/* roulang page: index */
:root {
  --primary: #0E7C7B;
  --primary-dark: #0B6867;
  --primary-tint: rgba(14, 124, 123, 0.06);
  --accent: #F2A93B;
  --accent-dark: #E09224;
  --accent-tint: rgba(242, 169, 59, 0.12);
  --bg: #F7F5F0;
  --text-main: #1F2937;
  --text-sub: #6B7280;
  --border: #E5E7EB;
  --success: #16A34A;
  --error: #DC2626;
  --info: #F59E0B;
  --white: #FFFFFF;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 24px rgba(14,124,123,0.12);
  --sidebar-w: 260px;
  --content-max: 1200px;
  --font-stack: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-main);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--primary-dark); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; box-shadow: 0 0 0 3px rgba(242,169,59,0.2); }
img { max-width: 100%; height: auto; object-fit: cover; }
button { font-family: var(--font-stack); cursor: pointer; border: none; transition: all .2s ease; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.4; color: var(--text-main); }
ul, ol { list-style: none; }

/* Layout */
.sidebar-nav {
  position: fixed; left: 0; top: 0; bottom: 0; width: var(--sidebar-w);
  background: var(--white); border-right: 1px solid var(--border);
  z-index: 100; display: flex; flex-direction: column;
  padding: 0 0 24px;
}
.brand-logo {
  display: flex; flex-direction: column; justify-content: center;
  height: 72px; padding: 0 24px; border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.brand-logo .brand-main {
  font-size: 24px; font-weight: 800; color: var(--primary);
  letter-spacing: 0.5px; line-height: 1.3;
}
.brand-logo .brand-sub {
  font-size: 12px; font-weight: 400; color: var(--accent-dark);
  letter-spacing: 2px; line-height: 1.3;
}
.main-nav { flex: 1; padding-top: 16px; overflow-y: auto; }
.main-nav .nav-item {
  display: flex; align-items: center; gap: 12px;
  height: 48px; padding: 0 24px;
  font-size: 15px; font-weight: 500; color: var(--text-main);
  border-left: 3px solid transparent;
  transition: background .2s ease, color .2s ease;
}
.main-nav .nav-item i { width: 20px; text-align: center; color: var(--text-sub); transition: color .2s ease; }
.main-nav .nav-item:hover { background: var(--primary-tint); color: var(--primary); }
.main-nav .nav-item:hover i { color: var(--primary); }
.main-nav .nav-item.active {
  background: var(--primary-tint); color: var(--primary);
  border-left-color: var(--primary); font-weight: 600;
}
.main-nav .nav-item.active i { color: var(--primary); }
.nav-bottom {
  padding: 16px 24px; border-top: 1px solid var(--border);
  display: flex; gap: 12px; justify-content: center;
}
.nav-bottom .service-btn {
  width: 42px; height: 42px; border-radius: 50%;
  background: var(--bg); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 17px; transition: all .2s ease;
}
.nav-bottom .service-btn:hover { background: var(--primary); color: var(--white); transform: translateY(-2px); box-shadow: var(--shadow-lg); }

.main-content { margin-left: var(--sidebar-w); min-height: 100vh; background: var(--bg); }

/* Mobile Header */
.mobile-header {
  display: none; position: sticky; top: 0; z-index: 200;
  height: 56px; background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--border);
  align-items: center; justify-content: space-between; padding: 0 16px;
}
.mobile-logo {
  font-size: 16px; font-weight: 800; color: var(--primary);
  line-height: 1.2; display: flex; flex-direction: column;
}
.mobile-logo span { font-size: 11px; font-weight: 400; color: var(--accent-dark); letter-spacing: 1px; }
.hamburger {
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  background: var(--bg); color: var(--text-main); font-size: 18px;
  display: flex; align-items: center; justify-content: center;
}
.hamburger:hover { background: var(--primary-tint); color: var(--primary); }
.mobile-drawer {
  display: none; position: fixed; top: 56px; left: 0; right: 0; bottom: 0;
  background: var(--white); z-index: 199; padding: 24px 16px;
  overflow-y: auto; border-bottom: 1px solid var(--border);
}
.mobile-drawer.open { display: block; }
.mobile-drawer .nav-item {
  display: flex; align-items: center; gap: 12px;
  height: 52px; padding: 0 16px; border-radius: var(--radius-md);
  font-size: 16px; font-weight: 500; color: var(--text-main);
  margin-bottom: 4px;
}
.mobile-drawer .nav-item i { width: 20px; text-align: center; color: var(--text-sub); }
.mobile-drawer .nav-item.active { background: var(--primary-tint); color: var(--primary); font-weight: 600; }
.mobile-drawer .nav-item.active i { color: var(--primary); }
.mobile-drawer .drawer-divider { border-top: 1px solid var(--border); margin: 16px 0; }
.mobile-drawer .drawer-service { display: flex; gap: 12px; justify-content: center; }

/* Container */
.container { max-width: var(--content-max); margin: 0 auto; padding: 0 32px; }

/* Hero */
.hero {
  background: linear-gradient(135deg, rgba(14,124,123,0.10), rgba(14,124,123,0.03) 60%), var(--bg);
  padding: 64px 0 48px; position: relative; overflow: hidden;
}
.hero::after {
  content: ''; position: absolute; right: -80px; top: -80px;
  width: 260px; height: 260px; border-radius: 50%;
  background: var(--accent-tint); z-index: 0;
}
.hero .container { position: relative; z-index: 1; }
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.hero-text .hero-overline {
  font-size: 13px; font-weight: 500; color: var(--accent-dark);
  letter-spacing: 2px; text-transform: uppercase; margin-bottom: 12px;
  display: inline-flex; align-items: center; gap: 8px;
}
.hero-text .hero-overline i { color: var(--primary); }
.hero-text h1 {
  font-size: 40px; font-weight: 800; line-height: 1.3;
  color: var(--text-main); margin-bottom: 16px;
}
.hero-text h1 .h1-main { color: var(--primary); display: block; }
.hero-text h1 .h1-sub { color: var(--text-main); display: block; }
.hero-text .hero-desc {
  font-size: 18px; color: var(--text-sub); line-height: 1.6;
  margin-bottom: 32px; max-width: 480px;
}
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 48px; padding: 0 28px; border-radius: var(--radius-md);
  font-size: 16px; font-weight: 600; transition: all .2s ease;
  text-decoration: none; white-space: nowrap;
}
.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--primary-dark); color: var(--white); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-primary:active { transform: translateY(1px); }
.btn-secondary { background: var(--accent); color: var(--text-main); }
.btn-secondary:hover { background: var(--accent-dark); color: var(--text-main); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-secondary:active { transform: translateY(1px); }
.btn-outline { background: var(--white); border: 1px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary-tint); color: var(--primary); transform: translateY(-2px); }
.btn-white { background: var(--white); color: var(--primary); }
.btn-white:hover { background: var(--bg); color: var(--primary-dark); transform: translateY(-2px); }
.btn-ghost-white { background: transparent; border: 1px solid rgba(255,255,255,0.6); color: var(--white); }
.btn-ghost-white:hover { border-color: var(--white); background: rgba(255,255,255,0.1); color: var(--white); }
.hero-image { position: relative; }
.hero-image img {
  width: 100%; border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); height: 380px; object-fit: cover;
  border-bottom: 4px solid var(--accent);
}

