/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f1b2d;
            --primary-light: #1a2d4a;
            --secondary: #4a6cf7;
            --secondary-hover: #3b5de7;
            --accent: #f0a500;
            --accent-hover: #d49400;
            --accent-light: #fef3d6;
            --bg: #f5f7fc;
            --bg-white: #ffffff;
            --bg-dark: #0f1b2d;
            --bg-dark-alt: #182840;
            --bg-card: #ffffff;
            --text: #0f1b2d;
            --text-secondary: #4a5568;
            --text-light: #8899aa;
            --text-white: #f0f4f8;
            --text-muted: #a0b0c0;
            --border: #e2e8f0;
            --border-light: #f0f2f5;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-hover: 0 8px 32px rgba(74, 108, 247, 0.15);
            --radius: 14px;
            --radius-sm: 8px;
            --radius-xs: 4px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--secondary-hover);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
        }
        h2 {
            font-size: clamp(1.5rem, 3.5vw, 2.4rem);
        }
        h3 {
            font-size: clamp(1.1rem, 2vw, 1.4rem);
        }
        p {
            margin-bottom: 1em;
            color: var(--text-secondary);
        }
        p:last-child {
            margin-bottom: 0;
        }

        /* ===== 容器 ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 通用板块间距 ===== */
        .section {
            padding: 80px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header p {
            max-width: 640px;
            margin: 0 auto;
            font-size: 1.1rem;
            color: var(--text-light);
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all var(--transition);
            border: 2px solid transparent;
            text-align: center;
            justify-content: center;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--secondary);
            color: #fff;
            border-color: var(--secondary);
        }
        .btn-primary:hover {
            background: var(--secondary-hover);
            border-color: var(--secondary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.6);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-accent {
            background: var(--accent);
            color: #0f1b2d;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            color: #0f1b2d;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(240, 165, 0, 0.3);
        }
        .btn-accent:active {
            transform: translateY(0);
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 1.05rem;
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }
        .btn:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
        }

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            height: var(--header-height);
            transition: box-shadow var(--transition);
        }
        .header.scrolled {
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .logo i {
            font-size: 1.6rem;
            color: var(--secondary);
        }
        .logo span {
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover {
            color: var(--primary);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-main a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 0;
            position: relative;
            transition: color var(--transition);
        }
        .nav-main a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary);
            border-radius: 2px;
            transition: width var(--transition);
        }
        .nav-main a:hover {
            color: var(--primary);
        }
        .nav-main a:hover::after {
            width: 100%;
        }
        .nav-main a.active {
            color: var(--secondary);
        }
        .nav-main a.active::after {
            width: 100%;
            background: var(--secondary);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg);
            border-radius: 100px;
            padding: 0 16px;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--secondary);
            box-shadow: 0 0 0 3px rgba(74, 108, 247, 0.1);
        }
        .search-box input {
            background: transparent;
            border: none;
            padding: 8px 8px 8px 0;
            font-size: 0.9rem;
            color: var(--text);
            min-width: 140px;
        }
        .search-box input::placeholder {
            color: var(--text-light);
        }
        .search-box button {
            background: transparent;
            color: var(--text-light);
            cursor: pointer;
            padding: 4px;
            font-size: 1rem;
            transition: color var(--transition);
        }
        .search-box button:hover {
            color: var(--secondary);
        }
        .header-actions .btn {
            padding: 8px 20px;
            font-size: 0.9rem;
        }
        .menu-toggle {
            display: none;
            background: transparent;
            font-size: 1.5rem;
            color: var(--text);
            cursor: pointer;
            padding: 4px;
            border: none;
        }
        @media (max-width: 860px) {
            .nav-main {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                gap: 0;
                padding: 16px 24px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow);
                transform: translateY(-110%);
                opacity: 0;
                transition: all var(--transition);
                pointer-events: none;
                z-index: 999;
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-main a {
                padding: 14px 0;
                width: 100%;
                border-bottom: 1px solid var(--border-light);
                font-size: 1.05rem;
            }
            .nav-main a:last-child {
                border-bottom: none;
            }
            .nav-main a::after {
                display: none;
            }
            .menu-toggle {
                display: block;
            }
            .search-box {
                display: none;
            }
            .header-actions .btn {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
        }
        @media (max-width: 480px) {
            .header-inner {
                padding: 0 12px;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo i {
                font-size: 1.3rem;
            }
            .header-actions .btn {
                padding: 6px 12px;
                font-size: 0.8rem;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-dark);
            margin-top: var(--header-height);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.45;
            transform: scale(1.05);
            transition: transform 0.6s ease;
        }
        .hero:hover .hero-bg {
            transform: scale(1);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 27, 45, 0.92) 0%, rgba(15, 27, 45, 0.72) 60%, rgba(74, 108, 247, 0.3) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 60px 24px;
            max-width: 820px;
            width: 100%;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(74, 108, 247, 0.18);
            border: 1px solid rgba(74, 108, 247, 0.3);
            color: var(--accent);
            padding: 6px 20px;
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .hero-content h1 {
            color: var(--text-white);
            margin-bottom: 20px;
            font-weight: 800;
            letter-spacing: -0.5px;
        }
        .hero-content h1 span {
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-content p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 620px;
            margin: 0 auto 36px auto;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px;
            margin-top: 48px;
            padding-top: 36px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-white);
        }
        .hero-stat .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 2px;
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 70vh;
            }
            .hero-content {
                padding: 40px 16px;
            }
            .hero-content p {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
                padding-top: 24px;
                margin-top: 32px;
            }
            .hero-stat .num {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 480px) {
            .hero-content h1 {
                font-size: 1.6rem;
            }
            .hero-actions .btn {
                padding: 10px 20px;
                font-size: 0.9rem;
            }
            .hero-stats {
                gap: 16px;
            }
            .hero-stat .num {
                font-size: 1.2rem;
            }
        }

