/* roulang page: index */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-light: #EFF6FF;
            --secondary: #0F172A;
            --accent: #38BDF8;
            --bg-page: #F8FAFC;
            --bg-card: #FFFFFF;
            --text-primary: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --success: #10B981;
            --warning: #F59E0B;
            --font-sans: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --shadow-card: 0 4px 18px rgba(0, 0, 0, 0.06);
            --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
            --shadow-nav: 0 2px 12px rgba(0, 0, 0, 0.06);
            --shadow-btn: 0 4px 14px rgba(37, 99, 235, 0.3);
            --radius-card: 14px;
            --radius-btn: 8px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-page);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, opacity 0.25s ease;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        ::selection {
            background: rgba(37, 99, 235, 0.15);
            color: var(--text-primary);
        }

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

        @media (max-width: 640px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* Top info bar */
        .top-info-bar {
            background: var(--secondary);
            color: #CBD5E1;
            height: 38px;
            display: flex;
            align-items: center;
            font-size: 13px;
            position: relative;
            z-index: 50;
        }
        .top-info-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .top-info-bar a {
            color: #E2E8F0;
            font-weight: 500;
            transition: color 0.2s;
        }
        .top-info-bar a:hover {
            color: #FFFFFF;
        }
        .top-info-bar .top-cta {
            display: flex;
            align-items: center;
            gap: 6px;
            color: #93C5FD;
            font-weight: 600;
        }
        .top-info-bar .top-cta:hover {
            color: #DBEAFE;
        }
        .top-info-bar svg {
            width: 14px;
            height: 14px;
            flex-shrink: 0;
        }

        /* Main navigation */
        .main-nav {
            background: var(--bg-card);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-nav);
            border-bottom: 1px solid var(--border);
        }
        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            flex-shrink: 0;
        }
        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .nav-logo .logo-icon span {
            line-height: 1;
        }
        .nav-links-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0 auto;
            flex-wrap: wrap;
        }
        .nav-links-desktop a {
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 6px;
            transition: color 0.2s, background-color 0.2s;
            position: relative;
            white-space: nowrap;
        }
        .nav-links-desktop a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-links-desktop a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-cta {
            background: var(--primary);
            color: #FFFFFF;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: background-color 0.25s, box-shadow 0.25s, transform 0.15s;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
        }
        .nav-cta:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
            transform: translateY(-1px);
        }
        .nav-cta:active {
            transform: scale(0.97);
        }

        /* Hamburger */
        .hamburger-btn {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 6px;
            border: 1px solid var(--border);
            background: var(--bg-card);
            transition: background-color 0.2s;
        }
        .hamburger-btn:hover {
            background: var(--primary-light);
        }
        .hamburger-btn span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .hamburger-btn.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger-btn.open span:nth-child(2) {
            opacity: 0;
        }
        .hamburger-btn.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Mobile menu */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--bg-card);
            z-index: 99;
            padding: 100px 24px 40px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            padding: 14px 0;
            border-bottom: 1px solid var(--border);
            transition: color 0.2s, padding-left 0.2s;
        }
        .mobile-menu a:hover {
            color: var(--primary);
            padding-left: 8px;
        }
        .mobile-menu a.active {
            color: var(--primary);
        }
        .mobile-menu .mobile-cta {
            margin-top: 16px;
            background: var(--primary);
            color: #FFFFFF;
            text-align: center;
            padding: 16px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            border: none;
        }
        .mobile-menu .mobile-cta:hover {
            background: var(--primary-hover);
            padding-left: 16px;
        }

        @media (max-width: 1024px) {
            .nav-links-desktop {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .nav-cta.desktop-cta {
                display: none;
            }
            .main-nav .container {
                height: 60px;
            }
        }
        @media (min-width: 1025px) {
            .hamburger-btn {
                display: none;
            }
        }

        /* Section common */
        .section {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
        }
        .section-header {
            margin-bottom: 40px;
        }
        .section-header h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.35;
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.75;
        }
        @media (max-width: 640px) {
            .section-header h2 {
                font-size: 22px;
            }
            .section-header p {
                font-size: 15px;
            }
        }

        /* Hero */
        .hero {
            background: linear-gradient(160deg, #EFF6FF 0%, #F8FAFC 45%, #FFFFFF 100%);
            padding: 60px 0 80px;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            border: 3px solid rgba(37, 99, 235, 0.06);
            pointer-events: none;
        }
        .hero::after {
            content: '28';
            position: absolute;
            bottom: 20px;
            left: -30px;
            font-size: 180px;
            font-weight: 800;
            color: rgba(37, 99, 235, 0.04);
            pointer-events: none;
            line-height: 1;
        }
        .hero .container {
            position: relative;
            z-index: 1;
        }
        .hero-title {
            font-size: 44px;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.25;
            margin-bottom: 18px;
            max-width: 760px;
        }
        .hero-title span {
            color: var(--primary);
        }
        .hero-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .hero-cta-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 44px;
        }
        .btn-primary {
            background: var(--primary);
            color: #FFFFFF;
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: background-color 0.25s, box-shadow 0.25s, transform 0.15s;
            box-shadow: 0 2px 10px rgba(37, 99, 235, 0.2);
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: scale(0.97);
        }
        .btn-primary:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.3);
            outline-offset: 2px;
        }
        .btn-secondary {
            background: transparent;
            color: var(--primary);
            padding: 13px 28px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            border: 1.5px solid var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: background-color 0.25s, color 0.25s, box-shadow 0.25s, transform 0.15s;
        }
        .btn-secondary:hover {
            background: var(--primary-light);
            box-shadow: 0 2px 12px rgba(37, 99, 235, 0.15);
            transform: translateY(-2px);
        }
        .btn-secondary:active {
            transform: scale(0.97);
        }
        .btn-secondary:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.3);
            outline-offset: 2px;
        }

        /* Metrics */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .metric-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            padding: 24px 20px;
            box-shadow: var(--shadow-card);
            transition: box-shadow 0.3s, transform 0.3s;
            border: 1px solid var(--border);
        }
        .metric-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .metric-number {
            font-size: 36px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .metric-label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
            letter-spacing: 0.3px;
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 28px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .metric-number {
                font-size: 28px;
            }
        }
        @media (max-width: 480px) {
            .hero-title {
                font-size: 26px;
            }
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .metric-card {
                padding: 16px 14px;
            }
            .metric-number {
                font-size: 24px;
            }
        }

        /* Service cards */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .service-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: box-shadow 0.3s, transform 0.3s, background-color 0.3s;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .service-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            background: #FDFDFF;
        }
        .service-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            flex-shrink: 0;
        }
        .service-icon svg {
            width: 24px;
            height: 24px;
        }
        .service-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
        }
        .service-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }
        @media (max-width: 1024px) {
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 640px) {
            .service-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .service-card {
                padding: 20px 18px;
            }
        }

        /* Compare section */
        .compare-section {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 40px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            border: 1px solid var(--border);
            overflow: hidden;
        }
        .compare-col {
            padding: 24px 28px;
        }
        .compare-col.left {
            background: #F1F5F9;
            border-radius: 12px 0 0 12px;
            color: var(--text-secondary);
        }
        .compare-col.right {
            background: var(--primary-light);
            border-radius: 0 12px 12px 0;
            border-left: 2px solid var(--primary);
        }
        .compare-col h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .compare-col.left h3 {
            color: var(--text-muted);
        }
        .compare-col.right h3 {
            color: var(--primary);
        }
        .compare-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 10px 0;
            font-size: 14px;
            line-height: 1.7;
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        }
        .compare-item:last-child {
            border-bottom: none;
        }
        .compare-icon {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            flex-shrink: 0;
            margin-top: 3px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
        }
        .left .compare-icon {
            background: #E2E8F0;
            color: #64748B;
        }
        .right .compare-icon {
            background: var(--primary);
            color: #FFFFFF;
        }
        @media (max-width: 768px) {
            .compare-section {
                grid-template-columns: 1fr;
                padding: 20px;
                gap: 16px;
            }
            .compare-col.left,
            .compare-col.right {
                border-radius: 12px;
                border-left: none;
            }
            .compare-col.right {
                border-top: 2px solid var(--primary);
            }
        }

        /* Brand intro */
        .brand-intro {
            background: var(--secondary);
            color: #E2E8F0;
            padding: 60px 0;
        }
        .brand-intro .container {
            display: grid;
            grid-template-columns: 280px 1fr;
            gap: 40px;
            align-items: start;
        }
        .brand-intro-label {
            font-size: 14px;
            font-weight: 600;
            color: #93C5FD;
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 8px;
        }
        .brand-intro h2 {
            font-size: 28px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
        }
        .brand-intro p {
            font-size: 15px;
            color: #CBD5E1;
            line-height: 1.85;
        }
        @media (max-width: 768px) {
            .brand-intro .container {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .brand-intro h2 {
                font-size: 22px;
            }
        }

        /* Deep insight */
        .deep-insight {
            background: var(--bg-page);
        }
        .insight-article {
            max-width: 820px;
        }
        .insight-article h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 32px 0 12px;
            line-height: 1.4;
        }
        .insight-article h3:first-child {
            margin-top: 0;
        }
        .insight-article p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 16px;
        }

        /* Selling points trio */
        .selling-points {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .selling-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            text-align: left;
            transition: box-shadow 0.3s, transform 0.3s;
        }
        .selling-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .selling-card .sell-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .selling-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .selling-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .selling-points {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* Screenshot stage */
        .shot-stage {
            background: linear-gradient(150deg, #0F172A 0%, #1E293B 60%, #0F172A 100%);
            color: #E2E8F0;
            padding: 64px 0;
        }
        .shot-stage .section-header h2 {
            color: #FFFFFF;
        }
        .shot-stage .section-header p {
            color: #94A3B8;
        }
        .shot-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .shot-item {
            border-radius: 12px;
            overflow: hidden;
            background: #1E293B;
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .shot-item:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.35);
        }
        .shot-item img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .shot-caption {
            padding: 14px 16px;
            font-size: 13px;
            color: #94A3B8;
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        @media (max-width: 768px) {
            .shot-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .shot-item img {
                height: 180px;
            }
        }

