/* roulang page: index */
:root {
            --primary: #e8b54d;
            --primary-hover: #f2c86b;
            --primary-dark: #c99a2e;
            --secondary: #4a6cf7;
            --secondary-light: #7b94fa;
            --dark-bg: #0b0e1a;
            --dark-bg-2: #12162a;
            --dark-bg-3: #1a1f38;
            --body-bg: #f4f5fb;
            --card-bg: #ffffff;
            --text-main: #1c1f2b;
            --text-muted: #6f7686;
            --text-light: #f8f9fc;
            --border: #e3e6ef;
            --border-dark: rgba(255,255,255,.12);
            --shadow-sm: 0 2px 10px rgba(0,0,0,.05);
            --shadow-md: 0 10px 30px rgba(0,0,0,.09);
            --shadow-lg: 0 20px 60px rgba(0,0,0,.14);
            --shadow-gold: 0 8px 30px rgba(232,181,77,.35);
            --radius-xs: 8px;
            --radius-sm: 12px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-full: 999px;
            --font-main: 'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
            --transition: all .3s ease;
            --section-gap: 90px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            background: var(--body-bg);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        input {
            font-family: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: var(--section-gap) 0;
        }
        .section-alt {
            background: var(--card-bg);
        }
        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 52px;
        }
        .section-tag {
            display: inline-block;
            padding: 6px 18px;
            border-radius: var(--radius-full);
            background: rgba(232,181,77,.12);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 13px;
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-bottom: 14px;
        }
        .section-title {
            font-size: clamp(28px, 3.6vw, 42px);
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-main);
            letter-spacing: -1px;
            margin-bottom: 12px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.8;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 15px;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: #1a1205;
            box-shadow: var(--shadow-gold);
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 12px 40px rgba(232,181,77,.4);
        }
        .btn-outline-light {
            border-color: rgba(255,255,255,.7);
            color: #fff;
        }
        .btn-outline-light:hover {
            background: rgba(255,255,255,.12);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 8px 24px rgba(74,108,247,.3);
        }
        .btn-secondary:hover {
            background: var(--secondary-light);
            transform: translateY(-2px);
        }
        .btn-block {
            width: 100%;
        }
        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            font-size: 12px;
            font-weight: 700;
            background: rgba(74,108,247,.1);
            color: var(--secondary);
        }
        .site-header {
            position: fixed;
            top: 16px;
            left: 50%;
            transform: translateX(-50%);
            width: min(1180px, calc(100% - 32px));
            z-index: 1000;
            background: rgba(255,255,255,.82);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-radius: var(--radius-full);
            box-shadow: var(--shadow-sm);
            padding: 10px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            transition: box-shadow .3s ease, background .3s ease;
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
            background: rgba(255,255,255,.95);
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.5px;
            white-space: nowrap;
        }
        .nav-brand i {
            color: var(--primary);
            font-size: 22px;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-menu a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-full);
            font-size: 14px;
            font-weight: 600;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .nav-menu a:hover {
            color: var(--primary-dark);
            background: rgba(232,181,77,.08);
        }
        .nav-menu a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 16px rgba(232,181,77,.35);
        }
        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: rgba(232,181,77,.12);
            color: var(--primary-dark);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(232,181,77,.2);
        }
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            color: #fff;
            padding: 160px 24px 120px;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11,14,26,.55) 0%, rgba(11,14,26,.65) 50%, rgba(11,14,26,.9) 100%);
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 160px;
            background: linear-gradient(180deg, transparent, rgba(244,245,251,1));
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 22px;
            border-radius: var(--radius-full);
            border: 1px solid rgba(255,255,255,.25);
            background: rgba(255,255,255,.1);
            backdrop-filter: blur(8px);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 1px;
            color: rgba(255,255,255,.95);
            margin-bottom: 28px;
        }
        .hero-badge i {
            color: var(--primary);
        }
        .hero-title {
            font-size: clamp(36px, 6vw, 68px);
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -2px;
            margin-bottom: 20px;
            text-shadow: 0 4px 30px rgba(0,0,0,.3);
        }
        .hero-title span {
            color: var(--primary);
        }
        .hero-subtitle {
            font-size: clamp(16px, 2vw, 20px);
            line-height: 1.8;
            color: rgba(255,255,255,.85);
            max-width: 620px;
            margin: 0 auto 38px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero-note {
            margin-top: 36px;
            font-size: 13px;
            color: rgba(255,255,255,.55);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
        }
        .hero-note i {
            color: var(--primary);
        }
        .intro-section {
            padding: 80px 0;
            background: var(--card-bg);
            border-bottom: 1px solid var(--border);
        }
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .intro-visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .intro-visual img {
            width: 100%;
            height: 420px;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .intro-visual:hover img {
            transform: scale(1.03);
        }
        .intro-visual::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(11,14,26,.4));
        }
        .intro-float {
            position: absolute;
            left: 20px;
            bottom: 20px;
            z-index: 2;
            background: rgba(255,255,255,.92);
            backdrop-filter: blur(10px);
            padding: 14px 20px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            font-size: 14px;
            color: var(--text-main);
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .intro-float i {
            color: var(--primary);
            font-size: 18px;
        }
        .intro-content {
            padding: 20px 0;
        }
        .intro-content .section-tag {
            margin-bottom: 16px;
        }
        .intro-content h2 {
            font-size: clamp(26px, 3vw, 38px);
            font-weight: 800;
            line-height: 1.35;
            margin-bottom: 16px;
            color: var(--text-main);
        }
        .intro-content p {
            color: var(--text-muted);
            line-height: 1.85;
            margin-bottom: 20px;
            font-size: 15px;
        }
        .intro-list {
            margin: 24px 0;
        }
        .intro-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 14px;
            font-size: 15px;
        }
        .intro-list li i {
            color: var(--primary);
            margin-top: 4px;
        }
        .category-section {
            background: var(--body-bg);
        }
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .category-card {
            position: relative;
            display: block;
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .category-card-img {
            position: relative;
            height: 200px;
            overflow: hidden;
        }
        .category-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .category-card:hover .category-card-img img {
            transform: scale(1.07);
        }
        .category-card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11,14,26,.05) 0%, rgba(11,14,26,.55) 100%);
        }
        .category-card-icon {
            position: absolute;
            left: 20px;
            bottom: -20px;
            z-index: 2;
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--primary);
            color: #1a1205;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: var(--shadow-gold);
        }
        .category-card-body {
            padding: 36px 22px 24px;
        }
        .category-card-body h3 {
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .category-card-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 700;
            font-size: 14px;
            color: var(--primary-dark);
        }
        .category-card:hover .category-link {
            gap: 10px;
        }
        .news-section {
            background: var(--card-bg);
        }
        .news-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .post-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 22px 24px;
            background: var(--card-bg);
            transition: var(--transition);
        }
        .post-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .post-item a {
            display: block;
            text-decoration: none;
        }
        .post-cat {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            background: rgba(74,108,247,.1);
            color: var(--secondary);
            font-size: 12px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .post-title {
            font-size: 17px;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.5;
            margin-bottom: 8px;
            transition: var(--transition);
        }
        .post-item:hover .post-title {
            color: var(--primary-dark);
        }
        .post-excerpt {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px dashed var(--border);
            padding-top: 12px;
        }
        .post-link {
            font-weight: 700;
            color: var(--primary-dark);
        }
        .empty-tip {
            grid-column: 1 / -1;
            text-align: center;
            padding: 40px;
            background: var(--body-bg);
            border-radius: var(--radius-md);
            color: var(--text-muted);
            font-size: 15px;
        }
        .stats-section {
            position: relative;
            background: url('/assets/images/backpic/back-2.png') center 20% / cover no-repeat;
            color: #fff;
            padding: 100px 0;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(11,14,26,.92), rgba(11,14,26,.75));
        }
        .stats-grid {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .stat-item {
            padding: 20px;
        }
        .stat-icon {
            font-size: 32px;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .stat-num {
            font-size: 44px;
            font-weight: 900;
            line-height: 1.2;
            letter-spacing: -2px;
        }
        .stat-label {
            font-size: 14px;
            color: rgba(255,255,255,.62);
            margin-top: 6px;
        }
        .steps-section {
            background: var(--body-bg);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 8%;
            right: 8%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), rgba(232,181,77,.1));
        }
        .step-item {
            text-align: center;
            position: relative;
            padding: 0 12px;
        }
        .step-num {
            width: 80px;
            height: 80px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: var(--card-bg);
            box-shadow: var(--shadow-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 900;
            color: var(--primary-dark);
            border: 2px solid var(--primary);
            position: relative;
            z-index: 2;
        }
        .step-item h3 {
            font-size: 17px;
            font-weight: 800;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .features-section {
            background: var(--dark-bg);
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .features-section::before {
            content: '';
            position: absolute;
            top: -200px;
            right: -100px;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: rgba(74,108,247,.12);
            filter: blur(60px);
        }
        .features-section .section-title,
        .features-section .section-subtitle {
            color: #fff;
        }
        .features-section .section-subtitle {
            color: rgba(255,255,255,.65);
        }
        .features-section .section-tag {
            background: rgba(232,181,77,.15);
            color: var(--primary);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            position: relative;
            z-index: 2;
        }
        .feature-card {
            background: rgba(255,255,255,.05);
            border: 1px solid rgba(255,255,255,.1);
            border-radius: var(--radius-lg);
            padding: 30px 28px;
            transition: var(--transition);
        }
        .feature-card:hover {
            background: rgba(255,255,255,.1);
