/* roulang page: index */
:root {
  --primary: #0a1628;
  --primary-light: #14273f;
  --accent: #e8362b;
  --accent2: #f5a623;
  --bg: #f6f9fc;
  --card: #ffffff;
  --text: #0d1b2a;
  --muted: #5e6e82;
  --border: #e1e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 12px 36px rgba(8, 20, 36, .08);
  --shadow-lg: 0 24px 60px rgba(8, 20, 36, .14);
  --container: 1200px;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; }
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-sm { padding: 56px 0; }
.text-muted { color: var(--muted); }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(232, 54, 43, .1);
  color: var(--accent);
  font-size: 13px; font-weight: 600;
  padding: 6px 14px; border-radius: 999px;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  border: 0; border-radius: 12px; padding: 13px 28px;
  font-size: 15px; font-weight: 600; line-height: 1.4;
  transition: all .25s ease;
}
.btn-primary {
  background: var(--accent); color: #fff;
  box-shadow: 0 8px 24px rgba(232, 54, 43, .3);
}
.btn-primary:hover { background: #c92a21; transform: translateY(-2px); box-shadow: 0 12px 30px rgba(232, 54, 43, .4); }
.btn-primary:active { transform: translateY(0); }
.btn-secondary {
  background: rgba(255,255,255,.08); color: #fff;
  border: 1px solid rgba(255,255,255,.2);
  backdrop-filter: blur(6px);
}
.btn-secondary:hover { background: rgba(255,255,255,.16); border-color: rgba(255,255,255,.35); transform: translateY(-2px); }
.btn-gold {
  background: var(--accent2); color: #1a1206;
  box-shadow: 0 8px 24px rgba(245, 166, 35, .3);
}
.btn-gold:hover { background: #e0960e; transform: translateY(-2px); box-shadow: 0 12px 30px rgba(245,166,35,.4); }
.btn-dark { background: var(--primary); color: #fff; }
.btn-dark:hover { background: var(--primary-light); transform: translateY(-2px); }
.btn:focus-visible, a:focus-visible, button:focus-visible {
  outline: 3px solid rgba(232, 54, 43, .5);
  outline-offset: 2px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform .3s ease, box-shadow .3s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.icon-circle {
  width: 54px; height: 54px; border-radius: 14px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 22px; color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  flex-shrink: 0;
}
.icon-circle.red { background: linear-gradient(135deg, var(--accent), #f05a50); }
.icon-circle.gold { background: linear-gradient(135deg, var(--accent2), #f7bb3e); }
.section-title { font-size: clamp(26px, 4vw, 40px); font-weight: 800; line-height: 1.25; letter-spacing: -.01em; }
.section-sub { font-size: 16px; color: var(--muted); max-width: 720px; }
.chip-tab {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 22px; border-radius: 999px;
  font-size: 14px; font-weight: 600;
  background: rgba(255,255,255,.85);
  color: var(--text);
  border: 1px solid var(--border);
  transition: all .25s ease;
  white-space: nowrap;
}
.chip-tab:hover { border-color: var(--accent); color: var(--accent); background: #fff; }
.chip-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.chip-tab i { font-size: 13px; }
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; gap: 20px;
}
.logo { display: flex; align-items: center; gap: 12px; font-weight: 800; font-size: 20px; color: var(--primary); line-height: 1.2; }
.logo-mark {
  width: 42px; height: 42px; border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), #233a5a);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent2); font-size: 18px;
  box-shadow: 0 6px 18px rgba(10,22,40,.2);
}
.nav-tabs { display: flex; gap: 10px; align-items: center; }
.nav-tabs a { font-size: 15px; font-weight: 500; color: var(--text); padding: 8px 18px; border-radius: 999px; transition: all .2s ease; }
.nav-tabs a:hover { color: var(--accent); background: rgba(232,54,43,.08); }
.nav-tabs a.active { color: #fff; background: var(--primary); font-weight: 600; }
.header-cta { display: flex; align-items: center; gap: 14px; }
.search-box {
  display: none;
  align-items: center; gap: 10px;
  background: #f0f4f8; border: 1px solid var(--border);
  border-radius: 999px; padding: 8px 16px; width: 200px;
  transition: all .25s ease;
}
.search-box:hover { border-color: var(--accent); background: #fff; }
.search-box i { color: var(--muted); font-size: 13px; }
.search-box input { border: 0; background: transparent; outline: none; font-size: 14px; width: 100%; }
.header-login-btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent); color: #fff;
  border-radius: 10px; padding: 9px 20px;
  font-size: 14px; font-weight: 600;
  transition: all .25s ease;
}
.header-login-btn:hover { background: #c92a21; transform: translateY(-1px); }
.mobile-toggle { display: none; background: none; border: 0; font-size: 22px; color: var(--primary); }
.mobile-menu {
  display: none;
