/* roulang page: index */
:root {
            --primary: #3b82f6;
            --primary-dark: #2563eb;
            --accent: #f59e0b;
            --accent-hover: #d97706;
            --bg: #080e1a;
            --bg-soft: #0c1322;
            --bg-card: #111c30;
            --bg-card-hover: #1a2540;
            --text: #e2e8f0;
            --text-muted: #8fa3bf;
            --border: rgba(148, 163, 184, 0.12);
            --border-hover: rgba(148, 163, 184, 0.28);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 10px 32px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 16px 42px rgba(59, 130, 246, 0.18);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --header-height: 72px;
            --container: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

        ul, ol {
            list-style: none;
        }

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

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

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: 96px 0;
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-block;
            background: rgba(59, 130, 246, 0.12);
            color: var(--primary);
            border: 1px solid rgba(59, 130, 246, 0.25);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            padding: 6px 18px;
            border-radius: 50px;
            margin-bottom: 18px;
            backdrop-filter: blur(4px);
        }

        .section-head h2 {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.5px;
            margin-bottom: 14px;
        }

        .section-head h2 .highlight {
            color: var(--accent);
            position: relative;
        }

        .section-head h2 .highlight::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 4px;
            width: 100%;
            height: 8px;
            background: rgba(245, 158, 11, 0.18);
            border-radius: 4px;
            z-index: -1;
        }

        .section-head p {
            color: var(--text-muted);
            font-size: 16px;
            line-height: 1.7;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(8, 14, 26, 0.88);
            backdrop-filter: blur(20px) saturate(160%);
            -webkit-backdrop-filter: blur(20px) saturate(160%);
            border-bottom: 1px solid var(--border);
            height: var(--header-height);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 32px;
        }

        .logo {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text);
            white-space: nowrap;
        }

        .logo .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), #6366f1);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: #fff;
            font-weight: 900;
            box-shadow: 0 4px 16px rgba(59, 130, 246, 0.35);
        }

        .logo:hover .logo-icon {
            transform: rotate(-6deg) scale(1.05);
        }

        .main-nav {
            display: flex;
            gap: 3px;
            background: rgba(148, 163, 184, 0.08);
            padding: 5px;
            border-radius: 50px;
            border: 1px solid var(--border);
            flex-shrink: 0;
        }

        .main-nav .nav-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            white-space: nowrap;
            transition: var(--transition);
        }

        .main-nav .nav-item i {
            font-size: 13px;
        }

        .main-nav .nav-item:hover {
            background: rgba(148, 163, 184, 0.14);
            color: var(--text);
        }

        .main-nav .nav-item.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4);
        }

        .main-nav .nav-item.active:hover {
            background: var(--primary);
            color: #fff;
        }

        .header-cta {
            flex-shrink: 0;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 14px 28px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.3px;
            transition: var(--transition);
            border: 2px solid transparent;
            line-height: 1.2;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 22px rgba(59, 130, 246, 0.35);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(59, 130, 246, 0.45);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
        }

        .btn-outline {
            border-color: rgba(148, 163, 184, 0.4);
            color: var(--text);
            background: transparent;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(59, 130, 246, 0.08);
            transform: translateY(-2px);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 6px 24px rgba(245, 158, 11, 0.35);
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(245, 158, 11, 0.45);
        }

        .btn-sm {
            padding: 10px 20px;
            font-size: 14px;
            border-radius: 10px;
        }

        .btn:focus-visible,
        .nav-item:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 680px;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            isolation: isolate;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(8, 14, 26, 0.96) 0%, rgba(8, 14, 26, 0.82) 45%, rgba(8, 14, 26, 0.4) 100%);
            z-index: -1;
        }

        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 80% 60%, rgba(59, 130, 246, 0.15), transparent 60%);
            z-index: -1;
        }

        .hero .container {
            padding-top: 40px;
            padding-bottom: 40px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(59, 130, 246, 0.15);
            border: 1px solid rgba(59, 130, 246, 0.3);
            backdrop-filter: blur(8px);
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 500;
            color: #93c5fd;
            margin-bottom: 32px;
        }

        .hero-badge i {
            color: var(--accent);
        }

        .hero h1 {
            font-size: 56px;
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -1px;
            margin-bottom: 20px;
            max-width: 640px;
            background: linear-gradient(135deg, #fff 0%, #dbeafe 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 18px;
            line-height: 1.8;
            color: var(--text-muted);
            max-width: 520px;
            margin-bottom: 40px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 56px;
        }

        .hero-stats {
            display: flex;
            gap: 56px;
            flex-wrap: wrap;
        }

        .stat {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .stat strong {
            font-size: 32px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.2;
        }

        .stat strong span {
            color: var(--accent);
        }

        .stat span {
            font-size: 13px;
            color: var(--text-muted);
            letter-spacing: 0.5px;
        }

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

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }

        .feature-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-hover);
            transform: translateY(-6px);
            box-shadow: var(--shadow);
        }

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

        .feature-icon {
            width: 60px;
            height: 60px;
            background: rgba(59, 130, 246, 0.12);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--primary);
            margin-bottom: 24px;
            transition: var(--transition);
        }

        .feature-card:hover .feature-icon {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05) rotate(-4deg);
        }

        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text);
        }

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

        /* ===== 分类入口 ===== */
        .categories {
            background: var(--bg-soft);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

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

        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: block;
            min-height: 320px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .category-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .category-card::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 20%, rgba(8, 14, 26, 0.9) 100%);
            transition: var(--transition);
        }

        .category-card:hover {
            box-shadow: var(--shadow-hover);
        }

        .category-card:hover img {
            transform: scale(1.08);
        }

        .category-overlay {
            position: absolute;
            left: 28px;
            right: 28px;
            bottom: 28px;
            z-index: 2;
            color: #fff;
        }

        .category-overlay h3 {
            font-size: 26px;
            font-weight: 800;
            margin-bottom: 6px;
        }

        .category-overlay p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 14px;
        }

        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            opacity: 0;
            transform: translateY(8px);
            transition: var(--transition);
        }

        .category-card:hover .category-link {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 新闻列表 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .news-card::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            width: 3px;
            height: 100%;
            background: var(--primary);
            opacity: 0;
            transition: var(--transition);
        }

        .news-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }

        .news-card:hover::before {
            opacity: 1;
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 4px;
        }

        .news-cat {
            display: inline-block;
            background: rgba(59, 130, 246, 0.12);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 50px;
            border: 1px solid rgba(59, 130, 246, 0.2);
        }

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

        .news-card h3 {
            font-size: 20px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text);
        }

        .news-card p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-more {
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 6px;
            transition: var(--transition);
        }

