height: 1.35;
            text-shadow: 0 2px 20px rgba(0,0,0,0.2);
        }
        .article-meta {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
            color: rgba(255,255,255,0.85);
            font-size: 0.95rem;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .article-meta i { opacity: 0.7; }
        .article-category {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 50px;
            background: var(--accent);
            color: var(--text-primary);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        /* ===== Article Content ===== */
        .article-section {
            padding: 4rem 0 5rem;
            background: var(--bg-light);
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 3rem;
            align-items: start;
        }
        .article-body {
            background: var(--bg-white);
            border-radius: var(--border-radius);
            padding: 2.5rem 3rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .article-body .content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-secondary);
        }
        .article-body .content h2,
        .article-body .content h3,
        .article-body .content h4 {
            margin-top: 2rem;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }
        .article-body .content h2 { font-size: 1.6rem; }
        .article-body .content h3 { font-size: 1.3rem; }
        .article-body .content p { margin-bottom: 1.2rem; }
        .article-body .content ul,
        .article-body .content ol {
            margin-bottom: 1.2rem;
            padding-left: 1.8rem;
        }
        .article-body .content ul { list-style: disc; }
        .article-body .content ol { list-style: decimal; }
        .article-body .content li { margin-bottom: 0.4rem; }
        .article-body .content img {
            border-radius: var(--border-radius-sm);
            margin: 1.5rem 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body .content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--bg-section);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body .content a { color: var(--primary); text-decoration: underline; }
        .article-body .content a:hover { color: var(--primary-light); }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--border-radius);
            padding: 1.8rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .sidebar-card h3 {
            font-size: 1.15rem;
            margin-bottom: 1.2rem;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-card h3 i { color: var(--accent); }
        .sidebar-list li {
            padding: 0.7rem 0;
            border-bottom: 1px solid rgba(226,232,240,0.5);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .sidebar-list a:hover { color: var(--primary); transform: translateX(4px); }
        .sidebar-list a i { font-size: 0.75rem; color: var(--text-weak); }
        .sidebar-cta {
            background: var(--primary-gradient);
            color: var(--text-white);
            padding: 2rem;
            border-radius: var(--border-radius);
            text-align: center;
        }
        .sidebar-cta h4 { color: var(--text-white); font-size: 1.2rem; margin-bottom: 0.5rem; }
        .sidebar-cta p { color: rgba(255,255,255,0.85); font-size: 0.95rem; margin-bottom: 1.2rem; }
        .sidebar-cta .btn {
            background: var(--accent);
            color: var(--text-primary);
            border: none;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-block;
        }
        .sidebar-cta .btn:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(245,166,35,0.3); }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 4rem 2rem;
            background: var(--bg-white);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .not-found-box i { font-size: 3rem; color: var(--text-weak); margin-bottom: 1.5rem; }
        .not-found-box h2 { font-size: 1.8rem; margin-bottom: 1rem; }
        .not-found-box p { color: var(--text-secondary); margin-bottom: 2rem; }
        .not-found-box .btn-back {
            display: inline-block;
            padding: 14px 36px;
            background: var(--primary-gradient);
            color: var(--text-white);
            border-radius: 50px;
            font-weight: 600;
            box-shadow: 0 8px 25px rgba(26,77,143,0.25);
            transition: var(--transition);
        }
        .not-found-box .btn-back:hover { transform: translateY(-2px); box-shadow: 0 12px 35px rgba(26,77,143,0.3); color: var(--text-white); }