/* Trust Bar */
.trust-bar { background: var(--white); border-bottom: 1px solid var(--border); padding: 32px 0; }
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.trust-item { display: flex; align-items: center; gap: 14px; }
.trust-item .trust-icon {
  width: 48px; height: 48px; border-radius: var(--radius-md);
  background: var(--primary-tint); color: var(--primary);
  display: flex; align-items: center; justify-content: center; font-size: 20px;
  flex-shrink: 0;
}
.trust-item .trust-label { font-size: 15px; font-weight: 600; color: var(--text-main); line-height: 1.3; }
.trust-item .trust-sub { font-size: 12px; color: var(--text-sub); margin-top: 2px; }

/* Section common */
.section { padding: 64px 0; }
.section-head { margin-bottom: 40px; }
.section-head .section-tag {
  font-size: 13px; font-weight: 600; color: var(--accent-dark);
  letter-spacing: 2px; text-transform: uppercase; display: block; margin-bottom: 8px;
}
.section-head h2 {
  font-size: 28px; font-weight: 700; color: var(--text-main);
  position: relative; padding-left: 16px; line-height: 1.4;
}
.section-head h2::before {
  content: ''; position: absolute; left: 0; top: 6px; bottom: 6px;
  width: 4px; background: var(--primary); border-radius: 2px;
}
.section-head p { font-size: 15px; color: var(--text-sub); margin-top: 8px; max-width: 640px; }

/* Comparison Table */
.compare-wrap { background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); overflow: hidden; }
.compare-scroll { overflow-x: auto; }
.compare-table { width: 100%; border-collapse: collapse; min-width: 640px; }
.compare-table th { padding: 16px 24px; font-size: 15px; font-weight: 700; text-align: center; border-bottom: 1px solid var(--border); }
.compare-table th.free-col { background: var(--bg); color: var(--text-sub); }
.compare-table th.vip-col { background: var(--primary-tint); color: var(--primary); border-bottom: 2px solid var(--primary); }
.compare-table td { padding: 14px 24px; font-size: 14px; text-align: center; border-bottom: 1px solid var(--border); height: 56px; }
.compare-table td.free-col { background: var(--bg); color: var(--text-sub); }
.compare-table td.vip-col { background: var(--primary-tint); color: var(--text-main); }
.compare-table tr:last-child td { border-bottom: none; }
.compare-table tr:hover td { background: var(--accent-tint); }
.compare-table td .icon-check { color: var(--success); margin-right: 4px; }
.compare-table td .icon-limit { color: #CBD5E1; margin-right: 4px; }
.compare-note { font-size: 12px; color: var(--text-sub); padding: 12px 24px; background: var(--white); border-top: 1px solid var(--border); text-align: center; }

/* Level Cards */
.level-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.level-card {
  background: var(--white); border-radius: var(--radius-lg); border: 1px solid var(--border);
  overflow: hidden; transition: all .25s ease; box-shadow: var(--shadow-sm);
}
.level-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.level-card .level-ribbon { height: 6px; transition: height .25s ease; }
.level-card:hover .level-ribbon { height: 10px; }
.level-card .level-body { padding: 28px 24px 24px; }
.level-card .level-icon {
  width: 48px; height: 48px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; margin-bottom: 16px;
}
.level-card .level-name { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.level-card .level-desc { font-size: 14px; color: var(--text-sub); margin-bottom: 16px; }
.level-card .level-perks { list-style: none; }
.level-card .level-perks li {
  font-size: 13px; color: var(--text-main); padding: 8px 0;
  border-bottom: 1px dashed var(--border); display: flex; align-items: center; gap: 10px;
  transition: padding-left .2s ease;
}
.level-card .level-perks li:last-child { border-bottom: none; }
.level-card .level-perks li i { color: var(--accent-dark); font-size: 12px; }
.level-card:hover .level-perks li { padding-left: 4px; }

/* Exclusive Preview */
.preview-grid { display: grid; grid-template-columns: 55% 45%; gap: 32px; align-items: stretch; }
.preview-main { position: relative; border-radius: var(--radius-lg); overflow: hidden; min-height: 300px; }
.preview-main img { width: 100%; height: 100%; min-height: 300px; object-fit: cover; }
.preview-main .preview-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(14,124,123,0.2), transparent);
}
.preview-list { display: flex; flex-direction: column; gap: 16px; }
.preview-item {
  display: flex; align-items: center; gap: 16px;
  background: var(--white); border-radius: var(--radius-md);
  padding: 12px; border: 1px solid var(--border);
  transition: all .2s ease; position: relative; overflow: hidden;
}
.preview-item:hover { background: var(--primary-tint); border-color: var(--primary); }
.preview-item::after {
  content: ''; position: absolute; left: -2px; top: 10%; bottom: 10%; width: 3px;
  background: var(--primary); border-radius: 2px; opacity: 0; transition: opacity .2s ease;
}
.preview-item:hover::after { opacity: 1; }
.preview-item img { width: 64px; height: 64px; border-radius: var(--radius-sm); flex-shrink: 0; }
.preview-item .preview-info { flex: 1; min-width: 0; }
.preview-item .preview-title { font-size: 14px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.preview-item .preview-excerpt { font-size: 12px; color: var(--text-sub); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; margin-top: 2px; }
.preview-more { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; color: var(--primary); margin-top: 8px; padding: 8px 0; }
.preview-more:hover { color: var(--accent-dark); gap: 12px; }