            border-color: rgba(232,181,77,.4);
            transform: translateY(-4px);
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: rgba(232,181,77,.15);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 18px;
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 800;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            color: rgba(255,255,255,.65);
            line-height: 1.7;
        }
        .faq-section {
            background: var(--body-bg);
        }
        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 22px 26px;
            margin-bottom: 14px;
            cursor: pointer;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .faq-item.open {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 700;
            font-size: 16px;
            color: var(--text-main);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary);
            color: #1a1205;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            transition: transform .3s ease;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            display: none;
            margin-top: 16px;
            padding-top: 16px;
            border-top: 1px dashed var(--border);
            color: var(--text-muted);
            line-height: 1.85;
            font-size: 14px;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .cta-section {
            background: var(--dark-bg);
            background-image: linear-gradient(120deg, rgba(11,14,26,.94), rgba(11,14,26,.85)), url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            color: #fff;
            text-align: center;
            padding: 100px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            top: -100px;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 300px;
            background: rgba(232,181,77,.15);
            filter: blur(80px);
            border-radius: 50%;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 900;
            margin-bottom: 16px;
        }
        .cta-content p {
            font-size: 16px;
            color: rgba(255,255,255,.7);
            margin-bottom: 34px;
            line-height: 1.8;
        }
        .site-footer {
            background: #080a14;
            color: rgba(255,255,255,.6);
            padding: 50px 0 30px;
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-brand i {
            color: var(--primary);
        }
        .footer-desc {
            line-height: 1.8;
            color: rgba(255,255,255,.5);
            max-width: 360px;
            font-size: 14px;
        }
        .footer-heading {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: rgba(255,255,255,.55);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-links a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,.08);
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: rgba(255,255,255,.4);
        }
        .footer-bottom a {
            color: rgba(255,255,255,.6);
        }
        @keyframes floatIn {
            from {
                opacity: 0;
                transform: translateY(40px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .hero-content {
            animation: floatIn .8s ease-out both;
        }
        .intro-visual {
            animation: floatIn .8s ease-out both;
        }
        @media (max-width: 1024px) {
            :root {
                --section-gap: 70px;
            }
            .category-grid {
                gap: 20px;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px 20px;
            }
            .steps-grid::before {
                display: none;
            }
            .stat-num {
                font-size: 36px;
            }
        }
        @media (max-width: 768px) {
            body {
                font-size: 15px;
            }
            .site-header {
                width: calc(100% - 20px);
                top: 10px;
                padding: 8px 16px;
                border-radius: var(--radius-full);
            }
            .nav-brand {
                font-size: 17px;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-menu {
                position: fixed;
                top: 72px;
                left: 10px;
                right: 10px;
                background: #fff;
                border-radius: var(--radius-lg);
                box-shadow: var(--shadow-lg);
                padding: 14px;
                flex-direction: column;
                align-items: stretch;
                gap: 2px;
                display: none;
                z-index: 999;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                justify-content: flex-start;
            }
            .nav-menu a:hover {
                background: rgba(232,181,77,.1);
            }
            .nav-menu a.active {
                background: var(--primary);
                color: #fff;
            }
            .hero {
                min-height: 92vh;
                padding: 120px 20px 80px;
            }
            .hero-title {
                font-size: 36px;
            }
            .hero-subtitle {
                font-size: 15px;
                margin-bottom: 28px;
            }
            .hero-actions {
                flex-direction: column;
                gap: 12px;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .intro-visual img {
                height: 280px;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .stat-num {
                font-size: 32px;
            }
            .stat-icon {
                font-size: 24px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .step-item {
                display: flex;
                align-items: center;
                gap: 20px;
                text-align: left;
            }
            .step-num {
                width: 60px;
                height: 60px;
                font-size: 20px;
                margin: 0;
                flex-shrink: 0;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .cta-section {
                padding: 70px 24px;
            }
            .section-title {
                font-size: 26px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-num {
                font-size: 26px;
            }
            .stat-label {
                font-size: 12px;
            }
            .post-item {
                padding: 16px;
            }
            .post-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .faq-question {
                font-size: 15px;
                line-height: 1.5;
            }
            .footer-bottom {
                font-size: 12px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1e5eff;
            --primary-dark: #103a9f;
            --primary-light: #eaf0ff;
            --accent: #ffb02e;
            --success: #12b76a;
            --dark: #0b1b3a;
            --dark-2: #10254d;
            --bg: #f5f8ff;
            --card: #ffffff;
            --text: #17233f;
            --muted: #64748b;
            --border: #e2e9f6;
            --radius: 18px;
            --radius-lg: 28px;
            --radius-full: 999px;
            --shadow: 0 12px 36px rgba(23, 43, 99, 0.08);
            --shadow-lg: 0 24px 60px rgba(23, 43, 99, 0.14);
            --transition: all 0.28s cubic-bezier(0.22, 1, 0.36, 1);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            width: min(1200px, 92%);
            margin: 0 auto;
        }
        .section {
            padding: 96px 0;
        }
        .section-head {
            max-width: 720px;
            margin-bottom: 52px;
        }
        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1px;
            color: var(--primary);
            background: var(--primary-light);
            border: 1px solid rgba(30, 94, 255, 0.12);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            margin-bottom: 18px;
            text-transform: uppercase;
        }
        .section-title {
            font-size: clamp(28px, 4vw, 40px);
            line-height: 1.25;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--dark);
            margin-bottom: 14px;
        }
        .section-sub {
            font-size: 16px;
            color: var(--muted);
            line-height: 1.8;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 14px 30px;
            border-radius: var(--radius-full);
            font-size: 15px;
            font-weight: 700;
            border: 2px solid transparent;
            cursor: pointer;
            transition: var(--transition);
            line-height: 1.2;
        }
        .btn i {
            font-size: 14px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 10px 24px rgba(30, 94, 255, 0.3);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 16px 34px rgba(30, 94, 255, 0.35);
        }
        .btn-outline {
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(6px);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.18);
            border-color: #fff;
            transform: translateY(-3px);
        }
        .btn-light {
            background: #fff;
            color: var(--primary-dark);
            box-shadow: 0 10px 24px rgba(0, 0, 0, 0.14);
        }
        .btn-light:hover {
            transform: translateY(-3px);
            box-shadow: 0 18px 38px rgba(0, 0, 0, 0.2);
        }
        /* Header */
        .site-header {
            position: sticky;
            top: 16px;
            z-index: 120;
            width: min(1200px, calc(100% - 32px));
            margin: 16px auto 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 12px 24px;
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid rgba(255, 255, 255, 0.6);
            border-radius: var(--radius-full);
            box-shadow: 0 8px 32px rgba(2, 32, 71, 0.1);
        }
        .nav-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 19px;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .nav-brand i {
            color: var(--primary);
            font-size: 20px;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-menu a {
            padding: 9px 20px;
            border-radius: var(--radius-full);
            font-size: 14px;
            font-weight: 600;
            color: var(--muted);
            transition: var(--transition);
        }
        .nav-menu a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-menu a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 6px 18px rgba(30, 94, 255, 0.3);
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border: none;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 18px;
            cursor: pointer;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--primary);
            color: #fff;
        }
        /* Hero */
        .site-hero {
            position: relative;
            min-height: 780px;
            display: flex;
            align-items: center;
            padding: 180px 0 100px;
            background: linear-gradient(75deg, #071c42 0%, #0e2a63 42%, #123a7a 100%);
            color: #fff;
            overflow: hidden;
            margin-top: -86px;
            border-radius: 0 0 42px 42px;
        }
        .site-hero .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.55;
            transform: scale(1.03);
        }
        .site-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(255deg, rgba(5, 16, 44, 0.82) 0%, rgba(7, 28, 66, 0.55) 55%, rgba(16, 42, 96, 0.35) 100%);
            z-index: 1;
        }
        .site-hero::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -1px;
            height: 140px;
            background: linear-gradient(to bottom, transparent, var(--bg));
            z-index: 2;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            width: min(1200px, 92%);
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 60px;
            align-items: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.22);
            backdrop-filter: blur(8px);
            padding: 8px 18px;
            border-radius: var(--radius-full);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 24px;
            color: #e8f0ff;
        }
        .hero-badge i {
            color: var(--accent);
        }
        .hero-title {
            font-size: clamp(36px, 5.2vw, 58px);
            line-height: 1.14;
            font-weight: 900;
            letter-spacing: -0.03em;
            margin-bottom: 22px;
        }
        .hero-title span {
            background: linear-gradient(90deg, #ffd27a, #ffb02e);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .hero-desc {
            font-size: 17px;
            line-height: 1.9;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin-bottom: 36px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 46px;
        }
        .media-btn {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.28);
            padding: 8px 22px 8px 8px;
            border-radius: var(--radius-full);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
        }
        .media-btn:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }
        .media-btn .play {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: #fff;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
            font-size: 14px;
        }
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            padding-top: 36px;
            border-top: 1px solid rgba(255, 255, 255, 0.22);
            max-width: 560px;
        }
        .stat-item .stat-num {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
        }
        .stat-item .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.68);
            margin-top: 4px;
        }
        .hero-visual {
            position: relative;
            z-index: 3;
            border-radius: var(--radius-lg);
            box-shadow: 0 40px 80px rgba(0, 0, 0, 0.35);