        .news-card:hover .news-more {
            gap: 12px;
            color: var(--accent);
        }

        .empty-tip {
            grid-column: 1 / -1;
            text-align: center;
            color: var(--text-muted);
            font-size: 16px;
            padding: 60px 20px;
            background: var(--bg-card);
            border: 1px dashed var(--border-hover);
            border-radius: var(--radius);
        }

        /* ===== 热门内容 ===== */
        .popular {
            background: var(--bg-soft);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .popular-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .popular-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
            display: block;
        }

        .popular-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
        }

        .popular-cover {
            position: relative;
            height: 180px;
            overflow: hidden;
        }

        .popular-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .popular-card:hover .popular-cover img {
            transform: scale(1.06);
        }

        .popular-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(8, 14, 26, 0.85);
            backdrop-filter: blur(6px);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 50px;
            border: 1px solid rgba(245, 158, 11, 0.3);
        }

        .popular-info {
            padding: 20px;
        }

        .popular-info h3 {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--text);
        }

        .popular-info p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.56;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ===== 流程 ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            position: relative;
        }

        .process-grid::before {
            content: '';
            position: absolute;
            top: 60px;
            left: calc(16.6% + 20px);
            right: calc(16.6% + 20px);
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0.2;
        }

        .process-step {
            text-align: center;
            padding: 40px 24px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            transition: var(--transition);
            position: relative;
            z-index: 1;
        }

        .process-step:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }

        .step-num {
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 40px;
            font-weight: 900;
            color: rgba(148, 163, 184, 0.12);
            line-height: 1;
        }

        .process-step i {
            font-size: 36px;
            color: var(--primary);
            background: rgba(59, 130, 246, 0.12);
            width: 76px;
            height: 76px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            box-shadow: 0 0 0 6px rgba(59, 130, 246, 0.06);
            transition: var(--transition);
        }

        .process-step:nth-child(2) i {
            color: var(--accent);
            background: rgba(245, 158, 11, 0.12);
            box-shadow: 0 0 0 6px rgba(245, 158, 11, 0.06);
        }

        .process-step:nth-child(3) i {
            color: #10b981;
            background: rgba(16, 185, 129, 0.12);
            box-shadow: 0 0 0 6px rgba(16, 185, 129, 0.06);
        }

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

        .process-step p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.65;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

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

        .faq-item.active {
            border-color: rgba(59, 130, 246, 0.4);
            box-shadow: 0 8px 30px rgba(59, 130, 246, 0.1);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            transition: var(--transition);
        }

        .faq-question i {
            color: var(--text-muted);
            transition: transform 0.3s ease;
            font-size: 14px;
            flex-shrink: 0;
        }

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

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .faq-answer p {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
        }

        /* ===== CTA ===== */
        .cta-box {
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(245, 158, 11, 0.1)), var(--bg-card);
            border: 1px solid rgba(59, 130, 246, 0.3);
            border-radius: var(--radius-lg);
            padding: 64px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 180px;
            height: 180px;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.2), transparent 70%);
            border-radius: 50%;
        }

        .cta-box h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 12px;
        }

        .cta-box p {
            color: var(--text-muted);
            font-size: 17px;
            margin-bottom: 32px;
        }

        .cta-box .btn {
            position: relative;
            z-index: 2;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-soft);
            border-top: 1px solid var(--border);
            padding-top: 64px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .footer-brand .footer-logo {
            font-size: 24px;
            font-weight: 800;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 18px;
            color: var(--text);
        }

        .footer-brand .footer-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), #6366f1);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: #fff;
            font-weight: 900;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
            max-width: 300px;
        }

        .footer-links h4,
        .footer-contact h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--text);
        }

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

        .footer-links a {
            color: var(--text-muted);
            font-size: 15px;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--primary);
            padding-left: 6px;
        }

        .footer-contact p {
            color: var(--text-muted);
            font-size: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
        }

        .footer-contact i {
            color: var(--primary);
            font-size: 14px;
            width: 20px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 24px 0;
            text-align: center;
            color: var(--text-dark);
            font-size: 14px;
        }

        .footer-bottom .domain {
            color: var(--text-muted);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .popular-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .hero h1 {
                font-size: 44px;
            }

            .section {
                padding: 72px 0;
            }

            .section-head h2 {
                font-size: 32px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
                gap: 12px;
                padding: 12px 20px;
            }

            .site-header {
                height: auto;
            }

            .main-nav {
                order: 3;
                width: 100%;
                overflow-x: auto;
                justify-content: flex-start;
                border-radius: 12px;
                -webkit-overflow-scrolling: touch;
                scrollbar-width: none;
            }

            .main-nav::-webkit-scrollbar {
                display: none;
            }

            .main-nav .nav-item {
                padding: 7px 14px;
                font-size: 13px;
                flex-shrink: 0;
            }

            .logo {
                font-size: 18px;
            }

            .header-cta {
                margin-left: auto;
            }

            .hero {
                min-height: auto;
                padding: 80px 0;
            }

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

            .hero-desc {
                font-size: 16px;
            }

            .hero-stats {
                gap: 24px;
            }

            .stat strong {
                font-size: 26px;
            }

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

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

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

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

            .process-grid::before {
                display: none;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .section {
                padding: 56px 0;
            }

            .section-head {
                margin-bottom: 40px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .hero h1 {
                font-size: 30px;
            }

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

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

            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }

            .stat {
                flex-direction: row;
                align-items: baseline;
                gap: 10px;
            }

            .cta-box {
                padding: 40px 20px;
            }

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

        @media (prefers-reduced-motion: reduce) {
            * {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
        }

/* roulang page: category1 */
:root {
    --primary: #f97316;
    --primary-rgb: 249, 115, 22;
    --primary-dark: #ea580c;
    --primary-soft: #fff4ec;
    --accent: #fbbf24;
    --dark: #0f172a;
    --dark-2: #1e293b;
    --body-bg: #f6f7fb;
    --surface: #ffffff;
    --text-1: #111827;
    --text-2: #4b5563;
    --text-3: #9ca3af;
    --border: #e5e7eb;
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --shadow-sm: 0 4px 16px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 12px 32px rgba(15, 23, 42, 0.10);
    --shadow-lg: 0 24px 48px rgba(15, 23, 42, 0.15);
    --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
    --transition: all 0.25s ease;
}

*,
*::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);
    background: var(--body-bg);
    color: var(--text-1);
    line-height: 1.7;
    font-size: 16px;
}

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

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

ul,
ol {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 88px 0;
}

.section-head {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 52px;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 999px;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.section-head h2 {
    font-size: clamp(26px, 3.4vw, 36px);
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: -0.5px;
}