        /* News */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            border-top: 2px solid var(--border);
        }
        .news-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border);
            transition: background-color 0.25s, padding-left 0.25s;
            border-radius: 4px;
        }
        .news-item:hover {
            background: var(--primary-light);
            padding-left: 12px;
        }
        .news-date {
            flex-shrink: 0;
            width: 64px;
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
            line-height: 1.5;
        }
        .news-date .day {
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            display: block;
        }
        .news-content {
            flex: 1;
            min-width: 0;
        }
        .news-content h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
            line-height: 1.45;
        }
        .news-content p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-link {
            flex-shrink: 0;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color 0.2s;
            white-space: nowrap;
        }
        .news-link:hover {
            color: var(--primary-hover);
            text-decoration: underline;
        }
        @media (max-width: 640px) {
            .news-item {
                flex-wrap: wrap;
                gap: 10px;
                padding: 16px 0;
            }
            .news-date {
                width: auto;
                text-align: left;
                font-size: 12px;
            }
            .news-date .day {
                font-size: 16px;
                display: inline;
            }
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 860px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: 12px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: box-shadow 0.3s, border-color 0.3s;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-card-hover);
        }
        .faq-item.open {
            border-color: var(--primary);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            transition: color 0.25s, background-color 0.25s;
            user-select: none;
            border-radius: 12px;
        }
        .faq-question:hover {
            background: var(--primary-light);
        }
        .faq-item.open .faq-question {
            color: var(--primary);
            background: var(--primary-light);
            border-radius: 12px 12px 0 0;
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 18px;
            font-weight: 700;
            transition: transform 0.3s ease;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #FFFFFF;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 22px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 22px 20px;
        }

        /* Form */
        .form-section {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 48px 40px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            border: 1px solid var(--border);
        }
        .form-left h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .form-left p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 20px;
        }
        .form-benefit {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 8px;
        }
        .form-benefit svg {
            width: 16px;
            height: 16px;
            color: var(--success);
            flex-shrink: 0;
            margin-top: 3px;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .form-group input,
        .form-group select {
            width: 100%;
            padding: 12px 14px;
            border-radius: 8px;
            border: 1.5px solid var(--border);
            font-size: 15px;
            color: var(--text-primary);
            background: var(--bg-page);
            transition: border-color 0.25s, box-shadow 0.25s;
            appearance: none;
            -webkit-appearance: none;
        }
        .form-group input:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
            background: #FFFFFF;
        }
        .form-group input::placeholder {
            color: var(--text-muted);
        }
        .form-submit {
            width: 100%;
            padding: 14px;
            background: var(--primary);
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 700;
            border-radius: 8px;
            transition: background-color 0.25s, box-shadow 0.25s, transform 0.15s;
            box-shadow: 0 2px 10px rgba(37, 99, 235, 0.2);
        }
        .form-submit:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
            transform: translateY(-1px);
        }
        .form-submit:active {
            transform: scale(0.98);
        }
        .form-submit:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.3);
            outline-offset: 2px;
        }
        @media (max-width: 768px) {
            .form-section {
                grid-template-columns: 1fr;
                padding: 28px 20px;
                gap: 24px;
            }
        }

        /* Floating CTA */
        .floating-cta {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: var(--bg-card);
            border-top: 1px solid var(--border);
            box-shadow: 0 -4px 18px rgba(0, 0, 0, 0.08);
            padding: 14px 0;
            z-index: 80;
            transform: translateY(100%);
            transition: transform 0.35s ease;
        }
        .floating-cta.visible {
            transform: translateY(0);
        }
        .floating-cta .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .floating-cta p {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .floating-cta p strong {
            color: var(--text-primary);
        }
        .floating-cta .btn-primary {
            padding: 10px 20px;
            font-size: 14px;
            white-space: nowrap;
        }
        @media (max-width: 640px) {
            .floating-cta p {
                font-size: 12px;
            }
            .floating-cta .btn-primary {
                padding: 8px 14px;
                font-size: 13px;
            }
        }

        /* Footer */
        .site-footer {
            background: var(--secondary);
            color: #CBD5E1;
            margin-top: auto;
            padding-top: 48px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 36px;
        }
        .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #FFFFFF;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 13px;
            color: #94A3B8;
            line-height: 1.75;
            margin-bottom: 0;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 14px;
        }
        .footer-col a {
            display: block;
            font-size: 13px;
            color: #94A3B8;
            padding: 6px 0;
            transition: color 0.2s, padding-left 0.2s;
        }
        .footer-col a:hover {
            color: #FFFFFF;
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 16px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 12px;
            color: #64748B;
        }
        .footer-bottom a {
            color: #94A3B8;
            transition: color 0.2s;
        }
        .footer-bottom a:hover {
            color: #FFFFFF;
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-light: #EFF6FF;
            --secondary: #0F172A;
            --accent: #38BDF8;
            --bg-page: #F8FAFC;
            --bg-card: #FFFFFF;
            --text-primary: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --success: #10B981;
            --warning: #F59E0B;
            --font-sans: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --shadow-card: 0 4px 18px rgba(0, 0, 0, 0.06);
            --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
            --shadow-nav: 0 2px 12px rgba(0, 0, 0, 0.06);
            --shadow-btn: 0 4px 14px rgba(37, 99, 235, 0.3);
            --radius-card: 14px;
            --radius-btn: 8px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-page);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, opacity 0.25s ease;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

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

        /* Top info bar */
        .top-info-bar {
            background: var(--secondary);
            color: #CBD5E1;
            font-size: 13px;
            min-height: 38px;
            display: flex;
            align-items: center;
            padding: 4px 0;
        }

        .top-info-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .top-info-bar a {
            color: #E2E8F0;
            font-weight: 500;
            transition: color 0.2s;
        }

        .top-info-bar a:hover {
            color: #FFFFFF;
        }

        .top-info-bar .top-cta {
            display: flex;
            align-items: center;
            gap: 6px;
            color: #93C5FD;
            font-weight: 600;
        }

        .top-info-bar .top-cta:hover {
            color: #DBEAFE;
        }

        /* Main navigation */
        .main-nav {
            background: var(--bg-card);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-nav);
            border-bottom: 1px solid var(--border);
        }

        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            flex-shrink: 0;
        }

        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
        }

        .nav-logo .logo-icon span {
            line-height: 1;
        }

        .nav-links-desktop {
            display: flex;
            align-items: center;
            gap: 2px;
            margin: 0 auto;
            flex-wrap: wrap;
        }

        .nav-links-desktop a {
            padding: 8px 12px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 6px;
            transition: color 0.2s, background-color 0.2s;
            position: relative;
            white-space: nowrap;
        }

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

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

        .nav-links-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 12px;
            right: 12px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-cta {
            background: var(--primary);
            color: #FFFFFF;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: background-color 0.25s, box-shadow 0.25s, transform 0.15s;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
        }

        .nav-cta:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: scale(0.97);
        }

        .nav-cta:focus-visible {
            outline: 2px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* Hamburger */
        .hamburger-btn {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 6px;
            border: 1px solid var(--border);
            background: var(--bg-card);
            transition: background-color 0.2s;
        }

        .hamburger-btn:hover {
            background: var(--primary-light);
        }

        .hamburger-btn span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .hamburger-btn.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger-btn.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger-btn.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Mobile menu */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--bg-card);
            z-index: 99;
            flex-direction: column;
            padding: 24px;
            gap: 4px;
            overflow-y: auto;
            box-shadow: var(--shadow-nav);
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu a {
            font-size: 18px;
            font-weight: 500;
            padding: 14px 12px;
            border-radius: 8px;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border);
            transition: color 0.2s, background-color 0.2s;
        }

        .mobile-menu a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .mobile-menu a.active {
            color: var(--primary);
            font-weight: 700;
        }

        .mobile-menu .nav-cta {
            margin-top: 16px;
            text-align: center;
            width: 100%;
            display: block;
        }

        /* Page hero */
        .page-hero {
            background: linear-gradient(135deg, #EFF6FF 0%, #F8FAFC 60%, #FFFFFF 100%);
            padding: 56px 0 40px;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border);
        }

        .page-hero::before {
            content: '28';
            position: absolute;
            right: -40px;
            top: -40px;
            font-size: 280px;
            font-weight: 900;
            color: rgba(37, 99, 235, 0.04);
            line-height: 1;
            pointer-events: none;
            letter-spacing: -0.05em;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            border: 2px solid rgba(56, 189, 248, 0.12);
            right: 80px;
            bottom: -80px;
            pointer-events: none;
        }

        .page-hero .container {
            position: relative;
            z-index: 1;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 40px;
        }

        .page-hero-content {
            flex: 1;
            min-width: 0;
            max-width: 680px;
        }

        .page-hero-content .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
        }

        .page-hero-content h1 {
            font-size: 38px;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.3;
            margin-bottom: 14px;
            letter-spacing: -0.02em;
        }

        .page-hero-content .hero-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 560px;
        }

        .page-hero-visual {
            flex-shrink: 0;
            width: 340px;
            max-width: 100%;
        }

        .page-hero-visual img {
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card-hover);
            object-fit: cover;
            width: 100%;
            height: 220px;
            border: 1px solid var(--border);
        }

        /* Filter bar */
        .filter-bar {
            padding: 20px 0 8px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            border-bottom: 1px solid var(--border);
            margin-bottom: 32px;
        }

        .filter-bar .filter-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            margin-right: 4px;
        }

        .filter-chip {
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            background: var(--bg-card);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            transition: all 0.2s;
            white-space: nowrap;
        }

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

        .filter-chip.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #FFFFFF;
            font-weight: 600;
        }

        /* News list */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .news-item {
            display: flex;
            gap: 28px;
            padding: 32px 8px;
            border-bottom: 1px solid var(--border);
            transition: background-color 0.25s, padding-left 0.25s;
            border-radius: 6px;
            position: relative;
        }

        .news-item:hover {
            background: var(--primary-light);
            padding-left: 16px;
        }

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

        .news-date-block {
            flex-shrink: 0;
            width: 72px;
            height: 72px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 10px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
        }

        .news-date-block .day {
            font-size: 26px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
        }

        .news-date-block .month {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-muted);
            line-height: 1.2;
        }

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

        .news-content .news-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 8px;
        }

        .news-tag {
            padding: 3px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            background: var(--primary-light);
            color: var(--primary);
            line-height: 1.5;
        }

        .news-tag.tag-accent {
            background: #E0F2FE;
            color: #0284C7;
        }

        .news-tag.tag-success {
            background: #ECFDF5;
            color: #059669;
        }

        .news-tag.tag-warning {
            background: #FFFBEB;
            color: #D97706;
        }

        .news-content h2 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.5;
            margin-bottom: 8px;
            transition: color 0.2s;
        }

        .news-item:hover .news-content h2 {
            color: var(--primary);
        }

        .news-content .news-summary {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .read-more-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: gap 0.25s, color 0.2s;
            padding: 0;
        }

        .read-more-btn:hover {
            gap: 10px;
            color: var(--primary-hover);
        }

        .read-more-btn:focus-visible {
            outline: 2px solid var(--primary-light);
            outline-offset: 3px;
            border-radius: 4px;
        }

        .read-more-btn svg {
            width: 16px;
            height: 16px;
            fill: none;
            stroke: currentColor;
            stroke-width: 2;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

        /* CTA section */
        .cta-section {
            background: var(--secondary);
            border-radius: var(--radius-card);
            padding: 48px 40px;
            margin-top: 48px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            color: #E2E8F0;
            box-shadow: var(--shadow-card);
        }

        .cta-section-text {
            flex: 1;
            min-width: 240px;
        }

        .cta-section-text h2 {
            font-size: 24px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
        }

