/* roulang page: index */
:root {
  --primary: #1a3a5c;
  --primary-light: #2a5a8c;
  --primary-dark: #0f2440;
  --accent: #d4a84b;
  --accent-light: #e8c56e;
  --accent-dark: #b8892e;
  --bg-light: #f8f7f4;
  --bg-white: #ffffff;
  --bg-dark: #1a1a2e;
  --text-dark: #1e2a3a;
  --text-muted: #5a6a7a;
  --text-light: #f0ece4;
  --border-light: #e5e0d8;
  --border-accent: #d4a84b;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.1);
  --shadow-lg: 0 16px 50px rgba(0,0,0,0.14);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-base: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --max-width: 1200px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-base); color: var(--text-dark); background: var(--bg-light); line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text-dark); }
h1 { font-size: 2.8rem; letter-spacing: -0.02em; }
h2 { font-size: 2.2rem; margin-bottom: 0.5rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.2rem; }
p { margin-bottom: 1rem; color: var(--text-muted); }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 { position: relative; display: inline-block; }
.section-title h2::after { content: ''; display: block; width: 60px; height: 4px; background: var(--accent); margin: 12px auto 0; border-radius: 2px; }
.section-title p { max-width: 680px; margin: 12px auto 0; font-size: 1.1rem; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 36px; border-radius: var(--radius-sm); font-weight: 600; font-size: 1rem; border: none; cursor: pointer; transition: var(--transition); text-decoration: none; line-height: 1.2; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(26,58,92,0.3); }
.btn-primary:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(26,58,92,0.4); color: #fff; }
.btn-accent { background: var(--accent); color: var(--primary-dark); box-shadow: 0 4px 14px rgba(212,168,75,0.35); }
.btn-accent:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(212,168,75,0.45); color: var(--primary-dark); }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
.btn-lg { padding: 18px 48px; font-size: 1.1rem; border-radius: var(--radius-md); }
.card { background: var(--bg-white); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); padding: 32px; transition: var(--transition); border: 1px solid var(--border-light); }
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.badge { display: inline-block; padding: 4px 14px; border-radius: 20px; font-size: 0.8rem; font-weight: 600; background: var(--accent); color: var(--primary-dark); }
.tag { display: inline-block; padding: 4px 12px; border-radius: var(--radius-sm); font-size: 0.8rem; background: var(--bg-light); color: var(--text-muted); border: 1px solid var(--border-light); transition: var(--transition); }
.tag:hover { border-color: var(--accent); color: var(--primary); }
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }

/* ===== Header / Nav ===== */
.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background: rgba(255,255,255,0.92); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border-light); transition: var(--transition); }
.site-header .container { display: flex; align-items: center; justify-content: space-between; padding-top: 12px; padding-bottom: 12px; }
.site-logo { font-size: 1.6rem; font-weight: 800; color: var(--primary); letter-spacing: -0.02em; }
.site-logo span { color: var(--accent); }
.site-logo:hover { color: var(--primary); }
.nav-panel { display: flex; align-items: center; gap: 8px; background: var(--bg-light); padding: 6px 12px; border-radius: 50px; border: 1px solid var(--border-light); box-shadow: var(--shadow-sm); }
.nav-item { display: inline-flex; align-items: center; gap: 6px; padding: 8px 20px; border-radius: 40px; font-size: 0.9rem; font-weight: 500; color: var(--text-muted); transition: var(--transition); text-decoration: none; }
.nav-item i { font-size: 0.9rem; }
.nav-item:hover { background: var(--bg-white); color: var(--primary); box-shadow: var(--shadow-sm); }
.nav-item.active { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(26,58,92,0.25); }
.nav-cta { margin-left: 8px; }
.header-actions { display: flex; align-items: center; gap: 12px; }
.header-search { display: flex; align-items: center; background: var(--bg-light); border-radius: 40px; padding: 4px 16px 4px 20px; border: 1px solid var(--border-light); transition: var(--transition); }
.header-search:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(212,168,75,0.15); }
.header-search input { border: none; background: transparent; padding: 8px 4px; font-size: 0.9rem; outline: none; min-width: 120px; color: var(--text-dark); }
.header-search input::placeholder { color: var(--text-muted); }
.header-search button { background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 4px 8px; font-size: 0.9rem; transition: var(--transition); }
.header-search button:hover { color: var(--primary); }
.mobile-toggle { display: none; background: none; border: none; font-size: 1.6rem; color: var(--primary); cursor: pointer; padding: 4px 8px; }