  background: #fff; border-top: 1px solid var(--border);
  padding: 16px 24px;
}
.mobile-menu a { display: block; padding: 12px 8px; font-size: 15px; font-weight: 500; border-bottom: 1px solid var(--border); }
.mobile-menu a:last-child { border-bottom: 0; }
.mobile-menu a.active { color: var(--accent); }
.hero {
  position: relative;
  background: #081426 url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  color: #fff;
  padding: 110px 0 120px;
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(6, 14, 26, .94) 0%, rgba(10, 22, 40, .86) 45%, rgba(10, 22, 40, .55) 100%);
}
.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.1fr .9fr; gap: 60px; align-items: center; }
.hero-title { font-size: clamp(34px, 5.5vw, 58px); font-weight: 900; line-height: 1.15; letter-spacing: -.02em; }
.hero-title .highlight { color: var(--accent2); }
.hero-sub { margin-top: 22px; font-size: 17px; color: rgba(255,255,255,.85); max-width: 560px; }
.hero-actions { display: flex; gap: 16px; margin-top: 34px; flex-wrap: wrap; }
.hero-metrics {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 16px; padding: 24px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 18px;
  backdrop-filter: blur(8px);
  margin-top: 48px;
}
.metric-value { font-size: 26px; font-weight: 800; color: #fff; }
.metric-value span { color: var(--accent2); }
.metric-label { font-size: 13px; color: rgba(255,255,255,.72); margin-top: 2px; }
.hero-visual { position: relative; }
.hero-visual-main {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0,0,0,.45);
}
.hero-visual-main img { width: 100%; height: 380px; object-fit: cover; }
.hero-visual-overlay {
  position: absolute; left: 20px; right: 20px; bottom: 20px;
  background: rgba(255,255,255,.14); backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 14px; padding: 16px 20px;
  display: flex; align-items: center; justify-content: space-between;
  color: #fff;
}
.hero-visual-overlay .ov-title { font-weight: 700; font-size: 15px; }
.hero-visual-overlay .ov-desc { font-size: 12px; opacity: .85; }
.hero-visual-card {
  position: absolute; top: -20px; right: 12px;
  background: #fff; color: var(--text);
  border-radius: 14px; padding: 12px 18px;
  box-shadow: var(--shadow-lg);
  display: flex; align-items: center; gap: 10px;
  font-size: 13px; font-weight: 600;
}
.hero-visual-card i { color: var(--accent); font-size: 18px; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature-card { padding: 28px 24px; }
.feature-card p { margin-top: 12px; color: var(--muted); font-size: 14px; }
.feature-card h3 { margin-top: 18px; font-size: 18px; font-weight: 700; }
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.step-card {
  position: relative;
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 30px 24px;
  text-align: center; box-shadow: var(--shadow);
  transition: all .3s ease;
}
.step-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.step-num {
  width: 46px; height: 46px; border-radius: 14px;
  background: var(--primary); color: var(--accent2);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 20px; margin: 0 auto 16px;
}
.step-card h3 { font-size: 17px; font-weight: 700; }
.step-card p { font-size: 14px; color: var(--muted); margin-top: 8px; }
.dark-section {
  background: linear-gradient(135deg, #0a1628 0%, #12203a 100%);
  color: #fff; position: relative;
  overflow: hidden;
}
.dark-section::before {
  content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background: var(--primary) url('/assets/images/backpic/back-2.png') center / cover no-repeat;
  opacity: .3; pointer-events: none;
}
.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; position: relative; z-index: 2; }
.stat-row .stat-block { padding: 28px; border-radius: 18px; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12); backdrop-filter: blur(6px); text-align: center; }
.stat-block .stat-value { font-size: 42px; font-weight: 900; color: var(--accent2); line-height: 1.2; }
.stat-block .stat-value small { font-size: 20px; }
.stat-block .stat-label { font-size: 14px; color: rgba(255,255,255,.8); margin-top: 8px; letter-spacing: .04em; }
.category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.category-card { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: all .3s ease; }
.category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.category-card img { width: 100%; height: 220px; object-fit: cover; transition: transform .5s ease; }
.category-card:hover img { transform: scale(1.05); }
.category-card-body { position: absolute; inset: 0; background: linear-gradient(180deg, transparent 35%, rgba(6,14,26,.88) 100%); display: flex; flex-direction: column; justify-content: flex-end; padding: 24px; color: #fff; }
.category-card-body h3 { font-size: 20px; font-weight: 800; }
.category-card-body p { font-size: 14px; opacity: .88; margin-top: 6px; }
