/* roulang page: index */
:root {
            --primary: #3E6E9E;
            --primary-dark: #325A84;
            --primary-light: #5A8BBF;
            --accent: #F0A35E;
            --accent-coral: #E68B6A;
            --bg-page: #F7F9FC;
            --bg-alt: #F5F8FB;
            --card-bg: #FFFFFF;
            --border-light: #EEF1F5;
            --text-main: #1F2A38;
            --text-secondary: #5B6572;
            --text-muted: #8A94A6;
            --success-green: #5FA47A;
            --warning-red: #D98C7F;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-pill: 999px;
            --shadow-sm: 0 2px 10px rgba(31,42,56,0.05);
            --shadow-md: 0 4px 16px rgba(31,42,56,0.08);
            --shadow-lg: 0 8px 26px rgba(31,42,56,0.10);
            --transition: 0.2s ease;
            --font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
            --section-pad: 80px;
        }

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

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-main);
            background-color: var(--bg-page);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

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

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

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent-coral);
            outline-offset: 2px;
        }

        ul, ol {
            list-style: none;
        }

        button {
            cursor: pointer;
            font-family: var(--font-family);
        }

        input {
            font-family: var(--font-family);
        }

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

        /* ==================== Header / Navigation ==================== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            display: flex;
            align-items: center;
        }

        .header-inner {
            display: flex;
            align-items: center;
            gap: 20px;
            width: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-size: 19px;
            font-weight: 700;
            color: var(--text-main);
            white-space: nowrap;
        }

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

        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--primary);
            border-radius: var(--radius-pill);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .header-search {
            flex: 1;
            max-width: 420px;
            min-width: 200px;
            position: relative;
            margin: 0 auto;
        }

        .header-search svg {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            width: 18px;
            height: 18px;
            color: var(--text-muted);
            pointer-events: none;
        }

        .header-search input {
            width: 100%;
            height: 42px;
            border-radius: var(--radius-pill);
            border: 1.5px solid transparent;
            background: #F1F4F8;
            padding: 0 18px 0 44px;
            font-size: 14px;
            color: var(--text-main);
            transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
        }

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

        .header-search input:focus {
            background: #fff;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(62,110,158,0.12);
            outline: none;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            height: 38px;
            padding: 0 16px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .nav-links a:hover {
            background: var(--bg-alt);
            color: var(--text-main);
        }

        .nav-links a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            width: 40px;
            height: 40px;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            border-radius: var(--radius-sm);
            color: var(--text-main);
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: all var(--transition);
        }

        /* ==================== Hero Section ==================== */
        .hero {
            padding-top: calc(var(--header-height) + 48px);
            padding-bottom: 64px;
            min-height: 72vh;
            display: flex;
            align-items: center;
            background: linear-gradient(180deg, #F5F8FB 0%, #F7F9FC 35%, #FFFFFF 100%);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -60px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(90,139,191,0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -50px;
            left: -30px;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(240,163,94,0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

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

        .hero-content {
            max-width: 540px;
        }

        .hero-brand-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-pill);
            padding: 8px 18px 8px 10px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            margin-bottom: 24px;
            box-shadow: var(--shadow-sm);
        }

        .hero-brand-badge .badge-dot {
            width: 28px;
            height: 28px;
            background: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 13px;
            font-weight: 700;
        }

        .hero h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-main);
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

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

        .hero-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 28px;
            max-width: 480px;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 46px;
            padding: 0 28px;
            border-radius: var(--radius-pill);
            font-size: 15px;
            font-weight: 600;
            border: none;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(62,110,158,0.28);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(62,110,158,0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(62,110,158,0.25);
        }

        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--primary);
        }

        .btn-secondary:hover {
            background: rgba(62,110,158,0.06);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }

        .btn-link {
            background: none;
            border: none;
            color: var(--primary);
            font-size: 15px;
            font-weight: 500;
            height: auto;
            padding: 0 4px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .btn-link:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

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

        .trust-badge {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .trust-badge .number {
            font-size: 24px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
        }

        .trust-badge .label {
            font-size: 12px;
            color: var(--text-muted);
        }

        .hero-visual {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-image-wrap {
            position: relative;
            width: 100%;
            max-width: 480px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .hero-image-wrap img {
            width: 100%;
            height: 340px;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }

        .hero-image-overlay {
            position: absolute;
            bottom: 16px;
            left: 16px;
            right: 16px;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(6px);
            border-radius: var(--radius-md);
            padding: 16px 20px;
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .hero-image-overlay .mini-stat {
            flex: 1;
            text-align: center;
        }

        .hero-image-overlay .mini-stat .num {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
        }

        .hero-image-overlay .mini-stat .lbl {
            font-size: 11px;
            color: var(--text-muted);
        }