        .cta-section-text p {
            font-size: 15px;
            color: #CBD5E1;
            line-height: 1.8;
            max-width: 520px;
        }

        .btn-primary {
            background: var(--primary);
            color: #FFFFFF;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            white-space: nowrap;
            transition: background-color 0.25s, box-shadow 0.25s, transform 0.15s;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: scale(0.97);
        }

        .btn-primary:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        .btn-outline-light {
            background: transparent;
            color: #FFFFFF;
            border: 1px solid rgba(255, 255, 255, 0.4);
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            white-space: nowrap;
            transition: background-color 0.25s, border-color 0.25s;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.7);
        }

        /* Footer */
        .site-footer {
            background: var(--secondary);
            color: #CBD5E1;
            margin-top: 80px;
            padding: 56px 0 0;
        }

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

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

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: #94A3B8;
            margin-top: 12px;
            max-width: 320px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #FFFFFF;
        }

        .footer-logo .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 14px;
            font-weight: 800;
            flex-shrink: 0;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: #94A3B8;
            padding: 6px 0;
            transition: color 0.2s;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 16px 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 12px 20px;
            font-size: 13px;
            color: #94A3B8;
            text-align: center;
        }

        .footer-bottom a {
            color: #94A3B8;
            transition: color 0.2s;
        }

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

        .footer-bottom span {
            white-space: nowrap;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-links-desktop {
                gap: 0;
            }
            .nav-links-desktop a {
                padding: 8px 9px;
                font-size: 13px;
            }
            .page-hero-content h1 {
                font-size: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links-desktop {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .nav-cta.desktop-cta {
                display: none;
            }
            .page-hero {
                padding: 40px 0 28px;
            }
            .page-hero .container {
                flex-direction: column;
                gap: 24px;
            }
            .page-hero-content h1 {
                font-size: 28px;
            }
            .page-hero-visual {
                width: 100%;
            }
            .page-hero-visual img {
                height: 180px;
            }
            .news-item {
                flex-direction: column;
                gap: 16px;
                padding: 24px 4px;
            }
            .news-date-block {
                width: auto;
                height: auto;
                flex-direction: row;
                gap: 10px;
                padding: 8px 16px;
                border-radius: 8px;
            }
            .news-date-block .day {
                font-size: 20px;
            }
            .news-date-block .month {
                font-size: 13px;
                align-self: center;
            }
            .cta-section {
                padding: 32px 24px;
                flex-direction: column;
                text-align: center;
            }
            .cta-section-text h2 {
                font-size: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
            .filter-bar {
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .main-nav .container {
                height: 60px;
            }
            .nav-logo {
                font-size: 18px;
            }
            .nav-logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 13px;
            }
            .page-hero-content h1 {
                font-size: 24px;
            }
            .page-hero-content .hero-desc {
                font-size: 14px;
            }
            .news-content h2 {
                font-size: 16px;
            }
            .news-content .news-summary {
                font-size: 14px;
            }
            .cta-section {
                padding: 24px 16px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-light: #EFF6FF;
            --secondary: #0F172A;
            --accent: #38BDF8;
            --bg-page: #F8FAFC;
            --bg-card: #FFFFFF;
            --text-primary: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --success: #10B981;
            --warning: #F59E0B;
            --font-sans: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --shadow-card: 0 4px 18px rgba(0, 0, 0, 0.06);
            --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
            --shadow-nav: 0 2px 12px rgba(0, 0, 0, 0.06);
            --shadow-btn: 0 4px 14px rgba(37, 99, 235, 0.3);
            --radius-card: 14px;
            --radius-btn: 8px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-page);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, opacity 0.25s ease;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (max-width: 640px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }
        .top-info-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .top-info-bar a {
            color: #E2E8F0;
            font-weight: 500;
            transition: color 0.2s;
        }
        .top-info-bar a:hover {
            color: #FFFFFF;
        }
        .top-info-bar .top-cta {
            display: flex;
            align-items: center;
            gap: 6px;
            color: #93C5FD;
            font-weight: 600;
        }
        .top-info-bar .top-cta:hover {
            color: #DBEAFE;
        }
        .main-nav {
            background: var(--bg-card);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-nav);
            border-bottom: 1px solid var(--border);
        }
        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            flex-shrink: 0;
        }
        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .nav-logo .logo-icon span {
            line-height: 1;
        }
        .nav-links-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0 auto;
            flex-wrap: wrap;
        }
        .nav-links-desktop a {
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 6px;
            transition: color 0.2s, background-color 0.2s;
            position: relative;
            white-space: nowrap;
        }
        .nav-links-desktop a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-links-desktop a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-cta {
            background: var(--primary);
            color: #FFFFFF;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: background-color 0.25s, box-shadow 0.25s, transform 0.15s;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
        }
        .nav-cta:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
            transform: translateY(-1px);
        }
        .nav-cta:active {
            transform: scale(0.97);
        }
        .hamburger-btn {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 6px;
            border: 1px solid var(--border);
            background: var(--bg-card);
            transition: background-color 0.2s;
        }
        .hamburger-btn:hover {
            background: var(--primary-light);
        }
        .hamburger-btn span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .hamburger-btn.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger-btn.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger-btn.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .mobile-menu {
            display: none;
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            padding: 16px 0;
            box-shadow: var(--shadow-nav);
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu .container {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-menu a {
            padding: 14px 16px;
            font-size: 17px;
            font-weight: 500;
            color: var(--text-primary);
            border-radius: 8px;
            transition: background-color 0.2s, color 0.2s;
        }
        .mobile-menu a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .mobile-menu a.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-light);
        }
        .mobile-menu .mobile-cta {
            background: var(--primary);
            color: #FFFFFF;
            text-align: center;
            font-weight: 600;
            padding: 14px 16px;
            border-radius: 8px;
            margin-top: 8px;
        }
        .mobile-menu .mobile-cta:hover {
            background: var(--primary-hover);
            color: #FFFFFF;
        }
        @media (max-width: 1024px) {
            .nav-links-desktop {
                display: none;
            }
            .desktop-cta {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
        }
        @media (min-width: 1025px) {
            .mobile-menu {
                display: none !important;
            }
        }
        .article-hero {
            background: linear-gradient(180deg, #EFF6FF 0%, #F8FAFC 100%);
            border-bottom: 1px solid var(--border);
            padding: 56px 0 40px;
        }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-hero .breadcrumb a {
            color: var(--text-secondary);
        }
        .article-hero .breadcrumb a:hover {
            color: var(--primary);
        }
        .article-hero .breadcrumb .sep {
            color: var(--text-muted);
        }
        .article-hero h1 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .article-hero .lead {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 800px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-top: 20px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .article-meta .badge {
            background: var(--primary-light);
            color: var(--primary);
            padding: 4px 12px;
            border-radius: 999px;
            font-weight: 500;
            font-size: 12px;
        }
        .article-body {
            padding: 48px 0 72px;
        }
        .article-body .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
            align-items: start;
        }
        @media (max-width: 900px) {
            .article-body .article-layout {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 40px 44px;
            border: 1px solid var(--border);
        }
        @media (max-width: 640px) {
            .article-content {
                padding: 24px 18px;
            }
        }
        .article-content h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin-top: 40px;
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary-light);
            position: relative;
        }
        .article-content h2:first-of-type {
            margin-top: 0;
        }
        .article-content h2::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 48px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .article-content h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text-primary);
            margin-top: 28px;
            margin-bottom: 12px;
        }
        .article-content p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 18px;
        }
        .article-content .highlight-box {
            background: var(--primary-light);
            border-left: 4px solid var(--primary);
            border-radius: 0 10px 10px 0;
            padding: 18px 22px;
            margin: 24px 0;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
        }
        .article-content .highlight-box strong {
            color: var(--primary);
        }
        .article-content img {
            border-radius: 12px;
            margin: 24px 0;
            box-shadow: var(--shadow-card);
            width: 100%;
            object-fit: cover;
            aspect-ratio: 16/9;
        }
        .article-sidebar {
            position: sticky;
            top: 88px;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px;
            border: 1px solid var(--border);
        }
        .sidebar-card h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .sidebar-card ul li a {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            padding: 8px 12px;
            border-radius: 8px;
            transition: all 0.2s;
            line-height: 1.6;
        }
        .sidebar-card ul li a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .sidebar-card .toc-link.active-link {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
        }
        .sidebar-card .mini-stat {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-card .mini-stat:last-child {
            border-bottom: none;
        }
        .sidebar-card .mini-stat .num {
            font-size: 26px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
        }
        .sidebar-card .mini-stat .label {
            font-size: 13px;
            color: var(--text-muted);
        }
        .data-compare {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            margin: 28px 0;
            border-radius: 14px;
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
        }
        @media (max-width: 640px) {
            .data-compare {
                grid-template-columns: 1fr;
            }
        }
        .data-compare .compare-col {
            padding: 24px 26px;
        }
        .data-compare .compare-col.before {
            background: #F1F5F9;
        }
        .data-compare .compare-col.after {
            background: var(--primary-light);
        }
        .data-compare .compare-col h5 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-primary);
        }
        .data-compare .compare-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .data-compare .compare-col ul li {
            font-size: 14px;
            color: var(--text-secondary);
            display: flex;
            align-items: flex-start;
            gap: 8px;
            line-height: 1.6;
        }
        .data-compare .compare-col ul li .icon {
            flex-shrink: 0;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 10px;
            font-weight: 700;
            margin-top: 3px;
        }
        .data-compare .compare-col.before ul li .icon {
            background: #CBD5E1;
            color: #64748B;
        }
        .data-compare .compare-col.after ul li .icon {
            background: #BFDBFE;
            color: var(--primary);
        }
        .article-cta {
            background: var(--secondary);
            border-radius: var(--radius-card);
            padding: 36px 32px;
            text-align: center;
            margin-top: 32px;
            color: #E2E8F0;
        }
        .article-cta h3 {
            font-size: 22px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
        }
        .article-cta p {
            font-size: 15px;
            color: #CBD5E1;
            margin-bottom: 20px;
        }
        .article-cta .btn-primary {
            display: inline-block;
            background: var(--primary);
            color: #FFFFFF;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            transition: all 0.25s;
            box-shadow: 0 2px 10px rgba(37, 99, 235, 0.3);
        }
        .article-cta .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
            transform: translateY(-2px);
        }
        .site-footer {
            background: var(--secondary);
            color: #CBD5E1;
            padding: 56px 0 0;
            margin-top: auto;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 36px;
        }
        @media (max-width: 900px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 600px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .site-footer .footer-brand p {
            font-size: 14px;
            color: #94A3B8;
            line-height: 1.8;
            margin-top: 14px;
            max-width: 320px;
        }
        .site-footer .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: #FFFFFF;
        }
        .site-footer .footer-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 800;
        }
        .site-footer .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .site-footer .footer-col a {
            display: block;
            font-size: 13px;
            color: #94A3B8;
            padding: 6px 0;
            transition: color 0.2s;
        }
        .site-footer .footer-col a:hover {
            color: #FFFFFF;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 18px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 12px;
            color: #64748B;
        }
        .site-footer .footer-bottom a {
            color: #94A3B8;
            transition: color 0.2s;
        }
        .site-footer .footer-bottom a:hover {
            color: #FFFFFF;
        }
        .top-info-bar {
            background: var(--secondary);
            color: #CBD5E1;
            font-size: 12px;
            padding: 8px 0;
        }
        .top-info-bar .top-left {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .top-info-bar .top-left .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--success);
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.4;
            }
        }
        .btn-outline {
            display: inline-block;
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 14px;
            transition: all 0.25s;
        }
        .btn-outline:hover {
            background: var(--primary-light);
            border-color: var(--primary-hover);
            color: var(--primary-hover);
        }
        .btn-outline:focus {
            outline: 2px solid rgba(37, 99, 235, 0.4);
            outline-offset: 2px;
        }
        .btn-primary:focus {
            outline: 2px solid rgba(37, 99, 235, 0.5);
            outline-offset: 2px;
        }
        .progress-bar-bg {
            background: #E2E8F0;
            border-radius: 999px;
            height: 8px;
            overflow: hidden;
        }
        .progress-bar-fill {
            height: 100%;
            border-radius: 999px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            transition: width 0.8s ease;
        }

