/* roulang page: index */
:root{--bg:#0b0f19;--surface:#121926;--elevated:#182233;--border:#223046;--text:#e6edf3;--muted:#8b9db3;--soft:#b9c8da;--brand:#e0b35a;--brand-dark:#c89a3e;--accent:#4ec9e1;--radius:18px;--radius-sm:12px;--shadow:0 20px 40px rgba(0,0,0,.45);--shadow-sm:0 8px 20px rgba(0,0,0,.25);--transition:.25s ease;--font:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,'PingFang SC','Microsoft YaHei',sans-serif}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-head{max-width:720px;margin:0 auto 56px;text-align:center}
.section-tag{display:inline-block;font-size:13px;letter-spacing:.12em;color:var(--brand);background:rgba(224,179,90,.12);border:1px solid rgba(224,179,90,.25);padding:6px 14px;border-radius:999px;text-transform:uppercase;margin-bottom:16px}
.section-title{font-size:42px;line-height:1.25;font-weight:700;letter-spacing:-.02em;color:#fff;margin-bottom:16px}
.section-desc{font-size:17px;color:var(--muted)}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.badge{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;padding:7px 14px;border-radius:999px}
.badge-gold{background:rgba(224,179,90,.14);color:var(--brand);border:1px solid rgba(224,179,90,.3)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;font-size:15px;font-weight:600;padding:14px 28px;border-radius:999px;transition:all var(--transition);border:1px solid transparent}
.btn-primary{background:var(--brand);color:#10131c;box-shadow:0 10px 28px rgba(224,179,90,.25)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 14px 32px rgba(224,179,90,.35)}
.btn-secondary{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.16);backdrop-filter:blur(8px)}
.btn-secondary:hover{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.28);transform:translateY(-2px)}
.btn-outline{border-color:var(--brand);color:var(--brand);background:transparent}
.btn-outline:hover{background:var(--brand);color:#10131c;transform:translateY(-2px)}
.site-header{position:sticky;top:0;z-index:100;background:rgba(11,15,25,.82);backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.08)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:76px}
.brand{display:flex;align-items:center;gap:4px;font-size:26px;font-weight:800;letter-spacing:-.02em}
.brand-logo{color:var(--brand)}
.brand-sub{color:#fff;font-weight:700}
.desktop-nav{display:flex;align-items:center;gap:40px}
.nav-link{position:relative;font-size:15px;font-weight:500;color:var(--soft);padding:8px 2px;transition:color var(--transition)}
.nav-link:hover{color:#fff}
.nav-link.active{color:#fff}
.nav-link.active::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:2px;background:var(--brand);border-radius:2px}
.mobile-menu-btn{display:none;width:42px;height:42px;border:1px solid rgba(255,255,255,.14);background:transparent;border-radius:10px;color:#fff;font-size:18px;align-items:center;justify-content:center}
.mobile-menu{display:none;background:var(--surface);border-top:1px solid rgba(255,255,255,.08);padding:16px 24px}
.mobile-menu a{display:block;padding:12px 0;color:var(--soft);border-bottom:1px solid rgba(255,255,255,.05)}
.mobile-menu a:last-child{border-bottom:none}
.hero-section{position:relative;min-height:88vh;display:flex;align-items:center;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(110deg,rgba(11,15,25,.96) 25%,rgba(11,15,25,.72) 55%,rgba(11,15,25,.35))}
.hero-content{position:relative;z-index:2;max-width:760px;padding:120px 0}
.hero-badge{margin-bottom:24px}
.hero-title{font-size:66px;line-height:1.12;font-weight:800;letter-spacing:-.03em;color:#fff;margin-bottom:24px}
.hero-desc{font-size:19px;color:var(--soft);max-width:600px;margin-bottom:40px}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px}
.feature-card{background:var(--surface);border:1px solid rgba(255,255,255,.07);border-radius:var(--radius);padding:32px 28px;transition:all var(--transition)}
.feature-card:hover{transform:translateY(-6px);border-color:rgba(224,179,90,.35);box-shadow:var(--shadow)}
.feature-icon{width:56px;height:56px;border-radius:14px;background:rgba(224,179,90,.14);display:flex;align-items:center;justify-content:center;font-size:24px;color:var(--brand);margin-bottom:22px}
.feature-card h3{font-size:20px;color:#fff;margin-bottom:12px;font-weight:700}
.feature-card p{color:var(--muted);font-size:15px}
.category-card{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid rgba(255,255,255,.08);background:var(--surface);transition:all var(--transition);display:block}
.category-card:hover{transform:translateY(-6px);border-color:rgba(224,179,90,.4);box-shadow:var(--shadow)}
.category-card img{width:100%;height:190px;object-fit:cover;transition:transform .5s ease}
.category-card:hover img{transform:scale(1.06)}
.category-body{padding:26px 26px 30px}
.category-body h3{font-size:22px;color:#fff;margin-bottom:10px}
.category-body p{color:var(--muted);font-size:15px;margin-bottom:18px}
.link-more{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-weight:600;font-size:14px}
.news-section{background:var(--surface)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{display:block;background:var(--bg);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius-sm);padding:26px;transition:all var(--transition)}
.news-card:hover{transform:translateY(-4px);border-color:rgba(224,179,90,.35);box-shadow:var(--shadow-sm)}
.news-meta{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.tag{background:rgba(78,201,225,.12);color:var(--accent);font-size:12px;font-weight:600;padding:5px 12px;border-radius:999px}
.news-date{color:var(--muted);font-size:13px}
.news-title{color:#fff;font-size:18px;font-weight:700;line-height:1.45;margin-bottom:10px;transition:color var(--transition)}
.news-card:hover .news-title{color:var(--brand)}
.news-summary{color:var(--muted);font-size:14px;line-height:1.7}
.empty-tip{grid-column:1/-1;text-align:center;padding:50px;color:var(--muted);border:1px dashed rgba(255,255,255,.14);border-radius:var(--radius);font-size:16px}
.stats-section{background:#0d1420;border-top:1px solid rgba(255,255,255,.06);border-bottom:1px solid rgba(255,255,255,.06)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:72px 0}
.stat-item{text-align:center;padding:16px}
.stat-item strong{display:block;font-size:48px;font-weight:800;color:var(--brand);letter-spacing:-.03em;margin-bottom:6px}
.stat-item span{color:var(--muted);font-size:15px}
.process-step{position:relative;background:var(--surface);border:1px solid rgba(255,255,255,.07);border-radius:var(--radius);padding:36px 28px;transition:all var(--transition)}
.process-step:hover{transform:translateY(-6px);border-color:rgba(78,201,225,.35);box-shadow:var(--shadow)}
.step-num{font-size:48px;font-weight:800;color:rgba(224,179,90,.28);line-height:1;margin-bottom:18px}
.process-step h3{color:#fff;font-size:20px;margin-bottom:12px}
.process-step p{color:var(--muted);font-size:15px}
.faq-list{max-width:860px;margin:0 auto;display:grid;gap:14px}
.faq-item{background:var(--surface);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius-sm);overflow:hidden;transition:border-color var(--transition)}
.faq-item:hover{border-color:rgba(224,179,90,.3)}
.faq-item summary{padding:22px 26px;font-size:17px;font-weight:600;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:26px;color:var(--brand);transition:transform var(--transition)}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{padding:0 26px 24px;color:var(--muted);font-size:15px}
.cta-section{background:var(--brand);padding:80px 0;text-align:center}
.cta-section h2{color:#10131c;font-size:40px;font-weight:800;letter-spacing:-.02em;margin-bottom:16px}
.cta-section p{color:rgba(16,19,28,.75);font-size:18px;max-width:640px;margin:0 auto 32px}
.cta-actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
.cta-section .btn-primary{background:#10131c;color:#fff;box-shadow:0 10px 28px rgba(0,0,0,.25)}
.cta-section .btn-primary:hover{background:#1c2333}
.cta-section .btn-outline{border-color:#10131c;color:#10131c}
.cta-section .btn-outline:hover{background:#10131c;color:#fff}
.site-footer{background:#080c13;border-top:1px solid rgba(255,255,255,.06);padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px;padding-bottom:56px}
.footer-brand{font-size:24px;font-weight:800;color:#fff;margin-bottom:12px}
.footer-brand span{color:var(--brand)}
.footer-desc{color:var(--muted);font-size:15px;max-width:300px;line-height:1.8}
.footer-col h4{font-size:16px;color:#fff;font-weight:700;margin-bottom:18px}
.footer-col a{display:block;color:var(--muted);font-size:14px;padding:5px 0;transition:color var(--transition)}
.footer-col a:hover{color:var(--brand)}
.footer-col p{color:var(--muted);font-size:14px;line-height:1.8;padding:3px 0}
.footer-bottom{border-top:1px solid rgba(255,255,255,.06);padding:24px 0;text-align:center;color:var(--muted);font-size:14px}
.footer-bottom .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.page-banner{position:relative;padding:140px 0 90px;background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;border-bottom:1px solid rgba(255,255,255,.06)}
.page-banner-overlay{position:absolute;inset:0;background:linear-gradient(120deg,rgba(11,15,25,.95) 30%,rgba(11,15,25,.6))}
.page-banner-content{position:relative;z-index:2}
.breadcrumb{font-size:14px;color:var(--muted);margin-bottom:20px}
.breadcrumb a{color:var(--muted);transition:color var(--transition)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span{margin:0 8px;color:rgba(255,255,255,.3)}
.page-banner h1{font-size:52px;line-height:1.2;font-weight:800;color:#fff;letter-spacing:-.03em;margin-bottom:18px}
.page-banner p{font-size:18px;color:var(--soft);max-width:640px}
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.intro-media{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.intro-media img{width:100%;height:100%;object-fit:cover}
.intro-text h2{font-size:34px;color:#fff;line-height:1.3;margin-bottom:16px}
.intro-text p{color:var(--muted);font-size:16px;margin-bottom:16px}
.intro-features{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:24px}
.intro-features li{display:flex;align-items:center;gap:10px;color:var(--soft);font-size:15px}
.intro-features li i{color:var(--brand)}
.article-main{padding:80px 0}
.article-card{max-width:860px;margin:0 auto;background:var(--surface);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);padding:44px;box-shadow:var(--shadow-sm)}
.article-header{margin-bottom:32px;border-bottom:1px solid rgba(255,255,255,.08);padding-bottom:28px}
.article-header h1{font-size:40px;line-height:1.25;color:#fff;font-weight:800;letter-spacing:-.02em;margin-bottom:18px}
.article-meta{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.article-meta span{color:var(--muted);font-size:14px}
.article-cover{border-radius:var(--radius-sm);margin:0 0 28px;object-fit:cover}
.article-content{color:var(--soft);font-size:16px;line-height:1.9}
.article-content h2,.article-content h3{color:#fff;margin:24px 0 12px}
.article-content p{margin-bottom:18px}
.article-content ul,.article-content ol{padding-left:24px;margin-bottom:18px}
.not-found{max-width:700px;margin:0 auto;text-align:center;background:var(--surface);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);padding:80px 40px}
.not-found h2{font-size:36px;color:#fff;margin-bottom:14px}
.not-found p{color:var(--muted);margin-bottom:32px}
@media (max-width:1024px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}.news-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}.hero-title{font-size:52px}.section{padding:80px 0}}
@media (max-width:768px){.desktop-nav{display:none}.mobile-menu-btn{display:flex}.mobile-menu.open{display:block}.section-title{font-size:32px}.hero-title{font-size:42px}.hero-desc{font-size:17px}.grid-4,.grid-3,.news-grid,.stats-grid{grid-template-columns:1fr}.process-grid{grid-template-columns:1fr}.intro-grid{grid-template-columns:1fr;gap:32px}.footer-grid{grid-template-columns:1fr;gap:32px}.article-card{padding:28px}.article-header h1{font-size:30px}.page-banner h1{font-size:36px}.stats-grid{gap:8px;padding:48px 0}.stat-item strong{font-size:36px}.cta-section h2{font-size:32px}.cta-actions .btn{width:100%}}
@media (max-width:520px){.hero-section{min-height:75vh}.hero-title{font-size:34px}.section{padding:60px 0}.header-inner{height:64px}.footer-bottom .container{flex-direction:column;text-align:center}.article-main{padding:48px 0}}