        /* ===== CTA Section ===== */
        .article-cta {
            padding: 4rem 0;
            background: var(--bg-dark);
            background-image: linear-gradient(135deg, #0f1923 0%, #1a2940 100%), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
        }
        .article-cta .container {
            text-align: center;
            max-width: 700px;
        }
        .article-cta h2 { color: var(--text-white); font-size: 2rem; margin-bottom: 1rem; }
        .article-cta p { color: rgba(255,255,255,0.8); font-size: 1.1rem; margin-bottom: 2rem; }
        .article-cta .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .article-cta .btn-primary {
            padding: 16px 40px;
            background: var(--accent);
            color: var(--text-primary);
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 8px 25px rgba(245,166,35,0.3);
        }
        .article-cta .btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 12px 35px rgba(245,166,35,0.4); }
        .article-cta .btn-secondary {
            padding: 16px 40px;
            background: transparent;
            color: var(--text-white);
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.05rem;
            border: 2px solid rgba(255,255,255,0.3);
            cursor: pointer;
            transition: var(--transition);
        }
        .article-cta .btn-secondary:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 4rem 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 3rem;
            padding-bottom: 3rem;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo { color: var(--text-white); margin-bottom: 1rem; font-size: 1.4rem; }
        .footer-brand .logo i { color: var(--accent); }
        .footer-brand p { font-size: 0.95rem; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 360px; }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 1.2rem;
            letter-spacing: 0.5px;
        }
        .footer-col ul li { margin-bottom: 0.7rem; }
        .footer-col ul a {
            color: rgba(255,255,255,0.6);
            font-size: 0.95rem;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-col ul a:hover { color: var(--accent); padding-left: 4px; }
        .footer-col ul a i { width: 18px; opacity: 0.5; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 0;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.4);
            flex-wrap: wrap;
            gap: 1rem;
        }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            color: rgba(255,255,255,0.5);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-social a:hover { background: var(--accent); color: var(--text-primary); transform: translateY(-2px); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
        }
        @media (max-width: 768px) {
            :root { --spacing-section: 3rem; }
            .article-hero h1 { font-size: 1.7rem; }
            .article-body { padding: 1.8rem 1.5rem; }
            .article-sidebar { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .article-meta { flex-direction: column; gap: 12px; }
            .article-cta h2 { font-size: 1.5rem; }
            .article-hero { padding: 3.5rem 0 2rem; min-height: 220px; }
        }
        @media (max-width: 520px) {
            .article-hero h1 { font-size: 1.4rem; }
            .article-body { padding: 1.2rem 1rem; }
            .article-body .content { font-size: 1rem; }
            .container { padding: 0 16px; }
            .article-cta .btn-group { flex-direction: column; align-items: center; }
            .article-cta .btn-primary,
            .article-cta .btn-secondary { width: 100%; max-width: 320px; text-align: center; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }
        .gap-1 { gap: 1rem; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1e40af;
            --primary-light: #dbeafe;
            --primary-gradient: linear-gradient(135deg, #1e3a5f 0%, #2563eb 100%);
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-dark: #0f172a;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.10);
            --shadow-hover: 0 12px 36px rgba(37, 99, 235, 0.10);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            letter-spacing: -0.01em;
        }
        h3 {
            font-size: clamp(1.2rem, 2vw, 1.5rem);
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 0.75rem;
            color: var(--text-light);
        }
        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark h4 {
            color: #fff;
        }
        .section-dark p {
            color: #cbd5e1;
        }
        .section-title {
            text-align: center;
            margin-bottom: 16px;
        }
        .section-subtitle {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px auto;
            font-size: 1.1rem;
            color: var(--text-light);
        }
        .section-dark .section-subtitle {
            color: #94a3b8;
        }
        .badge {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 50px;
            background: var(--primary-light);
            color: var(--primary);
            letter-spacing: 0.3px;
            text-transform: uppercase;
        }
        .badge-accent {
            background: var(--accent-light);
            color: #b45309;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: all var(--transition);
            border: 2px solid transparent;
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
        }
        .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(37, 99, 235, 0.30);
            color: #fff;
        }
        .btn:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
            box-shadow: none;
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.20);
        }
        .btn-accent {
            background: var(--accent);
            color: #1e293b;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.30);
        }
        .btn-accent:hover {
            background: #d97706;
            color: #1e293b;
            box-shadow: 0 8px 28px rgba(245, 158, 11, 0.35);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.9rem;
        }
        .btn-lg {
            padding: 16px 44px;
            font-size: 1.1rem;
        }
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 12px;
        }
        .mt-2 {
            margin-top: 24px;
        }
        .mt-3 {
            margin-top: 40px;
        }
        .mb-1 {
            margin-bottom: 12px;
        }
        .mb-2 {
            margin-bottom: 24px;
        }
        .mb-3 {
            margin-bottom: 40px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: 24px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-between {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .gap-2 {
            gap: 16px;
        }
        .gap-3 {
            gap: 24px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.5px;
        }
        .logo i {
            color: var(--primary);
            font-size: 1.6rem;
        }
        .logo:hover {
            color: var(--primary);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-light);
            transition: all var(--transition);
        }
        .nav-list a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-list a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
        }
        .nav-list a.active i {
            color: #fff;
        }
        .nav-list a i {
            font-size: 0.9rem;
            color: var(--text-light);
            transition: color var(--transition);
        }
        .nav-list a:hover i {
            color: var(--primary);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: background var(--transition);
        }
        .hamburger:hover {
            background: var(--bg-alt);
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.35);
            z-index: 999;
            opacity: 0;
            transition: opacity var(--transition);
        }
        .mobile-nav-overlay.open {
            opacity: 1;
        }

        /* ===== Banner ===== */
        .banner {
            padding-top: calc(var(--header-h) + 20px);
            min-height: 340px;
            display: flex;
            align-items: center;
            background: var(--primary-gradient);
            position: relative;
            overflow: hidden;
        }
        .banner-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.20;
            mix-blend-mode: overlay;
        }
        .banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 60px 24px;
        }
        .banner h1 {
            color: #fff;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
        }
        .banner p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.15rem;
            max-width: 640px;
            margin: 0 auto 24px auto;
        }
        .banner .badge {
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
            backdrop-filter: blur(4px);
            margin-bottom: 20px;
        }