/* roulang page: category2 */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-light: #EFF6FF;
            --secondary: #0F172A;
            --accent: #38BDF8;
            --bg-page: #F8FAFC;
            --bg-card: #FFFFFF;
            --text-primary: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --success: #10B981;
            --warning: #F59E0B;
            --font-sans: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --shadow-card: 0 4px 18px rgba(0, 0, 0, 0.06);
            --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
            --shadow-nav: 0 2px 12px rgba(0, 0, 0, 0.06);
            --shadow-btn: 0 4px 14px rgba(37, 99, 235, 0.3);
            --radius-card: 14px;
            --radius-btn: 8px;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-page);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, opacity 0.25s ease;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

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

        .top-info-bar {
            background: var(--secondary);
            color: #E2E8F0;
            font-size: 13px;
            height: 38px;
            display: flex;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .top-info-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .top-info-bar a {
            color: #E2E8F0;
            font-weight: 500;
            transition: color 0.2s;
        }

        .top-info-bar a:hover {
            color: #FFFFFF;
        }

        .top-info-bar .top-cta {
            display: flex;
            align-items: center;
            gap: 6px;
            color: #93C5FD;
            font-weight: 600;
        }

        .top-info-bar .top-cta:hover {
            color: #DBEAFE;
        }

        .main-nav {
            background: var(--bg-card);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-nav);
            border-bottom: 1px solid var(--border);
        }

        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            flex-shrink: 0;
        }

        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
        }

        .nav-logo .logo-icon span {
            line-height: 1;
        }

        .nav-links-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0 auto;
            flex-wrap: wrap;
        }

        .nav-links-desktop a {
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 6px;
            transition: color 0.2s, background-color 0.2s;
            position: relative;
            white-space: nowrap;
        }

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

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

        .nav-links-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-cta {
            background: var(--primary);
            color: #FFFFFF;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: background-color 0.25s, box-shadow 0.25s, transform 0.15s;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
        }

        .nav-cta:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: scale(0.97);
        }

        .hamburger-btn {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 6px;
            border: 1px solid var(--border);
            background: var(--bg-card);
            transition: background-color 0.2s;
        }

        .hamburger-btn:hover {
            background: var(--primary-light);
        }

        .hamburger-btn span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--bg-card);
            z-index: 200;
            padding: 24px;
            overflow-y: auto;
        }

        .mobile-menu.open {
            display: flex;
            flex-direction: column;
        }

        .mobile-menu-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
        }

        .mobile-menu-close {
            font-size: 28px;
            color: var(--text-secondary);
            padding: 4px 8px;
            border-radius: 6px;
            transition: background-color 0.2s;
        }

        .mobile-menu-close:hover {
            background: var(--primary-light);
        }

        .mobile-menu nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu nav a {
            padding: 14px 16px;
            font-size: 18px;
            font-weight: 500;
            color: var(--text-primary);
            border-radius: 8px;
            transition: background-color 0.2s, color 0.2s;
        }

        .mobile-menu nav a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .mobile-menu nav a.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-light);
        }

        .mobile-menu .mobile-cta {
            margin-top: 24px;
            background: var(--primary);
            color: #FFFFFF;
            padding: 14px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            text-align: center;
            transition: background-color 0.25s;
        }

        .mobile-menu .mobile-cta:hover {
            background: var(--primary-hover);
        }

        .page-hero {
            background: linear-gradient(135deg, #EFF6FF 0%, #FFFFFF 70%, #F0F9FF 100%);
            padding: 56px 0 48px;
            position: relative;
            overflow: hidden;
        }

        .page-hero::before {
            content: '28';
            position: absolute;
            right: 40px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 180px;
            font-weight: 800;
            color: rgba(37, 99, 235, 0.04);
            pointer-events: none;
            line-height: 1;
            letter-spacing: -8px;
        }

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

        .page-hero h1 {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .page-hero .hero-desc {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.8;
        }

        .section-block {
            padding: 48px 0;
        }

        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: -0.3px;
        }

        .section-sub {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 640px;
            line-height: 1.7;
        }

        .benefit-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px 24px;
            transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
            border: 1px solid transparent;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .benefit-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-color: var(--primary-light);
        }

        .benefit-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            color: var(--primary);
            flex-shrink: 0;
        }

        .benefit-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

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

        .benefit-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 500;
            padding: 3px 10px;
            border-radius: 999px;
            margin-top: 12px;
            align-self: flex-start;
        }

        .tag-hot {
            background: #FEF2F2;
            color: #DC2626;
        }

        .tag-new {
            background: #ECFDF5;
            color: #059669;
        }

        .tag-popular {
            background: #FFFBEB;
            color: #D97706;
        }

        .tag-core {
            background: var(--primary-light);
            color: var(--primary);
        }

        .tier-card {
            background: var(--bg-card);
            border-radius: 16px;
            box-shadow: var(--shadow-card);
            padding: 32px 28px;
            border: 2px solid var(--border);
            transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
            position: relative;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .tier-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .tier-card.featured {
            border-color: var(--primary);
            background: linear-gradient(160deg, #FFFFFF 60%, #EFF6FF 100%);
        }

        .tier-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

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

        .tier-list {
            list-style: none;
            padding: 0;
            margin: 0 0 20px;
            flex-grow: 1;
        }

        .tier-list li {
            font-size: 14px;
            color: var(--text-secondary);
            padding: 6px 0;
            border-bottom: 1px solid #F1F5F9;
            display: flex;
            align-items: flex-start;
            gap: 8px;
            line-height: 1.6;
        }

        .tier-list li::before {
            content: '✓';
            color: var(--primary);
            font-weight: 700;
            flex-shrink: 0;
            margin-top: 1px;
        }

        .tier-btn {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
            border-radius: var(--radius-btn);
            padding: 10px 20px;
            font-size: 14px;
            font-weight: 600;
            text-align: center;
            transition: background-color 0.25s, color 0.25s, box-shadow 0.25s;
        }

        .tier-btn:hover {
            background: var(--primary-light);
            color: var(--primary-hover);
        }

        .tier-card.featured .tier-btn {
            background: var(--primary);
            color: #FFFFFF;
            border-color: var(--primary);
        }

        .tier-card.featured .tier-btn:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: 10px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
            border: 1px solid var(--border);
            margin-bottom: 12px;
            overflow: hidden;
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            transition: color 0.2s, background-color 0.2s;
        }

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

        .faq-question .faq-icon {
            font-size: 20px;
            color: var(--text-muted);
            transition: transform 0.3s ease;
            flex-shrink: 0;
            margin-left: 12px;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 20px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0;
            padding-top: 0;
            border-top: 1px solid #F1F5F9;
            padding-top: 12px;
        }

        .site-footer {
            background: var(--secondary);
            color: #CBD5E1;
            margin-top: auto;
            padding-top: 48px;
        }

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

        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 12px;
        }

        .footer-brand .footer-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 800;
        }

        .footer-brand p {
            font-size: 13px;
            color: #94A3B8;
            line-height: 1.7;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 14px;
        }

        .footer-col a {
            display: block;
            font-size: 13px;
            color: #94A3B8;
            padding: 4px 0;
            transition: color 0.2s;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 16px 0;
            font-size: 12px;
            color: #64748B;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 8px;
        }

        .footer-bottom a {
            color: #94A3B8;
            transition: color 0.2s;
        }

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

        .form-card {
            background: var(--bg-card);
            border-radius: 16px;
            box-shadow: var(--shadow-card);
            padding: 36px 32px;
            border: 1px solid var(--border);
        }

        .form-input {
            width: 100%;
            padding: 10px 14px;
            border-radius: 8px;
            border: 1px solid var(--border);
            background: var(--bg-card);
            font-size: 14px;
            color: var(--text-primary);
            transition: border-color 0.2s, box-shadow 0.2s;
            outline: none;
        }

        .form-input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
        }

        .form-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 4px;
            display: block;
        }

        .btn-primary {
            background: var(--primary);
            color: #FFFFFF;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            transition: background-color 0.25s, box-shadow 0.25s, transform 0.15s;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
            display: inline-block;
            text-align: center;
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: scale(0.97);
        }

        .btn-secondary {
            background: transparent;
            color: var(--primary);
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            border: 1px solid var(--primary);
            transition: background-color 0.25s, color 0.25s;
            display: inline-block;
            text-align: center;
        }

        .btn-secondary:hover {
            background: var(--primary-light);
            color: var(--primary-hover);
        }