.category-card-body .cat-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 600; margin-top: 12px;
  color: var(--accent2); width: fit-content;
}
.cms-list { display: flex; flex-direction: column; gap: 16px; }
.cms-item {
  display: flex; align-items: center; gap: 18px;
  background: #fff; border: 1px solid var(--border);
  border-radius: 14px; padding: 20px 24px;
  transition: all .25s ease;
}
.cms-item:hover { border-color: var(--accent); box-shadow: var(--shadow); transform: translateX(4px); }
.cms-tag {
  background: var(--primary); color: #fff;
  font-size: 12px; font-weight: 600; border-radius: 6px;
  padding: 4px 10px; flex-shrink: 0;
}
.cms-info { flex: 1; min-width: 0; }
.cms-info h4 { font-size: 16px; font-weight: 700; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cms-info p { font-size: 14px; color: var(--muted); margin-top: 4px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cms-time { font-size: 13px; color: var(--muted); flex-shrink: 0; }
.cms-list-empty { background: #fff; border: 1px dashed var(--border); border-radius: 14px; padding: 40px; text-align: center; color: var(--muted); }
.faq-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.faq-item { background: #fff; border: 1px solid var(--border); border-radius: 14px; overflow: hidden; transition: all .25s ease; }
.faq-item:hover { border-color: var(--accent2); }
.faq-question { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 24px; cursor: pointer; font-weight: 600; font-size: 16px; }
.faq-question i { color: var(--accent); transition: transform .3s ease; }
.faq-item.open .faq-question i { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; padding: 0 24px; color: var(--muted); font-size: 14px; transition: max-height .35s ease, padding .35s ease; }
.faq-item.open .faq-answer { max-height: 400px; padding: 4px 24px 20px; }
.cta-section {
  background: linear-gradient(120deg, #081426, #1a2c4a), url('/assets/images/backpic/back-3.png') center / cover;
  position: relative;
}
.cta-card {
  position: relative; z-index: 2;
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.14);
  backdrop-filter: blur(10px);
  border-radius: 24px; padding: 60px 40px;
  display: flex; align-items: center; justify-content: space-between; gap: 40px;
  flex-wrap: wrap;
}
.cta-card h2 { color: #fff; font-size: clamp(24px, 3.5vw, 36px); font-weight: 800; }
.cta-card p { color: rgba(255,255,255,.8); margin-top: 10px; max-width: 520px; }
.recommend-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.recommend-card { overflow: hidden; }
.recommend-card .rec-img { width: 100%; height: 170px; object-fit: cover; }
.recommend-card-body { padding: 22px; }
.recommend-card-body .badge { margin-bottom: 10px; }
.recommend-card-body h3 { font-size: 17px; font-weight: 700; margin-top: 8px; }
.recommend-card-body p { font-size: 14px; color: var(--muted); margin-top: 8px; }
.footer {
  background: #08111f;
  color: rgba(255,255,255,.75);
  padding: 70px 0 30px;
  font-size: 14px;
}
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 48px; }
.footer .logo { color: #fff; }
.footer-desc { margin-top: 18px; max-width: 360px; line-height: 1.8; font-size: 14px; }
.footer h4 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 18px; }
.footer ul { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.footer ul a { transition: all .2s ease; }
.footer ul a:hover { color: var(--accent2); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  margin-top: 48px; padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px;
  font-size: 13px;
}
.footer-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.footer-tags span {
  background: rgba(255,255,255,.08);
  padding: 4px 12px; border-radius: 999px;
  font-size: 12px;
}
@media (max-width: 1024px) {
  .section { padding: 72px 0; }
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero { padding: 80px 0 90px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .recommend-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-metrics { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 54px 0; }
  .header-cta .search-box { display: none; }
  .nav-tabs { display: none; }
  .mobile-toggle { display: block; }
  .mobile-menu.show { display: block; }
  .header-login-btn { display: none; }
  .feature-grid, .steps-grid { grid-template-columns: 1fr; }
  .category-grid, .recommend-grid { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: 1fr; }
  .hero-metrics { grid-template-columns: 1fr; }
  .cms-item { flex-wrap: wrap; }
  .cms-time { margin-left: auto; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .cta-card { padding: 36px 24px; flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .metric-value { font-size: 22px; }
  .section-title { font-size: 26px; }
  .faq-question { font-size: 15px; }
}