/* ===== Hero ===== */
.hero { position: relative; padding: 160px 0 100px; background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%); overflow: hidden; min-height: 90vh; display: flex; align-items: center; }
.hero-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat; opacity: 0.12; mix-blend-mode: overlay; }
.hero-overlay { position: absolute; inset: 0; background: radial-gradient(ellipse at 30% 50%, rgba(212,168,75,0.08) 0%, transparent 70%); }
.hero .container { position: relative; z-index: 2; text-align: center; }
.hero-badge { display: inline-block; padding: 6px 24px; border-radius: 40px; background: rgba(212,168,75,0.18); color: var(--accent-light); font-size: 0.85rem; font-weight: 600; letter-spacing: 0.04em; margin-bottom: 24px; backdrop-filter: blur(4px); border: 1px solid rgba(212,168,75,0.2); }
.hero h1 { font-size: 3.6rem; font-weight: 800; color: #fff; line-height: 1.15; margin-bottom: 20px; letter-spacing: -0.03em; text-shadow: 0 2px 30px rgba(0,0,0,0.2); }
.hero h1 span { color: var(--accent); }
.hero p { font-size: 1.25rem; color: rgba(255,255,255,0.75); max-width: 680px; margin: 0 auto 36px; line-height: 1.8; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-stats { display: flex; justify-content: center; gap: 48px; margin-top: 60px; padding-top: 40px; border-top: 1px solid rgba(255,255,255,0.1); flex-wrap: wrap; }
.hero-stat { text-align: center; }
.hero-stat .num { font-size: 2.4rem; font-weight: 800; color: #fff; display: block; }
.hero-stat .label { font-size: 0.9rem; color: rgba(255,255,255,0.55); margin-top: 4px; }

/* ===== Services / Core ===== */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service-card { text-align: center; padding: 40px 28px; }
.service-card .icon { width: 64px; height: 64px; border-radius: 16px; background: var(--bg-light); display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; font-size: 1.8rem; color: var(--primary); transition: var(--transition); }
.service-card:hover .icon { background: var(--primary); color: #fff; transform: scale(1.05); }
.service-card h3 { margin-bottom: 12px; font-size: 1.25rem; }
.service-card p { font-size: 0.95rem; margin-bottom: 0; }

/* ===== Features / Advantages ===== */
.features { background: var(--bg-white); }
.features-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.feature-item { display: flex; gap: 20px; align-items: flex-start; padding: 28px; border-radius: var(--radius-md); background: var(--bg-light); border: 1px solid var(--border-light); transition: var(--transition); }
.feature-item:hover { box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.feature-item .icon { flex-shrink: 0; width: 48px; height: 48px; border-radius: 12px; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; }
.feature-item h4 { margin-bottom: 6px; font-size: 1.05rem; }
.feature-item p { font-size: 0.9rem; margin-bottom: 0; }

/* ===== Latest / CMS ===== */
.latest-section { background: var(--bg-light); }
.latest-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.post-card { background: var(--bg-white); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); transition: var(--transition); }
.post-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.post-card .thumb { width: 100%; height: 200px; background: var(--border-light); display: flex; align-items: center; justify-content: center; color: var(--text-muted); font-size: 2rem; overflow: hidden; }
.post-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.post-card .body { padding: 24px; }
.post-card .meta { display: flex; gap: 12px; align-items: center; font-size: 0.8rem; color: var(--text-muted); margin-bottom: 12px; }
.post-card .meta .cat { background: var(--accent); color: var(--primary-dark); padding: 2px 10px; border-radius: 12px; font-weight: 600; }
.post-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.post-card h3 a { color: var(--text-dark); }
.post-card h3 a:hover { color: var(--primary-light); }
.post-card p { font-size: 0.9rem; margin-bottom: 0; color: var(--text-muted); }
.post-empty { grid-column: 1 / -1; text-align: center; padding: 60px 20px; color: var(--text-muted); font-size: 1.1rem; background: var(--bg-white); border-radius: var(--radius-md); border: 1px dashed var(--border-light); }

/* ===== Process / Steps ===== */
.process { background: var(--bg-white); }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
.process-step { text-align: center; position: relative; }
.process-step .step-num { width: 48px; height: 48px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; font-weight: 700; margin: 0 auto 16px; position: relative; z-index: 2; }
.process-step::after { content: ''; position: absolute; top: 24px; left: 60%; width: 80%; height: 2px; background: var(--border-light); z-index: 1; }
.process-step:last-child::after { display: none; }
.process-step h4 { font-size: 1.05rem; margin-bottom: 8px; }
.process-step p { font-size: 0.9rem; margin-bottom: 0; }