/* roulang page: category1 */
:root {
            --color-primary: #0a6cf5;
            --color-primary-dark: #0a56d1;
            --color-primary-light: #d9edff;
            --color-accent: #ff9a1f;
            --color-bg: #fbfcfe;
            --color-surface: #ffffff;
            --color-text: #1a2332;
            --color-text-weak: #64748b;
            --color-border: #e2e8f0;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --shadow-soft: 0 4px 24px rgba(10, 108, 245, 0.08);
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.06);
            --spacing-section: 5rem;
        }

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

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

        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }

        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

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

        .section-sm {
            padding: 3rem 0;
        }

        .section-title {
            font-size: 2.25rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: 1rem;
        }

        .section-subtitle {
            font-size: 1.125rem;
            color: var(--color-text-weak);
            max-width: 640px;
            line-height: 1.7;
        }

        /* Site Header */
        .site-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            position: sticky;
            top: 0;
            z-index: 100;
            transition: box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
        }

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

        .brand {
            display: flex;
            align-items: center;
            gap: 0.35rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            font-size: 1.5rem;
            line-height: 1;
        }

        .brand-logo {
            color: var(--color-primary);
            background: linear-gradient(135deg, #0a6cf5 0%, #4a9aff 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .brand-sub {
            color: var(--color-text);
            font-weight: 800;
        }

        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 2rem;
        }

        .nav-link {
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--color-text-weak);
            padding: 0.3rem 0;
            position: relative;
            border-bottom: 2px solid transparent;
            transition: color 0.2s ease, border-color 0.2s ease;
        }

        .nav-link:hover {
            color: var(--color-text);
            border-bottom-color: var(--color-primary-light);
        }

        .nav-link.active {
            color: var(--color-primary);
            border-bottom-color: var(--color-primary);
            font-weight: 600;
        }

        .mobile-menu-btn {
            display: none;
            font-size: 1.25rem;
            color: var(--color-text);
            width: 40px;
            height: 40px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            transition: background 0.2s ease;
        }

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

        .mobile-menu {
            display: none;
            padding: 1rem 1.5rem 1.5rem;
            border-top: 1px solid var(--color-border);
            background: rgba(255, 255, 255, 0.98);
        }

        .mobile-menu a {
            display: block;
            padding: 0.75rem 0;
            font-size: 1rem;
            font-weight: 500;
            color: var(--color-text);
            border-bottom: 1px solid #f1f5f9;
        }

        .mobile-menu a:last-child {
            border-bottom: none;
        }

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

        /* Hero Banner */
        .category-hero {
            position: relative;
            padding: 5.5rem 0 4.5rem;
            background: linear-gradient(135deg, #0b101a 0%, #111827 50%, #14203a 100%);
            overflow: hidden;
            isolation: isolate;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.28;
            z-index: -1;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(11, 16, 26, 0.85) 0%, rgba(17, 24, 39, 0.55) 100%);
            z-index: -1;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(10, 108, 245, 0.15);
            border: 1px solid rgba(10, 108, 245, 0.4);
            color: #8eccff;
            font-size: 0.8125rem;
            font-weight: 600;
            padding: 0.35rem 1rem;
            border-radius: 999px;
            letter-spacing: 0.02em;
            margin-bottom: 1.5rem;
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.15;
            color: #ffffff;
            letter-spacing: -0.03em;
            margin-bottom: 1.25rem;
            max-width: 700px;
        }

        .hero-desc {
            font-size: 1.125rem;
            color: #cbd5e1;
            max-width: 580px;
            margin-bottom: 2rem;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            font-weight: 600;
            font-size: 0.9375rem;
            padding: 0.75rem 1.75rem;
            border-radius: 0.75rem;
            transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            border: 1px solid transparent;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--color-primary);
            color: #ffffff;
            box-shadow: 0 4px 16px rgba(10, 108, 245, 0.35);
        }

        .btn-primary:hover {
            background: var(--color-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(10, 108, 245, 0.45);
        }

        .btn-outline-light {
            border-color: rgba(255, 255, 255, 0.3);
            color: #ffffff;
            background: rgba(255, 255, 255, 0.05);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.5);
            transform: translateY(-2px);
        }

        .btn-accent {
            background: linear-gradient(135deg, #ff9a1f, #f07d04);
            color: #ffffff;
            box-shadow: 0 4px 16px rgba(255, 154, 31, 0.3);
        }

        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 154, 31, 0.4);
        }

        .btn:focus-visible,
        .nav-link:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 4px;
        }

        /* Cards */
        .card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            padding: 2rem;
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }

        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lift, 0 12px 32px rgba(0, 0, 0, 0.08));
        }

        .card-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            background: var(--color-primary-light);
            color: var(--color-primary);
        }