/* FAQ */
.faq-wrap { background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); border: 1px solid var(--border); padding: 8px 24px 24px; }
.accordion { margin: 0 !important; }
.accordion-item {
  border: none !important; border-bottom: 1px solid var(--border) !important;
  background: none !important; margin: 0 !important;
}
.accordion-item:first-of-type { border-top: 2px solid var(--primary) !important; }
.accordion-title {
  position: relative; font-size: 15px !important; font-weight: 600 !important;
  color: var(--text-main) !important; padding: 18px 40px 18px 24px !important;
  background: none !important; border: none !important; line-height: 1.5 !important;
}
.accordion-title::before {
  content: '\f111'; font-family: 'Font Awesome 6 Free'; font-weight: 400;
  position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  font-size: 14px; color: var(--primary); width: 16px; text-align: center;
}
.accordion-title::after {
  content: '\f107'; font-family: 'Font Awesome 6 Free'; font-weight: 900;
  position: absolute; right: 16px; top: 50%; transform: translateY(-50%);
  font-size: 16px; color: var(--text-sub); transition: transform .2s ease;
  background: none !important; border: none !important; box-shadow: none !important;
  margin: 0 !important; width: auto; height: auto;
}
.accordion-item.is-active > .accordion-title::after { transform: translateY(-50%) rotate(180deg); }
.accordion-content {
  border: none !important; background: none !important;
  padding: 0 24px 20px 24px !important; color: var(--text-sub) !important;
  font-size: 14px; line-height: 1.8;
}
.accordion-content p { font-size: 14px; color: var(--text-sub); }

/* CTA */
.cta-section { padding: 40px 0; }
.cta-box {
  background: var(--primary); border-radius: var(--radius-lg);
  padding: 32px 48px; display: flex; align-items: center; justify-content: space-between;
  gap: 24px; flex-wrap: wrap; position: relative; overflow: hidden;
}
.cta-box .cta-title { color: var(--white); font-size: 24px; font-weight: 700; line-height: 1.3; }
.cta-box .cta-desc { color: rgba(255,255,255,0.85); font-size: 14px; margin-top: 4px; }
.cta-box .cta-buttons { display: flex; gap: 12px; flex-wrap: wrap; }
.cta-box::after {
  content: '\f0e7'; font-family: 'Font Awesome 6 Free'; font-weight: 900;
  position: absolute; right: -20px; top: -20px; font-size: 120px;
  color: rgba(255,255,255,0.04); transform: rotate(15deg);
}

/* News */
.news-card {
  display: flex; align-items: center; gap: 20px;
  background: var(--white); border-radius: var(--radius-md);
  border: 1px solid var(--border); padding: 12px;
  margin-bottom: 16px; transition: all .2s ease;
  min-height: 100px;
}
.news-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); border-color: var(--primary); }
.news-card .news-thumb { width: 140px; height: 90px; border-radius: var(--radius-sm); overflow: hidden; flex-shrink: 0; }
.news-card .news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-card .news-body { flex: 1; min-width: 0; }
.news-card .news-title {
  font-size: 16px; font-weight: 600; color: var(--text-main);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  margin-bottom: 4px;
}
.news-card .news-summary {
  font-size: 13px; color: var(--text-sub);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden; line-height: 1.6;
}
.news-card .news-meta { display: flex; align-items: center; gap: 12px; margin-top: 6px; font-size: 12px; color: var(--text-sub); }
.news-card .news-cat {
  padding: 2px 10px; border-radius: 4px;
  background: var(--primary-tint); color: var(--primary); font-size: 12px;
}
.news-card .news-arrow { width: 32px; height: 32px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; border-radius: 50%; background: var(--bg); color: var(--text-sub); transition: all .2s ease; }
.news-card:hover .news-arrow { background: var(--primary); color: var(--white); }
.news-empty {
  background: #F3F4F6; border-radius: var(--radius-md); height: 120px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 8px; color: var(--text-sub);
}
.news-empty .empty-icon { font-size: 24px; color: var(--text-sub); }

/* Footer */
.site-footer { background: var(--bg); border-top: 2px solid var(--border); padding: 48px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 32px; }
.footer-brand .footer-logo {
  font-size: 22px; font-weight: 800; color: var(--primary); display: block; line-height: 1.3;
}
.footer-brand .footer-logo-sub { font-size: 12px; color: var(--accent-dark); letter-spacing: 1.5px; }
.footer-brand p { font-size: 14px; color: var(--text-sub); margin-top: 12px; line-height: 1.7; }
.footer-col h4 { font-size: 15px; font-weight: 700; margin-bottom: 16px; position: relative; padding-bottom: 8px; }
.footer-col h4::after { content: ''; position: absolute; left: 0; bottom: 0; width: 32px; height: 3px; background: var(--accent); border-radius: 2px; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: 14px; color: var(--text-sub); }
.footer-col ul li a:hover { color: var(--primary); padding-left: 4px; }
.footer-copyright {
  border-top: 1px solid var(--border); padding: 16px 0;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px;
  font-size: 13px; color: var(--text-sub);
}
.footer-copyright .copy-brand { font-weight: 600; color: var(--primary); }
.footer-top-btn { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--primary); font-weight: 600; }

/* Foundation Overrides */
.accordion { background: none; }
.accordion-item { background: none; border: none; }
.accordion-title:hover, .accordion-title:focus { background: none !important; color: var(--primary) !important; }

/* Responsive */
@media (max-width: 1200px) {
  .sidebar-nav { display: none; }
  .mobile-header { display: flex; }
  .main-content { margin-left: 0; }
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-text h1 { font-size: 34px; }
  .hero-image img { height: 280px; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .level-grid { grid-template-columns: repeat(2, 1fr); }
  .preview-grid { grid-template-columns: 1fr; }
  .cta-box { padding: 24px; }
}
@media (max-width: 1024px) {
  .section { padding: 48px 0; }
  .container { padding: 0 24px; }
  .level-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  body { font-size: 15px; }
  .container { padding: 0 16px; }
  .section { padding: 40px 0; }
  .hero { padding: 40px 0 32px; }
  .hero-text h1 { font-size: 30px; }
  .hero-desc { font-size: 16px; }
  .hero-image img { height: 220px; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .trust-item .trust-icon { width: 36px; height: 36px; font-size: 16px; }
  .trust-item .trust-label { font-size: 13px; }
  .section-head h2 { font-size: 24px; }
  .news-card { flex-direction: row; gap: 12px; padding: 8px; }
  .news-card .news-thumb { width: 90px; height: 70px; }
  .news-card .news-title { font-size: 14px; }
  .news-card .news-summary { display: none; }
  .news-card .news-arrow { display: none; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-copyright { flex-direction: column; text-align: center; }
  .cta-box { flex-direction: column; align-items: flex-start; }
  .cta-box .cta-buttons { width: 100%; }
  .cta-box .btn { width: 100%; }
  .compare-scroll { -webkit-overflow-scrolling: touch; }
  .accordion-title { font-size: 14px !important; padding: 16px 36px 16px 20px !important; }
  .accordion-content { padding: 0 16px 16px !important; }
  .preview-main { min-height: 200px; }
  .preview-main img { min-height: 200px; }
  .btn { height: 44px; padding: 0 20px; font-size: 15px; }
}
@media (max-width: 520px) {
  .trust-grid { grid-template-columns: 1fr 1fr; }
  .hero-text h1 { font-size: 26px; }
  .hero-buttons { flex-direction: column; width: 100%; }
  .hero-buttons .btn { width: 100%; }
  .section-head h2 { font-size: 20px; }
  .news-card .news-thumb { width: 80px; height: 60px; }
  .news-meta { flex-wrap: wrap; gap: 6px; }
}