            overflow: hidden;
            transform: rotate(1.2deg);
        }
        .hero-visual img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }
        .hero-visual .cover-tag {
            position: absolute;
            left: 18px;
            bottom: 18px;
            background: rgba(255, 255, 255, 0.92);
            backdro-filter: blur(4px);
            padding: 8px 16px;
            border-radius: var(--radius-full);
            font-size: 13px;
            font-weight: 700;
            color: var(--dark);
        }
        /* Category Chips */
        .cat-chips-wrap {
            margin-top: -36px;
            position: relative;
            z-index: 5;
        }
        .cat-chips {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            background: var(--card);
            border-radius: 22px;
            box-shadow: var(--shadow-lg);
            padding: 22px 28px;
            border: 1px solid var(--border);
        }
        .cat-chip {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: var(--radius-full);
            font-size: 14px;
            font-weight: 600;
            background: var(--bg);
            border: 1px solid var(--border);
            color: var(--muted);
            transition: var(--transition);
        }
        .cat-chip:hover {
            border-color: rgba(30, 94, 255, 0.4);
            color: var(--primary);
            background: var(--primary-light);
            transform: translateY(-2px);
        }
        .cat-chip.on {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 8px 20px rgba(30, 94, 255, 0.24);
        }
        .cat-chip i {
            font-size: 13px;
        }
        /* Cards */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .icon-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: var(--transition);
        }
        .icon-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(30, 94, 255, 0.18);
        }
        .card-img {
            position: relative;
            height: 190px;
            overflow: hidden;
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .icon-card:hover .card-img img {
            transform: scale(1.06);
        }
        .card-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(8, 20, 48, 0.45));
        }
        .card-top-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.92);
            color: var(--dark);
            padding: 5px 14px;
            border-radius: var(--radius-full);
            font-size: 12px;
            font-weight: 700;
        }
        .card-body {
            padding: 26px 26px 30px;
        }
        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 16px;
        }
        .card-title {
            font-size: 19px;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 8px;
        }
        .card-text {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.8;
            margin-bottom: 18px;
        }
        .tag-row {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: var(--radius-full);
            background: var(--bg);
            border: 1px solid var(--border);
            font-size: 12px;
            font-weight: 600;
            color: var(--muted);
        }
        .tag.dark {
            background: rgba(30, 94, 255, 0.08);
            color: var(--primary);
            border-color: rgba(30, 94, 255, 0.14);
        }
        /* Steps */
        .steps-section {
            background: linear-gradient(180deg, var(--bg) 0%, #eaf0ff 100%);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .step-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 34px 28px;
            position: relative;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .step-num {
            font-size: 42px;
            font-weight: 900;
            line-height: 1;
            color: transparent;
            -webkit-text-stroke: 2px var(--primary);
            margin-bottom: 18px;
            opacity: 0.85;
        }
        .step-title {
            font-size: 17px;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 10px;
        }
        .step-text {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.75;
        }
        .step-card::after {
            content: "\f054";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            position: absolute;
            top: 38px;
            right: -16px;
            color: var(--primary);
            font-size: 14px;
            background: #eaf0ff;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 3;
        }
        .step-card:last-child::after {
            display: none;
        }
        /* Horizontal Scroll */
        .horiz-scroll {
            position: relative;
            overflow: hidden;
        }
        .scroll-track {
            display: flex;
            gap: 24px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            padding: 10px 4px 36px;
            scrollbar-width: thin;
            scrollbar-color: var(--primary) var(--border);
        }
        .scroll-track::-webkit-scrollbar {
            height: 8px;
        }
        .scroll-track::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 8px;
        }
        .scroll-track::-webkit-scrollbar-track {
            background: var(--border);
            border-radius: 8px;
        }
        .scroll-card {
            flex: 0 0 300px;
            scroll-snap-align: start;
            background: var(--card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .scroll-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .scroll-card .pic {
            height: 180px;
            overflow: hidden;
            position: relative;
        }
        .scroll-card .pic img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .scroll-card .pic::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(6, 16, 40, 0.4));
        }
        .scroll-card .pic .badge {
            position: absolute;
            left: 14px;
            bottom: 14px;
            z-index: 2;
            background: var(--accent);
            color: #1a1a1a;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            font-size: 12px;
            font-weight: 800;
        }
        .scroll-card .body {
            padding: 24px 22px 26px;
        }
        .scroll-card .body .name {
            font-size: 17px;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 8px;
        }
        .scroll-card .body .desc {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .link-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
            transition: var(--transition);
        }
        .link-more:hover {
            gap: 12px;
        }
        /* FAQ */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: grid;
            gap: 16px;
        }
        .faq-item {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(30, 94, 255, 0.24);
        }
        .faq-item summary {
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 22px 26px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 700;
            color: var(--dark);
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: "\f107";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 16px;
            color: var(--primary);
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: var(--transition);
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
            background: var(--primary);
            color: #fff;
        }
        .faq-item .faq-answer {
            padding: 0 26px 26px;
            color: var(--muted);
            font-size: 14px;
            line-height: 1.85;
        }
        /* Feedback */
        .feedback-section {
            background: var(--dark);
            background-image: linear-gradient(rgba(16, 37, 77, 0.92), rgba(16, 37, 77, 0.92)), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            color: #fff;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .quote-card {
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.14);
            backdrop-filter: blur(8px);
            border-radius: var(--radius-lg);
            padding: 32px 30px;
            transition: var(--transition);
        }
        .quote-card:hover {
            background: rgba(255, 255, 255, 0.11);
            transform: translateY(-6px);
        }
        .quote-stars {
            color: var(--accent);
            font-size: 14px;
            margin-bottom: 16px;
            letter-spacing: 2px;
        }
        .quote-text {
            font-size: 15px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.88);
            margin-bottom: 20px;
        }
        .quote-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .quote-avatar {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), #ff8a2b);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 800;
            color: #17233f;
        }
        .quote-user .name {
            font-size: 14px;
            font-weight: 700;
        }
        .quote-user .role {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.6);
        }
        /* CTA */
        .cta-section {
            padding: 100px 0;
            position: relative;
            background: linear-gradient(120deg, #0b1b3a, #14337a);
            border-radius: 42px;
            width: min(1200px, 92%);
            margin: 0 auto 100px;
            overflow: hidden;
            text-align: center;
            color: #fff;
        }
        .cta-section .cta-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.3;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            padding: 60px 40px;
        }
        .cta-title {
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 900;
            margin-bottom: 16px;
        }
        .cta-text {
            max-width: 560px;
            margin: 0 auto 34px;
            color: rgba(255, 255, 255, 0.75);
            font-size: 16px;
            line-height: 1.85;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        /* Footer */
        .site-footer {
            background: #0b1b3a;
            color: rgba(255, 255, 255, 0.72);
            padding: 68px 0 32px;
            border-top: 4px solid var(--primary);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 40px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand i {
            color: var(--accent);
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.85;
            color: rgba(255, 255, 255, 0.55);
            max-width: 360px;
        }
        .footer-heading {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
            transform: translateX(4px);
        }
        .footer-links a i {
            font-size: 11px;
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 28px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.42);
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .section {
                padding: 76px 0;
            }
            .hero-content {
                grid-template-columns: 1fr;
                gap: 48px;
            }
            .hero-visual {
                max-width: 560px;
            }
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .step-card::after {
                display: none;
            }
            .feedback-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .site-header {
                top: 12px;
                width: calc(100% - 24px);
                margin-top: 12px;
                padding: 10px 16px;
                border-radius: 24px;
                flex-wrap: wrap;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 14px 8px 8px;
                border-top: 1px solid var(--border);
                margin-top: 8px;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                text-align: center;
                padding: 12px 16px;
            }
            .nav-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .site-hero {
                min-height: 680px;
                padding: 150px 0 80px;
                border-radius: 0 0 28px 28px;
            }
            .hero-stats {
                grid-template-columns: repeat(3, 1fr);
                gap: 12px;
            }
            .stat-item .stat-num {
                font-size: 22px;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            .cta-section {
                border-radius: 28px;
                margin-bottom: 60px;
            }
            .cta-inner {
                padding: 40px 24px;
            }
        }
        @media (max-width: 520px) {
            .section {
                padding: 60px 0;
            }
            .site-hero {
                min-height: 600px;
                padding: 130px 0 70px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn,
            .hero-actions .media-btn {
                justify-content: center;
                width: 100%;
            }
            .hero-stats {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 8px;
            }
            .stat-item .stat-num {
                font-size: 20px;
            }
            .stat-item .stat-label {
                font-size: 12px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .cat-chips {
                padding: 18px;
                border-radius: 18px;
            }
            .cat-chip {
                width: 100%;
                justify-content: center;
            }
            .scroll-card {
                flex: 0 0 260px;
            }
            .faq-item summary {
                padding: 18px 16px;
                font-size: 14px;
            }
            .faq-item .faq-answer {
                padding: 0 16px 20px;
                font-size: 13px;
            }
            .quote-card {
                padding: 24px 20px;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
        }