.section-head p {
    color: var(--text-2);
    font-size: 16px;
    margin-top: 14px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    padding: 12px 24px;
    border-radius: 999px;
    transition: var(--transition);
    line-height: 1;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, #fb923c 100%);
    color: #fff;
    box-shadow: 0 8px 20px rgba(var(--primary-rgb), 0.28);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 28px rgba(var(--primary-rgb), 0.36);
    color: #fff;
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 6px 16px rgba(var(--primary-rgb), 0.24);
}

.btn-ghost-light {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.32);
    backdrop-filter: blur(6px);
}

.btn-ghost-light:hover {
    background: rgba(255, 255, 255, 0.22);
    border-color: rgba(255, 255, 255, 0.55);
    color: #fff;
    transform: translateY(-2px);
}

.btn-sm {
    padding: 10px 18px;
    font-size: 14px;
}

.btn-light {
    background: #fff;
    color: var(--dark);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.btn-light:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 32px rgba(0, 0, 0, 0.18);
    color: var(--primary);
}

.btn-outline-light {
    background: transparent;
    color: #fff;
    border: 1.5px solid rgba(255, 255, 255, 0.6);
}

.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.14);
    border-color: #fff;
    color: #fff;
    transform: translateY(-2px);
}

.btn:focus-visible {
    outline: 3px solid rgba(var(--primary-rgb), 0.4);
    outline-offset: 2px;
}

/* ============ Header ============ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(229, 231, 235, 0.8);
}

.header-inner {
    display: flex;
    align-items: center;
    gap: 20px;
    height: 72px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 21px;
    font-weight: 800;
    color: var(--text-1);
    letter-spacing: -0.3px;
    flex-shrink: 0;
}

.logo-icon {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, #fb923c 100%);
    color: #fff;
    border-radius: 11px;
    font-weight: 900;
    font-size: 19px;
    box-shadow: 0 6px 14px rgba(var(--primary-rgb), 0.3);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: 20px;
}

.nav-item {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 18px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-2);
    transition: var(--transition);
    white-space: nowrap;
}

.nav-item i {
    font-size: 13px;
    opacity: 0.9;
}

.nav-item:hover {
    color: var(--primary);
    background: var(--primary-soft);
}

.nav-item.active {
    background: var(--primary);
    color: #fff;
    font-weight: 600;
    box-shadow: 0 6px 16px rgba(var(--primary-rgb), 0.26);
}

.nav-item:focus-visible {
    outline: 3px solid rgba(var(--primary-rgb), 0.4);
    outline-offset: 2px;
}

.header-cta {
    margin-left: auto;
}

.nav-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 18px;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.nav-toggle:hover {
    background: var(--primary);
    color: #fff;
}

/* ============ Page Banner ============ */
.page-banner {
    position: relative;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.94), rgba(30, 41, 59, 0.82)), url('/assets/images/backpic/back-2.png') center / cover no-repeat;
    color: #fff;
    padding: 100px 0 96px;
    overflow: hidden;
}

.banner-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 760px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 28px;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.85);
    transition: var(--transition);
}

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

.breadcrumb i {
    font-size: 11px;
}

.banner-badges {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 22px;
}

.banner-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 999px;
    padding: 6px 16px;
    font-size: 13px;
    font-weight: 500;
    backdrop-filter: blur(6px);
}

.banner-badge i {
    color: var(--accent);
}

.banner-content h1 {
    font-size: clamp(32px, 5vw, 52px);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -1px;
    margin-bottom: 18px;
}

.banner-content > p {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.82);
    max-width: 600px;
    margin: 0 auto 34px;
    line-height: 1.8;
}

.banner-actions {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
}

/* ============ Features ============ */
.features-section {
    background: var(--body-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 36px 30px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    opacity: 0;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(var(--primary-rgb), 0.3);
}

.feature-card:hover::after {
    opacity: 1;
}

.feature-icon {
    width: 58px;
    height: 58px;
    border-radius: 16px;
    background: var(--primary-soft);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 20px;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    background: var(--primary);
    color: #fff;
    transform: scale(1.06);
}

.feature-card h3 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--text-2);
    font-size: 15px;
    line-height: 1.75;
}

/* ============ Modules ============ */
.modules-section {
    background: var(--surface);
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.module-card {
    background: var(--body-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    display: flex;
    gap: 18px;
    align-items: flex-start;
    transition: var(--transition);
}

.module-card:hover {
    background: var(--primary-soft);
    border-color: rgba(var(--primary-rgb), 0.35);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.module-icon {
    width: 46px;
    height: 46px;
    border-radius: 13px;
    background: var(--surface);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 19px;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.module-card:hover .module-icon {
    background: var(--primary);
    color: #fff;
}

.module-card h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 6px;
}

.module-card p {
    color: var(--text-2);
    font-size: 14px;
    line-height: 1.7;
}

/* ============ Stats Band ============ */
.stats-band {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    padding: 72px 0;
    position: relative;
    overflow: hidden;
}

.stats-band::before {
    content: '';
    position: absolute;
    top: -60px;
    right: -60px;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(var(--primary-rgb), 0.22), transparent 70%);
}

.stats-band::after {
    content: '';
    position: absolute;
    bottom: -80px;
    left: -40px;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(251, 191, 36, 0.14), transparent 70%);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    position: relative;
    z-index: 1;
}

.stat-item {
    text-align: center;
    color: #fff;
    padding: 20px 12px;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.stat-item:hover {
    background: rgba(255, 255, 255, 0.04);
}

.stat-num {
    display: block;
    font-size: clamp(30px, 3.5vw, 44px);
    font-weight: 800;
    line-height: 1.1;
    background: linear-gradient(135deg, #fff 30%, var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
}

.stat-suffix {
    font-size: 0.6em;
    font-weight: 700;
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.64);
    letter-spacing: 0.5px;
}

/* ============ Steps ============ */
.steps-section {
    background: var(--body-bg);
}

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

.step-item {
    text-align: center;
    padding: 32px 20px;
    background: var(--surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    position: relative;
    transition: var(--transition);
}

.step-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(var(--primary-rgb), 0.28);
}

.step-dot {
    width: 64px;
    height: 64px;
    margin: 0 auto 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), #fb923c);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 800;
    box-shadow: 0 10px 24px rgba(var(--primary-rgb), 0.3);
    position: relative;
    z-index: 1;
}

.step-item h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
}

.step-item p {
    color: var(--text-2);
    font-size: 14px;
    line-height: 1.7;
}

/* ============ Content Cards ============ */
.guide-section {
    background: var(--surface);
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.content-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.content-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.card-media {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 9;
}

.card-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.content-card:hover .card-media img {
    transform: scale(1.06);
}