/* roulang page: article */
:root {
  --primary: #0E7C7B;
  --primary-dark: #0B6867;
  --accent: #F2A93B;
  --accent-dark: #E09224;
  --bg: #F7F5F0;
  --text: #1F2937;
  --text-sub: #6B7280;
  --border: #E5E7EB;
  --white: #FFFFFF;
  --success: #16A34A;
  --danger: #DC2626;
  --info: #F59E0B;
  --radius-lg: 16px;
  --radius-md: 12px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-hover: 0 8px 24px rgba(14,124,123,0.12);
  --transition: all 0.2s ease;
  --sidebar-w: 260px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: #F3F4F6;
}

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

a:hover {
  color: var(--primary-dark);
}

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

ul, ol {
  list-style: none;
}

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

/* ========== 桌面端左侧导航 ========== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-w);
  background: var(--white);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
}

.brand {
  height: 72px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 24px;
  border-bottom: 1px solid var(--border);
}

.logo-main {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.3;
  letter-spacing: 1px;
}

.logo-sub {
  font-size: 12px;
  font-weight: 400;
  color: var(--accent);
  letter-spacing: 2px;
}

.main-nav {
  flex: 1;
  padding: 16px 0;
  display: flex;
  flex-direction: column;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 48px;
  padding: 0 24px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-sub);
  border-left: 3px solid transparent;
  transition: var(--transition);
}

.nav-item i {
  width: 20px;
  text-align: center;
  color: var(--text-sub);
  transition: var(--transition);
}

.nav-item:hover {
  background: rgba(14,124,123,0.06);
  color: var(--primary);
}

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

.nav-item.active {
  border-left-color: var(--primary);
  color: var(--primary);
  background: rgba(14,124,123,0.06);
  font-weight: 600;
}

.nav-item.active i {
  color: var(--primary);
}

.side-contact {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 12px;
}

.contact-circle {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(14,124,123,0.08);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 16px;
  transition: var(--transition);
}

.contact-circle:hover {
  background: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ========== 移动端顶部导航 ========== */
.mobile-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 56px;
  padding: 0 16px;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  display: none;
  align-items: center;
  justify-content: space-between;
}

.mobile-brand {
  font-size: 17px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}

.mobile-brand small {
  display: block;
  font-size: 10px;
  font-weight: 400;
  color: var(--accent);
  letter-spacing: 1px;
}

.hamburger {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--white);
  color: var(--text);
  font-size: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.hamburger:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.hamburger:focus-visible,
.nav-item:focus-visible,
.btn:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  box-shadow: 0 0 0 3px rgba(242,169,59,0.2);
}

.mobile-drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: var(--bg);
  z-index: 1050;
  padding: 20px 24px;
  overflow-y: auto;
  transform: translateX(-100%);
  transition: transform 0.25s ease;
}

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

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.mobile-drawer .main-nav {
  padding: 0;
}

.mobile-drawer .nav-item {
  border-left: none;
  border-radius: 12px;
  padding: 0 16px;
  margin-bottom: 4px;
}

.mobile-drawer .nav-item.active {
  background: rgba(14,124,123,0.08);
}

.mobile-drawer-extra {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 12px;
}

/* ========== 主内容区 ========== */
.main-wrapper {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page-main {
  flex: 1;
  padding: 40px 0 64px;
}

.page-article .article-wrap {
  max-width: 980px;
  margin: 0 auto;
}

/* ========== 面包屑 ========== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 24px;
  padding: 12px 16px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.breadcrumb a {
  color: var(--primary);
  font-weight: 500;
}

.breadcrumb .sep {
  color: var(--border);
}

.breadcrumb .current {
  color: var(--text);
  max-width: 280px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ========== 文章头部 ========== */
.article-header {
  margin-bottom: 32px;
}

.article-header h1 {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.35;
  color: var(--text);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 14px;
  color: var(--text-sub);
}

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

.article-meta i {
  color: var(--primary);
  font-size: 14px;
}

/* ========== 文章正文 ========== */
.article-content {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 48px;
  box-shadow: var(--shadow-sm);
}

.article-body {
  max-width: 760px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.9;
  color: var(--text);
}

.article-body p {
  margin-bottom: 1.5em;
}

.article-body h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 2em 0 0.8em;
  padding-left: 12px;
  border-left: 4px solid var(--primary);
  line-height: 1.4;
}

.article-body h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 1.6em 0 0.6em;
  line-height: 1.4;
}

.article-body ul,
.article-body ol {
  margin: 0 0 1.5em 1.5em;
  padding: 0;
}

.article-body ul {
  list-style: disc;
}

.article-body ol {
  list-style: decimal;
}

.article-body li {
  margin-bottom: 0.5em;
}

.article-body blockquote {
  margin: 1.5em 0;
  padding: 16px 20px;
  background: rgba(242,169,59,0.08);
  border-left: 4px solid var(--accent);
  border-radius: 0 12px 12px 0;
  color: var(--text-sub);
}

.article-body img {
  border-radius: 12px;
  margin: 1.2em 0;
}

.article-body a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.article-body hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2.5em 0;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 15px;
}

.article-body th,
.article-body td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
}

.article-body th {
  background: rgba(14,124,123,0.06);
  font-weight: 600;
}

/* ========== 文章底部导航 ========== */
.article-footer-nav {
  max-width: 760px;
  margin: 32px auto 0;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.prev-link,
.next-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--white);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}

.prev-link:hover,
.next-link:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

/* ========== 相关推荐 ========== */
.related-section {
  margin-top: 56px;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 24px;
}

.section-title::before {
  content: "";
  width: 4px;
  height: 24px;
  background: var(--primary);
  border-radius: 2px;
}

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

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

.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(14,124,123,0.3);
}

.related-card img {
  width: 100%;
  height: 180px;
}

.related-card-body {
  padding: 20px;
}

.related-card-body h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.4;
}

.related-card-body p {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 10px;
}

