/* roulang page: index */
:root {
            --primary: #d4af37;
            --primary-dark: #b8962e;
            --bg-deep: #070d1a;
            --bg-card: #131c2e;
            --bg-soft: #f8f7f2;
            --text-light: #f1f5f9;
            --text-muted: #94a3b8;
            --border-alpha: rgba(212, 175, 55, .22);
            --radius-lg: 22px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-lg: 0 24px 50px rgba(0, 0, 0, .45);
            --shadow-md: 0 10px 30px rgba(0, 0, 0, .25);
            --transition: all .35s cubic-bezier(.4, 0, .2, 1);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg-deep);
            color: var(--text-light);
            line-height: 1.7;
            -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;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width:640px) {
            .container {
                padding: 0 18px;
            }
        }

        /* ---- 导航 ---- */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(7, 13, 26, .82);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-alpha);
            transition: var(--transition);
        }
        .site-header:hover {
            background: rgba(7, 13, 26, .95);
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo {
            font-size: 1.28rem;
            font-weight: 800;
            letter-spacing: .04em;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
        }
        .logo-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 12px rgba(212, 175, 55, .7);
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-links a {
            position: relative;
            font-size: .92rem;
            font-weight: 500;
            color: rgba(241, 245, 249, .78);
            padding: 6px 2px;
            letter-spacing: .02em;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            left: 50%;
            bottom: 0;
            transform: translateX(-50%) scaleX(0);
            width: 100%;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            transition: transform .3s;
        }
        .nav-links a:hover {
            color: #fff;
        }
        .nav-links a:hover::after {
            transform: translateX(-50%) scaleX(.8);
        }
        .nav-links a.active {
            color: var(--primary);
        }
        .nav-links a.active::after {
            transform: translateX(-50%) scaleX(1);
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--primary), #f3d97a) !important;
            color: #0b1120 !important;
            padding: 9px 22px !important;
            border-radius: 50px;
            font-weight: 700;
            font-size: .88rem !important;
            transition: var(--transition);
        }
        .nav-cta::after {
            display: none !important;
        }
        .nav-cta:hover {
            box-shadow: 0 6px 20px rgba(212, 175, 55, .4);
            transform: translateY(-2px);
            color: #0b1120 !important;
        }
        .menu-toggle {
            display: none;
            font-size: 1.5rem;
            color: #fff;
            padding: 6px;
            z-index: 110;
        }
        @media (max-width:900px) {
            .menu-toggle {
                display: block;
            }
            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 78%;
                max-width: 360px;
                height: 100vh;
                flex-direction: column;
                gap: 10px;
                background: rgba(7, 13, 26, .98);
                backdrop-filter: blur(24px);
                border-left: 1px solid var(--border-alpha);
                padding: 90px 30px 30px;
                transition: right .45s cubic-bezier(.4, 0, .2, 1);
                align-items: flex-start;
            }
            .nav-links.open {
                right: 0;
            }
            .nav-links a {
                width: 100%;
                font-size: 1rem;
                padding: 10px 0;
                border-bottom: 1px solid rgba(255, 255, 255, .06);
            }
            .nav-cta {
                margin-top: 12px;
                text-align: center;
                width: 100%;
                border-radius: 12px !important;
            }
        }

        /* ---- Hero ---- */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 140px 0 90px;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(7, 13, 26, .92) 0%, rgba(7, 13, 26, .72) 45%, rgba(7, 13, 26, .25) 100%);
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 180px;
            background: linear-gradient(to top, rgba(7, 13, 26, 1), transparent);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 680px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(212, 175, 55, .12);
            border: 1px solid var(--border-alpha);
            border-radius: 50px;
            padding: 8px 20px;
            font-size: .82rem;
            font-weight: 500;
            color: var(--primary);
            letter-spacing: .05em;
            margin-bottom: 26px;
        }
        .hero h1 {
            font-size: 3.4rem;
            line-height: 1.2;
            font-weight: 800;
            letter-spacing: .02em;
            margin-bottom: 20px;
            color: #fff;
        }
        .hero h1 span {
            background: linear-gradient(135deg, var(--primary), #f3d97a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.1rem;
            color: rgba(241, 245, 249, .82);
            line-height: 1.8;
            margin-bottom: 34px;
            max-width: 560px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 44px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--primary), #f3d97a);
            color: #0b1120 !important;
            font-weight: 700;
            padding: 14px 34px;
            border-radius: 50px;
            font-size: .95rem;
            transition: var(--transition);
        }
        .btn-primary:hover {
            box-shadow: 0 10px 30px rgba(212, 175, 55, .35);
            transform: translateY(-3px);
        }
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            border: 1px solid rgba(241, 245, 249, .3);
            color: #f1f5f9;
            font-weight: 500;
            padding: 14px 30px;
            border-radius: 50px;
            font-size: .95rem;
            transition: var(--transition);
        }
        .btn-ghost:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(212, 175, 55, .08);
        }
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            max-width: 580px;
            padding-top: 34px;
            border-top: 1px solid rgba(255, 255, 255, .1);
        }
        .hero-stat .num {
            font-size: 1.9rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: .8rem;
            color: rgba(241, 245, 249, .6);
            margin-top: 4px;
        }
        @media (max-width:640px) {
            .hero {
                padding: 120px 0 60px;
                min-height: auto;
            }
            .hero h1 {
                font-size: 2.1rem;
            }
            .hero-desc {
                font-size: .98rem;
            }
            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }

        /* ---- 通用板块 ---- */
        .section {
            padding: 90px 0;
        }
        .section-alt {
            background: rgba(255, 255, 255, .02);
            border-top: 1px solid rgba(212, 175, 55, .07);
            border-bottom: 1px solid rgba(212, 175, 55, .07);
        }
        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 60px;
        }
        .section-tag {
            display: inline-block;
            font-size: .8rem;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: .08em;
            text-transform: uppercase;
            margin-bottom: 12px;
            border: 1px solid var(--border-alpha);
            border-radius: 50px;
            padding: 6px 18px;
            background: rgba(212, 175, 55, .06);
        }
        .section-head h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 16px;
        }
        .section-head p {
            color: rgba(241, 245, 249, .64);
            font-size: .98rem;
            line-height: 1.8;
        }
        @media (max-width:640px) {
            .section {
                padding: 60px 0;
            }
            .section-head h2 {
                font-size: 1.7rem;
            }
        }