        @media (max-width: 1024px) {
            .nav-links-desktop {
                gap: 0;
            }
            .nav-links-desktop a {
                padding: 8px 10px;
                font-size: 13px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            .nav-links-desktop {
                display: none;
            }
            .desktop-cta {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .page-hero {
                padding: 36px 0 32px;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .page-hero .hero-desc {
                font-size: 15px;
            }
            .section-block {
                padding: 32px 0;
            }
            .section-title {
                font-size: 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 24px;
            }
            .benefit-card {
                padding: 20px 16px;
            }
            .tier-card {
                padding: 24px 18px;
            }
            .form-card {
                padding: 24px 18px;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-light: #EFF6FF;
            --secondary: #0F172A;
            --accent: #38BDF8;
            --bg-page: #F8FAFC;
            --bg-card: #FFFFFF;
            --text-primary: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --success: #10B981;
            --warning: #F59E0B;
            --font-sans: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --shadow-card: 0 4px 18px rgba(0, 0, 0, 0.06);
            --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
            --shadow-nav: 0 2px 12px rgba(0, 0, 0, 0.06);
            --shadow-btn: 0 4px 14px rgba(37, 99, 235, 0.3);
            --radius-card: 14px;
            --radius-btn: 8px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-page);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, opacity 0.25s ease, transform 0.2s ease;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (max-width: 640px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }
        .top-info-bar {
            background: var(--secondary);
            color: #E2E8F0;
            font-size: 13px;
            padding: 8px 0;
            position: relative;
            z-index: 101;
        }
        .top-info-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 12px;
            flex-wrap: wrap;
        }
        .top-info-bar a {
            color: #E2E8F0;
            font-weight: 500;
            transition: color 0.2s;
        }
        .top-info-bar a:hover {
            color: #FFFFFF;
        }
        .top-info-bar .top-cta {
            display: flex;
            align-items: center;
            gap: 6px;
            color: #93C5FD;
            font-weight: 600;
            white-space: nowrap;
        }
        .top-info-bar .top-cta:hover {
            color: #DBEAFE;
        }
        .top-info-bar .top-domain {
            color: #94A3B8;
            font-weight: 400;
        }
        @media (max-width: 480px) {
            .top-info-bar .top-domain {
                display: none;
            }
            .top-info-bar .container {
                justify-content: center;
            }
        }
        .main-nav {
            background: var(--bg-card);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-nav);
            border-bottom: 1px solid var(--border);
        }
        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
            position: relative;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            flex-shrink: 0;
            transition: opacity 0.2s;
        }
        .nav-logo:hover {
            opacity: 0.85;
        }
        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
            position: relative;
        }
        .nav-logo .logo-icon::after {
            content: '';
            position: absolute;
            top: -2px;
            right: -2px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
            border: 2px solid #FFFFFF;
        }
        .nav-logo .logo-icon span {
            line-height: 1;
        }
        .nav-links-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0 auto;
            flex-wrap: wrap;
        }
        .nav-links-desktop a {
            padding: 8px 13px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 6px;
            transition: color 0.2s, background-color 0.2s;
            position: relative;
            white-space: nowrap;
        }
        .nav-links-desktop a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-links-desktop a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 13px;
            right: 13px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-cta {
            background: var(--primary);
            color: #FFFFFF;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: background-color 0.25s, box-shadow 0.25s, transform 0.15s;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
            flex-shrink: 0;
        }
        .nav-cta:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
            transform: translateY(-1px);
        }
        .nav-cta:active {
            transform: scale(0.97);
        }
        @media (max-width: 1024px) {
            .nav-links-desktop {
                display: none;
            }
            .desktop-cta {
                display: none;
            }
        }
        @media (min-width: 1025px) {
            .hamburger-btn {
                display: none !important;
            }
        }
        .hamburger-btn {
            display: flex;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 6px;
            border: 1px solid var(--border);
            background: var(--bg-card);
            transition: background-color 0.2s;
            z-index: 110;
            position: relative;
        }
        .hamburger-btn:hover {
            background: var(--primary-light);
        }
        .hamburger-btn span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .hamburger-btn.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger-btn.open span:nth-child(2) {
            opacity: 0;
        }
        .hamburger-btn.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--bg-card);
            z-index: 105;
            padding: 80px 24px 24px;
            overflow-y: auto;
            flex-direction: column;
            gap: 8px;
        }
        .mobile-menu.show {
            display: flex;
        }
        .mobile-menu a {
            padding: 14px 8px;
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            border-bottom: 1px solid var(--border);
            transition: color 0.2s, padding-left 0.2s;
            display: block;
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--primary);
            padding-left: 16px;
        }
        .mobile-menu .mobile-cta {
            margin-top: 16px;
            background: var(--primary);
            color: #FFFFFF;
            text-align: center;
            border-radius: var(--radius-btn);
            padding: 14px;
            font-weight: 600;
            border-bottom: none;
        }
        .mobile-menu .mobile-cta:hover {
            background: var(--primary-hover);
            color: #FFFFFF;
            padding-left: 14px;
        }
        @media (min-width: 1025px) {
            .mobile-menu {
                display: none !important;
            }
        }
        main {
            flex: 1;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--primary);
            color: #FFFFFF;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            transition: background-color 0.25s, box-shadow 0.25s, transform 0.15s;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
            cursor: pointer;
            border: none;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: scale(0.97);
        }
        .btn-primary:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.4);
            outline-offset: 2px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            padding: 11px 26px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            border: 1.5px solid var(--primary);
            transition: background-color 0.25s, color 0.25s, transform 0.15s;
            cursor: pointer;
        }
        .btn-outline:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
        }
        .btn-outline:active {
            transform: scale(0.97);
        }
        .btn-outline:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.3);
            outline-offset: 2px;
        }
        .section-badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .section-title {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        @media (max-width: 640px) {
            .section-title {
                font-size: 22px;
            }
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 760px;
        }
        .data-hero {
            background: linear-gradient(135deg, #EFF6FF 0%, #FFFFFF 50%, #F0F9FF 100%);
            padding: 60px 0 48px;
            border-bottom: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }
        .data-hero::before {
            content: '28';
            position: absolute;
            top: 20px;
            right: 5%;
            font-size: 180px;
            font-weight: 800;
            color: rgba(37, 99, 235, 0.05);
            line-height: 1;
            pointer-events: none;
            user-select: none;
            z-index: 0;
        }
        .data-hero .container {
            position: relative;
            z-index: 1;
        }
        .data-hero h1 {
            font-size: 40px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 16px;
            line-height: 1.25;
        }
        @media (max-width: 640px) {
            .data-hero h1 {
                font-size: 28px;
            }
        }
        .data-hero .hero-desc {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 680px;
            margin-bottom: 20px;
        }
        .data-hero .hero-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 14px;
            color: var(--text-muted);
        }
        .data-hero .hero-meta .dot {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--accent);
        }
        .data-hero .hero-img-wrap {
            margin-top: 28px;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            max-width: 680px;
        }
        .data-hero .hero-img-wrap img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .metrics-section {
            padding: 56px 0 32px;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        @media (max-width: 1024px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .metrics-grid {
                grid-template-columns: 1fr;
            }
        }
        .metric-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            padding: 26px 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: box-shadow 0.25s, transform 0.2s, border-color 0.2s;
            position: relative;
            overflow: hidden;
        }
        .metric-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: #C7D9F0;
        }
        .metric-card .metric-label {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-muted);
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }
        .metric-card .metric-value {
            font-size: 38px;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.2;
            margin-bottom: 6px;
            font-variant-numeric: tabular-nums;
        }
        @media (max-width: 640px) {
            .metric-card .metric-value {
                font-size: 30px;
            }
        }
        .metric-card .metric-trend {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
        }
        .metric-card .metric-trend.up {
            color: var(--success);
        }
        .metric-card .metric-trend.steady {
            color: var(--primary);
        }
        .metric-card .metric-note {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 6px;
        }
        .metric-card .metric-icon {
            position: absolute;
            top: 18px;
            right: 18px;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            background: var(--primary-light);
            color: var(--primary);
        }
        .trend-section {
            padding: 48px 0;
        }
        .trend-section .trend-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin-top: 24px;
        }
        @media (max-width: 768px) {
            .trend-section .trend-grid {
                grid-template-columns: 1fr;
            }
        }
        .trend-block {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            padding: 28px 28px 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
        }
        .trend-block h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .trend-block p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 12px;
        }
        .trend-block .trend-chart {
            margin-top: 16px;
            padding: 16px;
            background: var(--bg-page);
            border-radius: 10px;
            display: flex;
            align-items: flex-end;
            gap: 8px;
            height: 120px;
        }
        .trend-chart .bar {
            flex: 1;
            border-radius: 4px 4px 0 0;
            background: var(--primary);
            min-height: 20px;
            transition: opacity 0.3s;
            position: relative;
        }
        .trend-chart .bar:hover {
            opacity: 0.8;
        }
        .trend-chart .bar:nth-child(odd) {
            background: var(--accent);
        }
        .trend-chart .bar:nth-child(3n) {
            background: #60A5FA;
        }
        .compare-section {
            padding: 48px 0 56px;
        }
        .compare-section .compare-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-top: 28px;
            align-items: stretch;
        }
        @media (max-width: 768px) {
            .compare-section .compare-grid {
                grid-template-columns: 1fr;
            }
        }
        .compare-card {
            border-radius: var(--radius-card);
            padding: 28px 26px;
            box-shadow: var(--shadow-card);
            border: 1.5px solid var(--border);
            transition: box-shadow 0.3s, transform 0.25s;
        }
        .compare-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .compare-card.before {
            background: #F1F5F9;
            border-color: #E2E8F0;
        }
        .compare-card.after {
            background: #FFFFFF;
            border-color: var(--primary);
            box-shadow: 0 6px 24px rgba(37, 99, 235, 0.12);
        }
        .compare-card .compare-header {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .compare-card.before .compare-header {
            color: var(--text-muted);
        }
        .compare-card.after .compare-header {
            color: var(--primary);
        }
        .compare-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .compare-card ul li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
            padding: 8px 12px;
            border-radius: 8px;
            transition: background-color 0.2s;
        }
        .compare-card ul li:hover {
            background: rgba(37, 99, 235, 0.05);
        }
        .compare-card.before ul li .icon {
            color: var(--text-muted);
        }
        .compare-card.after ul li .icon {
            color: var(--primary);
        }
        .compare-card ul li .icon {
            font-size: 15px;
            flex-shrink: 0;
            width: 20px;
            text-align: center;
        }
        .insight-section {
            padding: 40px 0 56px;
        }
        .insight-section .insight-block {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            padding: 30px 28px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            margin-top: 24px;
        }
        .insight-block h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
        }
        .insight-block p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 14px;
        }
        .insight-block .insight-list {
            list-style: none;
            padding: 0;
            margin: 8px 0 12px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .insight-block .insight-list li {
            font-size: 14px;
            color: var(--text-secondary);
            padding-left: 22px;
            position: relative;
            line-height: 1.7;
        }
        .insight-block .insight-list li::before {
            content: '▸';
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: 700;
        }
        .cta-section {
            padding: 56px 0;
            background: linear-gradient(135deg, #EFF6FF 0%, #F8FAFC 60%, #FFFFFF 100%);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .cta-card {
            background: var(--bg-card);
            border-radius: 16px;
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }
        @media (max-width: 640px) {
            .cta-card {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        .cta-card .cta-text h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .cta-card .cta-text p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 480px;
            line-height: 1.7;
        }
        .site-footer {
            background: var(--secondary);
            color: #CBD5E1;
            padding: 48px 0 0;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 14px;
        }
        .footer-brand .footer-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 14px;
            font-weight: 800;
        }
        .footer-brand p {
            font-size: 14px;
            color: #94A3B8;
            line-height: 1.8;
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            font-size: 13px;
            color: #94A3B8;
            padding: 6px 0;
            transition: color 0.2s, padding-left 0.2s;
        }
        .footer-col a:hover {
            color: #FFFFFF;
            padding-left: 6px;
        }
        .footer-bottom {
            padding: 16px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: #64748B;
        }
        @media (max-width: 640px) {
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        .footer-bottom a {
            color: #94A3B8;
            transition: color 0.2s;
        }
        .footer-bottom a:hover {
            color: #FFFFFF;
        }

