/* roulang page: index */
:root {
  --primary: #0F6B62;
  --primary-hover: #0B534D;
  --primary-active: #083F3A;
  --accent: #D49A2A;
  --accent-hover: #B88223;
  --accent-active: #9E6F1C;
  --bg: #F7F8F6;
  --dark: #102A2C;
  --dark-deep: #0E2324;
  --card: #FFFFFF;
  --text: #1E2A2A;
  --text-secondary: #5B6B6B;
  --text-muted: #8A9A98;
  --border: #E3E8E6;
  --success: #2A9D6E;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow-card: 0 1px 3px rgba(15,107,98,0.06), 0 4px 12px rgba(15,107,98,0.04);
  --shadow-hover: 0 4px 8px rgba(15,107,98,0.08), 0 12px 24px rgba(15,107,98,0.06);
  --shadow-nav: 0 2px 8px rgba(16,42,44,0.06);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-header { margin-bottom: 48px; }
.section-title { font-size: 32px; font-weight: 700; line-height: 1.35; color: var(--text); position: relative; padding-left: 16px; }
.section-title::before { content: ""; position: absolute; left: 0; top: 6px; width: 4px; height: 28px; background: var(--primary); border-radius: 2px; }
.section-desc { font-size: 16px; color: var(--text-secondary); margin-top: 12px; max-width: 600px; }

/* Header */
.site-header { background: rgba(255,255,255,0.98); border-bottom: 1px solid var(--border); height: 72px; position: sticky; top: 0; z-index: 100; transition: box-shadow 0.3s; }
.site-header.scrolled { box-shadow: var(--shadow-nav); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 24px; }
.logo { font-size: 22px; font-weight: 700; color: var(--text); letter-spacing: -0.5px; display: flex; align-items: center; gap: 10px; }
.logo-icon { width: 36px; height: 36px; background: var(--primary); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 800; font-size: 18px; flex-shrink: 0; }
.logo-text { white-space: nowrap; }
.main-nav { display: flex; align-items: center; }
.nav-list { display: flex; list-style: none; gap: 8px; }
.nav-link { display: inline-block; padding: 8px 16px; font-size: 15px; font-weight: 500; color: var(--text-secondary); border-radius: var(--radius-sm); position: relative; transition: color 0.2s; }
.nav-link:hover { color: var(--primary); }
.nav-link.active { color: var(--primary); font-weight: 600; }
.nav-link.active::after { content: ""; position: absolute; left: 16px; right: 16px; bottom: 0; height: 2px; background: var(--primary); border-radius: 2px; }
.header-actions { display: flex; align-items: center; gap: 12px; }
.login-link { font-size: 14px; color: var(--text-secondary); display: inline-flex; align-items: center; gap: 6px; font-weight: 500; transition: color 0.2s; }
.login-link:hover { color: var(--primary); }
.login-link svg { width: 16px; height: 16px; }
.menu-toggle { display: none; width: 40px; height: 40px; border-radius: 8px; flex-direction: column; align-items: center; justify-content: center; gap: 5px; transition: background 0.2s; }
.menu-toggle:hover { background: rgba(15,107,98,0.06); }
.menu-toggle span { display: block; width: 20px; height: 2px; background: var(--text); border-radius: 2px; transition: all 0.3s ease; }
.menu-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile menu */
.mobile-menu { position: fixed; top: 0; right: -100%; width: 320px; height: 100vh; background: var(--dark); z-index: 200; transition: right 0.35s ease; padding: 24px; display: flex; flex-direction: column; }
.mobile-menu.open { right: 0; }
.mobile-menu-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 40px; }
.mobile-menu .logo { color: #fff; }
.mobile-menu-close { color: rgba(255,255,255,0.7); font-size: 24px; width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; border-radius: 8px; }
.mobile-menu-close:hover { background: rgba(255,255,255,0.1); }
.mobile-nav-list { list-style: none; display: flex; flex-direction: column; gap: 4px; }
.mobile-nav-link { display: block; padding: 14px 12px; font-size: 18px; font-weight: 500; color: #C6D4D2; border-radius: 8px; transition: background 0.2s, color 0.2s; }
.mobile-nav-link:hover { background: rgba(255,255,255,0.06); color: #fff; }
.mobile-nav-link.active { color: var(--accent); }
.mobile-menu-cta { margin-top: auto; display: flex; flex-direction: column; gap: 12px; }
.mobile-menu-overlay { position: fixed; inset: 0; background: rgba(16,42,44,0.5); z-index: 190; opacity: 0; visibility: hidden; transition: opacity 0.3s; }
.mobile-menu-overlay.open { opacity: 1; visibility: visible; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-size: 15px; font-weight: 600; border-radius: var(--radius-md); padding: 12px 24px; min-height: 44px; transition: all 0.15s ease-out; line-height: 1.4; }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn-primary { background: var(--accent); color: var(--dark); }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-primary:active { background: var(--accent-active); transform: translateY(0); }
.btn-outline { border: 1px solid var(--primary); color: var(--primary); background: transparent; }
.btn-outline:hover { background: rgba(15,107,98,0.06); }
.btn-outline:active { background: rgba(15,107,98,0.1); }
.btn-outline-light { border: 1px solid rgba(255,255,255,0.65); color: #fff; background: transparent; }
.btn-outline-light:hover { background: rgba(255,255,255,0.1); border-color: #fff; }
.btn-outline-light:active { background: rgba(255,255,255,0.16); }
.btn-lg { padding: 16px 34px; font-size: 16px; min-height: 52px; }
.btn-sm { padding: 8px 18px; font-size: 14px; min-height: 38px; }

/* Hero */
.hero { position: relative; min-height: 92vh; background: var(--dark); display: flex; align-items: center; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-1.png'); background-size: cover; background-position: center; opacity: 0.35; }
.hero-bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(16,42,44,0.96) 0%, rgba(16,42,44,0.82) 50%, rgba(16,42,44,0.55) 100%); }
.hero-grid-overlay { position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px); background-size: 48px 48px; pointer-events: none; }
.hero-content { position: relative; z-index: 2; max-width: 720px; padding: 80px 0; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.14); padding: 6px 16px; border-radius: 999px; font-size: 13px; color: #A8B8B6; margin-bottom: 32px; }
.status-dot { width: 8px; height: 8px; background: var(--success); border-radius: 50%; position: relative; }
.status-dot::after { content: ""; position: absolute; inset: -4px; background: rgba(42,157,110,0.3); border-radius: 50%; }
.hero-title { font-size: 42px; font-weight: 700; line-height: 1.3; color: #fff; letter-spacing: -0.5px; margin-bottom: 20px; }
.hero-subtitle { font-size: 18px; color: #A8B8B6; line-height: 1.8; max-width: 600px; margin-bottom: 36px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 40px; }
.hero-trust { display: flex; gap: 24px; flex-wrap: wrap; font-size: 14px; color: #8FA8A5; }
.hero-trust span { display: inline-flex; align-items: center; gap: 6px; }
.hero-trust span::before { content: "✓"; color: var(--success); font-weight: 700; }

/* Trust bar */
.trust-bar { background: var(--dark); border-top: 1px solid rgba(255,255,255,0.08); border-bottom: 1px solid rgba(255,255,255,0.08); padding: 24px 0; }
.trust-bar-inner { display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.trust-item { flex: 1; text-align: center; padding: 8px 16px; position: relative; }
.trust-item:not(:last-child)::after { content: ""; position: absolute; right: 0; top: 50%; transform: translateY(-50%); width: 1px; height: 32px; background: rgba(255,255,255,0.12); }
.trust-value { font-size: 32px; font-weight: 700; color: #fff; line-height: 1.3; font-feature-settings: "tnum"; }
.trust-label { font-size: 13px; color: #8FA8A5; margin-top: 4px; }

/* Feature blocks */
.feature-section { background: var(--bg); }
.feature-block { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; margin-bottom: 80px; }
.feature-block:last-child { margin-bottom: 0; }
.feature-block.reverse .feature-image { order: 2; }
.feature-block.reverse .feature-content { order: 1; }
.feature-image { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-card); }
.feature-image img { width: 100%; height: 300px; object-fit: cover; }
.feature-tag { display: inline-block; background: rgba(15,107,98,0.08); color: var(--primary); font-size: 13px; font-weight: 600; padding: 4px 12px; border-radius: var(--radius-sm); margin-bottom: 16px; }
.feature-title { font-size: 24px; font-weight: 700; color: var(--text); margin-bottom: 14px; line-height: 1.4; }
.feature-desc { font-size: 15px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 20px; }
.feature-link { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 600; color: var(--primary); transition: color 0.2s, gap 0.2s; }
.feature-link:hover { color: var(--primary-hover); gap: 10px; }
.feature-link::after { content: "→"; }