        /* ---- 核心特性 ---- */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: rgba(19, 28, 46, .6);
            border: 1px solid rgba(255, 255, 255, .06);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
        }
        .feature-card:hover {
            border-color: var(--border-alpha);
            background: rgba(19, 28, 46, .9);
            transform: translateY(-8px);
            box-shadow: var(--shadow-md);
        }
        .feature-icon {
            width: 62px;
            height: 62px;
            border-radius: 18px;
            background: linear-gradient(135deg, rgba(212, 175, 55, .2), rgba(212, 175, 55, .05));
            border: 1px solid var(--border-alpha);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 22px;
            font-size: 1.5rem;
            color: var(--primary);
        }
        .feature-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: .88rem;
            color: rgba(241, 245, 249, .6);
            line-height: 1.7;
        }
        @media (max-width:1024px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width:560px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ---- 分类卡片 ---- */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, .08);
            background: var(--bg-card);
            transition: var(--transition);
            min-height: 340px;
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            transform: translateY(-10px);
            border-color: var(--border-alpha);
            box-shadow: var(--shadow-lg);
        }
        .category-card .cover {
            height: 190px;
            overflow: hidden;
            position: relative;
        }
        .category-card .cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s;
        }
        .category-card:hover .cover img {
            transform: scale(1.06);
        }
        .category-card .cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(7, 13, 26, .7), transparent);
        }
        .category-card .body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card .body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .category-card .body p {
            font-size: .87rem;
            color: rgba(241, 245, 249, .6);
            line-height: 1.7;
            flex: 1;
        }
        .category-link {
            margin-top: 16px;
            font-size: .88rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .category-link i {
            transition: transform .3s;
        }
        .category-card:hover .category-link i {
            transform: translateX(4px);
        }
        @media (max-width:900px) {
            .category-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ---- 资讯列表 ---- */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .news-card {
            background: rgba(19, 28, 46, .55);
            border: 1px solid rgba(255, 255, 255, .06);
            border-radius: var(--radius-md);
            padding: 26px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            border-color: var(--border-alpha);
            background: rgba(19, 28, 46, .9);
            transform: translateY(-4px);
        }
        .news-tag {
            display: inline-flex;
            align-self: flex-start;
            font-size: .75rem;
            font-weight: 600;
            color: var(--primary);
            background: rgba(212, 175, 55, .1);
            border: 1px solid var(--border-alpha);
            padding: 3px 14px;
            border-radius: 50px;
            margin-bottom: 14px;
        }
        .news-card h3 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.5;
            margin-bottom: 10px;
        }
        .news-card h3 a:hover {
            color: var(--primary);
        }
        .news-card p {
            font-size: .88rem;
            color: rgba(241, 245, 249, .55);
            line-height: 1.7;
            flex: 1;
        }
        .news-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 18px;
            padding-top: 14px;
            border-top: 1px solid rgba(255, 255, 255, .05);
            font-size: .82rem;
            color: rgba(241, 245, 249, .45);
        }
        .news-meta a {
            color: var(--primary);
            font-weight: 600;
            font-size: .82rem;
        }
        .news-meta a:hover {
            text-decoration: underline;
        }
        @media (max-width:768px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ---- 流程 ---- */
        .flow-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: flow;
        }
        .flow-step {
            text-align: center;
            padding: 36px 20px;
            border-radius: var(--radius-lg);
            background: rgba(19, 28, 46, .5);
            border: 1px solid rgba(255, 255, 255, .06);
            position: relative;
            transition: var(--transition);
        }
        .flow-step:hover {
            border-color: var(--border-alpha);
            transform: translateY(-5px);
        }
        .flow-num {
            width: 44px;
            height: 44px;
            margin: 0 auto 18px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), #f3d97a);
            color: #0b1120;
            font-weight: 800;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flow-step h3 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .flow-step p {
            font-size: .85rem;
            color: rgba(241, 245, 249, .55);
            line-height: 1.7;
        }
        @media (max-width:900px) {
            .flow-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width:520px) {
            .flow-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ---- 图文区 ---- */
        .showcase {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .showcase-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-alpha);
            box-shadow: var(--shadow-lg);
        }
        .showcase-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 360px;
        }
        .showcase-content h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 18px;
        }
        .showcase-content p {
            font-size: .95rem;
            color: rgba(241, 245, 249, .65);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .showcase-list {
            list-style: none;
            margin: 24px 0;
        }
        .showcase-list li {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 0;
            font-size: .92rem;
            color: rgba(241, 245, 249, .75);
        }
        .showcase-list li i {
            color: var(--primary);
            font-size: 1rem;
            width: 20px;
            text-align: center;
        }
        @media (max-width:900px) {
            .showcase {
                grid-template-columns: 1fr;
                gap: 36px;
            }
        }

        /* ---- FAQ ---- */
        .faq-wrap {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: rgba(19, 28, 46, .5);
            border: 1px solid rgba(255, 255, 255, .06);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-alpha);
        }
        .faq-item summary {
            padding: 20px 26px;
            font-size: .98rem;
            font-weight: 600;
            color: #fff;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: .8rem;
            color: var(--primary);
            transition: transform .3s;
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item .faq-body {
            padding: 0 26px 22px;
            color: rgba(241, 245, 249, .62);
            font-size: .9rem;
            line-height: 1.8;
        }

        /* ---- CTA ---- */
        .cta-section {
            position: relative;
            padding: 100px 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            text-align: center;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(7, 13, 26, .82);
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            max-width: 680px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 18px;
        }
        .cta-inner p {
            font-size: 1.05rem;
            color: rgba(241, 245, 249, .75);
            margin-bottom: 36px;
            line-height: 1.8;
        }
        .btn-primary-lg {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            background: linear-gradient(135deg, var(--primary), #f3d97a);
            color: #0b1120 !important;
            font-weight: 800;
            padding: 18px 46px;
            border-radius: 50px;
            font-size: 1.05rem;
            transition: var(--transition);
            box-shadow: 0 8px 30px rgba(212, 175, 55, .3);
        }
        .btn-primary-lg:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 40px rgba(212, 175, 55, .45);
        }
        @media (max-width:640px) {
            .cta-inner h2 {
                font-size: 1.7rem;
            }
        }

        /* ---- 页脚 ---- */
        .site-footer {
            background: #050a14;
            border-top: 1px solid rgba(212, 175, 55, .1);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: .88rem;
            color: rgba(241, 245, 249, .5);
            line-height: 1.8;
            max-width: 340px;
        }
        .footer-col h4 {
            font-size: .92rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: .05em;
        }
        .footer-col a {
            display: block;
            padding: 5px 0;
            font-size: .88rem;
            color: rgba(241, 245, 249, .5);
        }
        .footer-col a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .05);
            padding-top: 24px;
            text-align: center;
            font-size: .82rem;
            color: rgba(241, 245, 249, .35);
        }
        .footer-bottom a {
            color: rgba(241, 245, 249, .45);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }
        @media (max-width:768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --primary-light: #e0e7ff;
            --accent: #06b6d4;
            --bg: #f8fafc;
            --surface: #ffffff;
            --text: #1e293b;
            --muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --shadow: 0 4px 24px rgba(0,0,0,0.06);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a { text-decoration: none; color: inherit; }
        img { max-width: 100%; display: block; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