/* roulang page: category1 */
:root {
            --primary: #2563eb;
            --primary-dark: #1e40af;
            --primary-light: #93c5fd;
            --accent: #7c3aed;
            --bg-dark: #0b1220;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.14);
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            background: #fff;
            color: var(--text-main);
            line-height: 1.7;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }
        body {
            padding-top: 72px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .site-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            height: 72px;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--text-main);
            letter-spacing: -0.03em;
        }
        .logo-mark {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
        }
        .nav-tabs {
            display: flex;
            gap: 4px;
            align-items: center;
            background: #f1f5f9;
            padding: 4px;
            border-radius: 14px;
        }
        .nav-tabs a {
            padding: 8px 18px;
            border-radius: 10px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--text-muted);
            text-decoration: none;
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .nav-tabs a:hover {
            color: var(--primary);
            background: rgba(255, 255, 255, 0.7);
        }
        .nav-tabs a.active {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 2px 8px rgba(15, 23, 42, 0.06);
        }
        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 12px;
            font-weight: 600;
            font-size: 0.9375rem;
            text-decoration: none;
            transition: all 0.25s ease;
            cursor: pointer;
            border: 2px solid transparent;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            color: #fff;
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline:hover {
            background: rgba(37, 99, 235, 0.06);
            transform: translateY(-2px);
        }
        .btn-light {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(255, 255, 255, 0.15);
        }
        .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 255, 255, 0.25);
        }
        .page-hero {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #172554 100%);
            color: #fff;
            padding: 96px 0 64px;
            position: relative;
            overflow: hidden;
        }
        .page-hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
        }
        .edge-pattern {
            position: absolute;
            bottom: -1px;
            left: 0;
            right: 0;
            height: 60px;
            background: #fff;
            border-radius: 100% 100% 0 0;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(37, 99, 235, 0.2);
            border: 1px solid rgba(96, 165, 250, 0.35);
            color: #93c5fd;
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 0.8125rem;
            font-weight: 600;
            backdrop-filter: blur(8px);
        }
        .section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }
        .section-title .kicker {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.12em;
            color: var(--primary);
            background: rgba(37, 99, 235, 0.08);
            padding: 6px 14px;
            border-radius: 40px;
            margin-bottom: 16px;
        }
        .section-title h2 {
            font-size: 2.25rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.04em;
            margin-bottom: 16px;
            color: var(--text-main);
        }
        .section-title p {
            font-size: 1.0625rem;
            color: var(--text-muted);
        }
        .glass-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 20px;
            backdrop-filter: blur(12px);
            padding: 24px;
            transition: all 0.3s ease;
        }
        .glass-card:hover {
            border-color: rgba(96, 165, 250, 0.3);
            background: rgba(255, 255, 255, 0.07);
            transform: translateY(-4px);
        }
        .step-card {
            position: relative;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 32px 24px 24px;
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
        }
        .step-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
        }
        .step-number {
            position: absolute;
            top: -16px;
            left: 24px;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 12px;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1rem;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
        }
        .tag-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 40px;
            background: #eff6ff;
            color: var(--primary);
            border: 1px solid #bfdbfe;
        }
        .use-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 28px 24px;
            transition: all 0.3s ease;
            box-shadow: var(--shadow);
        }
        .use-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .use-card .icon-wrap {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
        }
        .bg-blue {
            background: #eff6ff;
            color: var(--primary);
        }
        .bg-purple {
            background: #f3e8ff;
            color: #7c3aed;