/* Steps */
.steps-section { background: var(--dark); color: #fff; position: relative; overflow: hidden; }
.steps-section .section-title { color: #fff; }
.steps-section .section-title::before { background: var(--accent); }
.steps-section .section-desc { color: #A8B8B6; }
.steps-bg { position: absolute; right: -120px; top: 50%; transform: translateY(-50%); width: 500px; height: 500px; opacity: 0.04; background-image: url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; border-radius: 50%; }
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; position: relative; z-index: 2; }
.step-item { padding: 32px; background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.1); border-radius: var(--radius-lg); transition: background 0.2s, border-color 0.2s; }
.step-item:hover { background: rgba(255,255,255,0.07); border-color: rgba(255,255,255,0.16); }
.step-number { font-size: 42px; font-weight: 800; color: var(--accent); line-height: 1; margin-bottom: 16px; font-feature-settings: "tnum"; }
.step-title { font-size: 18px; font-weight: 600; margin-bottom: 10px; color: #fff; }
.step-desc { font-size: 14px; color: #A8B8B6; line-height: 1.7; }

/* CMS List */
.cms-list { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; }
.cms-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-card); transition: box-shadow 0.2s, transform 0.2s; }
.cms-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.cms-card .card-link { display: flex; flex-direction: column; height: 100%; }
.card-thumb { height: 160px; background: var(--border); display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden; }
.card-thumb::after { content: "▤ 资讯"; position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 14px; color: var(--text-muted); background: linear-gradient(135deg, rgba(227,232,230,0.6), rgba(15,107,98,0.05)); }
.card-thumb span { position: relative; z-index: 2; font-size: 14px; font-weight: 600; color: var(--primary); background: rgba(255,255,255,0.9); padding: 4px 12px; border-radius: 999px; box-shadow: 0 2px 8px rgba(0,0,0,0.06); }
.card-body { padding: 20px 24px 24px; flex: 1; display: flex; flex-direction: column; }
.tag { display: inline-block; background: rgba(15,107,98,0.08); color: var(--primary); font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: var(--radius-sm); margin-bottom: 12px; align-self: flex-start; }
.card-title { font-size: 18px; font-weight: 600; color: var(--text); line-height: 1.5; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-excerpt { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; flex: 1; }
.card-meta { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-muted); font-feature-settings: "tnum"; }
.card-meta .dot { width: 3px; height: 3px; background: var(--border); border-radius: 50%; }
.empty-state { grid-column: 1 / -1; background: var(--bg); border: 1px dashed var(--border); border-radius: var(--radius-lg); padding: 64px; text-align: center; }
.empty-state .empty-icon { width: 56px; height: 56px; border: 2px dashed var(--border); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 14px; color: var(--text-muted); margin: 0 auto 16px; }
.empty-state p { font-size: 15px; color: var(--text-secondary); margin-bottom: 20px; }

/* Testimonials */
.testimonials-section { background: var(--bg); }
.testimonials-summary { font-size: 18px; color: var(--text-secondary); text-align: center; margin-bottom: 48px; }
.testimonials-summary strong { color: var(--primary); font-weight: 700; }
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.testimonial-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 28px; box-shadow: var(--shadow-card); position: relative; transition: box-shadow 0.2s, transform 0.2s; }
.testimonial-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.testimonial-card::before { content: ""; position: absolute; top: 20px; left: 24px; font-size: 48px; color: var(--primary); opacity: 0.12; font-family: Georgia, serif; line-height: 1; }
.testimonial-text { font-size: 14px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 20px; }
.testimonial-user { display: flex; align-items: center; gap: 12px; }
.testimonial-avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 700; flex-shrink: 0; }
.testimonial-avatar.alt { background: var(--accent); color: var(--dark); }
.testimonial-name { font-size: 14px; font-weight: 600; color: var(--text); }
.testimonial-role { font-size: 12px; color: var(--text-muted); }

/* FAQ */
.faq-section { background: var(--card); }
.faq-container { max-width: 800px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item:first-child { border-top: 1px solid var(--border); }
.faq-question { display: flex; justify-content: space-between; align-items: center; padding: 24px; cursor: pointer; transition: background 0.2s; }
.faq-question:hover { background: rgba(15,107,98,0.02); }
.faq-question h3 { font-size: 16px; font-weight: 600; color: var(--text); line-height: 1.5; }
.faq-icon { width: 28px; height: 28px; border-radius: 50%; background: rgba(15,107,98,0.08); display: flex; align-items: center; justify-content: center; position: relative; transition: transform 0.3s, background 0.3s; flex-shrink: 0; }
.faq-icon::before, .faq-icon::after { content: ""; position: absolute; background: var(--primary); border-radius: 2px; transition: transform 0.3s; }
.faq-icon::before { width: 12px; height: 2px; }
.faq-icon::after { width: 2px; height: 12px; }
.faq-item.open .faq-icon { transform: rotate(45deg); background: rgba(212,154,42,0.15); }
.faq-item.open .faq-icon::before, .faq-item.open .faq-icon::after { background: var(--accent); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.faq-answer-inner { padding: 0 24px 24px; border-left: 3px solid var(--primary); margin: 0 24px 0 24px; }
.faq-answer p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; }

/* CTA section */
.cta-section { background: var(--dark); padding: 56px 0; position: relative; overflow: hidden; }
.cta-section::after { content: ""; position: absolute; right: -120px; top: -120px; width: 360px; height: 360px; border-radius: 50%; background: radial-gradient(circle, rgba(15,107,98,0.08) 0%, transparent 60%); }
.cta-content { position: relative; z-index: 2; text-align: center; max-width: 680px; margin: 0 auto; }
.cta-title { font-size: 32px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.cta-subtitle { font-size: 16px; color: #A8B8B6; margin-bottom: 32px; }
.cta-actions { display: flex; justify-content: center; gap: 16px; margin-bottom: 32px; flex-wrap: wrap; }
.cta-security { display: flex; justify-content: center; gap: 24px; font-size: 14px; color: #7A9491; flex-wrap: wrap; }
.cta-security span { display: inline-flex; align-items: center; gap: 6px; }
.cta-security span::before { content: "•"; color: var(--accent); font-size: 18px; }

/* Fixed CTA */
.fixed-cta { position: fixed; bottom: 24px; right: 24px; z-index: 150; background: var(--dark); border-radius: 999px; box-shadow: var(--shadow-hover); padding: 8px 20px; display: none; align-items: center; gap: 12px; border: 1px solid rgba(255,255,255,0.1); }
.fixed-cta .text { font-size: 13px; color: #A8B8B6; }
.fixed-cta .btn { padding: 8px 20px; min-height: 38px; font-size: 14px; }

/* Mobile bottom bar */
.mobile-bottom-bar { display: none; position: fixed; bottom: 0; left: 0; right: 0; height: 64px; background: var(--dark); z-index: 150; box-shadow: 0 -4px 16px rgba(16,42,44,0.3); padding: 8px 16px; align-items: center; gap: 12px; }
.mobile-bottom-bar .text { font-size: 13px; color: #A8B8B6; flex-shrink: 0; }
.mobile-bottom-bar .btn { flex: 1; }

/* Footer */
.site-footer { background: var(--dark-deep); color: #C6D4D2; padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 48px; padding-bottom: 48px; }
.footer-logo { font-size: 20px; font-weight: 700; color: #fff; display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-logo .logo-icon { background: var(--accent); color: var(--dark); }
.footer-desc { font-size: 14px; color: #7A9491; line-height: 1.7; margin-bottom: 20px; max-width: 300px; }
.footer-security { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: #7A9491; border: 1px solid rgba(255,255,255,0.1); padding: 6px 14px; border-radius: 999px; }
.footer-security svg { width: 14px; height: 14px; color: var(--success); }
.footer-title { font-size: 16px; font-weight: 600; color: #fff; margin-bottom: 20px; }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.footer-links a { font-size: 14px; color: #7A9491; transition: color 0.2s; }
.footer-links a:hover { color: var(--accent); }
.footer-contact { list-style: none; display: flex; flex-direction: column; gap: 12px; font-size: 14px; color: #7A9491; }
.footer-contact li { display: flex; align-items: center; gap: 10px; }
.footer-contact svg { width: 16px; height: 16px; flex-shrink: 0; opacity: 0.7; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 24px 0; display: flex; justify-content: space-between; align-items: center; gap: 16px; font-size: 13px; color: #7A9491; flex-wrap: wrap; }

