/* roulang page: index */
:root {
  --primary: #1a56db;
  --primary-dark: #1e3a8a;
  --primary-light: #dbeafe;
  --accent: #f59e0b;
  --accent-light: #fef3c7;
  --dark: #0f172a;
  --dark-2: #1e293b;
  --bg: #f8fafc;
  --bg-white: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
  --shadow: 0 6px 30px rgba(0,0,0,0.08);
  --shadow-lg: 0 16px 50px rgba(0,0,0,0.12);
  --transition: all 0.3s ease;
  --container: 1200px;
}
*, *::before, *::after { 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", sans-serif;
  font-size: 16px; line-height: 1.7; color: var(--text); background: var(--bg);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button, input, select { font-family: inherit; font-size: inherit; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 28px; border-radius: var(--radius-sm); font-weight: 600; font-size: 15px;
  border: 2px solid transparent; cursor: pointer; transition: var(--transition); line-height: 1.4;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 16px rgba(26, 86, 219, 0.3); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(26, 86, 219, 0.4); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary-light); transform: translateY(-2px); }
.btn-ghost { background: rgba(255,255,255,0.15); color: #fff; border-color: rgba(255,255,255,0.4); backdrop-filter: blur(4px); }
.btn-ghost:hover { background: rgba(255,255,255,0.28); transform: translateY(-2px); }
.btn-accent { background: var(--accent); color: #1e293b; box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3); }
.btn-accent:hover { background: #d97706; color: #fff; transform: translateY(-2px); }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn:focus-visible, a:focus-visible, button:focus-visible { outline: 3px solid rgba(26,86,219,0.35); outline-offset: 2px; }
.section { padding: 80px 0; }
.section-alt { background: var(--bg-white); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 50px; }
.section-head .tag-badge {
  display: inline-block; background: var(--primary-light); color: var(--primary);
  padding: 6px 16px; border-radius: 100px; font-size: 13px; font-weight: 600; letter-spacing: 1px;
  margin-bottom: 14px; text-transform: uppercase;
}
.section-head h2 { font-size: 34px; font-weight: 800; color: var(--dark); line-height: 1.3; margin-bottom: 14px; }
.section-head p { color: var(--text-muted); font-size: 16px; }
.site-header {
  position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px); border-bottom: 1px solid rgba(226,232,240,0.8); box-shadow: 0 2px 20px rgba(0,0,0,0.04);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 20px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; color: var(--dark); white-space: nowrap; }
.brand-icon { width: 36px; height: 36px; background: var(--primary); border-radius: 10px; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 16px; flex-shrink: 0; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
  padding: 8px 16px; border-radius: 8px; font-weight: 500; font-size: 15px; color: var(--text);
  transition: var(--transition); position: relative;
}
.nav-link:hover { background: var(--primary-light); color: var(--primary); }
.nav-link.active { background: var(--primary); color: #fff; font-weight: 600; }
.header-actions { display: flex; align-items: center; gap: 12px; }
.nav-toggle { display: none; background: none; border: 0; font-size: 24px; color: var(--dark); cursor: pointer; padding: 8px; }
.hero {
  position: relative; padding: 120px 0 140px; overflow: hidden;
  background: linear-gradient(135deg, #0f172a 0%, #1a56db 70%, #1e3a8a 100%);
}
.hero-bg { position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-1.png'); background-size: cover; background-position: center; opacity: 0.45; }
.hero-bg::after { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(15,23,42,0.85) 0%, rgba(26,86,219,0.35) 60%, rgba(30,58,138,0.2) 100%); }
.hero-content { position: relative; z-index: 2; max-width: 680px; color: #fff; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3); padding: 7px 18px; border-radius: 100px;
  font-size: 13px; font-weight: 600; letter-spacing: 1px; backdrop-filter: blur(6px);
}
.hero h1 { font-size: 48px; font-weight: 900; line-height: 1.2; margin: 20px 0 18px; }
.hero p { font-size: 17px; line-height: 1.8; color: rgba(255,255,255,0.85); margin-bottom: 32px; }
.hero-buttons { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 36px; margin-top: 48px; padding-top: 36px; border-top: 1px solid rgba(255,255,255,0.2); }
.hero-stat { color: #fff; }
.hero-stat strong { display: block; font-size: 30px; font-weight: 800; line-height: 1.3; }
.hero-stat span { font-size: 13px; color: rgba(255,255,255,0.7); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card {
  background: var(--bg-white); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 36px 30px; text-align: center; transition: var(--transition);
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
.feature-icon {
  width: 64px; height: 64px; margin: 0 auto 20px; border-radius: 18px;
  background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 24px;
}
.feature-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; color: var(--dark); }
.feature-card p { color: var(--text-muted); font-size: 14.5px; line-height: 1.7; }
.category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.category-card {
  position: relative; border-radius: var(--radius-lg); overflow: hidden; background: var(--bg-white);
  border: 1px solid var(--border); box-shadow: var(--shadow-sm); transition: var(--transition); display: block;
}
.category-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.category-card-media { position: relative; height: 200px; overflow: hidden; }
.category-card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.category-card:hover .category-card-media img { transform: scale(1.06); }
.category-card-media::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to top, rgba(15,23,42,0.55), transparent 60%); }
.category-card-body { padding: 24px 26px 28px; }
.category-card-body h3 { font-size: 20px; font-weight: 700; margin-bottom: 8px; color: var(--dark); }
.category-card-body p { color: var(--text-muted); font-size: 14.5px; line-height: 1.6; margin-bottom: 16px; }
.category-more { color: var(--primary); font-weight: 600; font-size: 14px; display: inline-flex; align-items: center; gap: 6px; transition: var(--transition); }
.category-more:hover { gap: 11px; }
.news-section { background: var(--bg-white); }
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px 32px; }
.news-item {
  display: flex; align-items: center; gap: 14px; padding: 18px 20px;
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-sm);
  transition: var(--transition);
}
.news-item:hover { background: var(--primary-light); border-color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.news-badge {
  flex-shrink: 0; padding: 4px 12px; background: var(--accent-light); color: #b45309;
  border-radius: 100px; font-size: 12px; font-weight: 600; white-space: nowrap;
}
.news-item a { flex: 1; font-weight: 500; color: var(--text); transition: var(--transition); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.news-item a:hover { color: var(--primary); }
.news-date { flex-shrink: 0; font-size: 13px; color: var(--text-muted); }
.empty-tip { text-align: center; padding: 40px; color: var(--text-muted); grid-column: 1 / -1; }
.stats-band {
  background: linear-gradient(120deg, var(--dark) 0%, var(--primary-dark) 100%);
  padding: 60px 0; position: relative; overflow: hidden;
}
.stats-band::before { content: ''; position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; opacity: 0.12; }
.stats-inner { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; text-align: center; }
.stat-block { color: #fff; }
.stat-block strong { display: block; font-size: 42px; font-weight: 800; line-height: 1.3; }
.stat-block span { font-size: 14px; color: rgba(255,255,255,0.75); }
.flow-section { background: var(--bg); }
.flow-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; counter-reset: flow; }
.flow-card { background: var(--bg-white); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; position: relative; transition: var(--transition); }
.flow-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.flow-num { font-size: 13px; font-weight: 700; background: var(--primary); color: #fff; width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.flow-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.flow-card p { color: var(--text-muted); font-size: 14px; line-height: 1.7; }
.faq-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.faq-item { background: var(--bg-white); border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; transition: var(--transition); }
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-item summary { padding: 20px 24px; cursor: pointer; font-weight: 600; font-size: 16px; color: var(--dark); display: flex; justify-content: space-between; align-items: center; transition: var(--transition); }
.faq-item summary:hover { background: var(--primary-light); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '\f078'; font-family: 'Font Awesome 6 Free'; font-weight: 900; font-size: 14px; color: var(--text-muted); transition: var(--transition); }
.faq-item[open] summary::after { transform: rotate(180deg); color: var(--primary); }
.faq-item .answer { padding: 0 24px 20px; color: var(--text-muted); font-size: 15px; line-height: 1.8; }
.cta-band {
  position: relative; padding: 80px 0; text-align: center; overflow: hidden;
  background: linear-gradient(120deg, var(--primary) 0%, var(--primary-dark) 100%);
}
.cta-band::before { content: ''; position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-3.png'); background-size: cover; background-position: center; opacity: 0.15; }
.cta-content { position: relative; z-index: 2; max-width: 640px; margin: 0 auto; }
.cta-content h2 { color: #fff; font-size: 36px; font-weight: 800; margin-bottom: 14px; }
.cta-content p { color: rgba(255,255,255,0.8); margin-bottom: 30px; font-size: 16px; }
.cta-buttons { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.site-footer { background: var(--dark); color: rgba(255,255,255,0.7); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-brand .brand { color: #fff; margin-bottom: 14px; }
.footer-brand p { font-size: 14px; line-height: 1.8; max-width: 300px; }
.footer-col h4 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { font-size: 14px; transition: var(--transition); }
.footer-col ul a:hover { color: var(--accent); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0; text-align: center; font-size: 13px; color: rgba(255,255,255,0.4); }
@media (max-width: 1024px) {
  .section { padding: 60px 0; }
  .hero { padding: 90px 0 110px; }
  .hero h1 { font-size: 38px; }
  .feature-grid, .category-grid { grid-template-columns: repeat(2, 1fr); }
  .flow-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .main-nav {
    position: fixed; top: 72px; left: 0; right: 0; background: #fff;
    flex-direction: column; padding: 16px 24px; gap: 8px; border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg); transform: translateY(-130%); transition: transform 0.3s ease;
  }
  .main-nav.open { transform: translateY(0); }
  .nav-link { width: 100%; text-align: center; padding: 12px; }
  .nav-toggle { display: block; }
  .header-actions .btn { display: none; }
  .hero { padding: 70px 0 80px; }
  .hero h1 { font-size: 30px; }
  .hero p { font-size: 15px; }
  .hero-stats { flex-wrap: wrap; gap: 20px; }
  .hero-stat { flex: 1 1 45%; }
  .feature-grid, .category-grid, .news-grid { grid-template-columns: 1fr; }
  .flow-grid { grid-template-columns: 1fr; }
  .stats-inner { gap: 20px; }
  .stat-block strong { font-size: 32px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .section-head h2 { font-size: 26px; }
}
@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .header-inner { height: 64px; }
  .main-nav { top: 64px; }
  .brand { font-size: 17px; }
  .brand-icon { width: 30px; height: 30px; font-size: 13px; }
  .hero { padding: 54px 0 70px; }
  .hero h1 { font-size: 25px; }
  .hero p { font-size: 14px; }
  .hero-buttons .btn { padding: 10px 20px; font-size: 14px; }
  .feature-grid, .category-grid, .news-grid, .flow-grid, .stats-inner { grid-template-columns: 1fr; }
  .feature-card, .flow-card { padding: 24px 20px; }
  .btn { padding: 10px 20px; font-size: 14px; }
}

