/* roulang page: index */
/* ===== 设计变量 & 基础 Reset ===== */
        :root {
            --primary-500: #5c7cfa;
            --primary-600: #4c6ef5;
            --primary-700: #4263eb;
            --accent-500: #ff922b;
            --accent-600: #fd7e14;
            --text-primary: #1e293b;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --bg-body: #ffffff;
            --bg-soft: #f8fafc;
            --bg-card: #ffffff;
            --border-light: #e2e8f0;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 24px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            color: var(--text-primary);
            background: var(--bg-body);
            line-height: 1.6;
            font-size: 16px;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        /* ===== 容器 ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 1rem;
            }
        }
        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 1.5rem;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--primary-700);
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 800;
            flex-shrink: 0;
        }
        .logo span {
            color: var(--text-primary);
        }
        /* 搜索框 - 导航视觉中心 */
        .nav-search {
            flex: 1;
            max-width: 480px;
            position: relative;
            margin: 0 1rem;
        }
        .nav-search input {
            width: 100%;
            padding: 0.6rem 1rem 0.6rem 2.6rem;
            border-radius: 50px;
            background: var(--bg-soft);
            border: 1.5px solid var(--border-light);
            font-size: 0.9rem;
            color: var(--text-primary);
            transition: all var(--transition);
        }
        .nav-search input:focus {
            border-color: var(--primary-500);
            background: #fff;
            box-shadow: 0 0 0 4px rgba(92, 124, 250, 0.12);
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }
        .nav-search .search-icon {
            position: absolute;
            left: 1rem;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 0.9rem;
            pointer-events: none;
        }
        /* 导航链接 */
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
            flex-shrink: 0;
        }
        .nav-links a {
            padding: 0.45rem 1rem;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-links a:hover,
        .nav-links a:focus-visible {
            background: var(--bg-soft);
            color: var(--primary-600);
        }
        .nav-links a.active {
            background: var(--primary-50, #eef2ff);
            color: var(--primary-700);
            font-weight: 600;
        }
        .nav-cta {
            padding: 0.5rem 1.4rem;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
            color: #fff !important;
            font-weight: 600;
            font-size: 0.9rem;
            box-shadow: var(--shadow-button, 0 4px 14px rgba(92, 124, 250, 0.25));
            transition: all var(--transition);
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-cta:hover {
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(92, 124, 250, 0.35);
        }
        /* 移动端汉堡 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 4px;
            cursor: pointer;
            flex-shrink: 0;
            background: none;
            border: none;
        }
        .hamburger span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        @media (max-width: 860px) {
            .nav-search {
                display: none;
            }
            .mobile-search-show .nav-search {
                display: block;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                padding: 0.75rem 1rem;
                background: rgba(255, 255, 255, 0.98);
                border-bottom: 1px solid var(--border-light);
                max-width: 100%;
                margin: 0;
                z-index: 10;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                border-bottom: 1px solid var(--border-light);
                padding: 1rem 1.5rem;
                gap: 0.25rem;
                box-shadow: var(--shadow-md);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 0.6rem 1rem;
                width: 100%;
                border-radius: 8px;
            }
            .nav-links .nav-cta {
                margin-top: 0.5rem;
                text-align: center;
                width: 100%;
            }
            .hamburger {
                display: flex;
            }
            .nav-inner {
                gap: 0.75rem;
            }
        }
        @media (max-width: 480px) {
            .logo {
                font-size: 1.05rem;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }
            .nav-inner {
                height: 60px;
            }
        }
        /* ===== 通用板块 ===== */
        .section {
            padding: 5rem 0;
        }
        .section-alt {
            background: var(--bg-soft);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            text-align: center;
            margin-bottom: 0.75rem;
            letter-spacing: -0.02em;
        }
        .section-subtitle {
            text-align: center;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 3rem auto;
            font-size: 1.05rem;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .section {
                padding: 3rem 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 2rem;
            }
        }
        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 80vh;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(92, 124, 250, 0.15), transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(255, 146, 43, 0.08), transparent 60%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
            padding: 4rem 0;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.35rem 1.2rem;
            background: rgba(92, 124, 250, 0.15);
            border: 1px solid rgba(92, 124, 250, 0.25);
            border-radius: 50px;
            color: #a5b4fc;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 1.5rem;
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .hero h1 {
            font-size: 3.5rem;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.15;
            letter-spacing: -0.03em;
            max-width: 720px;
            margin-bottom: 1.25rem;
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, #91a7ff, #ffa94d);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 560px;
            line-height: 1.8;
            margin-bottom: 2rem;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            box-shadow: 0 4px 20px rgba(92, 124, 250, 0.35);
            transition: all var(--transition);
            border: none;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(92, 124, 250, 0.45);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--primary-500);
            outline-offset: 3px;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            font-weight: 500;
            font-size: 1rem;
            border: 1.5px solid rgba(255, 255, 255, 0.15);
            transition: all var(--transition);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.14);
            border-color: rgba(255, 255, 255, 0.25);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 2.5rem;
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-stat-item {
            text-align: left;
        }
        .hero-stat-item .num {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
        }
        .hero-stat-item .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 0.2rem;
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 70vh;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 1.5rem;
            }
            .hero-stat-item .num {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 1rem;
            }
        }