        }
        .bg-green {
            background: #ecfdf5;
            color: #059669;
        }
        .bg-amber {
            background: #fffbeb;
            color: #d97706;
        }
        .dark-cta {
            background: linear-gradient(135deg, #0f172a, #1e3a8a);
            position: relative;
            overflow: hidden;
        }
        .dark-cta::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(96, 165, 250, 0.15), transparent 60%);
            border-radius: 50%;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 24px 28px;
            margin-bottom: 12px;
            transition: all 0.25s ease;
        }
        .faq-item:hover {
            border-color: #bfdbfe;
            box-shadow: var(--shadow);
        }
        .faq-item summary {
            cursor: pointer;
            font-weight: 700;
            font-size: 1rem;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-main);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--primary);
            transition: transform 0.3s ease;
            font-size: 0.875rem;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item .answer {
            margin-top: 14px;
            color: var(--text-muted);
            font-size: 0.9375rem;
            line-height: 1.8;
            border-top: 1px solid #f1f5f9;
            padding-top: 14px;
        }
        .data-block {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            justify-content: center;
            margin-top: 32px;
        }
        .data-item {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 16px;
            padding: 20px 32px;
            text-align: center;
            min-width: 140px;
            transition: all 0.3s ease;
        }
        .data-item:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(96, 165, 250, 0.3);
        }
        .data-item .num {
            font-size: 2rem;
            font-weight: 800;
            color: #60a5fa;
            line-height: 1.2;
        }
        .data-item .label {
            font-size: 0.8125rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }
        .article-card {
            background: #fff;
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
        }
        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
        }
        .article-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .article-card .card-body {
            padding: 24px;
        }
        .footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.8);
            padding: 64px 0 0;
            margin-top: 0;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer .logo {
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-desc {
            font-size: 0.875rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
            margin-top: 12px;
        }
        .footer h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer ul li {
            margin-bottom: 10px;
        }
        .footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            font-size: 0.875rem;
            transition: color 0.2s;
        }
        .footer ul li a:hover {
            color: #93c5fd;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.8125rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-tags {
            display: flex;
            gap: 12px;
        }
        .footer-tags span {
            padding: 4px 12px;
            border-radius: 40px;
            background: rgba(255, 255, 255, 0.06);
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .mobile-toggle {
            display: none;
        }
        .main-content {
            padding: 0 0 40px;
        }
        @media (max-width: 1024px) {
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .section {
                padding: 64px 0;
            }
        }
        @media (max-width: 768px) {
            body {
                padding-top: 64px;
            }
            .site-header {
                height: 64px;
            }
            .mobile-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
                width: 40px;
                height: 40px;
                border-radius: 10px;
                background: #f1f5f9;
                border: none;
                cursor: pointer;
                color: var(--text-main);
                font-size: 1.125rem;
            }
            .nav-tabs {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: #fff;
                padding: 12px 16px;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
                display: none;
                border-radius: 0;
                z-index: 99;
            }
            .nav-tabs.open {
                display: flex;
            }
            .nav-tabs a {
                padding: 12px 16px;
                text-align: center;
                border-radius: 10px;
            }
            .header-cta .btn {
                display: none;
            }
            .section-title h2 {
                font-size: 1.75rem;
            }
            .page-hero {
                padding: 64px 0 48px;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .step-card {
                padding: 24px 16px 20px;
            }
            .section {
                padding: 48px 0;
            }
            .section-title h2 {
                font-size: 1.5rem;
            }
        }

