/* roulang page: index */
:root {
            --primary: #2F6FED;
            --primary-dark: #1E4FBF;
            --accent-orange: #FF7A1A;
            --accent-cyan: #16B8C5;
            --bg-page: #F7FAFD;
            --bg-white: #FFFFFF;
            --text-main: #16304D;
            --text-muted: #6B7F99;
            --border-light: #E6EEF6;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-card: 0 6px 18px rgba(18, 40, 80, 0.06);
            --shadow-card-hover: 0 10px 28px rgba(18, 40, 80, 0.12);
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Source Han Sans SC', 'Noto Sans CJK SC', sans-serif;
            --transition: all 0.25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-main);
            background: var(--bg-page);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a:hover {
            color: var(--primary-dark);
            text-decoration: none;
        }

        a:focus,
        button:focus,
        input:focus,
        textarea:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

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

        ul,
        ol {
            list-style: none;
        }

        button {
            font-family: var(--font-stack);
            cursor: pointer;
            border: none;
            background: none;
        }

        /* Container */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 2px 12px rgba(18, 40, 80, 0.04);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            flex-wrap: wrap;
            gap: 12px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .brand-logo i {
            font-size: 1.6rem;
            color: var(--accent-orange);
        }

        .brand-logo:hover {
            color: var(--primary-dark);
        }

        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }

        .desktop-nav .nav-link {
            display: inline-block;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            white-space: nowrap;
        }

        .desktop-nav .nav-link:hover {
            background: rgba(47, 111, 237, 0.06);
            color: var(--primary);
        }

        .desktop-nav .nav-link.active {
            background: rgba(47, 111, 237, 0.1);
            color: var(--primary);
            font-weight: 600;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 999px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            white-space: nowrap;
            box-shadow: 0 4px 12px rgba(47, 111, 237, 0.25);
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 6px 16px rgba(47, 111, 237, 0.35);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(47, 111, 237, 0.25);
        }

        /* Mobile Tab Navigation */
        .mobile-tab-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: var(--bg-white);
            border-top: 1px solid var(--border-light);
            box-shadow: 0 -4px 20px rgba(18, 40, 80, 0.08);
            z-index: 200;
            padding: 8px 4px 10px;
            justify-content: space-around;
            align-items: center;
        }

        .mobile-tab-nav .tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 3px;
            font-size: 0.72rem;
            color: var(--text-muted);
            padding: 6px 10px;
            border-radius: 10px;
            transition: var(--transition);
            min-width: 58px;
        }

        .mobile-tab-nav .tab-item i {
            font-size: 1.25rem;
        }

        .mobile-tab-nav .tab-item:hover {
            color: var(--primary);
            background: rgba(47, 111, 237, 0.05);
        }

        .mobile-tab-nav .tab-item.active {
            color: var(--primary);
            background: rgba(47, 111, 237, 0.08);
            font-weight: 600;
        }

        body.has-mobile-tab {
            padding-bottom: 72px;
        }

        /* Section Base */
        .section {
            padding: 72px 0;
            position: relative;
        }

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

        .section-grey {
            background: #F0F5FB;
        }

        .section-title-block {
            margin-bottom: 40px;
        }

        .section-tag {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 999px;
            background: rgba(47, 111, 237, 0.08);
            color: var(--primary);
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 10px;
        }

        .section-title-block h2 {
            font-size: 1.85rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .section-title-block p {
            font-size: 1.02rem;
            color: var(--text-muted);
            max-width: 720px;
            line-height: 1.75;
        }

        .section-title-block.center {
            text-align: center;
        }

        .section-title-block.center p {
            margin: 0 auto;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
            border: none;
            font-family: var(--font-stack);
            line-height: 1;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(47, 111, 237, 0.28);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 6px 20px rgba(47, 111, 237, 0.38);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(47, 111, 237, 0.2);
        }

        .btn-secondary {
            background: rgba(47, 111, 237, 0.08);
            color: var(--primary);
            border: 1px solid rgba(47, 111, 237, 0.2);
        }

        .btn-secondary:hover {
            background: rgba(47, 111, 237, 0.14);
            color: var(--primary-dark);
            border-color: rgba(47, 111, 237, 0.35);
            transform: translateY(-2px);
        }

        .btn-orange {
            background: var(--accent-orange);
            color: #fff;
            box-shadow: 0 4px 14px rgba(255, 111, 26, 0.28);
        }

        .btn-orange:hover {
            background: #E86A0E;
            color: #fff;
            box-shadow: 0 6px 20px rgba(255, 111, 26, 0.38);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }

        /* Hero */
        .hero-section {
            background: var(--bg-white);
            padding: 80px 0 72px;
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -200px;
            right: -200px;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(47, 111, 237, 0.05), transparent 70%);
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 460px;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-left h1 {
            font-size: 2.35rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 18px;
            letter-spacing: -0.5px;
        }

        .hero-left h1 .highlight {
            color: var(--primary);
        }

        .hero-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 520px;
            margin-bottom: 28px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 30px;
        }

        .hero-stats {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
        }

        .hero-stat-item {
            display: flex;
            flex-direction: column;
        }

        .hero-stat-item .stat-number {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-dark);
            line-height: 1.2;
        }

        .hero-stat-item .stat-label {
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .hero-right {
            position: relative;
        }

        .hero-right-bg {
            position: absolute;
            inset: 0;
            border-radius: var(--radius-lg);
            overflow: hidden;
            z-index: 0;
        }

        .hero-right-bg img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }

        .hero-right-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(18, 40, 80, 0.7) 0%, rgba(30, 79, 191, 0.45) 100%);
            border-radius: var(--radius-lg);
        }

        .hero-quick-grid {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            padding: 24px;
        }

        .hero-quick-card {
            background: rgba(255, 255, 255, 0.95);
            border-radius: var(--radius-md);
            padding: 18px 16px;
            text-align: center;
            box-shadow: 0 6px 20px rgba(18, 40, 80, 0.15);
            transition: var(--transition);
            cursor: pointer;
            display: block;
            color: var(--text-main);
        }

        .hero-quick-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 10px 28px rgba(18, 40, 80, 0.22);
            color: var(--text-main);
        }

        .hero-quick-card i {
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 8px;
            display: block;
        }

        .hero-quick-card .quick-label {
            font-size: 0.88rem;
            font-weight: 600;
        }

        .hero-quick-card .quick-desc {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-top: 3px;
        }

        /* Category Entry */
        .category-entry-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr 1fr;
            gap: 20px;
        }

        .category-feature-card {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            padding: 28px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            min-height: 280px;
            position: relative;
        }

        .category-feature-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
        }

        .category-feature-card .cat-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 14px;
        }

        .category-feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .category-feature-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 16px;
        }

        .category-feature-card .cat-link {
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .category-small-grid {
            display: grid;
            gap: 20px;
        }

        .category-small-card {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            padding: 22px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            min-height: 130px;
        }

        .category-small-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
        }

        .category-small-card .cat-sm-icon {
            font-size: 1.4rem;
            color: var(--accent-orange);
            margin-bottom: 8px;
        }

        .category-small-card h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .category-small-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.55;
            margin-bottom: 8px;
        }

        .category-small-card .cat-link {
            font-size: 0.85rem;
            font-weight: 600;
        }

        /* Featured */
        .featured-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .featured-card {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            display: flex;
            gap: 20px;
            padding: 0;
            transition: var(--transition);
        }

        .featured-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
        }

        .featured-card-img {
            flex: 0 0 180px;
            min-height: 100%;
        }

        .featured-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-md) 0 0 var(--radius-md);
        }

        .featured-card-content {
            padding: 22px 20px 22px 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

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

        .featured-card-content p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 12px;
        }

        .featured-tag {
            display: inline-block;
            padding: 3px 10px;
            border-radius: 999px;
            background: rgba(22, 184, 197, 0.1);
            color: var(--accent-cyan);
            font-size: 0.78rem;
            font-weight: 600;
            margin-bottom: 10px;
            align-self: flex-start;
        }

        /* Data Stats */
        .data-stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .data-stat-card {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            padding: 24px;
            text-align: center;
            transition: var(--transition);
        }

        .data-stat-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
        }

        .data-stat-card .stat-value {
            font-size: 1.85rem;
            font-weight: 700;
            color: var(--primary-dark);
            line-height: 1.2;
            margin-bottom: 4px;
        }

        .data-stat-card .stat-title {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* Process Steps */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .process-step {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            padding: 26px 22px;
            text-align: center;
            position: relative;
            transition: var(--transition);
        }

        .process-step:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
        }

        .process-step .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 1.05rem;
            margin-bottom: 14px;
        }

        .process-step h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .process-step p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Case Wall */
        .case-wall-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            grid-template-rows: auto auto;
            gap: 20px;
        }

        .case-card {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
        }

        .case-card .case-img {
            aspect-ratio: 16/9;
            overflow: hidden;
        }

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

        .case-card:hover .case-img img {
            transform: scale(1.03);
        }

        .case-card .case-content {
            padding: 18px;
        }

        .case-card .case-content h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .case-card .case-content p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.55;
        }

        .case-card.large {
            grid-row: span 2;
        }

        .case-card.large .case-img {
            aspect-ratio: 16/10;
        }

        /* Brand Intro */
        .brand-intro-section {
            background: var(--bg-white);
        }