/* roulang page: category1 */
:root {
            --primary: #1e3a8a;
            --primary-dark: #172554;
            --primary-light: #3b5bdb;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --bg: #f8fafc;
            --bg-alt: #f1f5f9;
            --text: #0f172a;
            --text-light: #64748b;
            --border: #e2e8f0;
            --white: #ffffff;
            --radius: 14px;
            --radius-lg: 22px;
            --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.06);
            --shadow: 0 10px 32px rgba(15, 23, 42, 0.10);
            --shadow-lg: 0 20px 55px rgba(15, 23, 42, 0.16);
            --transition: 0.3s ease;
            --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        input {
            font-family: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 18px rgba(15, 23, 42, 0.05);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
            gap: 24px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: 0.3px;
            white-space: nowrap;
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            font-size: 17px;
            flex-shrink: 0;
        }

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

        .main-nav .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 9px 17px;
            border-radius: 999px;
            font-size: 14.5px;
            font-weight: 600;
            color: var(--text-light);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .main-nav .nav-link:hover {
            color: var(--primary);
            background: rgba(30, 58, 138, 0.07);
        }

        .main-nav .nav-link.active {
            color: var(--white);
            background: var(--primary);
            box-shadow: 0 6px 18px rgba(30, 58, 138, 0.28);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 700;
            border-radius: 999px;
            transition: all var(--transition);
            font-size: 15px;
            padding: 12px 28px;
            border: 2px solid transparent;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 20px rgba(30, 58, 138, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(30, 58, 138, 0.32);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(30, 58, 138, 0.2);
        }

        .btn-outline {
            border-color: var(--primary);
            color: var(--primary);
            background: transparent;
        }

        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
        }

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

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

        .btn-sm {
            padding: 8px 20px;
            font-size: 14px;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(245, 158, 11, 0.55);
            outline-offset: 2px;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--bg-alt);
            color: var(--text);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            transition: background var(--transition);
        }

        .nav-toggle:hover {
            background: var(--border);
        }

        /* ===== Hero Banner ===== */
        .page-hero {
            position: relative;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 110px 0 96px;
            isolation: isolate;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(15, 23, 42, 0.88) 0%, rgba(23, 37, 84, 0.78) 45%, rgba(30, 58, 138, 0.55) 100%);
            z-index: -1;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 13.5px;
            font-weight: 600;
            letter-spacing: 0.6px;
            backdrop-filter: blur(6px);
            margin-bottom: 24px;
        }

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

        .page-hero h1 {
            font-size: 44px;
            line-height: 1.25;
            font-weight: 800;
            color: #fff;
            max-width: 720px;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

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

        .hero-desc {
            font-size: 17px;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.86);
            max-width: 640px;
            margin-bottom: 34px;
        }

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

        .hero-meta {
            display: flex;
            gap: 28px;
            margin-top: 52px;
            flex-wrap: wrap;
        }

        .hero-meta-item {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.92);
            font-size: 14px;
            font-weight: 500;
        }

        .hero-meta-item i {
            color: var(--accent);
            font-size: 16px;
        }

        /* ===== Stats Bar ===== */
        .stats-bar {
            background: var(--white);
            border-bottom: 1px solid var(--border);
            padding: 40px 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .stat-item {
            text-align: center;
            padding: 8px 12px;
        }

        .stat-num {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -1px;
        }

        .stat-label {
            font-size: 14.5px;
            color: var(--text-light);
            margin-top: 6px;
            font-weight: 500;
        }

        /* ===== Page Intro ===== */
        .section {
            padding: 96px 0;
        }

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

        .section-head {
            max-width: 760px;
            margin: 0 auto 54px;
            text-align: center;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            background: rgba(30, 58, 138, 0.08);
            border-radius: 999px;
            padding: 6px 16px;
            letter-spacing: 1.2px;
            text-transform: uppercase;
            margin-bottom: 16px;
        }

        .section-head h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.3;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.75;
        }

        .intro-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .intro-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }

        .intro-img img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .intro-img:hover img {
            transform: scale(1.04);
        }

        .intro-content h3 {
            font-size: 27px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 18px;
        }

        .intro-content p {
            font-size: 15.5px;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .intro-list {
            margin-top: 22px;
            display: grid;
            gap: 14px;
        }

        .intro-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            padding: 13px 16px;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .intro-list li:hover {
            border-color: rgba(30, 58, 138, 0.25);
            box-shadow: var(--shadow);
            transform: translateX(4px);
        }

        .intro-list li i {
            color: var(--accent);
            font-size: 17px;
            margin-top: 2px;
        }

        /* ===== Access Method Cards ===== */
        .method-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .method-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .method-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(30, 58, 138, 0.2);
        }

        .method-card-img {
            height: 190px;
            overflow: hidden;
            position: relative;
        }

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

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

        .method-card-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, 0.35), transparent 60%);
        }

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

        .method-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 46px;
            height: 46px;
            border-radius: 13px;
            background: rgba(30, 58, 138, 0.09);
            color: var(--primary);
            font-size: 19px;
            margin-bottom: 16px;
        }