.card-badge {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(15, 23, 42, 0.78);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 5px 12px;
    border-radius: 999px;
    backdrop-filter: blur(8px);
    letter-spacing: 0.3px;
}

.card-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.card-meta {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--text-3);
    margin-bottom: 10px;
}

.card-meta span {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.card-body h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.4;
}

.card-body p {
    color: var(--text-2);
    font-size: 14px;
    line-height: 1.75;
    flex: 1;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 18px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
}

.card-link i {
    transition: transform 0.25s ease;
}

.card-link:hover {
    color: var(--primary-dark);
}

.card-link:hover i {
    transform: translateX(4px);
}

/* ============ FAQ ============ */
.faq-section {
    background: var(--body-bg);
}

.faq-wrap {
    max-width: 820px;
    margin: 0 auto;
}

.faq-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item.open {
    border-color: rgba(var(--primary-rgb), 0.35);
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-1);
    text-align: left;
    transition: var(--transition);
}

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

.faq-question i {
    font-size: 15px;
    color: var(--text-3);
    transition: transform 0.3s ease, color 0.3s ease;
    flex-shrink: 0;
}

.faq-item.open .faq-question i {
    transform: rotate(45deg);
    color: var(--primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
}

.faq-answer-inner {
    padding: 0 24px 22px;
    color: var(--text-2);
    font-size: 15px;
    line-height: 1.8;
    border-top: 1px dashed var(--border);
    padding-top: 16px;
    margin-top: -4px;
}

.faq-item.open .faq-answer {
    max-height: 320px;
}

/* ============ CTA ============ */
.cta-section {
    padding: 80px 0;
    background: var(--surface);
}

.cta-box {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    border-radius: 28px;
    padding: 56px 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    flex-wrap: wrap;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.cta-box::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 380px;
    height: 380px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(var(--primary-rgb), 0.24), transparent 70%);
}

.cta-content {
    position: relative;
    z-index: 1;
    color: #fff;
}

.cta-content h2 {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 800;
    margin-bottom: 8px;
}

.cta-content p {
    color: rgba(255, 255, 255, 0.76);
    font-size: 16px;
}

.cta-actions {
    position: relative;
    z-index: 1;
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

/* ============ Footer ============ */
.site-footer {
    background: #0b1120;
    color: rgba(255, 255, 255, 0.7);
    padding: 64px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 44px;
}

.footer-brand .footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    max-width: 340px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-links h4,
.footer-contact h4 {
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 18px;
}

.footer-links ul li {
    margin-bottom: 12px;
}

.footer-links ul li a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.62);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.footer-links ul li a::before {
    content: '›';
    color: var(--primary);
    font-weight: 700;
    transition: transform 0.25s ease;
}

.footer-links ul li a:hover {
    color: #fff;
}

.footer-links ul li a:hover::before {
    transform: translateX(3px);
}

.footer-contact p {
    font-size: 14px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.62);
}

.footer-contact p i {
    color: var(--primary);
    width: 18px;
    text-align: center;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 24px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom .domain {
    color: rgba(255, 255, 255, 0.65);
}

/* ============ Responsive ============ */
@media (max-width: 1024px) {
    .header-inner {
        gap: 12px;
    }

    .main-nav {
        gap: 2px;
        margin-left: 8px;
    }

    .nav-item {
        padding: 9px 14px;
        font-size: 14px;
    }

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

    .steps-wrap {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .stats-grid {
        gap: 16px;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 64px 0;
    }

    .header-inner {
        height: 64px;
    }

    .main-nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        background: #fff;
        padding: 14px 20px 20px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
        margin: 0;
        gap: 6px;
    }

    .main-nav.open {
        display: flex;
    }

    .nav-item {
        padding: 13px 16px;
        border-radius: 12px;
        justify-content: flex-start;
        font-size: 15px;
    }

    .nav-toggle {
        display: inline-flex;
        margin-left: auto;
    }

    .header-cta {
        display: none;
    }

    .page-banner {
        padding: 72px 0 68px;
    }

    .banner-actions {
        flex-direction: column;
        align-items: center;
    }

    .banner-actions .btn {
        width: 100%;
        max-width: 300px;
    }

    .features-grid,
    .modules-grid,
    .guide-grid {
        grid-template-columns: 1fr;
    }

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

    .steps-wrap {
        grid-template-columns: 1fr;
    }

    .cta-box {
        padding: 40px 28px;
        flex-direction: column;
        text-align: center;
    }

    .cta-actions {
        justify-content: center;
    }

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

@media (max-width: 520px) {
    .container {
        padding: 0 16px;
    }

    .logo {
        font-size: 18px;
    }

    .logo-icon {
        width: 34px;
        height: 34px;
        font-size: 17px;
    }

    .section-head {
        margin-bottom: 36px;
    }

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

    .stat-num {
        font-size: 30px;
    }

    .stat-label {
        font-size: 13px;
    }

    .cta-actions .btn {
        width: 100%;
    }

    .footer-bottom {
        font-size: 12px;
    }
}

/* roulang page: category2 */
/* ========== 设计变量 ========== */
        :root {
            --bg-primary: #0b1020;
            --bg-secondary: #0e1528;
            --bg-card: #131c33;
            --bg-elevated: #182341;
            --bg-input: #0d1428;
            --accent: #d4a853;
            --accent-light: #e8c97a;
            --accent-dark: #b8913a;
            --accent-rgb: 212, 168, 83;
            --text-primary: #eef2f7;
            --text-secondary: #a7b4c6;
            --text-muted: #6b7a8f;
            --border: rgba(148, 163, 184, 0.14);
            --border-light: rgba(148, 163, 184, 0.22);
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 18px 56px rgba(0, 0, 0, 0.48);
            --shadow-accent: 0 8px 30px rgba(212, 168, 83, 0.18);
            --transition: all 0.3s ease;
            --max-width: 1200px;
            --section-gap: 110px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        input,
        textarea,
        select {
            font-family: inherit;
            font-size: 1rem;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        ::selection {
            background: rgba(var(--accent-rgb), 0.25);
            color: #fff;
        }

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

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 13px 32px;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 0.95rem;
            line-height: 1.4;
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn i {
            font-size: 0.9em;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
            color: #0b1020;
            box-shadow: var(--shadow-accent);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 36px rgba(212, 168, 83, 0.3);
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
        }

        .btn-outline {
            border: 1px solid var(--border-light);
            color: var(--text-primary);
            background: transparent;
        }

        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent-light);
            background: rgba(var(--accent-rgb), 0.06);
            transform: translateY(-2px);
        }

        .btn-lg {
            padding: 16px 42px;
            font-size: 1.05rem;
            border-radius: var(--radius-lg);
        }