/* ===== Testimonials / Social Proof ===== */
.testimonials { background: var(--bg-light); }
.testimonial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.testimonial-card { background: var(--bg-white); border-radius: var(--radius-md); padding: 32px; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); }
.testimonial-card .stars { color: var(--accent); font-size: 1rem; margin-bottom: 12px; }
.testimonial-card blockquote { font-size: 0.95rem; color: var(--text-muted); font-style: italic; margin-bottom: 16px; line-height: 1.7; }
.testimonial-card .author { display: flex; align-items: center; gap: 12px; }
.testimonial-card .author .avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--border-light); display: flex; align-items: center; justify-content: center; font-size: 1.2rem; color: var(--text-muted); }
.testimonial-card .author .name { font-weight: 600; font-size: 0.9rem; }
.testimonial-card .author .role { font-size: 0.8rem; color: var(--text-muted); }

/* ===== FAQ ===== */
.faq { background: var(--bg-white); }
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { border: 1px solid var(--border-light); border-radius: var(--radius-md); overflow: hidden; transition: var(--transition); }
.faq-item:hover { border-color: var(--accent); }
.faq-question { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; cursor: pointer; font-weight: 600; font-size: 1rem; background: var(--bg-light); transition: var(--transition); user-select: none; }
.faq-question:hover { background: var(--bg-white); }
.faq-question i { transition: var(--transition); color: var(--text-muted); font-size: 0.9rem; }
.faq-item.active .faq-question i { transform: rotate(180deg); color: var(--accent); }
.faq-answer { padding: 0 24px; max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; }
.faq-item.active .faq-answer { max-height: 400px; padding: 0 24px 20px; }
.faq-answer p { font-size: 0.95rem; margin-bottom: 0; padding-top: 8px; }

/* ===== CTA ===== */
.cta-section { background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%); padding: 80px 0; text-align: center; position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center/cover no-repeat; opacity: 0.06; mix-blend-mode: overlay; }
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 { color: #fff; font-size: 2.6rem; margin-bottom: 16px; }
.cta-section p { color: rgba(255,255,255,0.7); max-width: 600px; margin: 0 auto 32px; font-size: 1.1rem; }

/* ===== Footer ===== */
.site-footer { background: var(--bg-dark); color: rgba(255,255,255,0.6); padding: 60px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { font-size: 1.5rem; font-weight: 800; color: #fff; margin-bottom: 12px; display: block; }
.footer-brand .logo span { color: var(--accent); }
.footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.5); max-width: 320px; }
.footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; font-weight: 600; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { color: rgba(255,255,255,0.5); font-size: 0.9rem; transition: var(--transition); }
.footer-col ul li a:hover { color: var(--accent); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 24px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.85rem; }
.footer-bottom .copyright { color: rgba(255,255,255,0.4); }
.footer-bottom .links { display: flex; gap: 20px; }
.footer-bottom .links a { color: rgba(255,255,255,0.4); font-size: 0.85rem; }
.footer-bottom .links a:hover { color: var(--accent); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero h1 { font-size: 2.8rem; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .latest-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .process-step::after { display: none; }
  .testimonial-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .site-header .container { padding-top: 10px; padding-bottom: 10px; }
  .nav-panel { display: none; }
  .mobile-toggle { display: block; }
  .nav-panel.mobile-open { display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; width: 100%; background: var(--bg-white); border-radius: 0 0 var(--radius-md) var(--radius-md); padding: 16px 24px; box-shadow: var(--shadow-lg); gap: 6px; border-top: 1px solid var(--border-light); }
  .nav-panel.mobile-open .nav-item { width: 100%; justify-content: center; padding: 12px 20px; }
  .nav-panel.mobile-open .nav-cta { width: 100; margin-left: 0; margin-top: 6px; }
  .nav-panel.mobile-open .nav-cta .btn { width: 100%; justify-content: center; }
  .header-search { display: none; }
  .hero { padding: 120px 0 60px; min-height: auto; }
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; }
  .hero-stats { gap: 24px; }
  .hero-stat .num { font-size: 1.8rem; }
  .section { padding: 50px 0; }
  .services-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .latest-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-section h2 { font-size: 1.8rem; }
  .btn-lg { padding: 14px 32px; font-size: 1rem; }
  .section-title h2 { font-size: 1.6rem; }
}
@media (max-width: 520px) {
  .hero h1 { font-size: 1.6rem; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-actions .btn { width: 100%; max-width: 280px; justify-content: center; }
  .hero-stat .num { font-size: 1.4rem; }
  .container { padding: 0 16px; }
  .card { padding: 24px; }
}