/* roulang page: article */
:root {
            --primary: #0c1222;
            --primary-light: #1b2540;
            --accent: #d4a853;
            --accent-light: #e7c982;
            --bg-soft: #f7f6f3;
            --bg-white: #ffffff;
            --text-dark: #1a2332;
            --text-muted: #6f7684;
            --border: #e8e6e2;
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 10px rgba(12, 18, 34, 0.06);
            --shadow-md: 0 10px 30px rgba(12, 18, 34, 0.1);
            --shadow-lg: 0 24px 60px rgba(12, 18, 34, 0.2);
            --section-space: 90px;
            --container: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg-soft);
            color: var(--text-dark);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease, background .25s ease, border-color .25s ease, box-shadow .25s ease, transform .25s ease;
        }

        button,
        input {
            font: inherit;
        }

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

        .site-header {
            position: sticky;
            top: 16px;
            z-index: 1000;
            max-width: 1180px;
            margin: 16px auto 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            background: rgba(12, 18, 34, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 60px;
            padding: 10px 24px 10px 28px;
            box-shadow: 0 10px 40px rgba(12, 18, 34, 0.28);
            transition: box-shadow .3s ease, background .3s ease;
        }

        .site-header.scrolled {
            background: rgba(12, 18, 34, 0.96);
            box-shadow: 0 14px 42px rgba(12, 18, 34, 0.38);
        }

        .site-header .nav-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .site-header .nav-brand i {
            color: var(--accent);
            font-size: 22px;
            transform: rotate(-12deg);
        }

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

        .nav-menu a {
            position: relative;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 20px;
            border-radius: 40px;
            color: rgba(255, 255, 255, 0.78);
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.4px;
            transition: all .25s ease;
        }

        .nav-menu a:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-1px);
        }

        .nav-menu a.active {
            color: var(--primary);
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
            box-shadow: 0 4px 16px rgba(212, 168, 83, 0.4);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #ffffff;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            font-size: 18px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all .25s ease;
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        .page-hero {
            position: relative;
            padding: 180px 0 120px;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center 30%;
            isolation: isolate;
            margin-top: -76px;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            z-index: -1;
            background: linear-gradient(120deg, rgba(12, 18, 34, 0.94) 0%, rgba(12, 18, 34, 0.82) 45%, rgba(27, 37, 64, 0.68) 100%);
        }

        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            z-index: -1;
            background: radial-gradient(ellipse at 85% 20%, rgba(212, 168, 83, 0.22) 0%, transparent 65%);
        }

        .hero-inner {
            position: relative;
            max-width: 920px;
            margin: 0 auto;
            text-align: center;
        }

        .breadcrumb {
            display: inline-flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 8px 18px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: 40px;
            margin-bottom: 30px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
        }

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

        .breadcrumb i {
            font-size: 10px;
            color: rgba(255, 255, 255, 0.4);
        }

        .hero-title {
            font-size: clamp(34px, 5vw, 56px);
            font-weight: 900;
            line-height: 1.2;
            color: #ffffff;
            letter-spacing: 1px;
            margin-bottom: 20px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
        }

        .hero-desc {
            font-size: clamp(16px, 2vw, 20px);
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.82);
            max-width: 680px;
            margin: 0 auto;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border-radius: 40px;
            background: rgba(212, 168, 83, 0.18);
            border: 1px solid rgba(212, 168, 83, 0.4);
            color: var(--accent-light);
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 22px;
            letter-spacing: 1px;
        }

        .article-section {
            padding: 70px 0 90px;
            background: var(--bg-soft);
        }

        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 360px;
            gap: 48px;
        }

        .article-main {
            min-width: 0;
        }

        .article-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 48px 52px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow .3s ease;
        }

        .article-card:hover {
            box-shadow: var(--shadow-md);
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px 28px;
            padding-bottom: 24px;
            margin-bottom: 32px;
            border-bottom: 1px solid var(--border);
            color: var(--text-muted);
            font-size: 14px;
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .article-meta i {
            color: var(--accent);
        }

        .article-content {
            font-size: 16.5px;
            line-height: 1.95;
            color: #2d3442;
        }

        .article-content h2 {
            font-size: 26px;
            font-weight: 800;
            color: var(--primary);
            margin: 40px 0 18px;
            padding-left: 16px;
            border-left: 4px solid var(--accent);
            line-height: 1.4;
        }

        .article-content h3 {
            font-size: 21px;
            font-weight: 750;
            color: var(--primary);
            margin: 30px 0 14px;
        }

        .article-content p {
            margin-bottom: 18px;
        }

        .article-content ul,
        .article-content ol {
            margin: 16px 0 24px;
            padding-left: 24px;
        }

        .article-content li {
            margin-bottom: 10px;
        }

        .article-content ul li {
            position: relative;
            list-style: none;
        }

        .article-content ul li::before {
            content: '\f0da';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: -20px;
            top: 2px;
            color: var(--accent);
            font-size: 13px;
        }

        .article-content blockquote {
            background: #faf8f4;
            border-left: 4px solid var(--accent);
            border-radius: 0 14px 14px 0;
            padding: 20px 26px;
            margin: 26px 0;
            color: #4c5565;
            font-style: normal;
            position: relative;
        }

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

        .article-content a {
            color: #b68a2e;
            font-weight: 600;
            border-bottom: 1px solid rgba(182, 138, 46, 0.4);
        }

        .article-content a:hover {
            border-bottom-color: #b68a2e;
        }

        .article-footer-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 40px;
            padding-top: 30px;
            border-top: 1px solid var(--border);
        }

        .not-found-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 64px 40px;
            text-align: center;
            box-shadow: var(--shadow-sm);
        }

        .not-found-card i {
            font-size: 56px;
            color: var(--accent);
            margin-bottom: 20px;
        }

        .not-found-card h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .not-found-card p {
            color: var(--text-muted);
            margin-bottom: 28px;
        }

        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }

        .sidebar-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
        }

        .sidebar-title {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 20px;
            padding-bottom: 14px;
            border-bottom: 1px solid var(--border);
        }

        .sidebar-title i {
            color: var(--accent);
            font-size: 16px;
        }

        .sidebar-links {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .sidebar-links a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 14px;
            border-radius: 12px;
            color: var(--text-dark);
            font-size: 15px;
            font-weight: 500;
            transition: all .25s ease;
        }

        .sidebar-links a i {
            font-size: 13px;
            color: var(--accent);
            transition: transform .25s ease;
        }

        .sidebar-links a:hover {
            background: #faf7f0;
            color: var(--primary);
            transform: translateX(4px);
        }

        .sidebar-links a:hover i {
            transform: translateX(2px);
        }

        .sidebar-contact {
            background: linear-gradient(150deg, var(--primary) 0%, var(--primary-light) 100%);
            border: none;
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }

        .sidebar-contact::after {
            content: '';
            position: absolute;
            right: -40px;
            top: -40px;
            width: 130px;
            height: 130px;
            border-radius: 50%;
            background: rgba(212, 168, 83, 0.18);
        }

        .sidebar-contact .sidebar-title {
            color: #ffffff;
            border-bottom-color: rgba(255, 255, 255, 0.15);
        }

        .sidebar-contact .sidebar-title i {
            color: var(--accent-light);
        }

        .sidebar-contact p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 14px;
            margin-bottom: 20px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 12px 28px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            border: none;
            transition: all .3s ease;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
            color: var(--primary);
            box-shadow: 0 6px 20px rgba(212, 168, 83, 0.4);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(212, 168, 83, 0.5);
        }