        .method-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }

        .method-card p {
            font-size: 14.5px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }

        .method-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 12.5px;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 999px;
            background: var(--bg-alt);
            color: var(--text-light);
            border: 1px solid var(--border);
        }

        .tag.accent {
            background: rgba(245, 158, 11, 0.12);
            color: var(--accent-dark);
            border-color: rgba(245, 158, 11, 0.25);
        }

        /* ===== Step Timeline ===== */
        .timeline-wrap {
            max-width: 860px;
            margin: 0 auto;
            position: relative;
            padding-left: 30px;
        }

        .timeline-wrap::before {
            content: "";
            position: absolute;
            left: 0;
            top: 12px;
            bottom: 12px;
            width: 3px;
            border-radius: 3px;
            background: linear-gradient(to bottom, var(--primary), var(--accent));
            opacity: 0.35;
        }

        .step-item {
            position: relative;
            padding: 0 0 40px 36px;
        }

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

        .step-num {
            position: absolute;
            left: -30px;
            top: 0;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--white);
            border: 3px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
            box-shadow: 0 0 0 6px rgba(30, 58, 138, 0.08);
        }

        .step-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px 30px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .step-card:hover {
            box-shadow: var(--shadow);
            border-color: rgba(30, 58, 138, 0.18);
        }

        .step-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }

        .step-card p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.75;
        }

        .step-card .step-hint {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 14px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-dark);
            background: rgba(245, 158, 11, 0.1);
            padding: 5px 14px;
            border-radius: 999px;
        }

        /* ===== Security Notice ===== */
        .notice-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }

        .notice-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 34px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            display: flex;
            gap: 22px;
            transition: all var(--transition);
        }

        .notice-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }

        .notice-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            flex-shrink: 0;
            background: rgba(30, 58, 138, 0.08);
            color: var(--primary);
        }

        .notice-card:nth-child(2) .notice-icon {
            background: rgba(245, 158, 11, 0.12);
            color: var(--accent-dark);
        }

        .notice-card:nth-child(3) .notice-icon {
            background: rgba(16, 185, 129, 0.12);
            color: #059669;
        }

        .notice-card:nth-child(4) .notice-icon {
            background: rgba(139, 92, 246, 0.12);
            color: #7c3aed;
        }

        .notice-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }

        .notice-body p {
            font-size: 14.5px;
            color: var(--text-light);
            line-height: 1.75;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
            display: grid;
            gap: 16px;
        }

        .faq-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }

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

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            padding: 22px 26px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            list-style: none;
            transition: background var(--transition);
            user-select: none;
        }

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

        .faq-item summary:hover {
            background: rgba(30, 58, 138, 0.03);
        }

        .faq-item summary .faq-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: rgba(30, 58, 138, 0.08);
            color: var(--primary);
            font-size: 14px;
            transition: all var(--transition);
            flex-shrink: 0;
        }

        .faq-item[open] summary .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer {
            padding: 0 26px 24px;
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.8;
            border-top: 1px dashed var(--border);
            margin: 0 26px;
            padding: 18px 0 24px;
        }

        .faq-answer strong {
            color: var(--text);
            font-weight: 600;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(120deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            top: -60px;
            right: -40px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            border: 2px solid rgba(255, 255, 255, 0.1);
        }

        .cta-section::after {
            content: "";
            position: absolute;
            bottom: -80px;
            left: -60px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            border: 2px solid rgba(255, 255, 255, 0.08);
        }

        .cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .cta-inner p {
            font-size: 16.5px;
            color: rgba(255, 255, 255, 0.82);
            margin-bottom: 34px;
            line-height: 1.75;
        }

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

        .btn-light {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
        }

        .btn-light:hover {
            background: rgba(255, 255, 255, 0.9);
            transform: translateY(-2px);
            box-shadow: 0 12px 34px rgba(0, 0, 0, 0.24);
        }

        .btn-ghost {
            border: 2px solid rgba(255, 255, 255, 0.6);
            color: #fff;
            background: transparent;
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 70px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 44px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        }

        .footer-brand .brand {
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-brand .brand-icon {
            background: rgba(255, 255, 255, 0.15);
        }

        .footer-brand p {
            font-size: 14.5px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.65);
            max-width: 340px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

        .footer-col ul {
            display: grid;
            gap: 12px;
        }

        .footer-col ul a {
            font-size: 14.5px;
            color: rgba(255, 255, 255, 0.65);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

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

        .footer-bottom {
            padding: 24px 0 30px;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13.5px;
            color: rgba(255, 255, 255, 0.5);
        }

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

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .page-hero h1 {
                font-size: 36px;
            }
        }

        @media (max-width: 768px) {
            .main-nav {
                position: fixed;
                top: 76px;
                left: 0;
                right: 0;
                background: var(--white);
                flex-direction: column;
                align-items: stretch;
                padding: 18px 24px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                transition: transform 0.35s ease;
                z-index: 99;
            }

            .main-nav.open {
                transform: translateY(0);
            }

            .main-nav .nav-link {
                justify-content: center;
                padding: 13px 18px;
                font-size: 15.5px;
                border-radius: 12px;
            }

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

            .section {
                padding: 68px 0;
            }

            .page-hero {
                padding: 76px 0 64px;
            }

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

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

            .intro-img img {
                height: 260px;
            }

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

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

            .section-head h2 {
                font-size: 27px;
            }

            .cta-inner h2 {
                font-size: 27px;
            }

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

            .timeline-wrap {
                padding-left: 22px;
            }

            .step-num {
                left: -22px;
                width: 46px;
                height: 46px;
                font-size: 17px;
            }

            .step-item {
                padding-left: 30px;
            }

            .step-card {
                padding: 22px;
            }

            .hero-meta {
                gap: 16px;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                height: 68px;
                gap: 10px;
            }

            .brand {
                font-size: 17px;
                gap: 8px;
            }

            .brand-icon {
                width: 34px;
                height: 34px;
                font-size: 15px;
                border-radius: 10px;
            }

            .btn-sm {
                padding: 7px 14px;
                font-size: 13px;
            }

            .page-hero h1 {
                font-size: 25px;
            }

            .hero-desc {
                font-size: 15px;
            }

            .hero-actions .btn {
                width: 100%;
            }

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

            .stat-num {
                font-size: 30px;
            }

            .notice-card {
                flex-direction: column;
                padding: 24px;
            }