        /* ===== 卡片网格 ===== */
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
        }
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .grid-4,
            .grid-3,
            .grid-2 {
                grid-template-columns: 1fr;
            }
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 1.75rem;
            transition: all var(--transition);
            border: 1px solid rgba(226, 232, 240, 0.5);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(92, 124, 250, 0.15);
        }
        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: #fff;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
        }
        .card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }
        .card p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .card-tag {
            display: inline-block;
            padding: 0.2rem 0.75rem;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 500;
            background: var(--bg-soft);
            color: var(--text-secondary);
            margin-top: 0.75rem;
        }
        /* ===== 分类入口卡片（封面图） ===== */
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            transition: all var(--transition);
            cursor: pointer;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .category-card .cover {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }
        .category-card .info {
            padding: 1.25rem 1.5rem 1.5rem;
        }
        .category-card .info h3 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 0.35rem;
        }
        .category-card .info p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .category-card .badge {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            border-radius: 50px;
            font-size: 0.7rem;
            font-weight: 600;
            background: var(--primary-50, #eef2ff);
            color: var(--primary-700);
            margin-top: 0.6rem;
        }
        /* ===== 资讯/内容列表 ===== */
        .post-item {
            display: flex;
            gap: 1.25rem;
            padding: 1.25rem 0;
            border-bottom: 1px solid var(--border-light);
            transition: background var(--transition);
        }
        .post-item:last-child {
            border-bottom: none;
        }
        .post-item .thumb {
            width: 120px;
            min-width: 120px;
            height: 80px;
            border-radius: 10px;
            object-fit: cover;
            background: var(--bg-soft);
        }
        .post-item .content {
            flex: 1;
            min-width: 0;
        }
        .post-item .content h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 0.3rem;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-item .content h4 a:hover {
            color: var(--primary-600);
        }
        .post-item .content .meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            margin-top: 0.3rem;
        }
        .post-item .content .meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .post-item .content .excerpt {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-top: 0.4rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.6;
        }
        @media (max-width: 640px) {
            .post-item {
                flex-direction: column;
                gap: 0.75rem;
            }
            .post-item .thumb {
                width: 100%;
                height: 140px;
            }
        }
        /* ===== 数据/流程区块 ===== */
        .step-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .step-item {
            text-align: center;
            padding: 2rem 1.5rem;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 700;
            margin: 0 auto 1rem;
        }
        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 0.4rem;
        }
        .step-item p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        @media (max-width: 1024px) {
            .step-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .step-grid {
                grid-template-columns: 1fr;
            }
        }
        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 1.25rem 0;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 0.25rem 0;
            transition: color var(--transition);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-question:hover {
            color: var(--primary-600);
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
            margin-left: 1rem;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-answer.open {
            max-height: 300px;
            padding-top: 0.75rem;
        }
        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
            padding: 5rem 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.1;
            mix-blend-mode: overlay;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }
        .cta-content p {
            color: rgba(255, 255, 255, 0.65);
            font-size: 1.05rem;
            margin-bottom: 2rem;
            line-height: 1.7;
        }
        .cta-content .btn-primary {
            font-size: 1.05rem;
            padding: 0.85rem 2.4rem;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 3rem 0;
            }
            .cta-content h2 {
                font-size: 1.6rem;
            }
        }
        /* ===== 页脚 ===== */
        .site-footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.7);
            padding: 3.5rem 0 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2.5rem;
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .footer-brand .logo span {
            color: #fff;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 0.55rem;
        }
        .footer-col ul a {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition);
        }
        .footer-col ul a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: #fff;
        }
        @media (max-width: 860px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        /* ===== 空状态 ===== */
        .empty-state {
            text-align: center;
            padding: 2rem 1rem;
            color: var(--text-muted);
        }
        .empty-state i {
            font-size: 2rem;
            margin-bottom: 0.5rem;
            display: block;
        }
        /* ===== 辅助 ===== */
        .text-gradient {
            background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        .focus-visible-ring:focus-visible {
            outline: 2px solid var(--primary-500);
            outline-offset: 3px;
            border-radius: 8px;
        }
        /* 移动端搜索按钮 */
        .mobile-search-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.2rem;
            color: var(--text-secondary);
            padding: 0.4rem;
            flex-shrink: 0;
        }
        @media (max-width: 860px) {
            .mobile-search-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
        }
        @media (max-width: 480px) {
            .mobile-search-toggle {
                font-size: 1rem;
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e84c3d;
            --primary-dark: #c94032;
            --primary-light: #fce8e5;
            --primary-gradient: linear-gradient(135deg, #e84c3d 0%, #d63a2b 100%);
            --secondary: #f5a623;
            --secondary-light: #fef3e0;
            --accent: #4a90d9;
            --accent-light: #e8f0fe;
            --bg-body: #f8f9fc;
            --bg-white: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-footer: #0f0f1a;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8e8ea0;
            --text-light: #b0b0c0;
            --text-white: #f0f0f5;
            --border-color: #e8e8f0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.06);
            --shadow-lg: 0 16px 40px rgba(0,0,0,0.08);
            --shadow-xl: 0 24px 60px rgba(0,0,0,0.10);
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
        }