        .hero-image-overlay .divider {
            width: 1px;
            height: 32px;
            background: var(--border-light);
        }

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

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

        .section-white {
            background: #fff;
        }

        .section-header {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 44px;
        }

        .section-tag {
            display: inline-block;
            background: rgba(62,110,158,0.08);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            border-radius: var(--radius-pill);
            padding: 5px 16px;
            margin-bottom: 12px;
        }

        .section-header h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-main);
            margin-bottom: 14px;
        }

        .section-header p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.9;
        }

        /* ==================== Pain Point Cards ==================== */
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 22px;
        }

        .pain-card {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 26px 24px;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .pain-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: rgba(62,110,158,0.2);
        }

        .pain-card .card-icon {
            width: 46px;
            height: 46px;
            border-radius: var(--radius-md);
            background: rgba(62,110,158,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 16px;
            color: var(--primary);
        }

        .pain-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
            line-height: 1.45;
        }

        .pain-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ==================== Solution Section ==================== */
        .solution-layout {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 48px;
            align-items: center;
        }

        .solution-text h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.35;
            margin-bottom: 16px;
        }

        .solution-text p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 20px;
        }

        .solution-points {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 18px;
        }

        .solution-point {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .solution-point:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .solution-point .point-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            background: var(--primary);
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            border-radius: 50%;
            margin-bottom: 10px;
        }

        .solution-point h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
        }

        .solution-point p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ==================== Steps Section ==================== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 18px;
            counter-reset: step;
        }

        .step-item {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 24px 22px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            position: relative;
            transition: all var(--transition);
        }

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

        .step-num {
            width: 36px;
            height: 36px;
            background: var(--accent);
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 14px;
        }

        .step-item h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .step-item p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ==================== Stats Data Section ==================== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
        }

        .stat-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .stat-number {
            font-size: 36px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .stat-number .stat-suffix {
            font-size: 18px;
            font-weight: 600;
            color: var(--accent);
        }

        .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
            font-weight: 500;
            margin-bottom: 6px;
        }

        .stat-badge {
            display: inline-block;
            background: rgba(95,164,122,0.1);
            color: var(--success-green);
            font-size: 11px;
            font-weight: 600;
            border-radius: var(--radius-pill);
            padding: 3px 10px;
        }

        /* ==================== Testimonials ==================== */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 22px;
        }

        .testimonial-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 26px 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .testimonial-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .testimonial-stars {
            color: var(--accent);
            font-size: 14px;
            letter-spacing: 2px;
            margin-bottom: 12px;
        }

        .testimonial-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .testimonial-user {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .testimonial-user .avatar {
            width: 36px;
            height: 36px;
            background: var(--primary-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 14px;
            font-weight: 600;
        }

        .testimonial-user .user-info .name {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
        }

        .testimonial-user .user-info .scene {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ==================== Audience Section ==================== */
        .audience-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 22px;
        }

        .audience-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 26px 22px;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

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

        .audience-icon {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(62,110,158,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin: 0 auto 14px;
        }

        .audience-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .audience-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ==================== CMS News Section ==================== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

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

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

        .news-card .news-thumb {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
            background: var(--bg-alt);
        }

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

        .news-card .news-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }

        .news-card .news-tag {
            display: inline-block;
            background: rgba(62,110,158,0.1);
            color: var(--primary);
            font-size: 11px;
            font-weight: 600;
            border-radius: var(--radius-pill);
            padding: 3px 12px;
        }

        .news-card .news-time {
            font-size: 12px;
            color: var(--text-muted);
        }

        .news-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.5;
            margin-bottom: 8px;
        }

        .news-card .news-excerpt {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.75;
            flex: 1;
        }

        .news-empty {
            background: var(--bg-alt);
            border: 1.5px dashed var(--border-light);
            border-radius: var(--radius-lg);
            padding: 48px 24px;
            text-align: center;
            color: var(--text-muted);
            font-size: 15px;
        }

        .section-more {
            text-align: center;
            margin-top: 32px;
        }

        /* ==================== Metrics Section ==================== */
        .metrics-band {
            background: var(--primary);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 28px;
            box-shadow: var(--shadow-lg);
        }

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

        .metric-item .metric-value {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .metric-item .metric-value .metric-unit {
            font-size: 16px;
            font-weight: 500;
            color: rgba(255,255,255,0.7);
        }

        .metric-item .metric-label {
            font-size: 13px;
            color: rgba(255,255,255,0.75);
            font-weight: 500;
        }

        /* ==================== CTA Section ==================== */
        .cta-section {
            background: linear-gradient(135deg, #F5F8FB 0%, #EEF3F8 50%, #F5F8FB 100%);
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, rgba(240,163,94,0.1) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 14px;
        }

        .cta-section p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 auto 26px;
            line-height: 1.9;
        }