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

            .faq-answer {
                padding: 16px 0 20px;
            }

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

            .section-head h2 {
                font-size: 23px;
            }

            .section-head p {
                font-size: 14.5px;
            }
        }

/* roulang page: article */
:root{
    --primary-dark:#0b1f3a;
    --primary:#12355f;
    --primary-light:#1d4a82;
    --accent:#c9a227;
    --accent-light:#e5c766;
    --accent-soft:#f8f0d8;
    --bg-body:#f5f7fb;
    --bg-white:#ffffff;
    --bg-muted:#eef1f6;
    --text-main:#1e293b;
    --text-body:#3b4c63;
    --text-light:#64748b;
    --text-muted:#94a3b8;
    --border:#e2e8f0;
    --border-darker:#c7d2e0;
    --radius-sm:8px;
    --radius-md:14px;
    --radius-lg:22px;
    --radius-xl:30px;
    --shadow-sm:0 2px 10px rgba(15,36,68,.06);
    --shadow-md:0 10px 32px rgba(15,36,68,.1);
    --shadow-lg:0 22px 55px rgba(15,36,68,.16);
    --sp-xs:8px;
    --sp-sm:16px;
    --sp-md:28px;
    --sp-lg:52px;
    --sp-xl:86px;
    --container-max:1200px;
    --nav-height:70px;
}
*,*::before,*::after{
    box-sizing:border-box;
    margin:0;
    padding:0;
}
html{
    scroll-behavior:smooth;
}
body{
    font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
    font-size:16px;
    line-height:1.7;
    color:var(--text-body);
    background:var(--bg-body);
    -webkit-font-smoothing:antialiased;
}
img{
    max-width:100%;
    height:auto;
    display:block;
}
a{
    text-decoration:none;
    color:inherit;
    transition:all .3s ease;
}
ul,ol{
    list-style:none;
}
button{
    font-family:inherit;
    cursor:pointer;
    border:none;
    background:none;
}
input{
    font-family:inherit;
}
.container{
    width:100%;
    max-width:var(--container-max);
    margin:0 auto;
    padding:0 24px;
}
.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:12px 28px;
    border-radius:50px;
    font-size:15px;
    font-weight:600;
    line-height:1.4;
    border:2px solid transparent;
    transition:all .3s ease;
    white-space:nowrap;
}
.btn-primary{
    background:linear-gradient(135deg,var(--accent),#b3871d);
    color:#10233f;
    border-color:var(--accent);
    box-shadow:0 6px 20px rgba(201,162,39,.25);
}
.btn-primary:hover{
    transform:translateY(-2px);
    box-shadow:0 10px 28px rgba(201,162,39,.35);
    background:linear-gradient(135deg,var(--accent-light),var(--accent));
}
.btn-outline{
    background:transparent;
    color:#ffffff;
    border-color:rgba(255,255,255,.5);
}
.btn-outline:hover{
    border-color:#ffffff;
    background:rgba(255,255,255,.1);
}
.btn-sm{
    padding:8px 18px;
    font-size:14px;
}
.btn-lg{
    padding:16px 42px;
    font-size:17px;
}
/* ===== Header ===== */
.site-header{
    position:sticky;
    top:0;
    z-index:1000;
    background:rgba(11,31,58,.95);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid rgba(255,255,255,.06);
    box-shadow:0 4px 24px rgba(0,0,0,.2);
}
.header-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    height:var(--nav-height);
    gap:20px;
}
.brand{
    display:flex;
    align-items:center;
    gap:10px;
    font-size:22px;
    font-weight:800;
    color:#ffffff;
    letter-spacing:.5px;
    flex-shrink:0;
}
.brand-icon{
    width:40px;
    height:40px;
    border-radius:12px;
    background:linear-gradient(135deg,var(--accent),#a17e1a);
    display:flex;
    align-items:center;
    justify-content:center;
    color:#10233f;
    font-size:17px;
}
.main-nav{
    display:flex;
    align-items:center;
    gap:6px;
    flex-wrap:nowrap;
    overflow-x:auto;
    scrollbar-width:none;
}
.main-nav::-webkit-scrollbar{
    display:none;
}
.nav-link{
    color:rgba(255,255,255,.78);
    font-size:15px;
    font-weight:500;
    padding:10px 16px;
    border-radius:50px;
    transition:all .3s;
    white-space:nowrap;
}
.nav-link:hover{
    color:#ffffff;
    background:rgba(255,255,255,.1);
}
.nav-link.active{
    color:#10233f;
    background:linear-gradient(135deg,var(--accent-light),var(--accent));
    font-weight:600;
}
.header-actions{
    display:flex;
    align-items:center;
    gap:12px;
    flex-shrink:0;
}
.nav-toggle{
    display:none;
    width:42px;
    height:42px;
    border-radius:10px;
    background:rgba(255,255,255,.1);
    color:#fff;
    font-size:18px;
    align-items:center;
    justify-content:center;
    transition:all .3s;
}
.nav-toggle:hover{
    background:rgba(255,255,255,.2);
}
/* ===== Article Banner ===== */
.article-banner{
    position:relative;
    background:linear-gradient(135deg,rgba(8,20,40,.94),rgba(18,50,90,.88)),url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    padding:70px 0 60px;
    color:#fff;
    border-bottom:4px solid var(--accent);
}
.article-banner::after{
    content:"";
    position:absolute;
    right:-60px;
    top:-60px;
    width:260px;
    height:260px;
    background:radial-gradient(circle,rgba(201,162,39,.15),transparent 70%);
    border-radius:50%;
    pointer-events:none;
}
.breadcrumb{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:14px;
    color:rgba(255,255,255,.65);
    margin-bottom:20px;
    flex-wrap:wrap;
}
.breadcrumb a{
    color:rgba(255,255,255,.8);
}
.breadcrumb a:hover{
    color:var(--accent-light);
}
.breadcrumb i{
    font-size:12px;
    color:rgba(255,255,255,.4);
}
.banner-title{
    font-size:clamp(26px,4vw,40px);
    font-weight:800;
    line-height:1.35;
    margin-bottom:18px;
    color:#fff;
    max-width:860px;
    letter-spacing:.5px;
}
.banner-meta{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:18px;
    font-size:14px;
    color:rgba(255,255,255,.7);
}
.meta-item{
    display:flex;
    align-items:center;
    gap:7px;
}
.meta-item i{
    color:var(--accent-light);
}
.badge{
    display:inline-block;
    background:linear-gradient(135deg,var(--accent),#b3871d);
    color:#10233f;
    font-size:12px;
    font-weight:700;
    padding:4px 14px;
    border-radius:50px;
}
/* ===== Article Main ===== */
.article-main{
    padding:var(--sp-lg) 0;
}
.article-layout{
    display:grid;
    grid-template-columns:minmax(0,1fr) 350px;
    gap:40px;
    align-items:start;
}
.article-content-wrap{
    background:var(--bg-white);
    border-radius:var(--radius-lg);
    padding:44px 48px;
    box-shadow:var(--shadow-md);
    border:1px solid var(--border);
}
.article-body h2{
    font-size:1.65rem;
    color:var(--text-main);
    margin:1.8rem 0 1rem;
    padding-left:14px;
    border-left:4px solid var(--accent);
    line-height:1.4;
}
.article-body h3{
    font-size:1.3rem;
    color:var(--text-main);
    margin:1.5rem 0 .7rem;
    line-height:1.45;
}
.article-body p{
    margin-bottom:1.2rem;
    color:var(--text-body);
    line-height:1.9;
    font-size:15.5px;
}
.article-body ul{
    margin:1rem 0 1.4rem;
    padding-left:1.5rem;
    list-style:disc;
}
.article-body ul li{
    margin-bottom:.55rem;
    line-height:1.8;
}
.article-body ol{
    margin:1rem 0 1.4rem;
    padding-left:1.5rem;
    list-style:decimal;
}
.article-body ol li{
    margin-bottom:.55rem;
    line-height:1.8;
}
.article-body blockquote{
    background:var(--bg-muted);
    border-left:4px solid var(--accent);
    padding:16px 22px;
    border-radius:0 10px 10px 0;
    margin:1.4rem 0;
    color:var(--text-main);
}
.article-body a{
    color:var(--primary);
    border-bottom:1px solid rgba(18,53,95,.3);
}
.article-body a:hover{
    color:var(--accent);
    border-bottom-color:var(--accent);
}
.article-body img{
    border-radius:16px;
    margin:1.4rem 0;
    box-shadow:var(--shadow-sm);
}
.article-body table{
    width:100%;
    border-collapse:collapse;
    margin:1.4rem 0;
    font-size:14.5px;
}
.article-body table th,
.article-body table td{
    border:1px solid var(--border);
    padding:12px 16px;
    text-align:left;
}
.article-body table th{
    background:var(--bg-muted);
    color:var(--text-main);
    font-weight:600;
}
.article-empty{
    text-align:center;
    padding:70px 30px;
}
.empty-icon{
    width:86px;
    height:86px;
    border-radius:50%;
    background:var(--accent-soft);
    color:var(--accent);
    font-size:32px;
    display:flex;
    align-items:center;
    justify-content:center;
    margin:0 auto 22px;
}
.article-empty h2{
    font-size:26px;
    color:var(--text-main);
    margin-bottom:12px;
}
.article-empty p{
    color:var(--text-light);
    margin-bottom:28px;
}
/* ===== Sidebar ===== */
.article-sidebar{
    display:flex;
    flex-direction:column;
    gap:24px;
    position:sticky;
    top:calc(var(--nav-height) + 20px);
}
.side-card{
    background:var(--bg-white);
    border:1px solid var(--border);
    border-radius:var(--radius-md);
    padding:26px;
    box-shadow:var(--shadow-sm);
    transition:box-shadow .3s;
}
.side-card:hover{
    box-shadow:var(--shadow-md);
}
.side-card-title{
    display:flex;
    align-items:center;
    gap:10px;
    font-size:17px;
    color:var(--text-main);
    font-weight:700;
    margin-bottom:18px;
    padding-bottom:14px;
    border-bottom:2px solid var(--accent-soft);
}
.side-card-title i{
    color:var(--accent);
}
.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-label{
    color:var(--text-light);
}
.info-value{
    color:var(--text-main);
    font-weight:600;
}
.cat-matrix{
    display:flex;
    flex-direction:column;
    gap:10px;
}
.cat-matrix a{
    display:flex;
    align-items:center;
    gap:12px;
    padding:13px 14px;
    border-radius:12px;
    background:var(--bg-muted);
    color:var(--text-main);
