/* roulang page: index */
:root {
            --primary: #1e40af; --primary-light: #3b82f6; --primary-dark: #172e7a;
            --accent: #f59e0b; --accent-light: #fbbf24; --dark-bg: #0f172a;
            --bg: #f1f5f9; --white: #ffffff; --text: #1e293b; --text-light: #64748b;
            --border: #e2e8f0; --radius-sm: 8px; --radius: 14px; --radius-lg: 22px;
            --shadow-sm: 0 2px 10px rgba(15,23,42,0.05); --shadow: 0 6px 22px rgba(15,23,42,0.08);
            --shadow-lg: 0 14px 44px rgba(15,23,42,0.12); --sec: 84px;
            --transition: all 0.3s cubic-bezier(.4,0,.2,1);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif; background: var(--bg); color: var(--text); line-height: 1.7; -webkit-font-smoothing: antialiased; }
        a { text-decoration: none; color: inherit; }
        img { max-width: 100%; display: block; }
        button, input, select, textarea { font: inherit; border: none; outline: none; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .section-pad { padding: var(--sec) 0; }
        .section-title { font-size: 2rem; font-weight: 700; color: var(--text); line-height: 1.3; letter-spacing: -0.02em; }
        .section-sub { font-size: 1.05rem; color: var(--text-light); margin-top: 12px; max-width: 640px; }
        .section-head { text-align: center; margin-bottom: 48px; }
        .section-head .badge { display: inline-flex; align-items: center; gap: 6px; background: rgba(30,64,175,0.08); color: var(--primary); font-size: .8rem; font-weight: 600; padding: 6px 16px; border-radius: 50px; letter-spacing: .05em; margin-bottom: 16px; }
        /* header */
        .site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.92); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); box-shadow: var(--shadow-sm); }
        .nav-wrap { display: flex; align-items: center; justify-content: center; height: 68px; max-width: 1280px; margin: 0 auto; padding: 0 20px; position: relative; }
        .nav-group { display: flex; align-items: center; gap: 4px; }
        .nav-group--right { margin-left: auto; }
        .nav-group--left { margin-right: auto; }
        .nav-center { position: absolute; left: 50%; transform: translateX(-50%); display: flex; align-items: center; }
        .nav-logo { font-size: 1.25rem; font-weight: 800; color: var(--primary); white-space: nowrap; letter-spacing: -0.02em; display: flex; align-items: center; gap: 6px; }
        .nav-logo .logo-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); display: inline-block; }
        .nav-link { padding: 8px 18px; font-size: .9rem; font-weight: 500; color: var(--text-light); border-radius: 50px; transition: var(--transition); white-space: nowrap; }
        .nav-link:hover { color: var(--primary); background: rgba(30,64,175,0.06); }
        .nav-link.active { color: var(--primary); background: rgba(30,64,175,0.1); font-weight: 600; }
        .nav-mobile-toggle { display: none; margin-left: auto; width: 40px; height: 40px; border-radius: 50%; background: var(--bg); color: var(--text); font-size: 1.1rem; align-items: center; justify-content: center; cursor: pointer; }
        .nav-mobile-menu { display: none; }
        @media (max-width: 900px) {
            .nav-group--left, .nav-group--right { display: none; }
            .nav-mobile-toggle { display: flex; }
            .nav-wrap { justify-content: space-between; height: 60px; }
            .nav-center { position: static; transform: none; }
            .nav-mobile-menu { display: none; flex-direction: column; background: var(--white); border-top: 1px solid var(--border); padding: 12px 0; position: absolute; top: 60px; left: 0; right: 0; box-shadow: var(--shadow); border-radius: 0 0 16px 16px; }
            .nav-mobile-menu.open { display: flex; }
            .nav-mobile-menu .nav-link { padding: 12px 24px; border-radius: 0; border-bottom: 1px solid rgba(226,232,240,.5); }
            .nav-mobile-menu .nav-link:last-child { border-bottom: none; }
        }
        /* hero */
        .hero { position: relative; min-height: 560px; display: flex; align-items: center; background: linear-gradient(135deg, rgba(15,23,42,.92), rgba(30,40,80,.82)), url('/assets/images/backpic/back-1.png') center/cover no-repeat; color: #fff; overflow: hidden; }
        .hero-content { z-index: 2; max-width: 720px; padding: 60px 0; }
        .hero h1 { font-size: 3rem; font-weight: 800; line-height: 1.2; letter-spacing: -0.03em; margin-bottom: 16px; }
        .hero p { font-size: 1.1rem; color: rgba(255,255,255,.85); margin-bottom: 28px; max-width: 560px; line-height: 1.7; }
        .hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero .hero-pattern { position: absolute; right: -80px; top: -60px; width: 380px; height: 380px; border-radius: 50%; background: rgba(59,130,246,.15); filter: blur(60px); }
        .hero .hero-pattern2 { position: absolute; right: 120px; bottom: -100px; width: 260px; height: 260px; border-radius: 50%; background: rgba(245,158,11,.12); filter: blur(50px); }
        /* buttons */
        .btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: 50px; font-size: .95rem; font-weight: 600; transition: var(--transition); cursor: pointer; }
        .btn-primary { background: var(--primary); color: #fff; box-shadow: 0 2px 12px rgba(30,64,175,.3); }
        .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(30,64,175,.4); }
        .btn-accent { background: var(--accent); color: #fff; box-shadow: 0 2px 12px rgba(245,158,11,.3); }
        .btn-accent:hover { background: #d97706; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(245,158,11,.4); }
        .btn-white { background: #fff; color: var(--text); box-shadow: var(--shadow); }
        .btn-white:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
        .btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
        .btn-outline:hover { background: var(--primary); color: #fff; }
        .btn-lg { padding: 15px 36px; font-size: 1rem; }
        /* stats */
        .stats-section { margin-top: -36px; position: relative; z-index: 3; }
        .stats-grid { display: grid; grid-template-columns: repeat(4,1fr); background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); overflow: hidden; }
        .stat-item { padding: 32px 20px; text-align: center; border-right: 1px solid var(--border); }
        .stat-item:last-child { border-right: none; }
        .stat-number { font-size: 2.1rem; font-weight: 800; color: var(--primary); line-height: 1.2; }
        .stat-label { font-size: .82rem; color: var(--text-light); margin-top: 6px; letter-spacing: .04em; }
        /* cards */
        .card { background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); border: 1px solid rgba(226,232,240,.6); transition: var(--transition); overflow: hidden; }
        .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .feature-card { padding: 32px 28px; }
        .feature-icon { width: 52px; height: 52px; border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 1.4rem; background: rgba(30,64,175,.08); color: var(--primary); margin-bottom: 18px; }