.related-card-body .meta {
  font-size: 13px;
  color: var(--text-sub);
}

.back-list {
  margin-top: 40px;
  text-align: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: var(--transition);
  cursor: pointer;
  text-decoration: none;
  line-height: 1;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: var(--white);
  box-shadow: var(--shadow-hover);
}

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

.btn-outline:hover {
  background: rgba(14,124,123,0.06);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.btn-light {
  background: var(--white);
  color: var(--primary);
}

.btn-light:hover {
  background: var(--bg);
  color: var(--primary-dark);
  box-shadow: var(--shadow-hover);
}

.btn-outline-light {
  background: transparent;
  border-color: rgba(255,255,255,0.7);
  color: var(--white);
}

.btn-outline-light:hover {
  background: rgba(255,255,255,0.12);
  border-color: var(--white);
  color: var(--white);
}

/* ========== 会员 CTA ========== */
.member-cta {
  margin-top: 56px;
  background: var(--primary);
  border-radius: var(--radius-lg);
  padding: 32px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.cta-text h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 6px;
}

.cta-text p {
  font-size: 14px;
  color: rgba(255,255,255,0.85);
}

.cta-actions {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}

/* ========== 内容未找到 ========== */
.not-found {
  max-width: 620px;
  margin: 80px auto;
  padding: 48px 40px;
  text-align: center;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.not-found i {
  font-size: 48px;
  color: var(--text-sub);
  margin-bottom: 16px;
}

.not-found h1 {
  font-size: 30px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}

.not-found p {
  font-size: 15px;
  color: var(--text-sub);
  margin-bottom: 24px;
}

/* ========== 页脚 ========== */
.site-footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 48px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-logo {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.3;
}

.footer-logo-sub {
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 1px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  margin-top: 8px;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 14px;
}

.footer-col ul {
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col li {
  font-size: 14px;
}

.footer-col a {
  color: var(--text-sub);
}

.footer-col a:hover {
  color: var(--primary);
}

.footer-copyright {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  border-top: 1px solid var(--border);
  padding-top: 20px;
  font-size: 13px;
  color: var(--text-sub);
}

.footer-copyright .copy-brand {
  color: var(--primary);
  font-weight: 600;
}

/* ========== 响应式 ========== */
@media (max-width: 1200px) {
  .sidebar {
    display: none;
  }

  .mobile-header {
    display: flex;
  }

  .main-wrapper {
    margin-left: 0;
  }

  .mobile-drawer {
    display: block;
  }
}

@media (max-width: 1024px) {
  .related-grid {
    grid-template-columns: 1fr;
    max-width: 620px;
  }

  .article-content {
    padding: 28px 24px;
  }

  .article-header h1 {
    font-size: 30px;
  }
}

@media (max-width: 768px) {
  .page-main {
    padding: 24px 0 48px;
  }

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

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

  .article-content {
    padding: 20px 16px;
    border-radius: 12px;
  }

  .article-body {
    font-size: 15px;
    line-height: 1.85;
  }

  .article-body h2 {
    font-size: 21px;
  }

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

  .article-body table {
    font-size: 13px;
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  .article-footer-nav {
    flex-direction: column;
  }

  .prev-link,
  .next-link {
    justify-content: center;
  }

  .section-title {
    font-size: 22px;
  }

  .related-grid {
    grid-template-columns: 1fr;
    max-width: 100%;
  }

  .related-card img {
    height: 200px;
  }

  .member-cta {
    flex-direction: column;
    text-align: center;
    padding: 28px 20px;
  }

  .cta-actions {
    flex-direction: column;
    width: 100%;
  }

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

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

  .footer-brand {
    grid-column: span 2;
  }

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

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

  .breadcrumb {
    font-size: 13px;
    padding: 10px 12px;
  }

  .breadcrumb .current {
    max-width: 160px;
  }

  .article-header h1 {
    font-size: 24px;
  }

  .not-found {
    padding: 32px 20px;
  }

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

  .footer-brand {
    grid-column: span 1;
  }
}

/* roulang page: category1 */
:root {
      --color-primary: #0E7C7B;
      --color-primary-dark: #0B6867;
      --color-primary-light: rgba(14, 124, 123, 0.08);
      --color-accent: #F2A93B;
      --color-accent-dark: #E09224;
      --color-accent-light: rgba(242, 169, 59, 0.15);
      --color-bg: #F7F5F0;
      --color-surface: #FFFFFF;
      --color-text: #1F2937;
      --color-text-sub: #6B7280;
      --color-border: #E5E7EB;
      --color-success: #16A34A;
      --color-danger: #DC2626;
      --color-info: #F59E0B;
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --shadow-default: 0 2px 8px rgba(0, 0, 0, 0.06);
      --shadow-hover: 0 8px 24px rgba(14, 124, 123, 0.12);
      --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --sidebar-width: 260px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-main);
      background: var(--color-bg);
      color: var(--color-text);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--color-primary);
      text-decoration: none;
      transition: all 0.2s ease;
    }

    a:hover {
      color: var(--color-primary-dark);
    }

    a:focus-visible,
    button:focus-visible {
      outline: 2px solid var(--color-accent);
      outline-offset: 2px;
    }

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

    ul {
      list-style: none;
    }

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

    /* ===== Side Navigation ===== */
    .site-shell {
      display: flex;
      min-height: 100vh;
    }

    .side-nav {
      width: 260px;
      position: fixed;
      top: 0;
      bottom: 0;
      left: 0;
      background: var(--color-surface);
      border-right: 1px solid var(--color-border);
      z-index: 100;
      display: flex;
      flex-direction: column;
    }

    .brand-area {
      height: 72px;
      border-bottom: 1px solid var(--color-border);
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 0 24px;
    }

    .brand-main {
      font-size: 22px;
      font-weight: 800;
      color: var(--color-primary);
      line-height: 1.2;
      letter-spacing: -0.3px;
    }

    .brand-sub {
      font-size: 12px;
      color: var(--color-accent);
      letter-spacing: 2px;
      line-height: 1.4;
      margin-top: 2px;
    }

    .main-nav {
      flex: 1;
      padding: 16px 0;
      display: flex;
      flex-direction: column;
      gap: 2px;
    }

    .nav-item {
      display: flex;
      align-items: center;
      gap: 12px;
      height: 48px;
      padding: 0 24px;
      font-size: 15px;
      color: var(--color-text);
      position: relative;
      border-radius: 0 10px 10px 0;
      font-weight: 500;
    }