/* roulang page: article */
:root {
  --brand: #2862ff;
  --brand-dark: #1746c4;
  --brand-light: #eaf0ff;
  --accent: #ffb020;
  --accent-dark: #e08e00;
  --ink: #0b1221;
  --text: #1f2937;
  --muted: #64748b;
  --line: #e5eaf3;
  --bg: #f5f7fc;
  --card: #ffffff;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { font-family: inherit; }

.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

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

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

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.3px;
}

.logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--brand) 0%, #7c3aed 100%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  box-shadow: 0 6px 16px rgba(40, 98, 255, 0.35);
}

.nav-tabs {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px;
  background: #f1f4fa;
  border-radius: 999px;
}

.nav-tabs a {
  padding: 9px 20px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: #475569;
  transition: background .2s, color .2s, box-shadow .2s;
  white-space: nowrap;
}

.nav-tabs a:hover {
  color: var(--brand-dark);
  background: #fff;
}

.nav-tabs a.active {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 4px 14px rgba(40, 98, 255, 0.3);
}

.nav-cta {
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  font-size: 18px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color .2s, box-shadow .2s;
}

.nav-toggle:hover {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-light);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .2s, box-shadow .2s, background .2s, border-color .2s;
  white-space: nowrap;
}

.btn:hover { transform: translateY(-2px); }
.btn:focus-visible { outline: 3px solid var(--brand-light); outline-offset: 2px; }

.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 4px 14px rgba(40, 98, 255, 0.25);
}

.btn-primary:hover {
  background: var(--brand-dark);
  box-shadow: 0 8px 22px rgba(40, 98, 255, 0.35);
}

.btn-accent {
  background: var(--accent);
  color: #0b1221;
  box-shadow: 0 4px 16px rgba(255, 176, 32, 0.3);
}

.btn-accent:hover {
  background: #ffc533;
  box-shadow: 0 8px 24px rgba(255, 176, 32, 0.4);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(4px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.6);
}

.btn-sm { padding: 8px 16px; font-size: 13px; border-radius: 10px; }

/* ===== Page Hero ===== */
.page-hero {
  position: relative;
  background-size: cover;
  background-position: center;
  padding: 72px 0;
  color: #fff;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(6, 12, 32, 0.9) 0%, rgba(18, 34, 84, 0.76) 100%);
}

.page-hero .container {
  position: relative;
  z-index: 1;
}

.hero-breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 18px;
  background: rgba(255, 255, 255, 0.1);
  padding: 6px 14px;
  border-radius: 999px;
  backdrop-filter: blur(6px);
}

.hero-breadcrumb a { color: rgba(255, 255, 255, 0.85); }
.hero-breadcrumb a:hover { color: #fff; }

.page-hero #pageTopicTitle,
.page-hero .page-hero-title {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -1px;
  margin: 0 0 12px;
}

.page-hero .page-hero-desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.82);
  max-width: 640px;
  margin: 0;
}

/* ===== Article Layout ===== */
.article-section {
  padding: 60px 0 20px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 32px;
  align-items: start;
}

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

.article-cat {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--brand-light);
  color: var(--brand-dark);
  font-size: 13px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.article-card h1 {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.35;
  color: var(--ink);
  letter-spacing: -0.5px;
  margin: 0 0 18px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--muted);
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 26px;
}

.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-cover {
  width: 100%;
  height: auto;
  border-radius: 16px;
  margin-bottom: 28px;
  box-shadow: var(--shadow-sm);
}

.article-body {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text);
}

.article-body h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
  margin: 36px 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.article-body h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
  margin: 28px 0 12px;
}

.article-body p { margin: 16px 0; }
.article-body ul { margin: 16px 0; padding-left: 24px; list-style: disc; }
.article-body ol { margin: 16px 0; padding-left: 24px; list-style: decimal; }
.article-body li { margin: 8px 0; }

.article-body blockquote {
  border-left: 4px solid var(--brand);
  background: var(--brand-light);
  padding: 16px 20px;
  border-radius: 0 12px 12px 0;
  color: #1e3a8a;
  margin: 24px 0;
}

.article-body img { border-radius: 14px; margin: 20px 0; }
.article-body a { color: var(--brand); text-decoration: underline; text-underline-offset: 4px; }
.article-body code {
  background: #eef1f7;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 14px;
}

/* ===== Sidebar ===== */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 22px;
  position: sticky;
  top: 92px;
}

.side-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  padding: 24px;
}

.side-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 12px;
}

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

.side-link {
  font-size: 14px;
  font-weight: 700;
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.side-link:hover { color: var(--brand-dark); }

.side-guide img {
  width: 100%;
  height: 130px;
  object-fit: cover;
  border-radius: 12px;
  margin-bottom: 16px;
}

.side-guide p { margin-bottom: 16px; }

.side-tip ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.side-tip li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 14px;
  color: var(--text);
}

.side-tip li i {
  color: #10b981;
  margin-top: 3px;
}

/* ===== Not Found ===== */
.notfound-section {
  padding: 80px 0;
}

.notfound-card {
  max-width: 560px;
  margin: 0 auto;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 56px 40px;
  text-align: center;
}

.notfound-card i {
  font-size: 48px;
  color: var(--accent);
  margin-bottom: 18px;
}

.notfound-card h1 {
  font-size: 30px;
  font-weight: 800;
  color: var(--ink);
  margin: 0 0 12px;
}

.notfound-card p {
  color: var(--muted);
  font-size: 15px;
  margin: 0 0 24px;
}