        /* ===== 特色板块 ===== */
        .features {
            background: var(--bg-white);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .feature-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 36px 28px;
            text-align: center;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
            background: var(--bg-white);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px auto;
            font-size: 1.6rem;
            color: #fff;
        }
        .feature-icon.purple {
            background: linear-gradient(135deg, #4a6cf7, #6c63ff);
        }
        .feature-icon.orange {
            background: linear-gradient(135deg, #f0a500, #f5b342);
        }
        .feature-icon.teal {
            background: linear-gradient(135deg, #0ea5e9, #06b6d4);
        }
        .feature-card h3 {
            margin-bottom: 12px;
            font-size: 1.15rem;
        }
        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-light);
            margin-bottom: 0;
        }
        @media (max-width: 860px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .feature-card {
                padding: 28px 20px;
            }
        }

        /* ===== 分类标签 ===== */
        .categories {
            background: var(--bg);
        }
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-top: 8px;
        }
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 100px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            cursor: default;
        }
        .tag i {
            font-size: 0.8rem;
            color: var(--text-light);
        }
        .tag:hover {
            background: var(--secondary);
            border-color: var(--secondary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .tag:hover i {
            color: rgba(255, 255, 255, 0.8);
        }
        @media (max-width: 520px) {
            .tag {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
        }

        /* ===== 最新资讯（CMS 列表） ===== */
        .latest-news {
            background: var(--bg-white);
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .news-card {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .news-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--border);
        }
        .news-card-body {
            padding: 20px 22px 24px;
        }
        .news-card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .news-card-meta .cat {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 100px;
            background: var(--accent-light);
            color: var(--accent-hover);
            font-weight: 600;
            font-size: 0.75rem;
        }
        .news-card-body h3 {
            font-size: 1.05rem;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .news-card-body h3 a {
            color: var(--text);
            transition: color var(--transition);
        }
        .news-card-body h3 a:hover {
            color: var(--secondary);
        }
        .news-card-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--text-light);
            background: var(--bg);
            border-radius: var(--radius);
            font-size: 1.05rem;
        }
        @media (max-width: 860px) {
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 520px) {
            .news-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .news-card-img {
                height: 140px;
            }
            .news-card-body {
                padding: 16px 18px 20px;
            }
        }

        /* ===== 数据统计 ===== */
        .stats {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .stats::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
        }
        .stats-inner {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .stat-item .num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
        }
        .stat-item .num small {
            font-size: 1.2rem;
            font-weight: 400;
            opacity: 0.7;
        }
        .stat-item .label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 6px;
        }
        @media (max-width: 860px) {
            .stats-inner {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
        }
        @media (max-width: 480px) {
            .stats-inner {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .stat-item .num {
                font-size: 1.8rem;
            }
        }