/* Responsive */
@media (max-width: 1024px) {
  .main-nav, .header-actions .login-link, .header-actions .btn { display: none; }
  .menu-toggle { display: flex; }
  .cms-list { grid-template-columns: repeat(2, 1fr); }
  .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .feature-block { gap: 40px; }
}
@media (max-width: 768px) {
  .section { padding: 48px 0; }
  .section-title { font-size: 26px; }
  .hero { min-height: 90vh; }
  .hero-title { font-size: 32px; }
  .hero-subtitle { font-size: 16px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .hero-trust { gap: 16px; flex-direction: column; }
  .trust-bar-inner { flex-wrap: wrap; }
  .trust-item { flex: 1 1 45%; }
  .trust-item:not(:last-child)::after { display: none; }
  .feature-block { grid-template-columns: 1fr; gap: 24px; }
  .feature-block.reverse .feature-image { order: 1; }
  .feature-block.reverse .feature-content { order: 2; }
  .feature-image img { height: 220px; }
  .steps-grid { grid-template-columns: 1fr; gap: 20px; }
  .cms-list { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-title { font-size: 26px; }
  .cta-actions { flex-direction: column; align-items: stretch; }
  .cta-actions .btn { width: 100%; }
  .cta-security { flex-direction: column; align-items: center; gap: 8px; }
  .mobile-bottom-bar { display: flex; }
  body { padding-bottom: 64px; }
  .fixed-cta { display: none !important; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (min-width: 769px) {
  .mobile-bottom-bar { display: none; }
  body { padding-bottom: 0; }
  .fixed-cta.show { display: flex; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .logo-text { font-size: 18px; }
  .hero-title { font-size: 28px; }
  .hero-badge { font-size: 12px; }
  .section-title { font-size: 22px; padding-left: 12px; }
  .section-title::before { height: 22px; }
  .trust-value { font-size: 24px; }
  .trust-label { font-size: 12px; }
  .step-number { font-size: 32px; }
  .card-thumb { height: 140px; }
  .footer-bottom { gap: 8px; }
}

/* roulang page: article */
:root {
            --primary: #0F6B62;
            --primary-hover: #0B534D;
            --primary-active: #083F3A;
            --accent: #D49A2A;
            --accent-hover: #B88223;
            --accent-active: #9E6F1C;
            --bg: #F7F8F6;
            --dark: #102A2C;
            --dark-deep: #0E2324;
            --card: #FFFFFF;
            --text: #1E2A2A;
            --text-secondary: #5B6B6B;
            --text-weak: #8A9A98;
            --border: #E3E8E6;
            --success: #2A9D6E;
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 6px;
            --shadow-card: 0 1px 3px rgba(15,107,98,0.06), 0 4px 12px rgba(15,107,98,0.04);
            --shadow-card-hover: 0 4px 8px rgba(15,107,98,0.08), 0 12px 24px rgba(15,107,98,0.06);
            --shadow-header: 0 2px 8px rgba(16,42,44,0.06);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color .15s ease-out, background-color .15s ease-out, border-color .15s ease-out, box-shadow .15s ease-out, transform .15s ease-out;
        }

        button {
            font-family: inherit;
            cursor: pointer;
        }

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

        /* ============ Header / Nav ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.98);
            box-shadow: var(--shadow-header);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 24px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: .5px;
            white-space: nowrap;
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .main-nav .nav-list {
            display: flex;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 6px;
        }

        .main-nav .nav-link {
            display: inline-block;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            position: relative;
            border-bottom: 2px solid transparent;
        }

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

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

        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        .nav-login {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .nav-login:hover {
            color: var(--primary);
        }

        .nav-login svg {
            width: 16px;
            height: 16px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 0 24px;
            border-radius: var(--radius-md);
            background: var(--accent);
            color: var(--dark);
            font-size: 15px;
            font-weight: 700;
            border: 1px solid transparent;
            transition: all .15s ease-out;
            text-align: center;
            line-height: 1;
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            background: var(--accent-active);
            transform: translateY(0);
        }

        .btn-primary:focus-visible,
        .nav-toggle:focus-visible,
        .nav-login:focus-visible,
        .main-nav .nav-link:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .btn-primary.btn-sm {
            min-height: 40px;
            padding: 0 18px;
            font-size: 14px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            background: transparent;
            border: none;
            border-radius: var(--radius-sm);
            padding: 10px;
        }

        .nav-toggle span {
            display: block;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: transform .2s ease-out, opacity .2s ease-out;
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            width: 86%;
            max-width: 360px;
            height: 100vh;
            background: var(--dark);
            z-index: 60;
            padding: 32px 28px;
            flex-direction: column;
            gap: 24px;
            box-shadow: -8px 0 24px rgba(16,42,44,0.2);
            transform: translateX(100%);
            transition: transform .25s ease-out;
        }

        .mobile-menu.open {
            transform: translateX(0);
        }

        .mobile-menu .mobile-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 18px;
            font-weight: 700;
        }

        .mobile-menu .mobile-links {
            list-style: none;
            padding: 0;
            margin: 0;
            flex: 1;
        }

        .mobile-menu .mobile-links li+li {
            margin-top: 16px;
        }

        .mobile-menu .mobile-links a {
            color: #C6D4D2;
            font-size: 18px;
            font-weight: 500;
            display: block;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .mobile-menu .mobile-links a:hover {
            color: var(--accent);
        }

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

        .mobile-menu .btn-primary {
            width: 100%;
        }

        .menu-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(16, 42, 44, 0.5);
            z-index: 55;
        }

        .menu-overlay.open {
            display: block;
        }

        /* ============ Breadcrumb ============ */
        .breadcrumb-wrap {
            padding: 20px 0 0;
            background: var(--bg);
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            font-size: 14px;
            color: var(--text-weak);
            gap: 8px;
        }

        .breadcrumb-nav a {
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

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

        .breadcrumb-nav .sep {
            color: #C7D0CE;
            font-weight: 400;
        }

        .breadcrumb-nav .current {
            color: var(--text);
            font-weight: 500;
            max-width: 240px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* ============ Article Hero ============ */
        .article-hero {
            padding: 44px 0 36px;
            background: var(--bg);
        }

        .article-head {
            max-width: 720px;
            margin: 0 auto;
        }

        .category-pill {
            display: inline-block;
            background: rgba(15, 107, 98, 0.08);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 999px;
            margin-bottom: 20px;
            letter-spacing: .3px;
        }

        .article-title {
            font-size: 34px;
            line-height: 1.35;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 20px;
            letter-spacing: .5px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 18px;
            font-size: 14px;
            color: var(--text-secondary);
            padding-top: 20px;
            border-top: 1px solid var(--border);
        }

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

        .meta-item svg {
            width: 16px;
            height: 16px;
            color: var(--text-weak);
        }

        .meta-divider {
            width: 1px;
            height: 14px;
            background: var(--border);
        }

        /* ============ Article Body ============ */
        .article-main {
            padding: 0 0 64px;
        }

        .article-body {
            max-width: 720px;
            margin: 0 auto;
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            padding: 48px 56px;
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
        }

        .article-body h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            margin: 40px 0 18px;
            padding-left: 14px;
            border-left: 4px solid var(--primary);
            line-height: 1.4;
        }

        .article-body h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text);
            margin: 32px 0 14px;
            line-height: 1.5;
        }

        .article-body p {
            margin-bottom: 24px;
            line-height: 1.85;
        }

        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 4px;
            text-decoration-color: rgba(15, 107, 98, 0.3);
        }

        .article-body a:hover {
            color: var(--primary-hover);
            text-decoration-color: var(--primary);
        }

        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(15, 107, 98, 0.04);
            padding: 18px 24px;
            border-radius: 0 8px 8px 0;
            margin: 28px 0;
            color: var(--text-secondary);
            font-size: 15px;
        }

        .article-body ul,
        .article-body ol {
            margin: 0 0 24px;
            padding-left: 4px;
        }

        .article-body ul {
            list-style: none;
        }

        .article-body ul li {
            position: relative;
            padding-left: 22px;
            margin-bottom: 10px;
        }

        .article-body ul li::before {
            content: "·";
            position: absolute;
            left: 6px;
            top: 0;
            color: var(--primary);
            font-weight: 700;
            font-size: 18px;
            line-height: 1.6;
        }

        .article-body ol {
            list-style: decimal;
            padding-left: 24px;
        }

        .article-body ol li {
            margin-bottom: 10px;
        }

        .article-body img {
            border-radius: 8px;
            box-shadow: 0 4px 16px rgba(15, 107, 98, 0.08);
            margin: 28px auto;
        }

        .article-body img+em {
            display: block;
            text-align: center;
            font-size: 13px;
            color: var(--text-weak);
            margin-top: -20px;
            margin-bottom: 24px;
        }