        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ==================== Country Cards ==================== */
        .country-scroll {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            overflow-x: auto;
            padding-bottom: 8px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
        }

        .country-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            scroll-snap-align: start;
            min-width: 220px;
        }

        .country-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .country-card img {
            width: 100%;
            height: 140px;
            object-fit: cover;
            border-radius: 0;
            background: var(--bg-alt);
        }

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

        .country-card .country-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 4px;
        }

        .country-card .country-count {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ==================== Scenario Cards ==================== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
        }

        .scenario-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 24px 22px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .scenario-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .scenario-card .scenario-icon {
            font-size: 22px;
            color: var(--primary);
        }

        .scenario-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
        }

        .scenario-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ==================== Resource Tools ==================== */
        .resource-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 16px;
        }

        .resource-item {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .resource-item:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(62,110,158,0.2);
        }

        .resource-item .res-info h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 2px;
        }

        .resource-item .res-info span {
            font-size: 12px;
            color: var(--text-muted);
        }

        .resource-item .res-badge {
            display: inline-block;
            background: rgba(62,110,158,0.1);
            color: var(--primary);
            font-size: 11px;
            font-weight: 600;
            border-radius: var(--radius-pill);
            padding: 4px 12px;
            white-space: nowrap;
        }

        /* ==================== FAQ ==================== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

        .faq-item.active {
            border-color: rgba(62,110,158,0.3);
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            text-align: left;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            transition: all var(--transition);
        }

        .faq-question:hover {
            background: var(--bg-alt);
        }

        .faq-question .faq-toggle {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(62,110,158,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-weight: 700;
            transition: transform var(--transition);
        }

        .faq-item.active .faq-toggle {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 22px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 22px 20px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.9;
        }

        /* ==================== Trend Section ==================== */
        .trend-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 22px;
        }

        .trend-item {
            display: flex;
            gap: 16px;
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 18px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .trend-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .trend-item img {
            width: 120px;
            height: 90px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
            background: var(--bg-alt);
        }

        .trend-item .trend-info h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.5;
            margin-bottom: 6px;
        }

        .trend-item .trend-info p {
            font-size: 12px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .trend-item .trend-info .trend-time {
            font-size: 11px;
            color: var(--text-muted);
        }

        /* ==================== Subscribe Section ==================== */
        .subscribe-form {
            max-width: 520px;
            margin: 0 auto;
            display: flex;
            gap: 12px;
        }

        .subscribe-form input {
            flex: 1;
            height: 46px;
            border-radius: var(--radius-pill);
            border: 1.5px solid var(--border-light);
            background: #fff;
            padding: 0 22px;
            font-size: 14px;
            color: var(--text-main);
            transition: all var(--transition);
        }

        .subscribe-form input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(62,110,158,0.12);
            outline: none;
        }

        .subscribe-form .btn {
            height: 46px;
            flex-shrink: 0;
        }

        .subscribe-note {
            text-align: center;
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 10px;
        }

        /* ==================== Footer ==================== */
        .site-footer {
            background: #2A3442;
            color: #B8C2D0;
            padding-top: 56px;
            padding-bottom: 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 36px;
            margin-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-brand .footer-logo .logo-icon {
            width: 34px;
            height: 34px;
            background: var(--primary-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: #fff;
        }

        .footer-brand p {
            font-size: 13px;
            color: #B8C2D0;
            line-height: 1.8;
            max-width: 280px;
        }

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

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

        .footer-col ul li a {
            font-size: 13px;
            color: #B8C2D0;
            transition: color var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(184,194,208,0.15);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
            color: #8A94A6;
        }

        .footer-bottom a {
            color: #B8C2D0;
        }

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

        /* ==================== Responsive ==================== */
        @media (max-width: 1024px) {
            :root {
                --section-pad: 60px;
            }

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

            .hero-content {
                max-width: 100%;
                text-align: center;
            }

            .hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }

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

            .hero-trust-badges {
                justify-content: center;
            }

            .hero-visual {
                max-width: 520px;
                margin: 0 auto;
            }

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

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

            .country-scroll {
                grid-template-columns: repeat(3, 1fr);
            }

            .trend-list {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-pad: 48px;
                --header-height: 60px;
            }

            .header-inner {
                flex-wrap: wrap;
                gap: 10px;
                padding: 8px 0;
            }

            .logo {
                font-size: 17px;
            }

            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 14px;
            }

            .header-search {
                order: 3;
                max-width: 100%;
                width: 100%;
                flex-basis: 100%;
            }

            .header-search input {
                height: 38px;
                font-size: 13px;
            }

            .nav-links {
                gap: 4px;
            }

            .nav-links a {
                height: 34px;
                padding: 0 12px;
                font-size: 13px;
            }

            .hero {
                padding-top: calc(var(--header-height) + 70px);
                padding-bottom: 40px;
            }