    .nav-item i {
      width: 20px;
      text-align: center;
      color: var(--color-text-sub);
      font-size: 16px;
      transition: color 0.2s ease;
    }

    .nav-item:hover {
      background: rgba(14, 124, 123, 0.06);
      color: var(--color-primary);
    }

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

    .nav-item.active {
      background: rgba(14, 124, 123, 0.08);
      color: var(--color-primary);
      font-weight: 600;
    }

    .nav-item.active::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 3px;
      height: 24px;
      background: var(--color-primary);
      border-radius: 0 3px 3px 0;
    }

    .nav-item.active i {
      color: var(--color-primary);
    }

    .nav-sidebar-bottom {
      border-top: 1px solid var(--color-border);
      padding: 16px 24px;
      display: flex;
      gap: 12px;
    }

    .service-icon {
      width: 42px;
      height: 42px;
      border: 1px solid var(--color-border);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--color-text-sub);
      background: var(--color-surface);
      font-size: 16px;
      transition: all 0.2s ease;
    }

    .service-icon:hover {
      color: var(--color-primary);
      border-color: var(--color-primary);
      transform: translateY(-2px);
      box-shadow: var(--shadow-default);
    }

    .main-area {
      flex: 1;
      margin-left: 260px;
      min-width: 0;
      display: flex;
      flex-direction: column;
    }

    main {
      flex: 1;
    }

    /* ===== Mobile Header ===== */
    .mobile-header {
      display: none;
      position: sticky;
      top: 0;
      z-index: 200;
      height: 56px;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--color-border);
      align-items: center;
      justify-content: space-between;
      padding: 0 16px;
    }

    .mobile-brand {
      font-size: 20px;
      font-weight: 800;
      color: var(--color-primary);
      line-height: 1.2;
    }

    .mobile-brand small {
      display: block;
      font-size: 10px;
      color: var(--color-accent);
      font-weight: 400;
      letter-spacing: 1px;
    }

    .hamburger {
      width: 44px;
      height: 44px;
      border: 1px solid var(--color-border);
      background: var(--color-surface);
      border-radius: var(--radius-sm);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 5px;
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .hamburger:hover {
      border-color: var(--color-primary);
    }

    .hamburger span {
      width: 18px;
      height: 2px;
      background: var(--color-text);
      border-radius: 2px;
      transition: all 0.2s ease;
    }

    .hamburger:hover span {
      background: var(--color-primary);
    }

    .mobile-menu {
      position: fixed;
      inset: 0;
      background: var(--color-surface);
      z-index: 300;
      padding: 20px 24px;
      display: flex;
      flex-direction: column;
      transform: translateX(100%);
      transition: transform 0.3s ease;
    }

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

    .mobile-menu-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--color-border);
      margin-bottom: 20px;
    }

    .mm-brand {
      font-size: 20px;
      font-weight: 800;
      color: var(--color-primary);
    }

    .mm-close {
      width: 40px;
      height: 40px;
      border: 1px solid var(--color-border);
      background: var(--color-surface);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      color: var(--color-text-sub);
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .mm-close:hover {
      color: var(--color-danger);
      border-color: var(--color-danger);
    }

    .mm-nav {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }

    .mm-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 14px 16px;
      font-size: 16px;
      font-weight: 500;
      color: var(--color-text);
      border-radius: var(--radius-md);
      border: 1px solid transparent;
      transition: all 0.2s ease;
    }

    .mm-item i {
      width: 20px;
      text-align: center;
      color: var(--color-text-sub);
    }

    .mm-item:hover {
      background: rgba(14, 124, 123, 0.06);
      color: var(--color-primary);
    }

    .mm-item.active {
      background: rgba(14, 124, 123, 0.08);
      color: var(--color-primary);
      font-weight: 600;
      border-color: rgba(14, 124, 123, 0.12);
    }

    .mm-item.active i {
      color: var(--color-primary);
    }

    .mm-contact {
      margin-top: auto;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      padding-top: 20px;
      border-top: 1px solid var(--color-border);
    }

    .mm-contact-btn {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      height: 46px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      color: var(--color-text-sub);
      font-size: 14px;
      font-weight: 500;
      transition: all 0.2s ease;
    }

    .mm-contact-btn:hover {
      color: var(--color-primary);
      border-color: var(--color-primary);
      background: rgba(14, 124, 123, 0.04);
    }

    /* ===== Cat Hero ===== */
    .cat-hero {
      padding: 56px 0 44px;
      background: rgba(14, 124, 123, 0.05);
      position: relative;
      border-bottom: 1px solid var(--color-border);
      overflow: hidden;
    }

    .cat-hero::after {
      content: '';
      position: absolute;
      right: -60px;
      top: -60px;
      width: 240px;
      height: 240px;
      border-radius: 50%;
      background: rgba(242, 169, 59, 0.08);
    }

    .breadcrumb {
      font-size: 14px;
      color: var(--color-text-sub);
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 28px;
    }

    .breadcrumb a {
      color: var(--color-text-sub);
    }

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

    .breadcrumb i {
      font-size: 10px;
      color: #C4C9CF;
    }

    .cat-badge {
      display: inline-block;
      font-size: 12px;
      letter-spacing: 4px;
      font-weight: 700;
      color: var(--color-accent);
      text-transform: uppercase;
      margin-bottom: 8px;
    }

    .cat-hero h1 {
      font-size: 38px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
      color: var(--color-text);
    }

    .cat-hero-desc {
      font-size: 17px;
      max-width: 680px;
      color: var(--color-text-sub);
      line-height: 1.8;
    }

    .cat-hero-meta {
      display: flex;
      gap: 12px;
      margin-top: 28px;
      flex-wrap: wrap;
    }

    .meta-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--color-text);
      background: var(--color-surface);
      border: 1px solid var(--color-border);
      padding: 8px 16px;
      border-radius: 999px;
    }

    .meta-item i {
      color: var(--color-primary);
    }

    /* ===== About Section ===== */
    .cat-about {
      padding: 64px 0;
    }

    .about-text h2 {
      font-size: 28px;
      font-weight: 700;
      margin-bottom: 16px;
      position: relative;
      padding-left: 16px;
      line-height: 1.4;
    }

    .about-text h2::before {
      content: '';
      position: absolute;
      left: 0;
      top: 6px;
      width: 4px;
      height: 22px;
      background: var(--color-primary);
      border-radius: 2px;
    }

    .about-text p {
      color: var(--color-text-sub);
      line-height: 1.9;
      margin-bottom: 16px;
      font-size: 15px;
    }