        .article-body pre {
            background: var(--dark);
            color: #C6D4D2;
            padding: 20px 22px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            font-size: 14px;
            line-height: 1.7;
            margin: 28px 0;
        }

        .article-body code {
            font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
            font-size: 14px;
        }

        .article-body hr {
            border: none;
            border-top: 1px solid var(--border);
            margin: 36px 0;
        }

        /* ============ Article Footer (tags / share) ============ */
        .article-footer {
            max-width: 720px;
            margin: 0 auto;
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

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

        .tag {
            display: inline-block;
            background: rgba(15, 107, 98, 0.08);
            color: var(--primary);
            font-size: 13px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: var(--radius-sm);
        }

        .share-group {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .share-label {
            font-size: 14px;
            color: var(--text-secondary);
        }

        .share-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 999px;
            border: 1px solid var(--border);
            background: #fff;
            color: var(--text-secondary);
            font-size: 14px;
            transition: all .15s ease-out;
        }

        .share-btn:hover {
            background: rgba(15, 107, 98, 0.06);
            border-color: var(--primary);
            color: var(--primary);
        }

        .share-btn:active {
            background: rgba(15, 107, 98, 0.12);
        }

        .share-btn:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ============ Not Found ============ */
        .not-found {
            max-width: 720px;
            margin: 0 auto;
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            padding: 64px 40px;
            text-align: center;
        }

        .not-found-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 64px;
            height: 64px;
            border-radius: 50%;
            border: 2px dashed var(--accent);
            color: var(--accent);
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .not-found h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 12px;
        }

        .not-found p {
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 28px;
        }

        /* ============ Related Posts ============ */
        .related-posts {
            padding: 72px 0;
            background: var(--bg);
        }

        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 36px;
            gap: 16px;
            flex-wrap: wrap;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            margin: 0;
            line-height: 1.35;
            position: relative;
            padding-left: 14px;
        }

        .section-title::before {
            content: "";
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 4px;
            border-radius: 4px;
            background: var(--primary);
        }

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

        .related-grid .feature-card {
            grid-column: span 2;
        }

        .related-grid .side-cards {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .rel-card {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: box-shadow .15s ease-out, transform .15s ease-out;
        }

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

        .rel-card.feature-card {
            flex-direction: row;
        }

        .rel-card.feature-card .rel-thumb {
            width: 46%;
            flex-shrink: 0;
        }

        .rel-thumb {
            position: relative;
            overflow: hidden;
            background: #E3E8E6;
            aspect-ratio: 16 / 9;
            flex-shrink: 0;
        }

        .feature-card .rel-thumb {
            aspect-ratio: auto;
            min-height: 240px;
        }

        .rel-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .2s ease-out;
        }

        .rel-card:hover .rel-thumb img {
            transform: scale(1.03);
        }

        .rel-content {
            padding: 20px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .rel-category {
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(15, 107, 98, 0.08);
            display: inline-block;
            padding: 2px 10px;
            border-radius: 999px;
            width: fit-content;
        }

        .rel-title {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.5;
            color: var(--text);
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .rel-card.feature-card .rel-title {
            font-size: 22px;
        }

        .rel-title a:hover {
            color: var(--primary);
        }

        .rel-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .rel-meta {
            margin-top: auto;
            font-size: 13px;
            color: var(--text-weak);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        /* ============ CTA Band ============ */
        .cta-band {
            background: var(--dark);
            padding: 64px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-band::after {
            content: "";
            position: absolute;
            right: -120px;
            top: -120px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(212, 154, 42, 0.12) 0%, transparent 62%);
            pointer-events: none;
        }

        .cta-inner {
            max-width: 680px;
            margin: 0 auto;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .cta-inner h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 16px;
            line-height: 1.4;
        }

        .cta-inner p {
            color: #A8B8B6;
            font-size: 16px;
            margin-bottom: 32px;
            line-height: 1.7;
        }

        .cta-inner .btn-primary {
            min-height: 48px;
            padding: 0 36px;
            font-size: 16px;
        }

        .cta-security {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 18px;
            margin-top: 22px;
            font-size: 13px;
            color: #7A9491;
        }

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

        .cta-security .dot {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--success);
            display: inline-block;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--dark-deep);
            padding: 56px 0 24px;
            color: #C6D4D2;
        }

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

        .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: #7A9491;
            margin-bottom: 18px;
            max-width: 300px;
        }

        .footer-security {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: #8FA8A5;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 999px;
            padding: 6px 14px;
        }

        .footer-security svg {
            width: 15px;
            height: 15px;
            color: var(--success);
        }

        .footer-title {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin: 0 0 18px;
        }

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

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

        .footer-links a {
            color: #7A9491;
            font-size: 14px;
            line-height: 1.6;
        }

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

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

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
            font-size: 14px;
            color: #7A9491;
            line-height: 1.6;
        }

        .footer-contact svg {
            width: 16px;
            height: 16px;
            flex-shrink: 0;
            color: #8FA8A5;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 24px;
            font-size: 13px;
            color: #5E7A76;
        }

        .footer-bottom a {
            color: #7A9491;
        }

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

        /* ============ Mobile Fixed Bar ============ */
        .mobile-cta-bar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 40;
            background: var(--dark);
            box-shadow: 0 -4px 16px rgba(16, 42, 44, 0.08);
            padding: 10px 16px;
            align-items: center;
            gap: 12px;
        }

        .mobile-cta-bar .btn-primary {
            flex: 1;
            min-height: 44px;
        }

        .mobile-cta-text {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            white-space: nowrap;
        }

        /* ============ Responsive ============ */
        @media (min-width: 1280px) {
            .rel-card.feature-card .rel-title {
                font-size: 22px;
            }
        }

        @media (max-width: 1023px) and (min-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 1023px) {
            .main-nav {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .header-actions .btn-primary {
                display: none;
            }
            .nav-login {
                display: none;
            }
        }

        @media (max-width: 767px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .article-hero {
                padding: 32px 0 24px;
            }

            .article-title {
                font-size: 24px;
                line-height: 1.4;
            }

            .article-meta {
                gap: 12px;
                font-size: 13px;
            }

            .meta-divider {
                display: none;
            }

            .article-body {
                padding: 28px 20px;
                border-radius: var(--radius-md);
            }

            .article-body h2 {
                font-size: 22px;
                padding-left: 10px;
            }

            .article-body h3 {
                font-size: 18px;
            }

            .article-footer {
                flex-direction: column;
                align-items: flex-start;
                gap: 14px;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .related-grid .feature-card {
                grid-column: span 1;
            }

            .rel-card.feature-card {
                flex-direction: column;
            }

            .rel-card.feature-card .rel-thumb {
                width: 100%;
                aspect-ratio: 16 / 9;
                min-height: auto;
            }

            .rel-card.feature-card .rel-title {
                font-size: 18px;
            }

            .cta-band {
                padding: 48px 0;
            }

            .cta-inner h2 {
                font-size: 22px;
            }

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

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

            .mobile-cta-bar {
                display: flex;
            }

            body {
                padding-bottom: 64px;
            }
        }

        @media (min-width: 768px) and (max-width: 1024px) {
            .related-grid {
                grid-template-columns: 1fr 1fr;
            }

            .related-grid .feature-card {
                grid-column: span 2;
            }

            .related-grid .side-cards {
                grid-column: span 2;
                flex-direction: row;
            }

            .related-grid .side-cards .rel-card {
                flex: 1;
            }
        }

/* roulang page: category1 */
:root {
    --teal-600: #0F6B62;
    --teal-700: #0B534D;
    --teal-800: #083F3A;
    --amber-500: #D49A2A;
    --amber-600: #B88223;
    --amber-700: #9E6F1C;
    --bg-main: #F7F8F6;
    --bg-dark: #102A2C;
    --bg-darker: #0E2324;
    --card-bg: #FFFFFF;
    --text-main: #1E2A2A;
    --text-sub: #5B6B6B;
    --text-weak: #8A9A98;
    --border: #E3E8E6;
    --success: #2A9D6E;
    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 6px;
    --shadow-card: 0 1px 3px rgba(15, 107, 98, 0.06), 0 4px 12px rgba(15, 107, 98, 0.04);
    --shadow-card-hover: 0 4px 8px rgba(15, 107, 98, 0.08), 0 12px 24px rgba(15, 107, 98, 0.06);
    --transition: 150ms ease-out;
    --font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: var(--font-family);
    background: var(--bg-main);
    color: var(--text-main);
    font-size: 16px;
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
  }

  a {
    color: var(--teal-600);
    text-decoration: none;
    transition: color var(--transition);
  }

  a:hover {
    color: var(--teal-700);
  }

  a:focus-visible,
  button:focus-visible,
  input:focus-visible,
  select:focus-visible {
    outline: 2px solid var(--amber-500);
    outline-offset: 2px;
  }