        .site-header {
            background: rgba(255,255,255,0.88);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            transition: box-shadow 0.3s;
        }
        .site-header.scrolled { box-shadow: 0 4px 24px rgba(0,0,0,0.06); }
        .nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
        .logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 21px; color: var(--text); letter-spacing: -0.5px; }
        .logo-dot {
            width: 10px; height: 10px; border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: inline-block; flex-shrink: 0;
            box-shadow: 0 0 0 4px rgba(99,102,241,0.15);
        }
        .nav-links { display: flex; align-items: center; gap: 32px; }
        .nav-links a { text-decoration: none; color: var(--muted); font-size: 15px; font-weight: 500; position: relative; padding: 6px 0; transition: color 0.3s; }
        .nav-links a:hover { color: var(--primary); }
        .nav-links a.active { color: var(--primary); font-weight: 600; }
        .nav-links a.active::after {
            content: ''; position: absolute; left: 0; bottom: 0; width: 100%; height: 2px;
            background: var(--primary); border-radius: 2px;
        }
        .nav-links .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff !important; padding: 10px 26px; border-radius: 50px;
            font-weight: 600; font-size: 14px;
            transition: all 0.3s;
        }
        .nav-links .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(99,102,241,0.35); color: #fff !important; }
        .nav-toggle { display: none; background: none; border: none; font-size: 24px; color: var(--text); cursor: pointer; line-height: 1; }

        .page-banner {
            position: relative; padding: 100px 0 120px;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover; background-position: center;
        }
        .page-banner::before {
            content: ''; position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.92), rgba(99,102,241,0.78));
        }
        .page-banner .container { position: relative; z-index: 2; }
        .banner-tag {
            display: inline-flex; align-items: center; gap: 8px;
            background: rgba(255,255,255,0.14); border: 1px solid rgba(255,255,255,0.25);
            color: #fff; padding: 8px 18px; border-radius: 50px;
            font-size: 13px; font-weight: 600; backdrop-filter: blur(8px); letter-spacing: 0.5px;
        }
        .page-banner h1 { color: #fff; font-size: 44px; font-weight: 800; margin: 20px 0 16px; line-height: 1.25; letter-spacing: -1px; }
        .page-banner p { color: rgba(255,255,255,0.85); font-size: 17px; max-width: 620px; line-height: 1.8; }
        .banner-meta { display: flex; gap: 28px; margin-top: 32px; flex-wrap: wrap; }
        .banner-meta span { display: inline-flex; align-items: center; gap: 8px; color: rgba(255,255,255,0.85); font-size: 14px; }
        .banner-meta i { color: rgba(255,255,255,0.6); }

        .section { padding: 80px 0; }
        .section-tight { padding: 60px 0; }
        .section-header { text-align: center; margin-bottom: 52px; }
        .section-header .subtitle {
            color: var(--primary); font-size: 13px; font-weight: 700;
            text-transform: uppercase; letter-spacing: 2px;
            display: inline-flex; align-items: center; gap: 8px; margin-bottom: 12px;
        }
        .section-header h2 { font-size: 32px; font-weight: 800; color: var(--text); letter-spacing: -0.5px; line-height: 1.3; }
        .section-header p { color: var(--muted); font-size: 16px; margin-top: 12px; max-width: 640px; margin-left: auto; margin-right: auto; }

        .card {
            background: var(--surface); border-radius: var(--radius);
            border: 1px solid var(--border); box-shadow: var(--shadow);
            transition: all 0.35s ease; overflow: hidden;
        }
        .card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(0,0,0,0.1); border-color: rgba(99,102,241,0.3); }

        .feature-card { padding: 32px; }
        .feature-icon {
            width: 56px; height: 56px; border-radius: 14px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex; align-items: center; justify-content: center;
            color: #fff; font-size: 22px; margin-bottom: 20px;
            box-shadow: 0 8px 20px rgba(99,102,241,0.25);
        }
        .feature-card h3 { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 10px; }
        .feature-card p { color: var(--muted); font-size: 14px; line-height: 1.7; }

        .step-number {
            width: 56px; height: 56px; border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex; align-items: center; justify-content: center;
            color: #fff; font-weight: 800; font-size: 20px; margin-bottom: 16px;
            box-shadow: 0 8px 20px rgba(99,102,241,0.3);
        }
        .step-item h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
        .step-item p { color: var(--muted); font-size: 14px; line-height: 1.7; }

        .cover-card { position: relative; border-radius: var(--radius); overflow: hidden; }
        .cover-card img { width: 100%; height: 220px; object-fit: cover; }
        .cover-card .cover-overlay {
            position: absolute; inset: 0; padding: 24px;
            background: linear-gradient(to top, rgba(15,23,42,0.9), rgba(15,23,42,0.2));
            display: flex; flex-direction: column; justify-content: flex-end; color: #fff;
        }
        .cover-card .cover-tag {
            display: inline-block; background: rgba(255,255,255,0.2); backdrop-filter: blur(6px);
            color: #fff; font-size: 12px; font-weight: 600; padding: 4px 12px;
            border-radius: 50px; margin-bottom: 10px; width: fit-content;
        }
        .cover-card h3 { font-size: 18px; font-weight: 700; }
        .cover-card p { font-size: 13px; opacity: 0.85; margin-top: 5px; }

        .compare-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 16px; overflow: hidden; box-shadow: var(--shadow); }
        .compare-table th { background: #f8fafc; padding: 16px 20px; font-weight: 700; text-align: left; font-size: 14px; color: var(--text); border-bottom: 1px solid var(--border); }
        .compare-table td { padding: 16px 20px; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: var(--muted); }
        .compare-table tr:last-child td { border-bottom: none; }
        .compare-table td:first-child { color: var(--text); font-weight: 600; }
        .badge-yes { display: inline-flex; align-items: center; gap: 4px; background: #ecfdf5; color: #059669; padding: 4px 10px; border-radius: 50px; font-size: 12px; font-weight: 600; }
        .badge-no { display: inline-flex; align-items: center; gap: 4px; background: #fef2f2; color: #dc2626; padding: 4px 10px; border-radius: 50px; font-size: 12px; font-weight: 600; }

        .faq-item {
            background: #fff; border: 1px solid var(--border); border-radius: 14px;
            padding: 28px; transition: all 0.3s;
        }
        .faq-item:hover { border-color: rgba(99,102,241,0.3); box-shadow: 0 4px 16px rgba(0,0,0,0.04); }
        .faq-question { font-weight: 600; font-size: 16px; color: var(--text); display: flex; justify-content: space-between; align-items: center; gap: 16px; }
        .faq-question i { color: var(--primary); font-size: 14px; flex-shrink: 0; }
        .faq-answer { color: var(--muted); font-size: 15px; margin-top: 12px; line-height: 1.7; }