        .card-icon.accent {
            background: #fff4e6;
            color: var(--color-accent);
        }

        .card-icon.green {
            background: #ddf5e4;
            color: #16a34a;
        }

        .card-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            line-height: 1.4;
        }

        .card-text {
            color: var(--color-text-weak);
            font-size: 0.9375rem;
            line-height: 1.7;
        }

        /* Timeline */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
            padding: 1rem 0;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 24px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-accent) 100%);
        }

        .timeline-item {
            position: relative;
            padding-left: 68px;
            padding-bottom: 2.5rem;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-dot {
            position: absolute;
            left: 14px;
            top: 4px;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: #ffffff;
            border: 3px solid var(--color-primary);
            box-shadow: 0 0 0 4px rgba(10, 108, 245, 0.15);
        }

        .timeline-dot.accent {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 4px rgba(255, 154, 31, 0.15);
        }

        .timeline-content {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 1.5rem 1.75rem;
            transition: box-shadow 0.2s ease;
        }

        .timeline-content:hover {
            box-shadow: var(--shadow-soft);
        }

        .timeline-step {
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--color-primary);
            letter-spacing: 0.03em;
            margin-bottom: 0.35rem;
        }

        .timeline-title {
            font-size: 1.125rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .timeline-desc {
            color: var(--color-text-weak);
            font-size: 0.9375rem;
            line-height: 1.6;
        }

        /* Features Grid */
        .feature-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 1.75rem;
            transition: all 0.25s ease;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.3s ease;
        }

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

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

        .feature-icon {
            font-size: 1.75rem;
            color: var(--color-primary);
            margin-bottom: 1rem;
        }

        .feature-title {
            font-size: 1.0625rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .feature-desc {
            font-size: 0.906rem;
            color: var(--color-text-weak);
            line-height: 1.65;
        }

        /* Image Card List */
        .guide-card {
            background: var(--color-surface);
            border-radius: var(--radius-xl);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }

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

        .guide-image {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .guide-image-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(0, 0, 0, 0) 30%, rgba(11, 16, 26, 0.5) 100%);
        }

        .guide-tag {
            position: absolute;
            top: 1rem;
            left: 1rem;
            background: rgba(255, 255, 255, 0.92);
            color: var(--color-primary);
            font-size: 0.8125rem;
            font-weight: 600;
            padding: 0.25rem 0.75rem;
            border-radius: 999px;
            backdrop-filter: blur(4px);
        }

        .guide-body {
            padding: 1.5rem;
        }

        .guide-title {
            font-size: 1.125rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }

        .guide-meta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.8125rem;
            color: var(--color-text-weak);
            margin-top: 1rem;
        }

        .guide-meta i {
            font-size: 0.75rem;
        }

        /* Stats */
        .stats-section {
            background: linear-gradient(135deg, #0d2651, #111827);
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }

        .stats-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
        }

        .stat-item {
            position: relative;
            text-align: center;
            padding: 2rem 1rem;
        }

        .stat-number {
            font-size: 2.75rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            background: linear-gradient(135deg, #ffffff 60%, #8eccff 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 0.25rem;
        }

        .stat-label {
            color: #93c5fd;
            font-size: 0.9375rem;
            font-weight: 500;
        }

        /* Checklist */
        .checklist-item {
            display: flex;
            align-items: flex-start;
            gap: 0.875rem;
            padding: 1rem 0;
            border-bottom: 1px solid #f1f5f9;
        }

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

        .check-icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            border-radius: 50%;
            background: #ddf5e4;
            color: #16a34a;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            margin-top: 0.2rem;
        }

        /* FAQ */
        .faq-section {
            background: var(--color-surface);
        }

        .faq-item {
            border: 1px solid var(--color-border);
            border-radius: 1rem;
            padding: 1.5rem 1.75rem;
            margin-bottom: 1rem;
            background: var(--color-surface);
            transition: box-shadow 0.2s ease, border-color 0.2s ease;
        }

        .faq-item:hover {
            box-shadow: var(--shadow-soft);
            border-color: #c7e0ff;
        }

        .faq-question {
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            cursor: pointer;
        }

        .faq-question i {
            color: var(--color-primary);
            font-size: 0.875rem;
            transition: transform 0.2s ease;
            flex-shrink: 0;
        }

        .faq-item.open .faq-question i {
            transform: rotate(45deg);
        }

        .faq-answer {
            margin-top: 0.75rem;
            color: var(--color-text-weak);
            font-size: 0.9375rem;
            line-height: 1.7;
            display: none;
        }

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

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #0d2651 0%, #0a6cf5 60%, #0a56d1 100%);
            position: relative;
            overflow: hidden;
            padding: 5rem 0;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
        }

        .cta-content {
            position: relative;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-title {
            font-size: 2.25rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
        }

        .cta-desc {
            color: #dbeafe;
            font-size: 1.0625rem;
            margin-bottom: 2rem;
            line-height: 1.7;
        }

        /* Footer */
        .site-footer {
            background: #0b101a;
            color: #94a3b8;
            padding: 4rem 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 3rem;
            padding-bottom: 3rem;
        }

        .footer-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 1rem;
        }

        .footer-brand span {
            color: #50aeff;
        }

        .footer-desc {
            font-size: 0.9375rem;
            line-height: 1.7;
            max-width: 300px;
        }

        .footer-col h4 {
            color: #ffffff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 1.25rem;
        }

        .footer-col a {
            display: block;
            color: #94a3b8;
            font-size: 0.906rem;
            padding: 0.35rem 0;
            transition: color 0.2s ease;
        }

        .footer-col a:hover {
            color: #50aeff;
        }

        .footer-col p {
            font-size: 0.906rem;
            line-height: 1.8;
            padding: 0.2rem 0;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 1.5rem 0;
        }

        .footer-bottom .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .footer-bottom p {
            font-size: 0.8125rem;
            color: #64748b;
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.875rem;
            color: #94a3b8;
            margin-bottom: 1.5rem;
        }

        .breadcrumb a {
            color: #94a3b8;
            transition: color 0.2s ease;
        }

        .breadcrumb a:hover {
            color: #ffffff;
        }

        .breadcrumb i {
            font-size: 0.625rem;
            color: #64748b;
        }

        .breadcrumb .current {
            color: #e2e8f0;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .container {
                padding: 0 1.5rem;
            }

            .section {
                --spacing-section: 4rem;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
        }

        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }

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

            .category-hero {
                padding: 3.5rem 0 3rem;
            }

            .hero-title {
                font-size: 2.25rem;
            }

            .hero-desc {
                font-size: 1rem;
            }

            .section-title {
                font-size: 1.75rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

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

            .timeline::before {
                left: 18px;
            }

            .timeline-item {
                padding-left: 52px;
            }

            .timeline-dot {
                left: 9px;
                width: 20px;
                height: 20px;
            }

            .grid-4 {
                grid-template-columns: 1fr 1fr !important;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 1.25rem;
            }

            .category-hero {
                padding: 2.5rem 0 2rem;
            }

            .hero-title {
                font-size: 1.875rem;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .btn {
                width: 100%;
                justify-content: center;
            }

            .grid-4,
            .grid-3,
            .grid-2 {
                grid-template-columns: 1fr !important;
            }

            .section {
                --spacing-section: 3rem;
            }

            .card {
                padding: 1.5rem;
            }

            .cta-title {
                font-size: 1.75rem;
            }
        }

        /* Tailwind utilities fallback */
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }

        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
        }

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

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

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

/* roulang page: category2 */
:root {
        --brand-primary: #3b6ef5;
        --brand-dark: #1a2f6b;
        --brand-light: #e0ecff;
        --accent: #f59e0b;
        --bg-body: #f8fafc;
        --bg-white: #ffffff;
        --text-main: #1e293b;
        --text-weak: #64748b;
        --border-subtle: #e2e8f0;
        --radius-md: 12px;
        --radius-lg: 20px;
        --shadow-sm: 0 4px 20px rgba(15, 23, 42, 0.06);
        --shadow-md: 0 12px 32px rgba(15, 23, 42, 0.12);
    }

    * {
        box-sizing: border-box;
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
        background: var(--bg-body);
        color: var(--text-main);
        line-height: 1.7;
        margin: 0;
        -webkit-font-smoothing: antialiased;
    }

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

    a {
        text-decoration: none;
        color: inherit;
        transition: color 0.2s ease;
    }

    button {
        cursor: pointer;
        border: none;
        background: none;
        font-family: inherit;
    }