        .feature-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; color: var(--text); }
        .feature-card p { font-size: .9rem; color: var(--text-light); line-height: 1.6; }
        .feature-card:nth-child(even) .feature-icon { background: rgba(245,158,11,.1); color: var(--accent); }
        /* category cards */
        .category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .category-card { position: relative; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); background: var(--white); transition: var(--transition); }
        .category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
        .category-card img { width: 100%; height: 200px; object-fit: cover; }
        .category-card-body { padding: 24px; }
        .category-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
        .category-card p { font-size: .88rem; color: var(--text-light); line-height: 1.6; margin-bottom: 16px; }
        .category-card .card-link { font-size: .88rem; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
        /* post cards */
        .post-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
        .post-item { display: flex; gap: 20px; padding: 20px; background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow-sm); border: 1px solid rgba(226,232,240,.6); transition: var(--transition); }
        .post-item:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
        .post-item .post-thumb { width: 140px; height: 100px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; }
        .post-item h4 { font-size: 1rem; font-weight: 600; color: var(--text); line-height: 1.4; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .post-item p { font-size: .84rem; color: var(--text-light); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .post-item .post-meta { display: flex; gap: 12px; font-size: .78rem; color: var(--text-light); margin-top: 8px; }
        .post-item .post-tag { background: rgba(30,64,175,.08); color: var(--primary); padding: 2px 10px; border-radius: 50px; font-size: .75rem; font-weight: 600; }
        /* steps */
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
        .step-card { text-align: center; padding: 36px 20px; background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); position: relative; }
        .step-number { width: 44px; height: 44px; border-radius: 50%; background: var(--primary); color: #fff; font-weight: 700; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; font-size: 1.1rem; box-shadow: 0 4px 12px rgba(30,64,175,.25); }
        .step-card:nth-child(odd) .step-number { background: var(--accent); box-shadow: 0 4px 12px rgba(245,158,11,.25); }
        .step-card h4 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
        .step-card p { font-size: .85rem; color: var(--text-light); line-height: 1.5; }
        /* faq */
        .faq-wrap { max-width: 800px; margin: 0 auto; }
        .faq-item { background: var(--white); border-radius: var(--radius); border: 1px solid var(--border); margin-bottom: 14px; overflow: hidden; transition: var(--transition); }
        .faq-item:hover { border-color: rgba(30,64,175,.3); }
        .faq-q { padding: 20px 24px; font-weight: 600; font-size: .95rem; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
        .faq-q::after { content: '+'; font-size: 1.3rem; color: var(--primary-light); flex-shrink: 0; transition: transform .3s; }
        .faq-item.open .faq-q::after { transform: rotate(45deg); }
        .faq-a { padding: 0 24px; max-height: 0; overflow: hidden; transition: max-height .4s ease, padding .3s ease; }
        .faq-item.open .faq-a { padding: 0 24px 20px; max-height: 400px; }
        .faq-a p { font-size: .9rem; color: var(--text-light); line-height: 1.7; }
        /* cta */
        .cta-section { background: linear-gradient(135deg, var(--primary-dark), var(--primary)); border-radius: var(--radius-lg); padding: 60px 48px; text-align: center; color: #fff; position: relative; overflow: hidden; }
        .cta-section::before { content: ''; position: absolute; top: -40px; right: -40px; width: 200px; height: 200px; border-radius: 50%; background: rgba(255,255,255,.06); }
        .cta-section::after { content: ''; position: absolute; bottom: -60px; left: -60px; width: 220px; height: 220px; border-radius: 50%; background: rgba(245,158,11,.1); }
        .cta-section h2 { font-size: 1.9rem; font-weight: 700; margin-bottom: 12px; position: relative; z-index: 1; }
        .cta-section p { color: rgba(255,255,255,.85); margin-bottom: 28px; position: relative; z-index: 1; }
        /* footer */
        .site-footer { background: var(--dark-bg); color: rgba(255,255,255,.7); padding: 60px 0 24px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand .footer-logo { font-size: 1.2rem; font-weight: 700; color: #fff; display: flex; align-items: center; gap: 8px; margin-bottom: 14px; }
        .footer-brand p { font-size: .88rem; line-height: 1.7; color: rgba(255,255,255,.6); max-width: 260px; }
        .footer-col h4 { color: #fff; font-size: .95rem; font-weight: 600; margin-bottom: 18px; }
        .footer-col a { display: block; color: rgba(255,255,255,.6); font-size: .85rem; padding: 5px 0; transition: var(--transition); }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding-top: 20px; text-align: center; font-size: .82rem; color: rgba(255,255,255,.45); }
        /* responsive */
        @media (max-width: 1024px) {
            .feature-grid, .category-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .post-list { grid-template-columns: 1fr; }
            .section-title { font-size: 1.7rem; }
            .hero h1 { font-size: 2.4rem; }
        }
        @media (max-width: 768px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .stat-item { border-right: none; border-bottom: 1px solid var(--border); }
            .stat-item:nth-child(odd) { border-right: 1px solid var(--border); }
            .stat-item:nth-child(3n) { border-right: none; }
            .feature-grid, .category-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .cta-section { padding: 40px 24px; }
            .cta-section h2 { font-size: 1.5rem; }
        }
        @media (max-width: 520px) {
            .steps-grid { grid-template-columns: 1fr; }
            .post-item { flex-direction: column; }
            .post-item .post-thumb { width: 100%; height: 160px; }
            .section-title { font-size: 1.5rem; }
            .hero h1 { font-size: 1.8rem; }
            .container { padding: 0 16px; }
            .footer-grid { grid-template-columns: 1fr; }
        }
        /* focus states */
        a:focus, button:focus { outline: 3px solid rgba(30,64,175,.3); outline-offset: 2px; }
        .btn:focus { outline: 3px solid rgba(30,64,175,.35); }
        /* misc */
        .divider { width: 56px; height: 3px; background: var(--accent); border-radius: 3px; margin: 0 auto 16px; }