/* roulang page: category5 */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-light: #EFF6FF;
            --secondary: #0F172A;
            --accent: #38BDF8;
            --bg-page: #F8FAFC;
            --bg-card: #FFFFFF;
            --text-primary: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --success: #10B981;
            --warning: #F59E0B;
            --font-sans: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --shadow-card: 0 4px 18px rgba(0, 0, 0, 0.06);
            --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
            --shadow-nav: 0 2px 12px rgba(0, 0, 0, 0.06);
            --shadow-btn: 0 4px 14px rgba(37, 99, 235, 0.3);
            --radius-card: 14px;
            --radius-btn: 8px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-page);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, opacity 0.25s ease;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (max-width: 640px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }
        /* Top info bar */
        .top-info-bar {
            background: var(--secondary);
            padding: 6px 0;
            font-size: 13px;
            position: relative;
            z-index: 101;
        }
        .top-info-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .top-info-bar a {
            color: #E2E8F0;
            font-weight: 500;
            transition: color 0.2s;
        }
        .top-info-bar a:hover {
            color: #FFFFFF;
        }
        .top-info-bar .top-left {
            color: #94A3B8;
            letter-spacing: 0.3px;
        }
        .top-info-bar .top-cta {
            display: flex;
            align-items: center;
            gap: 6px;
            color: #93C5FD;
            font-weight: 600;
        }
        .top-info-bar .top-cta:hover {
            color: #DBEAFE;
        }
        .top-info-bar .top-cta svg {
            width: 14px;
            height: 14px;
        }
        /* Main navigation */
        .main-nav {
            background: var(--bg-card);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-nav);
            border-bottom: 1px solid var(--border);
        }
        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            flex-shrink: 0;
        }
        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .nav-logo .logo-icon span {
            line-height: 1;
        }
        .nav-links-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0 auto;
            flex-wrap: wrap;
        }
        .nav-links-desktop a {
            padding: 8px 12px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 6px;
            transition: color 0.2s, background-color 0.2s;
            position: relative;
            white-space: nowrap;
        }
        .nav-links-desktop a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-links-desktop a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 12px;
            right: 12px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-cta {
            background: var(--primary);
            color: #FFFFFF;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: background-color 0.25s, box-shadow 0.25s, transform 0.15s;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
            flex-shrink: 0;
        }
        .nav-cta:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
            transform: translateY(-1px);
        }
        .nav-cta:active {
            transform: scale(0.97);
        }
        /* Hamburger */
        .hamburger-btn {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 6px;
            border: 1px solid var(--border);
            background: var(--bg-card);
            transition: background-color 0.2s;
        }
        .hamburger-btn:hover {
            background: var(--primary-light);
        }
        .hamburger-btn span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .hamburger-btn.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger-btn.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger-btn.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        /* Mobile drawer */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--bg-card);
            z-index: 99;
            padding-top: 80px;
            overflow-y: auto;
        }
        .mobile-drawer.open {
            display: block;
        }
        .mobile-drawer nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            padding: 16px 24px;
        }
        .mobile-drawer nav a {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            padding: 14px 12px;
            border-radius: 8px;
            transition: background-color 0.2s, color 0.2s;
            border-bottom: 1px solid var(--border);
        }
        .mobile-drawer nav a:hover,
        .mobile-drawer nav a.active {
            color: var(--primary);
            background: var(--primary-light);
        }
        .mobile-drawer .drawer-cta {
            margin: 16px 24px 32px;
            display: block;
            text-align: center;
            background: var(--primary);
            color: #FFFFFF;
            padding: 14px 24px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            transition: background-color 0.25s;
        }
        .mobile-drawer .drawer-cta:hover {
            background: var(--primary-hover);
        }
        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: var(--text-muted);
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 500;
        }
        /* Step Hero */
        .step-hero {
            background: linear-gradient(180deg, #EFF6FF 0%, #FFFFFF 100%);
            padding: 64px 0 72px;
            position: relative;
            overflow: hidden;
        }
        .step-hero::before {
            content: '28';
            position: absolute;
            right: -40px;
            top: 20px;
            font-size: 280px;
            font-weight: 800;
            color: rgba(37, 99, 235, 0.04);
            pointer-events: none;
            line-height: 1;
            letter-spacing: -10px;
        }
        .step-hero .container {
            display: grid;
            grid-template-columns: 1fr 420px;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .step-hero h1 {
            font-size: 40px;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .step-hero .hero-sub {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 28px;
            max-width: 560px;
        }
        .step-hero .hero-cta-group {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }
        .btn-primary {
            background: var(--primary);
            color: #FFFFFF;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            transition: background-color 0.25s, box-shadow 0.25s, transform 0.15s;
            box-shadow: 0 2px 10px rgba(37, 99, 235, 0.25);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: scale(0.97);
        }
        .btn-secondary {
            background: transparent;
            color: var(--primary);
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            border: 1px solid var(--primary);
            transition: background-color 0.25s, border-color 0.25s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-secondary:hover {
            background: var(--primary-light);
            border-color: var(--primary-hover);
        }
        .step-hero .hero-trust {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-muted);
        }
        .step-hero .hero-trust span {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .step-hero .hero-trust svg {
            width: 16px;
            height: 16px;
            color: var(--success);
        }
        .step-hero .hero-image-wrapper {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
        }
        .step-hero .hero-image-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        /* Step overview pills */
        .step-overview {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 4px;
        }
        .step-overview .step-pill {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 4px 14px;
            font-size: 12px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .step-overview .step-pill .num {
            background: var(--primary);
            color: #FFFFFF;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 10px;
            font-weight: 700;
        }
        /* Section title */
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 20px;
            margin-bottom: 12px;
        }
        .section-title h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.35;
            letter-spacing: -0.3px;
        }
        .section-title p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-top: 10px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }
        /* Timeline steps */
        .steps-section {
            padding: 72px 0 80px;
        }
        .timeline-wrapper {
            position: relative;
            max-width: 780px;
            margin: 0 auto;
        }
        .timeline-wrapper::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 32px;
            width: 2px;
            background: linear-gradient(180deg, var(--primary) 0%, var(--accent) 100%);
            border-radius: 2px;
            opacity: 0.3;
        }
        .step-card {
            position: relative;
            padding-left: 84px;
            margin-bottom: 36px;
            transition: transform 0.3s ease;
        }
        .step-card:last-child {
            margin-bottom: 0;
        }
        .step-card .step-number-wrapper {
            position: absolute;
            left: 4px;
            top: 0;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 3px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
            z-index: 2;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
            transition: background-color 0.3s, color 0.3s;
        }
        .step-card:hover .step-number-wrapper {
            background: var(--primary);
            color: #FFFFFF;
        }
        .step-card .step-card-inner {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            padding: 28px 32px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: box-shadow 0.3s, transform 0.3s;
        }
        .step-card:hover .step-card-inner {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .step-card .step-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }
        .step-card .step-phase {
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 20px;
            background: var(--primary-light);
            color: var(--primary);
        }
        .step-card .step-phase.phase-accent {
            background: #F0F9FF;
            color: #0284C7;
        }
        .step-card .step-phase.phase-success {
            background: #ECFDF5;
            color: #059669;
        }
        .step-card .step-title {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .step-card .step-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .step-card .step-extra {
            margin-top: 14px;
            padding-top: 14px;
            border-top: 1px dashed var(--border);
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .step-card .step-extra svg {
            width: 16px;
            height: 16px;
            color: var(--accent);
            flex-shrink: 0;
        }
        /* Preparation checklist */
        .checklist-section {
            padding: 64px 0 72px;
            background: #FFFFFF;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .checklist-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            max-width: 970px;
            margin: 0 auto;
        }
        .checklist-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 22px 20px;
            text-align: center;
            transition: border-color 0.25s, box-shadow 0.25s;
        }
        .checklist-item:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-card);
        }
        .checklist-item .check-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 10px;
            color: var(--primary);
        }
        .checklist-item .check-icon svg {
            width: 18px;
            height: 18px;
        }
        .checklist-item h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .checklist-item p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        /* Info panel */
        .info-panel-section {
            padding: 64px 0;
        }
        .info-panel-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            max-width: 900px;
            margin: 0 auto;
        }
        .info-panel {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            padding: 28px 30px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
        }
        .info-panel h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .info-panel h3 svg {
            width: 20px;
            height: 20px;
            color: var(--primary);
        }
        .info-panel ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .info-panel ul li {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            padding: 6px 0;
            display: flex;
            align-items: flex-start;
            gap: 8px;
            border-bottom: 1px solid #F1F5F9;
        }
        .info-panel ul li:last-child {
            border-bottom: none;
        }
        .info-panel ul li svg {
            width: 16px;
            height: 16px;
            color: var(--success);
            flex-shrink: 0;
            margin-top: 4px;
        }
        /* Mini FAQ */
        .mini-faq-section {
            padding: 60px 0 72px;
            background: #FFFFFF;
            border-top: 1px solid var(--border);
        }
        .mini-faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .mini-faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 12px;
            overflow: hidden;
            transition: border-color 0.25s, box-shadow 0.25s;
        }
        .mini-faq-item:hover {
            border-color: #BFDBFE;
            box-shadow: var(--shadow-card);
        }
        .mini-faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            transition: color 0.2s;
            gap: 16px;
            user-select: none;
        }
        .mini-faq-item .faq-question:hover {
            color: var(--primary);
        }
        .mini-faq-item .faq-question .faq-icon {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 16px;
            font-weight: 700;
            flex-shrink: 0;
            transition: transform 0.3s, background-color 0.3s;
        }
        .mini-faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #FFFFFF;
        }
        .mini-faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .mini-faq-item .faq-answer-inner {
            padding: 0 22px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }
        /* CTA section */
        .cta-section {
            padding: 72px 0 80px;
        }
        .cta-card {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
            border-radius: var(--radius-card);
            padding: 48px 40px;
            text-align: center;
            box-shadow: 0 12px 40px rgba(37, 99, 235, 0.25);
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-card h2 {
            font-size: 28px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .cta-card p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 24px;
            line-height: 1.7;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-card .btn-white {
            background: #FFFFFF;
            color: var(--primary);
            padding: 13px 32px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 700;
            transition: background-color 0.25s, box-shadow 0.25s, transform 0.15s;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .cta-card .btn-white:hover {
            background: #F0F4FF;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.2);
            transform: translateY(-1px);
        }
        .cta-card .btn-white:active {
            transform: scale(0.97);
        }
        /* Footer */
        .site-footer {
            background: var(--secondary);
            padding: 56px 0 0;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 36px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 14px;
        }
        .footer-brand .footer-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .footer-brand p {
            font-size: 14px;
            color: #94A3B8;
            line-height: 1.75;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 14px;
        }
        .footer-col a {
            display: block;
            font-size: 13px;
            color: #94A3B8;
            padding: 5px 0;
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: #FFFFFF;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            padding: 18px 0;
            font-size: 12px;
            color: #64748B;
        }
        .footer-bottom a {
            color: #94A3B8;
            transition: color 0.2s;
        }
        .footer-bottom a:hover {
            color: #FFFFFF;
        }
        .footer-bottom span {
            white-space: nowrap;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .step-hero .container {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .step-hero .hero-image-wrapper {
                max-height: 280px;
                overflow: hidden;
            }
            .checklist-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 768px) {
            .nav-links-desktop {
                display: none;
            }
            .desktop-cta {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .step-hero h1 {
                font-size: 28px;
            }
            .step-hero {
                padding: 40px 0 48px;
            }
            .step-hero .hero-sub {
                font-size: 15px;
            }
            .section-title h2 {
                font-size: 23px;
            }
            .steps-section {
                padding: 48px 0 56px;
            }
            .timeline-wrapper::before {
                left: 24px;
            }
            .step-card {
                padding-left: 60px;
                margin-bottom: 24px;
            }
            .step-card .step-number-wrapper {
                left: 0;
                width: 48px;
                height: 48px;
                font-size: 17px;
            }
            .step-card .step-card-inner {
                padding: 20px 18px;
            }
            .step-card .step-title {
                font-size: 17px;
            }
            .info-panel-grid {
                grid-template-columns: 1fr;
            }
            .cta-card {
                padding: 32px 22px;
            }
            .cta-card h2 {
                font-size: 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }
        @media (max-width: 520px) {
            .checklist-grid {
                grid-template-columns: 1fr;
            }
            .step-overview .step-pill {
                font-size: 11px;
                padding: 3px 10px;
            }
            .step-hero .hero-cta-group {
                flex-direction: column;
            }
            .btn-primary,
            .btn-secondary {
                text-align: center;
                justify-content: center;
            }
        }
        @media (min-width: 769px) {
            .mobile-drawer {
                display: none !important;
            }
        }