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

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

  .section {
    padding: 80px 0;
  }

  @media (max-width: 767px) {
    .section {
      padding: 48px 0;
    }
    .container {
      padding-left: 16px;
      padding-right: 16px;
    }
  }

  /* ---- Header & Nav ---- */
  .site-header {
    background: rgba(255, 255, 255, 0.98);
    height: 72px;
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid var(--border);
    transition: box-shadow 0.2s ease;
  }

  .site-header.scrolled {
    box-shadow: 0 2px 8px rgba(16, 42, 44, 0.06);
  }

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

  .site-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }

  .logo-icon {
    width: 36px;
    height: 36px;
    background: var(--teal-600);
    color: #fff;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    flex-shrink: 0;
  }

  .logo-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: 0.02em;
    white-space: nowrap;
  }

  .main-nav {
    flex: 1;
    display: flex;
    justify-content: center;
  }

  .nav-list {
    display: flex;
    list-style: none;
    gap: 8px;
  }

  .nav-link {
    display: inline-block;
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-sub);
    border-radius: 6px;
    position: relative;
    transition: color var(--transition);
    white-space: nowrap;
  }

  .nav-link::after {
    content: "";
    position: absolute;
    left: 16px;
    right: 16px;
    bottom: 0;
    height: 2px;
    background: var(--teal-600);
    border-radius: 2px;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.2s ease;
  }

  .nav-link:hover {
    color: var(--teal-600);
  }

  .nav-link:hover::after,
  .nav-link.active::after {
    transform: scaleX(1);
  }

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

  .header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
  }

  .nav-login-link {
    font-size: 14px;
    color: var(--text-sub);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
  }

  .nav-login-link:hover {
    color: var(--teal-600);
  }

  .nav-login-link svg {
    width: 16px;
    height: 16px;
  }

  .nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    background: #fff;
    border-radius: 10px;
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
  }

  .nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--text-main);
    border-radius: 2px;
    transition: all 0.25s ease;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* Mobile Drawer */
  .mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 320px;
    max-width: 85vw;
    background: var(--bg-dark);
    z-index: 100;
    padding: 28px 24px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
  }

  .mobile-drawer.open {
    transform: translateX(0);
  }

  .drawer-title {
    color: #C6D4D2;
    font-size: 14px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .drawer-close {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.08);
    border: none;
    border-radius: 8px;
    color: #C6D4D2;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .drawer-close:hover {
    background: rgba(255, 255, 255, 0.14);
  }

  .drawer-link {
    display: block;
    padding: 16px 0;
    font-size: 18px;
    color: #F0F5F4;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    font-weight: 500;
  }

  .drawer-link:hover {
    color: var(--amber-500);
  }

  .drawer-link.active {
    color: var(--amber-500);
  }

  .drawer-cta {
    margin-top: 28px;
  }

  .drawer-overlay {
    position: fixed;
    inset: 0;
    background: rgba(16, 42, 44, 0.5);
    z-index: 99;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
  }

  .drawer-overlay.open {
    opacity: 1;
    visibility: visible;
  }

  /* ---- Buttons ---- */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 24px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    border: none;
    gap: 8px;
    transition: all var(--transition);
    white-space: nowrap;
  }

  .btn:active {
    transform: translateY(0);
  }

  .btn-primary {
    background: var(--amber-500);
    color: var(--bg-dark);
  }

  .btn-primary:hover {
    background: var(--amber-600);
    color: var(--bg-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(212, 154, 42, 0.3);
  }

  .btn-primary:active {
    background: var(--amber-700);
    transform: translateY(0);
  }

  .btn-outline {
    border: 1px solid var(--teal-600);
    color: var(--teal-600);
    background: transparent;
  }

  .btn-outline:hover {
    background: rgba(15, 107, 98, 0.06);
    color: var(--teal-700);
    transform: translateY(-1px);
  }

  .btn-outline:active {
    background: rgba(15, 107, 98, 0.12);
    transform: translateY(0);
  }

  .btn-white-outline {
    border: 1px solid rgba(255, 255, 255, 0.65);
    color: #fff;
    background: transparent;
  }

  .btn-white-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border-color: #fff;
  }

  .btn-lg {
    min-height: 52px;
    padding: 0 32px;
    font-size: 16px;
  }

  .btn-sm {
    min-height: 40px;
    padding: 0 20px;
    font-size: 14px;
  }

  .btn-block {
    width: 100%;
  }

  /* ---- Hero ---- */
  .category-hero {
    background: var(--bg-dark);
    background-image: linear-gradient(rgba(16, 42, 44, 0.9), rgba(16, 42, 44, 0.94)), url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    color: #fff;
    padding: 80px 0 72px;
    position: relative;
    overflow: hidden;
  }

  .category-hero::after {
    content: "";
    position: absolute;
    right: -120px;
    top: -120px;
    width: 360px;
    height: 360px;
    border-radius: 50%;
    background: rgba(15, 107, 98, 0.18);
    pointer-events: none;
  }

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

  .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: #8FA8A5;
    margin-bottom: 28px;
    flex-wrap: wrap;
  }

  .breadcrumb a {
    color: #8FA8A5;
  }

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

  .breadcrumb .sep {
    color: rgba(255, 255, 255, 0.3);
  }

  .breadcrumb .current {
    color: var(--amber-500);
  }

  .category-hero h1 {
    font-size: 42px;
    font-weight: 700;
    line-height: 1.35;
    color: #fff;
    margin-bottom: 16px;
  }

  .category-hero .lead {
    font-size: 18px;
    color: #A8B8B6;
    max-width: 640px;
    margin-bottom: 32px;
    line-height: 1.8;
  }

  .hero-ctas {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 40px;
  }

  .hero-trust {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
  }

  .hero-trust-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: #8FA8A5;
  }

  .hero-trust-item svg {
    width: 16px;
    height: 16px;
    color: var(--success);
  }

  @media (max-width: 767px) {
    .category-hero {
      padding: 56px 0 48px;
    }
    .category-hero h1 {
      font-size: 32px;
    }
    .category-hero .lead {
      font-size: 16px;
    }
    .hero-trust {
      gap: 16px;
    }
  }

  /* ---- Category Description ---- */
  .category-desc {
    padding: 56px 0 0;
  }

  .category-desc-inner {
    max-width: 800px;
    margin: 0 auto;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px 48px;
    box-shadow: var(--shadow-card);
    position: relative;
  }

  .category-desc-inner::before {
    content: "";
    position: absolute;
    left: 0;
    top: 32px;
    bottom: 32px;
    width: 4px;
    background: var(--teal-600);
    border-radius: 0 4px 4px 0;
  }

  .category-desc-inner p {
    font-size: 16px;
    color: var(--text-sub);
    line-height: 1.9;
  }

  .category-desc-inner strong {
    color: var(--teal-600);
  }

  @media (max-width: 767px) {
    .category-desc-inner {
      padding: 28px 24px;
    }
  }

  /* ---- Topic Tabs ---- */
  .topic-tabs {
    padding: 40px 0 0;
  }

  .topic-tabs-inner {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .topic-tab {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid var(--border);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-sub);
    transition: all var(--transition);
  }

  .topic-tab:hover {
    border-color: var(--teal-600);
    color: var(--teal-600);
    box-shadow: 0 2px 8px rgba(15, 107, 98, 0.08);
  }

  .topic-tab svg {
    width: 14px;
    height: 14px;
    color: var(--amber-500);
  }

  /* ---- Vertical Content Blocks ---- */
  .guide-blocks {
    padding: 64px 0 16px;
  }

  .guide-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    margin-bottom: 80px;
  }

  .guide-block.reverse .guide-media {
    order: 2;
  }

  .guide-block.reverse .guide-content {
    order: 1;
  }

  .guide-media {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    position: relative;
  }

  .guide-media img {
    width: 100%;
    height: 320px;
    object-fit: cover;
    transition: transform 0.4s ease;
  }

  .guide-media:hover img {
    transform: scale(1.02);
  }

  .guide-media::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    border: 1px solid rgba(15, 107, 98, 0.08);
    pointer-events: none;
  }

  .guide-content {
    padding: 8px 0;
  }

  .guide-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--teal-600);
    background: rgba(15, 107, 98, 0.08);
    border-radius: var(--radius-sm);
    padding: 4px 12px;
    margin-bottom: 16px;
    letter-spacing: 0.04em;
  }