/* roulang page: category1 */
:root {
            --primary: #0f2452;
            --primary-light: #1d3a7d;
            --accent: #f5a623;
            --accent-dark: #d98e14;
            --bg: #f5f7fb;
            --bg-deep: #0b1a3a;
            --card: #ffffff;
            --text: #1c2340;
            --muted: #6b7a99;
            --border: #e6eaf2;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 10px 40px rgba(12, 28, 66, 0.08);
            --shadow-lg: 0 20px 60px rgba(12, 28, 66, 0.14);
            --container: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }

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

        button,
        input {
            font-family: inherit;
        }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 4px 24px rgba(12, 28, 66, 0.05);
        }

        .nav-wrap {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            position: relative;
        }

        .nav-group {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
        }

        .nav-group--left {
            justify-content: flex-start;
        }

        .nav-group--right {
            justify-content: flex-end;
        }

        .nav-link {
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: #4a5568;
            white-space: nowrap;
            transition: all 0.25s ease;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(15, 36, 82, 0.06);
        }

        .nav-link.active {
            color: var(--primary);
            background: rgba(15, 36, 82, 0.1);
            font-weight: 600;
        }

        .nav-center {
            display: flex;
            justify-content: center;
            flex-shrink: 0;
        }

        .nav-logo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.2px;
            padding: 4px 10px;
            border-radius: 8px;
            transition: opacity 0.25s ease;
        }

        .nav-logo:hover {
            opacity: 0.82;
        }

        .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent);
            display: inline-block;
            flex-shrink: 0;
            box-shadow: 0 0 0 4px rgba(245, 166, 35, 0.2);
        }

        .nav-mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border: 1px solid var(--border);
            border-radius: 10px;
            background: #fff;
            font-size: 18px;
            color: var(--primary);
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all 0.25s ease;
        }

        .nav-mobile-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .nav-mobile-menu {
            display: none;
            padding: 12px 20px 20px;
            background: #fff;
            border-top: 1px solid var(--border);
            box-shadow: 0 8px 30px rgba(12, 28, 66, 0.06);
            flex-direction: column;
            gap: 4px;
        }

        .nav-mobile-menu .nav-link {
            font-size: 16px;
            padding: 12px 16px;
            border-radius: 10px;
        }

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

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 96px 0 88px;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            color: #fff;
            overflow: hidden;
        }

        .page-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(11, 26, 58, 0.93) 0%, rgba(15, 36, 82, 0.78) 55%, rgba(22, 42, 88, 0.65) 100%);
            z-index: 1;
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 18px;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
        }

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

        .breadcrumb .sep {
            opacity: 0.5;
        }

        .banner-title {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 18px;
            max-width: 720px;
        }

        .banner-subtitle {
            font-size: 18px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.9);
            max-width: 620px;
            margin-bottom: 40px;
        }

        .banner-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            margin-top: 12px;
        }

        .banner-stat {
            padding: 20px 28px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: var(--radius);
            backdrop-filter: blur(6px);
            text-align: center;
            min-width: 140px;
        }

        .banner-stat .num {
            font-size: 30px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
            display: block;
        }

        .banner-stat .label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 4px;
        }

        /* ===== Sections ===== */
        .section {
            padding: 80px 0;
        }

        .section--alt {
            background: #fff;
        }

        .section--deep {
            background: var(--bg-deep);
            color: #fff;
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 52px;
        }

        .section-tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(245, 166, 35, 0.12);
            color: var(--accent-dark);
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 14px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--muted);
            line-height: 1.7;
        }

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

        .method-card {
            position: relative;
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 36px 24px 28px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }

        .method-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(245, 166, 35, 0.4);
        }

        .method-icon {
            width: 68px;
            height: 68px;
            margin: 0 auto 20px;
            border-radius: 20px;
            background: linear-gradient(135deg, #0f2452, #1d3a7d);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: #fff;
            box-shadow: 0 8px 24px rgba(15, 36, 82, 0.25);
        }

        .method-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

        .method-card p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.65;
        }

        .method-badge {
            position: absolute;
            top: 16px;
            right: 16px;
            padding: 4px 12px;
            background: var(--accent);
            color: #fff;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(245, 166, 35, 0.35);
        }

        /* ===== Steps / Timeline ===== */
        .steps-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            position: relative;
        }

        .steps-wrap::before {
            content: "";
            position: absolute;
            top: 44px;
            left: 8%;
            right: 8%;
            height: 2px;
            background: linear-gradient(90deg, var(--accent) 0%, rgba(245, 166, 35, 0.3) 100%);
            z-index: 0;
        }

        .step-item {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 0 8px;
        }

        .step-num {
            width: 88px;
            height: 88px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: #fff;
            border: 3px solid var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 30px;
            font-weight: 800;
            color: var(--primary);
            box-shadow: 0 8px 30px rgba(245, 166, 35, 0.2);
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--primary);
        }

        .step-item p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.65;
        }

        /* ===== Scene Cards ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        .scene-card {
            display: flex;
            gap: 22px;
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

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

        .scene-img {
            width: 150px;
            height: 112px;
            border-radius: 12px;
            object-fit: cover;
            flex-shrink: 0;
        }

        .scene-body {
            flex: 1;
        }

        .scene-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .scene-body p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.65;
        }

        .scene-body .scene-link {
            display: inline-block;
            margin-top: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            border-bottom: 2px solid rgba(245, 166, 35, 0.5);
            padding-bottom: 2px;
            transition: border-color 0.25s ease;
        }

        .scene-body .scene-link:hover {
            border-color: var(--accent);
        }

        /* ===== Issue List ===== */
        .issue-wrap {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
        }

        .issue-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 20px 22px;
            transition: box-shadow 0.3s ease, transform 0.3s ease;
        }

        .issue-item:hover {
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }

        .issue-rank {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: rgba(15, 36, 82, 0.06);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .issue-item:nth-child(1) .issue-rank {
            background: linear-gradient(135deg, var(--accent), #ffc34d);
            color: #fff;
        }

        .issue-item:nth-child(2) .issue-rank {
            background: linear-gradient(135deg, #1d3a7d, #3b5bb5);
            color: #fff;
        }

        .issue-body h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 4px;
        }