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

    /* ===== Header ===== */
    .site-header {
        background: rgba(15, 23, 42, 0.92);
        backdrop-filter: blur(14px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        position: sticky;
        top: 0;
        z-index: 100;
        padding: 0 0;
    }

    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 76px;
    }

    .brand {
        display: flex;
        align-items: baseline;
        gap: 2px;
        font-size: 24px;
        font-weight: 800;
        letter-spacing: -0.5px;
        color: #ffffff;
    }

    .brand-logo {
        background: linear-gradient(135deg, #60a5fa, #3b6ef5);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        font-size: 28px;
    }

    .brand-sub {
        font-size: 16px;
        color: #94a3b8;
        font-weight: 500;
        letter-spacing: 2px;
    }

    .desktop-nav {
        display: flex;
        align-items: center;
        gap: 36px;
    }

    .nav-link {
        font-size: 14px;
        font-weight: 500;
        color: #cbd5e1;
        position: relative;
        padding: 8px 2px;
        transition: color 0.2s ease;
        letter-spacing: 0.3px;
    }

    .nav-link::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 0;
        height: 2px;
        border-radius: 2px;
        background: #3b6ef5;
        transition: width 0.3s ease;
    }

    .nav-link:hover {
        color: #ffffff;
    }

    .nav-link:hover::after,
    .nav-link.active::after {
        width: 100%;
    }

    .nav-link.active {
        color: #ffffff;
        font-weight: 600;
    }

    .mobile-menu-btn {
        display: none;
        color: #e2e8f0;
        font-size: 22px;
        padding: 8px;
        border-radius: 8px;
        transition: background 0.2s;
    }

    .mobile-menu-btn:hover {
        background: rgba(255, 255, 255, 0.1);
    }

    .mobile-menu {
        display: none;
        flex-direction: column;
        padding: 12px 24px 20px;
        background: #0f172a;
        border-top: 1px solid rgba(255, 255, 255, 0.06);
    }

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

    .mobile-menu .nav-link {
        padding: 14px 8px;
        font-size: 16px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }

    .mobile-menu .nav-link:last-child {
        border-bottom: none;
    }

    .mobile-menu .nav-link.active {
        color: #60a5fa;
    }

    /* ===== Hero ===== */
    .category-hero {
        background: linear-gradient(135deg, rgba(15, 23, 42, 0.94), rgba(30, 41, 59, 0.85)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
        padding: 100px 0 72px;
        color: #ffffff;
        position: relative;
        overflow: hidden;
    }

    .category-hero::after {
        content: '';
        position: absolute;
        bottom: -2px;
        left: 0;
        right: 0;
        height: 60px;
        background: linear-gradient(to top, #f8fafc, transparent);
    }

    .hero-tag {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(59, 110, 245, 0.18);
        border: 1px solid rgba(96, 165, 250, 0.35);
        color: #93c5fd;
        font-size: 13px;
        font-weight: 500;
        padding: 6px 16px;
        border-radius: 999px;
        letter-spacing: 1px;
        margin-bottom: 24px;
    }

    .category-hero h1 {
        font-size: 48px;
        font-weight: 800;
        line-height: 1.15;
        margin: 0 0 16px;
        letter-spacing: -1px;
    }

    .category-hero h1 span {
        background: linear-gradient(120deg, #60a5fa, #a78bfa);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .category-hero p {
        font-size: 17px;
        color: #cbd5e1;
        max-width: 600px;
        line-height: 1.8;
        margin-bottom: 32px;
    }

    .hero-buttons {
        display: flex;
        gap: 16px;
        flex-wrap: wrap;
    }

    .btn-primary {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: linear-gradient(135deg, #3b6ef5, #2563eb);
        color: #ffffff;
        font-weight: 600;
        font-size: 15px;
        padding: 14px 28px;
        border-radius: 12px;
        box-shadow: 0 8px 24px rgba(59, 110, 245, 0.35);
        transition: all 0.25s ease;
    }

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 32px rgba(59, 110, 245, 0.45);
    }

    .btn-secondary {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(255, 255, 255, 0.08);
        border: 1px solid rgba(255, 255, 255, 0.16);
        color: #e2e8f0;
        font-weight: 500;
        font-size: 15px;
        padding: 14px 28px;
        border-radius: 12px;
        transition: all 0.25s ease;
        backdrop-filter: blur(8px);
    }

    .btn-secondary:hover {
        background: rgba(255, 255, 255, 0.14);
        border-color: rgba(255, 255, 255, 0.28);
    }

    /* ===== Breadcrumb ===== */
    .breadcrumb-wrap {
        padding: 24px 0 0;
        background: #f8fafc;
    }

    .breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        color: #64748b;
    }

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

    .breadcrumb i {
        font-size: 10px;
        color: #94a3b8;
    }

    /* ===== Section ===== */
    .section {
        padding: 72px 0;
    }

    .section-alt {
        background: #ffffff;
    }

    .section-head {
        max-width: 700px;
        margin-bottom: 48px;
    }

    .section-head .sec-tag {
        display: inline-block;
        background: #e0ecff;
        color: var(--brand-primary);
        font-size: 12px;
        font-weight: 700;
        padding: 5px 14px;
        border-radius: 999px;
        letter-spacing: 1.5px;
        margin-bottom: 12px;
    }

    .section-head h2 {
        font-size: 32px;
        font-weight: 800;
        line-height: 1.25;
        margin: 0 0 12px;
        letter-spacing: -0.5px;
        color: #0f172a;
    }

    .section-head p {
        color: var(--text-weak);
        font-size: 15px;
        line-height: 1.7;
    }

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

    .content-card {
        background: #ffffff;
        border-radius: var(--radius-lg);
        overflow: hidden;
        border: 1px solid rgba(226, 232, 240, 0.6);
        box-shadow: var(--shadow-sm);
        transition: all 0.3s ease;
        display: flex;
        flex-direction: column;
    }

    .content-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-md);
        border-color: rgba(59, 110, 245, 0.25);
    }

    .card-img {
        position: relative;
        height: 180px;
        overflow: hidden;
    }

    .card-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.5s ease;
    }

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

    .card-badge {
        position: absolute;
        top: 14px;
        left: 14px;
        background: rgba(15, 23, 42, 0.75);
        backdrop-filter: blur(8px);
        color: #ffffff;
        font-size: 12px;
        font-weight: 600;
        padding: 4px 12px;
        border-radius: 999px;
        letter-spacing: 0.5px;
    }

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

    .card-body h3 {
        font-size: 18px;
        font-weight: 700;
        margin: 0 0 10px;
        color: #0f172a;
        line-height: 1.4;
    }

    .card-body p {
        font-size: 14px;
        color: var(--text-weak);
        line-height: 1.7;
        margin: 0 0 16px;
        flex: 1;
    }

    .card-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 12px;
        color: #94a3b8;
        padding-top: 14px;
        border-top: 1px solid #f1f5f9;
    }

    .card-meta .read-more {
        color: var(--brand-primary);
        font-weight: 600;
        display: inline-flex;
        align-items: center;
        gap: 4px;
        transition: gap 0.2s ease;
    }

    .card-meta .read-more:hover {
        gap: 8px;
    }

    /* ===== Stats ===== */
    .stats-section {
        background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
        padding: 64px 0;
        color: #ffffff;
        position: relative;
        overflow: hidden;
    }

    .stats-section::before {
        content: '';
        position: absolute;
        top: -50%;
        right: -20%;
        width: 500px;
        height: 500px;
        background: radial-gradient(circle, rgba(59, 110, 245, 0.2), transparent 60%);
        border-radius: 50%;
    }

    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 32px;
        position: relative;
        z-index: 1;
    }

    .stat-item {
        text-align: center;
        padding: 20px;
    }

    .stat-num {
        font-size: 44px;
        font-weight: 800;
        background: linear-gradient(120deg, #60a5fa, #a78bfa);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        line-height: 1.2;
    }

    .stat-label {
        font-size: 14px;
        color: #94a3b8;
        margin-top: 8px;
    }

    /* ===== Technique List ===== */
    .technique-wrap {
        display: grid;
        grid-template-columns: 1.1fr 0.9fr;
        gap: 48px;
        align-items: center;
    }

    .technique-list {
        display: flex;
        flex-direction: column;
        gap: 16px;
    }

    .technique-item {
        display: flex;
        gap: 18px;
        background: #ffffff;
        border: 1px solid rgba(226, 232, 240, 0.7);
        border-radius: 16px;
        padding: 20px 24px;
        box-shadow: var(--shadow-sm);
        transition: all 0.3s ease;
    }