        .btn-outline-light {
            background: transparent;
            color: #ffffff;
            border: 1.5px solid rgba(255, 255, 255, 0.6);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            transform: translateY(-2px);
        }

        .sidebar-contact .btn {
            width: 100%;
        }

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

        .section-head {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 7px 18px;
            border-radius: 40px;
            background: rgba(212, 168, 83, 0.12);
            border: 1px solid rgba(212, 168, 83, 0.3);
            color: #b68a2e;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 2px;
            margin-bottom: 16px;
        }

        .section-head h2 {
            font-size: clamp(28px, 3.6vw, 42px);
            font-weight: 900;
            color: var(--primary);
            line-height: 1.25;
            margin-bottom: 14px;
        }

        .section-head p {
            color: var(--text-muted);
            font-size: 16px;
            max-width: 560px;
            margin: 0 auto;
        }

        .recommend-section {
            padding: 80px 0;
            background: var(--bg-white);
        }

        .recommend-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .recommend-card {
            position: relative;
            background: var(--bg-soft);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all .35s ease;
        }

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

        .recommend-card .card-thumb {
            position: relative;
            height: 200px;
            overflow: hidden;
        }

        .recommend-card .card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

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

        .recommend-card .card-thumb::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(12, 18, 34, 0.35), transparent 60%);
        }

        .recommend-card .card-body {
            padding: 26px 26px 30px;
        }

        .recommend-card .card-cat {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 30px;
            background: rgba(212, 168, 83, 0.15);
            border: 1px solid rgba(212, 168, 83, 0.3);
            color: #b68a2e;
            font-size: 12px;
            font-weight: 700;
            margin-bottom: 14px;
        }

        .recommend-card h3 {
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.45;
            margin-bottom: 10px;
        }

        .recommend-card p {
            color: var(--text-muted);
            font-size: 14.5px;
            line-height: 1.75;
            margin-bottom: 18px;
        }

        .recommend-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-weight: 700;
            font-size: 14px;
        }

        .recommend-card .card-link i {
            font-size: 13px;
            transition: transform .25s ease;
        }

        .recommend-card:hover .card-link i {
            transform: translateX(6px);
        }

        .category-section {
            padding: 80px 0;
            background: var(--bg-soft);
        }

        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .category-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 34px 30px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: all .35s ease;
            position: relative;
            overflow: hidden;
        }

        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent-light), var(--accent));
            transform: scaleX(0);
            transition: transform .4s ease;
        }

        .category-card:hover::before {
            transform: scaleX(1);
        }

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

        .category-card .cat-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 68px;
            height: 68px;
            border-radius: 20px;
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
            color: var(--primary);
            font-size: 28px;
            margin-bottom: 22px;
            box-shadow: 0 8px 22px rgba(212, 168, 83, 0.35);
        }

        .category-card h3 {
            font-size: 21px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .category-card p {
            color: var(--text-muted);
            font-size: 14.5px;
            line-height: 1.75;
            margin-bottom: 22px;
        }

        .category-card .card-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 9px 24px;
            border-radius: 40px;
            border: 1.5px solid var(--accent);
            color: #b68a2e;
            font-weight: 700;
            font-size: 14px;
            transition: all .3s ease;
        }

        .category-card .card-btn:hover {
            background: var(--accent);
            color: var(--primary);
            border-color: var(--accent);
            box-shadow: 0 8px 20px rgba(212, 168, 83, 0.3);
        }

        .faq-section {
            padding: 80px 0;
            background: var(--bg-white);
        }

        .faq-wrap {
            max-width: 850px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            background: var(--bg-soft);
            margin-bottom: 16px;
            overflow: hidden;
            transition: border-color .3s ease, box-shadow .3s ease;
        }

        .faq-item.active {
            border-color: rgba(212, 168, 83, 0.45);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            background: transparent;
            border: none;
            cursor: pointer;
            text-align: left;
            font-size: 16.5px;
            font-weight: 700;
            color: var(--primary);
            transition: color .25s ease;
        }

        .faq-question:hover {
            color: #b68a2e;
        }

        .faq-question .faq-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: rgba(212, 168, 83, 0.15);
            color: #b68a2e;
            font-size: 13px;
            flex-shrink: 0;
            transition: transform .3s ease, background .3s ease;
        }

        .faq-item.active .faq-icon {
            background: var(--accent);
            color: var(--primary);
            transform: rotate(180deg);
        }

        .faq-answer {
            display: none;
            padding: 0 24px 22px;
            color: #4c5565;
            font-size: 15.5px;
            line-height: 1.85;
        }

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

        .cta-banner {
            position: relative;
            padding: 90px 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center 40%;
            text-align: center;
            isolation: isolate;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            z-index: -1;
            background: linear-gradient(135deg, rgba(12, 18, 34, 0.92), rgba(12, 18, 34, 0.8));
        }

        .cta-banner .container {
            position: relative;
        }

        .cta-banner h2 {
            font-size: clamp(28px, 3.6vw, 40px);
            font-weight: 900;
            color: #ffffff;
            margin-bottom: 14px;
        }

        .cta-banner p {
            color: rgba(255, 255, 255, 0.78);
            font-size: 16.5px;
            max-width: 550px;
            margin: 0 auto 34px;
        }

        .cta-banner .btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        .site-footer {
            background: var(--primary);
            padding: 70px 0 30px;
            color: rgba(255, 255, 255, 0.72);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 16px;
        }

        .footer-brand i {
            color: var(--accent);
            transform: rotate(-12deg);
        }

        .footer-desc {
            font-size: 14.5px;
            line-height: 1.8;
            max-width: 360px;
        }

        .footer-heading {
            font-size: 17px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 18px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14.5px;
            color: rgba(255, 255, 255, 0.68);
            transition: all .25s ease;
        }

        .footer-links a i {
            font-size: 12px;
            color: var(--accent);
        }

        .footer-links a:hover {
            color: var(--accent-light);
            transform: translateX(4px);
        }

        .footer-bottom {
            padding-top: 28px;
            text-align: center;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
        }

        @media (max-width: 1024px) {
            :root {
                --section-space: 70px;
            }

            .article-layout {
                grid-template-columns: 1fr;
            }

            .article-sidebar {
                display: grid;
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }

            .sidebar-contact {
                grid-column: span 2;
            }

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

        @media (max-width: 768px) {
            .site-header {
                margin: 10px auto 0;
                padding: 10px 18px;
            }

            .site-header .nav-brand {
                font-size: 17px;
            }

            .nav-toggle {
                display: inline-flex;
            }

            .nav-menu {
                position: absolute;
                top: calc(100% + 10px);
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                gap: 6px;
                background: rgba(12, 18, 34, 0.97);
                border: 1px solid rgba(255, 255, 255, 0.12);
                border-radius: 24px;
                padding: 16px;
                box-shadow: 0 24px 50px rgba(0, 0, 0, 0.3);
                opacity: 0;
                visibility: hidden;
                transform: translateY(-10px);
                transition: all .3s ease;
            }

            .nav-menu.open {
                opacity: 1;
                visibility: visible;
                transform: translateY(0);
            }

            .nav-menu a {
                justify-content: center;
                padding: 13px 20px;
                color: rgba(255, 255, 255, 0.85);
                font-size: 16px;
            }

            .page-hero {
                padding: 150px 0 80px;
                margin-top: -70px;
            }

            .article-card {
                padding: 30px 24px;
            }

            .article-meta {
                gap: 12px 18px;
                flex-direction: column;
                align-items: flex-start;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

            .sidebar-contact {
                grid-column: auto;
            }

            .recommend-grid,
            .category-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }

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

            .cta-banner {
                padding: 70px 0;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .site-header {
                border-radius: 30px;
                padding: 8px 14px;
            }

            .site-header .nav-brand i {
                font-size: 18px;
            }

            .breadcrumb {
                font-size: 13px;
                padding: 6px 14px;
            }

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

            .article-card {
                padding: 24px 18px;
                border-radius: 18px;
            }

            .article-content {
                font-size: 15.5px;
            }

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

            .article-content h3 {
                font-size: 19px;
            }

            .sidebar-card {
                padding: 22px 18px;
            }

            .btn {
                padding: 11px 22px;
                font-size: 14px;
            }

            .section-head h2 {
                font-size: 26px;
            }

            .recommend-section,
            .category-section,
            .faq-section {
                padding: 60px 0;
            }