        .cta-section {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 24px; padding: 56px 48px; position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ''; position: absolute; top: -60px; right: -60px;
            width: 200px; height: 200px; border-radius: 50%;
            background: rgba(255,255,255,0.08);
        }
        .cta-section h2 { color: #fff; font-size: 28px; font-weight: 800; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.9); font-size: 16px; max-width: 560px; }
        .cta-btn {
            background: #fff; color: var(--primary); padding: 14px 34px;
            border-radius: 50px; font-weight: 700; font-size: 15px;
            display: inline-flex; align-items: center; gap: 8px;
            transition: all 0.3s; margin-top: 24px;
        }
        .cta-btn:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(0,0,0,0.15); }

        .site-footer { background: #0f172a; color: #94a3b8; padding: 64px 0 24px; margin-top: 80px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 40px; }
        .footer-brand .logo { color: #fff; font-size: 22px; }
        .footer-brand p { margin-top: 16px; font-size: 14px; line-height: 1.8; color: #94a3b8; }
        .footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 16px; font-weight: 700; }
        .footer-col a { display: block; color: #94a3b8; font-size: 14px; padding: 6px 0; transition: color 0.3s; }
        .footer-col a:hover { color: #fff; }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 24px; text-align: center; font-size: 13px; color: #64748b; }

        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .container { padding: 0 20px; }
            .nav-links {
                display: none; position: absolute; top: 72px; left: 0; right: 0;
                background: #fff; flex-direction: column; padding: 24px;
                border-bottom: 1px solid var(--border); gap: 18px;
                box-shadow: 0 12px 32px rgba(0,0,0,0.08);
            }
            .nav-links.open { display: flex; }
            .nav-toggle { display: block; }
            .page-banner { padding: 70px 0 90px; }
            .page-banner h1 { font-size: 30px; }
            .page-banner p { font-size: 16px; }
            .section { padding: 60px 0; }
            .section-header h2 { font-size: 26px; }
            .section-header p { font-size: 15px; }
            .cta-section { padding: 36px 24px; }
            .cta-section h2 { font-size: 24px; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .nav-wrap { height: 60px; }
            .logo { font-size: 17px; }
            .nav-links { top: 60px; }
            .page-banner { padding: 56px 0 72px; }
            .page-banner h1 { font-size: 24px; }
            .page-banner p { font-size: 15px; }
            .banner-meta { flex-direction: column; gap: 10px; }
            .section { padding: 48px 0; }
            .section-header { margin-bottom: 36px; }
            .section-header h2 { font-size: 22px; }
            .feature-card { padding: 24px; }
            .compare-table th, .compare-table td { padding: 12px 14px; font-size: 13px; }
            .cta-section { padding: 28px 20px; border-radius: 16px; }
            .cta-section h2 { font-size: 20px; }
            .faq-item { padding: 20px; }
        }

/* roulang page: article */
:root {
            --primary: #2563eb;
            --primary-deep: #1e3a5f;
            --accent: #f59e0b;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --text-main: #0f172a;
            --text-body: #334155;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --shadow: 0 1px 3px rgba(15, 23, 42, 0.06), 0 8px 30px rgba(15, 23, 42, 0.05);
            --shadow-lg: 0 4px 12px rgba(15, 23, 42, 0.10), 0 16px 40px rgba(15, 23, 42, 0.08);
            --space-section: 72px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            background: var(--bg-body);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }

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

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-narrow {
            max-width: 980px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .logo-dot {
            width: 12px;
            height: 12px;
            border-radius: 4px;
            background: linear-gradient(135deg, var(--accent), #f97316);
            flex-shrink: 0;
            box-shadow: 0 2px 6px rgba(245, 158, 11, .4);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-links a {
            padding: 8px 14px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-body);
            border-radius: 8px;
            position: relative;
            white-space: nowrap;
            transition: color .2s ease, background .2s ease;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: rgba(37, 99, 235, 0.06);
        }

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

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

        .nav-links .nav-cta {
            margin-left: 12px;
            padding: 8px 20px;
            border-radius: 999px;
            background: linear-gradient(135deg, var(--accent), #f97316);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(245, 158, 11, .3);
            transition: transform .2s ease, box-shadow .2s ease;
        }

        .nav-links .nav-cta:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(245, 158, 11, .4);
            color: #fff;
            background: linear-gradient(135deg, #f59e0b, #ea580c);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border);
            border-radius: 8px;
            width: 40px;
            height: 40px;
            font-size: 1.2rem;
            color: var(--text-main);
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: background .2s ease;
        }

        .nav-toggle:hover {
            background: rgba(0, 0, 0, 0.04);
        }

        /* ===== Article Banner ===== */
        .article-banner {
            position: relative;
            padding: 88px 0 72px;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.94), rgba(30, 58, 95, 0.88)),
                url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
        }

        .article-banner.inner-banner {
            padding: 64px 0 48px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            transition: color .2s ease;
        }

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

        .breadcrumb i {
            font-size: 0.7rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .article-banner h1 {
            font-size: clamp(1.8rem, 4vw, 2.75rem);
            font-weight: 800;
            line-height: 1.3;
            max-width: 860px;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 8px;
        }

        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.75);
            background: rgba(255, 255, 255, 0.12);
            padding: 6px 14px;
            border-radius: 999px;
        }

        .meta-item i {
            font-size: 0.8rem;
            color: var(--accent);
        }

        /* ===== Main Layout ===== */
        .main-wrap {
            padding: 60px 0 80px;
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 360px;
            gap: 48px;
        }

        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            padding: 40px;
        }

        .article-content {
            font-size: 1.02rem;
            line-height: 1.9;
            color: var(--text-body);
        }

        .article-content p {
            margin-bottom: 1.5rem;
        }

        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 2.2rem 0 1rem;
            line-height: 1.4;
        }

        .article-content h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-main);
            margin: 1.8rem 0 0.8rem;
        }

        .article-content ul,
        .article-content ol {
            margin: 1rem 0 1.5rem 1.4rem;
        }

        .article-content li {
            margin-bottom: 0.6rem;
        }

        .article-content ul li::marker {
            color: var(--accent);
        }

        .article-content ol li::marker {
            color: var(--primary);
            font-weight: 600;
        }

        .article-content blockquote {
            border-left: 4px solid var(--accent);
            background: #fffbeb;
            padding: 16px 20px;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
            color: #92400e;
            font-style: normal;
        }

        .article-content img {
            border-radius: 12px;
            margin: 1.5rem 0;
            box-shadow: var(--shadow);
        }

        .article-content a {
            color: var(--primary);
            font-weight: 500;
            border-bottom: 1px solid rgba(37, 99, 235, 0.3);
        }

        .article-content a:hover {
            border-bottom-color: var(--primary);
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            background: #f1f5f9;
            border-radius: 999px;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--text-body);
            transition: background .2s ease, color .2s ease;
        }