    .technique-item:hover {
        box-shadow: var(--shadow-md);
        transform: translateX(6px);
        border-color: rgba(59, 110, 245, 0.3);
    }

    .tech-num {
        width: 40px;
        height: 40px;
        border-radius: 12px;
        background: linear-gradient(135deg, #3b6ef5, #2563eb);
        color: #ffffff;
        font-weight: 800;
        font-size: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
    }

    .tech-content h4 {
        font-size: 16px;
        font-weight: 700;
        margin: 0 0 6px;
        color: #0f172a;
    }

    .tech-content p {
        font-size: 14px;
        color: var(--text-weak);
        margin: 0;
        line-height: 1.6;
    }

    .technique-image {
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-md);
    }

    .technique-image img {
        width: 100%;
        height: 420px;
        object-fit: cover;
    }

    /* ===== Timeline ===== */
    .timeline-wrap {
        max-width: 820px;
        margin: 0 auto;
        position: relative;
        padding: 20px 0;
    }

    .timeline-line {
        position: absolute;
        left: 20px;
        top: 0;
        bottom: 0;
        width: 2px;
        background: linear-gradient(180deg, #3b6ef5, #a78bfa, transparent);
    }

    .timeline-item {
        display: flex;
        gap: 32px;
        position: relative;
        margin-bottom: 32px;
    }

    .timeline-dot {
        width: 42px;
        height: 42px;
        background: #ffffff;
        border: 2px solid #3b6ef5;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        color: #3b6ef5;
        font-size: 14px;
        flex-shrink: 0;
        z-index: 2;
        box-shadow: 0 0 0 4px rgba(59, 110, 245, 0.12);
    }

    .timeline-card {
        background: #ffffff;
        border-radius: 16px;
        padding: 24px 28px;
        box-shadow: var(--shadow-sm);
        border: 1px solid rgba(226, 232, 240, 0.6);
        flex: 1;
    }

    .timeline-card h4 {
        font-size: 18px;
        font-weight: 700;
        margin: 0 0 6px;
        color: #0f172a;
    }

    .timeline-card .phase {
        font-size: 13px;
        color: #3b6ef5;
        font-weight: 600;
        margin-bottom: 8px;
        display: block;
    }

    .timeline-card p {
        font-size: 14px;
        color: var(--text-weak);
        margin: 0;
        line-height: 1.7;
    }

    /* ===== FAQ ===== */
    .faq-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
        max-width: 920px;
        margin: 0 auto;
    }

    .faq-item {
        background: #ffffff;
        border: 1px solid rgba(226, 232, 240, 0.7);
        border-radius: 16px;
        padding: 24px 28px;
        transition: all 0.3s ease;
    }

    .faq-item:hover {
        border-color: rgba(59, 110, 245, 0.3);
        box-shadow: var(--shadow-sm);
    }

    .faq-item h4 {
        font-size: 15px;
        font-weight: 700;
        color: #0f172a;
        margin: 0 0 8px;
        display: flex;
        gap: 8px;
        align-items: flex-start;
    }

    .faq-item h4 i {
        color: #3b6ef5;
        font-size: 14px;
        margin-top: 4px;
    }

    .faq-item p {
        font-size: 14px;
        color: var(--text-weak);
        margin: 0;
        line-height: 1.7;
    }

    /* ===== CTA ===== */
    .cta-section {
        background: linear-gradient(135deg, #1a2f6b, #2563eb);
        padding: 64px 0;
        color: #ffffff;
        text-align: center;
        position: relative;
        overflow: hidden;
    }

    .cta-section::before {
        content: '';
        position: absolute;
        top: -50%;
        left: -20%;
        width: 400px;
        height: 400px;
        background: radial-gradient(circle, rgba(255, 255, 255, 0.12), transparent 60%);
        border-radius: 50%;
    }

    .cta-section h2 {
        font-size: 34px;
        font-weight: 800;
        margin: 0 0 16px;
        position: relative;
    }

    .cta-section p {
        font-size: 16px;
        color: rgba(255, 255, 255, 0.85);
        max-width: 560px;
        margin: 0 auto 32px;
        position: relative;
    }

    .cta-btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: #ffffff;
        color: #1a2f6b;
        font-weight: 700;
        font-size: 16px;
        padding: 16px 36px;
        border-radius: 14px;
        box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
        transition: all 0.25s ease;
        position: relative;
    }

    .cta-btn:hover {
        transform: translateY(-3px) scale(1.02);
        box-shadow: 0 16px 40px rgba(0, 0, 0, 0.25);
    }

    /* ===== Footer ===== */
    .site-footer {
        background: #0f172a;
        color: #94a3b8;
        padding: 60px 0 0;
        font-size: 14px;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 1.6fr 0.8fr 0.8fr 1fr;
        gap: 48px;
        padding-bottom: 40px;
    }

    .footer-brand {
        font-size: 22px;
        font-weight: 800;
        color: #ffffff;
        margin-bottom: 12px;
    }

    .footer-brand span {
        background: linear-gradient(135deg, #60a5fa, #3b6ef5);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .footer-desc {
        font-size: 14px;
        line-height: 1.8;
        color: #7a8ba6;
        max-width: 320px;
    }

    .footer-col h4 {
        color: #ffffff;
        font-size: 16px;
        font-weight: 700;
        margin: 0 0 18px;
    }

    .footer-col a {
        display: block;
        color: #7a8ba6;
        margin-bottom: 12px;
        transition: color 0.2s;
    }

    .footer-col a:hover {
        color: #60a5fa;
    }

    .footer-col p {
        margin: 0 0 10px;
        color: #7a8ba6;
        line-height: 1.7;
    }

    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.07);
        padding: 20px 0;
        font-size: 13px;
    }

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

    .footer-bottom p {
        margin: 0;
        color: #64748b;
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        .card-grid {
            grid-template-columns: repeat(2, 1fr);
        }

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

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

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

    @media (max-width: 768px) {
        .desktop-nav {
            display: none;
        }

        .mobile-menu-btn {
            display: block;
        }

        .category-hero {
            padding: 72px 0 56px;
        }

        .category-hero h1 {
            font-size: 34px;
        }

        .section {
            padding: 56px 0;
        }

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

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

        .timeline-item {
            gap: 16px;
        }

        .timeline-line {
            left: 20px;
        }

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

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

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

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

    @media (max-width: 520px) {
        .container {
            padding: 0 18px;
        }

        .header-inner {
            height: 64px;
        }

        .brand {
            font-size: 20px;
        }

        .brand-logo {
            font-size: 24px;
        }

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

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

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

        .btn-primary,
        .btn-secondary {
            width: 100%;
            justify-content: center;
        }

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

        .stat-num {
            font-size: 32px;
        }

        .card-body {
            padding: 18px;
        }

        .timeline-card {
            padding: 18px;
        }

        .technique-item {
            padding: 16px 16px;
        }

        .cta-section h2 {
            font-size: 24px;
        }

        .cta-btn {
            width: 100%;
            justify-content: center;
        }

        .faq-item {
            padding: 18px;
        }
    }

    /* ===== Focus ===== */
    .nav-link:focus-visible,
    .btn-primary:focus-visible,
    .btn-secondary:focus-visible,
    .cta-btn:focus-visible,
    .card-meta a:focus-visible {
        outline: 2px solid #f59e0b;
        outline-offset: 3px;
    }