    font-size:14.5px;
    font-weight:500;
    transition:all .3s;
}
.cat-matrix a i{
    width:34px;
    height:34px;
    border-radius:9px;
    background:var(--primary);
    color:#fff;
    font-size:14px;
    display:flex;
    align-items:center;
    justify-content:center;
    flex-shrink:0;
    transition:background .3s;
}
.cat-matrix a:hover{
    background:var(--accent-soft);
    transform:translateX(4px);
}
.cat-matrix a:hover i{
    background:var(--accent);
    color:#10233f;
}
.side-post-list li{
    margin-bottom:8px;
}
.side-post-link{
    display:flex;
    justify-content:space-between;
    align-items:center;
    gap:12px;
    padding:12px 14px;
    border-radius:10px;
    background:var(--bg-muted);
    transition:all .3s;
    border:1px solid transparent;
}
.side-post-link:hover{
    background:var(--accent-soft);
    border-color:rgba(201,162,39,.3);
    transform:translateX(3px);
}
.side-post-title{
    font-size:14px;
    color:var(--text-main);
    font-weight:500;
    line-height:1.5;
    flex:1;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
}
.side-post-date{
    font-size:12px;
    color:var(--text-muted);
    flex-shrink:0;
}
/* ===== Related Posts ===== */
.related-posts{
    padding:var(--sp-lg) 0;
    background:var(--bg-white);
    border-top:1px solid var(--border);
}
.section-head{
    text-align:center;
    margin-bottom:40px;
}
.section-head .eyebrow{
    display:inline-block;
    font-size:13px;
    font-weight:700;
    color:var(--accent);
    text-transform:uppercase;
    letter-spacing:2px;
    margin-bottom:8px;
    background:var(--accent-soft);
    padding:4px 16px;
    border-radius:50px;
}
.section-head h2{
    font-size:clamp(24px,3vw,34px);
    color:var(--text-main);
    font-weight:800;
    margin-bottom:10px;
    line-height:1.35;
}
.section-head p{
    font-size:15.5px;
    color:var(--text-light);
    max-width:560px;
    margin:0 auto;
}
.related-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:24px;
}
.related-card{
    background:var(--bg-body);
    border:1px solid var(--border);
    border-radius:var(--radius-md);
    overflow:hidden;
    transition:all .35s ease;
}
.related-card:hover{
    transform:translateY(-6px);
    box-shadow:var(--shadow-lg);
    border-color:rgba(201,162,39,.4);
}
.related-cover img{
    width:100%;
    height:190px;
    object-fit:cover;
    transition:transform .5s;
}
.related-card:hover .related-cover img{
    transform:scale(1.05);
}
.related-body{
    padding:22px;
}
.related-meta{
    display:flex;
    justify-content:space-between;
    align-items:center;
    font-size:13px;
    color:var(--text-muted);
    margin-bottom:12px;
}
.related-body h3{
    font-size:17px;
    line-height:1.5;
    color:var(--text-main);
    margin-bottom:10px;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
    transition:color .3s;
}
.related-card:hover .related-body h3{
    color:var(--primary-light);
}
/* ===== Category Guide ===== */
.category-guide{
    padding:var(--sp-xl) 0;
    background:var(--bg-body);
}
.guide-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:26px;
}
.guide-card{
    position:relative;
    border-radius:var(--radius-lg);
    overflow:hidden;
    min-height:240px;
    display:flex;
    align-items:flex-end;
    padding:28px;
    color:#fff;
    transition:all .35s;
    box-shadow:var(--shadow-md);
}
.guide-card::before{
    content:"";
    position:absolute;
    inset:0;
    background:linear-gradient(180deg,rgba(6,16,34,.15) 0%,rgba(6,16,34,.85) 100%);
    z-index:1;
    transition:all .35s;
}
.guide-card:hover{
    transform:translateY(-8px);
    box-shadow:var(--shadow-lg);
}
.guide-card:hover::before{
    background:linear-gradient(180deg,rgba(6,16,34,.05) 0%,rgba(6,16,34,.9) 100%);
}
.guide-card .guide-content{
    position:relative;
    z-index:2;
}
.guide-card h3{
    font-size:20px;
    font-weight:700;
    margin-bottom:6px;
}
.guide-card p{
    font-size:14px;
    opacity:.85;
    margin-bottom:14px;
}
.guide-card .guide-link{
    display:inline-flex;
    align-items:center;
    gap:7px;
    font-size:14px;
    font-weight:600;
    color:var(--accent-light);
}
.guide-card .guide-link i{
    transition:transform .3s;
}
.guide-card:hover .guide-link i{
    transform:translateX(5px);
}
/* ===== FAQ ===== */
.faq-section{
    padding:var(--sp-xl) 0;
    background:var(--bg-white);
    border-top:1px solid var(--border);
}
.faq-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:20px;
    margin-top:40px;
}
.faq-item{
    background:var(--bg-body);
    border:1px solid var(--border);
    border-radius:var(--radius-md);
    padding:24px 28px;
    transition:all .3s;
    cursor:pointer;
}
.faq-item:hover{
    border-color:rgba(201,162,39,.4);
    box-shadow:var(--shadow-sm);
}
.faq-item h3{
    font-size:16.5px;
    color:var(--text-main);
    font-weight:600;
    margin-bottom:8px;
    display:flex;
    align-items:center;
    gap:10px;
}
.faq-item h3 i{
    color:var(--accent);
    font-size:14px;
    flex-shrink:0;
}
.faq-item p{
    font-size:14.5px;
    color:var(--text-light);
    line-height:1.75;
}
/* ===== CTA ===== */
.cta-section{
    padding:var(--sp-xl) 0;
    background:linear-gradient(135deg,rgba(8,20,40,.96),rgba(18,50,90,.92)),url('/assets/images/backpic/back-3.png') center/cover no-repeat;
    position:relative;
    overflow:hidden;
}
.cta-inner{
    text-align:center;
    max-width:680px;
    margin:0 auto;
    color:#fff;
}
.cta-inner h2{
    font-size:clamp(24px,3.5vw,34px);
    font-weight:800;
    margin-bottom:14px;
    line-height:1.4;
}
.cta-inner p{
    font-size:16px;
    color:rgba(255,255,255,.75);
    margin-bottom:30px;
}
.cta-buttons{
    display:flex;
    gap:14px;
    justify-content:center;
    flex-wrap:wrap;
}
/* ===== Footer ===== */
.site-footer{
    background:#0b1c33;
    color:rgba(255,255,255,.7);
    padding:60px 0 0;
    border-top:1px solid rgba(255,255,255,.06);
}
.footer-grid{
    display:grid;
    grid-template-columns:1.4fr 1fr 1fr;
    gap:42px;
    padding-bottom:44px;
    border-bottom:1px solid rgba(255,255,255,.06);
}
.footer-brand .brand{
    margin-bottom:16px;
}
.footer-brand p{
    font-size:14.5px;
    line-height:1.8;
    color:rgba(255,255,255,.55);
    max-width:380px;
}
.footer-col h4{
    color:#ffffff;
    font-size:16px;
    font-weight:600;
    margin-bottom:18px;
    position:relative;
    padding-bottom:10px;
}
.footer-col h4::after{
    content:"";
    position:absolute;
    left:0;
    bottom:0;
    width:36px;
    height:2px;
    background:var(--accent);
    border-radius:2px;
}
.footer-col ul li{
    margin-bottom:10px;
}
.footer-col ul a{
    font-size:14.5px;
    color:rgba(255,255,255,.55);
    transition:all .3s;
}
.footer-col ul a:hover{
    color:var(--accent-light);
    padding-left:4px;
}
.footer-bottom{
    padding:24px 0;
    text-align:center;
    font-size:14px;
    color:rgba(255,255,255,.4);
}
/* ===== Responsive ===== */
@media (max-width:1024px){
    .article-layout{
        grid-template-columns:1fr;
    }
    .article-sidebar{
        position:static;
        display:grid;
        grid-template-columns:repeat(3,1fr);
    }
    .related-grid{
        grid-template-columns:repeat(2,1fr);
    }
    .guide-grid{
        grid-template-columns:repeat(2,1fr);
    }
}
@media (max-width:820px){
    .header-actions .btn{
        display:none;
    }
    .nav-toggle{
        display:flex;
    }
    .main-nav{
        position:fixed;
        top:var(--nav-height);
        left:0;
        right:0;
        background:rgba(11,31,58,.98);
        flex-direction:column;
        align-items:stretch;
        padding:16px 24px 22px;
        gap:8px;
        transform:translateY(-130%);
        transition:transform .35s ease;
        border-bottom:3px solid var(--accent);
        box-shadow:0 18px 40px rgba(0,0,0,.2);
        max-height:calc(100vh - var(--nav-height));
        overflow-y:auto;
    }
    .main-nav.open{
        transform:translateY(0);
    }
    .nav-link{
        padding:13px 18px;
        font-size:15px;
        background:rgba(255,255,255,.05);
        border-radius:12px;
        width:100%;
        text-align:center;
    }
    .nav-link.active{
        background:linear-gradient(135deg,var(--accent-light),var(--accent));
        color:#10233f;
    }
    .article-sidebar{
        grid-template-columns:1fr;
    }
    .tab-grid{
        grid-template-columns:1fr 1fr;
    }
}
@media (max-width:600px){
    .container{
        padding:0 16px;
    }
    .article-content-wrap{
        padding:28px 22px;
    }
    .article-main{
        padding:36px 0;
    }
    .related-grid,
    .guide-grid{
        grid-template-columns:1fr;
    }
    .faq-grid{
        grid-template-columns:1fr;
    }
    .footer-grid{
        grid-template-columns:1fr;
        gap:28px;
    }
    .brand{
        font-size:18px;
    }
    .brand-icon{
        width:34px;
        height:34px;
        font-size:15px;
    }
    .banner-title{
        font-size:24px;
    }
    .article-banner{
        padding:48px 0 40px;
    }
    .cta-buttons .btn{
        width:100%;
    }
    .header-inner{
        gap:8px;
    }
    .header-actions{
        gap:6px;
    }
}
@media (max-width:420px){
    .brand{
        font-size:16px;
    }
    .brand-icon{
        width:30px;
        height:30px;
        font-size:13px;
        border-radius:9px;
    }
    .nav-toggle{
        width:38px;
        height:38px;
        font-size:16px;
    }
    .guide-card{
        min-height:200px;
        padding:20px;
    }
}