/* roulang page: category6 */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-light: #EFF6FF;
            --secondary: #0F172A;
            --accent: #38BDF8;
            --bg-page: #F8FAFC;
            --bg-card: #FFFFFF;
            --text-primary: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --success: #10B981;
            --warning: #F59E0B;
            --font-sans: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --shadow-card: 0 4px 18px rgba(0, 0, 0, 0.06);
            --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
            --shadow-nav: 0 2px 12px rgba(0, 0, 0, 0.06);
            --shadow-btn: 0 4px 14px rgba(37, 99, 235, 0.3);
            --radius-card: 14px;
            --radius-btn: 8px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-page);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, opacity 0.25s ease;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (max-width: 640px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* Top info bar */
        .top-info-bar {
            background: var(--secondary);
            color: #E2E8F0;
            font-size: 13px;
            padding: 8px 0;
            position: relative;
            z-index: 101;
        }
        .top-info-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .top-info-bar a {
            color: #E2E8F0;
            font-weight: 500;
            transition: color 0.2s;
        }
        .top-info-bar a:hover {
            color: #FFFFFF;
        }
        .top-info-bar .top-cta {
            display: flex;
            align-items: center;
            gap: 6px;
            color: #93C5FD;
            font-weight: 600;
        }
        .top-info-bar .top-cta:hover {
            color: #DBEAFE;
        }

        /* Main navigation */
        .main-nav {
            background: var(--bg-card);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-nav);
            border-bottom: 1px solid var(--border);
        }
        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            flex-shrink: 0;
        }
        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .nav-logo .logo-icon span {
            line-height: 1;
        }
        .nav-links-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0 auto;
            flex-wrap: wrap;
        }
        .nav-links-desktop a {
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 6px;
            transition: color 0.2s, background-color 0.2s;
            position: relative;
            white-space: nowrap;
        }
        .nav-links-desktop a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-links-desktop a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-cta {
            background: var(--primary);
            color: #FFFFFF;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: background-color 0.25s, box-shadow 0.25s, transform 0.15s;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
            display: inline-block;
        }
        .nav-cta:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
            transform: translateY(-1px);
        }
        .nav-cta:active {
            transform: scale(0.97);
        }
        .hamburger-btn {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 6px;
            border: 1px solid var(--border);
            background: var(--bg-card);
            transition: background-color 0.2s;
        }
        .hamburger-btn:hover {
            background: var(--primary-light);
        }
        .hamburger-btn span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .hamburger-btn.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger-btn.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger-btn.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .mobile-menu {
            display: none;
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            padding: 16px 24px 24px;
            position: absolute;
            top: 68px;
            left: 0;
            right: 0;
            z-index: 99;
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu a {
            display: block;
            padding: 12px 16px;
            font-size: 18px;
            font-weight: 500;
            color: var(--text-primary);
            border-radius: 6px;
            transition: background-color 0.2s, color 0.2s;
        }
        .mobile-menu a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .mobile-menu a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .mobile-menu .mobile-cta {
            margin-top: 12px;
            background: var(--primary);
            color: #FFFFFF;
            text-align: center;
            font-weight: 600;
            padding: 14px;
            border-radius: var(--radius-btn);
        }
        .mobile-menu .mobile-cta:hover {
            background: var(--primary-hover);
            color: #FFFFFF;
        }

        /* Hero */
        .resource-hero {
            background: linear-gradient(180deg, #EFF6FF 0%, #F8FAFC 100%);
            padding: 72px 0 80px;
            border-bottom: 1px solid var(--border);
        }
        .resource-hero .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 20px;
            margin-bottom: 20px;
        }
        .resource-hero h1 {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .resource-hero .hero-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 28px;
            max-width: 520px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #FFFFFF;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            transition: background-color 0.25s, box-shadow 0.25s, transform 0.15s;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: scale(0.97);
        }
        .btn-secondary-plain {
            background: transparent;
            color: var(--primary);
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            border: 1px solid var(--primary);
            transition: background-color 0.25s, border-color 0.25s, transform 0.15s;
        }
        .btn-secondary-plain:hover {
            background: var(--primary-light);
            border-color: var(--primary);
        }
        .btn-secondary-plain:active {
            transform: scale(0.97);
        }
        .hero-form-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 32px;
            border: 1px solid var(--border);
        }
        .hero-form-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .hero-form-card .form-intro {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 18px;
        }
        .form-group {
            margin-bottom: 14px;
        }
        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 6px;
        }
        .form-group input,
        .form-group select {
            width: 100%;
            padding: 10px 14px;
            border-radius: 8px;
            border: 1px solid var(--border);
            font-size: 14px;
            color: var(--text-primary);
            background: var(--bg-card);
            transition: border-color 0.2s, box-shadow 0.2s;
            appearance: none;
            outline: none;
        }
        .form-group input:focus,
        .form-group select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
        }
        .form-submit {
            width: 100%;
            background: var(--primary);
            color: #FFFFFF;
            padding: 12px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            transition: background-color 0.25s, box-shadow 0.25s;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
        }
        .form-submit:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
        }

        /* Section general */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-card);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .section-heading {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: -0.3px;
        }
        .section-lead {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 32px;
            max-width: 680px;
        }

        /* Resource features */
        .features-grid {
            display: grid;
            grid-template-columns: 1fr 0.85fr;
            gap: 48px;
            align-items: center;
        }
        .features-list {
            display: grid;
            gap: 20px;
        }
        .feature-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            padding: 18px 20px;
            background: var(--bg-card);
            border-radius: 12px;
            border: 1px solid var(--border);
            transition: border-color 0.25s, box-shadow 0.25s, transform 0.15s;
        }
        .feature-item:hover {
            border-color: #BFDBFE;
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
        }
        .feature-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
            font-weight: 700;
        }
        .feature-item h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .feature-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .resource-image-wrap {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
        }
        .resource-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        /* Resource list */
        .resource-list {
            display: grid;
            gap: 16px;
        }
        .resource-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 20px 24px;
            background: var(--bg-card);
            border-radius: 12px;
            border: 1px solid var(--border);
            transition: border-color 0.25s, box-shadow 0.25s, transform 0.15s, background-color 0.25s;
        }
        .resource-item:hover {
            border-color: #BFDBFE;
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
            background-color: #FAFCFF;
        }
        .resource-main {
            flex: 1;
            min-width: 0;
        }
        .resource-main h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .resource-main p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .resource-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            flex-wrap: wrap;
        }
        .tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 6px;
            font-size: 12px;
            font-weight: 600;
            white-space: nowrap;
        }
        .tag-blue {
            background: var(--primary-light);
            color: var(--primary);
        }
        .tag-green {
            background: #ECFDF5;
            color: #059669;
        }
        .tag-amber {
            background: #FFFBEB;
            color: #D97706;
        }
        .btn-resource {
            background: var(--primary);
            color: #FFFFFF;
            padding: 8px 18px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 13px;
            white-space: nowrap;
            transition: background-color 0.25s, box-shadow 0.25s, transform 0.15s;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .btn-resource:hover {
            background: var(--primary-hover);
            box-shadow: 0 2px 10px rgba(37, 99, 235, 0.3);
        }
        .btn-resource:active {
            transform: scale(0.96);
        }

        /* Scenarios */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .scenario-card {
            padding: 24px;
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            transition: border-color 0.25s, box-shadow 0.25s;
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .scenario-card:hover {
            border-color: #BFDBFE;
            box-shadow: var(--shadow-card);
        }
        .scenario-number {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary);
            color: #FFFFFF;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 15px;
            flex-shrink: 0;
        }
        .scenario-card h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .scenario-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* Steps */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .step-card {
            padding: 28px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            text-align: center;
            transition: border-color 0.25s, box-shadow 0.25s, transform 0.15s;
        }
        .step-card:hover {
            border-color: #BFDBFE;
            box-shadow: var(--shadow-card);
            transform: translateY(-3px);
        }
        .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            margin: 0 auto 14px;
        }
        .step-card h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* FAQ */
        .faq-list {
            display: grid;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: 12px;
            border: 1px solid var(--border);
            overflow: hidden;
            transition: border-color 0.25s;
        }
        .faq-item.open {
            border-color: #93C5FD;
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            transition: color 0.2s, background-color 0.2s;
            background: transparent;
        }
        .faq-question:hover {
            background: var(--primary-light);
        }
        .faq-item.open .faq-question {
            color: var(--primary);
        }
        .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 700;
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 20px;
            background: var(--bg-page);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }
        .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.85;
        }