        .brand-intro-grid {
            display: grid;
            grid-template-columns: 1fr 1.4fr;
            gap: 40px;
            align-items: center;
        }

        .brand-intro-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .brand-intro-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }

        .brand-intro-content h2 {
            font-size: 1.7rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .brand-intro-content p {
            font-size: 0.98rem;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 14px;
        }

        /* News */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-item {
            display: flex;
            gap: 18px;
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            padding: 16px;
            transition: var(--transition);
            align-items: center;
        }

        .news-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
        }

        .news-thumb {
            flex: 0 0 140px;
            aspect-ratio: 4/3;
            border-radius: var(--radius-sm);
            overflow: hidden;
        }

        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-sm);
        }

        .news-content {
            flex: 1;
            min-width: 0;
        }

        .news-meta {
            display: flex;
            gap: 12px;
            align-items: center;
            margin-bottom: 6px;
            flex-wrap: wrap;
        }

        .news-date {
            font-size: 0.78rem;
            color: var(--text-muted);
            background: rgba(47, 111, 237, 0.06);
            padding: 3px 10px;
            border-radius: 999px;
        }

        .news-tag {
            font-size: 0.78rem;
            color: var(--accent-orange);
            background: rgba(255, 122, 26, 0.08);
            padding: 3px 10px;
            border-radius: 999px;
            font-weight: 600;
        }

        .news-content h3 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .news-content p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.55;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
        }

        /* Partners */
        .partners-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 16px;
        }

        .partner-card {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            padding: 20px 14px;
            text-align: center;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 90px;
        }

        .partner-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
        }

        .partner-card i {
            font-size: 1.5rem;
            color: var(--primary);
        }

        .partner-card .partner-name {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-main);
        }

        /* FAQ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--text-main);
            gap: 14px;
            user-select: none;
            transition: var(--transition);
        }

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

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(47, 111, 237, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 0.8rem;
            transition: var(--transition);
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 22px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }

        .faq-answer p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* Safeguard */
        .safeguard-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
        }

        .safeguard-item {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            padding: 20px 16px;
            text-align: center;
            transition: var(--transition);
        }

        .safeguard-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
        }

        .safeguard-item i {
            font-size: 1.6rem;
            color: var(--accent-cyan);
            margin-bottom: 10px;
            display: block;
        }

        .safeguard-item h4 {
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 5px;
        }

        .safeguard-item p {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.45;
        }

        /* CTA Section */
        .cta-section {
            background: var(--bg-white);
        }

        .cta-panel {
            background: linear-gradient(135deg, #EAF1FB 0%, #F7FAFD 100%);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 44px 40px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            align-items: center;
            box-shadow: var(--shadow-card);
        }

        .cta-left h2 {
            font-size: 1.55rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-left p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .cta-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .cta-form input[type="text"],
        .cta-form input[type="tel"],
        .cta-form textarea {
            flex: 1;
            min-width: 180px;
            padding: 12px 16px;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            font-family: var(--font-stack);
            font-size: 0.92rem;
            color: var(--text-main);
            background: var(--bg-white);
            transition: var(--transition);
        }

        .cta-form input:focus,
        .cta-form textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(47, 111, 237, 0.1);
        }

        .cta-form textarea {
            width: 100%;
            min-height: 80px;
            resize: vertical;
        }

        .cta-form .btn {
            flex-shrink: 0;
        }

        /* Footer */
        .site-footer {
            background: #0F1E35;
            color: rgba(255, 255, 255, 0.75);
            padding: 52px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand .brand-logo {
            color: #fff;
            font-size: 1.3rem;
        }

        .footer-brand p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            margin-top: 10px;
            max-width: 280px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 0.98rem;
            font-weight: 600;
            margin-bottom: 14px;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.88rem;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
        }

        .footer-bottom .footer-links {
            display: flex;
            gap: 18px;
        }

        .footer-bottom .footer-links a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.85rem;
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-right {
                max-width: 520px;
                margin: 0 auto;
            }
            .category-entry-grid {
                grid-template-columns: 1fr 1fr;
            }
            .category-feature-card {
                grid-column: span 2;
                min-height: 200px;
            }
            .featured-grid {
                grid-template-columns: 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr 1fr;
            }
            .case-wall-grid {
                grid-template-columns: 1fr 1fr;
            }
            .case-card.large {
                grid-column: span 2;
                grid-row: auto;
            }
            .brand-intro-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .partners-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .safeguard-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .cta-panel {
                grid-template-columns: 1fr;
                padding: 32px 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .data-stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-title-block h2 {
                font-size: 1.5rem;
            }
            .hero-section {
                padding: 56px 0 48px;
            }
            .hero-left h1 {
                font-size: 1.75rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .hero-stats {
                gap: 18px;
            }
            .category-entry-grid {
                grid-template-columns: 1fr;
            }
            .category-feature-card {
                grid-column: auto;
                min-height: 200px;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .case-wall-grid {
                grid-template-columns: 1fr;
            }
            .case-card.large {
                grid-column: auto;
            }
            .partners-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .safeguard-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .data-stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .news-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .news-thumb {
                flex: 0 0 auto;
                width: 100%;
                aspect-ratio: 16/9;
            }
            .featured-card {
                flex-direction: column;
            }
            .featured-card-img {
                flex: 0 0 auto;
                width: 100%;
                aspect-ratio: 16/9;
            }
            .featured-card-img img {
                border-radius: var(--radius-md) var(--radius-md) 0 0;
            }
            .featured-card-content {
                padding: 18px;
            }
            .cta-form input[type="text"],
            .cta-form input[type="tel"] {
                min-width: 100%;
            }
            .cta-form .btn {
                width: 100%;
            }
            .desktop-nav {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .mobile-tab-nav {
                display: flex;
            }
            body.has-mobile-tab {
                padding-bottom: 76px;
            }
        }

        @media (max-width: 520px) {
            .hero-left h1 {
                font-size: 1.45rem;
            }
            .hero-subtitle {
                font-size: 0.9rem;
            }
            .hero-quick-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
                padding: 14px;
            }
            .hero-quick-card {
                padding: 14px 10px;
            }
            .hero-quick-card i {
                font-size: 1.3rem;
            }
            .data-stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .data-stat-card {
                padding: 16px 12px;
            }
            .data-stat-card .stat-value {
                font-size: 1.4rem;
            }
            .partners-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .safeguard-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .cta-panel {
                padding: 24px 18px;
            }
            .cta-left h2 {
                font-size: 1.3rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .section-title-block h2 {
                font-size: 1.3rem;
            }
            .brand-intro-content h2 {
                font-size: 1.35rem;
            }
            .news-content h3 {
                font-size: 0.92rem;
            }
            .news-content p {
                font-size: 0.82rem;
            }
        }

/* roulang page: category3 */
:root {
        --primary: #2F6FED;
        --primary-dark: #1E4FBF;
        --accent-orange: #FF7A1A;
        --accent-cyan: #16B8C5;
        --bg-page: #F7FAFD;
        --bg-white: #FFFFFF;
        --text-main: #16304D;
        --text-muted: #6B7F99;
        --border-light: #E6EEF6;
        --radius-sm: 8px;
        --radius-md: 14px;
        --radius-lg: 20px;
        --shadow-card: 0 6px 18px rgba(18, 40, 80, 0.06);
        --shadow-card-hover: 0 10px 28px rgba(18, 40, 80, 0.12);
        --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Source Han Sans SC', 'Noto Sans CJK SC', sans-serif;
        --transition: all 0.25s ease;
    }

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

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: var(--font-stack);
        font-size: 16px;
        line-height: 1.75;
        color: var(--text-main);
        background: var(--bg-page);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        margin: 0;
        padding: 0;
    }

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

    a:hover {
        color: var(--primary-dark);
        text-decoration: none;
    }

    a:focus,
    button:focus,
    input:focus,
    textarea:focus {
        outline: 2px solid var(--primary);
        outline-offset: 2px;
    }

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

    button {
        font-family: var(--font-stack);
        cursor: pointer;
        border: none;
        background: none;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
    }

    /* Header */
    .site-header {
        background: var(--bg-white);
        border-bottom: 1px solid var(--border-light);
        box-shadow: 0 2px 12px rgba(18, 40, 80, 0.04);
        position: sticky;
        top: 0;
        z-index: 100;
    }

    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 14px 0;
        flex-wrap: wrap;
        gap: 12px;
    }

    .brand-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.45rem;
        font-weight: 700;
        color: var(--primary-dark);
        letter-spacing: 0.5px;
        white-space: nowrap;
    }

    .brand-logo i {
        font-size: 1.6rem;
        color: var(--accent-orange);
    }

    .brand-logo:hover {
        color: var(--primary-dark);
    }

    .desktop-nav {
        display: flex;
        align-items: center;
        gap: 6px;
        flex-wrap: wrap;
    }

    .desktop-nav .nav-link {
        display: inline-block;
        padding: 8px 16px;
        border-radius: var(--radius-sm);
        color: var(--text-muted);
        font-weight: 500;
        font-size: 0.95rem;
        transition: var(--transition);
        white-space: nowrap;
    }