        .tag:hover {
            background: #e0e7ff;
            color: var(--primary);
        }

        .share-row {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 28px;
            flex-wrap: wrap;
        }

        .share-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        .share-btn {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #f1f5f9;
            color: var(--text-body);
            font-size: 0.9rem;
            transition: background .2s ease, color .2s ease, transform .2s ease;
        }

        .share-btn:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Sidebar ===== */
        .sidebar-widget {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            padding: 24px;
            margin-bottom: 24px;
        }

        .sidebar-widget .widget-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .widget-title .title-bar {
            width: 4px;
            height: 18px;
            border-radius: 4px;
            background: linear-gradient(135deg, var(--accent), #f97316);
        }

        .widget-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .widget-list li {
            border-bottom: 1px dashed #eef2f7;
            padding: 10px 0;
        }

        .widget-list li:last-child {
            border-bottom: none;
        }

        .widget-list li a {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--text-body);
            font-size: 0.92rem;
            line-height: 1.5;
            transition: color .2s ease;
        }

        .widget-list li a:hover {
            color: var(--primary);
        }

        .widget-list li a i {
            color: var(--accent);
            font-size: 0.8rem;
            margin-top: 4px;
            flex-shrink: 0;
        }

        .widget-list .post-date {
            display: block;
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-top: 2px;
        }

        .widget-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 12px;
            border-radius: 10px;
            color: var(--text-body);
            font-size: 0.92rem;
            margin-bottom: 4px;
            transition: background .2s ease, color .2s ease;
        }

        .widget-nav a:hover {
            background: #f1f5f9;
            color: var(--primary);
        }

        .widget-nav a i {
            width: 30px;
            height: 30px;
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #eef2ff;
            color: var(--primary);
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        .widget-contact {
            background: linear-gradient(135deg, var(--primary-deep), #1d4ed8);
            color: #fff;
            text-align: center;
            padding: 32px 24px;
        }

        .widget-contact h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .widget-contact p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 18px;
        }

        .widget-contact .btn-light {
            display: inline-block;
            padding: 8px 24px;
            border-radius: 999px;
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            font-size: 0.88rem;
            transition: transform .2s ease, box-shadow .2s ease;
        }

        .widget-contact .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(245, 158, 11, 0.4);
        }

        /* ===== Section Common ===== */
        .section-block {
            padding: var(--space-section) 0;
        }

        .section-header {
            margin-bottom: 40px;
        }

        .section-header .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #eef2ff;
            color: var(--primary);
            font-weight: 600;
            font-size: 0.8rem;
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .section-header h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.3;
            letter-spacing: -0.01em;
            margin-bottom: 12px;
        }

        .section-header p {
            color: var(--text-muted);
            max-width: 680px;
            font-size: 1rem;
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: transform .3s ease, box-shadow .3s ease;
        }

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

        .card-img {
            position: relative;
            aspect-ratio: 16/10;
            overflow: hidden;
            background: #eef2f7;
        }

        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

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

        .card-img .badge {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
        }

        .card-body {
            padding: 22px 22px 24px;
        }

        .card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.5;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-body p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--primary);
            transition: gap .2s ease;
        }

        .card-link:hover {
            gap: 10px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.9rem;
            border: 1px solid transparent;
            cursor: pointer;
            transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent), #f97316);
            color: #fff;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.4);
            color: #fff;
        }

        .btn-outline {
            border-color: var(--border);
            color: var(--text-main);
            background: transparent;
            box-shadow: none;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
            background: rgba(37, 99, 235, 0.04);
        }

        .btn-white {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
        }

        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
            color: var(--primary);
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 14px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color .2s ease, box-shadow .2s ease;
        }

        .faq-item:hover {
            border-color: #c7d2fe;
            box-shadow: 0 4px 20px rgba(37, 99, 235, 0.06);
        }

        .faq-item summary {
            padding: 20px 24px;
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            user-select: none;
        }

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

        .faq-item summary::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 0.75rem;
            color: var(--text-muted);
            transition: transform .3s ease;
            flex-shrink: 0;
        }

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

        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.8;
            border-top: 1px solid var(--border);
            margin-top: 0;
            padding-top: 16px;
        }

        .faq-answer p {
            margin-bottom: 0.8rem;
        }

        .faq-answer a {
            color: var(--primary);
            font-weight: 500;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.96), rgba(30, 58, 95, 0.9)),
                url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            padding: 72px 0;
            color: #fff;
            text-align: center;
            position: relative;
        }

        .cta-section h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1rem;
            max-width: 560px;
            margin: 0 auto 32px;
        }

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

        /* ===== Footer ===== */
        .site-footer {
            background: #0b1120;
            color: #94a3b8;
            padding-top: 64px;
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .footer-brand .logo {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 14px;
        }

        .footer-brand p {
            color: #94a3b8;
            line-height: 1.8;
            margin-top: 10px;
            max-width: 360px;
            font-size: 0.88rem;
        }

        .footer-col h4 {
            color: #f1f5f9;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }

        .footer-col a {
            display: block;
            padding: 5px 0;
            color: #94a3b8;
            font-size: 0.88rem;
            transition: color .2s ease, padding-left .2s ease;
        }

        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 22px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            color: #64748b;
            font-size: 0.8rem;
        }

        /* ===== Not Found ===== */
        .not-found {
            text-align: center;
            padding: 80px 20px;
        }

        .not-found .icon-circle {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: #eef2ff;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin-bottom: 24px;
        }

        .not-found h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
        }

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

        /* ===== Utility ===== */
        .grayscale-img {
            filter: grayscale(0.1);
        }

        .rounded-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
        }

        .bg-soft-blue {
            background: #eef2ff;
        }

        .bg-soft-amber {
            background: #fffbeb;
        }

        .bg-soft-green {
            background: #ecfdf5;
        }

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

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }

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

        @media (max-width: 768px) {
            :root {
                --space-section: 56px;
            }

            .header-inner {
                height: 64px;
            }

            .nav-links {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 16px;
                gap: 6px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 16px 32px rgba(0, 0, 0, 0.06);
                max-height: calc(100vh - 64px);
                overflow-y: auto;
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: transform .3s ease, opacity .3s ease;
            }

            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .nav-links a {
                padding: 12px 16px;
                border-radius: 10px;
                font-size: 1rem;
            }

            .nav-links a.active::after {
                display: none;
            }

            .nav-links a.active {
                background: #eef2ff;
            }

            .nav-links .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
            }

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

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

            .article-card {
                padding: 24px;
            }

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

            .cta-buttons .btn {
                width: 100%;
            }

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

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

            .article-banner {
                padding: 56px 0 44px;
            }

            .article-banner h1 {
                font-size: 1.5rem;
            }

            .article-meta {
                gap: 10px;
            }

            .meta-item {
                padding: 4px 10px;
                font-size: 0.78rem;
            }