        /* ===== 社区板块 ===== */
        .community {
            background: var(--bg);
        }
        .community-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .community-image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .community-image img {
            width: 100%;
            height: 360px;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .community-image:hover img {
            transform: scale(1.03);
        }
        .community-text h2 {
            margin-bottom: 16px;
        }
        .community-text p {
            font-size: 1.05rem;
            margin-bottom: 20px;
            color: var(--text-secondary);
        }
        .community-features {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-bottom: 28px;
        }
        .community-features li {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.95rem;
            color: var(--text-secondary);
        }
        .community-features li i {
            width: 22px;
            color: var(--secondary);
            font-size: 1rem;
        }
        @media (max-width: 860px) {
            .community-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .community-image img {
                height: 260px;
            }
        }
        @media (max-width: 480px) {
            .community-image img {
                height: 200px;
            }
            .community-text p {
                font-size: 0.95rem;
            }
        }

        /* ===== 玩家评价 ===== */
        .testimonials {
            background: var(--bg-white);
        }
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .testimonial-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 28px 24px;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .testimonial-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .testimonial-stars {
            color: var(--accent);
            font-size: 0.9rem;
            margin-bottom: 14px;
            letter-spacing: 2px;
        }
        .testimonial-card blockquote {
            font-size: 0.95rem;
            color: var(--text-secondary);
            font-style: italic;
            margin-bottom: 16px;
            line-height: 1.7;
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .testimonial-author .avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--border);
            overflow: hidden;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--text-light);
            background: var(--border);
        }
        .testimonial-author .name {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text);
        }
        .testimonial-author .role {
            font-size: 0.8rem;
            color: var(--text-light);
        }
        @media (max-width: 860px) {
            .testimonial-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 520px) {
            .testimonial-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .testimonial-card {
                padding: 22px 18px;
            }
        }

        /* ===== FAQ ===== */
        .faq {
            background: var(--bg);
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--secondary);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 18px 24px;
            background: transparent;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            cursor: pointer;
            border: none;
            transition: color var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--secondary);
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-light);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--secondary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px 24px;
        }
        @media (max-width: 520px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 16px;
                font-size: 0.9rem;
            }
            .faq-item.active .faq-answer {
                padding: 0 16px 16px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.06;
        }
        .cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .cta-inner p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            margin-bottom: 32px;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        @media (max-width: 480px) {
            .cta-inner p {
                font-size: 0.95rem;
            }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo {
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-brand .logo span {
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 0.95rem;
            margin-bottom: 18px;
            font-weight: 600;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.6);
            font-size: 1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--secondary);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            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: var(--accent);
        }
        @media (max-width: 860px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer {
                padding: 40px 0 0 0;
            }
        }

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

        /* ===== 滚动动画 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 焦点可见性 ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
        }

        /* ===== 选中文本 ===== */
        ::selection {
            background: var(--secondary);
            color: #fff;
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #6c5ce7;
            --primary-dark: #5a4bd1;
            --primary-light: #a29bfe;
            --secondary: #fd79a8;
            --secondary-dark: #e84393;
            --accent: #fdcb6e;
            --bg: #ffffff;
            --bg-alt: #f8f7ff;
            --bg-dark: #1e1b3a;
            --text: #2d2b3a;
            --text-light: #6b6882;
            --text-inverse: #ffffff;
            --border: #e8e6f0;
            --border-light: #f0eff5;
            --shadow-sm: 0 2px 8px rgba(108, 92, 231, 0.06);
            --shadow-md: 0 8px 24px rgba(108, 92, 231, 0.10);
            --shadow-lg: 0 16px 48px rgba(108, 92, 231, 0.14);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --container: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        ul,
        ol {
            list-style: none;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 12px rgba(108, 92, 231, 0.04);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            text-decoration: none;
        }
        .logo i {
            color: var(--primary);
            font-size: 26px;
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover {
            opacity: 0.85;
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-main a {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            text-decoration: none;
            transition: var(--transition);
            position: relative;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: var(--bg-alt);
        }
        .nav-main a.active {
            color: var(--primary);
            background: var(--bg-alt);
            font-weight: 600;
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 4px;
            background: var(--primary);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: 40px;
            padding: 0 16px;
            height: 40px;
            transition: var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.08);
        }
        .search-box input {
            border: none;
            background: transparent;
            padding: 8px 0;
            width: 160px;
            color: var(--text);
            outline: none;
            font-size: 14px;
        }
        .search-box input::placeholder {
            color: var(--text-light);
            opacity: 0.7;
        }
        .search-box button {
            border: none;
            background: transparent;
            color: var(--text-light);
            cursor: pointer;
            padding: 4px 0 4px 8px;
            font-size: 15px;
            transition: var(--transition);
        }
        .search-box button:hover {
            color: var(--primary);
        }
        .btn-cta-nav {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: 40px;
            font-size: 14px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            box-shadow: 0 4px 14px rgba(108, 92, 231, 0.25);
        }
        .btn-cta-nav:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(108, 92, 231, 0.35);
            color: #fff;
        }
        .btn-cta-nav:active {
            transform: translateY(0);
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text);
            cursor: pointer;
            padding: 8px;
        }