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3c5e;
            --primary-light: #2a5a8a;
            --primary-dark: #0f263b;
            --accent: #c9a84c;
            --accent-light: #e0c06a;
            --accent-dark: #a8892e;
            --bg-light: #f7f6f2;
            --bg-white: #ffffff;
            --bg-dark: #1a1a2e;
            --text-dark: #1e1e1e;
            --text-body: #3a3a3a;
            --text-light: #6e6e6e;
            --text-white: #f5f5f0;
            --border: #e0ddd5;
            --border-light: #f0ede6;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --shadow-accent: 0 6px 24px rgba(201,168,76,0.25);
            --transition: all 0.3s cubic-bezier(0.25,0.46,0.45,0.94);
            --font-body: 'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,-apple-system,sans-serif;
            --font-heading: 'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,-apple-system,sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }
        html { scroll-behavior:smooth; font-size:16px; }
        body {
            font-family:var(--font-body);
            color:var(--text-body);
            background:var(--bg-light);
            line-height:1.7;
            -webkit-font-smoothing:antialiased;
        }
        img { max-width:100%; height:auto; display:block; }
        a { color:var(--primary); text-decoration:none; transition:var(--transition); }
        a:hover { color:var(--primary-light); }
        ul { list-style:none; padding:0; }
        .container { max-width:var(--max-width); margin:0 auto; padding:0 20px; width:100%; }

        /* ===== Typography ===== */
        h1,h2,h3,h4,h5,h6 { font-family:var(--font-heading); color:var(--text-dark); font-weight:700; line-height:1.3; }
        .section-title { font-size:2rem; text-align:center; margin-bottom:0.5rem; }
        .section-sub { text-align:center; color:var(--text-light); max-width:680px; margin:0 auto 2.5rem; font-size:1.05rem; }

        /* ===== Header & Nav ===== */
        .site-header {
            position:sticky; top:0; z-index:1000;
            background:rgba(26,60,94,0.96); backdrop-filter:blur(12px);
            border-bottom:1px solid rgba(255,255,255,0.06);
            height:var(--header-h); display:flex; align-items:center;
        }
        .header-inner {
            display:flex; align-items:center; justify-content:space-between;
            width:100%; max-width:var(--max-width); margin:0 auto; padding:0 20px;
        }
        .logo {
            font-size:1.5rem; font-weight:800; color:var(--text-white);
            letter-spacing:1px; display:flex; align-items:center; gap:4px;
        }
        .logo span { color:var(--accent); }
        .logo:hover { color:var(--text-white); opacity:0.92; }
        .nav-panel {
            display:flex; align-items:center; gap:6px;
            background:rgba(255,255,255,0.07);
            padding:4px 6px; border-radius:40px;
            backdrop-filter:blur(4px);
        }
        .nav-item {
            padding:8px 18px; border-radius:30px;
            font-size:0.9rem; font-weight:500; color:rgba(255,255,255,0.75);
            transition:var(--transition); display:flex; align-items:center; gap:6px;
            white-space:nowrap;
        }
        .nav-item i { font-size:0.85rem; }
        .nav-item:hover { background:rgba(255,255,255,0.12); color:#fff; }
        .nav-item.active { background:var(--accent); color:var(--primary-dark); font-weight:600; }
        .nav-cta { margin-left:8px; }
        .btn-accent {
            background:var(--accent); color:var(--primary-dark); font-weight:600;
            border-radius:30px; padding:10px 24px; font-size:0.85rem;
            transition:var(--transition); display:inline-flex; align-items:center; gap:6px;
            border:none; cursor:pointer;
        }
        .btn-accent:hover { background:var(--accent-light); transform:translateY(-1px); box-shadow:var(--shadow-accent); }
        .hamburger { display:none; background:none; border:none; color:#fff; font-size:1.6rem; cursor:pointer; padding:4px 8px; }

        /* ===== Hero / Banner ===== */
        .article-banner {
            position:relative;
            padding:80px 0 60px;
            background:linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            overflow:hidden;
            min-height:320px;
            display:flex; align-items:center;
        }
        .article-banner::before {
            content:''; position:absolute; inset:0;
            background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity:0.12; mix-blend-mode:overlay;
        }
        .article-banner .container { position:relative; z-index:2; }
        .article-banner .breadcrumb {
            display:flex; flex-wrap:wrap; gap:8px; align-items:center;
            font-size:0.85rem; color:rgba(255,255,255,0.6); margin-bottom:20px;
        }
        .article-banner .breadcrumb a { color:rgba(255,255,255,0.7); }
        .article-banner .breadcrumb a:hover { color:#fff; }
        .article-banner .breadcrumb .sep { color:rgba(255,255,255,0.35); }
        .article-banner h1 {
            font-size:2.4rem; color:#fff; max-width:840px;
            text-shadow:0 2px 20px rgba(0,0,0,0.2);
            line-height:1.3; margin-bottom:16px;
        }
        .article-meta {
            display:flex; flex-wrap:wrap; gap:16px 28px;
            color:rgba(255,255,255,0.7); font-size:0.9rem;
        }
        .article-meta i { margin-right:6px; color:var(--accent); }
        .article-meta .category-tag {
            display:inline-block; background:var(--accent); color:var(--primary-dark);
            padding:2px 14px; border-radius:20px; font-size:0.8rem; font-weight:600;
        }