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

            .section-header h2 {
                font-size: 1.4rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #4f46e5;
            --primary-light: #6366f1;
            --primary-dark: #4338ca;
            --accent: #f59e0b;
            --bg: #f8fafc;
            --bg-deep: #0f172a;
            --bg-card: #ffffff;
            --text-main: #0f172a;
            --text-body: #334155;
            --text-weak: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 10px 40px rgba(15, 23, 42, 0.08);
            --shadow-hover: 0 20px 50px rgba(15, 23, 42, 0.14);
            --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            background: var(--bg);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            display: block;
            height: auto;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }
        .site-header .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
            gap: 24px;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--text-main);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }
        .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: inline-block;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-links a {
            font-size: 0.95rem;
            color: var(--text-body);
            font-weight: 500;
            position: relative;
            padding: 6px 2px;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0%;
            height: 2px;
            background: var(--primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-links a:hover {
            color: var(--primary);
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-links a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links a.active::after {
            width: 100%;
        }
        .nav-links .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #fff;
            padding: 10px 22px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.9rem;
            box-shadow: 0 4px 16px rgba(79, 70, 229, 0.3);
            transition: var(--transition);
        }
        .nav-links .nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.35);
        }
        .nav-links .nav-cta::after {
            display: none;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
        }
        .hamburger span {
            width: 24px;
            height: 2px;
            background: var(--text-main);
            border-radius: 4px;
            transition: var(--transition);
        }
        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: 76px;
                right: -100%;
                width: 260px;
                height: calc(100vh - 76px);
                background: #fff;
                flex-direction: column;
                padding: 40px 32px;
                gap: 20px;
                box-shadow: var(--shadow);
                transition: right 0.45s cubic-bezier(0.4, 0, 0.2, 1);
                border-left: 1px solid var(--border);
            }
            .nav-links.open {
                right: 0;
            }
            .nav-links a {
                font-size: 1.05rem;
            }
        }
        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.5);
            backdrop-filter: blur(4px);
            z-index: 49;
            transition: opacity 0.3s;
        }
        .mobile-overlay.open {
            display: block;
        }
        /* ===== Hero ===== */
        .cat-hero {
            position: relative;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 45%, #334155 100%);
            padding: 110px 0 90px;
            overflow: hidden;
        }
        .cat-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.22;
            z-index: 0;
        }
        .cat-hero::after {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(79, 70, 229, 0.5), transparent 70%);
            z-index: 0;
        }
        .cat-hero .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 760px;
            margin: 0 auto;
        }
        .cat-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(8px);
            padding: 8px 20px;
            border-radius: 999px;
            color: #e2e8f0;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: 22px;
        }
        .cat-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 18px;
        }
        .cat-hero h1 .gradient-text {
            background: linear-gradient(120deg, #a5b4fc, #fbbf24);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .cat-hero p {
            font-size: 1.1rem;
            color: #cbd5e1;
            line-height: 1.7;
            margin-bottom: 32px;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 36px;
            flex-wrap: wrap;
        }
        .hero-stats .stat {
            text-align: center;
        }
        .hero-stats .stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            display: block;
            line-height: 1.1;
        }
        .hero-stats .stat-label {
            font-size: 0.85rem;
            color: #94a3b8;
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .cat-hero {
                padding: 80px 0 60px;
            }
            .cat-hero h1 {
                font-size: 2.2rem;
            }
            .cat-hero p {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stats .stat-num {
                font-size: 1.5rem;
            }
        }
        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 28px 0 0;
            font-size: 0.88rem;
            color: var(--text-weak);
        }
        .breadcrumb a {
            color: var(--text-weak);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            margin: 0 10px;
            color: #cbd5e1;
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 500;
        }
        /* ===== Section spacing ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: #f1f5f9;
        }
        .section-head {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 56px;
        }
        .section-head .eyebrow {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            background: rgba(79, 70, 229, 0.08);
            border: 1px solid rgba(79, 70, 229, 0.15);
            padding: 5px 16px;
            border-radius: 999px;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 14px;
        }
        .section-head h2 {
            font-size: 2.4rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-main);
            margin-bottom: 14px;
            line-height: 1.25;
        }
        .section-head p {
            font-size: 1rem;
            color: var(--text-body);
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .section {
                padding: 60px 0;
            }
            .section-head {
                margin-bottom: 40px;
            }
            .section-head h2 {
                font-size: 1.8rem;
            }
        }
        /* ===== Cards ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 36px 30px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            transform: scaleX(0);
            transform-origin: left;
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(79, 70, 229, 0.2);
        }
        .feature-card:hover::before {
            transform: scaleX(1);
        }
        .feature-card .icon-wrap {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(79, 70, 229, 0.08);
            color: var(--primary);
            font-size: 1.4rem;
            margin-bottom: 20px;
            transition: var(--transition);
        }
        .feature-card:hover .icon-wrap {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }
        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 0.92rem;
            color: var(--text-body);
            line-height: 1.7;
        }
        @media (max-width: 992px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 580px) {
            .card-grid {
                grid-template-columns: 1fr;
            }
        }
        /* ===== Steps ===== */
        .steps-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            position: relative;
            padding: 0 10px;
        }
        .step-item .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            margin: 0 auto 18px;
            position: relative;
            z-index: 2;
            box-shadow: 0 6px 20px rgba(79, 70, 229, 0.3);
        }
        .step-item::after {
            content: '';
            position: absolute;
            top: 22px;
            left: calc(50% + 30px);
            width: calc(100% - 60px);
            height: 2px;
            background: var(--border);
            z-index: 1;
        }
        .step-item:last-child::after {
            display: none;
        }
        .step-item h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.88rem;
            color: var(--text-weak);
            line-height: 1.6;
        }
        @media (max-width: 992px) {
            .steps-wrap {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px 20px;
            }
            .step-item::after {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .steps-wrap {
                grid-template-columns: 1fr;
            }
        }
        /* ===== Article / List items ===== */
        .content-list {
            display: grid;
            gap: 20px;
        }
        .content-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 26px 30px;
            display: flex;
            align-items: center;
            gap: 20px;
            transition: var(--transition);
        }