        /* ===== Hero Section ===== */
        .hero-category {
            padding-top: calc(var(--header-h) + 40px);
            padding-bottom: 80px;
            background: var(--bg-alt);
            position: relative;
            overflow: hidden;
            min-height: 480px;
            display: flex;
            align-items: center;
        }
        .hero-category::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(108, 92, 231, 0.08), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-category::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(253, 121, 168, 0.06), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-category .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .hero-category-content h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text);
            margin-bottom: 20px;
        }
        .hero-category-content h1 span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-category-content p {
            font-size: 18px;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 520px;
        }
        .hero-category-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .hero-category-actions .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: 40px;
            font-size: 16px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            box-shadow: 0 4px 20px rgba(108, 92, 231, 0.30);
        }
        .hero-category-actions .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 32px rgba(108, 92, 231, 0.40);
            color: #fff;
        }
        .hero-category-actions .btn-primary:active {
            transform: translateY(0);
        }
        .hero-category-actions .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--border);
            border-radius: 40px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }
        .hero-category-actions .btn-outline:hover {
            border-color: var(--primary);
            background: var(--bg-alt);
            transform: translateY(-2px);
        }
        .hero-category-visual {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }
        .hero-category-visual img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            width: 100%;
            max-width: 520px;
            aspect-ratio: 16/10;
            object-fit: cover;
            transition: var(--transition);
        }
        .hero-category-visual img:hover {
            transform: scale(1.01);
            box-shadow: 0 20px 56px rgba(108, 92, 231, 0.18);
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(108, 92, 231, 0.10);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 20px;
        }
        .hero-badge i {
            font-size: 14px;
        }