    .desktop-nav .nav-link:hover {
        background: rgba(47, 111, 237, 0.06);
        color: var(--primary);
    }

    .desktop-nav .nav-link.active {
        background: rgba(47, 111, 237, 0.1);
        color: var(--primary);
        font-weight: 600;
    }

    .nav-cta {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 10px 22px;
        border-radius: 999px;
        background: var(--primary);
        color: #fff;
        font-weight: 600;
        font-size: 0.9rem;
        transition: var(--transition);
        white-space: nowrap;
        box-shadow: 0 4px 12px rgba(47, 111, 237, 0.25);
    }

    .nav-cta:hover {
        background: var(--primary-dark);
        color: #fff;
        box-shadow: 0 6px 16px rgba(47, 111, 237, 0.35);
        transform: translateY(-1px);
    }

    .nav-cta:active {
        transform: translateY(0);
        box-shadow: 0 2px 6px rgba(47, 111, 237, 0.25);
    }

    /* Mobile Tab Navigation */
    .mobile-tab-nav {
        display: none;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: var(--bg-white);
        border-top: 1px solid var(--border-light);
        box-shadow: 0 -4px 20px rgba(18, 40, 80, 0.08);
        z-index: 200;
        padding: 8px 4px 10px;
        justify-content: space-around;
        align-items: center;
    }

    .mobile-tab-nav .tab-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 3px;
        font-size: 0.72rem;
        color: var(--text-muted);
        padding: 6px 10px;
        border-radius: 10px;
        transition: var(--transition);
        min-width: 58px;
    }

    .mobile-tab-nav .tab-item i {
        font-size: 1.25rem;
    }

    .mobile-tab-nav .tab-item:hover {
        color: var(--primary);
        background: rgba(47, 111, 237, 0.05);
    }

    .mobile-tab-nav .tab-item.active {
        color: var(--primary);
        background: rgba(47, 111, 237, 0.08);
        font-weight: 600;
    }

    body.has-mobile-tab {
        padding-bottom: 72px;
    }

    /* Section Base */
    .section {
        padding: 64px 0;
        position: relative;
    }

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

    .section-grey {
        background: #F0F5FB;
    }

    .section-title-block {
        margin-bottom: 36px;
    }

    .section-tag {
        display: inline-block;
        padding: 5px 14px;
        border-radius: 999px;
        background: rgba(47, 111, 237, 0.08);
        color: var(--primary);
        font-size: 0.82rem;
        font-weight: 600;
        letter-spacing: 0.5px;
        margin-bottom: 10px;
    }

    .section-title-block h2 {
        font-size: 1.75rem;
        font-weight: 700;
        color: var(--text-main);
        margin: 0 0 8px;
        line-height: 1.4;
    }

    .section-title-block p {
        color: var(--text-muted);
        font-size: 0.98rem;
        margin: 0;
        max-width: 680px;
    }

    /* Breadcrumb */
    .breadcrumb-wrapper {
        padding: 28px 0 12px;
        background: var(--bg-white);
        border-bottom: 1px solid var(--border-light);
    }

    .breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 0.88rem;
        color: var(--text-muted);
        flex-wrap: wrap;
    }

    .breadcrumb a {
        color: var(--text-muted);
    }

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

    .breadcrumb .separator {
        color: #B0C0D4;
        font-size: 0.75rem;
    }

    .breadcrumb .current {
        color: var(--primary);
        font-weight: 600;
    }

    /* Compact Category H1 */
    .category-header {
        background: var(--bg-white);
        padding: 28px 0 36px;
        border-bottom: 1px solid var(--border-light);
    }

    .category-header h1 {
        font-size: 2rem;
        font-weight: 700;
        color: var(--text-main);
        margin: 0 0 10px;
        line-height: 1.35;
    }

    .category-header .intro-text {
        color: var(--text-muted);
        font-size: 0.98rem;
        max-width: 760px;
        margin: 0;
        line-height: 1.8;
    }

    /* Data Overview Cards */
    .overview-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 16px;
        margin-top: 24px;
    }

    .overview-stat {
        background: var(--bg-page);
        border: 1px solid var(--border-light);
        border-radius: var(--radius-md);
        padding: 18px 20px;
        text-align: center;
        transition: var(--transition);
    }

    .overview-stat:hover {
        box-shadow: var(--shadow-card);
        transform: translateY(-2px);
        background: var(--bg-white);
    }

    .overview-stat .stat-value {
        font-size: 1.65rem;
        font-weight: 700;
        color: var(--primary);
        line-height: 1.2;
        margin-bottom: 4px;
    }

    .overview-stat .stat-value.orange {
        color: var(--accent-orange);
    }

    .overview-stat .stat-value.cyan {
        color: var(--accent-cyan);
    }

    .overview-stat .stat-label {
        font-size: 0.82rem;
        color: var(--text-muted);
        font-weight: 500;
    }

    /* Match Data Cards */
    .match-data-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .match-card {
        background: var(--bg-white);
        border: 1px solid var(--border-light);
        border-radius: var(--radius-md);
        overflow: hidden;
        box-shadow: var(--shadow-card);
        transition: var(--transition);
        position: relative;
        display: flex;
        flex-direction: column;
    }

    .match-card:hover {
        box-shadow: var(--shadow-card-hover);
        transform: translateY(-2px);
    }

    .match-card .card-image {
        position: relative;
        height: 180px;
        overflow: hidden;
        background: #E8EEF6;
    }

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

    .match-card:hover .card-image img {
        transform: scale(1.03);
    }

    .match-card .badge-corner {
        position: absolute;
        top: 12px;
        left: 12px;
        padding: 4px 12px;
        border-radius: 999px;
        background: var(--accent-orange);
        color: #fff;
        font-size: 0.75rem;
        font-weight: 700;
        letter-spacing: 0.5px;
        box-shadow: 0 2px 8px rgba(255, 122, 26, 0.35);
    }

    .match-card .badge-corner.cyan {
        background: var(--accent-cyan);
        box-shadow: 0 2px 8px rgba(22, 184, 197, 0.35);
    }

    .match-card .card-body {
        padding: 20px 22px 22px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }

    .match-card .match-title {
        font-size: 1.1rem;
        font-weight: 700;
        color: var(--text-main);
        margin: 0 0 8px;
        line-height: 1.4;
    }

    .match-card .match-meta {
        display: flex;
        align-items: center;
        gap: 14px;
        flex-wrap: wrap;
        margin-bottom: 10px;
        font-size: 0.82rem;
        color: var(--text-muted);
    }

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

    .match-card .match-meta i {
        color: var(--primary);
        font-size: 0.8rem;
    }

    .match-card .match-desc {
        color: var(--text-muted);
        font-size: 0.9rem;
        line-height: 1.7;
        margin: 0 0 14px;
        flex: 1;
    }

    .match-card .btn-detail {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 8px 18px;
        border-radius: var(--radius-sm);
        background: rgba(47, 111, 237, 0.08);
        color: var(--primary);
        font-weight: 600;
        font-size: 0.85rem;
        transition: var(--transition);
        align-self: flex-start;
    }

    .match-card .btn-detail:hover {
        background: var(--primary);
        color: #fff;
    }

    /* Data List Rows */
    .data-list {
        display: flex;
        flex-direction: column;
        gap: 12px;
    }

    .data-row {
        display: flex;
        align-items: center;
        gap: 16px;
        background: var(--bg-white);
        border: 1px solid var(--border-light);
        border-radius: var(--radius-md);
        padding: 16px 20px;
        transition: var(--transition);
        flex-wrap: wrap;
    }

    .data-row:hover {
        box-shadow: var(--shadow-card);
        border-color: rgba(47, 111, 237, 0.3);
    }

    .data-row .row-score {
        display: flex;
        align-items: center;
        gap: 8px;
        font-weight: 700;
        font-size: 1.05rem;
        color: var(--text-main);
        min-width: 120px;
    }

    .data-row .row-score .score-sep {
        color: var(--accent-orange);
        font-weight: 800;
    }

    .data-row .row-info {
        flex: 1;
        min-width: 200px;
    }

    .data-row .row-info .team-name {
        font-weight: 600;
        color: var(--text-main);
        font-size: 0.95rem;
    }

    .data-row .row-info .row-meta {
        font-size: 0.8rem;
        color: var(--text-muted);
        margin-top: 2px;
    }

    .data-row .row-time {
        font-size: 0.82rem;
        color: var(--text-muted);
        white-space: nowrap;
    }

    .data-row .row-tag {
        padding: 3px 10px;
        border-radius: 999px;
        background: rgba(22, 184, 197, 0.1);
        color: var(--accent-cyan);
        font-size: 0.75rem;
        font-weight: 600;
        white-space: nowrap;
    }

    /* Data Explanation */
    .data-explain-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }

    .explain-card {
        background: var(--bg-white);
        border: 1px solid var(--border-light);
        border-radius: var(--radius-md);
        padding: 22px;
        transition: var(--transition);
    }

    .explain-card:hover {
        box-shadow: var(--shadow-card);
        transform: translateY(-2px);
    }

    .explain-card .explain-icon {
        width: 44px;
        height: 44px;
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.3rem;
        margin-bottom: 14px;
        background: rgba(47, 111, 237, 0.08);
        color: var(--primary);
    }