        .content-item:hover {
            border-color: rgba(79, 70, 229, 0.25);
            box-shadow: var(--shadow);
            transform: translateX(4px);
        }
        .content-item .item-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(79, 70, 229, 0.06);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .content-item .item-text {
            flex: 1;
        }
        .content-item .item-text h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 4px;
        }
        .content-item .item-text p {
            font-size: 0.86rem;
            color: var(--text-weak);
        }
        .content-item .item-more {
            color: var(--primary);
            font-size: 0.9rem;
            font-weight: 600;
            white-space: nowrap;
        }
        .content-item .item-more i {
            margin-left: 6px;
            transition: transform 0.3s;
        }
        .content-item:hover .item-more i {
            transform: translateX(4px);
        }
        @media (max-width: 640px) {
            .content-item {
                flex-direction: column;
                align-items: flex-start;
                padding: 22px;
            }
            .content-item .item-more {
                align-self: flex-end;
            }
        }
        /* ===== FAQ ===== */
        .faq-grid {
            max-width: 880px;
            margin: 0 auto;
            display: grid;
            gap: 14px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 0;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(79, 70, 229, 0.25);
            box-shadow: var(--shadow);
        }
        .faq-item .faq-q {
            padding: 22px 28px;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-family: inherit;
        }
        .faq-item .faq-q .q-icon {
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: rgba(79, 70, 229, 0.1);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            transition: transform 0.4s ease;
            flex-shrink: 0;
        }
        .faq-item.open .faq-q .q-icon {
            transform: rotate(45deg);
        }
        .faq-item .faq-a {
            max-height: 0;
            overflow: hidden;
            padding: 0 28px;
            transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
        }
        .faq-item.open .faq-a {
            max-height: 400px;
            padding: 0 28px 24px;
        }
        .faq-item .faq-a p {
            font-size: 0.92rem;
            color: var(--text-body);
            line-height: 1.8;
            padding-top: 4px;
        }
        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 60%, #334155 100%);
            border-radius: 24px;
            padding: 64px 60px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(79, 70, 229, 0.5), transparent 70%);
        }
        .cta-block::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -40px;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.3), transparent 70%);
        }
        .cta-block h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            position: relative;
            z-index: 2;
        }
        .cta-block p {
            color: #94a3b8;
            font-size: 1rem;
            margin-bottom: 28px;
            position: relative;
            z-index: 2;
        }
        .cta-block .btn-light {
            display: inline-block;
            background: linear-gradient(135deg, #fbbf24, #f59e0b);
            color: #0f172a;
            font-weight: 700;
            padding: 14px 40px;
            border-radius: 999px;
            font-size: 1rem;
            position: relative;
            z-index: 2;
            transition: var(--transition);
            box-shadow: 0 8px 32px rgba(245, 158, 11, 0.3);
        }
        .cta-block .btn-light:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(245, 158, 11, 0.4);
        }
        @media (max-width: 768px) {
            .cta-block {
                padding: 48px 28px;
                border-radius: 18px;
            }
            .cta-block h2 {
                font-size: 1.6rem;
            }
            .cta-block p {
                font-size: 0.9rem;
            }
            .cta-block .btn-light {
                padding: 12px 30px;
                font-size: 0.9rem;
                display: block;
            }
        }
        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            color: #94a3b8;
            padding: 70px 0 0;
            margin-top: 0;
        }
        .site-footer .container {
            max-width: 1200px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1.2fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(148, 163, 184, 0.12);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.8;
            color: #64748b;
            max-width: 320px;
            margin-top: 14px;
        }
        .footer-col h4 {
            color: #e2e8f0;
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 18px;
            text-transform: uppercase;
            letter-spacing: 0.06em;
        }
        .footer-col a {
            display: block;
            color: #64748b;
            font-size: 0.88rem;
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: #fbbf24;
            padding-left: 6px;
        }
        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            font-size: 0.82rem;
            color: #334155;
            border-top: 1px solid rgba(148, 163, 184, 0.08);
            margin-top: 48px;
        }
        .footer-bottom p {
            color: #475569;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        /* ===== Cover card ===== */
        .cover-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .cover-card {
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .cover-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
        }
        .cover-card .cover-img {
            position: relative;
            height: 200px;
            overflow: hidden;
        }
        .cover-card .cover-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .cover-card:hover .cover-img img {
            transform: scale(1.05);
        }
        .cover-card .cover-img::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 40%;
            background: linear-gradient(to top, rgba(15, 23, 42, 0.4), transparent);
        }
        .cover-card .cover-body {
            padding: 24px;
        }
        .cover-card .cover-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            background: rgba(79, 70, 229, 0.08);
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 12px;
        }
        .cover-card .cover-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .cover-card .cover-body p {
            font-size: 0.88rem;
            color: var(--text-weak);
            line-height: 1.6;
        }
        @media (max-width: 992px) {
            .cover-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 580px) {
            .cover-grid {
                grid-template-columns: 1fr;
            }
        }
        /* ===== Split block ===== */
        .split-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 24px;
            padding: 48px;
            margin-bottom: 40px;
            transition: var(--transition);
        }
        .split-block:hover {
            box-shadow: var(--shadow);
        }
        .split-block .text-side .eyebrow {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--primary);
            background: rgba(79, 70, 229, 0.08);
            border-radius: 999px;
            padding: 4px 14px;
            margin-bottom: 14px;
            letter-spacing: 0.06em;
        }
        .split-block .text-side h3 {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.35;
            margin-bottom: 12px;
        }
        .split-block .text-side p {
            font-size: 0.95rem;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .split-block .text-side ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .split-block .text-side ul li {
            padding: 8px 0;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.92rem;
            color: var(--text-main);
        }
        .split-block .text-side ul li i {
            color: var(--primary);
            font-size: 0.8rem;
        }
        .split-block .img-side {
            border-radius: 18px;
            overflow: hidden;
            height: 300px;
            position: relative;
        }
        .split-block .img-side img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        @media (max-width: 992px) {
            .split-block {
                grid-template-columns: 1fr;
                gap: 32px;
                padding: 32px;
            }
            .split-block .img-side {
                order: -1;
                height: 220px;
            }
        }
        @media (max-width: 520px) {
            .split-block {
                padding: 24px;
                border-radius: 18px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --primary-light: #a5b4fc;
            --accent: #06b6d4;
            --darkbg: #0b1024;
            --softbg: #f4f6fc;
            --lineup: #e2e8f0;
            --ink: #0f172a;
            --sub: #64748b;
            --radius: 1rem;
            --shadow: 0 4px 20px rgba(2, 6, 23, 0.06);
            --shadow-hover: 0 16px 40px rgba(2, 6, 23, 0.12);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            background: #ffffff;
            color: var(--ink);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color .3s ease;
        }