        /* ===== Stats Band ===== */
        .stats-band {
            padding: 40px 0;
            background: var(--bg);
            border-bottom: 1px solid var(--border-light);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .stats-item {
            padding: 16px 8px;
        }
        .stats-item .num {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stats-item .num span {
            font-size: 20px;
            font-weight: 600;
            color: var(--primary-light);
        }
        .stats-item .label {
            font-size: 15px;
            color: var(--text-light);
            font-weight: 500;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-title {
            text-align: center;
            margin-bottom: 56px;
        }
        .section-title h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
        }
        .section-title h2 span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-title p {
            font-size: 17px;
            color: var(--text-light);
            max-width: 620px;
            margin: 0 auto;
            line-height: 1.8;
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card {
            background: var(--bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--border);
        }
        .card-img {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/9;
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .card:hover .card-img img {
            transform: scale(1.05);
        }
        .card-img .tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--primary);
            color: #fff;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .card-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }
        .card-body .meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-light);
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
            margin-top: auto;
        }
        .card-body .meta i {
            color: var(--primary-light);
            width: 16px;
        }
        .card-body .meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* ===== Feature Blocks ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }
        .feature-block {
            display: flex;
            gap: 20px;
            padding: 28px;
            background: var(--bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .feature-block:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .feature-icon {
            flex-shrink: 0;
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-alt);
            border-radius: var(--radius-sm);
            color: var(--primary);
            font-size: 24px;
        }
        .feature-text h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }
        .feature-text p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== Process / Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            counter-reset: step;
        }
        .step-card {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
        }
        .step-card::before {
            counter-increment: step;
            content: counter(step);
            display: block;
            width: 48px;
            height: 48px;
            line-height: 48px;
            text-align: center;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: 50%;
            font-size: 20px;
            font-weight: 700;
            margin: 0 auto 18px;
            box-shadow: 0 4px 14px rgba(108, 92, 231, 0.25);
        }
        .step-card h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 16px;
            transition: var(--transition);
        }
        .faq-question i {
            color: var(--primary);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.8;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--bg-dark), #2a2555);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-inverse);
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 580px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            padding: 16px 44px;
            background: #fff;
            color: var(--primary-dark);
            border-radius: 40px;
            font-size: 17px;
            font-weight: 700;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.20);
        }
        .cta-section .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.30);
            color: var(--primary);
        }
        .cta-section .btn-cta:active {
            transform: translateY(0);
        }
        .cta-section .cta-hint {
            margin-top: 20px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
            display: inline-flex;
        }
        .footer-brand .logo span {
            -webkit-text-fill-color: #fff;
            background: none;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            margin-bottom: 20px;
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50%;
            color: rgba(255, 255, 255, 0.6);
            font-size: 18px;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            margin-left: 12px;
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-category .container {
                grid-template-columns: 1fr;
                gap: 40px;
                text-align: center;
            }
            .hero-category-content p {
                margin: 0 auto 32px;
            }
            .hero-category-actions {
                justify-content: center;
            }
            .hero-category-content h1 {
                font-size: 36px;
            }
            .hero-category-visual img {
                max-width: 100%;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 850px) {
            .nav-main {
                display: none;
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
            }
            .nav-main.open {
                display: flex;
            }
            .nav-main a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }
            .nav-main a.active::after {
                display: none;
            }
            .nav-main a.active {
                background: var(--bg-alt);
            }
            .mobile-toggle {
                display: block;
            }
            .search-box {
                display: none;
            }
            .search-box.mobile-show {
                display: flex;
                width: 100%;
                margin-top: 8px;
            }
            .search-box input {
                width: 100%;
            }
            .hero-category {
                padding-top: calc(var(--header-h) + 24px);
                padding-bottom: 48px;
                min-height: auto;
            }
            .hero-category-content h1 {
                font-size: 30px;
            }
            .hero-category-content p {
                font-size: 16px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stats-item .num {
                font-size: 28px;
            }
            .card-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .section {
                padding: 56px 0;
            }
            .section-title h2 {
                font-size: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .cta-section h2 {
                font-size: 28px;
            }
        }
        @media (max-width: 520px) {
            .hero-category-content h1 {
                font-size: 26px;
            }
            .hero-category-content p {
                font-size: 15px;
            }
            .hero-category-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-category-actions .btn-primary,
            .hero-category-actions .btn-outline {
                justify-content: center;
                padding: 14px 24px;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stats-item .num {
                font-size: 24px;
            }
            .stats-item .label {
                font-size: 13px;
            }
            .feature-block {
                flex-direction: column;
                align-items: flex-start;
                padding: 20px;
            }
            .section-title h2 {
                font-size: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 10px;
                text-align: center;
            }
            .cta-section .btn-cta {
                width: 100%;
                justify-content: center;
            }
            .nav-actions .btn-cta-nav {
                padding: 8px 16px;
                font-size: 13px;
            }
        }
        @media (max-width: 420px) {
            .container {
                padding: 0 16px;
            }
            .hero-category-content h1 {
                font-size: 22px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .stats-item {
                padding: 12px 4px;
            }
            .stats-item .num {
                font-size: 20px;
            }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
:root {
  --color-primary: #1e2a3a;
  --color-primary-light: #2a3a4e;
  --color-accent: #3b82f6;
  --color-accent-hover: #2563eb;
  --color-accent-light: #eff6ff;
  --color-gold: #f59e0b;
  --color-gold-light: #fef3c7;
  --color-success: #10b981;
  --color-text: #1f2937;
  --color-text-light: #6b7280;
  --color-text-muted: #9ca3af;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-dark: #0f172a;
  --color-border: #e5e7eb;
  --color-border-light: #f1f5f9;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.08);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.10);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --content-width: 780px;
  --header-height: 72px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea { font-family: inherit; outline: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--color-text); }
h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