            .hero h1 {
                font-size: 28px;
            }

            .hero-subtitle {
                font-size: 14px;
                line-height: 1.8;
            }

            .hero-image-wrap img {
                height: 240px;
            }

            .hero-image-overlay {
                padding: 12px 14px;
                flex-wrap: wrap;
                gap: 8px;
            }

            .hero-image-overlay .mini-stat .num {
                font-size: 16px;
            }

            .hero-image-overlay .divider {
                display: none;
            }

            .section-header h2 {
                font-size: 22px;
            }

            .pain-grid,
            .stats-grid,
            .testimonial-grid,
            .audience-grid,
            .scenario-grid,
            .resource-list {
                grid-template-columns: 1fr;
            }

            .solution-points {
                grid-template-columns: 1fr;
            }

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

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

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

            .metrics-band {
                grid-template-columns: repeat(2, 1fr);
                padding: 28px 20px;
                gap: 20px;
            }

            .cta-section {
                padding: 36px 24px;
            }

            .cta-section h2 {
                font-size: 22px;
            }

            .subscribe-form {
                flex-direction: column;
                gap: 10px;
            }

            .subscribe-form .btn {
                width: 100%;
            }

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

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

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 24px;
            }

            .hero-trust-badges {
                gap: 16px;
                flex-wrap: wrap;
                justify-content: center;
            }

            .trust-badge .number {
                font-size: 20px;
            }

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

            .country-scroll {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }

            .country-card {
                min-width: 0;
            }

            .nav-links a {
                padding: 0 10px;
                font-size: 12px;
            }

            .section-header {
                margin-bottom: 32px;
            }
        }

/* roulang page: article */
:root {
        --primary: #3E6E9E;
        --primary-dark: #325A84;
        --primary-light: #5A8BBF;
        --accent: #F0A35E;
        --accent-coral: #E68B6A;
        --bg-page: #F7F9FC;
        --bg-alt: #F5F8FB;
        --card-bg: #FFFFFF;
        --border-light: #EEF1F5;
        --text-main: #1F2A38;
        --text-secondary: #5B6572;
        --text-muted: #8A94A6;
        --success-green: #5FA47A;
        --warning-red: #D98C7F;
        --radius-sm: 8px;
        --radius-md: 12px;
        --radius-lg: 16px;
        --radius-pill: 999px;
        --shadow-sm: 0 2px 10px rgba(31,42,56,0.05);
        --shadow-md: 0 4px 16px rgba(31,42,56,0.08);
        --shadow-lg: 0 8px 26px rgba(31,42,56,0.10);
        --transition: 0.2s ease;
        --font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
        --container-max: 1200px;
        --header-height: 72px;
        --section-pad: 64px;
    }

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

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

    body {
        font-family: var(--font-family);
        font-size: 16px;
        line-height: 1.85;
        color: var(--text-main);
        background-color: var(--bg-page);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        padding-top: var(--header-height);
    }

    img {
        max-width: 100%;
        height: auto;
        display: block;
        border-radius: var(--radius-md);
    }

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

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

    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    select:focus-visible {
        outline: 2px solid var(--accent-coral);
        outline-offset: 2px;
    }

    button {
        cursor: pointer;
        font-family: var(--font-family);
    }

    input {
        font-family: var(--font-family);
    }

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

    /* Header / Navigation */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        height: var(--header-height);
        background: rgba(255, 255, 255, 0.94);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--border-light);
        z-index: 1000;
        display: flex;
        align-items: center;
    }

    .header-inner {
        display: flex;
        align-items: center;
        gap: 20px;
        width: 100%;
    }

    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
        font-size: 19px;
        font-weight: 700;
        color: var(--text-main);
        white-space: nowrap;
    }

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

    .logo-icon {
        width: 38px;
        height: 38px;
        background: var(--primary);
        border-radius: var(--radius-pill);
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 16px;
        font-weight: 700;
        flex-shrink: 0;
    }

    .header-search {
        flex: 1;
        max-width: 420px;
        min-width: 200px;
        position: relative;
        margin: 0 auto;
    }

    .header-search svg {
        position: absolute;
        left: 16px;
        top: 50%;
        transform: translateY(-50%);
        width: 18px;
        height: 18px;
        color: var(--text-muted);
        pointer-events: none;
    }

    .header-search input {
        width: 100%;
        height: 42px;
        border-radius: var(--radius-pill);
        border: 1.5px solid transparent;
        background: #F1F4F8;
        padding: 0 18px 0 44px;
        font-size: 14px;
        color: var(--text-main);
        transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
    }

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

    .header-search input:focus {
        background: #fff;
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(62,110,158,0.12);
        outline: none;
    }

    .nav-links {
        display: flex;
        align-items: center;
        gap: 8px;
        flex-shrink: 0;
    }