    .explain-card .explain-icon.orange {
        background: rgba(255, 122, 26, 0.1);
        color: var(--accent-orange);
    }

    .explain-card .explain-icon.cyan {
        background: rgba(22, 184, 197, 0.1);
        color: var(--accent-cyan);
    }

    .explain-card h3 {
        font-size: 1.02rem;
        font-weight: 700;
        color: var(--text-main);
        margin: 0 0 8px;
    }

    .explain-card p {
        font-size: 0.88rem;
        color: var(--text-muted);
        margin: 0;
        line-height: 1.7;
    }

    /* Rules Section */
    .rules-wrapper {
        background: var(--bg-white);
        border: 1px solid var(--border-light);
        border-radius: var(--radius-lg);
        padding: 28px 30px;
        box-shadow: var(--shadow-card);
    }

    .rules-wrapper h3 {
        font-size: 1.2rem;
        font-weight: 700;
        color: var(--text-main);
        margin: 0 0 16px;
    }

    .rules-list {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }

    .rules-list li {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        color: var(--text-main);
        font-size: 0.92rem;
        line-height: 1.7;
    }

    .rules-list li i {
        color: var(--accent-cyan);
        margin-top: 4px;
        font-size: 0.9rem;
    }

    /* Related Articles */
    .article-list {
        display: flex;
        flex-direction: column;
        gap: 16px;
    }

    .article-item {
        display: flex;
        gap: 18px;
        background: var(--bg-white);
        border: 1px solid var(--border-light);
        border-radius: var(--radius-md);
        padding: 16px 20px;
        transition: var(--transition);
        flex-wrap: wrap;
    }

    .article-item:hover {
        box-shadow: var(--shadow-card);
        transform: translateY(-1px);
    }

    .article-item .article-img {
        width: 140px;
        height: 90px;
        border-radius: var(--radius-sm);
        overflow: hidden;
        flex-shrink: 0;
        background: #E8EEF6;
    }

    .article-item .article-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    .article-item .article-content {
        flex: 1;
        min-width: 240px;
    }

    .article-item .article-content h4 {
        font-size: 0.98rem;
        font-weight: 700;
        color: var(--text-main);
        margin: 0 0 4px;
        line-height: 1.45;
    }

    .article-item .article-content .article-date {
        font-size: 0.78rem;
        color: var(--text-muted);
        margin-bottom: 6px;
    }

    .article-item .article-content .article-excerpt {
        font-size: 0.86rem;
        color: var(--text-muted);
        line-height: 1.65;
        margin: 0;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .article-item .btn-read {
        display: inline-flex;
        align-items: center;
        gap: 5px;
        font-size: 0.82rem;
        color: var(--primary);
        font-weight: 600;
        padding: 4px 0;
        margin-top: 6px;
        transition: var(--transition);
    }

    .article-item .btn-read:hover {
        color: var(--primary-dark);
    }

    /* FAQ */
    .faq-list {
        display: flex;
        flex-direction: column;
        gap: 10px;
        max-width: 820px;
    }

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

    .faq-item:hover {
        border-color: rgba(47, 111, 237, 0.25);
    }

    .faq-item summary {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        padding: 16px 20px;
        cursor: pointer;
        font-weight: 600;
        font-size: 0.95rem;
        color: var(--text-main);
        list-style: none;
        transition: var(--transition);
    }

    .faq-item summary::-webkit-details-marker {
        display: none;
    }

    .faq-item summary:hover {
        color: var(--primary);
        background: rgba(47, 111, 237, 0.03);
    }

    .faq-item summary .faq-icon {
        flex-shrink: 0;
        width: 24px;
        height: 24px;
        border-radius: 50%;
        background: rgba(47, 111, 237, 0.08);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 0.75rem;
        color: var(--primary);
        transition: var(--transition);
    }

    .faq-item[open] summary .faq-icon {
        transform: rotate(45deg);
        background: var(--primary);
        color: #fff;
    }

    .faq-item .faq-answer {
        padding: 0 20px 16px;
        font-size: 0.9rem;
        color: var(--text-muted);
        line-height: 1.75;
    }

    /* CTA Section */
    .cta-box {
        background: linear-gradient(135deg, #1E4FBF 0%, #2F6FED 55%, #3D7DF0 100%);
        border-radius: var(--radius-lg);
        padding: 40px 36px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 24px;
        flex-wrap: wrap;
        position: relative;
        overflow: hidden;
        box-shadow: 0 8px 28px rgba(30, 79, 191, 0.28);
    }

    .cta-box::before {
        content: '';
        position: absolute;
        right: -60px;
        top: -60px;
        width: 220px;
        height: 220px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.06);
        pointer-events: none;
    }

    .cta-box::after {
        content: '';
        position: absolute;
        right: 40px;
        bottom: -80px;
        width: 180px;
        height: 180px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.04);
        pointer-events: none;
    }

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

    .cta-box .cta-content .cta-badge {
        display: inline-block;
        padding: 4px 12px;
        border-radius: 999px;
        background: rgba(255, 122, 26, 0.9);
        color: #fff;
        font-size: 0.75rem;
        font-weight: 700;
        letter-spacing: 0.5px;
        margin-bottom: 10px;
    }

    .cta-box .cta-content h2 {
        font-size: 1.45rem;
        font-weight: 700;
        color: #fff;
        margin: 0 0 8px;
        line-height: 1.4;
    }

    .cta-box .cta-content p {
        color: rgba(255, 255, 255, 0.85);
        font-size: 0.92rem;
        margin: 0;
        max-width: 520px;
        line-height: 1.7;
    }

    .cta-box .cta-btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 13px 28px;
        border-radius: 999px;
        background: var(--accent-orange);
        color: #fff;
        font-weight: 700;
        font-size: 0.92rem;
        transition: var(--transition);
        white-space: nowrap;
        box-shadow: 0 4px 16px rgba(255, 122, 26, 0.4);
        position: relative;
        z-index: 1;
    }

    .cta-box .cta-btn:hover {
        background: #E96A0D;
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(255, 122, 26, 0.5);
    }

    .cta-box .cta-btn:active {
        transform: translateY(0);
        box-shadow: 0 2px 8px rgba(255, 122, 26, 0.35);
    }

    /* Footer */
    .site-footer {
        background: #0F1E35;
        color: rgba(255, 255, 255, 0.7);
        padding: 52px 0 0;
        margin-top: 0;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 32px;
        padding-bottom: 32px;
    }

    .footer-brand .brand-logo {
        color: #fff;
        margin-bottom: 12px;
    }

    .footer-brand .brand-logo:hover {
        color: #fff;
    }

    .footer-brand p {
        font-size: 0.88rem;
        line-height: 1.75;
        margin: 0;
        color: rgba(255, 255, 255, 0.55);
        max-width: 320px;
    }

    .footer-col h4 {
        font-size: 0.9rem;
        font-weight: 700;
        color: #fff;
        margin: 0 0 14px;
        letter-spacing: 0.5px;
    }

    .footer-col ul {
        list-style: none;
        padding: 0;
        margin: 0;
    }

    .footer-col ul li {
        margin-bottom: 8px;
    }

    .footer-col ul li a {
        color: rgba(255, 255, 255, 0.55);
        font-size: 0.86rem;
        transition: var(--transition);
    }

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

    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding: 18px 0;
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 8px;
        font-size: 0.8rem;
        color: rgba(255, 255, 255, 0.45);
    }

    .footer-bottom .footer-links {
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .footer-bottom .footer-links a {
        color: rgba(255, 255, 255, 0.55);
        font-size: 0.8rem;
    }

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

    .footer-bottom .footer-links span {
        color: rgba(255, 255, 255, 0.25);
    }

    /* Responsive */
    @media (max-width: 1023px) {
        .section {
            padding: 48px 0;
        }

        .overview-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
        }

        .match-data-grid {
            grid-template-columns: 1fr;
            gap: 16px;
        }

        .data-explain-grid {
            grid-template-columns: 1fr 1fr;
            gap: 14px;
        }

        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .category-header h1 {
            font-size: 1.6rem;
        }
    }

    @media (max-width: 767px) {
        .desktop-nav {
            display: none;
        }

        .nav-cta {
            display: none;
        }

        .mobile-tab-nav {
            display: flex;
        }

        body.has-mobile-tab {
            padding-bottom: 72px;
        }

        .header-inner {
            padding: 10px 0;
        }

        .brand-logo {
            font-size: 1.2rem;
        }

        .category-header {
            padding: 20px 0 28px;
        }

        .category-header h1 {
            font-size: 1.45rem;
        }

        .section {
            padding: 36px 0;
        }

        .section-title-block h2 {
            font-size: 1.35rem;
        }

        .overview-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 10px;
        }

        .overview-stat {
            padding: 14px 12px;
        }

        .overview-stat .stat-value {
            font-size: 1.3rem;
        }

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

        .match-card .card-image {
            height: 150px;
        }

        .match-card .card-body {
            padding: 16px 16px 18px;
        }

        .article-item {
            flex-direction: column;
            gap: 12px;
            padding: 14px;
        }

        .article-item .article-img {
            width: 100%;
            height: 150px;
        }