        /* ===== Card ===== */
        .card {
            background: var(--bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 32px 28px;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .card-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 20px;
            transition: background var(--transition), color var(--transition);
        }
        .card:hover .card-icon {
            background: var(--primary);
            color: #fff;
        }
        .card h3 {
            margin-bottom: 10px;
        }
        .card p {
            font-size: 0.95rem;
            margin-bottom: 0;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 16px;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--primary);
        }
        .card-link i {
            transition: transform var(--transition);
        }
        .card-link:hover i {
            transform: translateX(4px);
        }

        /* ===== Steps ===== */
        .step-list {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: 24px;
            counter-reset: step;
        }
        .step-item {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 32px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            text-align: center;
            transition: all var(--transition);
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 700;
            font-size: 1.2rem;
            margin: 0 auto 18px auto;
            transition: all var(--transition);
        }
        .step-item:hover::before {
            background: var(--primary);
            color: #fff;
        }
        .step-item h4 {
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.9rem;
            margin-bottom: 0;
        }

        /* ===== Guide Methods ===== */
        .method-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .method-card {
            display: flex;
            gap: 24px;
            background: var(--bg);
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            align-items: flex-start;
        }
        .method-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .method-card .mc-icon {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            transition: background var(--transition), color var(--transition);
        }
        .method-card:hover .mc-icon {
            background: var(--primary);
            color: #fff;
        }
        .method-card .mc-body h4 {
            margin-bottom: 6px;
        }
        .method-card .mc-body p {
            font-size: 0.92rem;
            margin-bottom: 0;
        }
        .method-card .mc-body .tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 50px;
            background: var(--accent-light);
            color: #b45309;
            margin-top: 8px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            color: var(--text);
            transition: color var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 1.1rem;
            color: var(--text-light);
            transition: transform var(--transition), color var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .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: 320px;
            padding: 0 24px 20px 24px;
        }

        /* ===== CTA ===== */
        .cta-box {
            background: var(--primary-gradient);
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: 0.10;
            mix-blend-mode: overlay;
        }
        .cta-box .container {
            position: relative;
            z-index: 2;
        }
        .cta-box h2 {
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-box p {
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 28px auto;
        }
        .cta-box .btn {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.10);
        }
        .cta-box .btn:hover {
            background: var(--accent);
            color: #1e293b;
            box-shadow: 0 8px 32px rgba(245, 158, 11, 0.30);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: #cbd5e1;
            padding: 60px 0 0 0;
        }
        .site-footer .logo {
            color: #fff;
            margin-bottom: 16px;
        }
        .site-footer .logo i {
            color: var(--accent);
        }
        .site-footer p {
            color: #94a3b8;
            font-size: 0.92rem;
            max-width: 360px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: #94a3b8;
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-col ul li a i {
            margin-right: 8px;
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            font-size: 0.85rem;
            color: #64748b;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-social {
            display: flex;
            gap: 16px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: #94a3b8;
            font-size: 1.1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: 1fr 1fr;
            }
            .step-list {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .nav-list {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: var(--bg);
                flex-direction: column;
                padding: 20px 24px 32px 24px;
                gap: 6px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.10);
                transform: translateY(-110%);
                opacity: 0;
                transition: all 0.35s ease;
                border-bottom: 1px solid var(--border);
                z-index: 998;
                border-radius: 0 0 var(--radius) var(--radius);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-list a {
                width: 100%;
                padding: 12px 20px;
                border-radius: var(--radius-sm);
            }
            .mobile-nav-overlay.open {
                display: block;
            }
            .grid-2,
            .grid-3,
            .grid-4,
            .method-grid {
                grid-template-columns: 1fr;
            }
            .step-list {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .step-item {
                padding: 24px 16px;
            }
            .banner {
                min-height: 280px;
            }
            .banner .container {
                padding: 40px 16px;
            }
            .section {
                padding: 56px 0;
            }
            .cta-box {
                padding: 40px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .method-card {
                flex-direction: column;
                gap: 16px;
            }
            .faq-question {
                font-size: 0.95rem;
                padding: 16px 18px;
            }
        }

        @media (max-width: 520px) {
            .step-list {
                grid-template-columns: 1fr;
            }
            .container {
                padding: 0 16px;
            }
            .banner h1 {
                font-size: 1.8rem;
            }
            .banner p {
                font-size: 0.95rem;
            }
            .card {
                padding: 24px 18px;
            }
            .btn-lg {
                padding: 14px 32px;
                font-size: 1rem;
            }
            .footer-grid {
                gap: 24px;
            }
        }

        /* ===== Utility ===== */
        .img-cover {
            object-fit: cover;
            width: 100%;
            height: 100%;
            border-radius: var(--radius-sm);
        }
        .img-rounded {
            border-radius: var(--radius);
        }
        .divider {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 16px auto 24px auto;
        }
        .divider-light {
            background: rgba(255, 255, 255, 0.30);
        }
        .relative {
            position: relative;
        }
        .z-1 {
            z-index: 1;
        }
        .z-2 {
            z-index: 2;
        }