        /* ===== Main Content ===== */
        .article-main {
            padding:48px 0 60px;
            background:var(--bg-light);
        }
        .article-layout {
            display:grid; grid-template-columns:1fr 320px; gap:40px;
            align-items:start;
        }
        .article-body {
            background:var(--bg-white); border-radius:var(--radius);
            padding:40px 44px;
            box-shadow:var(--shadow-sm);
            border:1px solid var(--border-light);
        }
        .article-body .content {
            font-size:1.05rem; line-height:1.9; color:var(--text-body);
        }
        .article-body .content p { margin-bottom:1.4em; }
        .article-body .content h2 { font-size:1.5rem; margin:2rem 0 1rem; padding-bottom:8px; border-bottom:2px solid var(--accent); }
        .article-body .content h3 { font-size:1.2rem; margin:1.6rem 0 0.8rem; }
        .article-body .content ul,.article-body .content ol { padding-left:1.5rem; margin-bottom:1.4em; }
        .article-body .content li { margin-bottom:0.4em; list-style:disc; }
        .article-body .content img { border-radius:var(--radius-sm); margin:1.6rem auto; box-shadow:var(--shadow-sm); }
        .article-body .content blockquote {
            border-left:4px solid var(--accent); background:var(--bg-light);
            padding:16px 24px; margin:1.6rem 0; border-radius:0 var(--radius-sm) var(--radius-sm) 0;
            font-style:italic; color:var(--text-light);
        }
        .article-not-found {
            text-align:center; padding:60px 20px;
        }
        .article-not-found i { font-size:3rem; color:var(--text-light); margin-bottom:16px; }
        .article-not-found h2 { font-size:1.6rem; margin-bottom:12px; }
        .article-not-found p { color:var(--text-light); margin-bottom:20px; }
        .btn-primary {
            display:inline-flex; align-items:center; gap:8px;
            background:var(--primary); color:#fff; padding:12px 30px;
            border-radius:30px; font-weight:600; transition:var(--transition);
            border:none; cursor:pointer; font-size:0.95rem;
        }
        .btn-primary:hover { background:var(--primary-light); transform:translateY(-2px); box-shadow:var(--shadow-md); color:#fff; }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display:flex; flex-direction:column; gap:28px;
        }
        .sidebar-card {
            background:var(--bg-white); border-radius:var(--radius);
            padding:28px 24px;
            box-shadow:var(--shadow-sm);
            border:1px solid var(--border-light);
        }
        .sidebar-card h3 {
            font-size:1.15rem; margin-bottom:16px; padding-bottom:10px;
            border-bottom:2px solid var(--accent); display:flex; align-items:center; gap:8px;
        }
        .sidebar-card h3 i { color:var(--accent); }
        .sidebar-list li {
            padding:10px 0; border-bottom:1px solid var(--border-light);
            display:flex; gap:12px; align-items:flex-start;
        }
        .sidebar-list li:last-child { border-bottom:none; }
        .sidebar-list li a { font-size:0.92rem; color:var(--text-body); line-height:1.4; }
        .sidebar-list li a:hover { color:var(--primary); }
        .sidebar-list .s-thumb {
            width:60px; height:60px; border-radius:var(--radius-sm);
            object-fit:cover; flex-shrink:0;
            background:var(--bg-light);
        }
        .sidebar-cta {
            background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);
            color:var(--text-white); text-align:center;
        }
        .sidebar-cta h3 { color:#fff; border-bottom-color:var(--accent); }
        .sidebar-cta p { color:rgba(255,255,255,0.8); font-size:0.92rem; margin-bottom:18px; }
        .sidebar-cta .btn-accent { width:100%; justify-content:center; }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding:60px 0;
            background:var(--bg-white);
            border-top:1px solid var(--border-light);
        }
        .faq-grid {
            display:grid; grid-template-columns:1fr 1fr; gap:16px;
            max-width:960px; margin:0 auto;
        }
        .faq-item {
            background:var(--bg-light); border-radius:var(--radius-sm);
            padding:18px 22px;
            border:1px solid var(--border-light);
            transition:var(--transition);
            cursor:pointer;
        }
        .faq-item:hover { border-color:var(--accent); box-shadow:var(--shadow-sm); }
        .faq-item .q { font-weight:600; color:var(--text-dark); margin-bottom:6px; display:flex; align-items:center; gap:8px; }
        .faq-item .q i { color:var(--accent); font-size:0.9rem; }
        .faq-item .a { font-size:0.92rem; color:var(--text-light); padding-left:22px; }