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

        /* ========== 标签 / 徽章 ========== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: 999px;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            background: rgba(var(--accent-rgb), 0.12);
            color: var(--accent-light);
            border: 1px solid rgba(var(--accent-rgb), 0.22);
        }

        .badge i {
            font-size: 0.75rem;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 14px;
        }

        .section-tag::before {
            content: "";
            width: 22px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            display: block;
        }

        /* ========== 导航 Header ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 16, 32, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(148, 163, 184, 0.08);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.25);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: 76px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            flex-shrink: 0;
        }

        .logo:hover {
            color: var(--accent-light);
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--accent-light), var(--accent-dark));
            color: #0b1020;
            font-size: 1.3rem;
            font-weight: 800;
            border-radius: 12px;
            box-shadow: var(--shadow-accent);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(148, 163, 184, 0.08);
            border-radius: 999px;
            padding: 5px;
        }

        .nav-item {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 9px 20px;
            border-radius: 999px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-item i {
            font-size: 0.85rem;
        }

        .nav-item:hover {
            color: var(--accent-light);
            background: rgba(var(--accent-rgb), 0.08);
        }

        .nav-item.active {
            color: #0b1020;
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
            font-weight: 600;
            box-shadow: 0 4px 18px rgba(var(--accent-rgb), 0.25);
        }

        .header-cta {
            flex-shrink: 0;
        }

        /* ========== Hero ========== */
        .page-hero {
            position: relative;
            padding: 108px 0 100px;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            isolation: isolate;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(115deg, rgba(11, 16, 32, 0.96) 0%, rgba(11, 16, 32, 0.82) 55%, rgba(11, 16, 32, 0.65) 100%);
            z-index: -1;
        }

        .page-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 80% 30%, rgba(var(--accent-rgb), 0.1) 0%, transparent 60%);
            z-index: -1;
        }

        .hero-content {
            max-width: 820px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 7px 18px;
            border-radius: 999px;
            background: rgba(var(--accent-rgb), 0.12);
            border: 1px solid rgba(var(--accent-rgb), 0.28);
            color: var(--accent-light);
            font-size: 0.82rem;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .hero-content h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
        }

        .hero-content h1 span {
            color: var(--accent);
        }

        .hero-desc {
            font-size: 1.12rem;
            color: var(--text-secondary);
            max-width: 620px;
            margin-bottom: 34px;
            line-height: 1.8;
        }

        .hero-search {
            display: flex;
            max-width: 540px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 6px;
            backdrop-filter: blur(6px);
        }

        .hero-search input {
            flex: 1;
            background: transparent;
            padding: 12px 20px;
            color: var(--text-primary);
            font-size: 0.95rem;
            border-radius: var(--radius);
        }

        .hero-search input::placeholder {
            color: var(--text-muted);
        }

        .hero-search button {
            padding: 12px 28px;
            border-radius: var(--radius);
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
            color: #0b1020;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .hero-search button:hover {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            transform: translateX(-2px);
        }

        .hero-meta {
            display: flex;
            gap: 24px;
            margin-top: 30px;
            flex-wrap: wrap;
        }

        .hero-meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .hero-meta-item i {
            color: var(--accent);
            font-size: 0.9rem;
        }

        /* ========== 通用 Section ========== */
        .section {
            padding: var(--section-gap) 0;
        }

        .section-alt {
            background: var(--bg-secondary);
            position: relative;
        }

        .section-head {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 58px;
        }

        .section-head h2 {
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .section-head p {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.7;
        }

        /* ========== 帮助分类卡片 ========== */
        .cats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .cat-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
            position: relative;
        }

        .cat-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(var(--accent-rgb), 0.25);
        }

        .cat-card-cover {
            position: relative;
            height: 170px;
            overflow: hidden;
        }

        .cat-card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .cat-card:hover .cat-card-cover img {
            transform: scale(1.07);
        }

        .cat-card-cover::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 30%, rgba(11, 16, 32, 0.85) 100%);
        }

        .cat-card-icon {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(11, 16, 32, 0.82);
            border: 1px solid rgba(var(--accent-rgb), 0.3);
            border-radius: 12px;
            color: var(--accent);
            font-size: 1.1rem;
            backdrop-filter: blur(4px);
        }

        .cat-card-body {
            padding: 24px;
            position: relative;
            z-index: 2;
            margin-top: -10px;
        }

        .cat-card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .cat-card-body p {
            font-size: 0.87rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 16px;
        }

        .cat-card-link {
            font-size: 0.86rem;
            font-weight: 600;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .cat-card-link i {
            transition: transform 0.3s ease;
        }

        .cat-card-link:hover i {
            transform: translateX(4px);
        }

        /* ========== 热门问题区 ========== */
        .hot-wrap {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 32px;
            align-items: stretch;
        }

        .hot-left {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .hot-item {
            display: flex;
            align-items: flex-start;
            gap: 18px;
            padding: 24px 28px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            transition: var(--transition);
        }

        .hot-item:hover {
            border-color: rgba(var(--accent-rgb), 0.3);
            background: var(--bg-elevated);
            transform: translateX(6px);
        }

        .hot-num {
            font-size: 1.5rem;
            font-weight: 800;
            color: rgba(var(--accent-rgb), 0.6);
            min-width: 42px;
            line-height: 1;
            font-style: italic;
        }

        .hot-item-body {
            flex: 1;
        }

        .hot-item-body h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .hot-item-body p {
            font-size: 0.86rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .hot-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 3px 10px;
            border-radius: 999px;
            background: rgba(var(--accent-rgb), 0.08);
            border: 1px solid rgba(var(--accent-rgb), 0.2);
            color: var(--accent-light);
            font-size: 0.72rem;
            font-weight: 500;
            white-space: nowrap;
            margin-top: 8px;
        }

        .hot-right {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .media-card {
            position: relative;
            flex: 1;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 230px;
            border: 1px solid var(--border);
        }

        .media-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
        }

        .media-card::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 20%, rgba(11, 16, 32, 0.88) 100%);
        }

        .media-card-content {
            position: absolute;
            bottom: 20px;
            left: 22px;
            right: 22px;
            z-index: 2;
        }

        .media-card-content h4 {
            font-size: 1.08rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .media-card-content p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 10px;
        }

        .media-card-content .btn {
            padding: 7px 18px;
            font-size: 0.8rem;
            border-radius: var(--radius-sm);
        }

        /* ========== 步骤指南 ========== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
            counter-reset: step;
        }

        .steps-grid::before {
            content: "";
            position: absolute;
            top: 50px;
            left: 8%;
            right: 8%;
            height: 1px;
            background: var(--border);
            z-index: 0;
        }