        .issue-body p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 22px 26px;
            box-shadow: 0 2px 12px rgba(12, 28, 66, 0.04);
            transition: box-shadow 0.3s ease;
        }

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

        .faq-item.active {
            border-color: rgba(245, 166, 35, 0.4);
        }

        .faq-q {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
        }

        .faq-q .faq-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(15, 36, 82, 0.05);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            flex-shrink: 0;
            transition: transform 0.3s ease, background 0.3s ease;
        }

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

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
            padding: 0;
        }

        .faq-item.active .faq-a {
            max-height: 300px;
            padding-top: 14px;
        }

        /* ===== CTA ===== */
        .cta-box {
            background: linear-gradient(135deg, #0f2452 0%, #1d3a7d 60%, #2a4a96 100%);
            border-radius: 24px;
            padding: 56px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: "";
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            background: rgba(245, 166, 35, 0.15);
            border-radius: 50%;
        }

        .cta-box::after {
            content: "";
            position: absolute;
            bottom: -80px;
            left: -80px;
            width: 220px;
            height: 220px;
            border: 2px solid rgba(255, 255, 255, 0.08);
            border-radius: 50%;
        }

        .cta-box h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }

        .cta-box p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 520px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 1;
        }

        .cta-btn {
            display: inline-block;
            padding: 14px 36px;
            background: var(--accent);
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            border-radius: 999px;
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.25);
            transition: all 0.3s ease;
            position: relative;
            z-index: 1;
            border: none;
            cursor: pointer;
        }

        .cta-btn:hover {
            background: #ffe08a;
            color: var(--primary);
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.3);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, 0.8);
            padding: 64px 0 0;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            margin-top: 16px;
            color: rgba(255, 255, 255, 0.6);
            max-width: 280px;
        }

        .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
        }

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

        .footer-col a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 6px 0;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            cursor: pointer;
            transition: color 0.25s ease, padding-left 0.25s ease;
        }

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

        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

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

            .steps-wrap {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px 24px;
            }

            .steps-wrap::before {
                display: none;
            }

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

            .banner-title {
                font-size: 36px;
            }
        }

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

            .nav-mobile-toggle {
                display: flex;
                margin-left: auto;
            }

            .nav-wrap {
                height: 64px;
                padding: 0 16px;
            }

            .nav-logo {
                font-size: 16px;
                position: absolute;
                left: 50%;
                transform: translateX(-50%);
            }

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

            .banner-title {
                font-size: 30px;
            }

            .banner-subtitle {
                font-size: 16px;
            }

            .banner-stats {
                gap: 14px;
            }

            .banner-stat {
                padding: 14px 18px;
                min-width: 100px;
            }

            .banner-stat .num {
                font-size: 22px;
            }

            .section {
                padding: 48px 0;
            }

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

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

            .method-grid,
            .scene-grid,
            .issue-wrap {
                grid-template-columns: 1fr;
            }

            .steps-wrap {
                grid-template-columns: 1fr;
                max-width: 360px;
                margin: 0 auto;
            }

            .scene-card {
                flex-direction: column;
            }

            .scene-img {
                width: 100%;
                height: 140px;
            }

            .cta-box {
                padding: 40px 24px;
            }

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

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

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

            .banner-title {
                font-size: 26px;
            }

            .banner-subtitle {
                font-size: 15px;
            }

            .banner-stat {
                padding: 12px 14px;
                min-width: 88px;
            }

            .banner-stat .num {
                font-size: 20px;
            }

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

            .method-card {
                padding: 28px 18px;
            }

            .faq-q {
                font-size: 15px;
            }

            .cta-box {
                padding: 32px 20px;
            }
        }

        /* focus for accessibility */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(245, 166, 35, 0.5);
            outline-offset: 2px;
        }

/* roulang page: article */
:root {
  --primary: #0f2b46;
  --primary-light: #1d3a5c;
  --primary-dark: #0a1f33;
  --accent: #c9a55c;
  --accent-hover: #b8944a;
  --accent-light: #f0e6d0;
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #1a2b3c;
  --text-muted: #5a6b7a;
  --border: #e5eaf0;
  --border-dark: #d0d8e0;
  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 12px rgba(15, 43, 70, 0.06);
  --shadow: 0 6px 30px rgba(15, 43, 70, 0.08);
  --shadow-lg: 0 20px 60px rgba(15, 43, 70, 0.12);
  --spacing-section: 96px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

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

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

button, input {
  font-family: inherit;
  outline: none;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section-padding {
  padding: 90px 0;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 20px rgba(15, 43, 70, 0.04);
}

.nav-wrap {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 24px;
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}

.nav-group--left {
  justify-content: flex-end;
}

.nav-group--right {
  justify-content: flex-start;
}

.nav-center {
  flex-shrink: 0;
  padding: 0 12px;
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  font-size: 21px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--primary);
  white-space: nowrap;
}

.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  margin-right: 9px;
  box-shadow: 0 0 0 3px rgba(201, 165, 92, 0.2);
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--primary);
  background: rgba(15, 43, 70, 0.05);
}

.nav-link.active {
  color: var(--accent);
  font-weight: 600;
  background: rgba(201, 165, 92, 0.1);
}

.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  color: var(--primary);
  padding: 8px;
  cursor: pointer;
  border-radius: var(--radius-sm);
}

.nav-mobile-menu {
  display: none;
  position: absolute;
  top: 78px;
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 16px 24px 24px;
  flex-direction: column;
  gap: 4px;
}

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

.nav-mobile-menu .nav-link {
  padding: 12px 16px;
  font-size: 16px;
  border-radius: var(--radius-sm);
}

.nav-mobile-menu .nav-link:hover {
  background: rgba(15, 43, 70, 0.05);
}

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  padding: 90px 0 100px;
  background: linear-gradient(135deg, rgba(10, 31, 51, 0.95), rgba(15, 43, 70, 0.82)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  color: #fff;
  border-bottom: 4px solid var(--accent);
}

.article-hero__container {
  position: relative;
  z-index: 2;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.8);
}

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

.breadcrumb i {
  font-size: 10px;
  opacity: 0.5;
}

.article-hero__content {
  max-width: 900px;
}

.category-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 6px 16px;
  border-radius: 50px;
  margin-bottom: 20px;
  box-shadow: 0 4px 14px rgba(201, 165, 92, 0.35);
}