/* roulang page: article */
:root {
  --brand: #c08a20;
  --brand-light: #e5bc4e;
  --brand-dark: #85541b;
  --bg-body: #060a12;
  --bg-section: #0b1120;
  --bg-card: #11192b;
  --bg-card-hover: #1a2438;
  --border-soft: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text-strong: #f1f5f9;
  --text-body: #cbd5e1;
  --text-weak: #64748b;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.45);
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-body);
  color: var(--text-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}
img {
  max-width: 100%;
  display: block;
}
button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
::selection {
  background: rgba(192, 138, 32, 0.3);
  color: #fff;
}
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: #0a0f1a;
}
::-webkit-scrollbar-thumb {
  background: #2a3550;
  border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--brand);
}
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-light), var(--brand), var(--brand-light));
  z-index: 1200;
  width: 0;
  transition: width 0.1s linear;
}
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(6, 10, 18, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.site-header.scrolled {
  background: rgba(6, 10, 18, 0.96);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 2px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-strong);
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.brand-logo {
  color: var(--brand-light);
  font-size: 1.7rem;
}
.brand-sub {
  color: var(--text-strong);
  font-weight: 600;
}
.desktop-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 16px;
  font-size: 0.95rem;
  color: var(--text-body);
  border-radius: 999px;
  transition: color 0.2s ease, background 0.2s ease;
}
.nav-link:hover {
  color: var(--text-strong);
  background: rgba(255, 255, 255, 0.05);
}
.nav-link.active {
  color: var(--brand-light);
  background: rgba(192, 138, 32, 0.1);
}
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 2px;
  transform: translateX(-50%);
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--brand);
}
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.25rem;
  color: var(--text-strong);
  cursor: pointer;
  padding: 8px 10px;
  border-radius: 10px;
  transition: background 0.2s ease;
}
.mobile-menu-btn:hover {
  background: rgba(255, 255, 255, 0.08);
}
.mobile-menu {
  display: none;
  background: rgba(6, 10, 18, 0.97);
  backdrop-filter: blur(20px);
  padding: 12px 24px 20px;
  border-bottom: 1px solid var(--border-soft);
}
.mobile-menu.open {
  display: block;
}
.mobile-menu .nav-link {
  display: block;
  padding: 12px 16px;
  font-size: 1rem;
  border-radius: 12px;
}
.mobile-menu .nav-link.active {
  background: rgba(192, 138, 32, 0.12);
}
.article-hero {
  position: relative;
  padding: 160px 0 100px;
  overflow: hidden;
  border-bottom: 1px solid var(--border-soft);
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-size: cover;
  background-position: center;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(6, 10, 18, 0.55) 0%, rgba(6, 10, 18, 0.82) 60%, var(--bg-body) 100%);
}
.article-hero .container {
  position: relative;
  z-index: 2;
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-weak);
  margin-bottom: 24px;
}
.breadcrumb a {
  color: var(--text-weak);
  transition: color 0.2s ease;
}
.breadcrumb a:hover {
  color: var(--brand-light);
}
.breadcrumb i {
  font-size: 0.7rem;
  color: var(--text-weak);
  opacity: 0.6;
}
.category-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 16px;
  background: rgba(192, 138, 32, 0.12);
  border: 1px solid rgba(192, 138, 32, 0.3);
  color: var(--brand-light);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.article-hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-strong);
  margin: 22px 0 26px;
  letter-spacing: -0.01em;
  max-width: 840px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  font-size: 0.9rem;
  color: var(--text-weak);
}
.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.article-meta i {
  color: var(--brand);
  font-size: 0.85rem;
}
.article-main-section {
  padding: 80px 0 60px;
}
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 52px;
  align-items: start;
}
.article-body {
  min-width: 0;
}
.article-content {
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--text-body);
  word-wrap: break-word;
}
.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-strong);
  margin: 2.25rem 0 1rem;
  padding-left: 14px;
  border-left: 3px solid var(--brand);
  line-height: 1.4;
}
.article-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-strong);
  margin: 1.75rem 0 0.9rem;
}
.article-content p {
  margin-bottom: 1.25rem;
}
.article-content ul,
.article-content ol {
  margin: 1.25rem 0 1.25rem 1.25rem;
  padding-left: 0.5rem;
}
.article-content li {
  margin-bottom: 0.5rem;
}
.article-content blockquote {
  padding: 16px 20px;
  border-left: 3px solid var(--brand);
  background: rgba(192, 138, 32, 0.07);
  border-radius: 0 12px 12px 0;
  margin: 1.5rem 0;
  color: var(--text-body);
}
.article-content blockquote p {
  margin-bottom: 0;
}
.article-content a {
  color: var(--brand-light);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}
.article-content a:hover {
  border-bottom-color: var(--brand-light);
}
.article-content img {
  border-radius: 16px;
  margin: 1.5rem 0;
  box-shadow: var(--shadow-card);
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}
.article-content th,
.article-content td {
  padding: 12px 16px;
  border: 1px solid var(--border-soft);
  text-align: left;
}
.article-content th {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-strong);
  font-weight: 600;
}
.article-content hr {
  border: none;
  border-top: 1px solid var(--border-soft);
  margin: 2rem 0;
}
.article-footer-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 44px;
  padding-top: 26px;
  border-top: 1px solid var(--border-soft);
}
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  font-size: 0.82rem;
  color: var(--text-weak);
  transition: all 0.2s ease;
}
.tag:hover {
  color: var(--brand-light);
  border-color: rgba(192, 138, 32, 0.4);
  background: rgba(192, 138, 32, 0.06);
}
.share-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-weak);
}
.share-icon {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-soft);
  color: var(--text-body);
  transition: all 0.2s ease;
}
.share-icon:hover {
  color: var(--brand-light);
  background: rgba(192, 138, 32, 0.12);
  border-color: rgba(192, 138, 32, 0.3);
  transform: translateY(-2px);
}
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: 96px;
}
.sidebar-card {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color 0.2s ease;
}
.sidebar-card:hover {
  border-color: rgba(255, 255, 255, 0.14);
}
.sidebar-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.sidebar-title i {
  color: var(--brand);
}
.sidebar-brand {
  text-align: center;
  padding: 32px 24px;
}
.sidebar-brand-logo {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--brand-light);
  letter-spacing: -0.02em;
}
.sidebar-brand p {
  font-size: 0.88rem;
  color: var(--text-weak);
  margin-top: 10px;
  line-height: 1.75;
}
.sidebar-brand .btn-outline {
  margin-top: 18px;
  padding: 9px 22px;
  font-size: 0.88rem;
}
.sidebar-cat-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.sidebar-cat-list a {
  padding: 11px 14px;
  border-radius: 10px;
  font-size: 0.92rem;
  color: var(--text-body);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.2s ease;
}
.sidebar-cat-list a:hover {
  background: rgba(192, 138, 32, 0.08);
  color: var(--brand-light);
}
.sidebar-cat-list a i {
  font-size: 0.75rem;
  color: var(--text-weak);
  opacity: 0.6;
}
.sidebar-note {
  background: linear-gradient(135deg, rgba(192, 138, 32, 0.12), rgba(192, 138, 32, 0.02));
  border: 1px solid rgba(192, 138, 32, 0.22);
}
.sidebar-note p {
  font-size: 0.9rem;
  color: var(--text-weak);
  line-height: 1.75;
}
.sidebar-note .contact-line {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  font-size: 0.85rem;
  color: var(--text-body);
}
.sidebar-note .contact-line i {
  color: var(--brand);
  width: 16px;
  font-size: 0.9rem;
}
.not-found-box {
  text-align: center;
  padding: 80px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
}
.not-found-box i {
  font-size: 3rem;
  color: var(--brand);
  margin-bottom: 24px;
  display: inline-block;
}
.not-found-box h2 {
  font-size: 1.5rem;
  color: var(--text-strong);
  margin-bottom: 12px;
  font-weight: 700;
}
.not-found-box p {
  color: var(--text-weak);
  margin-bottom: 30px;
}
.btn-primary {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: linear-gradient(135deg, #e5bc4e, #c08a20);
  color: #0b1120;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: 0 4px 16px rgba(192, 138, 32, 0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(192, 138, 32, 0.4);
}
.btn-primary:focus-visible {
  outline: 2px solid var(--brand-light);
  outline-offset: 2px;
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: transparent;
  color: var(--text-strong);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  cursor: pointer;
  transition: all 0.25s ease;
}
.btn-outline:hover {
  border-color: rgba(192, 138, 32, 0.6);
  color: var(--brand-light);
  transform: translateY(-2px);
}
.btn-outline:focus-visible {
  outline: 2px solid var(--brand-light);
  outline-offset: 2px;
}
.related-section {
  background: var(--bg-section);
  padding: 80px 0;
  border-top: 1px solid var(--border-soft);
}
.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}
.section-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-strong);
  letter-spacing: -0.02em;
  line-height: 1.3;
}
.section-title span {
  color: var(--brand-light);
}
.section-subtitle {
  font-size: 0.95rem;
  color: var(--text-weak);
  margin-top: 6px;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: rgba(192, 138, 32, 0.35);
}
.article-card-img {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}
.article-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.article-card:hover .article-card-img img {
  transform: scale(1.05);
}
.card-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 1;
  padding: 3px 12px;
  background: rgba(6, 10, 18, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--brand-light);
  border: 1px solid rgba(192, 138, 32, 0.4);
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
}
.article-card-body {
  padding: 20px 22px 24px;
}
.article-card-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-strong);
  line-height: 1.5;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-card-body p {
  font-size: 0.88rem;
  color: var(--text-weak);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-card-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 14px;
  font-size: 0.8rem;
  color: var(--text-weak);
}
.article-card-meta i {
  color: var(--brand);
  font-size: 0.72rem;
}
.article-card-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.empty-list {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  color: var(--text-weak);
  font-size: 0.95rem;
}
.faq-section {
  padding: 80px 0;
  border-top: 1px solid var(--border-soft);
}
.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 24px 26px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.faq-item:hover {
  border-color: rgba(192, 138, 32, 0.3);
  transform: translateY(-2px);
}
.faq-item h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 10px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.5;
}
.faq-item h3 i {
  color: var(--brand);
  font-size: 0.85rem;
  margin-top: 4px;
  flex-shrink: 0;
}
.faq-item p {
  font-size: 0.92rem;
  color: var(--text-weak);
  line-height: 1.7;
  padding-left: 24px;
}
.cta-section {
  padding-bottom: 80px;
}
.cta-box {
  position: relative;
  padding: 64px 48px;
  background: linear-gradient(135deg, #0b1120, #1a2438);
  border: 1px solid rgba(192, 138, 32, 0.25);
  border-radius: 24px;
  overflow: hidden;
  text-align: center;
}
.cta-box::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -80px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(192, 138, 32, 0.16), transparent 65%);
  pointer-events: none;
}
.cta-box::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -60px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(192, 138, 32, 0.08), transparent 60%);
  pointer-events: none;
}
.cta-box h2 {
  position: relative;
  z-index: 1;
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-strong);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}
.cta-box p {
  position: relative;
  z-index: 1;
  font-size: 1rem;
  color: var(--text-weak);
  max-width: 520px;
  margin: 0 auto 30px;
}
.cta-box .cta-actions {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}
.site-footer {
  background: #05080e;
  border-top: 1px solid var(--border-soft);
  padding-top: 60px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 44px;
}
.footer-brand {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-strong);
  letter-spacing: -0.02em;
}
.footer-brand span {
  color: var(--brand-light);
}
.footer-desc {
  font-size: 0.9rem;
  color: var(--text-weak);
  margin-top: 12px;
  max-width: 320px;
  line-height: 1.75;
}
.footer-col h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-strong);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: var(--text-weak);
  padding: 5px 0;
  transition: color 0.2s ease;
}
.footer-col a:hover {
  color: var(--brand-light);
}
.footer-col p {
  font-size: 0.9rem;
  color: var(--text-weak);
  padding: 5px 0;
}
.footer-bottom {
  border-top: 1px solid var(--border-soft);
  padding: 20px 0;
}
.footer-bottom .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}
.footer-bottom p {
  font-size: 0.85rem;
  color: var(--text-weak);
}
@media (max-width: 1024px) {
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .article-sidebar {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 768px) {
  .desktop-nav {
    display: none;
  }
  .mobile-menu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .mobile-menu {
    display: none;
  }
  .mobile-menu.open {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }
  .article-hero {
    padding: 120px 0 64px;
  }
  .article-hero h1 {
    font-size: 1.6rem;
  }
  .article-main-section {
    padding: 56px 0 44px;
  }
  .faq-grid {
    grid-template-columns: 1fr;
  }
  .cta-box {
    padding: 48px 28px;
  }
  .cta-box h2 {
    font-size: 1.4rem;
  }
  .article-sidebar {
    display: flex;
    flex-direction: column;
  }
  .section-title {
    font-size: 1.4rem;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }
}
@media (max-width: 520px) {
  .related-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .article-meta {
    gap: 12px;
  }
  .header-inner {
    height: 62px;
  }
  .brand {
    font-size: 1.25rem;
  }
  .brand-logo {
    font-size: 1.4rem;
  }
  .article-hero h1 {
    font-size: 1.35rem;
  }
  .footer-bottom .container {
    flex-direction: column;
    text-align: center;
  }
  .article-footer-bar {
    flex-direction: column;
    align-items: flex-start;
  }
  .cta-box {
    padding: 40px 22px;
  }
  .cta-box .cta-actions {
    flex-direction: column;
    width: 100%;
  }
  .cta-box .cta-actions .btn-primary,
  .cta-box .cta-actions .btn-outline {
    width: 100%;
    justify-content: center;
  }
  .faq-item {
    padding: 20px;
  }
}