    .nav-links a {
        display: inline-flex;
        align-items: center;
        height: 38px;
        padding: 0 16px;
        border-radius: var(--radius-pill);
        font-size: 14px;
        font-weight: 500;
        color: var(--text-secondary);
        transition: all var(--transition);
        white-space: nowrap;
    }

    .nav-links a:hover {
        background: var(--bg-alt);
        color: var(--text-main);
    }

    .nav-links a.active {
        background: var(--primary);
        color: #fff;
        font-weight: 600;
    }

    /* Article Header Section */
    .article-head-section {
        background: linear-gradient(180deg, #F5F8FB 0%, var(--bg-page) 100%);
        padding: 48px 0 32px;
        border-bottom: 1px solid var(--border-light);
    }

    .breadcrumb {
        font-size: 14px;
        color: var(--text-muted);
        margin-bottom: 16px;
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
        align-items: center;
    }

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

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

    .breadcrumb .current {
        color: var(--text-secondary);
        max-width: 320px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .article-head-section h1 {
        font-size: 32px;
        line-height: 1.3;
        font-weight: 700;
        color: var(--text-main);
        margin-bottom: 12px;
    }

    .article-meta {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 8px;
        font-size: 14px;
        color: var(--text-muted);
    }

    .meta-divider {
        color: var(--border-light);
    }

    .meta-category {
        display: inline-flex;
        align-items: center;
        padding: 2px 12px;
        background: #EFF4FA;
        color: var(--primary);
        border-radius: var(--radius-pill);
        font-weight: 500;
    }

    /* Article Main Grid */
    .article-main-section {
        padding: 48px 0 64px;
    }

    .article-main-grid {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 320px;
        gap: 40px;
        align-items: start;
    }

    .article-content {
        background: var(--card-bg);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-sm);
        padding: 40px 40px 32px;
        max-width: 100%;
        overflow-wrap: break-word;
    }

    .article-content h2 {
        font-size: 24px;
        font-weight: 700;
        line-height: 1.35;
        color: var(--text-main);
        margin: 32px 0 16px;
    }

    .article-content h3 {
        font-size: 20px;
        font-weight: 600;
        line-height: 1.4;
        color: var(--text-main);
        margin: 24px 0 12px;
    }

    .article-content p {
        margin-bottom: 18px;
        color: var(--text-secondary);
        line-height: 1.9;
    }

    .article-content ul,
    .article-content ol {
        margin: 0 0 20px 24px;
        color: var(--text-secondary);
    }

    .article-content li {
        margin-bottom: 8px;
    }

    .article-content blockquote {
        border-left: 4px solid var(--primary-light);
        background: var(--bg-alt);
        padding: 16px 20px;
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        margin: 24px 0;
        color: var(--text-secondary);
        font-style: normal;
    }

    .article-content img {
        margin: 24px 0;
        border-radius: var(--radius-md);
    }

    .article-content figcaption {
        font-size: 13px;
        color: var(--text-muted);
        text-align: center;
        margin-top: -18px;
        margin-bottom: 24px;
    }

    .article-not-found {
        text-align: center;
        padding: 60px 20px;
    }

    .article-not-found p {
        font-size: 18px;
        color: var(--text-secondary);
        margin-bottom: 16px;
    }

    .article-not-found a {
        display: inline-block;
        padding: 10px 24px;
        background: var(--primary);
        color: #fff;
        border-radius: var(--radius-pill);
        font-weight: 500;
    }

    .article-not-found a:hover {
        background: var(--primary-dark);
        color: #fff;
    }

    .article-tags {
        margin-top: 32px;
        padding-top: 20px;
        border-top: 1px solid var(--border-light);
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        align-items: center;
    }

    .article-tags span {
        font-size: 14px;
        color: var(--text-muted);
    }

    .article-tags a {
        display: inline-block;
        padding: 4px 14px;
        background: #EFF4FA;
        color: var(--primary);
        border-radius: var(--radius-pill);
        font-size: 13px;
        transition: background var(--transition), color var(--transition);
    }

    .article-tags a:hover {
        background: var(--primary);
        color: #fff;
    }

    /* Sidebar */
    .article-sidebar {
        display: flex;
        flex-direction: column;
        gap: 20px;
        position: sticky;
        top: calc(var(--header-height) + 20px);
    }

    .sidebar-card {
        background: var(--card-bg);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-sm);
        padding: 20px 22px;
        border: 1px solid var(--border-light);
    }

    .sidebar-card h3 {
        font-size: 17px;
        font-weight: 600;
        color: var(--text-main);
        margin-bottom: 12px;
        padding-bottom: 8px;
        border-bottom: 1px solid var(--border-light);
    }

    .sidebar-card p {
        font-size: 14px;
        color: var(--text-secondary);
        margin-bottom: 8px;
    }