  .guide-label svg {
    width: 14px;
    height: 14px;
  }

  .guide-content h2 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.4;
    margin-bottom: 16px;
  }

  .guide-content p {
    font-size: 16px;
    color: var(--text-sub);
    line-height: 1.85;
    margin-bottom: 16px;
  }

  .guide-list {
    list-style: none;
    margin-top: 12px;
  }

  .guide-list li {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 8px 0;
    font-size: 15px;
    color: var(--text-sub);
    line-height: 1.7;
  }

  .guide-list li::before {
    content: "";
    flex-shrink: 0;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--amber-500);
    margin-top: 12px;
  }

  .link-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--teal-600);
    margin-top: 8px;
  }

  .link-more:hover {
    color: var(--teal-700);
  }

  .link-more svg {
    width: 16px;
    height: 16px;
    transition: transform 0.2s ease;
  }

  .link-more:hover svg {
    transform: translateX(4px);
  }

  @media (max-width: 767px) {
    .guide-block,
    .guide-block.reverse {
      grid-template-columns: 1fr;
      gap: 24px;
      margin-bottom: 56px;
    }
    .guide-block.reverse .guide-media {
      order: 1;
    }
    .guide-block.reverse .guide-content {
      order: 2;
    }
    .guide-media img {
      height: 220px;
    }
    .guide-content h2 {
      font-size: 22px;
    }
  }

  /* ---- Stats Bar ---- */
  .stats-band {
    background: var(--bg-dark);
    border-radius: var(--radius-lg);
    padding: 40px 48px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    position: relative;
    overflow: hidden;
  }

  .stats-band::before {
    content: "";
    position: absolute;
    right: -80px;
    top: -80px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(15, 107, 98, 0.2);
  }

  .stat-item {
    text-align: center;
    padding: 8px 24px;
    position: relative;
    z-index: 2;
  }

  .stat-item + .stat-item {
    border-left: 1px solid rgba(255, 255, 255, 0.1);
  }

  .stat-number {
    font-size: 32px;
    font-weight: 700;
    color: #fff;
    font-feature-settings: "tnum";
    margin-bottom: 4px;
  }

  .stat-number span {
    color: var(--amber-500);
  }

  .stat-label {
    font-size: 14px;
    color: #8FA8A5;
  }

  @media (max-width: 767px) {
    .stats-band {
      grid-template-columns: 1fr;
      gap: 8px;
      padding: 32px 24px;
    }
    .stat-item + .stat-item {
      border-left: none;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 20px;
    }
  }

  /* ---- FAQ ---- */
  .faq-section {
    padding-top: 16px;
  }

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

  .section-header .section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--teal-600);
    background: rgba(15, 107, 98, 0.08);
    border-radius: 999px;
    padding: 6px 16px;
    margin-bottom: 16px;
  }

  .section-header h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.35;
  }

  .section-header p {
    font-size: 16px;
    color: var(--text-sub);
    margin-top: 12px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }

  .faq-wrap {
    max-width: 860px;
    margin: 0 auto;
  }

  .faq-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    overflow: hidden;
    transition: box-shadow var(--transition);
  }

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

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

  .faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
    text-align: left;
    font-family: inherit;
    transition: background var(--transition);
  }

  .faq-question:hover {
    background: rgba(15, 107, 98, 0.02);
  }

  .faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(15, 107, 98, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.3s ease;
  }

  .faq-icon svg {
    width: 14px;
    height: 14px;
    color: var(--teal-600);
    transition: transform 0.3s ease;
  }

  .faq-item.open .faq-icon {
    background: var(--teal-600);
  }

  .faq-item.open .faq-icon svg {
    transform: rotate(45deg);
    color: #fff;
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .faq-answer-inner {
    padding: 0 24px 20px;
    border-left: 3px solid var(--teal-600);
    margin-left: 24px;
    margin-right: 24px;
    margin-bottom: 16px;
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-sub);
  }

  @media (max-width: 767px) {
    .section-header h2 {
      font-size: 26px;
    }
    .faq-question {
      padding: 16px 16px;
      font-size: 14px;
    }
  }

  /* ---- CTA Band ---- */
  .cta-band {
    background: var(--bg-dark);
    background-image: radial-gradient(circle at 85% 30%, rgba(15, 107, 98, 0.25) 0%, transparent 50%);
    padding: 64px 0;
    text-align: center;
  }

  .cta-band h2 {
    font-size: 28px;
    color: #fff;
    margin-bottom: 12px;
  }

  .cta-band p {
    color: #A8B8B6;
    font-size: 16px;
    margin-bottom: 32px;
  }

  .cta-band .btn {
    margin-bottom: 24px;
  }

  .cta-safe {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
    font-size: 14px;
    color: #7A9491;
  }

  .cta-safe span {
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .cta-safe svg {
    width: 14px;
    height: 14px;
    color: var(--success);
  }

  @media (max-width: 767px) {
    .cta-band {
      padding: 48px 16px;
    }
    .cta-band h2 {
      font-size: 24px;
    }
  }

  /* ---- Footer ---- */
  .site-footer {
    background: var(--bg-darker);
    color: #C6D4D2;
    padding: 56px 0 0;
    font-size: 14px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 0.8fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
  }

  .footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
  }

  .footer-desc {
    font-size: 14px;
    line-height: 1.8;
    color: #8FA8A5;
    margin-bottom: 20px;
    max-width: 280px;
  }

  .footer-security {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: #7A9491;
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 6px 12px;
    border-radius: 6px;
  }

  .footer-security svg {
    width: 16px;
    height: 16px;
    color: var(--success);
  }

  .footer-title {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
  }

  .footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .footer-links a {
    color: #8FA8A5;
    font-size: 14px;
    transition: color var(--transition);
  }

  .footer-links a:hover {
    color: var(--amber-500);
  }

  .footer-contact {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: #8FA8A5;
  }

  .footer-contact svg {
    width: 18px;
    height: 18px;
    color: var(--teal-600);
    flex-shrink: 0;
  }

  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 13px;
    color: #7A9491;
  }

  @media (max-width: 1023px) {
    .footer-grid {
      grid-template-columns: 1fr 1fr;
    }
  }

  @media (max-width: 767px) {
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 32px;
    }
    .footer-bottom {
      flex-direction: column;
      text-align: center;
    }
  }

  /* ---- Mobile Bottom Bar ---- */
  .mobile-bottom-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-dark);
    padding: 10px 16px;
    box-shadow: 0 -4px 16px rgba(16, 42, 44, 0.08);
    z-index: 60;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }

  .mobile-bottom-bar .btn {
    min-height: 44px;
  }

  @media (max-width: 767px) {
    .mobile-bottom-bar {
      display: block;
    }
    body {
      padding-bottom: 64px;
    }
    .site-header.scrolled .header-inner .nav-login-link {
      display: none;
    }
  }

  @media (max-width: 1023px) {
    .main-nav {
      display: none;
    }
    .nav-toggle {
      display: flex;
    }
    .header-actions .btn-sm {
      display: none;
    }
  }

  @media (min-width: 1024px) {
    .header-actions .nav-toggle {
      display: none;
    }
  }

  /* ---- Extra ---- */
  .text-teal {
    color: var(--teal-600);
  }

  .bg-teal-soft {
    background: rgba(15, 107, 98, 0.08);
  }

  .safe-link {
    color: var(--teal-600);
    text-decoration: underline;
    text-underline-offset: 4px;
    text-decoration-color: rgba(15, 107, 98, 0.3);
  }

  .safe-link:hover {
    color: var(--teal-700);
    text-decoration-color: var(--teal-600);
  }

/* roulang page: category2 */
:root {
            --primary: #0F6B62;
            --primary-hover: #0B534D;
            --primary-active: #083F3A;
            --accent: #D49A2A;
            --accent-hover: #B88223;
            --accent-active: #9E6F1C;
            --bg-main: #F7F8F6;
            --bg-deep: #102A2C;
            --bg-deeper: #0E2324;
            --text-main: #1E2A2A;
            --text-sub: #5B6B6B;
            --text-faint: #8A9A98;
            --border-color: #E3E8E6;
            --success: #2A9D6E;
            --radius-card: 10px;
            --radius-panel: 16px;
            --shadow-card: 0 1px 3px rgba(15,107,98,0.06), 0 4px 12px rgba(15,107,98,0.04);
            --shadow-card-hover: 0 4px 8px rgba(15,107,98,0.08), 0 12px 24px rgba(15,107,98,0.06);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-main);
            background-color: var(--bg-main);
            -webkit-font-smoothing: antialiased;
        }