/* roulang page: category2 */
:root {
  --primary: #0b1f3a;
  --primary-light: #16325a;
  --primary-dark: #061124;
  --accent: #d4a24e;
  --accent-dark: #b8893d;
  --accent-light: #f0d9a8;
  --bg: #f6f8fc;
  --bg-white: #ffffff;
  --bg-light: #eef2f7;
  --text: #1c2333;
  --text-light: #5a6b85;
  --text-lighter: #8a97ad;
  --border: #e4e8f0;
  --radius: 16px;
  --radius-sm: 9px;
  --radius-lg: 26px;
  --shadow: 0 8px 30px rgba(11, 31, 58, 0.08);
  --shadow-lg: 0 20px 50px rgba(11, 31, 58, 0.14);
  --spacer: 84px;
  --font: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 15px;
  overflow-x: hidden;
}

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

a, button, input {
  transition: all .25s ease;
}

a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 3px solid rgba(212, 162, 78, .55);
  outline-offset: 2px;
}

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

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== Header ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 16px rgba(11, 31, 58, .06);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 800;
  color: var(--primary);
  white-space: nowrap;
  letter-spacing: .5px;
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 17px;
  box-shadow: 0 4px 14px rgba(11, 31, 58, .28);
}

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

.nav-link {
  padding: 10px 18px;
  border-radius: 9px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text-light);
  position: relative;
}

.nav-link:hover {
  color: var(--primary);
  background: var(--bg-light);
}

.nav-link.active {
  color: var(--primary);
  background: rgba(212, 162, 78, .12);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 22px;
  height: 3px;
  border-radius: 3px;
  background: var(--accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 700;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all .28s ease;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 13.5px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: var(--primary-dark);
  box-shadow: 0 4px 16px rgba(212, 162, 78, .35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212, 162, 78, .45);
}

.btn-outline {
  border-color: rgba(255, 255, 255, .7);
  color: #fff;
}

.btn-outline:hover {
  background: rgba(255, 255, 255, .12);
  border-color: #fff;
}

.nav-toggle {
  display: none;
  font-size: 22px;
  color: var(--primary);
  width: 42px;
  height: 42px;
  border-radius: 9px;
  background: var(--bg-light);
  align-items: center;
  justify-content: center;
}

/* ========== Hero ========== */
.page-hero {
  position: relative;
  padding: 100px 0 90px;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  color: #fff;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(11, 31, 58, .94) 20%, rgba(11, 31, 58, .72) 60%, rgba(11, 31, 58, .45));
}

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

.hero-breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: rgba(255, 255, 255, .75);
  margin-bottom: 18px;
}

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

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

.page-hero h1 {
  font-size: 46px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 18px;
  letter-spacing: 1px;
}

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

.page-hero p {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255, 255, 255, .88);
  max-width: 680px;
  margin-bottom: 30px;
}

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

/* ========== Section common ========== */
.section {
  padding: var(--spacer) 0;
}

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

.section-head {
  max-width: 720px;
  margin-bottom: 56px;
}

.section-head.center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section-head .tag {
  display: inline-block;
  background: rgba(212, 162, 78, .12);
  color: var(--accent-dark);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 30px;
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.3;
  margin-bottom: 14px;
}

.section-head p {
  color: var(--text-light);
  font-size: 16px;
  line-height: 1.8;
}

/* ========== Steps / Timeline ========== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  counter-reset: step;
  position: relative;
}

.steps-grid::before {
  content: "";
  position: absolute;
  top: 42px;
  left: 60px;
  right: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--border) 60%, var(--border));
  z-index: 0;
}

.step-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 32px 24px;
  text-align: center;
  position: relative;
  z-index: 1;
  transition: transform .3s, box-shadow .3s;
}

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

.step-num {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--accent);
  font-size: 22px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(11, 31, 58, .22);
}

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

.step-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ========== Feature Cards ========== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 34px 28px;
  position: relative;
  overflow: hidden;
  transition: transform .3s ease, box-shadow .3s ease;
}

.feature-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 90px;
  height: 90px;
  border-radius: 0 0 0 90px;
  background: linear-gradient(135deg, transparent 40%, rgba(212, 162, 78, .1));
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 22px;
  margin-bottom: 22px;
  box-shadow: 0 6px 18px rgba(11, 31, 58, .18);
}

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

.feature-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.75;
}

/* ========== Stats ========== */
.stats-section {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
  color: #fff;
  position: relative;
  overflow: hidden;
}

.stats-section::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -80px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(212, 162, 78, .08);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  position: relative;
  text-align: center;
}