    .sidebar-card p:last-child {
        margin-bottom: 0;
    }

    .sidebar-card strong {
        color: var(--accent-coral);
    }

    .tag-cloud {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }

    .tag-cloud a {
        display: inline-block;
        padding: 4px 12px;
        background: var(--bg-alt);
        border: 1px solid var(--border-light);
        border-radius: var(--radius-pill);
        font-size: 13px;
        color: var(--text-secondary);
        transition: all var(--transition);
    }

    .tag-cloud a:hover {
        background: var(--primary);
        border-color: var(--primary);
        color: #fff;
    }

    /* Related Section */
    .related-section {
        padding: var(--section-pad) 0;
        background: var(--bg-alt);
    }

    .related-section .section-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 28px;
        flex-wrap: wrap;
        gap: 12px;
    }

    .related-section .section-head h2 {
        font-size: 26px;
        font-weight: 700;
        color: var(--text-main);
    }

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

    .related-card {
        background: var(--card-bg);
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        transition: box-shadow var(--transition), transform var(--transition);
    }

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

    .related-card img {
        width: 100%;
        height: 180px;
        object-fit: cover;
        border-radius: 0;
    }

    .related-card .related-body {
        padding: 18px 20px 20px;
    }

    .related-card h3 {
        font-size: 18px;
        font-weight: 600;
        line-height: 1.4;
        margin-bottom: 8px;
    }

    .related-card h3 a {
        color: var(--text-main);
    }

    .related-card h3 a:hover {
        color: var(--primary);
    }

    .related-card p {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.6;
    }

    /* CTA Section */
    .article-cta-section {
        padding: var(--section-pad) 0;
        background: linear-gradient(135deg, #E8F0F7 0%, #F7F9FC 100%);
    }

    .article-cta-box {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 24px;
        flex-wrap: wrap;
    }

    .article-cta-box .cta-text h2 {
        font-size: 26px;
        font-weight: 700;
        color: var(--text-main);
        margin-bottom: 8px;
    }

    .article-cta-box .cta-text p {
        color: var(--text-secondary);
        font-size: 16px;
        margin-bottom: 0;
    }

    .subscribe-form {
        display: flex;
        gap: 10px;
        align-items: center;
        flex-wrap: wrap;
    }

    .subscribe-form input {
        width: 260px;
        height: 44px;
        border-radius: var(--radius-pill);
        border: 1.5px solid var(--border-light);
        background: #fff;
        padding: 0 18px;
        font-size: 14px;
        color: var(--text-main);
        transition: border-color var(--transition), box-shadow var(--transition);
    }

    .subscribe-form input:focus {
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(62,110,158,0.12);
        outline: none;
    }

    .subscribe-form button {
        height: 44px;
        padding: 0 22px;
        background: var(--primary);
        color: #fff;
        border: none;
        border-radius: var(--radius-pill);
        font-weight: 600;
        font-size: 14px;
        transition: background var(--transition), transform var(--transition);
    }

    .subscribe-form button:hover {
        background: var(--primary-dark);
        transform: translateY(-2px);
    }

    /* Footer */
    .site-footer {
        background: #2A3442;
        color: #B8C2D0;
        padding: 60px 0 24px;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
        gap: 40px;
        margin-bottom: 32px;
    }

    .footer-brand .footer-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 19px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 14px;
    }

    .footer-brand p {
        font-size: 14px;
        line-height: 1.8;
        color: #B8C2D0;
        max-width: 360px;
    }

    .footer-col h4 {
        font-size: 16px;
        font-weight: 600;
        color: #fff;
        margin-bottom: 14px;
    }

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

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

    .footer-col ul a {
        color: #B8C2D0;
        font-size: 14px;
        transition: color var(--transition);
    }

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

    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.1);
        padding-top: 20px;
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 10px;
        font-size: 13px;
        color: #8A94A6;
    }

    .footer-bottom a {
        color: #B8C2D0;
    }

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

    /* Responsive */
    @media (max-width: 1024px) {
        .article-main-grid {
            grid-template-columns: 1fr;
            gap: 28px;
        }

        .article-sidebar {
            position: static;
            flex-direction: row;
            flex-wrap: wrap;
        }

        .sidebar-card {
            flex: 1 1 240px;
        }

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

    @media (max-width: 768px) {
        :root {
            --section-pad: 48px;
            --header-height: 60px;
        }

        .header-inner {
            flex-wrap: wrap;
            gap: 12px;
        }

        .logo {
            font-size: 17px;
            gap: 8px;
        }

        .logo-icon {
            width: 34px;
            height: 34px;
            font-size: 14px;
        }

        .header-search {
            order: 3;
            flex-basis: 100%;
            max-width: 100%;
            min-width: 0;
        }