    .about-features {
      list-style: none;
      margin-top: 20px;
      display: grid;
      gap: 10px;
    }

    .about-features li {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 15px;
      color: var(--color-text);
    }

    .about-features li i {
      color: var(--color-accent);
      font-size: 14px;
    }

    .about-img-wrap {
      position: relative;
    }

    .about-img-wrap img {
      width: 100%;
      border-radius: var(--radius-lg);
      border: 2px solid var(--color-border);
      aspect-ratio: 4 / 3;
      object-fit: cover;
    }

    .about-img-wrap::after {
      content: '';
      position: absolute;
      bottom: -12px;
      left: -12px;
      width: 80px;
      height: 80px;
      border-bottom: 4px solid var(--color-accent);
      border-left: 4px solid var(--color-accent);
      border-radius: 0 0 0 16px;
      z-index: -1;
    }

    /* ===== Tier Section ===== */
    .tier-section {
      padding: 64px 0;
    }

    .section-head {
      margin-bottom: 40px;
    }

    .section-head .eyebrow {
      color: var(--color-accent);
      font-size: 12px;
      letter-spacing: 4px;
      font-weight: 700;
      text-transform: uppercase;
    }

    .section-head h2 {
      font-size: 30px;
      font-weight: 700;
      margin-top: 8px;
      line-height: 1.4;
    }

    .section-head p {
      color: var(--color-text-sub);
      font-size: 15px;
      margin-top: 8px;
      max-width: 640px;
      line-height: 1.8;
    }

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

    .tier-card {
      background: var(--color-surface);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      padding: 32px 24px 28px;
      position: relative;
      transition: all 0.3s ease;
      box-shadow: var(--shadow-default);
    }

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

    .tier-bar {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 6px;
      transition: height 0.3s ease;
      border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }

    .tier-card:hover .tier-bar {
      height: 8px;
    }

    .tier-starter .tier-bar {
      background: var(--color-primary);
    }

    .tier-premium .tier-bar {
      background: var(--color-accent);
    }

    .tier-ultimate .tier-bar {
      background: #374151;
    }

    .tier-icon {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 16px;
    }

    .tier-starter .tier-icon {
      background: rgba(14, 124, 123, 0.1);
      color: var(--color-primary);
    }

    .tier-premium .tier-icon {
      background: rgba(242, 169, 59, 0.15);
      color: #B87200;
    }

    .tier-ultimate .tier-icon {
      background: rgba(55, 65, 81, 0.1);
      color: #374151;
    }

    .tier-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 4px;
      line-height: 1.4;
    }

    .tier-tagline {
      font-size: 14px;
      color: var(--color-text-sub);
      margin-bottom: 16px;
    }

    .tier-card ul {
      list-style: none;
      display: grid;
      gap: 10px;
    }

    .tier-card li {
      font-size: 14px;
      color: var(--color-text);
      display: flex;
      align-items: center;
      gap: 8px;
      padding-top: 10px;
      border-top: 1px dashed var(--color-border);
      transition: padding-left 0.2s ease;
    }

    .tier-card li:first-child {
      border-top: 0;
      padding-top: 0;
    }

    .tier-card:hover li {
      padding-left: 4px;
    }

    .tier-card li i {
      color: var(--color-accent);
      font-size: 13px;
      flex-shrink: 0;
    }

    .tier-tag {
      position: absolute;
      top: 20px;
      right: 20px;
      background: var(--color-accent);
      color: var(--color-text);
      font-size: 12px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 999px;
      line-height: 1.4;
    }

    /* ===== Upgrade Process ===== */
    .upgrade-section {
      padding: 64px 0;
      background: var(--color-surface);
      border-top: 1px solid var(--color-border);
      border-bottom: 1px solid var(--color-border);
    }

    .step-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .step-item {
      text-align: center;
      padding: 28px 16px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      background: var(--color-bg);
      transition: all 0.3s ease;
    }

    .step-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    .step-num {
      font-size: 32px;
      font-weight: 800;
      color: rgba(14, 124, 123, 0.25);
      display: block;
      margin-bottom: 12px;
      line-height: 1;
    }

    .step-item h3 {
      font-size: 17px;
      font-weight: 600;
      margin-bottom: 8px;
      line-height: 1.4;
    }

    .step-item p {
      font-size: 13px;
      color: var(--color-text-sub);
      line-height: 1.7;
    }

    /* ===== Internal Link Cards ===== */
    .rel-section {
      padding: 64px 0;
    }

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

    .rel-card {
      display: flex;
      align-items: center;
      background: var(--color-surface);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      transition: all 0.3s ease;
    }

    .rel-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(14, 124, 123, 0.3);
    }

    .rel-info {
      flex: 1;
      padding: 24px;
    }

    .rel-info h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
      line-height: 1.4;
    }

    .rel-info p {
      font-size: 14px;
      color: var(--color-text-sub);
      line-height: 1.7;
      margin-bottom: 14px;
    }

    .rel-btn {
      color: var(--color-primary);
      font-size: 14px;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .rel-btn i {
      font-size: 13px;
      transition: transform 0.2s ease;
    }

    .rel-card:hover .rel-btn i {
      transform: translateX(4px);
    }

    .rel-thumb {
      width: 140px;
      height: 140px;
      flex-shrink: 0;
      position: relative;
    }

    .rel-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .rel-thumb::after {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(14, 124, 123, 0.08);
    }

    /* ===== FAQ Section ===== */
    .faq-section {
      padding: 64px 0;
      background: var(--color-surface);
      border-top: 1px solid var(--color-border);
      border-bottom: 1px solid var(--color-border);
    }

    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .faq-card {
      background: var(--color-bg);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      gap: 16px;
      transition: all 0.3s ease;
    }

    .faq-card:hover {
      box-shadow: var(--shadow-hover);
      border-color: rgba(14, 124, 123, 0.3);
      background: var(--color-surface);
    }

    .faq-num {
      font-size: 24px;
      font-weight: 800;
      color: var(--color-accent);
      line-height: 1;
      min-width: 36px;
    }

    .faq-card h3 {
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 8px;
      line-height: 1.5;
    }

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

    /* ===== CTA Section ===== */
    .cta-section {
      padding: 64px 0;
    }

    .member-cta {
      background: var(--color-primary);
      color: #fff;
      border-radius: var(--radius-lg);
      padding: 48px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 32px;
      position: relative;
      overflow: hidden;
    }

    .member-cta::before {
      content: '';
      position: absolute;
      right: -40px;
      top: -40px;
      width: 180px;
      height: 180px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.06);
    }