.category-badge i {
  font-size: 11px;
}

.article-hero__content h1 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: 0.5px;
  margin-bottom: 20px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}

.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.article-meta i {
  color: var(--accent);
  font-size: 13px;
}

/* ===== Article Layout ===== */
.article-section {
  padding: 80px 0;
  background: var(--bg);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 48px;
  align-items: start;
}

.article-main {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  border: 1px solid var(--border);
}

.article-content {
  padding: 48px 52px;
  font-size: 16.5px;
  line-height: 1.9;
  color: #2a3b4c;
}

.article-content p {
  margin-bottom: 1.6em;
}

.article-content h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  margin: 2em 0 0.8em;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--accent-light);
}

.article-content h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--primary);
  margin: 1.8em 0 0.6em;
}

.article-content ul,
.article-content ol {
  margin: 0 0 1.6em 1.4em;
  padding-left: 0.4em;
}

.article-content ul li,
.article-content ol li {
  margin-bottom: 0.5em;
}

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

.article-content blockquote {
  border-left: 4px solid var(--accent);
  background: var(--accent-light);
  padding: 18px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 0 0 1.6em;
  color: var(--text);
  font-style: normal;
}

.article-content img {
  border-radius: var(--radius);
  margin: 1.8em 0;
  box-shadow: var(--shadow-sm);
}

.article-content a {
  color: var(--accent-hover);
  font-weight: 500;
  border-bottom: 1px solid transparent;
}

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

.article-content code {
  background: rgba(15, 43, 70, 0.06);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 0.9em;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

.article-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 52px;
  border-top: 1px solid var(--border);
  background: #fafbfd;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(15, 43, 70, 0.06);
  color: var(--primary);
  font-size: 13px;
  font-weight: 500;
  padding: 5px 14px;
  border-radius: 50px;
  transition: var(--transition);
  border: 1px solid transparent;
}

.tag:hover {
  background: rgba(15, 43, 70, 0.1);
  border-color: rgba(15, 43, 70, 0.1);
}

.tag i {
  color: var(--accent);
  font-size: 11px;
}

.article-share {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
}

.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(15, 43, 70, 0.06);
  color: var(--primary);
  font-size: 14px;
  transition: var(--transition);
}

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

/* ===== Sidebar ===== */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.sidebar-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
}

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

.sidebar-card__header {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  padding-bottom: 16px;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--accent-light);
}

.sidebar-card__header i {
  color: var(--accent);
  font-size: 15px;
}

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

.info-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 14px;
}

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

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

.info-list strong {
  color: var(--text);
  font-weight: 600;
}

.sidebar-cats {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-cats a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(15, 43, 70, 0.04);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  transition: var(--transition);
  border: 1px solid transparent;
}

.sidebar-cats a::after {
  content: "\f105";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 12px;
  color: var(--accent);
  transition: var(--transition);
}

.sidebar-cats a:hover {
  background: rgba(15, 43, 70, 0.07);
  border-color: var(--border);
  color: var(--primary);
  transform: translateX(4px);
}

.sidebar-cats a:hover::after {
  transform: translateX(2px);
}

.related-list {
  display: flex;
  flex-direction: column;
}

.related-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 13px 0;
  border-bottom: 1px dashed var(--border);
  transition: var(--transition);
}

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

.related-item__title {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-item__date {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.related-item__date::before {
  content: "\f073";
  font-family: "Font Awesome 6 Free";
  font-weight: 400;
  font-size: 10px;
  color: var(--accent);
}

.related-item:hover .related-item__title {
  color: var(--accent-hover);
}

.sidebar-card--cta {
  position: relative;
  background: linear-gradient(160deg, var(--primary), var(--primary-light));
  color: #fff;
  border: none;
  overflow: hidden;
}

.sidebar-card--cta::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(201, 165, 92, 0.2);
}

.sidebar-card__img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: 18px;
  box-shadow: var(--shadow-sm);
}

.sidebar-card--cta h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.sidebar-card--cta p {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 20px;
  line-height: 1.7;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 14.5px;
  font-weight: 600;
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  line-height: 1.4;
  text-align: center;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(15, 43, 70, 0.3);
}

.btn-primary:hover {
  background: var(--primary-light);
  box-shadow: 0 6px 22px rgba(15, 43, 70, 0.4);
  transform: translateY(-2px);
  color: #fff;
}

.btn-accent {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 16px rgba(201, 165, 92, 0.35);
}

.btn-accent:hover {
  background: var(--accent-hover);
  box-shadow: 0 6px 22px rgba(201, 165, 92, 0.45);
  transform: translateY(-2px);
  color: #fff;
}

.btn-light {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 4px 20px rgba(255, 255, 255, 0.15);
}

.btn-light:hover {
  background: var(--accent-light);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 26px rgba(0, 0, 0, 0.2);
}

.btn-block {
  width: 100%;
}

.btn:focus-visible,
.nav-link:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(201, 165, 92, 0.6);
  outline-offset: 2px;
}

/* ===== Not Found ===== */
.not-found {
  padding: 80px 48px;
  text-align: center;
}

.not-found i {
  font-size: 52px;
  color: var(--accent);
  margin-bottom: 20px;
  display: block;
}

.not-found h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}

.not-found p {
  color: var(--text-muted);
  margin-bottom: 32px;
}

/* ===== Related Cards ===== */
.related-articles {
  padding: 80px 0;
  background: #fff;
  border-top: 1px solid var(--border);
}

.section-heading {
  text-align: center;
  margin-bottom: 48px;
}

.section-tag {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent-hover);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  padding: 5px 18px;
  border-radius: 50px;
  margin-bottom: 14px;
  text-transform: uppercase;
}

.section-heading h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.3;
}

.section-heading p {
  color: var(--text-muted);
  margin-top: 12px;
  font-size: 15px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.related-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.related-card__img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  position: relative;
}

.related-card__content {
  padding: 28px 28px 30px;
}

.related-card__content h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
  line-height: 1.5;
}

.related-card__content p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-link {
  color: var(--accent-hover);
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.related-link i {
  font-size: 12px;
  transition: var(--transition);
}

.related-link:hover i {
  transform: translateX(4px);
}

/* ===== CTA Section ===== */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -80px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(201, 165, 92, 0.15);
}

.cta-section::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: -60px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(201, 165, 92, 0.1);
}