/* ===== Related ===== */
.related-section {
  padding: 60px 0;
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 32px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--brand);
  letter-spacing: 1px;
}

.section-head h2 {
  font-size: 30px;
  font-weight: 800;
  color: var(--ink);
  margin: 0;
  letter-spacing: -0.5px;
}

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

.related-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform .25s, box-shadow .25s;
  display: flex;
  flex-direction: column;
}

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

.related-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  transition: transform .4s;
}

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

.related-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.label {
  display: inline-block;
  background: var(--brand-light);
  color: var(--brand-dark);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
  width: fit-content;
}

.related-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 10px;
  line-height: 1.4;
}

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

.related-more {
  font-size: 14px;
  font-weight: 700;
  color: var(--brand);
  margin-top: auto;
  transition: color .2s;
}

.related-card:hover .related-more { color: var(--accent-dark); }

/* ===== Performance Strip ===== */
.performance-strip {
  position: relative;
  background-size: cover;
  background-position: center;
  padding: 70px 0;
  color: #fff;
}

.performance-strip::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(7, 13, 30, 0.88);
}

.performance-strip .container {
  position: relative;
  z-index: 1;
}

.performance-strip .section-head h2 {
  color: #fff;
}

.performance-strip .section-tag { color: var(--accent); }

.perf-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 36px;
}

.perf-item {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 20px;
  padding: 32px 24px;
  text-align: center;
  transition: background .3s, border-color .3s, transform .3s;
}

.perf-item:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 176, 32, 0.5);
  transform: translateY(-4px);
}

.perf-num {
  display: block;
  font-size: 42px;
  font-weight: 900;
  color: var(--accent);
  letter-spacing: -1px;
  margin-bottom: 6px;
}

.perf-label {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.82);
}

/* ===== FAQ ===== */
.faq-section {
  padding: 70px 0;
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow .2s;
}

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

.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

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

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

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

.faq-item[open] summary { color: var(--brand-dark); }

.faq-answer {
  padding: 0 24px 22px;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
}

.faq-answer a { color: var(--brand); text-decoration: underline; }

/* ===== CTA ===== */
.cta-section {
  position: relative;
  background-size: cover;
  background-position: center;
  padding: 80px 0;
  color: #fff;
  text-align: center;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11, 18, 33, 0.92), rgba(23, 52, 146, 0.82));
}

.cta-section .container { position: relative; z-index: 1; }

.cta-box h2 {
  font-size: 34px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.8px;
  margin: 0 0 14px;
}

.cta-box p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.82);
  max-width: 560px;
  margin: 0 auto 30px;
}

.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

/* ===== Footer ===== */
.footer {
  background: var(--ink);
  color: #cbd5e1;
  padding: 60px 0 30px;
}

.footer .logo {
  color: #fff;
  font-size: 18px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  margin: 16px 0 0;
  max-width: 360px;
}

.footer h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin: 0 0 18px;
}

.footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  transition: color .2s, padding-left .2s;
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 28px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

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

.footer-tags span {
  background: rgba(255, 255, 255, 0.08);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: minmax(0, 1fr) 300px;
  }

  .article-card { padding: 32px; }

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

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

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

  .nav-tabs {
    position: absolute;
    top: 100%;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    padding: 10px;
    margin-top: 0;
  }

  .nav-tabs.open {
    display: flex;
  }

  .nav-tabs a {
    text-align: center;
    border-radius: 10px;
    padding: 12px;
  }

  .page-hero { padding: 52px 0; }

  .page-hero .page-hero-title,
  .page-hero #pageTopicTitle { font-size: 30px; }

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

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

  .article-card { padding: 24px; }

  .article-card h1 { font-size: 26px; }

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

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

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

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

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

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

@media (max-width: 520px) {
  .header-inner { height: 64px; }

  .logo { font-size: 17px; }

  .logo-mark {
    width: 34px;
    height: 34px;
    font-size: 14px;
  }

  .nav-tabs { left: 12px; right: 12px; }

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

  .page-hero .page-hero-title { font-size: 26px; }

  .page-hero .page-hero-desc { font-size: 14px; }

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

  .article-meta { gap: 10px; }

  .article-card h1 { font-size: 22px; }

  .related-body { padding: 18px; }

  .faq-item summary { padding: 16px 18px; }

  .faq-answer { padding: 0 18px 18px; }
}