/* roulang page: category3 */
:root {
    --primary: #4f46e5;
    --primary-dark: #3730a3;
    --primary-light: #eef2ff;
    --accent: #f59e0b;
    --bg: #f8fafc;
    --text: #0f172a;
    --text-light: #475569;
    --text-faint: #94a3b8;
    --border: #e2e8f0;
    --card-shadow: 0 2px 20px rgba(15, 23, 42, 0.06);
    --card-shadow-hover: 0 16px 40px rgba(15, 23, 42, 0.10);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --space-section: 96px;
  }

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

  h1, h2, h3, h4, h5 {
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.02em;
  }

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

  /* ===== Header / Nav ===== */
  .site-header {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    position: sticky;
    top: 0;
    z-index: 50;
  }

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

  .brand {
    display: flex;
    align-items: baseline;
    gap: 2px;
    text-decoration: none;
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.04em;
  }

  .brand-logo {
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 900;
  }

  .brand-sub {
    font-weight: 500;
    color: #334155;
    font-size: 1.1rem;
    margin-left: 2px;
  }

  .desktop-nav {
    display: flex;
    align-items: center;
    gap: 40px;
  }

  .nav-link {
    position: relative;
    font-size: 0.95rem;
    font-weight: 500;
    color: #475569;
    text-decoration: none;
    padding: 8px 2px;
    transition: color 0.2s ease;
    letter-spacing: 0.02em;
  }

  .nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, #4f46e5, #7c3aed);
    transition: width 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  }

  .nav-link:hover {
    color: var(--text);
  }

  .nav-link:hover::after,
  .nav-link.active::after {
    width: 100%;
  }

  .nav-link.active {
    color: var(--text);
    font-weight: 600;
  }

  .mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.4rem;
    color: var(--text);
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: background 0.2s;
  }

  .mobile-menu-btn:hover {
    background: #f1f5f9;
  }

  .mobile-menu {
    display: none;
    padding: 12px 0 18px;
    border-top: 1px solid var(--border);
    flex-direction: column;
    gap: 4px;
  }

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

  .mobile-menu .nav-link {
    padding: 12px 8px;
    border-radius: 10px;
    font-size: 1rem;
  }

  .mobile-menu .nav-link:hover {
    background: #f8fafc;
  }

  /* ===== Hero Banner ===== */
  .page-hero {
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 60%, #312e81 100%);
    color: #fff;
    padding: 88px 0 72px;
    position: relative;
    overflow: hidden;
  }

  .page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    opacity: 0.18;
  }

  .page-hero::after {
    content: '';
    position: absolute;
    top: -120px;
    right: -60px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.3), transparent 70%);
    border-radius: 50%;
    pointer-events: none;
  }

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

  .hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.16);
    padding: 6px 16px;
    border-radius: 999px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 24px;
    backdrop-filter: blur(8px);
  }

  .hero-title {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    line-height: 1.15;
    margin-bottom: 20px;
  }

  .hero-title span {
    background: linear-gradient(120deg, #a5b4fc, #818cf8, #c4b5fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .hero-desc {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.75);
    max-width: 620px;
    margin-bottom: 32px;
    line-height: 1.8;
  }

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

  .hero-meta-item {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .hero-meta-item i {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.12);
    font-size: 1rem;
    color: #a5b4fc;
  }

  .hero-meta-item span {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.85);
  }

  /* ===== Section spacing ===== */
  .section {
    padding: 88px 0;
  }

  .section-alt {
    background: #ffffff;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
  }

  .section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 56px;
  }

  .section-kicker {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--primary);
    background: var(--primary-light);
    padding: 6px 14px;
    border-radius: 999px;
    margin-bottom: 16px;
  }

  .section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    margin-bottom: 16px;
    color: var(--text);
  }

  .section-desc {
    color: var(--text-light);
    font-size: 1.05rem;
    line-height: 1.8;
  }

  /* ===== FAQ Category Cards ===== */
  .faq-cat-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .faq-cat-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
    position: relative;
    overflow: hidden;
  }

  .faq-cat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #4f46e5, #7c3aed);
    opacity: 0;
    transition: opacity 0.3s;
  }

  .faq-cat-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--card-shadow-hover);
    border-color: transparent;
  }