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

        /* ===== Container ===== */
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        @media (max-width: 768px) { .container { padding: 0 16px; } }

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(12px);
            background: rgba(255,255,255,0.92);
            box-shadow: 0 1px 4px rgba(0,0,0,0.02);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            gap: 20px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 22px;
            color: var(--text-primary);
            flex-shrink: 0;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--primary-gradient);
            color: #fff;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            box-shadow: 0 4px 12px rgba(232,76,61,0.3);
        }
        .logo span:last-child { background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-search {
            flex: 1;
            max-width: 460px;
            position: relative;
            display: flex;
            align-items: center;
        }
        .nav-search input {
            width: 100%;
            height: 44px;
            padding: 0 20px 0 46px;
            border-radius: 50px;
            background: var(--bg-body);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            font-size: 15px;
            color: var(--text-primary);
        }
        .nav-search input:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(232,76,61,0.12); background: #fff; }
        .nav-search .search-icon { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 16px; pointer-events: none; }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }
        .nav-links li a {
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-links li a:hover { background: var(--primary-light); color: var(--primary); }
        .nav-links li a.active { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(232,76,61,0.25); }
        .nav-links li a.nav-cta {
            background: var(--primary-gradient);
            color: #fff;
            padding: 8px 20px;
            box-shadow: 0 4px 14px rgba(232,76,61,0.3);
        }
        .nav-links li a.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(232,76,61,0.4); }
        .hamburger, .mobile-search-toggle { display: none; flex-direction: column; cursor: pointer; background: none; border: none; padding: 4px; }
        .hamburger span { width: 24px; height: 2.5px; background: var(--text-primary); border-radius: 4px; margin: 3px 0; transition: var(--transition); }
        @media (max-width: 1024px) {
            .nav-search { max-width: 300px; }
        }
        @media (max-width: 768px) {
            .nav-inner { height: 62px; }
            .nav-search { display: none; }
            .mobile-search-toggle { display: flex; font-size: 20px; color: var(--text-secondary); padding: 8px; }
            .hamburger { display: flex; }
            .nav-links {
                position: fixed;
                top: 62px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                box-shadow: 0 20px 40px rgba(0,0,0,0.08);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 1px solid var(--border-color);
                z-index: 999;
            }
            .nav-links.open { transform: translateY(0); opacity: 1; }
            .nav-links li a { width: 100%; padding: 12px 16px; font-size: 16px; }
            .nav-search.mobile-open {
                display: flex;
                position: absolute;
                top: 62px;
                left: 0;
                right: 0;
                max-width: 100%;
                padding: 12px 16px 16px;
                background: var(--bg-white);
                border-bottom: 1px solid var(--border-color);
                z-index: 998;
                box-shadow: 0 12px 24px rgba(0,0,0,0.04);
            }
        }
        @media (max-width: 480px) {
            .logo { font-size: 18px; }
            .logo-icon { width: 32px; height: 32px; font-size: 16px; }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-bar {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            padding: 14px 0;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb-bar a { color: var(--text-secondary); }
        .breadcrumb-bar a:hover { color: var(--primary); }
        .breadcrumb-bar .sep { margin: 0 8px; color: var(--text-light); }
        .breadcrumb-bar .current { color: var(--text-primary); font-weight: 500; }