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

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: var(--ink);
        }

        .logo-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: inline-block;
            box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
        }

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

        .nav-links a {
            padding: 8px 16px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--sub);
            border-radius: 999px;
            transition: all .3s ease;
            position: relative;
        }

        .nav-links a:not(.nav-cta)::after {
            content: "";
            position: absolute;
            left: 50%;
            bottom: 2px;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            transition: transform .3s ease;
        }

        .nav-links a:not(.nav-cta):hover::after,
        .nav-links a.active::after {
            transform: translateX(-50%) scaleX(1);
        }

        .nav-links a:not(.nav-cta):hover,
        .nav-links a.active {
            color: var(--ink);
        }

        .nav-links .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
            transition: all .3s ease;
        }

        .nav-links .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(99, 102, 241, 0.45);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px;
        }

        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--ink);
            border-radius: 2px;
            transition: all .3s ease;
        }

        .hero-banner {
            position: relative;
            background: linear-gradient(135deg, var(--darkbg) 0%, #1e1b4b 50%, #0f172a 100%);
            padding: 80px 0 72px;
            overflow: hidden;
        }

        .hero-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.22;
            z-index: 0;
        }

        .hero-banner::after {
            content: "";
            position: absolute;
            top: -120px;
            right: -80px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(99, 102, 241, 0.35), transparent 70%);
            z-index: 1;
        }

        .hero-banner .container {
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(8px);
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 0.85rem;
            color: #c7d2fe;
            font-weight: 500;
        }

        .hero-title {
            font-size: clamp(2.2rem, 5vw, 3.5rem);
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-top: 20px;
            margin-bottom: 16px;
        }

        .hero-title span {
            background: linear-gradient(90deg, #a5b4fc, #67e8f9);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .hero-desc {
            max-width: 640px;
            color: #94a3b8;
            font-size: 1.1rem;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 28px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 14px 28px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
            transition: all .3s ease;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(99, 102, 241, 0.45);
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #e2e8f0;
            padding: 14px 28px;
            border-radius: 999px;
            font-weight: 500;
            font-size: 0.95rem;
            transition: all .3s ease;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: rgba(255, 255, 255, 0.4);
        }

        .section {
            padding: 88px 0;
        }

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

        .section-head {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            background: rgba(99, 102, 241, 0.08);
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 14px;
            letter-spacing: 0.04em;
        }

        .section-title {
            font-size: clamp(1.8rem, 3.5vw, 2.4rem);
            font-weight: 800;
            line-height: 1.3;
            color: var(--ink);
            margin-bottom: 12px;
        }

        .section-sub {
            color: var(--sub);
            font-size: 1rem;
            line-height: 1.8;
        }

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

        .safety-card {
            background: #fff;
            border: 1px solid var(--lineup);
            border-radius: var(--radius);
            padding: 32px;
            box-shadow: var(--shadow);
            transition: all .35s ease;
        }

        .safety-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(99, 102, 241, 0.3);
        }

        .safety-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 20px;
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(6, 182, 212, 0.1));
            color: var(--primary);
        }

        .safety-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--ink);
        }

        .safety-card p {
            color: var(--sub);
            font-size: 0.92rem;
            line-height: 1.7;
        }

        .guide-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .guide-image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
        }

        .guide-image img {
            width: 100%;
            height: 360px;
            object-fit: cover;
        }

        .guide-content h3 {
            font-size: 1.6rem;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .guide-content p {
            color: var(--sub);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .check-list {
            list-style: none;
            margin-top: 20px;
        }

        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 8px 0;
            color: #334155;
            font-weight: 500;
            font-size: 0.95rem;
        }

        .check-list li::before {
            content: "✓";
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: rgba(99, 102, 241, 0.12);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            font-weight: 700;
            margin-top: 2px;
        }

        .steps-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 24px;
        }

        .step-card {
            text-align: center;
            padding: 36px 20px 28px;
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--lineup);
            position: relative;
            box-shadow: var(--shadow);
            transition: all .35s ease;
        }

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

        .step-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            box-shadow: 0 6px 16px rgba(99, 102, 241, 0.3);
        }

        .step-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .step-card p {
            color: var(--sub);
            font-size: 0.88rem;
            line-height: 1.6;
        }

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

        .tool-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--lineup);
            box-shadow: var(--shadow);
            transition: all .35s ease;
        }

        .tool-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }

        .tool-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .tool-body {
            padding: 24px;
        }

        .tool-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent);
            background: rgba(6, 182, 212, 0.08);
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 10px;
        }

        .tool-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .tool-body p {
            color: var(--sub);
            font-size: 0.88rem;
            line-height: 1.65;
        }

        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--lineup);
            border-radius: 14px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color .3s ease;
        }

        .faq-item summary {
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background: #fff;
            transition: background .3s ease;
        }

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

        .faq-item summary::after {
            content: "+";
            font-size: 1.5rem;
            font-weight: 400;
            color: var(--primary);
            transition: transform .3s ease;
            flex-shrink: 0;
        }

        .faq-item[open] summary::after {
            transform: rotate(45deg);
        }

        .faq-item[open] summary {
            background: rgba(99, 102, 241, 0.02);
        }

        .faq-item .faq-body {
            padding: 0 24px 20px;
            color: var(--sub);
            font-size: 0.93rem;
            line-height: 1.75;
            border-top: 1px solid rgba(226, 232, 240, 0.6);
            padding-top: 16px;
        }

        .cta-section {
            background: linear-gradient(135deg, var(--darkbg), #1e1b4b);
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.15;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .cta-title {
            font-size: clamp(1.8rem, 3vw, 2.4rem);
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }

        .cta-desc {
            color: #94a3b8;
            max-width: 560px;
            margin: 0 auto 28px;
            font-size: 1rem;
            line-height: 1.8;
        }

        .site-footer {
            background: #fff;
            border-top: 1px solid var(--lineup);
            padding: 64px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
        }

        .footer-brand .logo {
            font-size: 1.15rem;
            padding-bottom: 14px;
        }

        .footer-brand p {
            color: var(--sub);
            font-size: 0.9rem;
            line-height: 1.75;
            margin-top: 8px;
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--ink);
        }

        .footer-col a {
            display: block;
            color: var(--sub);
            font-size: 0.9rem;
            padding: 6px 0;
            transition: color .3s ease;
        }

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

        .footer-bottom {
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom p {
            color: var(--sub);
            font-size: 0.85rem;
        }

        @media (max-width: 1024px) {
            .safety-grid,
            .tools-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-wrap {
                grid-template-columns: repeat(2, 1fr);
            }
            .guide-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-links {
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 24px 24px;
                border-bottom: 1px solid var(--lineup);
                gap: 8px;
                display: none;
                box-shadow: 0 20px 40px rgba(2, 6, 23, 0.08);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 10px 8px;
                width: 100%;
                font-size: 1rem;
            }
            .nav-links .nav-cta {
                margin-top: 8px;
                text-align: center;
                width: 100%;
            }
            .hero-banner {
                padding: 56px 0 48px;
            }
            .safety-grid,
            .tools-grid {
                grid-template-columns: 1fr;
            }
            .steps-wrap {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .section {
                padding: 64px 0;
            }
            .guide-image img {
                height: 260px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 18px;
            }
            .hero-title {
                font-size: 1.9rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline-light {
                justify-content: center;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .safety-card,
            .tool-body .card-pad {
                padding: 24px;
            }
        }