  .faq-cat-card:hover::before {
    opacity: 1;
  }

  .faq-cat-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 18px;
    font-size: 1.5rem;
    background: linear-gradient(135deg, #eef2ff, #e0e7ff);
    color: var(--primary);
  }

  .faq-cat-card h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
  }

  .faq-cat-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.6;
  }

  .faq-cat-card .cat-count {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #f8fafc;
    border: 1px solid var(--border);
    padding: 4px 14px;
    border-radius: 999px;
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 16px;
    transition: all 0.3s;
  }

  .faq-cat-card:hover .cat-count {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
  }

  /* ===== Search / Quick Help ===== */
  .help-search-wrap {
    background: linear-gradient(135deg, #f8fafc, #eef2ff);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 48px;
    display: flex;
    align-items: center;
    gap: 48px;
  }

  .help-search-left {
    flex: 1;
  }

  .help-search-left h3 {
    font-size: 1.6rem;
    margin-bottom: 8px;
  }

  .help-search-left p {
    color: var(--text-light);
    margin-bottom: 24px;
  }

  .search-box {
    display: flex;
    background: #fff;
    border-radius: 14px;
    border: 1px solid var(--border);
    padding: 6px 6px 6px 18px;
    box-shadow: var(--card-shadow);
    max-width: 520px;
    transition: box-shadow 0.3s, border-color 0.3s;
  }

  .search-box:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
  }

  .search-box i {
    color: var(--text-faint);
    display: flex;
    align-items: center;
    font-size: 1rem;
  }

  .search-box input {
    flex: 1;
    border: none;
    outline: none;
    padding: 12px 12px;
    font-size: 0.95rem;
    background: transparent;
    color: var(--text);
  }

  .search-box button {
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 10px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
  }

  .search-box button:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
  }

  .help-search-right {
    flex: 0 0 280px;
  }

  .help-search-right img {
    width: 100%;
    border-radius: 18px;
    box-shadow: 0 12px 32px rgba(15, 23, 42, 0.14);
  }

  /* ===== FAQ Accordion ===== */
  .faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px 48px;
  }

  .faq-item {
    border-bottom: 1px solid #e2e8f0;
    padding: 20px 0;
    transition: padding 0.3s;
  }

  .faq-item-title {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    cursor: pointer;
    user-select: none;
  }

  .faq-item-title h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text);
    line-height: 1.5;
    transition: color 0.2s;
  }

  .faq-item-title:hover h3 {
    color: var(--primary);
  }

  .faq-item-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: #f1f5f9;
    color: var(--text-light);
    font-size: 0.8rem;
    transition: all 0.3s;
    margin-top: 2px;
  }

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

  .faq-item-answer {
    display: none;
    padding-top: 14px;
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.75;
  }

  .faq-item.open .faq-item-answer {
    display: block;
    animation: fadeSlide 0.3s ease;
  }

  @keyframes fadeSlide {
    from {
      opacity: 0;
      transform: translateY(-8px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .faq-section-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 48px 0 8px;
  }

  .faq-section-header .num {
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--primary);
  }

  .faq-section-header h3 {
    font-size: 1.25rem;
  }

  /* ===== Statistics ===== */
  .stats-wrap {
    background: #0f172a;
    border-radius: 24px;
    padding: 56px 48px;
    color: #fff;
    position: relative;
    overflow: hidden;
  }

  .stats-wrap::before {
    content: '';
    position: absolute;
    top: -80px;
    right: -80px;
    width: 260px;
    height: 260px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.25), transparent 70%);
    border-radius: 50%;
  }

  .stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    position: relative;
    z-index: 2;
  }

  .stat-item {
    text-align: center;
    padding: 24px 16px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
  }

  .stat-num {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(120deg, #a5b4fc, #e0e7ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.3;
  }

  .stat-num small {
    font-size: 1rem;
    background: none;
    -webkit-text-fill-color: #94a3b8;
    margin-left: 2px;
  }

  .stat-label {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.65);
    margin-top: 8px;
  }

  /* ===== Timeline ===== */
  .timeline-wrap {
    position: relative;
    padding-left: 32px;
    max-width: 760px;
    margin: 0 auto;
  }

  .timeline-wrap::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, #4f46e5, #a5b4fc, transparent);
    border-radius: 2px;
  }

  .timeline-item {
    position: relative;
    padding-bottom: 40px;
  }

  .timeline-item:last-child {
    padding-bottom: 0;
  }

  .timeline-item::before {
    content: '';
    position: absolute;
    left: -28px;
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #fff;
    border: 3px solid var(--primary);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.15);
  }

  .timeline-item .time-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-light);
    padding: 4px 12px;
    border-radius: 999px;
    margin-bottom: 10px;
  }

  .timeline-item h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
  }

  .timeline-item p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.75;
  }

  /* ===== CTA ===== */
  .cta-block {
    text-align: center;
    padding: 72px 48px;
    border-radius: 28px;
    background: linear-gradient(135deg, #0f172a, #1e1b4b);
    color: #fff;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.08);
  }

  .cta-block::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    opacity: 0.12;
  }

  .cta-block::after {
    content: '';
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.3), transparent 70%);
    border-radius: 50%;
    pointer-events: none;
  }

  .cta-block > * {
    position: relative;
    z-index: 2;
  }

  .cta-block h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    margin-bottom: 16px;
  }

  .cta-block p {
    color: rgba(255, 255, 255, 0.7);
    max-width: 560px;
    margin: 0 auto 32px;
    font-size: 1.05rem;
  }

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

  .btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 14px 32px;
    border-radius: 14px;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
    border: none;
    cursor: pointer;
  }

  .btn i {
    font-size: 0.9rem;
  }

  .btn-primary {
    background: #fff;
    color: #0f172a;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255, 255, 255, 0.2);
  }

  .btn-outline-light {
    background: transparent;
    color: #fff;
    border: 1.5px solid rgba(255, 255, 255, 0.3);
  }

  .btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.6);
    transform: translateY(-2px);
  }

  /* ===== Footer ===== */
  .site-footer {
    background: #0f172a;
    color: rgba(255, 255, 255, 0.7);
    padding-top: 64px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 48px;
    padding-bottom: 48px;
  }

  .footer-brand {
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
  }

  .footer-brand span {
    background: linear-gradient(120deg, #818cf8, #c4b5fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .footer-desc {
    font-size: 0.9rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.6);
    max-width: 320px;
  }

  .footer-col h4 {
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 18px;
    letter-spacing: 0.02em;
  }

  .footer-col a {
    display: block;
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 4px 0;
    transition: color 0.2s, transform 0.2s;
  }

  .footer-col a:hover {
    color: #a5b4fc;
    transform: translateX(4px);
  }

  .footer-col p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    margin: 4px 0;
  }

  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
  }

  .footer-bottom .container-site {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
  }

  .footer-bottom p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
  }

  /* ===== Responsive ===== */
  @media (max-width: 1024px) {
    :root {
      --space-section: 72px;
    }

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

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

    .help-search-wrap {
      flex-direction: column;
      padding: 36px;
    }

    .help-search-right {
      flex: none;
      width: 100%;
      max-width: 360px;
    }

    .faq-grid {
      grid-template-columns: 1fr;
      gap: 0;
    }

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

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

    .desktop-nav {
      display: none;
    }

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

    .page-hero {
      padding: 56px 0 48px;
    }

    .hero-meta {
      flex-direction: column;
      gap: 16px;
    }

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

    .stats-grid {
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .stats-wrap {
      padding: 32px 20px;
    }

    .stat-num {
      font-size: 1.6rem;
    }

    .cta-block {
      padding: 48px 24px;
    }

    .btn {
      padding: 12px 24px;
      font-size: 0.9rem;
    }

    .container-site {
      padding: 0 20px;
    }
  }

  @media (max-width: 520px) {
    .faq-cat-grid {
      grid-template-columns: 1fr;
    }

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

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

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

    .search-box {
      flex-direction: column;
      padding: 8px;
      gap: 8px;
    }

    .search-box button {
      width: 100%;
    }

    .help-search-wrap {
      padding: 24px;
    }

    .page-hero {
      padding: 44px 0 40px;
    }

    .hero-title {
      font-size: 1.8rem;
    }

    .hero-desc {
      font-size: 0.95rem;
    }

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

    .section-desc {
      font-size: 0.95rem;
    }
  }

  /* ===== A11y focus ===== */
  a:focus-visible,
  button:focus-visible,
  input:focus-visible {
    outline: 3px solid rgba(99, 102, 241, 0.5);
    outline-offset: 2px;
    border-radius: 6px;
  }