            .cta-banner h2 {
                font-size: 25px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #3b5bfd;
            --primary-dark: #2d47d0;
            --primary-light: #e8edff;
            --accent: #7c5cfc;
            --accent-light: #f0ebff;
            --dark: #0b1220;
            --dark-2: #131d33;
            --bg: #f4f6fc;
            --bg-white: #ffffff;
            --text: #1e2640;
            --text-light: #667085;
            --border: #e4e9f2;
            --radius: 20px;
            --radius-sm: 12px;
            --radius-xs: 8px;
            --shadow: 0 10px 40px rgba(20, 30, 60, .08);
            --shadow-hover: 0 18px 50px rgba(20, 30, 60, .14);
            --transition: .3s ease;
            --container-w: 1200px;
            --section-pad: 90px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }
        img {
            max-width: 100%;
            display: block;
        }
        ul,
        ol {
            list-style: none;
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        .container {
            max-width: var(--container-w);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: var(--section-pad) 0;
        }
        .section-alt {
            background: var(--bg-white);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 16px;
            left: 50%;
            transform: translateX(-50%);
            width: calc(100% - 32px);
            max-width: 1280px;
            background: rgba(255, 255, 255, .84);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-radius: 60px;
            box-shadow: 0 6px 28px rgba(15, 23, 42, .08);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 28px;
            z-index: 1000;
            border: 1px solid rgba(255, 255, 255, .6);
            transition: box-shadow var(--transition), background var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, .96);
            box-shadow: 0 10px 36px rgba(15, 23, 42, .12);
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: .5px;
            white-space: nowrap;
        }
        .nav-brand i {
            color: var(--primary);
            font-size: 1.4rem;
            background: var(--primary-light);
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-menu a {
            padding: 9px 20px;
            border-radius: 40px;
            font-size: .95rem;
            font-weight: 500;
            color: var(--text-light);
            transition: color var(--transition), background var(--transition), box-shadow var(--transition);
        }
        .nav-menu a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-menu a.active {
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            box-shadow: 0 4px 20px rgba(59, 91, 253, .35);
        }
        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 1.1rem;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition);
        }
        .nav-toggle:hover {
            background: var(--primary);
            color: #fff;
        }
        .nav-toggle.active {
            transform: rotate(90deg);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 180px 0 100px;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(11, 18, 32, .92) 20%, rgba(11, 18, 32, .72) 60%, rgba(59, 91, 253, .55) 100%);
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg) 0%, transparent 100%);
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, .65);
            font-size: .9rem;
            margin-bottom: 20px;
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb i {
            font-size: .7rem;
        }
        .page-banner h1 {
            font-size: clamp(2.2rem, 4.5vw, 3.4rem);
            font-weight: 900;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .page-banner-sub {
            font-size: clamp(1rem, 1.6vw, 1.2rem);
            color: rgba(255, 255, 255, .85);
            max-width: 640px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .banner-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
            border: 2px solid transparent;
            line-height: 1.4;
        }
        .btn i {
            font-size: .9em;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            box-shadow: 0 8px 28px rgba(59, 91, 253, .35);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 36px rgba(59, 91, 253, .45);
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, .6);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, .12);
            border-color: #fff;
            transform: translateY(-3px);
        }
        .btn-light {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 8px 28px rgba(15, 23, 42, .12);
        }
        .btn-light:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 36px rgba(15, 23, 42, .18);
        }

        /* ===== Section Header ===== */
        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }
        .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: .82rem;
            font-weight: 700;
            padding: 6px 18px;
            border-radius: 40px;
            margin-bottom: 14px;
            letter-spacing: .5px;
        }
        .section-header h2 {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 12px;
            color: var(--text);
        }
        .section-header p {
            color: var(--text-light);
            font-size: 1.05rem;
            line-height: 1.7;
        }

        /* ===== Capabilities Cards ===== */
        .capabilities-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .cap-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 36px 30px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(255, 255, 255, .8);
            transition: transform var(--transition), box-shadow var(--transition);
            position: relative;
            overflow: hidden;
        }
        .cap-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: opacity var(--transition);
        }
        .cap-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .cap-card:hover::before {
            opacity: 1;
        }
        .cap-icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: 20px;
        }
        .cap-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .cap-card p {
            color: var(--text-light);
            font-size: .93rem;
            line-height: 1.65;
        }

        /* ===== Flow ===== */
        .flow-section {
            background: var(--bg-white);
        }
        .flow-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            position: relative;
        }
        .flow-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
            opacity: .25;
        }
        .flow-step {
            text-align: center;
            position: relative;
            padding: 0 12px;
        }
        .flow-num {
            width: 80px;
            height: 80px;
            margin: 0 auto 22px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.5rem;
            font-weight: 800;
            box-shadow: 0 8px 28px rgba(59, 91, 253, .3);
            position: relative;
            z-index: 2;
            border: 4px solid var(--bg-white);
        }
        .flow-step h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .flow-step p {
            color: var(--text-light);
            font-size: .9rem;
            line-height: 1.6;
        }

        /* ===== Tools / Feature Split ===== */
        .tools-section {
            position: relative;
            overflow: hidden;
        }
        .tools-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .tools-media {
            position: relative;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--shadow-hover);
        }
        .tools-media img {
            width: 100%;
            height: 480px;
            object-fit: cover;
        }
        .tools-media::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(11, 18, 32, .45), transparent 60%);
        }
        .tools-media-badge {
            position: absolute;
            bottom: 24px;
            left: 24px;
            right: 24px;
            z-index: 2;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(8px);
            border-radius: 16px;
            padding: 18px 22px;
            display: flex;
            align-items: center;
            gap: 14px;
            box-shadow: 0 8px 30px rgba(15, 23, 42, .15);
        }
        .tools-media-badge i {
            font-size: 1.6rem;
            color: var(--primary);
            background: var(--primary-light);
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .tools-media-badge span {
            font-size: .95rem;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
        }
        .tools-content h2 {
            font-size: clamp(1.8rem, 3vw, 2.4rem);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 20px;
        }
        .tools-list {
            margin-top: 28px;
        }
        .tools-list li {
            display: flex;
            gap: 16px;
            padding: 14px 0;
            border-bottom: 1px solid var(--border);
        }
        .tools-list li:last-child {
            border-bottom: none;
        }
        .tools-list-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: .95rem;
            flex-shrink: 0;
        }
        .tools-list-text h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .tools-list-text p {
            font-size: .88rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== Stats ===== */
        .stats-section {
            background: linear-gradient(135deg, var(--dark), var(--dark-2));
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(59, 91, 253, .25), transparent 70%);
            top: -200px;
            right: -150px;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            position: relative;
            z-index: 2;
        }
        .stat-item {
            text-align: center;
            padding: 24px;
        }
        .stat-num {
            font-size: clamp(2.4rem, 4vw, 3.2rem);
            font-weight: 900;
            color: #fff;
            line-height: 1.1;
            margin-bottom: 8px;
            background: linear-gradient(135deg, #fff, #c6d0ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .stat-label {
            color: rgba(255, 255, 255, .7);
            font-size: 1rem;
            font-weight: 500;
        }
        .stat-divider {
            width: 32px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 4px;
            margin: 16px auto 0;
        }