        .nav-links {
            margin-left: auto;
        }

        .article-head-section h1 {
            font-size: 26px;
        }

        .article-content {
            padding: 28px 20px 24px;
        }

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

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

        .subscribe-form {
            width: 100%;
        }

        .subscribe-form input {
            flex: 1;
            width: 100%;
        }

        .footer-grid {
            grid-template-columns: 1fr;
            gap: 28px;
        }
    }

    @media (max-width: 480px) {
        .nav-links a {
            padding: 0 12px;
            font-size: 13px;
        }

        .article-head-section {
            padding: 32px 0 24px;
        }

        .breadcrumb .current {
            max-width: 180px;
        }

        .article-content h2 {
            font-size: 22px;
        }

        .sidebar-card {
            flex-basis: 100%;
        }
    }

/* roulang page: category1 */
:root {
            --primary: #3E6E9E;
            --primary-dark: #325A84;
            --primary-light: #5A8BBF;
            --accent: #F0A35E;
            --accent-coral: #E68B6A;
            --bg-page: #F7F9FC;
            --bg-alt: #F5F8FB;
            --card-bg: #FFFFFF;
            --border-light: #EEF1F5;
            --text-main: #1F2A38;
            --text-secondary: #5B6572;
            --text-muted: #8A94A6;
            --success-green: #5FA47A;
            --warning-red: #D98C7F;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-pill: 999px;
            --shadow-sm: 0 2px 10px rgba(31,42,56,0.05);
            --shadow-md: 0 4px 16px rgba(31,42,56,0.08);
            --shadow-lg: 0 8px 26px rgba(31,42,56,0.10);
            --transition: 0.2s ease;
            --font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
            --section-pad: 60px;
        }

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

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-main);
            background-color: var(--bg-page);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

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

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

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent-coral);
            outline-offset: 2px;
        }

        button {
            cursor: pointer;
            font-family: var(--font-family);
        }

        input,
        select {
            font-family: var(--font-family);
        }

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

        /* ==================== Header / Navigation ==================== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            display: flex;
            align-items: center;
        }

        .header-inner {
            display: flex;
            align-items: center;
            gap: 20px;
            width: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-size: 19px;
            font-weight: 700;
            color: var(--text-main);
            white-space: nowrap;
        }

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

        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--primary);
            border-radius: var(--radius-pill);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .header-search {
            flex: 1;
            max-width: 420px;
            min-width: 200px;
            position: relative;
            margin: 0 auto;
        }

        .header-search svg {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            width: 18px;
            height: 18px;
            color: var(--text-muted);
            pointer-events: none;
        }

        .header-search input {
            width: 100%;
            height: 42px;
            border-radius: var(--radius-pill);
            border: 1.5px solid transparent;
            background: #F1F4F8;
            padding: 0 18px 0 44px;
            font-size: 14px;
            color: var(--text-main);
            transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
        }

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

        .header-search input:focus {
            background: #fff;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(62,110,158,0.12);
            outline: none;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            height: 38px;
            padding: 0 16px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .nav-links a:hover {
            background: var(--bg-alt);
            color: var(--text-main);
        }

        .nav-links a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }

        /* ==================== Footer ==================== */
        .site-footer {
            background: #2A3442;
            color: #B8C2D0;
            padding: 60px 0 30px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            margin-top: 16px;
            color: #B8C2D0;
            max-width: 360px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
        }

        .footer-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary-light);
            font-size: 15px;
        }

        .footer-col h4 {
            font-size: 16px;
            color: #fff;
            margin-bottom: 18px;
            font-weight: 600;
        }

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

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

        .footer-col a {
            color: #B8C2D0;
            font-size: 14px;
            transition: color var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: #B8C2D0;
        }

        .footer-bottom a {
            color: #B8C2D0;
            text-decoration: none;
        }

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

        /* ==================== Category Page Specific ==================== */
        main {
            padding-top: var(--header-height);
        }

        .section {
            padding: var(--section-pad) 0;
        }

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

        .section-title {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-main);
            margin-bottom: 16px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 800px;
        }

        /* Breadcrumb + H1 */
        .cat-hero {
            background: linear-gradient(180deg, #FFFFFF 0%, var(--bg-alt) 100%);
            padding: 44px 0 36px;
            border-bottom: 1px solid var(--border-light);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }

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

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

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

        .cat-hero h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .cat-hero .lead {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 800px;
        }

        /* Filter Toolbar */
        .filter-bar {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 20px 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            box-shadow: var(--shadow-sm);
            margin-bottom: 24px;
        }

        .filter-group {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .filter-label {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 600;
        }

        .filter-pill {
            display: inline-flex;
            align-items: center;
            height: 34px;
            padding: 0 16px;
            border-radius: var(--radius-pill);
            border: 1px solid var(--border-light);
            background: #fff;
            color: var(--text-secondary);
            font-size: 13px;
            cursor: pointer;
            transition: all var(--transition);
        }