.stat-block {
  padding: 20px;
}

.stat-number {
  font-size: 46px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
  letter-spacing: 1px;
}

.stat-label {
  font-size: 15px;
  color: rgba(255, 255, 255, .78);
  margin-top: 8px;
  font-weight: 500;
}

/* ========== Split / Text-Image ========== */
.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.split-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}

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

.split-content h2 {
  font-size: 30px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.35;
  margin-bottom: 18px;
}

.split-content > p {
  color: var(--text-light);
  font-size: 15.5px;
  line-height: 1.8;
  margin-bottom: 26px;
}

.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 9px 0;
  font-size: 15px;
  color: var(--text);
}

.check-list li i {
  color: var(--accent);
  margin-top: 4px;
  flex-shrink: 0;
}

/* ========== Security ========== */
.security-section {
  background: var(--bg-light);
}

.security-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  align-items: center;
  border: 1px solid var(--border);
}

.security-info h2 {
  font-size: 26px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 14px;
}

.security-info p {
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 22px;
}

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

.score-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.score-row .score-label {
  display: flex;
  justify-content: space-between;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-light);
}

.score-bar {
  height: 8px;
  border-radius: 10px;
  background: var(--bg-light);
  overflow: hidden;
}

.score-bar span {
  display: block;
  height: 100%;
  border-radius: 10px;
  background: linear-gradient(90deg, var(--accent), var(--accent-dark));
}

/* ========== FAQ ========== */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: box-shadow .3s;
}

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

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 28px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
  list-style: none;
}

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

.faq-item summary i {
  font-size: 14px;
  color: var(--accent);
  transition: transform .3s;
  flex-shrink: 0;
}

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

.faq-item .faq-answer {
  padding: 0 28px 22px;
  color: var(--text-light);
  font-size: 14.5px;
  line-height: 1.8;
  border-top: 1px dashed var(--border);
  margin: 0 28px 0;
  padding-left: 0;
  padding-right: 0;
}

/* ========== CTA ========== */
.cta-section {
  padding: 90px 0;
  background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
  position: relative;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(11, 31, 58, .93), rgba(11, 31, 58, .75));
}

.cta-box {
  position: relative;
  z-index: 2;
  max-width: 780px;
  margin: 0 auto;
  text-align: center;
  color: #fff;
}

.cta-box h2 {
  font-size: 34px;
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-box p {
  font-size: 16px;
  color: rgba(255, 255, 255, .82);
  margin-bottom: 32px;
  line-height: 1.8;
}

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

/* ========== Footer ========== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, .8);
  padding: 70px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 46px;
}

.footer-brand .brand {
  color: #fff;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, .65);
  max-width: 340px;
}

.footer-col h4 {
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 3px;
  border-radius: 3px;
  background: var(--accent);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, .65);
  transition: color .25s;
}

.footer-col ul li a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  padding: 22px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, .5);
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  :root {
    --spacer: 64px;
  }

  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 22px;
  }

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

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

  .split-layout {
    gap: 36px;
  }

  .security-card {
    grid-template-columns: 1fr;
    padding: 32px;
  }
}

@media (max-width: 768px) {
  :root {
    --spacer: 52px;
  }

  .header-inner {
    height: 64px;
  }

  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    gap: 8px;
    box-shadow: 0 16px 32px rgba(11, 31, 58, .12);
    transform: translateY(-120%);
    transition: transform .3s ease;
    border-radius: 0 0 16px 16px;
    z-index: 99;
  }

  .main-nav.open {
    transform: translateY(0);
  }

  .nav-link {
    padding: 14px 18px;
    font-size: 15px;
  }

  .nav-link.active::after {
    left: 18px;
    transform: none;
    width: 3px;
    height: 20px;
    top: 50%;
    transform: translateY(-50%);
  }

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

  .header-actions .btn {
    display: none;
  }

  .page-hero {
    padding: 72px 0 60px;
  }

  .page-hero h1 {
    font-size: 32px;
  }

  .page-hero p {
    font-size: 15.5px;
  }

  .section-head h2 {
    font-size: 27px;
  }

  .feature-grid,
  .stats-grid,
  .split-layout {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    gap: 20px;
  }

  .split-img img {
    height: 280px;
  }

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

  .cta-box h2 {
    font-size: 27px;
  }
}

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

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

  .hero-btns {
    flex-direction: column;
    width: 100%;
  }

  .hero-btns .btn {
    width: 100%;
  }

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

  .faq-item summary {
    padding: 18px 20px;
    font-size: 15px;
  }

  .faq-item .faq-answer {
    padding-top: 14px;
    font-size: 14px;
  }

  .stat-number {
    font-size: 36px;
  }
}

/* roulang page: category3 */
/* ===== 设计变量 ===== */
:root {
  --primary: #0d1b3e;
  --primary-rgb: 13, 27, 62;
  --primary-light: #172c5c;
  --gold: #c8a04a;
  --gold-light: #e6d3a3;
  --bg-body: #f4f6fa;
  --bg-white: #ffffff;
  --bg-dark: #0a1228;
  --text: #16213e;
  --text-muted: #64748b;
  --text-light: #9aa8bc;
  --border: #e3e9f2;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow-xs: 0 2px 6px rgba(13, 27, 62, 0.05);
  --shadow-sm: 0 4px 16px rgba(13, 27, 62, 0.07);
  --shadow-md: 0 12px 36px rgba(13, 27, 62, 0.10);
  --shadow-lg: 0 24px 60px rgba(13, 27, 62, 0.16);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container: 1200px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ===== Reset 基础 ===== */
*, *::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: 1.75;
  color: var(--text);
  background: var(--bg-body);
  -webkit-font-smoothing: antialiased;
}

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

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

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

input, select, textarea {
  font-family: inherit;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--primary);
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold), #d8b25e);
  color: var(--primary);
  box-shadow: 0 6px 20px rgba(200, 160, 74, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(200, 160, 74, 0.45);
}

.btn-outline {
  border: 2px solid rgba(255, 255, 255, 0.75);
  color: #fff;
  background: transparent;
}

.btn-outline:hover {
  border-color: var(--gold);
  color: var(--gold);
  transform: translateY(-2px);
}

.btn-light {
  background: #fff;
  color: var(--primary);
  box-shadow: var(--shadow-md);
}

.btn-light:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-sm {
  padding: 9px 20px;
  font-size: 14px;
}

.btn-lg {
  padding: 16px 38px;
  font-size: 17px;
}

/* ===== Header 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(13, 27, 62, 0.94);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  transition: var(--transition);
}

.site-header.scrolled {
  background: rgba(13, 27, 62, 0.98);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
}

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

.brand-icon {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--gold), #e2c070);
  color: var(--primary);
  font-size: 17px;
  box-shadow: 0 4px 14px rgba(200, 160, 74, 0.4);
}

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

.main-nav .nav-link {
  position: relative;
  padding: 10px 14px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.82);
  transition: var(--transition);
}

.main-nav .nav-link:hover {
  color: var(--gold);
  background: rgba(200, 160, 74, 0.1);
}

.main-nav .nav-link.active {
  color: var(--gold);
  background: rgba(200, 160, 74, 0.14);
  font-weight: 600;
}

.main-nav .nav-link.active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  transform: translateX(-50%);
  width: 18px;
  height: 3px;
  border-radius: 3px;
  background: var(--gold);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 18px;
  align-items: center;
  justify-content: center;
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.2);
}

.nav-link:focus-visible,
.btn:focus-visible,
.nav-toggle:focus-visible {
  outline: 3px solid rgba(200, 160, 74, 0.6);
  outline-offset: 2px;
}

/* ===== 页面 Banner ===== */
.page-banner {
  position: relative;
  padding: 168px 0 96px;
  background-image: url("/assets/images/backpic/back-2.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  color: #fff;
  overflow: hidden;
}

.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(13, 27, 62, 0.93) 0%, rgba(13, 27, 62, 0.78) 50%, rgba(23, 44, 92, 0.55) 100%);
  z-index: 1;
}