        /* ===== News Cards ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .news-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid rgba(255, 255, 255, .8);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .news-cover {
            position: relative;
            height: 200px;
            overflow: hidden;
        }
        .news-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .news-card:hover .news-cover img {
            transform: scale(1.05);
        }
        .news-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(11, 18, 32, .3), transparent 60%);
        }
        .news-body {
            padding: 24px 26px 28px;
        }
        .news-tag {
            display: inline-block;
            background: var(--accent-light);
            color: var(--accent);
            font-size: .78rem;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 30px;
            margin-bottom: 12px;
        }
        .news-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 10px;
        }
        .news-body p {
            font-size: .88rem;
            color: var(--text-light);
            line-height: 1.6;
        }
        .news-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 18px;
            padding-top: 14px;
            border-top: 1px solid var(--border);
            font-size: .82rem;
            color: var(--text-light);
        }
        .news-meta a {
            color: var(--primary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .news-meta a:hover {
            gap: 10px;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow);
            border: 1px solid rgba(255, 255, 255, .8);
            margin-bottom: 16px;
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item.open {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 26px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            background: transparent;
            width: 100%;
            text-align: left;
            color: var(--text);
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: .85rem;
            flex-shrink: 0;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .faq-item.open .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
        }
        .faq-answer-inner {
            padding: 0 26px 24px;
            color: var(--text-light);
            font-size: .95rem;
            line-height: 1.75;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            padding: 90px 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            text-align: center;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 18, 32, .88), rgba(59, 91, 253, .75));
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: clamp(1.8rem, 3.5vw, 2.6rem);
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, .82);
            font-size: 1.05rem;
            max-width: 620px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark);
            padding: 70px 0 30px;
            color: rgba(255, 255, 255, .75);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 40px;
        }
        .footer-brand {
            font-size: 1.25rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }
        .footer-brand i {
            color: var(--primary);
            font-size: 1.5rem;
        }
        .footer-desc {
            font-size: .92rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, .6);
            max-width: 380px;
        }
        .footer-heading {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-heading::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, .65);
            font-size: .92rem;
            transition: color var(--transition), transform var(--transition);
        }
        .footer-links a:hover {
            color: #fff;
            transform: translateX(3px);
        }
        .footer-links i {
            font-size: .75rem;
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding-top: 24px;
            text-align: center;
            font-size: .85rem;
            color: rgba(255, 255, 255, .45);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            :root {
                --section-pad: 70px;
            }
            .capabilities-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .flow-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 48px 28px;
            }
            .flow-grid::before {
                display: none;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .tools-wrap {
                gap: 40px;
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .site-header {
                width: calc(100% - 24px);
                padding: 10px 18px;
                top: 12px;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-menu {
                position: fixed;
                top: 74px;
                left: 12px;
                right: 12px;
                background: #fff;
                border-radius: 20px;
                box-shadow: var(--shadow-hover);
                flex-direction: column;
                padding: 16px;
                gap: 6px;
                opacity: 0;
                visibility: hidden;
                transform: translateY(-12px);
                transition: opacity .3s ease, transform .3s ease, visibility .3s;
                z-index: 999;
            }
            .nav-menu.open {
                opacity: 1;
                visibility: visible;
                transform: translateY(0);
            }
            .nav-menu a {
                width: 100%;
                text-align: center;
                padding: 14px;
                border-radius: 12px;
            }
            .page-banner {
                padding: 140px 0 70px;
                background-attachment: scroll;
            }
            .capabilities-grid {
                grid-template-columns: 1fr;
            }
            .flow-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .tools-wrap {
                grid-template-columns: 1fr;
            }
            .tools-media img {
                height: 300px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .cta-section {
                background-attachment: scroll;
            }
        }
        @media (max-width: 520px) {
            .nav-brand {
                font-size: 1rem;
            }
            .nav-brand i {
                width: 30px;
                height: 30px;
                font-size: 1.1rem;
            }
            .banner-actions {
                flex-direction: column;
                width: 100%;
            }
            .banner-actions .btn {
                justify-content: center;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .container {
                padding: 0 18px;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .tools-media-badge {
                padding: 16px 18px;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: .93rem;
            }
            .faq-answer-inner {
                padding: 0 18px 20px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #0e1a2b;
            --primary-2: #162a44;
            --accent: #e8a33c;
            --accent-2: #ffd27a;
            --bg: #f6f7fb;
            --card-bg: #ffffff;
            --text: #152238;
            --muted: #5d6a80;
            --border: #e5e9f2;
            --radius: 18px;
            --radius-lg: 30px;
            --shadow: 0 18px 45px rgba(10, 20, 40, .08);
            --shadow-hover: 0 26px 60px rgba(10, 20, 40, .14);
            --transition: .25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
        }

        ul,
        ol {
            list-style: none;
        }

        button,
        input {
            font: inherit;
            border: none;
            outline: none;
        }

        .container {
            width: min(1180px, 92%);
            margin: 0 auto;
        }

        .section {
            padding: 96px 0;
        }

        .section-alt {
            background: #ffffff;
        }

        .section-head {
            max-width: 720px;
            margin: 0 auto 52px;
            text-align: center;
        }

        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(232, 163, 60, .12);
            color: var(--accent);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1px;
            padding: 8px 16px;
            border-radius: 40px;
            margin-bottom: 16px;
            border: 1px solid rgba(232, 163, 60, .28);
        }

        .section-head h2 {
            font-size: clamp(28px, 4vw, 42px);
            line-height: 1.25;
            color: var(--primary);
            letter-spacing: -.5px;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 13px 30px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 15px;
            line-height: 1.2;
            cursor: pointer;
            transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
            border: 1px solid transparent;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(232, 163, 60, .45);
            outline-offset: 3px;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent), #d68a1f);
            color: #1a1205;
            box-shadow: 0 14px 30px rgba(216, 143, 32, .32);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 20px 40px rgba(216, 143, 32, .42);
        }

        .btn-ghost {
            background: rgba(255, 255, 255, .12);
            border-color: rgba(255, 255, 255, .35);
            color: #fff;
            backdrop-filter: blur(6px);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, .22);
            transform: translateY(-3px);
        }

        .btn-dark {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 14px 30px rgba(14, 26, 43, .25);
        }

        .btn-dark:hover {
            transform: translateY(-3px);
            box-shadow: 0 20px 42px rgba(14, 26, 43, .35);
        }

        .site-header {
            position: fixed;
            top: 18px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1000;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            width: min(1120px, calc(100% - 40px));
            padding: 10px 16px 10px 22px;
            background: rgba(255, 255, 255, .82);
            backdrop-filter: blur(16px);
            border-radius: 60px;
            border: 1px solid rgba(255, 255, 255, .65);
            box-shadow: 0 16px 40px rgba(0, 0, 0, .1);
            transition: box-shadow .3s ease, background .3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 20px 50px rgba(0, 0, 0, .16);
            background: rgba(255, 255, 255, .94);
        }

        .nav-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -.2px;
            white-space: nowrap;
        }

        .nav-brand i {
            font-size: 22px;
            color: var(--accent);
            background: rgba(232, 163, 60, .15);
            padding: 8px;
            border-radius: 50%;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-menu a {
            padding: 9px 18px;
            border-radius: 40px;
            font-size: 14px;
            font-weight: 600;
            color: var(--muted);
            transition: background .25s ease, color .25s ease;
            white-space: nowrap;
        }

        .nav-menu a:hover {
            color: var(--primary);
            background: rgba(14, 26, 43, .06);
        }

        .nav-menu a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 20px rgba(14, 26, 43, .22);
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            font-size: 16px;
            cursor: pointer;
            transition: transform .25s ease;
        }

        .nav-toggle:hover {
            transform: rotate(90deg);
        }

        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            isolation: isolate;
            overflow: hidden;
            padding: 140px 0 100px;
        }

        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            z-index: -1;
            background: linear-gradient(180deg, rgba(8, 15, 30, .45) 0%, rgba(8, 15, 30, .78) 100%),
                radial-gradient(circle at 80% 20%, rgba(232, 163, 60, .25), transparent 50%);
        }

        .hero::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 220px;
            background: linear-gradient(180deg, transparent, rgba(246, 247, 251, .95));
            z-index: 0;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 860px;
        }

        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 40px;
            background: rgba(255, 255, 255, .14);
            border: 1px solid rgba(255, 255, 255, .28);
            color: #fff;
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 1px;
            backdrop-filter: blur(8px);
            margin-bottom: 28px;
        }

        .hero-eyebrow i {
            color: var(--accent-2);
        }

        .hero-content h1 {
            font-size: clamp(34px, 5.6vw, 68px);
            line-height: 1.15;
            color: #fff;
            font-weight: 900;
            letter-spacing: -1px;
            text-shadow: 0 6px 30px rgba(0, 0, 0, .3);
            margin-bottom: 24px;
        }

        .hero-content h1 span {
            color: var(--accent-2);
        }

        .hero-content p {
            font-size: clamp(16px, 2vw, 19px);
            color: rgba(255, 255, 255, .85);
            max-width: 660px;
            margin: 0 auto 38px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .hero-info-bar {
            position: relative;
            z-index: 2;
            margin-top: 72px;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .2);
            border-radius: var(--radius-lg);
            padding: 28px 30px;
            backdrop-filter: blur(12px);
            max-width: 880px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-info-bar .info-item {
            text-align: center;
        }

        .hero-info-bar .info-item strong {
            display: block;
            font-size: 28px;
            font-weight: 900;
            color: #fff;
            line-height: 1.2;
        }

        .hero-info-bar .info-item span {
            font-size: 13px;
            color: rgba(255, 255, 255, .75);
            margin-top: 4px;
            display: block;
        }

        .hero-info-bar .info-item+.info-item {
            border-left: 1px solid rgba(255, 255, 255, .18);
        }

        .support-intro {
            background: var(--bg);
            padding: 96px 0 80px;
        }

        .intro-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .intro-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 36px 32px;
            box-shadow: var(--shadow);
            transition: transform .3s ease, box-shadow .3s ease;
            position: relative;
            overflow: hidden;
        }

        .intro-card::after {
            content: "";
            position: absolute;
            top: -60px;
            right: -60px;
            width: 130px;
            height: 130px;
            background: radial-gradient(circle, rgba(232, 163, 60, .15), transparent 70%);
            border-radius: 50%;
        }

        .intro-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
        }

        .intro-card .card-icon {
            width: 58px;
            height: 58px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            background: linear-gradient(135deg, var(--accent), var(--accent-2));
            color: #1a1205;
            margin-bottom: 22px;
            box-shadow: 0 12px 24px rgba(232, 163, 60, .3);
        }

        .intro-card h3 {
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .intro-card p {
            font-size: 15px;
            color: var(--muted);
            margin-bottom: 16px;
        }