        .filter-pill:hover {
            border-color: var(--primary-light);
            color: var(--primary);
        }

        .filter-pill.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }

        .filter-select {
            height: 34px;
            padding: 0 12px;
            border-radius: var(--radius-pill);
            border: 1px solid var(--border-light);
            background: #fff;
            color: var(--text-secondary);
            font-size: 13px;
        }

        /* Card Matrix */
        .card-matrix {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .product-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition), transform var(--transition);
            display: flex;
            flex-direction: column;
        }

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

        .product-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }

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

        .product-card .card-title {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .product-card .card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }

        .product-card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .tag {
            display: inline-flex;
            align-items: center;
            height: 24px;
            padding: 0 12px;
            border-radius: var(--radius-pill);
            background: #EFF4FA;
            color: var(--primary);
            font-size: 12px;
            font-weight: 500;
        }

        .product-card.large {
            grid-column: span 2;
        }

        .product-card.large .card-img {
            height: 260px;
        }

        /* Tag Cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .tag-cloud a {
            display: inline-flex;
            align-items: center;
            height: 40px;
            padding: 0 20px;
            border-radius: var(--radius-pill);
            background: #fff;
            border: 1px solid var(--border-light);
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            transition: all var(--transition);
        }

        .tag-cloud a:hover {
            border-color: var(--primary-light);
            color: var(--primary);
            background: #F4F8FC;
        }

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

        .mini-stat-card {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 20px 24px;
            box-shadow: var(--shadow-sm);
            border-left: 4px solid var(--primary-light);
            transition: transform var(--transition);
        }

        .mini-stat-card:hover {
            transform: translateY(-2px);
        }

        .mini-stat-card .stat-number {
            font-size: 30px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }

        .mini-stat-card .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* Update List */
        .update-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .update-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: #fff;
            border-radius: var(--radius-md);
            padding: 16px 20px;
            box-shadow: var(--shadow-sm);
            gap: 16px;
            flex-wrap: wrap;
            transition: box-shadow var(--transition);
        }

        .update-item:hover {
            box-shadow: var(--shadow-md);
        }

        .update-item .update-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            flex: 1;
            min-width: 200px;
        }

        .update-item .update-date {
            font-size: 13px;
            color: var(--text-muted);
            white-space: nowrap;
        }

        .update-item .tag {
            flex-shrink: 0;
        }

        /* Scenario Cards */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .scenario-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition), transform var(--transition);
        }

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

        .scenario-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            color: var(--primary);
            font-size: 24px;
            font-weight: 700;
        }

        .scenario-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-main);
        }

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

        /* CTA Bar */
        .cta-bar {
            background: linear-gradient(135deg, #EFF4FA 0%, #E0EAF5 100%);
            border-radius: var(--radius-lg);
            padding: 32px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }

        .cta-bar .cta-text h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
        }

        .cta-bar .cta-text p {
            font-size: 14px;
            color: var(--text-secondary);
        }

        .cta-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            min-width: 280px;
        }

        .cta-form input {
            flex: 1;
            height: 44px;
            border-radius: var(--radius-pill);
            border: 1px solid var(--border-light);
            background: #fff;
            padding: 0 20px;
            font-size: 14px;
            min-width: 200px;
        }

        .cta-form input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(62,110,158,0.12);
            outline: none;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 28px;
            border-radius: var(--radius-pill);
            border: none;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition);
        }

        .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .card-matrix {
                grid-template-columns: repeat(2, 1fr);
            }
            .product-card.large {
                grid-column: span 2;
            }
            .mini-stats {
                grid-template-columns: repeat(2, 1fr);
            }
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-pad: 48px;
                --header-height: 60px;
            }
            .header-inner {
                flex-wrap: wrap;
                gap: 12px;
            }
            .header-search {
                order: 3;
                flex-basis: 100%;
                max-width: 100%;
                min-width: auto;
            }
            .nav-links {
                order: 2;
                margin-left: auto;
            }
            .card-matrix {
                grid-template-columns: 1fr;
            }
            .product-card.large {
                grid-column: span 1;
            }
            .product-card.large .card-img {
                height: 180px;
            }
            .mini-stats {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-bar {
                flex-direction: column;
                align-items: stretch;
                text-align: center;
            }
            .cta-form {
                flex-direction: column;
                min-width: 0;
            }
            .cta-form input {
                min-width: 0;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                gap: 8px;
            }
            .logo {
                font-size: 16px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 14px;
            }
            .nav-links a {
                padding: 0 12px;
                font-size: 13px;
                height: 34px;
            }
            .cat-hero h1 {
                font-size: 28px;
            }
            .filter-bar {
                padding: 16px;
            }
            .mini-stats {
                grid-template-columns: 1fr;
            }
        }