.page-banner::after {
  content: "";
  position: absolute;
  width: 500px;
  height: 500px;
  right: -160px;
  top: -140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200, 160, 74, 0.28) 0%, transparent 70%);
  z-index: 2;
}

.banner-content {
  position: relative;
  z-index: 5;
  max-width: 800px;
}

.banner-title {
  font-size: 46px;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 1px;
  line-height: 1.25;
}

.banner-title span {
  color: var(--gold);
}

.banner-subtitle {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.85);
  max-width: 620px;
  line-height: 1.8;
  margin-bottom: 32px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

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

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

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

.breadcrumb .current {
  color: var(--gold);
}

/* ===== 通用 Section ===== */
.section {
  padding: 96px 0;
}

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

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(200, 160, 74, 0.12);
  color: #9c7c2f;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.section-badge i {
  font-size: 12px;
}

.section-title {
  font-size: 36px;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}

.section-title em {
  font-style: normal;
  color: var(--gold);
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ===== 核心服务卡片 ===== */
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(200, 160, 74, 0.4);
}

.service-card-media {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.service-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

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

.service-card-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(13, 27, 62, 0.25) 100%);
}

.service-card-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(13, 27, 62, 0.82);
  color: var(--gold);
  font-size: 12px;
  font-weight: 600;
  backdrop-filter: blur(8px);
}

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

.service-card-title {
  font-size: 18px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.service-card-title i {
  color: var(--gold);
  font-size: 16px;
}

.service-card-text {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
  flex: 1;
}

.service-card-link {
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.service-card-link i {
  transition: transform 0.3s ease;
}

.service-card-link:hover {
  color: var(--gold);
}

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

/* ===== 安全保障体系 ===== */
.security-section {
  background: var(--bg-dark);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.security-section::before {
  content: "";
  position: absolute;
  width: 600px;
  height: 600px;
  left: -200px;
  bottom: -200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200, 160, 74, 0.14) 0%, transparent 70%);
}

.security-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.security-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.4);
}

.security-image img {
  width: 100%;
  height: 460px;
  object-fit: cover;
}

.security-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(13, 27, 62, 0.5) 100%);
}

.security-image-badge {
  position: absolute;
  bottom: 20px;
  left: 20px;
  z-index: 3;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 13px;
  color: #fff;
}

.security-content .section-badge {
  background: rgba(200, 160, 74, 0.18);
  color: var(--gold);
}

.security-content .section-title {
  color: #fff;
}

.security-content .section-subtitle {
  color: rgba(255, 255, 255, 0.7);
}

.security-list {
  margin-top: 30px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.security-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition);
}

.security-item:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(200, 160, 74, 0.35);
  transform: translateY(-3px);
}

.security-item-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--gold), #e0bc68);
  color: var(--primary);
  font-size: 15px;
  box-shadow: 0 4px 12px rgba(200, 160, 74, 0.3);
}

.security-item-text h4 {
  font-size: 15px;
  color: #fff;
  margin-bottom: 4px;
}

.security-item-text p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.6;
}

/* ===== 支付流程 ===== */
.flow-section {
  background: linear-gradient(180deg, var(--bg-body) 0%, #eef2f8 100%);
}

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

.flow-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.flow-step {
  position: relative;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 24px 28px;
  text-align: center;
  transition: var(--transition);
  backdrop-filter: blur(8px);
}

.flow-step:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(200, 160, 74, 0.4);
}

.flow-step::before {
  content: "";
  position: absolute;
  top: 44px;
  right: -15px;
  width: 30px;
  height: 2px;
  background: linear-gradient(90deg, rgba(200, 160, 74, 0.5), transparent);
  z-index: 2;
}

.flow-step:last-child::before {
  display: none;
}

.step-number {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  color: var(--gold);
  background: linear-gradient(135deg, rgba(200, 160, 74, 0.2), rgba(200, 160, 74, 0.06));
  border: 2px solid rgba(200, 160, 74, 0.4);
}

.step-icon {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: rgba(13, 27, 62, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--primary);
}

.flow-step h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.flow-step p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== 数据亮点 ===== */
.stats-section {
  position: relative;
  padding: 72px 0;
  background-image: url("/assets/images/backpic/back-1.png");
  background-size: cover;
  background-position: center center;
  background-attachment: fixed;
  color: #fff;
}

.stats-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13, 27, 62, 0.94) 0%, rgba(13, 27, 62, 0.88) 100%);
}

.stats-grid {
  position: relative;
  z-index: 5;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
}

.stat-item {
  padding: 30px 20px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
  transition: var(--transition);
}

.stat-item:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-4px);
}

.stat-number {
  font-size: 42px;
  font-weight: 800;
  color: var(--gold);
  line-height: 1.2;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.8);
}

/* ===== FAQ ===== */
.faq-wrap {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 48px;
}

.faq-side {
  position: sticky;
  top: 100px;
  align-self: start;
}

.faq-side .section-badge {
  background: rgba(200, 160, 74, 0.12);
  color: #9c7c2f;
}

.faq-side h2 {
  font-size: 32px;
  margin-bottom: 14px;
}

.faq-side p {
  color: var(--text-muted);
  margin-bottom: 20px;
}

.faq-contact-card {
  padding: 24px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
}

.faq-contact-card h4 {
  color: #fff;
  margin-bottom: 6px;
}

.faq-contact-card p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
  margin-bottom: 12px;
}

.faq-contact-card .btn {
  width: 100%;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(200, 160, 74, 0.35);
  box-shadow: var(--shadow-sm);
}

.accordion-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  background: none;
}

.accordion-btn i {
  color: var(--gold);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.accordion-item.open .accordion-btn i {
  transform: rotate(180deg);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.accordion-body-inner {
  padding: 0 24px 20px;
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.8;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

/* ===== CTA ===== */
.cta-section {
  padding: 0 0 96px;
}

.cta-box {
  position: relative;
  border-radius: 30px;
  padding: 72px 48px;
  background-image: url("/assets/images/backpic/back-3.png");
  background-size: cover;
  background-position: center;
  text-align: center;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.cta-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13, 27, 62, 0.92) 0%, rgba(13, 27, 62, 0.82) 100%);
}

.cta-content {
  position: relative;
  z-index: 5;
}

.cta-content h2 {
  color: #fff;
  font-size: 36px;
  margin-bottom: 14px;
}

.cta-content p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 16px;
  max-width: 560px;
  margin: 0 auto 32px;
}

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

/* ===== 页脚 ===== */
.site-footer {
  background: #0a1228;
  color: rgba(255, 255, 255, 0.7);
  padding: 68px 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .brand {
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.55);
  max-width: 380px;
}

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 3px;
  border-radius: 3px;
  background: var(--gold);
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  transition: var(--transition);
}

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

.footer-bottom {
  padding: 22px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.35);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .flow-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .security-wrap {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .faq-wrap {
    grid-template-columns: 1fr;
  }
  .faq-side {
    position: static;
  }
  .main-nav {
    display: none;
  }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--primary);
    padding: 16px 24px 24px;
    gap: 6px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  .nav-toggle {
    display: inline-flex;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 64px 0;
  }
  .banner-title {
    font-size: 32px;
  }
  .section-title {
    font-size: 28px;
  }
  .page-banner {
    padding: 130px 0 60px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .cta-box {
    padding: 48px 24px;
  }
  .security-list {
    grid-template-columns: 1fr;
  }
  .header-inner .btn-sm {
    display: none;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .brand {
    font-size: 17px;
  }
  .brand-icon {
    width: 32px;
    height: 32px;
    font-size: 14px;
  }
  .service-grid,
  .flow-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .flow-step::before {
    display: none;
  }
  .banner-title {
    font-size: 26px;
  }
  .banner-subtitle {
    font-size: 15px;
  }
  .section-head {
    margin-bottom: 36px;
  }
  .cta-buttons .btn {
    width: 100%;
    margin-bottom: 8px;
  }
  .stat-number {
    font-size: 32px;
  }
}