        /* ===== Article Hero ===== */
        .article-hero {
            background: var(--bg-white);
            padding: 48px 0 32px;
            border-bottom: 1px solid var(--border-color);
        }
        .article-hero .article-category {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .article-hero h1 {
            font-size: clamp(26px, 4vw, 42px);
            font-weight: 800;
            line-height: 1.25;
            max-width: 860px;
            color: var(--text-primary);
        }
        .article-hero .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 20px;
            font-size: 15px;
            color: var(--text-muted);
        }
        .article-hero .article-meta i { margin-right: 6px; color: var(--primary); }
        .article-hero .article-meta span { display: flex; align-items: center; }

        /* ===== Article Body ===== */
        .article-main {
            padding: 40px 0 60px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }
        .article-content {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 40px 44px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .article-content h2 {
            font-size: 24px;
            margin-top: 40px;
            margin-bottom: 16px;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--primary-light);
        }
        .article-content h3 {
            font-size: 20px;
            margin-top: 32px;
            margin-bottom: 12px;
        }
        .article-content p {
            margin-bottom: 18px;
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.85;
        }
        .article-content img {
            border-radius: var(--radius-md);
            margin: 24px 0;
            width: 100%;
            box-shadow: var(--shadow-sm);
        }
        .article-content ul, .article-content ol {
            margin-bottom: 18px;
            padding-left: 24px;
            color: var(--text-secondary);
        }
        .article-content li { margin-bottom: 8px; }
        .article-content ul li { list-style: disc; }
        .article-content ol li { list-style: decimal; }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 20px;
            margin: 24px 0;
            background: var(--primary-light);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
        .article-content a:hover { color: var(--primary-dark); }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
        }
        .article-tags .tag {
            padding: 6px 16px;
            border-radius: 50px;
            background: var(--bg-body);
            color: var(--text-secondary);
            font-size: 13px;
            font-weight: 500;
            transition: var(--transition);
        }
        .article-tags .tag:hover { background: var(--primary-light); color: var(--primary); }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .sidebar-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); font-size: 18px; }
        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-color);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list li a {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.5;
        }
        .sidebar-list li a:hover { color: var(--primary); }
        .sidebar-list li a .num {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            background: var(--bg-body);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
            color: var(--text-muted);
        }
        .sidebar-list li a:hover .num { background: var(--primary-light); color: var(--primary); }
        .sidebar-cta {
            background: var(--primary-gradient);
            color: #fff;
            border: none;
            border-radius: var(--radius-md);
            padding: 20px 24px;
            text-align: center;
        }
        .sidebar-cta h3 { color: #fff; }
        .sidebar-cta p { color: rgba(255,255,255,0.85); font-size: 14px; margin-bottom: 16px; }
        .sidebar-cta .btn-white {
            background: #fff;
            color: var(--primary);
            padding: 10px 28px;
            border-radius: 50px;
            font-weight: 600;
            display: inline-block;
            transition: var(--transition);
        }
        .sidebar-cta .btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.15); }