        .cta-box {
            padding: 28px 20px;
            flex-direction: column;
            align-items: flex-start;
            gap: 18px;
        }

        .cta-box .cta-content h2 {
            font-size: 1.2rem;
        }

        .footer-grid {
            grid-template-columns: 1fr;
            gap: 20px;
        }

        .footer-bottom {
            flex-direction: column;
            text-align: center;
        }

        .data-row {
            padding: 12px 14px;
            gap: 10px;
        }

        .data-row .row-score {
            min-width: auto;
            font-size: 0.95rem;
        }

        .rules-wrapper {
            padding: 20px 18px;
        }
    }

    @media (min-width: 768px) and (max-width: 1023px) {
        .desktop-nav .nav-link {
            padding: 6px 10px;
            font-size: 0.85rem;
        }

        .nav-cta {
            padding: 8px 16px;
            font-size: 0.82rem;
        }
    }

    @media (min-width: 1024px) {
        body.has-mobile-tab {
            padding-bottom: 0;
        }
    }

/* roulang page: category2 */
:root {
            --primary: #2F6FED;
            --primary-dark: #1E4FBF;
            --accent-orange: #FF7A1A;
            --accent-cyan: #16B8C5;
            --bg-page: #F7FAFD;
            --bg-white: #FFFFFF;
            --text-main: #16304D;
            --text-muted: #6B7F99;
            --border-light: #E6EEF6;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-card: 0 6px 18px rgba(18, 40, 80, 0.06);
            --shadow-card-hover: 0 10px 28px rgba(18, 40, 80, 0.12);
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Source Han Sans SC', 'Noto Sans CJK SC', sans-serif;
            --transition: all 0.25s ease;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-main);
            background: var(--bg-page);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
        }

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

        a:hover {
            color: var(--primary-dark);
            text-decoration: none;
        }

        a:focus,
        button:focus,
        input:focus,
        textarea:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

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

        button {
            font-family: var(--font-stack);
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 2px 12px rgba(18, 40, 80, 0.04);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            flex-wrap: wrap;
            gap: 12px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .brand-logo i {
            font-size: 1.6rem;
            color: var(--accent-orange);
        }

        .brand-logo:hover {
            color: var(--primary-dark);
        }

        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }

        .desktop-nav .nav-link {
            display: inline-block;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            white-space: nowrap;
        }

        .desktop-nav .nav-link:hover {
            background: rgba(47, 111, 237, 0.06);
            color: var(--primary);
        }

        .desktop-nav .nav-link.active {
            background: rgba(47, 111, 237, 0.1);
            color: var(--primary);
            font-weight: 600;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 999px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            white-space: nowrap;
            box-shadow: 0 4px 12px rgba(47, 111, 237, 0.25);
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 6px 16px rgba(47, 111, 237, 0.35);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(47, 111, 237, 0.25);
        }

        .mobile-tab-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: var(--bg-white);
            border-top: 1px solid var(--border-light);
            box-shadow: 0 -4px 20px rgba(18, 40, 80, 0.08);
            z-index: 200;
            padding: 8px 4px 10px;
            justify-content: space-around;
            align-items: center;
        }

        .mobile-tab-nav .tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 3px;
            font-size: 0.72rem;
            color: var(--text-muted);
            padding: 6px 10px;
            border-radius: 10px;
            transition: var(--transition);
            min-width: 58px;
        }

        .mobile-tab-nav .tab-item i {
            font-size: 1.25rem;
        }

        .mobile-tab-nav .tab-item:hover {
            color: var(--primary);
            background: rgba(47, 111, 237, 0.05);
        }

        .mobile-tab-nav .tab-item.active {
            color: var(--primary);
            background: rgba(47, 111, 237, 0.08);
            font-weight: 600;
        }

        body.has-mobile-tab {
            padding-bottom: 72px;
        }

        /* Section Base */
        .section {
            padding: 56px 0;
            position: relative;
        }

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

        .section-grey {
            background: #F0F5FB;
        }

        .section-title-block {
            margin-bottom: 32px;
        }

        .section-tag {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 999px;
            background: rgba(47, 111, 237, 0.08);
            color: var(--primary);
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 10px;
        }

        .section-title-block h2 {
            font-size: 1.85rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 8px;
            line-height: 1.4;
        }

        .section-title-block .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            margin: 0;
            max-width: 720px;
        }

        .section-title-block.with-divider {
            border-bottom: 1px solid var(--border-light);
            padding-bottom: 20px;
        }

        /* Breadcrumb */
        .breadcrumb-wrap {
            padding: 20px 0 0;
            background: var(--bg-page);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: var(--text-muted);
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .breadcrumb li {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .breadcrumb li:not(:last-child)::after {
            content: '/';
            color: #B4C5D8;
            font-size: 0.85rem;
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: var(--transition);
        }

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

        .breadcrumb li:last-child {
            color: var(--text-main);
            font-weight: 600;
        }

        /* Page header compact */
        .page-head-compact {
            padding: 24px 0 16px;
        }

        .page-head-compact h1 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 8px;
            line-height: 1.35;
        }

        .page-head-compact .page-head-desc {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin: 0;
            max-width: 760px;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 11px 24px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            font-family: var(--font-stack);
            line-height: 1.5;
            text-align: center;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(47, 111, 237, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 6px 16px rgba(47, 111, 237, 0.35);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(47, 111, 237, 0.25);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--border-light);
            box-shadow: none;
        }

        .btn-outline:hover {
            background: rgba(47, 111, 237, 0.06);
            color: var(--primary-dark);
            border-color: rgba(47, 111, 237, 0.3);
            transform: translateY(-1px);
        }

        .btn-ghost {
            background: rgba(47, 111, 237, 0.06);
            color: var(--primary);
            padding: 8px 18px;
            font-size: 0.85rem;
        }

        .btn-ghost:hover {
            background: rgba(47, 111, 237, 0.12);
            color: var(--primary-dark);
        }

        .btn-sm {
            padding: 7px 16px;
            font-size: 0.8rem;
        }

        .btn-lg {
            padding: 14px 32px;
            font-size: 1rem;
        }

        /* Filter chips */
        .filter-chips {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 0;
        }

        .filter-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            border-radius: 999px;
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.85rem;
            transition: var(--transition);
            cursor: pointer;
            font-family: var(--font-stack);
            white-space: nowrap;
        }

        .filter-chip:hover {
            border-color: rgba(47, 111, 237, 0.4);
            color: var(--primary);
            background: rgba(47, 111, 237, 0.04);
        }

        .filter-chip.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(47, 111, 237, 0.22);
        }

        .filter-chip i {
            font-size: 0.8rem;
        }

        /* Cards */
        .card {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            overflow: hidden;
            height: 100%;
        }

        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .card-body {
            padding: 24px;
        }

        .card-body .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 8px;
            line-height: 1.45;
        }

        .card-body .card-title a {
            color: var(--text-main);
            transition: var(--transition);
        }

        .card-body .card-title a:hover {
            color: var(--primary);
        }

        .card-body .card-text {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.7;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 10px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .badge {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 999px;
            font-size: 0.72rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            background: rgba(47, 111, 237, 0.08);
            color: var(--primary);
        }

        .badge-orange {
            background: rgba(255, 122, 26, 0.12);
            color: var(--accent-orange);
        }

        .badge-cyan {
            background: rgba(22, 184, 197, 0.1);
            color: var(--accent-cyan);
        }

        .badge-grey {
            background: rgba(107, 127, 153, 0.12);
            color: var(--text-muted);
        }

        /* Featured large card */
        .featured-card {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            transition: var(--transition);
        }

        .featured-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .featured-card .featured-img {
            min-height: 100%;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .featured-card .featured-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 300px;
        }

        .featured-card .featured-content {
            padding: 28px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .featured-card .featured-content h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin: 0 0 10px;
            color: var(--text-main);
            line-height: 1.45;
        }

        .featured-card .featured-content p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin: 0 0 16px;
            line-height: 1.75;
        }

        /* Mini cards */
        .mini-card {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 16px;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            height: 100%;
        }

        .mini-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .mini-card .mini-thumb {
            flex-shrink: 0;
            width: 80px;
            height: 80px;
            border-radius: var(--radius-sm);
            overflow: hidden;
        }

        .mini-card .mini-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .mini-card .mini-info h4 {
            font-size: 0.92rem;
            font-weight: 700;
            margin: 0 0 4px;
            color: var(--text-main);
            line-height: 1.4;
        }

        .mini-card .mini-info h4 a {
            color: var(--text-main);
            transition: var(--transition);
        }

        .mini-card .mini-info h4 a:hover {
            color: var(--primary);
        }

        .mini-card .mini-info p {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.55;
        }

        /* List row card */
        .list-row-card {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            margin-bottom: 14px;
        }

        .list-row-card:last-child {
            margin-bottom: 0;
        }

        .list-row-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .list-row-card .list-thumb {
            flex-shrink: 0;
            width: 140px;
            height: 100px;
            border-radius: var(--radius-sm);
            overflow: hidden;
        }

        .list-row-card .list-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .list-row-card .list-content {
            flex: 1;
            min-width: 0;
        }