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

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

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

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

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

        .container-narrow {
            max-width: 920px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.98);
            border-bottom: 1px solid var(--border-color);
            height: 72px;
            transition: box-shadow 0.2s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 2px 8px rgba(16, 42, 44, 0.06);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            white-space: nowrap;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .main-nav .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
        }

        .main-nav .nav-link {
            display: inline-block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-sub);
            border-bottom: 2px solid transparent;
            transition: color 0.15s ease-out, border-color 0.15s ease-out;
            position: relative;
        }

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

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-link-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-sub);
            padding: 6px 8px;
            transition: color 0.15s ease;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 0 24px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 700;
            transition: all 0.15s ease-out;
            border: 1px solid transparent;
            line-height: 1.2;
            white-space: nowrap;
        }

        .btn:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--bg-deep);
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            background: var(--accent-active);
            transform: translateY(0);
        }

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

        .btn-outline:hover {
            background: rgba(15, 107, 98, 0.06);
        }

        .btn-outline:active {
            background: rgba(15, 107, 98, 0.1);
        }

        .btn-light {
            border-color: rgba(255, 255, 255, 0.65);
            color: #fff;
            background: transparent;
        }

        .btn-light:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.85);
        }

        .btn-small {
            min-height: 40px;
            padding: 0 18px;
            font-size: 14px;
        }

        .btn-block {
            width: 100%;
        }

        .hamburger {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            transition: background 0.2s ease;
        }

        .hamburger:hover {
            background: rgba(15, 107, 98, 0.06);
        }

        .hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            border-radius: 2px;
            background: var(--text-main);
            transition: transform 0.2s ease, opacity 0.2s ease;
        }

        .hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Mobile drawer */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            width: 300px;
            height: 100vh;
            background: var(--bg-deep);
            z-index: 200;
            padding: 80px 32px 32px;
            flex-direction: column;
            gap: 8px;
            box-shadow: -8px 0 24px rgba(16, 42, 44, 0.16);
            transform: translateX(100%);
            transition: transform 0.25s ease;
        }

        .mobile-menu.open {
            transform: translateX(0);
        }

        .mobile-menu .nav-link {
            color: #c6d4d2;
            font-size: 18px;
            padding: 12px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            display: block;
        }

        .mobile-menu .nav-link.active {
            color: var(--accent);
        }

        .mobile-menu .btn {
            margin-top: 24px;
        }

        .mobile-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(14, 35, 36, 0.5);
            z-index: 150;
            opacity: 0;
            transition: opacity 0.25s ease;
        }

        .mobile-overlay.open {
            opacity: 1;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-wrap {
            background: #fff;
            border-bottom: 1px solid var(--border-color);
            padding: 14px 0;
        }

        .breadcrumb-list {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            font-size: 14px;
            color: var(--text-faint);
            flex-wrap: wrap;
        }

        .breadcrumb-list a {
            color: var(--text-sub);
            transition: color 0.15s ease;
        }

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

        .breadcrumb-list li+li::before {
            content: "/";
            margin-right: 6px;
            color: var(--border-color);
        }

        .breadcrumb-list li:last-child {
            color: var(--primary);
            font-weight: 500;
        }

        /* ===== Hero ===== */
        .category-hero {
            background-color: var(--bg-deep);
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                radial-gradient(circle at 85% 30%, rgba(15, 107, 98, 0.35) 0%, transparent 50%);
            background-size: 40px 40px, 40px 40px, 100% 100%;
            padding: 88px 0;
            position: relative;
            overflow: hidden;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            right: -80px;
            top: 50%;
            transform: translateY(-50%);
            width: 360px;
            height: 360px;
            border: 1px solid rgba(212, 154, 42, 0.15);
            border-radius: 50%;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            right: 20px;
            top: 50%;
            transform: translateY(-50%);
            width: 220px;
            height: 220px;
            border: 1px solid rgba(212, 154, 42, 0.1);
            border-radius: 50%;
        }

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

        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 999px;
            padding: 6px 16px;
            font-size: 13px;
            color: #A8B8B6;
            margin-bottom: 24px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .category-hero .hero-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--success);
            display: inline-block;
        }

        .category-hero h1 {
            font-size: 42px;
            line-height: 1.3;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            max-width: 640px;
        }

        .category-hero .hero-sub {
            font-size: 17px;
            line-height: 1.8;
            color: #A8B8B6;
            max-width: 640px;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }

        .hero-trust {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            color: #8FA8A5;
            font-size: 14px;
        }

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

        .hero-trust span::before {
            content: "↳";
            color: var(--accent);
            font-weight: 700;
        }

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

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

        .section-tight {
            padding: 40px 0;
        }

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

        .section-white {
            background: #fff;
        }

        .section-header {
            margin-bottom: 48px;
        }

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

        .section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .section-eyebrow::before {
            content: '';
            width: 4px;
            height: 18px;
            border-radius: 2px;
            background: var(--primary);
            display: inline-block;
        }

        .section-header.center .section-eyebrow::before {
            display: none;
        }

        .section-title {
            font-size: 32px;
            line-height: 1.35;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-sub);
            max-width: 720px;
            line-height: 1.8;
        }

        .section-desc.center-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Cards ===== */
        .card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px;
            transition: box-shadow 0.15s ease-out, transform 0.15s ease-out;
        }

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

        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(15, 107, 98, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            color: var(--primary);
        }

        .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .card-desc {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.8;
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            margin-top: 12px;
            transition: color 0.15s ease;
        }

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

        .card-link::after {
            content: "→";
            transition: transform 0.15s ease;
        }

        .card-link:hover::after {
            transform: translateX(3px);
        }

        /* ===== Feature blocks ===== */
        .feature-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .feature-block.reverse .feature-visual {
            order: 2;
        }

        .feature-visual {
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-card-hover);
            position: relative;
        }

        .feature-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 320px;
        }

        .feature-content .feature-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(15, 107, 98, 0.08);
            padding: 4px 12px;
            border-radius: 6px;
            margin-bottom: 16px;
        }

        .feature-content h3 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.4;
            margin-bottom: 14px;
        }

        .feature-content p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .feature-list {
            list-style: none;
            margin-bottom: 20px;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 15px;
            color: var(--text-sub);
            padding: 6px 0;
            line-height: 1.6;
        }

        .feature-list li::before {
            content: "✓";
            color: var(--success);
            font-weight: 700;
            flex-shrink: 0;
            margin-top: 2px;
        }

        /* ===== Stats / data band ===== */
        .stats-band {
            background: #fff;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            padding: 40px 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-item {
            text-align: center;
            padding: 16px 8px;
            position: relative;
        }

        .stat-item+.stat-item::before {
            content: '';
            position: absolute;
            left: -12px;
            top: 50%;
            transform: translateY(-50%);
            width: 1px;
            height: 48px;
            background: var(--border-color);
        }

        .stat-number {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            font-feature-settings: "tnum";
            line-height: 1.3;
            margin-bottom: 4px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-sub);
        }

        /* ===== Scenarios / steps ===== */
        .scenario-wrap {
            background: #fff;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            padding: 32px;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }

        .scenario-visual {
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            min-height: 360px;
            background: var(--bg-mist);
            position: relative;
        }

        .scenario-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .steps-list {
            list-style: none;
        }

        .steps-list li {
            display: flex;
            gap: 16px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border-color);
            align-items: flex-start;
        }

        .steps-list li:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .steps-list li:first-child {
            padding-top: 0;
        }

        .step-num {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(15, 107, 98, 0.08);
            color: var(--primary);
            font-weight: 700;
            font-size: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            border: 1px solid rgba(15, 107, 98, 0.15);
        }

        .step-content h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 4px;
            line-height: 1.4;
        }

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

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
            background: #fff;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-color);
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            transition: background 0.15s ease;
        }

        .faq-question:hover {
            background: rgba(15, 107, 98, 0.02);
        }

        .faq-question h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.5;
            flex: 1;
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1.5px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            position: relative;
            transition: transform 0.2s ease, background 0.2s ease;
        }

        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            background: var(--primary);
            border-radius: 1px;
            transition: transform 0.2s ease;
        }

        .faq-icon::before {
            width: 10px;
            height: 2px;
        }

        .faq-icon::after {
            width: 2px;
            height: 10px;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: rgba(15, 107, 98, 0.08);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.25s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 20px 28px;
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.8;
            border-left: 3px solid var(--primary);
            margin-left: 24px;
            margin-bottom: 20px;
        }

        /* ===== CTA band ===== */
        .cta-band {
            background: var(--bg-deep);
            padding: 64px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-band::after {
            content: '';
            position: absolute;
            right: -60px;
            top: 50%;
            transform: translateY(-50%);
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(15, 107, 98, 0.25) 0%, transparent 70%);
            border-radius: 50%;
        }