        .step-card {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 0 14px;
        }

        .step-dot {
            width: 100px;
            height: 100px;
            margin: 0 auto 22px;
            border-radius: 28px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            color: var(--accent);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .step-card:hover .step-dot {
            background: var(--bg-elevated);
            border-color: rgba(var(--accent-rgb), 0.35);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .step-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .step-card p {
            font-size: 0.86rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        .step-num-label {
            position: absolute;
            top: -6px;
            left: 50%;
            transform: translateX(-50%);
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-light), var(--accent-dark));
            color: #0b1020;
            border-radius: 999px;
            box-shadow: 0 4px 14px rgba(var(--accent-rgb), 0.3);
        }

        /* ========== 热门排行 ========== */
        .rank-wrap {
            max-width: 820px;
            margin: 0 auto;
        }

        .rank-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .rank-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 20px 26px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .rank-item::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: linear-gradient(180deg, var(--accent-light), var(--accent-dark));
            opacity: 0;
            transition: var(--transition);
        }

        .rank-item:hover {
            border-color: rgba(var(--accent-rgb), 0.3);
            transform: translateX(8px);
            box-shadow: var(--shadow);
        }

        .rank-item:hover::before {
            opacity: 1;
        }

        .rank-no {
            font-size: 1.6rem;
            font-weight: 800;
            min-width: 56px;
            text-align: center;
            line-height: 1;
            font-style: italic;
            background: linear-gradient(135deg, var(--accent-light), var(--accent-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .rank-body {
            flex: 1;
        }

        .rank-body h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .rank-body p {
            font-size: 0.84rem;
            color: var(--text-secondary);
        }

        .rank-meta {
            display: flex;
            gap: 14px;
            font-size: 0.78rem;
            color: var(--text-muted);
            flex-shrink: 0;
        }

        .rank-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .rank-meta i {
            color: var(--accent);
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

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

        .faq-item:hover {
            border-color: rgba(var(--accent-rgb), 0.25);
        }

        .faq-item.open {
            border-color: rgba(var(--accent-rgb), 0.4);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 22px 26px;
            text-align: left;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            transition: var(--transition);
            background: transparent;
        }

        .faq-question:hover {
            color: var(--accent-light);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 999px;
            background: rgba(var(--accent-rgb), 0.1);
            color: var(--accent);
            font-size: 0.8rem;
            transition: var(--transition);
        }

        .faq-item.open .faq-icon {
            background: var(--accent);
            color: #0b1020;
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-answer-inner {
            padding: 0 26px 24px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ========== CTA ========== */
        .cta-section {
            position: relative;
            padding: 80px 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            isolation: isolate;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(11, 16, 32, 0.96) 0%, rgba(11, 16, 32, 0.9) 100%);
            z-index: -1;
        }

        .cta-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
        }

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

        .cta-text h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-text p {
            color: var(--text-secondary);
            font-size: 0.98rem;
            line-height: 1.7;
            max-width: 520px;
        }

        .cta-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border);
            padding: 64px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.25rem;
            font-weight: 800;
            margin-bottom: 18px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-links h4,
        .footer-contact h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--text-primary);
        }

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

        .footer-links a {
            font-size: 0.88rem;
            color: var(--text-secondary);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-contact p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact i {
            color: var(--accent);
            width: 18px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 22px 0;
            text-align: center;
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .footer-bottom .domain {
            color: var(--text-secondary);
        }

        /* ========== 移动端汉堡菜单 ========== */
        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border: 1px solid var(--border);
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-primary);
            font-size: 1.1rem;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }

        .nav-toggle:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .cats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .hot-wrap {
                grid-template-columns: 1fr;
            }

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }

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

            .hero-content h1 {
                font-size: 2.6rem;
            }

            .rank-meta {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
            }

            .main-nav {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--bg-primary);
                border-radius: 0;
                border: none;
                border-bottom: 1px solid var(--border);
                padding: 12px 20px;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
            }

            .main-nav.open {
                display: flex;
            }

            .nav-item {
                border-radius: var(--radius);
                padding: 14px 20px;
                font-size: 0.95rem;
            }

            .nav-toggle {
                display: flex;
            }

            .header-cta {
                display: none;
            }

            .page-hero {
                padding: 76px 0 72px;
                background-attachment: scroll;
            }

            .hero-content h1 {
                font-size: 2rem;
            }

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

            .section {
                padding: 64px 0;
            }

            .section-gap {
                --section-gap: 64px;
            }

            .section-head h2 {
                font-size: 1.7rem;
            }

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

            .steps-grid {
                grid-template-columns: 1fr;
                max-width: 360px;
                margin: 0 auto;
            }

            .rank-item {
                padding: 16px 18px;
                gap: 12px;
            }

            .rank-no {
                min-width: 36px;
                font-size: 1.3rem;
            }

            .cta-content {
                flex-direction: column;
                align-items: flex-start;
            }

            .cta-actions {
                width: 100%;
            }

            .cta-actions .btn {
                flex: 1;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 18px;
            }

            .hero-content h1 {
                font-size: 1.7rem;
            }

            .hero-search {
                flex-direction: column;
                gap: 8px;
                background: transparent;
                border: none;
                padding: 0;
            }

            .hero-search input {
                background: rgba(255, 255, 255, 0.06);
                border: 1px solid var(--border);
                border-radius: var(--radius);
            }

            .hero-search button {
                width: 100%;
                border-radius: var(--radius);
            }

            .hot-item {
                flex-direction: column;
                gap: 10px;
                padding: 20px;
            }

            .hot-num {
                min-width: 0;
            }

            .rank-item {
                flex-wrap: wrap;
            }

            .btn-lg {
                padding: 14px 28px;
                font-size: 0.95rem;
            }

            .faq-question {
                padding: 18px 16px;
                font-size: 0.92rem;
            }

            .faq-answer-inner {
                padding: 0 16px 20px;
            }
        }