        .list-row-card .list-content h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin: 0 0 6px;
            color: var(--text-main);
            line-height: 1.4;
        }

        .list-row-card .list-content h3 a {
            color: var(--text-main);
            transition: var(--transition);
        }

        .list-row-card .list-content h3 a:hover {
            color: var(--primary);
        }

        .list-row-card .list-content p {
            font-size: 0.86rem;
            color: var(--text-muted);
            margin: 0 0 10px;
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .list-row-card .list-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
        }

        .list-row-card .list-footer .read-more {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: var(--transition);
        }

        .list-row-card .list-footer .read-more:hover {
            color: var(--primary-dark);
            gap: 6px;
        }

        /* Data strip */
        .data-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .data-item {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 20px;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }

        .data-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .data-item .data-value {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 4px;
        }

        .data-item .data-value.orange {
            color: var(--accent-orange);
        }

        .data-item .data-value.cyan {
            color: var(--accent-cyan);
        }

        .data-item .data-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* Timeline / version list */
        .version-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .version-item {
            display: flex;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-light);
            align-items: flex-start;
        }

        .version-item:last-child {
            border-bottom: none;
        }

        .version-item .version-date {
            flex-shrink: 0;
            width: 90px;
            text-align: center;
            background: rgba(47, 111, 237, 0.06);
            border-radius: var(--radius-sm);
            padding: 6px 8px;
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--primary);
            line-height: 1.4;
        }

        .version-item .version-info h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin: 0 0 4px;
            color: var(--text-main);
            line-height: 1.4;
        }

        .version-item .version-info p {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }

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

        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(18, 40, 80, 0.04);
            transition: var(--transition);
        }

        .faq-item:hover {
            box-shadow: 0 4px 12px rgba(18, 40, 80, 0.08);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            cursor: pointer;
            gap: 12px;
            font-weight: 600;
            font-size: 0.92rem;
            color: var(--text-main);
            transition: var(--transition);
            font-family: var(--font-stack);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            line-height: 1.55;
        }

        .faq-question:hover {
            background: rgba(47, 111, 237, 0.04);
            color: var(--primary);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(47, 111, 237, 0.06);
            color: var(--primary);
            font-size: 0.85rem;
            transition: var(--transition);
        }

        .faq-answer {
            padding: 0 20px 18px;
            font-size: 0.86rem;
            color: var(--text-muted);
            line-height: 1.75;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            background: var(--primary);
            color: #fff;
        }

        /* CTA form */
        .cta-box {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-card);
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-box h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin: 0 0 6px;
            color: var(--text-main);
            line-height: 1.4;
        }

        .cta-box p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin: 0 0 18px;
        }

        .form-field {
            margin-bottom: 14px;
        }

        .form-field label {
            display: block;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 5px;
        }

        .form-field input,
        .form-field textarea {
            width: 100%;
            padding: 11px 16px;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            font-family: var(--font-stack);
            font-size: 0.9rem;
            color: var(--text-main);
            background: var(--bg-page);
            transition: var(--transition);
        }

        .form-field input:focus,
        .form-field textarea:focus {
            border-color: var(--primary);
            background: #fff;
            outline: 2px solid rgba(47, 111, 237, 0.2);
            outline-offset: 0;
        }

        .form-submit {
            margin-top: 18px;
        }

        /* Footer */
        .site-footer {
            background: #0E1B2E;
            color: #B4C5D8;
            padding: 48px 0 20px;
            font-size: 0.85rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.3fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 28px;
        }

        .footer-brand .brand-logo {
            font-size: 1.3rem;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand .brand-logo i {
            color: var(--accent-orange);
        }

        .footer-brand p {
            font-size: 0.82rem;
            line-height: 1.7;
            color: #8FA3BC;
            margin: 0;
            max-width: 280px;
        }

        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 14px;
            letter-spacing: 0.4px;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            color: #8FA3BC;
            font-size: 0.82rem;
            transition: var(--transition);
        }

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 18px;
            font-size: 0.78rem;
            color: #7A90A8;
        }

        .footer-links {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-links a {
            color: #8FA3BC;
            font-size: 0.78rem;
            transition: var(--transition);
        }

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

        .footer-links span {
            color: #546E8A;
        }

        /* Responsive Grid Overrides */
        .grid-gap-sm {
            display: grid;
            gap: 16px;
        }

        .grid-2-col {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .grid-3-col {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .grid-asym {
            display: grid;
            grid-template-columns: 1.3fr 1fr;
            gap: 18px;
        }

        /* Responsive breakpoints */
        @media (max-width: 1023px) {
            .desktop-nav {
                display: none;
            }

            .nav-cta {
                display: none;
            }

            .mobile-tab-nav {
                display: flex;
            }

            .header-inner {
                justify-content: center;
                padding: 10px 0;
            }

            .section {
                padding: 40px 0;
            }

            .section-title-block h2 {
                font-size: 1.5rem;
            }

            .page-head-compact h1 {
                font-size: 1.6rem;
            }

            .featured-card {
                grid-template-columns: 1fr;
            }

            .featured-card .featured-img img {
                min-height: 200px;
                max-height: 260px;
            }

            .featured-card .featured-content {
                padding: 20px;
            }

            .data-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }

            .grid-3-col {
                grid-template-columns: 1fr 1fr;
            }

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

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }

            .list-row-card {
                flex-direction: column;
            }

            .list-row-card .list-thumb {
                width: 100%;
                height: 160px;
            }
        }

        @media (max-width: 639px) {
            .container {
                padding: 0 16px;
            }

            .section {
                padding: 32px 0;
            }

            .section-title-block h2 {
                font-size: 1.25rem;
            }

            .page-head-compact h1 {
                font-size: 1.35rem;
            }

            .page-head-compact {
                padding: 16px 0 8px;
            }

            .filter-chips {
                gap: 8px;
            }

            .filter-chip {
                padding: 6px 14px;
                font-size: 0.75rem;
            }

            .data-strip {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }

            .data-item .data-value {
                font-size: 1.3rem;
            }

            .data-item .data-label {
                font-size: 0.7rem;
            }

            .grid-3-col {
                grid-template-columns: 1fr;
            }

            .grid-2-col {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }

            .cta-box {
                padding: 20px;
            }

            .list-row-card .list-footer {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }

            .mini-card {
                flex-direction: row;
            }

            .mini-card .mini-thumb {
                width: 64px;
                height: 64px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2F6FED;
            --primary-dark: #1E4FBF;
            --accent-orange: #FF7A1A;
            --accent-cyan: #16B8C5;
            --bg-page: #F7FAFD;
            --bg-white: #FFFFFF;
            --text-main: #16304D;
            --text-muted: #6B7F99;
            --border-light: #E6EEF6;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-card: 0 6px 18px rgba(18, 40, 80, 0.06);
            --shadow-card-hover: 0 10px 28px rgba(18, 40, 80, 0.12);
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Source Han Sans SC', 'Noto Sans CJK SC', sans-serif;
            --transition: all 0.25s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-main);
            background: var(--bg-page);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
            text-decoration: none;
        }
        a:focus,
        button:focus,
        input:focus,
        textarea:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            font-family: var(--font-stack);
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 2px 12px rgba(18, 40, 80, 0.04);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            flex-wrap: wrap;
            gap: 12px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .brand-logo i {
            font-size: 1.6rem;
            color: var(--accent-orange);
        }
        .brand-logo:hover {
            color: var(--primary-dark);
        }
        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .desktop-nav .nav-link {
            display: inline-block;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            white-space: nowrap;
        }
        .desktop-nav .nav-link:hover {
            background: rgba(47, 111, 237, 0.06);
            color: var(--primary);
        }
        .desktop-nav .nav-link.active {
            background: rgba(47, 111, 237, 0.1);
            color: var(--primary);
            font-weight: 600;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 999px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            white-space: nowrap;
            box-shadow: 0 4px 12px rgba(47, 111, 237, 0.25);
        }
        .nav-cta:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 6px 16px rgba(47, 111, 237, 0.35);
            transform: translateY(-1px);
        }
        .nav-cta:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(47, 111, 237, 0.25);
        }

        /* Mobile Tab Navigation */
        .mobile-tab-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: var(--bg-white);
            border-top: 1px solid var(--border-light);
            box-shadow: 0 -4px 20px rgba(18, 40, 80, 0.08);
            z-index: 200;
            padding: 8px 4px 10px;
            justify-content: space-around;
            align-items: center;
        }
        .mobile-tab-nav .tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 3px;
            font-size: 0.72rem;
            color: var(--text-muted);
            padding: 6px 10px;
            border-radius: 10px;
            transition: var(--transition);
            min-width: 58px;
        }
        .mobile-tab-nav .tab-item i {
            font-size: 1.25rem;
        }
        .mobile-tab-nav .tab-item:hover {
            color: var(--primary);
            background: rgba(47, 111, 237, 0.05);
        }
        .mobile-tab-nav .tab-item.active {
            color: var(--primary);
            background: rgba(47, 111, 237, 0.08);
            font-weight: 600;
        }