        .cta-band .container {
            position: relative;
            z-index: 2;
        }

        .cta-band h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            text-align: center;
        }

        .cta-band .cta-sub {
            font-size: 16px;
            color: #A8B8B6;
            text-align: center;
            max-width: 640px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }

        .cta-band .cta-safe {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 14px;
            color: #7A9491;
        }

        .cta-band .cta-safe span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .cta-band .cta-safe span::before {
            content: "●";
            font-size: 6px;
            color: var(--accent);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deeper);
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-desc {
            font-size: 14px;
            color: #7A9491;
            line-height: 1.8;
            margin-bottom: 16px;
            max-width: 300px;
        }

        .footer-security {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: #c6d4d2;
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 6px 12px;
            border-radius: 6px;
        }

        .footer-security svg {
            width: 16px;
            height: 16px;
            color: var(--success);
        }

        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            padding-bottom: 8px;
            position: relative;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 24px;
            height: 2px;
            background: var(--accent);
            border-radius: 1px;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 8px;
        }

        .footer-links a {
            font-size: 14px;
            color: #7A9491;
            transition: color 0.15s ease;
            line-height: 1.6;
        }

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

        .footer-contact {
            list-style: none;
        }

        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            font-size: 14px;
            color: #7A9491;
            margin-bottom: 10px;
            line-height: 1.6;
        }

        .footer-contact svg {
            width: 16px;
            height: 16px;
            flex-shrink: 0;
            margin-top: 4px;
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 13px;
            color: #7A9491;
        }

        .footer-bottom .brand-name {
            color: #c6d4d2;
        }

        /* ===== Mobile fixed bar ===== */
        .mobile-cta-bar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 64px;
            background: var(--bg-deep);
            box-shadow: 0 -4px 16px rgba(16, 42, 44, 0.08);
            z-index: 90;
            padding: 10px 16px;
            align-items: center;
            gap: 12px;
        }

        .mobile-cta-bar .btn {
            flex: 1;
        }

        body.has-mobile-bar {
            padding-bottom: 64px;
        }

        /* ===== Timeline / process ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: process;
        }

        .process-step {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-panel);
            padding: 32px 24px;
            position: relative;
            text-align: center;
            transition: box-shadow 0.15s ease, transform 0.15s ease;
        }

        .process-step:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .process-step .process-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(15, 107, 98, 0.08);
            color: var(--primary);
            font-size: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            border: 1px dashed rgba(15, 107, 98, 0.3);
        }

        .process-step h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
        }

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

        /* ===== Split layout for category2 ===== */
        .cat-layout {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 56px;
            align-items: start;
        }

        .cat-main {
            min-width: 0;
        }

        .cat-sidebar {
            position: sticky;
            top: 96px;
        }

        .side-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-panel);
            padding: 28px;
            margin-bottom: 24px;
        }

        .side-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border-color);
            position: relative;
        }

        .side-card h3::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -1px;
            width: 28px;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }

        .side-links {
            list-style: none;
        }

        .side-links li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .side-links li:last-child {
            border-bottom: none;
        }

        .side-links a {
            font-size: 14px;
            color: var(--text-sub);
            transition: color 0.15s ease, padding-left 0.15s ease;
            display: block;
        }

        .side-links a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .side-safe {
            background: var(--bg-deep);
            border-radius: var(--radius-panel);
            padding: 24px;
            color: #fff;
        }

        .side-safe h3 {
            color: #fff;
            border-bottom-color: rgba(255, 255, 255, 0.1);
            margin-bottom: 14px;
        }

        .side-safe p {
            font-size: 14px;
            color: #A8B8B6;
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .side-safe .btn {
            width: 100%;
        }

        .safe-icon-ring {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 64px;
            height: 64px;
            border-radius: 50%;
            border: 2px dashed rgba(212, 154, 42, 0.5);
            margin: 0 auto 16px;
        }

        .safe-icon-ring svg {
            width: 28px;
            height: 28px;
            color: var(--accent);
        }

        /* ===== Text block ===== */
        .text-block {
            margin-bottom: 40px;
        }

        .text-block h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            padding-left: 12px;
            border-left: 4px solid var(--primary);
            line-height: 1.4;
        }

        .text-block p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.85;
            margin-bottom: 16px;
        }

        .text-block ul {
            padding-left: 0;
            list-style: none;
            margin-bottom: 16px;
        }

        .text-block ul li {
            font-size: 15px;
            color: var(--text-sub);
            padding: 6px 0;
            display: flex;
            gap: 10px;
            line-height: 1.7;
        }

        .text-block ul li::before {
            content: "·";
            color: var(--primary);
            font-weight: 700;
            font-size: 20px;
            line-height: 1;
        }

        /* ===== Tag chips ===== */
        .tag-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
            background: rgba(15, 107, 98, 0.08);
            padding: 4px 12px;
            border-radius: 6px;
            transition: background 0.15s ease, color 0.15s ease;
        }

        .tag-chip:hover {
            background: rgba(15, 107, 98, 0.12);
            color: var(--primary-hover);
        }

        /* ===== Security benefits ===== */
        .benefit-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            padding: 28px;
            transition: box-shadow 0.15s ease, transform 0.15s ease;
        }

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

        .benefit-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(15, 107, 98, 0.1) 0%, rgba(15, 107, 98, 0.04) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            color: var(--primary);
        }

        .benefit-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .benefit-card p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.8;
        }

        /* ===== Cover image ratio ===== */
        .img-ratio-16x9 {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            border-radius: 8px;
            background: var(--border-color);
        }

        .img-ratio-16x9 img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .img-ratio-4x3 {
            aspect-ratio: 4 / 3;
            overflow: hidden;
            border-radius: 8px;
            background: var(--border-color);
        }

        .img-ratio-4x3 img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ===== Error / placeholder ===== */
        .img-placeholder {
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--border-color);
            color: var(--text-faint);
            font-size: 14px;
        }

        /* ===== Responsive ===== */
        @media (min-width: 1024px) {
            .desktop-hidden {
                display: none !important;
            }
        }

        @media (max-width: 1023px) {
            .main-nav,
            .nav-actions .nav-link-text,
            .nav-actions .btn {
                display: none;
            }

            .hamburger {
                display: flex;
            }

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

            .section-title {
                font-size: 28px;
            }

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

            .cat-layout {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .cat-sidebar {
                position: static;
            }

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

            .feature-block.reverse .feature-visual {
                order: 0;
            }

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

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

            .stat-item:nth-child(2)::before {
                display: none;
            }

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

        @media (min-width: 768px) {
            .mobile-menu {
                display: none !important;
            }
        }

        @media (max-width: 767px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .container-narrow {
                padding-left: 16px;
                padding-right: 16px;
            }

            .site-header {
                height: 60px;
            }

            .header-inner {
                height: 60px;
            }

            .logo {
                font-size: 17px;
            }

            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 16px;
                border-radius: 8px;
            }

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

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

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

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

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

            .hero-trust {
                flex-direction: column;
                gap: 8px;
            }

            .section {
                padding: 48px 0;
            }

            .section-sm {
                padding: 40px 0;
            }

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

            .section-title {
                font-size: 24px;
            }

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

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

            .stat-number {
                font-size: 26px;
            }

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

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

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

            .mobile-cta-bar {
                display: flex;
            }

            body {
                padding-bottom: 0;
            }

            body.has-mobile-bar {
                padding-bottom: 64px;
            }

            .text-block h2 {
                font-size: 22px;
            }

            .scenario-wrap {
                padding: 20px;
            }

            .steps-list li {
                padding: 16px 0;
            }

            .faq-question {
                padding: 16px;
            }

            .faq-answer-inner {
                padding-right: 16px;
                padding-left: 20px;
                margin-left: 16px;
            }

            .cta-band {
                padding: 48px 0;
            }

            .cta-band h2 {
                font-size: 22px;
            }

            .cta-band .cta-safe {
                flex-direction: column;
                align-items: center;
                gap: 8px;
            }

            .mobile-menu {
                display: flex;
            }

            .benefit-card {
                padding: 20px;
            }
        }

        @media (max-width: 520px) {
            .logo {
                font-size: 15px;
                gap: 6px;
            }

            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 14px;
            }

            .category-hero h1 {
                font-size: 26px;
            }

            .category-hero .hero-sub {
                font-size: 14px;
            }

            .hero-trust span {
                font-size: 13px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }

            .stat-item {
                padding: 12px 4px;
            }

            .stat-number {
                font-size: 22px;
            }

            .stat-label {
                font-size: 12px;
            }

            .process-step {
                padding: 24px 16px;
            }

            .card {
                padding: 20px;
            }
        }