/* roulang page: article */
:root {
    --primary: #4655F6;
    --primary-dark: #2F3CC8;
    --primary-light: #ECEFFF;
    --accent: #FF6B3D;
    --accent-dark: #E85228;
    --ink: #101830;
    --ink-2: #1A2440;
    --paper: #F5F7FC;
    --surface: #FFFFFF;
    --text-main: #161C32;
    --text-soft: #5C6484;
    --text-faint: #8A92AD;
    --border: #E2E6F1;
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
    --shadow-sm: 0 4px 16px rgba(16, 24, 48, 0.06);
    --shadow-md: 0 12px 32px rgba(16, 24, 48, 0.10);
    --shadow-lg: 0 24px 64px rgba(16, 24, 48, 0.16);
    --font-main: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
}
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: var(--font-main);
    background: var(--paper);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
img {
    max-width: 100%;
    display: block;
}
a {
    color: inherit;
    text-decoration: none;
    transition: color 0.25s var(--ease);
}
button, input, summary {
    font-family: inherit;
    border: none;
    background: none;
    outline: none;
}
ul, ol {
    list-style: none;
}
::selection {
    background: rgba(70, 85, 246, 0.18);
}
a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible {
    outline: 3px solid rgba(70, 85, 246, 0.35);
    outline-offset: 2px;
}
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 999px;
    padding: 14px 28px;
    font-size: 15px;
    font-weight: 600;
    line-height: 1;
    cursor: pointer;
    transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease);
    letter-spacing: 0.01em;
}
.btn-sm {
    padding: 10px 20px;
    font-size: 13px;
}
.btn-lg {
    padding: 16px 34px;
    font-size: 16px;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 8px 24px rgba(70, 85, 246, 0.30);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(70, 85, 246, 0.38);
}
.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 6px 18px rgba(70, 85, 246, 0.26);
}
.btn-accent {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: #fff;
    box-shadow: 0 8px 24px rgba(255, 107, 61, 0.30);
}
.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(255, 107, 61, 0.36);
}
.btn-accent:active {
    transform: translateY(0);
    box-shadow: 0 6px 18px rgba(255, 107, 61, 0.26);
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 200;
    background: rgba(9, 13, 28, 0.82);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 24px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.02em;
    white-space: nowrap;
}
.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 12px;
    background: linear-gradient(135deg, #4655F6, #FF6B3D);
    color: #fff;
    font-size: 20px;
    font-weight: 800;
    box-shadow: 0 6px 16px rgba(70, 85, 246, 0.35);
    flex-shrink: 0;
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
}
.nav-item {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 18px;
    border-radius: 999px;
    color: rgba(255, 255, 255, 0.72);
    font-size: 15px;
    font-weight: 500;
    transition: all 0.28s var(--ease);
}
.nav-item i {
    font-size: 14px;
    opacity: 0.85;
}
.nav-item:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
}
.nav-item.active {
    color: #fff;
    background: linear-gradient(135deg, rgba(70, 85, 246, 0.25), rgba(255, 107, 61, 0.18));
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
}

.article-banner {
    position: relative;
    min-height: 360px;
    display: flex;
    align-items: center;
    background-color: var(--ink);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    padding: 72px 0 108px;
    overflow: hidden;
}
.article-banner::before {
    content: "";
    position: absolute;
    width: 520px;
    height: 520px;
    right: -120px;
    top: -120px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 107, 61, 0.22), transparent 62%);
    z-index: 0;
    pointer-events: none;
}
.banner-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(100deg, rgba(9, 13, 28, 0.92) 0%, rgba(16, 24, 48, 0.78) 60%, rgba(70, 85, 246, 0.45) 100%);
    z-index: 1;
}
.banner-content {
    position: relative;
    z-index: 2;
    max-width: 920px;
}
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
    color: rgba(255, 255, 255, 0.55);
    font-size: 13px;
}
.breadcrumb a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: rgba(255, 255, 255, 0.75);
    transition: color 0.25s var(--ease);
}
.breadcrumb a:hover {
    color: #fff;
}
.breadcrumb-sep {
    color: rgba(255, 255, 255, 0.35);
}
.article-hero-title {
    font-size: clamp(28px, 4vw, 42px);
    line-height: 1.28;
    font-weight: 800;
    color: #fff;
    letter-spacing: 0.01em;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.25);
}
.article-hero-desc {
    margin-top: 16px;
    font-size: 16px;
    line-height: 1.75;
    color: rgba(255, 255, 255, 0.78);
    max-width: 720px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.article-hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    color: #fff;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.18);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.hero-badge i {
    color: rgba(255, 255, 255, 0.8);
}

.article-section {
    position: relative;
    padding-bottom: 88px;
    min-height: 400px;
}
.article-layout {
    max-width: 960px;
    margin: -64px auto 0;
    position: relative;
    z-index: 3;
    padding: 0 20px;
}
.article-card {
    position: relative;
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 48px 56px;
    border: 1px solid rgba(226, 230, 241, 0.6);
}
.article-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 48px;
    right: 48px;
    height: 4px;
    border-radius: 0 0 12px 12px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}

.article-content {
    font-size: 16px;
    line-height: 1.95;
    color: var(--text-main);
    word-break: break-word;
}
.article-content > * + * {
    margin-top: 1.1em;
}
.article-content h2 {
    font-size: 24px;
    font-weight: 700;
    line-height: 1.45;
    padding: 4px 0 4px 16px;
    border-left: 4px solid var(--primary);
    margin: 1.6em 0 0.8em;
    color: var(--ink);
}
.article-content h3 {
    font-size: 20px;
    font-weight: 700;
    margin: 1.5em 0 0.6em;
    color: var(--ink);
}
.article-content h4 {
    font-size: 17px;
    font-weight: 600;
    margin: 1.3em 0 0.5em;
    color: var(--ink);
}
.article-content p {
    margin: 0.9em 0;
}
.article-content a {
    color: var(--primary);
    font-weight: 500;
    border-bottom: 1px solid rgba(70, 85, 246, 0.3);
    transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}
.article-content a:hover {
    border-bottom-color: var(--primary);
    color: var(--primary-dark);
}
.article-content img {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    margin: 1.4em 0;
}
.article-content ul,
.article-content ol {
    margin: 1em 0;
    padding-left: 1.4em;
}
.article-content ul li {
    list-style: none;
    position: relative;
    padding-left: 22px;
    margin-bottom: 0.5em;
}
.article-content ul li::before {
    content: "";
    position: absolute;
    left: 4px;
    top: 0.72em;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
}
.article-content ol li {
    list-style: decimal;
    margin-bottom: 0.5em;
}
.article-content blockquote {
    border-left: 4px solid var(--accent);
    background: linear-gradient(90deg, rgba(255, 107, 61, 0.07), rgba(255, 107, 61, 0.02));
    padding: 16px 22px;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin: 1.4em 0;
    color: var(--text-soft);
}
.article-content code {
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 0.9em;
    font-family: "SFMono-Regular", Consolas, monospace;
}
.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.4em 0;
    font-size: 0.95em;
}
.article-content th,
.article-content td {
    border: 1px solid var(--border);
    padding: 10px 14px;
    text-align: left;
}
.article-content th {
    background: var(--primary-light);
    font-weight: 600;
    color: var(--ink);
}