        /* Section Base */
        .section {
            padding: 60px 0;
            position: relative;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-grey {
            background: #F0F5FB;
        }
        .section-tag {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 999px;
            background: rgba(47, 111, 237, 0.08);
            color: var(--primary);
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 10px;
        }
        .section-title-block h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 8px;
            line-height: 1.4;
        }
        .section-title-block .section-sub {
            color: var(--text-muted);
            font-size: 1rem;
            margin: 0;
            max-width: 720px;
        }

        /* Breadcrumb */
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .breadcrumb-custom a {
            color: var(--text-muted);
        }
        .breadcrumb-custom a:hover {
            color: var(--primary);
        }
        .breadcrumb-custom .separator {
            color: #B0C4DE;
            user-select: none;
        }
        .breadcrumb-custom .current {
            color: var(--primary);
            font-weight: 600;
        }

        /* Page header compact */
        .page-header-compact {
            padding: 32px 0 20px;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
        }
        .page-header-compact h1 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 6px;
            line-height: 1.4;
        }
        .page-header-compact .page-intro {
            color: var(--text-muted);
            font-size: 1rem;
            max-width: 760px;
            margin: 0;
        }

        /* News list */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .news-item {
            display: flex;
            flex-wrap: wrap;
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition);
        }
        .news-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .news-thumb {
            flex: 0 0 280px;
            max-width: 280px;
            position: relative;
            overflow: hidden;
            min-height: 200px;
        }
        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .news-item:hover .news-thumb img {
            transform: scale(1.04);
        }
        .news-date-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            display: inline-block;
            padding: 4px 12px;
            border-radius: 6px;
            background: rgba(18, 40, 80, 0.75);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            backdrop-filter: blur(4px);
        }
        .news-content {
            flex: 1;
            min-width: 0;
            padding: 20px 24px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .news-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .news-tag {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 999px;
            background: rgba(47, 111, 237, 0.07);
            color: var(--primary);
            font-size: 0.78rem;
            font-weight: 600;
        }
        .news-content h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0;
            line-height: 1.45;
        }
        .news-content h3 a {
            color: var(--text-main);
        }
        .news-content h3 a:hover {
            color: var(--primary);
        }
        .news-content .news-summary {
            color: var(--text-muted);
            font-size: 0.92rem;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.7;
        }
        .btn-read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
            margin-top: auto;
            transition: var(--transition);
            align-self: flex-start;
        }
        .btn-read-more:hover {
            color: var(--primary-dark);
            gap: 10px;
        }

        /* Filter tags */
        .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 0;
        }
        .filter-tag {
            display: inline-block;
            padding: 7px 18px;
            border-radius: 999px;
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            color: var(--text-muted);
            font-size: 0.88rem;
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
        }
        .filter-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .filter-tag.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            font-weight: 600;
        }

        /* Data snapshot strip */
        .data-snapshot {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: stretch;
        }
        .snapshot-card {
            flex: 1 1 200px;
            min-width: 160px;
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            padding: 18px 20px;
            text-align: center;
            transition: var(--transition);
        }
        .snapshot-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .snapshot-number {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }
        .snapshot-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* Guide recommendation */
        .guide-reco {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
        }
        .guide-card-sm {
            flex: 1 1 260px;
            min-width: 0;
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition);
        }
        .guide-card-sm:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .guide-card-sm .guide-thumb {
            position: relative;
            height: 170px;
            overflow: hidden;
        }
        .guide-card-sm .guide-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .guide-card-sm:hover .guide-thumb img {
            transform: scale(1.05);
        }
        .guide-card-sm .guide-body {
            padding: 16px 18px;
        }
        .guide-card-sm .guide-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 6px;
        }
        .guide-card-sm .guide-body p {
            color: var(--text-muted);
            font-size: 0.88rem;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
            max-width: 820px;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: #D0E0F2;
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 18px 22px;
            cursor: pointer;
            background: none;
            border: none;
            text-align: left;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(47, 111, 237, 0.08);
            color: var(--primary);
            font-size: 0.85rem;
            transition: var(--transition);
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 22px;
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }

        /* CTA subscribe */
        .cta-panel {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: 36px 32px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .cta-panel .cta-text h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 6px;
        }
        .cta-panel .cta-text p {
            color: var(--text-muted);
            margin: 0;
        }
        .cta-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .cta-form input {
            flex: 1 1 240px;
            min-width: 200px;
            padding: 11px 18px;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-family: var(--font-stack);
            transition: var(--transition);
            background: var(--bg-page);
        }
        .cta-form input:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 2px rgba(47, 111, 237, 0.15);
            background: #fff;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 11px 26px;
            border-radius: 999px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.92rem;
            transition: var(--transition);
            white-space: nowrap;
            box-shadow: 0 4px 12px rgba(47, 111, 237, 0.25);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 6px 16px rgba(47, 111, 237, 0.35);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(47, 111, 237, 0.25);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 999px;
            background: transparent;
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
            border: 1px solid var(--primary);
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-outline:hover {
            background: rgba(47, 111, 237, 0.06);
            color: var(--primary-dark);
        }