        .intro-card a {
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap .25s ease;
        }

        .intro-card a:hover {
            gap: 12px;
        }

        .guide-steps {
            background: var(--primary);
            padding: 96px 0;
            position: relative;
            overflow: hidden;
        }

        .guide-steps::before {
            content: "";
            position: absolute;
            width: 480px;
            height: 480px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(232, 163, 60, .2), transparent 65%);
            top: -160px;
            right: -80px;
        }

        .guide-steps .section-head h2 {
            color: #fff;
        }

        .guide-steps .section-head p {
            color: rgba(255, 255, 255, .7);
        }

        .guide-steps .section-head .eyebrow {
            color: var(--accent-2);
            border-color: rgba(255, 210, 122, .4);
            background: rgba(255, 210, 122, .1);
        }

        .steps-grid {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 26px;
            margin-top: 24px;
        }

        .step-card {
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .12);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            text-align: center;
            backdrop-filter: blur(8px);
            transition: background .3s ease, transform .3s ease;
        }

        .step-card:hover {
            background: rgba(255, 255, 255, .14);
            transform: translateY(-8px);
        }

        .step-num {
            width: 56px;
            height: 56px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--accent-2));
            color: #1a1205;
            font-size: 20px;
            font-weight: 900;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 12px 24px rgba(232, 163, 60, .35);
        }

        .step-card h3 {
            color: #fff;
            font-size: 19px;
            font-weight: 800;
            margin-bottom: 10px;
        }

        .step-card p {
            color: rgba(255, 255, 255, .68);
            font-size: 14px;
        }

        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .article-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: transform .3s ease, box-shadow .3s ease;
            display: flex;
            flex-direction: column;
        }

        .article-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
        }

        .article-card .cover {
            position: relative;
            height: 190px;
            overflow: hidden;
        }

        .article-card .cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .article-card:hover .cover img {
            transform: scale(1.06);
        }

        .article-card .cover::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent, rgba(14, 26, 43, .2));
        }

        .article-card .tag {
            position: absolute;
            left: 18px;
            bottom: 16px;
            z-index: 1;
            font-size: 12px;
            font-weight: 700;
            padding: 5px 12px;
            background: rgba(255, 255, 255, .9);
            border-radius: 30px;
            color: var(--primary);
        }

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

        .article-card .body h3 {
            font-size: 18px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.45;
            margin-bottom: 10px;
        }

        .article-card .body p {
            font-size: 14px;
            color: var(--muted);
            flex: 1;
            margin-bottom: 18px;
        }

        .article-card .body .meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid var(--border);
            padding-top: 16px;
            font-size: 13px;
            color: var(--muted);
        }

        .article-card .body .meta a {
            color: var(--accent);
            font-weight: 700;
            transition: gap .25s ease;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .article-card .body .meta a:hover {
            gap: 10px;
        }

        .security-tip {
            background: linear-gradient(135deg, #14283f, #0e1a2b);
            padding: 88px 0;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .security-tip::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: .18;
        }

        .security-wrap {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1.1fr .9fr;
            gap: 50px;
            align-items: center;
        }

        .security-wrap h2 {
            font-size: clamp(28px, 4vw, 40px);
            margin-bottom: 20px;
            line-height: 1.25;
        }

        .security-wrap h2 span {
            color: var(--accent-2);
        }

        .security-wrap p {
            color: rgba(255, 255, 255, .75);
            margin-bottom: 28px;
            font-size: 15px;
        }

        .security-list {
            display: grid;
            gap: 14px;
        }

        .security-list li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            background: rgba(255, 255, 255, .08);
            border-radius: 14px;
            padding: 14px 18px;
            border: 1px solid rgba(255, 255, 255, .1);
            font-size: 14px;
            color: rgba(255, 255, 255, .85);
        }

        .security-list li i {
            color: var(--accent-2);
            margin-top: 3px;
        }

        .security-visual {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 30px 60px rgba(0, 0, 0, .35);
            border: 1px solid rgba(255, 255, 255, .15);
        }

        .security-visual img {
            width: 100%;
            height: 340px;
            object-fit: cover;
        }

        .faq-section {
            background: var(--bg);
            padding: 96px 0;
        }

        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: grid;
            gap: 16px;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 18px;
            box-shadow: 0 8px 24px rgba(10, 20, 40, .05);
            overflow: hidden;
            transition: box-shadow .3s ease;
        }

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

        .faq-item summary {
            cursor: pointer;
            list-style: none;
            padding: 22px 26px;
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            position: relative;
        }

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

        .faq-item summary::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--accent);
            font-size: 14px;
            transition: transform .3s ease;
            width: 30px;
            height: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(232, 163, 60, .12);
            flex-shrink: 0;
        }

        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }

        .faq-item .faq-answer {
            padding: 0 26px 22px;
            color: var(--muted);
            font-size: 14px;
            line-height: 1.9;
            border-top: 1px dashed var(--border);
            margin: 0 26px;
            padding-left: 0;
            padding-right: 0;
        }

        .cta-section {
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            position: relative;
            padding: 96px 0;
            text-align: center;
            isolation: isolate;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            z-index: -1;
            background: linear-gradient(135deg, rgba(14, 26, 43, .92), rgba(14, 26, 43, .75));
        }

        .cta-section h2 {
            color: #fff;
            font-size: clamp(28px, 4vw, 44px);
            font-weight: 900;
            margin-bottom: 16px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, .8);
            max-width: 600px;
            margin: 0 auto 36px;
            font-size: 16px;
        }

        .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .site-footer {
            background: #0b1420;
            color: rgba(255, 255, 255, .7);
            padding: 64px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 44px;
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }

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

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
            color: rgba(255, 255, 255, .6);
        }

        .footer-heading {
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            margin-bottom: 16px;
        }

        .footer-links {
            display: grid;
            gap: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color .25s ease, padding-left .25s ease;
        }

        .footer-links a:hover {
            color: var(--accent-2);
            padding-left: 6px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding-top: 24px;
            font-size: 13px;
            text-align: center;
            color: rgba(255, 255, 255, .45);
        }

        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .hero-info-bar {
                padding: 20px;
                gap: 12px;
            }
        }

        @media (max-width: 900px) {
            .section {
                padding: 72px 0;
            }

            .site-header {
                padding: 8px 12px 8px 18px;
            }

            .nav-menu {
                position: fixed;
                top: 76px;
                left: 50%;
                transform: translateX(-50%) translateY(-16px);
                width: calc(100% - 40px);
                max-width: 480px;
                background: rgba(255, 255, 255, .97);
                backdrop-filter: blur(16px);
                border-radius: 24px;
                flex-direction: column;
                align-items: stretch;
                padding: 16px;
                gap: 6px;
                box-shadow: 0 24px 60px rgba(0, 0, 0, .18);
                border: 1px solid rgba(255, 255, 255, .7);
                opacity: 0;
                visibility: hidden;
                pointer-events: none;
                transition: opacity .3s ease, transform .3s ease, visibility .3s ease;
            }

            .nav-menu.open {
                opacity: 1;
                visibility: visible;
                pointer-events: auto;
                transform: translateX(-50%) translateY(0);
            }

            .nav-menu a {
                padding: 13px 18px;
                border-radius: 16px;
                text-align: center;
            }

            .nav-toggle {
                display: inline-flex;
                flex-shrink: 0;
            }

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

            .security-wrap {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 34px;
            }

            .hero {
                min-height: auto;
                padding: 140px 0 80px;
            }

            .hero-info-bar {
                grid-template-columns: 1fr;
                margin-top: 50px;
            }

            .hero-info-bar .info-item+.info-item {
                border-left: none;
                border-top: 1px solid rgba(255, 255, 255, .18);
                padding-top: 16px;
            }
        }

        @media (max-width: 620px) {
            .container {
                width: 90%;
            }

            .section {
                padding: 60px 0;
            }

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

            .hero-content h1 {
                font-size: 30px;
            }

            .hero-content p {
                font-size: 15px;
            }

            .btn {
                width: 100%;
                max-width: 340px;
                margin: 0 auto;
            }

            .hero-actions {
                flex-direction: column;
            }

            .faq-item summary {
                font-size: 15px;
                padding: 18px 18px;
            }

            .faq-item .faq-answer {
                font-size: 13px;
                padding-bottom: 18px;
            }

            .article-card .body {
                padding: 20px;
            }

            .security-visual img {
                height: 240px;
            }
        }

        @media (max-width: 420px) {
            .nav-brand {
                font-size: 15px;
            }

            .nav-brand i {
                font-size: 17px;
                padding: 7px;
            }

            .site-header {
                width: calc(100% - 24px);
                top: 12px;
                border-radius: 40px;
            }

            .nav-menu {
                top: 68px;
                width: calc(100% - 24px);
            }
        }