        /* ===== Article Navigation ===== */
        .article-nav {
            margin-top: 40px;
            display: flex;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }
        .article-nav a {
            padding: 12px 24px;
            border-radius: 50px;
            border: 1px solid var(--border-color);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-white);
        }
        .article-nav a:hover { border-color: var(--primary); color: var(--primary); box-shadow: var(--shadow-sm); }

        /* ===== Related Posts ===== */
        .related-section {
            background: var(--bg-white);
            padding: 48px 0;
            border-top: 1px solid var(--border-color);
        }
        .related-section h2 {
            font-size: 26px;
            font-weight: 800;
            margin-bottom: 28px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 24px;
        }
        .related-card {
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
            background: var(--bg-body);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
        .related-card img { width: 100%; height: 160px; object-fit: cover; border-radius: 0; }
        .related-card .card-body { padding: 16px 18px 20px; }
        .related-card .card-body h3 { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
        .related-card .card-body h3 a { color: var(--text-primary); }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body p { font-size: 14px; color: var(--text-muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .related-card .card-meta { font-size: 12px; color: var(--text-light); margin-top: 8px; display: flex; gap: 12px; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-footer);
            color: var(--text-light);
            padding: 56px 0 0;
            border-top: 3px solid var(--primary);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; }
        .footer-brand .logo .logo-icon { background: var(--primary-gradient); }
        .footer-brand .logo span:last-child { -webkit-text-fill-color: #fff; background: none; }
        .footer-brand p { font-size: 14px; line-height: 1.8; color: var(--text-light); max-width: 380px; }
        .footer-col h4 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 16px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: var(--text-light); font-size: 14px; transition: var(--transition); display: flex; align-items: center; gap: 6px; }
        .footer-col ul li a:hover { color: var(--primary); padding-left: 4px; }
        .footer-col ul li a i { width: 18px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0;
            font-size: 13px;
            color: var(--text-light);
        }
        .footer-bottom a { color: var(--text-light); }
        .footer-bottom a:hover { color: var(--primary); }
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 480px) {
            .footer-grid { grid-template-columns: 1fr; }
        }

        /* ===== Article Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
        }
        @media (max-width: 768px) {
            .article-content { padding: 24px 20px; }
            .article-sidebar { grid-template-columns: 1fr; }
            .article-hero h1 { font-size: 24px; }
            .article-hero { padding: 32px 0 24px; }
            .related-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 480px) {
            .related-grid { grid-template-columns: 1fr; }
            .article-content h2 { font-size: 20px; }
            .article-content h3 { font-size: 17px; }
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 60px 24px;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
        }
        .not-found-box i { font-size: 56px; color: var(--text-light); margin-bottom: 20px; }
        .not-found-box h2 { font-size: 24px; margin-bottom: 12px; }
        .not-found-box p { color: var(--text-muted); margin-bottom: 20px; }
        .not-found-box .btn-back {
            display: inline-block;
            padding: 12px 32px;
            background: var(--primary-gradient);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
        }
        .not-found-box .btn-back:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,76,61,0.3); }

        /* ===== Animations ===== */
        .fade-up { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
        .fade-up.show { opacity: 1; transform: translateY(0); }

/* roulang page: category1 */
:root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #457b9d;
            --secondary-dark: #1d3557;
            --accent: #f4a261;
            --bg-light: #f8f9fa;
            --bg-dark: #1d3557;
            --text-dark: #1a1a2e;
            --text-muted: #6c757d;
            --border-light: #e9ecef;
            --border-radius: 12px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.10);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.14);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: #fff;
            color: var(--text-dark);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        a { text-decoration: none; color: inherit; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; border-radius: 8px; }
        button, input { font-family: inherit; font-size: inherit; outline: none; border: none; }
        ul { list-style: none; padding: 0; margin: 0; }

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

        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
            color: var(--text-dark);
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 2.5rem auto;
            text-align: center;
            line-height: 1.6;
        }

        .text-center { text-align: center; }

        /* ===== Header ===== */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .site-header .container { width: 100%; }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: nowrap;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-dark);
            flex-shrink: 0;
        }