        /* CTA */
        .cta-section {
            background: var(--secondary);
            padding: 72px 0;
            color: #FFFFFF;
        }
        .cta-content {
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: 30px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 14px;
        }
        .cta-content p {
            font-size: 15px;
            color: #CBD5E1;
            line-height: 1.85;
            margin-bottom: 28px;
        }
        .btn-cta-light {
            background: #FFFFFF;
            color: var(--primary);
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 15px;
            transition: background-color 0.25s, box-shadow 0.25s, transform 0.15s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-cta-light:hover {
            background: #F1F5F9;
            box-shadow: 0 6px 20px rgba(255, 255, 255, 0.25);
            transform: translateY(-2px);
        }

        /* Footer */
        .site-footer {
            background: #1E293B;
            color: #CBD5E1;
            padding: 48px 0 0;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 36px;
        }
        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 14px;
        }
        .footer-brand .footer-logo .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 14px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .footer-brand p {
            font-size: 13px;
            color: #94A3B8;
            line-height: 1.8;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 14px;
        }
        .footer-col a {
            display: block;
            font-size: 13px;
            color: #94A3B8;
            padding: 4px 0;
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: #FFFFFF;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 18px 0;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: #94A3B8;
        }
        .footer-bottom a {
            color: #94A3B8;
            transition: color 0.2s;
        }
        .footer-bottom a:hover {
            color: #FFFFFF;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .resource-hero .hero-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .resource-hero h1 {
                font-size: 32px;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }
        @media (max-width: 768px) {
            .nav-links-desktop {
                display: none;
            }
            .desktop-cta {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .resource-hero {
                padding: 48px 0 56px;
            }
            .resource-hero h1 {
                font-size: 26px;
            }
            .section {
                padding: 48px 0;
            }
            .section-heading {
                font-size: 22px;
            }
            .resource-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 14px;
                padding: 18px;
            }
            .resource-meta {
                width: 100%;
                justify-content: space-between;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 14px;
                padding-right: 14px;
            }
            .resource-hero h1 {
                font-size: 24px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .hero-actions {
                flex-direction: column;
            }
            .btn-primary,
            .btn-secondary-plain {
                width: 100%;
                justify-content: center;
                text-align: center;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

/* roulang page: category7 */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-light: #EFF6FF;
            --secondary: #0F172A;
            --accent: #38BDF8;
            --bg-page: #F8FAFC;
            --bg-card: #FFFFFF;
            --text-primary: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --success: #10B981;
            --warning: #F59E0B;
            --font-sans: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --shadow-card: 0 4px 18px rgba(0, 0, 0, 0.06);
            --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
            --shadow-nav: 0 2px 12px rgba(0, 0, 0, 0.06);
            --shadow-btn: 0 4px 14px rgba(37, 99, 235, 0.3);
            --radius-card: 14px;
            --radius-btn: 8px;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-page);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, opacity 0.25s ease;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

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

        @media (max-width: 640px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* Top info bar */
        .top-info-bar {
            background: var(--secondary);
            color: #CBD5E1;
            font-size: 13px;
            padding: 8px 0;
            min-height: 36px;
            display: flex;
            align-items: center;
        }
        .top-info-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .top-info-bar a {
            color: #E2E8F0;
            font-weight: 500;
            transition: color 0.2s;
        }
        .top-info-bar a:hover {
            color: #FFFFFF;
        }
        .top-info-bar .top-cta {
            display: flex;
            align-items: center;
            gap: 6px;
            color: #93C5FD;
            font-weight: 600;
        }
        .top-info-bar .top-cta:hover {
            color: #DBEAFE;
        }

        /* Main navigation */
        .main-nav {
            background: var(--bg-card);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-nav);
            border-bottom: 1px solid var(--border);
        }
        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            flex-shrink: 0;
        }
        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .nav-logo .logo-icon span {
            line-height: 1;
        }
        .nav-links-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0 auto;
            flex-wrap: wrap;
        }
        .nav-links-desktop a {
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 6px;
            transition: color 0.2s, background-color 0.2s;
            position: relative;
            white-space: nowrap;
        }
        .nav-links-desktop a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-links-desktop a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-cta {
            background: var(--primary);
            color: #FFFFFF;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: background-color 0.25s, box-shadow 0.25s, transform 0.15s;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
        }
        .nav-cta:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
            transform: translateY(-1px);
        }
        .nav-cta:active {
            transform: scale(0.97);
        }

        /* Hamburger */
        .hamburger-btn {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 6px;
            border: 1px solid var(--border);
            background: var(--bg-card);
            transition: background-color 0.2s;
        }
        .hamburger-btn:hover {
            background: var(--primary-light);
        }
        .hamburger-btn span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .hamburger-btn.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger-btn.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger-btn.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Mobile menu */
        .mobile-menu {
            display: none;
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            padding: 16px 24px;
            position: sticky;
            top: 68px;
            z-index: 99;
            box-shadow: var(--shadow-nav);
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-menu nav a {
            padding: 12px 16px;
            font-size: 17px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            transition: background-color 0.2s, color 0.2s;
        }
        .mobile-menu nav a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .mobile-menu nav a.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-light);
        }
        .mobile-menu .mobile-cta {
            display: block;
            margin-top: 12px;
            text-align: center;
            background: var(--primary);
            color: #FFFFFF;
            padding: 14px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
        }

        @media (max-width: 1024px) {
            .hamburger-btn {
                display: flex;
            }
            .nav-links-desktop {
                display: none;
            }
            .desktop-cta {
                display: none;
            }
        }
        @media (min-width: 1025px) {
            .mobile-menu {
                display: none !important;
            }
        }

        /* Breadcrumb */
        .breadcrumb {
            padding: 16px 0 0;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            margin: 0 8px;
            color: var(--text-muted);
        }

        /* Page Hero */
        .faq-hero {
            padding: 32px 0 48px;
        }
        .faq-hero .container {
            display: flex;
            align-items: center;
            gap: 40px;
        }
        .faq-hero-left {
            flex: 1;
            min-width: 0;
        }
        .faq-hero-left h1 {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.35;
            margin-bottom: 16px;
        }
        .faq-hero-left h1 .highlight {
            color: var(--primary);
        }
        .faq-hero-left p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
            max-width: 640px;
        }
        .faq-hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .faq-hero-badges .badge {
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            background: var(--primary-light);
            color: var(--primary);
        }
        .faq-hero-right {
            flex-shrink: 0;
            width: 280px;
            height: 280px;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .faq-hero-right img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        @media (max-width: 768px) {
            .faq-hero .container {
                flex-direction: column;
                align-items: flex-start;
                gap: 24px;
            }
            .faq-hero-right {
                width: 100%;
                height: 200px;
            }
            .faq-hero-left h1 {
                font-size: 28px;
            }
        }

        /* Category tabs */
        .faq-cats {
            padding: 0 0 24px;
        }
        .faq-cats .container {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .faq-cat-btn {
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            border: 1px solid var(--border);
            background: var(--bg-card);
            color: var(--text-secondary);
            transition: all 0.25s;
        }
        .faq-cat-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }
        .faq-cat-btn.active {
            background: var(--primary);
            color: #FFFFFF;
            border-color: var(--primary);
            box-shadow: 0 2px 10px rgba(37, 99, 235, 0.25);
        }

        /* FAQ content */
        .faq-main {
            padding: 0 0 64px;
            flex: 1;
        }
        .faq-group {
            margin-bottom: 36px;
        }
        .faq-group-title {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }
        .faq-group-title .group-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .faq-group-title h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0;
        }
        .faq-accordion {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: box-shadow 0.3s;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-card-hover);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            cursor: pointer;
            transition: background-color 0.25s;
            width: 100%;
            text-align: left;
            background: none;
            border: none;
        }
        .faq-question:hover {
            background: var(--primary-light);
        }
        .faq-question span {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.6;
        }
        .faq-question .faq-toggle-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
            transition: transform 0.3s ease, background-color 0.3s;
        }
        .faq-item.open .faq-question .faq-toggle-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #FFFFFF;
        }
        .faq-item.open .faq-question span {
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
        }
        .faq-item.open .faq-answer {
            max-height: 600px;
            padding: 0 24px 20px;
        }
        .faq-answer p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
            margin: 0;
            background: var(--bg-page);
            border-radius: 8px;
            padding: 16px 20px;
        }

        /* Sidebar support card */
        .faq-sidebar {
            padding: 0 0 64px;
        }
        .faq-sidebar .container {
            display: flex;
            gap: 32px;
            align-items: flex-start;
        }
        .faq-sidebar-main {
            flex: 1;
            min-width: 0;
        }
        .faq-sidebar-aside {
            width: 300px;
            flex-shrink: 0;
            position: sticky;
            top: 100px;
        }
        @media (max-width: 1024px) {
            .faq-sidebar .container {
                flex-direction: column;
            }
            .faq-sidebar-aside {
                width: 100%;
                position: static;
            }
        }

        .support-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px 24px;
            text-align: center;
        }
        .support-card .support-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            font-weight: 800;
            margin: 0 auto 16px;
        }
        .support-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
        }
        .support-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .support-card .support-btn {
            display: inline-block;
            background: var(--primary);
            color: #FFFFFF;
            padding: 10px 24px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            transition: background-color 0.25s, box-shadow 0.25s;
        }
        .support-card .support-btn:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
        }

        /* CTA section */
        .faq-cta-section {
            background: var(--primary-light);
            padding: 56px 0;
            margin-bottom: 0;
        }
        .faq-cta-section .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }
        .faq-cta-section h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .faq-cta-section p {
            font-size: 15px;
            color: var(--text-secondary);
            margin: 0;
            max-width: 560px;
            line-height: 1.7;
        }
        .faq-cta-section .cta-btn {
            background: var(--primary);
            color: #FFFFFF;
            padding: 12px 32px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            white-space: nowrap;
            transition: background-color 0.25s, box-shadow 0.25s, transform 0.15s;
            box-shadow: 0 2px 12px rgba(37, 99, 235, 0.25);
        }
        .faq-cta-section .cta-btn:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-btn);
            transform: translateY(-2px);
        }
        @media (max-width: 640px) {
            .faq-cta-section .container {
                flex-direction: column;
                align-items: flex-start;
            }
            .faq-cta-section h2 {
                font-size: 22px;
            }
        }

        /* Footer */
        .site-footer {
            background: var(--secondary);
            color: #CBD5E1;
            padding: 56px 0 20px;
            margin-top: 0;
        }
        .site-footer .container {
            display: flex;
            flex-direction: column;
            gap: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 32px;
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            color: #94A3B8;
            line-height: 1.7;
            margin: 0;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            font-size: 13px;
            color: #94A3B8;
            padding: 5px 0;
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: #FFFFFF;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 8px 24px;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: #94A3B8;
        }
        .footer-bottom a {
            color: #94A3B8;
            transition: color 0.2s;
        }
        .footer-bottom a:hover {
            color: #FFFFFF;
        }
        .footer-bottom .footer-legal {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 20px;
            align-items: center;
        }