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

/* ===== Header & Navigation ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  transition: box-shadow var(--transition);
}
.header.scrolled { box-shadow: var(--shadow-md); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 16px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-primary);
  white-space: nowrap;
  flex-shrink: 0;
}
.logo i { color: var(--color-accent); font-size: 1.5rem; }
.nav-main {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-main a {
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-light);
  transition: all var(--transition);
  position: relative;
}
.nav-main a:hover { color: var(--color-accent); background: var(--color-accent-light); }
.nav-main a.active { color: var(--color-accent); font-weight: 600; }
.nav-main a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 18px;
  right: 18px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.search-box {
  display: flex;
  align-items: center;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  padding: 0 16px;
  transition: all var(--transition);
}
.search-box:focus-within { border-color: var(--color-accent); box-shadow: 0 0 0 3px rgba(59,130,246,0.12); }
.search-box input {
  border: none;
  background: transparent;
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--color-text);
  min-width: 160px;
}
.search-box input::placeholder { color: var(--color-text-muted); }
.search-box button { color: var(--color-text-muted); padding: 8px 0 8px 8px; font-size: 0.95rem; transition: color var(--transition); }
.search-box:focus-within button { color: var(--color-accent); }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
  border: 1px solid transparent;
}
.btn-primary { background: var(--color-accent); color: #fff; }
.btn-primary:hover { background: var(--color-accent-hover); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(59,130,246,0.30); }
.btn-primary:active { transform: translateY(0); }
.btn-outline { background: transparent; color: var(--color-accent); border-color: var(--color-accent); }
.btn-outline:hover { background: var(--color-accent); color: #fff; transform: translateY(-1px); }
.btn-sm { padding: 7px 18px; font-size: 0.85rem; }
.btn-lg { padding: 14px 32px; font-size: 1.05rem; }
.menu-toggle { display: none; font-size: 1.5rem; color: var(--color-primary); padding: 8px; }

/* ===== Article Hero ===== */
.article-hero {
  margin-top: var(--header-height);
  padding: 60px 0 40px;
  background: linear-gradient(135deg, var(--color-bg-alt) 0%, #eef2ff 100%);
  border-bottom: 1px solid var(--color-border-light);
  position: relative;
  min-height: 240px;
}
.article-hero .container { max-width: var(--content-width); }
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  font-size: 0.9rem;
  color: var(--color-text-light);
}
.article-meta .tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
}
.article-meta .date i { margin-right: 4px; }
.article-hero h1 {
  font-size: 2.5rem;
  line-height: 1.25;
  margin-bottom: 16px;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}
.article-hero .lead {
  font-size: 1.1rem;
  color: var(--color-text-light);
  line-height: 1.7;
  max-width: 90%;
}

/* ===== Article Content ===== */
.article-main {
  padding: 48px 0 64px;
}
.article-main .container { max-width: var(--content-width); }
.article-body {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--color-text);
}
.article-body h2 { margin-top: 2.2em; margin-bottom: 0.8em; font-size: 1.65rem; }
.article-body h3 { margin-top: 1.8em; margin-bottom: 0.6em; font-size: 1.3rem; }
.article-body p { margin-bottom: 1.4em; }
.article-body a { color: var(--color-accent); text-decoration: underline; text-underline-offset: 2px; }
.article-body a:hover { color: var(--color-accent-hover); }
.article-body ul, .article-body ol { margin-bottom: 1.4em; padding-left: 1.6em; }
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 0.5em; }
.article-body blockquote {
  margin: 1.6em 0;
  padding: 16px 24px;
  background: var(--color-bg-alt);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--color-text-light);
}
.article-body blockquote p:last-child { margin-bottom: 0; }
.article-body pre {
  margin: 1.6em 0;
  padding: 20px 24px;
  background: var(--color-primary);
  color: #e2e8f0;
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.6;
}
.article-body code { font-family: var(--font-mono); font-size: 0.9em; background: var(--color-bg-alt); padding: 2px 8px; border-radius: 4px; }
.article-body pre code { background: transparent; padding: 0; }
.article-body img { border-radius: var(--radius-md); margin: 1.6em 0; box-shadow: var(--shadow-md); }
.article-body hr { margin: 2em 0; border: none; border-top: 1px solid var(--color-border); }

/* ===== Article Footer (Share & Tags) ===== */
.article-footer {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.article-tags .tag {
  padding: 4px 14px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--color-text-light);
  transition: all var(--transition);
}
.article-tags .tag:hover { background: var(--color-accent-light); border-color: var(--color-accent); color: var(--color-accent); }
.article-share {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--color-text-light);
}
.article-share a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text-light);
  transition: all var(--transition);
}
.article-share a:hover { background: var(--color-accent); color: #fff; border-color: var(--color-accent); transform: translateY(-2px); }