        .logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            font-weight: 900;
            font-size: 1.2rem;
        }

        .nav-search {
            flex: 1;
            max-width: 420px;
            position: relative;
            margin: 0 12px;
        }

        .nav-search input {
            width: 100%;
            padding: 10px 18px 10px 44px;
            border-radius: 40px;
            border: 1.5px solid var(--border-light);
            background: var(--bg-light);
            font-size: 0.95rem;
            transition: var(--transition);
        }

        .nav-search input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(230, 57, 70, 0.12);
            background: #fff;
        }

        .nav-search .search-icon {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 0.95rem;
            pointer-events: none;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }

        .nav-links li a {
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-dark);
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-links li a:hover {
            background: var(--bg-light);
            color: var(--primary);
        }

        .nav-links li a.active {
            background: var(--primary);
            color: #fff;
        }

        .nav-links li a.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 8px 20px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-links li a.nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(230,57,70,0.3);
        }

        .hamburger, .mobile-search-toggle { display: none; background: none; cursor: pointer; }

        .hamburger span {
            display: block;
            width: 26px;
            height: 3px;
            background: var(--text-dark);
            border-radius: 3px;
            margin: 5px 0;
            transition: var(--transition);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.85);
            padding: 60px 0 30px;
            margin-top: 60px;
        }

        .site-footer .logo {
            color: #fff;
            margin-bottom: 16px;
        }

        .site-footer .logo .logo-icon {
            background: var(--primary);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }

        .footer-brand p {
            font-size: 0.95rem;
            line-height: 1.7;
            max-width: 320px;
            color: rgba(255,255,255,0.65);
        }

        .footer-col h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 18px;
            color: #fff;
        }

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

        .footer-col ul li a {
            color: rgba(255,255,255,0.65);
            font-size: 0.92rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom a {
            color: rgba(255,255,255,0.6);
        }

        .footer-bottom a:hover { color: #fff; }

        /* ===== Page Banner ===== */
        .page-banner {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #0d1b2a 100%);
            padding: 80px 0 70px;
            position: relative;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.10;
            pointer-events: none;
        }

        .page-banner .container {
            position: relative;
            z-index: 1;
        }

        .page-banner h1 {
            font-size: 3rem;
            font-weight: 900;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            line-height: 1.2;
        }

        .page-banner p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.75);
            max-width: 600px;
            line-height: 1.7;
        }

        /* ===== Category Tabs ===== */
        .category-tabs {
            background: #fff;
            border-bottom: 1px solid var(--border-light);
            padding: 16px 0;
            position: sticky;
            top: 72px;
            z-index: 99;
        }

        .category-tabs .tabs-scroll {
            display: flex;
            gap: 8px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            padding: 4px 0;
        }

        .category-tabs .tabs-scroll::-webkit-scrollbar { display: none; }

        .category-tabs .tab-btn {
            padding: 8px 20px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            background: var(--bg-light);
            color: var(--text-dark);
            border: 1px solid transparent;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .category-tabs .tab-btn:hover {
            background: #e9ecef;
            color: var(--primary);
        }

        .category-tabs .tab-btn.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

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

        .feature-card {
            background: #fff;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

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

        .feature-card .card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .feature-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .feature-card:hover .card-img img {
            transform: scale(1.05);
        }

        .feature-card .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(230,57,70,0.92);
            color: #fff;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 600;
            backdrop-filter: blur(4px);
        }

        .feature-card .card-body {
            padding: 24px 22px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .feature-card .card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-dark);
        }

        .feature-card .card-body p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
        }

        .feature-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 16px;
            border-top: 1px solid var(--border-light);
            margin-top: 14px;
        }

        .feature-card .card-footer .btn-sm {
            padding: 6px 18px;
            border-radius: 30px;
            background: var(--primary);
            color: #fff;
            font-size: 0.82rem;
            font-weight: 600;
            transition: var(--transition);
        }

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

        .feature-card .card-footer .meta {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* ===== Hot Ranking ===== */
        .hot-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px 40px;
        }

        .hot-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 16px 20px;
            background: var(--bg-light);
            border-radius: var(--border-radius);
            transition: var(--transition);
        }