.cta-box {
  text-align: center;
  color: #fff;
  position: relative;
  z-index: 2;
}

.cta-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  border-radius: 50%;
  background: rgba(201, 165, 92, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--accent);
  border: 2px solid rgba(201, 165, 92, 0.4);
}

.cta-box h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 14px;
}

.cta-box p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 32px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== FAQ ===== */
.faq-section {
  padding: 90px 0;
  background: var(--bg);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  max-width: 1200px;
  margin: 0 auto;
}

.faq-item {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 30px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.faq-item:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
  border-color: rgba(201, 165, 92, 0.4);
}

.faq-item__q {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.faq-item__q i {
  color: var(--accent);
  font-size: 15px;
  flex-shrink: 0;
}

.faq-item__a {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ===== Footer ===== */
.site-footer {
  background: #0a1525;
  color: rgba(255, 255, 255, 0.7);
  padding-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
  display: flex;
  align-items: center;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}

.footer-brand p {
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.55);
  max-width: 320px;
  margin: 0;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 22px;
  letter-spacing: 0.5px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  padding: 6px 0;
  transition: var(--transition);
}

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

.footer-col a i {
  margin-right: 8px;
  color: var(--accent);
  font-size: 13px;
}

.footer-bottom {
  padding: 24px 0;
  text-align: center;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom p {
  margin: 0;
}

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

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

  .sidebar-card--cta {
    grid-column: span 2;
  }

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

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

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

@media (max-width: 768px) {
  :root {
    --spacing-section: 60px;
  }

  .nav-group {
    display: none;
  }

  .nav-mobile-toggle {
    display: block;
  }

  .nav-wrap {
    height: 66px;
    padding: 0 16px;
  }

  .nav-center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
  }

  .nav-logo {
    font-size: 17px;
  }

  .article-hero {
    padding: 60px 0 70px;
  }

  .article-hero__content h1 {
    font-size: 28px;
  }

  .article-meta {
    gap: 14px;
    font-size: 13px;
  }

  .article-content {
    padding: 32px 24px;
  }

  .article-footer {
    padding: 18px 24px;
  }

  .article-section {
    padding: 56px 0;
  }

  .related-articles {
    padding: 56px 0;
  }

  .cta-section {
    padding: 60px 0;
  }

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

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

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

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

  .sidebar-card--cta {
    grid-column: span 2;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
    padding-bottom: 40px;
  }

  .footer-brand p {
    max-width: 100%;
  }
}

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

  .article-layout {
    gap: 24px;
  }

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

  .sidebar-card--cta {
    grid-column: 1;
  }

  .article-content {
    padding: 24px 18px;
    font-size: 15.5px;
    line-height: 1.85;
  }

  .article-content h2 {
    font-size: 20px;
  }

  .article-footer {
    flex-direction: column;
    padding: 16px 18px;
    align-items: flex-start;
  }