        /* ===== CTA ===== */
        .cta-section {
            padding:60px 0;
            background:linear-gradient(135deg,var(--primary-dark),var(--primary));
            text-align:center;
            position:relative; overflow:hidden;
        }
        .cta-section::before {
            content:''; position:absolute; inset:0;
            background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity:0.07; mix-blend-mode:overlay;
        }
        .cta-section .container { position:relative; z-index:2; }
        .cta-section h2 { color:#fff; font-size:2rem; margin-bottom:12px; }
        .cta-section p { color:rgba(255,255,255,0.8); max-width:600px; margin:0 auto 28px; font-size:1.05rem; }
        .cta-section .btn-accent { font-size:1rem; padding:14px 40px; }

        /* ===== Footer ===== */
        .site-footer {
            background:var(--bg-dark); color:rgba(255,255,255,0.7);
            padding:56px 0 0;
        }
        .footer-grid {
            display:grid; grid-template-columns:2fr 1fr 1fr 1.3fr; gap:36px;
            padding-bottom:40px; border-bottom:1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo { font-size:1.3rem; margin-bottom:14px; display:inline-block; }
        .footer-brand p { font-size:0.9rem; line-height:1.7; color:rgba(255,255,255,0.55); max-width:340px; }
        .footer-col h4 { color:#fff; font-size:1rem; margin-bottom:16px; font-weight:600; }
        .footer-col ul li { margin-bottom:10px; font-size:0.88rem; }
        .footer-col ul li a { color:rgba(255,255,255,0.6); }
        .footer-col ul li a:hover { color:var(--accent); }
        .footer-bottom {
            display:flex; justify-content:space-between; align-items:center;
            padding:20px 0; font-size:0.85rem;
            color:rgba(255,255,255,0.4);
            flex-wrap:wrap; gap:12px;
        }
        .footer-bottom .links { display:flex; gap:20px; }
        .footer-bottom .links a { color:rgba(255,255,255,0.4); font-size:0.82rem; }
        .footer-bottom .links a:hover { color:var(--accent); }

        /* ===== Responsive ===== */
        @media (max-width:1024px) {
            .article-layout { grid-template-columns:1fr; }
            .article-sidebar { display:grid; grid-template-columns:1fr 1fr; gap:20px; }
            .faq-grid { grid-template-columns:1fr; }
            .footer-grid { grid-template-columns:1fr 1fr; gap:30px; }
        }
        @media (max-width:768px) {
            :root { --header-h:64px; }
            .hamburger { display:block; }
            .nav-panel {
                display:none; position:absolute; top:var(--header-h); left:0; right:0;
                background:var(--primary-dark); flex-direction:column; padding:16px 20px;
                border-radius:0 0 var(--radius) var(--radius);
                box-shadow:var(--shadow-lg);
                gap:8px;
            }
            .nav-panel.open { display:flex; }
            .nav-item { padding:10px 16px; border-radius:8px; }
            .nav-cta { margin-left:0; margin-top:8px; }
            .article-banner { padding:50px 0 40px; min-height:240px; }
            .article-banner h1 { font-size:1.6rem; }
            .article-body { padding:24px 20px; }
            .article-sidebar { grid-template-columns:1fr; }
            .section-title { font-size:1.5rem; }
            .footer-grid { grid-template-columns:1fr; gap:24px; }
            .footer-bottom { flex-direction:column; text-align:center; }
        }
        @media (max-width:520px) {
            .article-banner h1 { font-size:1.3rem; }
            .article-meta { flex-direction:column; gap:8px; font-size:0.82rem; }
            .article-body .content { font-size:0.95rem; }
            .cta-section h2 { font-size:1.4rem; }
            .btn-accent { padding:8px 18px; font-size:0.8rem; }
        }