        .hot-item:hover {
            background: #fff;
            box-shadow: var(--shadow-sm);
            transform: translateX(4px);
        }

        .hot-item .rank {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1rem;
            color: #fff;
            flex-shrink: 0;
        }

        .hot-item .rank.r1 { background: #e63946; }
        .hot-item .rank.r2 { background: #f4a261; }
        .hot-item .rank.r3 { background: #457b9d; }
        .hot-item .rank.r4 { background: #6c757d; }
        .hot-item .rank.r5 { background: #2a9d8f; }
        .hot-item .rank.r6 { background: #8338ec; }

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

        .hot-item .hot-info h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 2px;
        }

        .hot-item .hot-info span {
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .hot-item .hot-count {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--primary);
        }

        /* ===== Steps / Flow ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .step-card {
            background: #fff;
            border-radius: var(--border-radius);
            padding: 32px 24px 28px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
        }

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

        .step-card .step-num {
            counter-increment: step;
            content: counter(step);
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 800;
            margin: 0 auto 16px;
        }

        .step-card .step-num::before {
            content: counter(step);
        }

        .step-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--border-light);
            border-radius: var(--border-radius);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1.02rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            background: var(--bg-light);
            transition: var(--transition);
            gap: 12px;
        }

        .faq-question:hover {
            background: #e9ecef;
        }

        .faq-question i {
            transition: var(--transition);
            color: var(--primary);
            font-size: 1.1rem;
            flex-shrink: 0;
        }

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

        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: var(--transition);
            color: var(--text-muted);
            line-height: 1.7;
            background: #fff;
        }

        .faq-item.active .faq-answer {
            padding: 18px 24px 22px;
            max-height: 400px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #0d1b2a 100%);
            border-radius: var(--border-radius);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.06;
            pointer-events: none;
        }

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

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }

        .cta-section p {
            color: rgba(255,255,255,0.7);
            font-size: 1.05rem;
            max-width: 520px;
            margin: 0 auto 28px;
        }

        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            border-radius: 40px;
            background: var(--primary);
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            transition: var(--transition);
            box-shadow: 0 8px 24px rgba(230,57,70,0.35);
        }

        .cta-section .btn-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(230,57,70,0.45);
        }

        /* ===== Spacings ===== */
        .section-padding {
            padding: 64px 0;
        }

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

        .section-bg-light {
            background: var(--bg-light);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .feature-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .nav-search { display: none; }
            .mobile-search-toggle { display: block; font-size: 1.3rem; color: var(--text-dark); padding: 4px 8px; }
            .hamburger { display: block; padding: 4px 8px; }

            .nav-links {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 20px 24px;
                box-shadow: 0 12px 32px rgba(0,0,0,0.12);
                border-radius: 0 0 16px 16px;
                gap: 4px;
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                z-index: 999;
            }

            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .nav-links li a {
                width: 100%;
                padding: 12px 16px;
                text-align: center;
            }

            .nav-search.mobile-show {
                display: block;
                max-width: 100%;
                margin: 8px 0 12px;
            }

            .page-banner { padding: 56px 0 48px; }
            .page-banner h1 { font-size: 2.2rem; }

            .feature-grid { grid-template-columns: 1fr; }
            .hot-list { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .section-title { font-size: 1.7rem; }
            .cta-section { padding: 40px 24px; }
            .cta-section h2 { font-size: 1.5rem; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .page-banner h1 { font-size: 1.7rem; }
            .page-banner p { font-size: 0.95rem; }
            .steps-grid { grid-template-columns: 1fr; }
            .feature-card .card-img { height: 180px; }
            .category-tabs .tab-btn { padding: 6px 14px; font-size: 0.82rem; }
            .cta-section .btn-cta { padding: 14px 28px; font-size: 0.95rem; }
        }

        /* ===== Active tab style for FAQ ===== */
        .faq-item.active {
            border-color: var(--primary);
        }

        /* ===== Smooth Scroll ===== */
        html {
            scroll-behavior: smooth;
        }

        /* ===== Focus Visible ===== */
        a:focus-visible, button:focus-visible, input:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
            border-radius: 4px;
        }