  .article-share {
    width: 100%;
    justify-content: space-between;
  }

  .article-meta {
    flex-direction: column;
    gap: 8px;
  }
}

/* roulang page: category2 */
:root {
  --primary: #1e3a5f;
  --primary-light: #2d5a8e;
  --accent: #e8a13a;
  --accent-hover: #d4902e;
  --bg: #f5f7fb;
  --bg-alt: #eef1f6;
  --card: #ffffff;
  --text: #1e2a3a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 24px rgba(30, 58, 95, 0.08);
  --shadow-hover: 0 12px 36px rgba(30, 58, 95, 0.14);
  --transition: all 0.3s ease;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}
button {
  font-family: inherit;
  cursor: pointer;
}
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.7);
  box-shadow: 0 1px 12px rgba(30, 58, 95, 0.04);
}
.nav-wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  position: relative;
}
.nav-group {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  white-space: nowrap;
  transition: var(--transition);
}
.nav-link:hover {
  color: var(--primary);
  background: rgba(30, 58, 95, 0.06);
}
.nav-link.active {
  color: var(--primary);
  background: rgba(30, 58, 95, 0.1);
  font-weight: 600;
}
.nav-center {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  flex-shrink: 0;
  box-shadow: 0 0 0 4px rgba(232, 161, 58, 0.18);
}
.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 20px;
  color: var(--primary);
  padding: 8px;
  border-radius: 8px;
}
.nav-mobile-toggle:hover {
  background: rgba(30, 58, 95, 0.06);
}
.nav-mobile-menu {
  display: none;
  position: absolute;
  top: 72px;
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 12px 24px 20px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
  flex-direction: column;
  gap: 8px;
  z-index: 99;
}
.nav-mobile-menu.open {
  display: flex;
}
.nav-mobile-menu .nav-link {
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 15px;
  width: 100%;
}
.hero-banner {
  position: relative;
  background: linear-gradient(135deg, rgba(15, 37, 64, 0.92), rgba(30, 58, 95, 0.78)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff;
  padding: 110px 0 90px;
  overflow: hidden;
}
.hero-banner::after {
  content: '';
  position: absolute;
  bottom: -40px;
  right: -40px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: rgba(232, 161, 58, 0.15);
  filter: blur(60px);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 860px;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 6px 18px;
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 1px;
  backdrop-filter: blur(8px);
  margin-bottom: 28px;
}
.hero-title {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.hero-title span {
  color: var(--accent);
}
.hero-sub {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 36px;
  max-width: 720px;
}
.hero-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  transition: var(--transition);
  line-height: 1;
}
.btn-accent {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 20px rgba(232, 161, 58, 0.35);
}
.btn-accent:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(232, 161, 58, 0.45);
}
.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.5);
}
.btn-outline:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}
.section {
  padding: 90px 0;
}
.section--alt {
  background: var(--bg-alt);
}
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-tag {
  display: inline-block;
  background: rgba(232, 161, 58, 0.12);
  color: var(--accent-hover);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 999px;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.section-title {
  font-size: 34px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.35;
  margin-bottom: 16px;
}
.section-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.stat-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.stat-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: rgba(30, 58, 95, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  font-size: 22px;
  color: var(--primary);
}
.stat-num {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 14px;
  color: var(--text-muted);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  display: flex;
  gap: 20px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  align-items: flex-start;
}
.feature-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-color: rgba(232, 161, 58, 0.4);
}
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.feature-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}
.feature-body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
}
.process-wrap {
  max-width: 960px;
  margin: 0 auto;
  position: relative;
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
  z-index: 2;
}
.process-step {
  text-align: center;
  padding: 32px 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
}
.process-step:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  box-shadow: 0 4px 12px rgba(232, 161, 58, 0.35);
}
.step-icon {
  font-size: 26px;
  color: var(--primary);
  margin-bottom: 14px;
}
.step-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}
.step-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
}
.tips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  align-items: stretch;
}
.tips-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.tips-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.tips-img {
  height: 200px;
  overflow: hidden;
}
.tips-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.tips-card:hover .tips-img img {
  transform: scale(1.05);
}
.tips-body {
  padding: 28px 26px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.tips-body .tag {
  align-self: flex-start;
  margin-bottom: 12px;
  background: rgba(30, 58, 95, 0.08);
  color: var(--primary);
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.tips-body h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}
.tips-body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}
.tips-list {
  list-style: none;
  padding: 0;
  margin-top: 16px;
}
.tips-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-muted);
  padding: 5px 0;
  line-height: 1.6;
}
.tips-list li i {
  color: var(--accent);
  font-size: 13px;
  margin-top: 4px;
}
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover {
  border-color: rgba(232, 161, 58, 0.35);
}
.faq-question {
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  gap: 16px;
}
.faq-question i {
  color: var(--accent);
  font-size: 14px;
  transition: transform 0.3s;
  flex-shrink: 0;
}
.faq-item.active .faq-question i {
  transform: rotate(180deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-answer-inner {
  padding: 0 24px 22px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  border-top: 1px dashed var(--border);
  margin-top: 0;
  padding-top: 16px;
}
.faq-item.active .faq-answer {
  max-height: 300px;
}
.cta-section {
  background: linear-gradient(135deg, rgba(15, 37, 64, 0.95), rgba(30, 58, 95, 0.85)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  padding: 90px 0;
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -80px;
  left: 10%;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: rgba(232, 161, 58, 0.1);
  filter: blur(50px);
}
.cta-title {
  font-size: 34px;
  font-weight: 800;
  margin-bottom: 16px;
}
.cta-desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.8);
  max-width: 640px;
  margin: 0 auto 36px;
  line-height: 1.8;
}
.cta-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.site-footer {
  background: #12263a;
  color: #a8b8c8;
  padding: 70px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-logo {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  max-width: 320px;
  color: #8b9daf;
}
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: #8b9daf;
  padding: 5px 0;
  transition: var(--transition);
}
.footer-col a:hover {
  color: var(--accent);
  padding-left: 6px;
}
.footer-col a i {
  margin-right: 6px;
  font-size: 12px;
}
.footer-bottom {
  padding: 24px 0;
  text-align: center;
  font-size: 13px;
  color: #6a7f94;
}
.footer-bottom p {
  margin: 0;
}
@media (max-width: 1024px) {
  .nav-group--left, .nav-group--right {
    display: none;
  }
  .nav-mobile-toggle {
    display: inline-flex;
  }
  .nav-wrap {
    justify-content: space-between;
  }
  .nav-center {
    position: static;
    transform: none;
    margin: 0 auto;
  }
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 768px) {
  .hero-banner {
    padding: 70px 0 60px;
  }
  .hero-title {
    font-size: 30px;
  }
  .hero-sub {
    font-size: 16px;
  }
  .section {
    padding: 60px 0;
  }
  .section-title {
    font-size: 26px;
  }
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .features-grid,
  .tips-grid {
    grid-template-columns: 1fr;
  }
  .cta-title {
    font-size: 26px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .process-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 18px;
  }
  .nav-wrap {
    padding: 0 16px;
    height: 64px;
  }
  .nav-logo {
    font-size: 15px;
  }
  .hero-title {
    font-size: 24px;
  }
  .hero-btns {
    flex-direction: column;
    width: 100%;
  }
  .hero-btns .btn {
    width: 100%;
  }
  .feature-card {
    flex-direction: column;
    padding: 24px 20px;
  }
  .stat-card {
    padding: 24px 16px;
  }
  .faq-question {
    font-size: 14px;
    padding: 16px 16px;
  }
  .faq-answer-inner {
    padding: 0 16px 18px;
    font-size: 14px;
  }
}