.article-empty {
    text-align: center;
    padding: 60px 20px;
}
.empty-icon {
    width: 84px;
    height: 84px;
    margin: 0 auto 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 34px;
    color: var(--primary);
    background: var(--primary-light);
}
.article-empty h2 {
    font-size: 26px;
    margin-bottom: 12px;
    color: var(--ink);
}
.article-empty p {
    color: var(--text-soft);
    margin-bottom: 28px;
}

.article-footer-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    color: var(--text-faint);
    font-size: 14px;
}
.article-footer-meta i {
    color: var(--primary);
    margin-right: 6px;
}

.section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 44px;
}
.section-eyebrow {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 999px;
    background: var(--primary-light);
    color: var(--primary-dark);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: 14px;
}
.section-head h2 {
    font-size: clamp(24px, 3vw, 34px);
    font-weight: 800;
    color: var(--ink);
    line-height: 1.3;
    margin-bottom: 10px;
}
.section-head p {
    color: var(--text-soft);
    font-size: 16px;
}

.related-section {
    padding: 88px 0;
    background: var(--surface);
    border-top: 1px solid var(--border);
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.related-card {
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}
.related-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(70, 85, 246, 0.25);
}
.related-img {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}
.related-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s var(--ease);
}
.related-card:hover .related-img img {
    transform: scale(1.06);
}
.related-tag {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 5px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    color: #fff;
    background: rgba(10, 15, 32, 0.65);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}
.related-body {
    padding: 20px 20px 22px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.related-body h3 {
    font-size: 16px;
    font-weight: 700;
    line-height: 1.45;
    margin-bottom: 8px;
    color: var(--ink);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-body p {
    font-size: 14px;
    color: var(--text-soft);
    line-height: 1.7;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 14px;
}
.related-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
}
.related-link i {
    transition: transform 0.25s var(--ease);
}
.related-card:hover .related-link i {
    transform: translateX(4px);
}

.faq-section {
    position: relative;
    padding: 88px 0;
    background: var(--paper);
    border-bottom: 1px solid var(--border);
}
.faq-section::before {
    content: "";
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 280px;
    background: radial-gradient(closest-side, rgba(70, 85, 246, 0.06), transparent);
    pointer-events: none;
}
.faq-list {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface);
    overflow: hidden;
    transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.faq-item:hover {
    border-color: rgba(70, 85, 246, 0.35);
    box-shadow: var(--shadow-sm);
}
.faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--ink);
    list-style: none;
    user-select: none;
}
.faq-item summary::-webkit-details-marker {
    display: none;
}
.faq-item summary i {
    flex-shrink: 0;
    color: var(--primary);
    transition: transform 0.35s var(--ease);
}
.faq-item[open] summary i {
    transform: rotate(45deg);
}
.faq-answer {
    padding: 0 24px 22px;
    color: var(--text-soft);
    font-size: 15px;
    line-height: 1.85;
}
.faq-answer p {
    margin-bottom: 0.6em;
}

.cta-section {
    padding: 72px 0;
    background: #0A0F1E;
}
.cta-card {
    position: relative;
    border-radius: 28px;
    overflow: hidden;
    padding: 72px 48px;
    background-color: var(--ink-2);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    box-shadow: var(--shadow-lg);
    text-align: center;
}
.cta-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(10, 15, 30, 0.93), rgba(70, 85, 246, 0.72));
    z-index: 1;
}
.cta-content {
    position: relative;
    z-index: 2;
    max-width: 620px;
    margin: 0 auto;
}
.cta-content h2 {
    color: #fff;
    font-size: clamp(24px, 3vw, 34px);
    font-weight: 800;
    margin-bottom: 12px;
}
.cta-content p {
    color: rgba(255, 255, 255, 0.82);
    font-size: 16px;
    margin-bottom: 30px;
}

.site-footer {
    background: #080C1A;
    color: rgba(255, 255, 255, 0.72);
    font-size: 15px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 48px;
    padding: 64px 0 48px;
}
.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 19px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}
.footer-brand p {
    line-height: 1.8;
    max-width: 320px;
    color: rgba(255, 255, 255, 0.58);
    margin-top: 12px;
}
.footer-links h4,
.footer-contact h4 {
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
}
.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.footer-links a {
    color: rgba(255, 255, 255, 0.65);
    transition: color 0.25s var(--ease), padding-left 0.25s var(--ease);
}
.footer-links a:hover {
    color: #fff;
    padding-left: 4px;
}
.footer-contact p {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    color: rgba(255, 255, 255, 0.6);
}
.footer-contact i {
    color: var(--primary);
    width: 18px;
    text-align: center;
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 22px 0;
    display: flex;
    justify-content: center;
    align-items: center;
    color: rgba(255, 255, 255, 0.4);
    font-size: 13px;
}
.footer-bottom .domain {
    color: rgba(255, 255, 255, 0.65);
    font-weight: 600;
}

@media (max-width: 1024px) {
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
    }
}
@media (max-width: 768px) {
    .header-inner {
        height: 64px;
    }
    .header-cta {
        display: none;
    }
    .main-nav {
        gap: 2px;
    }
    .nav-item {
        padding: 8px 13px;
        font-size: 14px;
    }
    .article-banner {
        min-height: 320px;
        padding: 50px 0 96px;
    }
    .article-layout {
        margin-top: -56px;
        padding: 0 16px;
    }
    .article-card {
        padding: 32px 24px;
    }
    .article-card::before {
        left: 24px;
        right: 24px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
        padding: 48px 0 36px;
    }
    .cta-card {
        padding: 52px 24px;
    }
}
@media (max-width: 520px) {
    .container {
        padding: 0 16px;
    }
    .logo {
        font-size: 16px;
    }
    .logo-icon {
        width: 32px;
        height: 32px;
        font-size: 17px;
        border-radius: 10px;
    }
    .nav-item {
        padding: 7px 10px;
        font-size: 13px;
        gap: 4px;
    }
    .nav-item i {
        font-size: 12px;
    }
    .article-banner {
        min-height: 280px;
        padding: 42px 0 84px;
    }
    .article-hero-title {
        font-size: 26px;
    }
    .hero-badge {
        padding: 6px 12px;
        font-size: 12px;
    }
    .article-card {
        padding: 24px 18px;
        border-radius: 18px;
    }
    .article-content {
        font-size: 15px;
        line-height: 1.85;
    }
    .related-grid {
        grid-template-columns: 1fr;
    }
    .faq-item summary {
        font-size: 15px;
        padding: 16px 18px;
    }
    .faq-answer {
        padding: 0 18px 18px;
        font-size: 14px;
    }
    .section-head {
        margin-bottom: 30px;
    }
    .cta-card {
        padding: 44px 18px;
        border-radius: 20px;
    }
}