/* ===== Not Found ===== */
.not-found {
  text-align: center;
  padding: 80px 24px;
  max-width: 600px;
  margin: 0 auto;
}
.not-found i { font-size: 4rem; color: var(--color-text-muted); margin-bottom: 24px; }
.not-found h2 { font-size: 1.75rem; margin-bottom: 12px; }
.not-found p { color: var(--color-text-light); margin-bottom: 24px; }

/* ===== Related Section ===== */
.related-section {
  padding: 64px 0;
  background: var(--color-bg-alt);
}
.related-section .section-title {
  text-align: center;
  margin-bottom: 40px;
}
.related-section .section-title h2 { font-size: 1.75rem; }
.related-section .section-title p { color: var(--color-text-light); margin-top: 8px; }
.related-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.related-card {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  border: 1px solid var(--color-border-light);
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.related-card .card-img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  display: block;
}
.related-card .card-body { padding: 16px 20px 20px; }
.related-card .card-body h4 { font-size: 1rem; margin-bottom: 6px; transition: color var(--transition); }
.related-card:hover .card-body h4 { color: var(--color-accent); }
.related-card .card-body p { font-size: 0.85rem; color: var(--color-text-light); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ===== Community CTA ===== */
.cta-section {
  padding: 72px 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, #0f172a 100%);
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  opacity: 0.08;
  pointer-events: none;
}
.cta-section .container { position: relative; z-index: 1; max-width: 680px; }
.cta-section h2 { font-size: 2rem; color: #fff; margin-bottom: 16px; }
.cta-section p { font-size: 1.1rem; color: rgba(255,255,255,0.75); margin-bottom: 32px; line-height: 1.7; }
.cta-section .btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-section .btn-white { background: #fff; color: var(--color-primary); }
.cta-section .btn-white:hover { background: var(--color-accent-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.20); }
.cta-section .btn-outline-light { background: transparent; color: #fff; border-color: rgba(255,255,255,0.40); }
.cta-section .btn-outline-light:hover { background: rgba(255,255,255,0.10); border-color: #fff; }

/* ===== Footer ===== */
.footer {
  background: var(--color-primary);
  color: rgba(255,255,255,0.80);
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo { color: #fff; margin-bottom: 16px; }
.footer-brand .logo i { color: var(--color-accent); }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.55); margin-bottom: 20px; max-width: 360px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.60);
  transition: all var(--transition);
}
.footer-social a:hover { background: var(--color-accent); color: #fff; transform: translateY(-2px); }
.footer-col h4 { font-size: 1rem; color: #fff; margin-bottom: 16px; font-weight: 600; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.55);
  transition: color var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.footer-col ul a:hover { color: var(--color-accent); }
.footer-col ul a i { font-size: 0.85rem; }
.footer-bottom {
  padding: 24px 0;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.40);
  text-align: center;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}
.footer-bottom a { color: rgba(255,255,255,0.50); }
.footer-bottom a:hover { color: var(--color-accent); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .article-hero h1 { font-size: 2rem; }
}
@media (max-width: 860px) {
  .header-actions .search-box { display: none; }
  .nav-main { gap: 0; }
  .nav-main a { padding: 8px 12px; font-size: 0.85rem; }
  .article-hero .lead { max-width: 100%; }
}
@media (max-width: 768px) {
  :root { --header-height: 64px; }
  .nav-main {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 16px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    opacity: 0;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
  }
  .nav-main.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-main a { width: 100%; padding: 12px 16px; font-size: 1rem; }
  .nav-main a.active::after { display: none; }
  .nav-main a.active { background: var(--color-accent-light); }
  .menu-toggle { display: flex; align-items: center; justify-content: center; }
  .header-actions .btn { display: none; }
  .article-hero { padding: 40px 0 28px; }
  .article-hero h1 { font-size: 1.65rem; }
  .article-hero .lead { font-size: 1rem; }
  .article-main { padding: 32px 0 48px; }
  .article-body { font-size: 1rem; }
  .related-grid { grid-template-columns: 1fr; gap: 16px; }
  .cta-section h2 { font-size: 1.5rem; }
  .cta-section p { font-size: 1rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-brand p { max-width: 100%; }
  .article-footer { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .article-hero h1 { font-size: 1.4rem; }
  .article-meta { gap: 10px; font-size: 0.8rem; }
  .cta-section .btn-group { flex-direction: column; width: 100%; }
  .cta-section .btn-group .btn { width: 100%; }
}
@media (max-width: 400px) {
  .logo span { font-size: 1.1rem; }
  .article-body { font-size: 0.95rem; }
}