/* roulang page: category3 */
:root {
  --primary: #16324f;
  --primary-light: #2a4d72;
  --accent: #e8b64c;
  --accent-light: #f3d27a;
  --bg: #f4f7fb;
  --white: #ffffff;
  --text: #1c2536;
  --muted: #6b7a8f;
  --border: #e3e9f0;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 12px 36px rgba(22, 50, 79, .08);
  --shadow-lg: 0 20px 50px rgba(22, 50, 79, .14);
  --transition: all .3s ease;
}
*, *::before, *::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
button {
  font-family: inherit;
}
h1, h2, h3, h4, h5 {
  line-height: 1.3;
  margin-top: 0;
}
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}
/* Header & Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(0,0,0,.04);
}
.nav-wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 74px;
  position: relative;
}
.nav-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1 1 0;
}
.nav-group--left {
  justify-content: flex-end;
}
.nav-group--right {
  justify-content: flex-start;
}
.nav-center {
  flex: 0 0 auto;
  padding: 0 16px;
}
.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: .5px;
  white-space: nowrap;
}
.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  flex-shrink: 0;
}
.nav-link {
  display: inline-block;
  padding: 8px 14px;
  font-size: .95rem;
  font-weight: 500;
  color: var(--text);
  border-radius: 8px;
  white-space: nowrap;
  transition: var(--transition);
}
.nav-link:hover {
  color: var(--primary);
  background: rgba(232,182,76,.12);
}
.nav-link.active {
  color: var(--primary);
  font-weight: 700;
  background: rgba(232,182,76,.18);
}
.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  color: var(--primary);
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
}
.nav-mobile-toggle:focus {
  outline: 2px solid var(--accent);
}
.nav-mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--white);
  border-top: 1px solid var(--border);
  padding: 12px 20px 16px;
}
.nav-mobile-menu .nav-link {
  padding: 12px 16px;
  border-radius: 10px;
  margin: 2px 0;
}
@media (max-width: 860px) {
  .nav-wrap {
    justify-content: space-between;
    padding: 0 16px;
  }
  .nav-group--left,
  .nav-group--right {
    display: none;
  }
  .nav-mobile-toggle {
    display: inline-flex;
  }
  .nav-center {
    padding: 0;
    flex: 1;
    text-align: left;
  }
  .nav-mobile-menu.open {
    display: flex;
  }
  .nav-logo {
    font-size: 1.12rem;
  }
}
/* Hero */
.page-hero {
  position: relative;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  padding: 88px 0 72px;
  color: var(--white);
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(22,50,79,.92), rgba(22,50,79,.65), rgba(232,182,76,.35));
  z-index: 1;
}
.page-hero .container {
  position: relative;
  z-index: 2;
}
.hero-breadcrumb {
  font-size: .9rem;
  opacity: .85;
  margin-bottom: 12px;
}
.hero-breadcrumb a {
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,.4);
  padding-bottom: 2px;
}
.hero-breadcrumb a:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.hero-title {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.hero-subtitle {
  font-size: 1.1rem;
  max-width: 640px;
  opacity: .92;
  margin-bottom: 30px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: .95rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}
.btn-accent {
  background: var(--accent);
  color: var(--primary);
  box-shadow: 0 6px 18px rgba(232,182,76,.4);
}
.btn-accent:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(232,182,76,.5);
}
.btn-outline-white {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,.65);
}
.btn-outline-white:hover {
  border-color: #fff;
  background: rgba(255,255,255,.12);
  transform: translateY(-2px);
}
/* Section common */
.section {
  padding: 80px 0;
}
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 50px;
}
.section-tag {
  display: inline-block;
  background: rgba(232,182,76,.15);
  color: #a87b1f;
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: 2px;
  padding: 6px 16px;
  border-radius: 40px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 16px;
}
.section-desc {
  color: var(--muted);
  font-size: 1.05rem;
}
/* Cards */
.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
  height: 100%;
}
.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: rgba(232,182,76,.4);
}
.card-icon {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--accent);
  margin-bottom: 16px;
}
.card-icon.gold {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: var(--primary);
}
.card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}
.card p {
  color: var(--muted);
  font-size: .93rem;
  margin-bottom: 0;
}
.card a.arrow {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 16px;
  font-weight: 600;
  font-size: .9rem;
  color: var(--primary);
}
.card a.arrow i {
  transition: transform .2s;
}
.card a.arrow:hover {
  color: var(--accent);
}
.card a.arrow:hover i {
  transform: translateX(4px);
}
/* Support Grid */
.support-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 1024px) {
  .support-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 520px) {
  .support-grid {
    grid-template-columns: 1fr;
  }
}
/* Article block */
.side-image {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  object-fit: cover;
  width: 100%;
  height: 100%;
  min-height: 300px;
}
.article-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.article-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 4px;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.article-item:last-child {
  border-bottom: none;
}
.article-item:hover {
  background: rgba(232,182,76,.06);
  border-radius: 10px;
  padding-left: 12px;
  padding-right: 12px;
}
.article-item .date-tag {
  font-size: .75rem;
  color: var(--muted);
  background: var(--bg);
  padding: 4px 8px;
  border-radius: 6px;
  flex-shrink: 0;
}
.article-item h4 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
}
.article-item h4 a:hover {
  color: var(--primary);
  text-decoration: underline;
}
/* Category blocks */
.cate-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.cate-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 24px;
  text-align: center;
  transition: var(--transition);
  height: 100%;
}
.cate-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
}
.cate-card .number {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}
.cate-card h3 {
  font-size: 1.1rem;
  color: var(--primary);
  margin-bottom: 8px;
}
.cate-card p {
  color: var(--muted);
  font-size: .88rem;
  margin-bottom: 18px;
}
.cate-card .tag-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
}
.tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--bg);
  border-radius: 20px;
  font-size: .78rem;
  color: var(--muted);
  border: 1px solid var(--border);
}
@media (max-width: 1024px) {
  .cate-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 520px) {
  .cate-grid {
    grid-template-columns: 1fr;
  }
}
/* Steps timeline */
.steps-wrap {
  display: flex;
  gap: 30px;
  justify-content: center;
  flex-wrap: wrap;
}
.step-item {
  flex: 1 1 180px;
  max-width: 220px;
  text-align: center;
  position: relative;
}
.step-item .step-num {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  background: var(--primary);
  color: var(--accent);
  border-radius: 50%;
  font-size: 1.3rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 20px rgba(22,50,79,.2);
}
.step-item h4 {
  font-size: 1.05rem;
  color: var(--primary);
}
.step-item p {
  font-size: .9rem;
  color: var(--muted);
}
.step-item::after {
  content: "\f054";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  position: absolute;
  top: 20px;
  right: -24px;
  color: var(--accent);
  font-size: 1rem;
}
.step-item:last-child::after {
  display: none;
}
@media (max-width: 768px) {
  .step-item::after {
    display: none;
  }
}
/* FAQ */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 26px;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--primary);
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary i {
  color: var(--accent);
  transition: transform .3s;
  font-size: 1.1rem;
}
.faq-item[open] summary i {
  transform: rotate(180deg);
}
.faq-item .faq-answer {
  padding: 0 26px 22px;
  color: var(--muted);
  font-size: .95rem;
}
/* CTA */
.cta-block {
  background: linear-gradient(120deg, var(--primary), var(--primary-light));
  border-radius: 28px;
  padding: 60px 40px;
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-block::after {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: rgba(232,182,76,.15);
  border-radius: 50%;
}
.cta-block h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 12px;
}
.cta-block p {
  opacity: .9;
  max-width: 560px;
  margin: 0 auto 28px;
}
/* Footer */
.site-footer {
  background: #14263a;
  color: #c5d0dc;
  padding: 60px 0 20px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #fff;
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: .9rem;
  line-height: 1.7;
  margin-bottom: 20px;
  max-width: 320px;
}
.footer-col h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  padding: 5px 0;
  color: #c5d0dc;
  font-size: .9rem;
}
.footer-col a:hover {
  color: var(--accent);
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 20px;
  text-align: center;
  font-size: .85rem;
  color: #8a9bad;
}
@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 520px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}
/* Responsive extra */
@media (max-width: 768px) {
  .page-hero {
    padding: 60px 0 50px;
  }
  .section {
    padding: 56px 0;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    justify-content: center;
  }
}
/* Focus accessibility */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}