        /* ===== Print ===== */
        @media print {
            .site-header,.site-footer,.article-sidebar,.cta-section,.faq-section { display:none; }
            .article-banner { padding:20px 0; background:#fff; min-height:auto; }
            .article-banner h1 { color:var(--text-dark); }
            .article-body { box-shadow:none; border:none; padding:0; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2640;
            --accent: #e8a838;
            --accent-light: #f0c060;
            --accent-dark: #c88a20;
            --bg-light: #f8f9fb;
            --bg-white: #ffffff;
            --bg-dark: #0f2640;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-weak: #8a8aaa;
            --text-white: #ffffff;
            --border-color: #e0e4ec;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --section-gap: 80px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-light);
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media screen and (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Typography ===== */
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
        }
        h1 {
            font-size: 2.8rem;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 2.2rem;
            letter-spacing: -0.01em;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.15rem;
        }
        p {
            color: var(--text-secondary);
            margin-bottom: 1rem;
        }
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-title h2 {
            margin-bottom: 12px;
        }
        .section-title p {
            max-width: 680px;
            margin: 0 auto;
            font-size: 1.05rem;
        }

        @media screen and (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .section-title {
                margin-bottom: 32px;
            }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 30px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary);
            color: var(--text-white);
        }
        .btn-primary:hover {
            background: var(--primary-light);
            color: var(--text-white);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-accent {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .btn-accent:hover {
            background: var(--accent-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        .btn-white {
            background: var(--text-white);
            color: var(--primary);
        }
        .btn-white:hover {
            background: var(--bg-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-lg {
            padding: 16px 40px;
            font-size: 1.05rem;
        }
        .btn:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Badge ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(232, 168, 56, 0.15);
            color: var(--accent-dark);
            letter-spacing: 0.3px;
        }
        .badge-primary {
            background: rgba(26, 58, 92, 0.1);
            color: var(--primary);
        }
        .badge-white {
            background: rgba(255, 255, 255, 0.2);
            color: var(--text-white);
        }

        /* ===== Navigation ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 24px;
            max-width: var(--container-max);
            margin: 0 auto;
        }
        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 2px;
            letter-spacing: -0.3px;
        }
        .logo span {
            color: var(--accent);
        }
        .logo:hover {
            color: var(--primary);
        }
        .nav-panel {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: all var(--transition);
            background: transparent;
            border: none;
            cursor: pointer;
            text-decoration: none;
        }
        .nav-item i {
            font-size: 0.9rem;
            color: var(--text-weak);
            transition: color var(--transition);
        }
        .nav-item:hover {
            background: rgba(26, 58, 92, 0.06);
            color: var(--primary);
        }
        .nav-item:hover i {
            color: var(--primary-light);
        }
        .nav-item.active {
            background: var(--primary);
            color: var(--text-white);
            box-shadow: var(--shadow-sm);
        }
        .nav-item.active i {
            color: var(--text-white);
        }
        .nav-item.active:hover {
            background: var(--primary-light);
        }
        .nav-cta {
            margin-left: 12px;
        }
        .nav-cta .btn {
            padding: 8px 20px;
            font-size: 0.85rem;
        }
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            padding: 4px 8px;
        }
        @media screen and (max-width: 768px) {
            .header-inner {
                padding: 10px 16px;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .nav-panel {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 16px 20px 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-md);
                gap: 8px;
                border-radius: 0 0 var(--radius-md) var(--radius-md);
            }
            .nav-panel.open {
                display: flex;
            }
            .nav-item {
                width: 100%;
                padding: 12px 16px;
                font-size: 1rem;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                width: 100%;
            }
            .nav-cta .btn {
                width: 100%;
                justify-content: center;
                padding: 12px 20px;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 100px 0 90px;
            background: var(--primary-dark);
            color: var(--text-white);
            overflow: hidden;
            min-height: 480px;
            display: flex;
            align-items: center;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 38, 64, 0.85) 0%, rgba(26, 58, 92, 0.7) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .hero h1 {
            color: var(--text-white);
            font-size: 3rem;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
        }
        .hero p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.15rem;
            max-width: 700px;
            margin: 0 auto 30px;
            line-height: 1.8;
        }
        .hero .badge {
            margin-bottom: 20px;
            display: inline-block;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        @media screen and (max-width: 768px) {
            .hero {
                padding: 70px 0 60px;
                min-height: auto;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                max-width: 320px;
                justify-content: center;
            }
        }

        /* ===== Sections Common ===== */
        section {
            padding: var(--section-gap) 0;
        }
        .section-bg-light {
            background: var(--bg-light);
        }
        .section-bg-white {
            background: var(--bg-white);
        }
        .section-bg-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-bg-dark h2,
        .section-bg-dark h3,
        .section-bg-dark p {
            color: var(--text-white);
        }
        .section-bg-dark .text-weak {
            color: rgba(255, 255, 255, 0.6);
        }