        /* Footer */
        .site-footer {
            background: #132A45;
            color: #B8C9DC;
            padding: 48px 0 20px;
            margin-top: 0;
        }
        .footer-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            margin-bottom: 28px;
        }
        .footer-brand {
            flex: 1 1 260px;
            min-width: 240px;
        }
        .footer-brand .brand-logo {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 12px;
        }
        .footer-brand .brand-logo i {
            color: var(--accent-orange);
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: #9FB3C8;
            margin: 0;
            line-height: 1.7;
        }
        .footer-col {
            flex: 1 1 140px;
            min-width: 120px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin: 0 0 12px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 6px;
        }
        .footer-col ul li a {
            color: #9FB3C8;
            font-size: 0.88rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.82rem;
            color: #8FA5BC;
        }
        .footer-links a {
            color: #8FA5BC;
        }
        .footer-links a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1023px) {
            .news-thumb {
                flex: 0 0 220px;
                max-width: 220px;
            }
            .section {
                padding: 48px 0;
            }
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .mobile-tab-nav {
                display: flex;
            }
            body {
                padding-bottom: 72px;
            }
            .nav-cta {
                display: none;
            }
            .page-header-compact {
                padding: 24px 0 14px;
            }
            .page-header-compact h1 {
                font-size: 1.6rem;
            }
            .news-thumb {
                flex: 0 0 100%;
                max-width: 100%;
                min-height: 180px;
            }
            .news-content {
                padding: 16px 18px;
            }
            .section {
                padding: 40px 0;
            }
            .cta-panel {
                padding: 24px 18px;
            }
            .footer-grid {
                gap: 20px;
            }
            .footer-brand {
                flex: 1 1 100%;
            }
        }
        @media (max-width: 520px) {
            .news-thumb {
                min-height: 150px;
            }
            .data-snapshot {
                gap: 12px;
            }
            .snapshot-card {
                flex: 1 1 45%;
                min-width: 120px;
                padding: 14px 12px;
            }
            .snapshot-number {
                font-size: 1.4rem;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-answer {
                padding: 0 16px;
                font-size: 0.85rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 14px;
            }
            .cta-form input {
                flex: 1 1 100%;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #2F6FED;
            --primary-dark: #1E4FBF;
            --accent-orange: #FF7A1A;
            --accent-cyan: #16B8C5;
            --bg-page: #F7FAFD;
            --bg-white: #FFFFFF;
            --text-main: #16304D;
            --text-muted: #6B7F99;
            --border-light: #E6EEF6;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-card: 0 6px 18px rgba(18, 40, 80, 0.06);
            --shadow-card-hover: 0 10px 28px rgba(18, 40, 80, 0.12);
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Source Han Sans SC', 'Noto Sans CJK SC', sans-serif;
            --transition: all 0.25s ease;
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-main);
            background: var(--bg-page);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
            text-decoration: none;
        }
        a:focus,
        button:focus,
        input:focus,
        textarea:focus,
        select:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            font-family: var(--font-stack);
            cursor: pointer;
            border: none;
            background: none;
        }
        h1, h2, h3, h4, h5, h6 {
            color: var(--text-main);
            font-weight: 700;
            line-height: 1.35;
            margin: 0 0 12px;
        }
        p {
            margin: 0 0 12px;
        }
        ul, ol {
            margin: 0 0 12px;
            padding-left: 20px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .section {
            padding: 56px 0;
            position: relative;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-grey {
            background: #F0F5FB;
        }
        .section-tag {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 999px;
            background: rgba(47, 111, 237, 0.08);
            color: var(--primary);
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 10px;
        }
        .section-title-block {
            margin-bottom: 32px;
        }
        .section-title-block h2 {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .section-title-block p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 0;
        }
        .card {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(47, 111, 237, 0.25);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 6px 16px rgba(47, 111, 237, 0.35);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(47, 111, 237, 0.25);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-accent {
            background: var(--accent-orange);
            color: #fff;
            box-shadow: 0 4px 12px rgba(255, 122, 26, 0.25);
        }
        .btn-accent:hover {
            background: #E86A0D;
            color: #fff;
            box-shadow: 0 6px 16px rgba(255, 122, 26, 0.35);
            transform: translateY(-1px);
        }
        .badge {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .badge-blue {
            background: rgba(47, 111, 237, 0.1);
            color: var(--primary);
        }
        .badge-orange {
            background: rgba(255, 122, 26, 0.1);
            color: var(--accent-orange);
        }
        .badge-cyan {
            background: rgba(22, 184, 197, 0.1);
            color: var(--accent-cyan);
        }
        .divider {
            height: 1px;
            background: var(--border-light);
            border: none;
            margin: 20px 0;
        }
        .header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 2px 12px rgba(18, 40, 80, 0.04);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            flex-wrap: wrap;
            gap: 12px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .brand-logo i {
            font-size: 1.6rem;
            color: var(--accent-orange);
        }
        .brand-logo:hover {
            color: var(--primary-dark);
        }
        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .desktop-nav .nav-link {
            display: inline-block;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            white-space: nowrap;
        }
        .desktop-nav .nav-link:hover {
            background: rgba(47, 111, 237, 0.06);
            color: var(--primary);
        }
        .desktop-nav .nav-link.active {
            background: rgba(47, 111, 237, 0.1);
            color: var(--primary);
            font-weight: 600;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 999px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            white-space: nowrap;
            box-shadow: 0 4px 12px rgba(47, 111, 237, 0.25);
        }
        .nav-cta:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 6px 16px rgba(47, 111, 237, 0.35);
            transform: translateY(-1px);
        }
        .nav-cta:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(47, 111, 237, 0.25);
        }
        .mobile-tab-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: var(--bg-white);
            border-top: 1px solid var(--border-light);
            box-shadow: 0 -4px 20px rgba(18, 40, 80, 0.08);
            z-index: 200;
            padding: 8px 4px 10px;
            justify-content: space-around;
            align-items: center;
        }
        .mobile-tab-nav .tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 3px;
            font-size: 0.72rem;
            color: var(--text-muted);
            padding: 6px 10px;
            border-radius: 10px;
            transition: var(--transition);
            min-width: 58px;
            text-decoration: none;
        }
        .mobile-tab-nav .tab-item i {
            font-size: 1.25rem;
        }
        .mobile-tab-nav .tab-item:hover {
            color: var(--primary);
            background: rgba(47, 111, 237, 0.05);
        }
        .mobile-tab-nav .tab-item.active {
            color: var(--primary);
            background: rgba(47, 111, 237, 0.08);
            font-weight: 600;
        }
        body.has-mobile-tab {
            padding-bottom: 72px;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 0.88rem;
            color: var(--text-muted);
            padding: 16px 0;
            margin-bottom: 0;
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .separator {
            color: #C0CCDA;
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 500;
        }
        .page-header-compact {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            padding: 12px 0 16px;
        }
        .page-header-compact h1 {
            font-size: 1.9rem;
            font-weight: 700;
            margin: 0 0 6px;
        }
        .page-header-compact .page-subtitle {
            color: var(--text-muted);
            font-size: 0.92rem;
            margin: 0;
        }
        .support-hero-card {
            background: linear-gradient(135deg, #F7FAFD 0%, #EEF4FD 50%, #E9F0FC 100%);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 32px 36px;
            display: flex;
            align-items: center;
            gap: 28px;
            flex-wrap: wrap;
        }
        .support-hero-card .hero-text {
            flex: 1;
            min-width: 260px;
        }
        .support-hero-card .hero-text h2 {
            font-size: 1.5rem;
            margin-bottom: 10px;
        }
        .support-hero-card .hero-text p {
            color: var(--text-muted);
            margin-bottom: 16px;
            font-size: 0.95rem;
        }
        .support-hero-card .hero-image {
            flex: 0 0 320px;
            max-width: 100%;
        }
        .support-hero-card .hero-image img {
            border-radius: var(--radius-md);
            object-fit: cover;
            width: 100%;
            height: 200px;
        }
        .download-panel {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .download-card {
            padding: 24px 28px;
            text-align: left;
            position: relative;
        }
        .download-card .download-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .download-card h3 {
            font-size: 1.15rem;
            margin-bottom: 6px;
        }
        .download-card p {
            color: var(--text-muted);
            font-size: 0.88rem;
            margin-bottom: 16px;
        }
        .download-card .version-info {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 16px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .security-step-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 20px;
        }
        .security-step {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 22px 20px;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .security-step:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .security-step .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 0.9rem;
            margin-bottom: 12px;
        }
        .security-step h4 {
            font-size: 1rem;
            margin-bottom: 6px;
        }
        .security-step p {
            color: var(--text-muted);
            font-size: 0.85rem;
            margin-bottom: 0;
        }
        .faq-list {
            max-width: 880px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            margin-bottom: 10px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-card);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-main);
            background: transparent;
            width: 100%;
            text-align: left;
            transition: var(--transition);
            gap: 12px;
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            color: var(--primary);
            transition: var(--transition);
            font-size: 0.85rem;
        }
        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.25s ease;
            padding: 0 20px;
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 20px 16px;
        }
        .support-channel-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .support-channel {
            text-align: center;
            padding: 24px 18px;
        }
        .support-channel .channel-icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .support-channel h4 {
            font-size: 1rem;
            margin-bottom: 6px;
        }
        .support-channel p {
            color: var(--text-muted);
            font-size: 0.82rem;
            margin-bottom: 0;
        }
        .news-list-inline {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .news-item-inline {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 14px 16px;
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            flex-wrap: wrap;
        }
        .news-item-inline:hover {
            box-shadow: var(--shadow-card);
            transform: translateY(-1px);
        }
        .news-item-inline .news-thumb {
            flex: 0 0 100px;
            height: 70px;
            border-radius: var(--radius-sm);
            overflow: hidden;
        }
        .news-item-inline .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-item-inline .news-info {
            flex: 1;
            min-width: 200px;
        }
        .news-item-inline .news-info h4 {
            font-size: 0.95rem;
            margin-bottom: 4px;
        }
        .news-item-inline .news-info p {
            color: var(--text-muted);
            font-size: 0.82rem;
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-item-inline .news-date {
            font-size: 0.75rem;
            color: var(--text-muted);
            flex-shrink: 0;
            white-space: nowrap;
        }
        .cta-banner {
            background: linear-gradient(135deg, #1E4FBF 0%, #2F6FED 60%, #3B7AF5 100%);
            border-radius: var(--radius-lg);
            padding: 36px 40px;
            display: flex;
            align-items: center;
            gap: 28px;
            flex-wrap: wrap;
            color: #fff;
        }
        .cta-banner .cta-text {
            flex: 1;
            min-width: 260px;
        }
        .cta-banner .cta-text h3 {
            color: #fff;
            font-size: 1.35rem;
            margin-bottom: 8px;
        }
        .cta-banner .cta-text p {
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 0;
            font-size: 0.9rem;
        }
        .site-footer {
            background: #12263F;
            color: #B8C9DE;
            padding: 48px 0 24px;
            margin-top: 40px;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .site-footer .footer-brand .brand-logo {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 10px;
        }
        .site-footer .footer-brand .brand-logo i {
            color: var(--accent-orange);
        }
        .site-footer .footer-brand p {
            color: #9FB3CC;
            font-size: 0.85rem;
            max-width: 280px;
        }
        .site-footer .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            margin-bottom: 14px;
        }
        .site-footer .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-col ul li {
            margin-bottom: 8px;
        }
        .site-footer .footer-col ul li a {
            color: #9FB3CC;
            font-size: 0.85rem;
            transition: var(--transition);
        }
        .site-footer .footer-col ul li a:hover {
            color: #fff;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 18px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 0.82rem;
            color: #7E94B0;
        }
        .site-footer .footer-bottom .footer-links {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .site-footer .footer-bottom .footer-links a {
            color: #9FB3CC;
            font-size: 0.82rem;
        }
        .site-footer .footer-bottom .footer-links a:hover {
            color: #fff;
        }
        @media (max-width: 1024px) {
            .security-step-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .support-channel-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none !important;
            }
            .nav-cta {
                display: none;
            }
            .mobile-tab-nav {
                display: flex;
            }
            body.has-mobile-tab {
                padding-bottom: 72px;
            }
            .section {
                padding: 36px 0;
            }
            .page-header-compact h1 {
                font-size: 1.5rem;
            }
            .support-hero-card {
                padding: 20px;
                flex-direction: column;
                text-align: center;
            }
            .support-hero-card .hero-image {
                flex: none;
                width: 100%;
            }
            .support-hero-card .hero-image img {
                height: 160px;
            }
            .download-panel {
                grid-template-columns: 1fr;
            }
            .security-step-list {
                grid-template-columns: 1fr;
            }
            .support-channel-grid {
                grid-template-columns: 1fr;
            }
            .cta-banner {
                padding: 24px 20px;
                flex-direction: column;
                text-align: center;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .news-item-inline .news-thumb {
                flex: 0 0 70px;
                height: 50px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 14px;
            }
            .breadcrumb {
                font-size: 0.78rem;
            }
            .page-header-compact h1 {
                font-size: 1.3rem;
            }
            .btn {
                padding: 8px 16px;
                font-size: 0.82rem;
            }
            .download-card {
                padding: 18px 16px;
            }
            .faq-question {
                padding: 12px 14px;
                font-size: 0.88rem;
            }
            .faq-answer {
                padding: 0 14px;
                font-size: 0.82rem;
            }
            .faq-item.active .faq-answer {
                padding: 0 14px 12px;
            }
        }