        @media screen and (max-width: 768px) {
            section {
                padding: 50px 0;
            }
            :root {
                --section-gap: 50px;
            }
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px 24px 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .card-icon {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: rgba(26, 58, 92, 0.08);
            color: var(--primary);
            font-size: 1.4rem;
            margin-bottom: 16px;
            transition: background var(--transition);
        }
        .card:hover .card-icon {
            background: var(--primary);
            color: var(--text-white);
        }
        .card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }
        .card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }
        .card .badge {
            margin-bottom: 12px;
        }
        .card-img {
            border-radius: var(--radius-md) var(--radius-md) 0 0;
            width: 100%;
            height: 200px;
            object-fit: cover;
            margin: -28px -24px 20px -24px;
            width: calc(100% + 48px);
        }
        .card-img-top {
            border-radius: var(--radius-md) var(--radius-md) 0 0;
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        /* ===== Grid Helpers ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        @media screen and (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media screen and (max-width: 768px) {
            .grid-3,
            .grid-2,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ===== Feature Blocks ===== */
        .feature-block {
            display: flex;
            align-items: center;
            gap: 48px;
            padding: 20px 0;
        }
        .feature-block.reverse {
            flex-direction: row-reverse;
        }
        .feature-text {
            flex: 1;
        }
        .feature-text h3 {
            margin-bottom: 12px;
        }
        .feature-text p {
            margin-bottom: 16px;
        }
        .feature-img {
            flex: 1;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .feature-img img {
            width: 100%;
            height: 340px;
            object-fit: cover;
            display: block;
        }
        @media screen and (max-width: 768px) {
            .feature-block,
            .feature-block.reverse {
                flex-direction: column;
                gap: 24px;
            }
            .feature-img img {
                height: 220px;
            }
        }

        /* ===== Steps / Timeline ===== */
        .step-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px 20px 32px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
            margin: 0 auto 16px;
        }
        .step-item h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }
        @media screen and (max-width: 768px) {
            .step-list {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
        }
        @media screen and (max-width: 480px) {
            .step-list {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Scenarios ===== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .scenario-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            text-align: center;
        }
        .scenario-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .scenario-card i {
            font-size: 2.2rem;
            color: var(--accent);
            margin-bottom: 16px;
            display: block;
        }
        .scenario-card h4 {
            margin-bottom: 8px;
        }
        .scenario-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }
        @media screen and (max-width: 768px) {
            .scenario-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ===== Security Showcase ===== */
        .security-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .security-item {
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: all var(--transition);
        }
        .security-item:hover {
            background: rgba(255, 255, 255, 0.12);
            transform: translateY(-3px);
        }
        .security-item i {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 12px;
            display: block;
        }
        .security-item h4 {
            font-size: 1rem;
            margin-bottom: 6px;
            color: var(--text-white);
        }
        .security-item p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 0;
        }
        @media screen and (max-width: 768px) {
            .security-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
        }
        @media screen and (max-width: 480px) {
            .security-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            color: var(--text-primary);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(26, 58, 92, 0.03);
        }
        .faq-question i {
            color: var(--accent);
            font-size: 0.9rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }
        .faq-answer p {
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-dark);
            position: relative;
            overflow: hidden;
        }
        .cta-section .cta-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 80px 24px;
        }
        .cta-section h2 {
            color: var(--text-white);
            font-size: 2.2rem;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto 30px;
            font-size: 1.05rem;
        }
        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        @media screen and (max-width: 768px) {
            .cta-section .container {
                padding: 50px 16px;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-actions {
                flex-direction: column;
                align-items: center;
            }
            .cta-actions .btn {
                width: 100%;
                max-width: 300px;
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            color: var(--text-white);
            font-size: 1.4rem;
            margin-bottom: 12px;
            display: inline-block;
        }
        .footer-brand .logo span {
            color: var(--accent);
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom .copyright {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom .links {
            display: flex;
            gap: 20px;
        }
        .footer-bottom .links a {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition);
        }
        .footer-bottom .links a:hover {
            color: var(--accent);
        }
        @media screen and (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media screen and (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-20 {
            margin-top: 20px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .rounded-img {
            border-radius: var(--radius-md);
            overflow: hidden;
        }

        /* ===== Focus visible ===== */
        :focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Active link style ===== */
        .site-footer a:active {
            color: var(--accent-light);
        }

        /* ===== Hero overlay with back-2 fallback ===== */
        .hero-bg-fallback {
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
        }