    .cta-content h2 {
      color: #fff;
      font-size: 26px;
      font-weight: 700;
      margin-bottom: 8px;
      line-height: 1.4;
    }

    .cta-content p {
      color: rgba(255, 255, 255, 0.85);
      font-size: 15px;
      line-height: 1.7;
    }

    .cta-buttons {
      display: flex;
      gap: 16px;
      flex-shrink: 0;
      position: relative;
      z-index: 2;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 48px;
      padding: 0 28px;
      border-radius: var(--radius-md);
      font-size: 15px;
      font-weight: 600;
      transition: all 0.2s ease;
      border: 2px solid transparent;
      cursor: pointer;
      line-height: 1;
    }

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

    .btn-white:hover {
      background: rgba(255, 255, 255, 0.92);
      color: var(--color-primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
    }

    .btn-outline-light {
      border-color: rgba(255, 255, 255, 0.7);
      color: #fff;
      background: transparent;
    }

    .btn-outline-light:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: #fff;
      transform: translateY(-2px);
    }

    /* ===== Footer ===== */
    .site-footer {
      background: var(--color-bg);
      border-top: 2px solid var(--color-border);
      padding: 48px 0 24px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 32px;
    }

    .footer-logo {
      font-size: 22px;
      font-weight: 800;
      color: var(--color-primary);
      display: block;
      line-height: 1.2;
    }

    .footer-logo-sub {
      font-size: 12px;
      color: var(--color-accent);
      letter-spacing: 2px;
    }

    .footer-brand p {
      font-size: 14px;
      color: var(--color-text-sub);
      margin-top: 12px;
      line-height: 1.7;
    }

    .footer-col h4 {
      font-size: 15px;
      font-weight: 600;
      margin-bottom: 16px;
      color: var(--color-text);
    }

    .footer-col ul {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-col ul a {
      color: var(--color-text-sub);
      font-size: 14px;
      transition: all 0.2s ease;
    }

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

    .footer-copyright {
      border-top: 1px solid var(--color-border);
      padding-top: 20px;
      display: flex;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
      font-size: 13px;
      color: var(--color-text-sub);
    }

    .copy-brand {
      color: var(--color-primary);
      font-weight: 600;
    }

    /* ===== Responsive ===== */
    @media (max-width: 1200px) {
      .site-shell {
        display: block;
      }

      .side-nav {
        display: none;
      }

      .main-area {
        margin-left: 0;
      }

      .mobile-header {
        display: flex;
      }
    }

    @media (max-width: 1024px) {
      .tier-grid {
        grid-template-columns: 1fr;
        max-width: 560px;
        margin: 0 auto;
      }

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

      .rel-links {
        grid-template-columns: 1fr;
      }

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

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

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

    @media (max-width: 768px) {
      body {
        font-size: 15px;
      }

      .container {
        padding: 0 16px;
      }

      .cat-hero {
        padding: 40px 0 36px;
      }

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

      .cat-hero-desc {
        font-size: 16px;
      }

      .cat-hero-meta {
        gap: 8px;
      }

      .cat-about,
      .tier-section,
      .upgrade-section,
      .rel-section,
      .faq-section,
      .cta-section {
        padding: 48px 0;
      }

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

      .member-cta {
        flex-direction: column;
        text-align: center;
        padding: 36px 24px;
      }

      .cta-buttons {
        flex-wrap: wrap;
        justify-content: center;
        width: 100%;
      }

      .btn {
        flex: 1;
        min-width: 140px;
        height: 44px;
        font-size: 14px;
      }

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

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

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

      .rel-thumb {
        width: 100%;
        height: 180px;
      }

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

      .about-img-wrap::after {
        display: none;
      }
    }

    @media (max-width: 520px) {
      .cat-hero h1 {
        font-size: 26px;
      }

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

      .meta-item {
        font-size: 13px;
        padding: 6px 12px;
      }

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

      .cta-buttons {
        flex-direction: column;
        width: 100%;
      }

      .btn {
        width: 100%;
      }
    }

/* roulang page: category2 */
:root {
      --primary: #0E7C7B;
      --primary-dark: #0B6867;
      --primary-light: #E6F3F2;
      --accent: #F2A93B;
      --accent-dark: #E09224;
      --bg: #F7F5F0;
      --white: #FFFFFF;
      --text: #1F2937;
      --text-sub: #6B7280;
      --border: #E5E7EB;
      --success: #16A34A;
      --error: #DC2626;
      --info: #F59E0B;
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
      --shadow-hover: 0 8px 24px rgba(14, 124, 123, 0.12);
      --nav-width: 260px;
      --transition: all 0.2s ease;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      font-size: 16px;
      line-height: 1.75;
      color: var(--text);
      background: var(--bg);
      -webkit-font-smoothing: antialiased;
    }

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

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

    a:hover {
      color: var(--primary-dark);
    }

    a:focus-visible,
    .btn:focus-visible,
    button:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 3px;
    }

    ul, ol {
      list-style: none;
    }

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 32px;
      width: 100%;
    }

    /* ===== 按钮 ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      height: 48px;
      padding: 0 28px;
      border-radius: var(--radius-md);
      font-size: 16px;
      font-weight: 600;
      line-height: 1;
      border: 1px solid transparent;
      transition: var(--transition);
      cursor: pointer;
      text-align: center;
      white-space: nowrap;
    }

    .btn i {
      font-size: 15px;
    }

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

    .btn-accent:hover {
      background: var(--accent-dark);
      color: var(--text);
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(242, 169, 59, 0.3);
    }

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

    .btn-outline:hover {
      background: var(--primary-light);
      color: var(--primary-dark);
      transform: translateY(-2px);
    }

    .btn-white {
      background: var(--white);
      color: var(--primary);
    }

    .btn-white:hover {
      background: #f0f0f0;
      color: var(--primary-dark);
      transform: translateY(-2px);
    }

    .btn-ghost {
      background: transparent;
      border-color: rgba(255, 255, 255, 0.7);
      color: var(--white);
    }

    .btn-ghost:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: var(--white);
      color: var(--white);
    }

    .btn:active {
      transform: translateY(1px);
      box-shadow: none;
    }

    /* ===== 侧边导航 ===== */
    .side-nav {
      position: fixed;
      left: 0;
      top: 0;
      bottom: 0;
      width: var(--nav-width);
      background: var(--white);
      border-right: 1px solid var(--border);
      display: flex;
      flex-direction: column;
      z-index: 1000;
    }

    .brand-block {
      display: flex;
      flex-direction: column;
      justify-content: center;
      height: 72px;
      padding: 0 24px;
      border-bottom: 1px solid var(--border);
    }

    .brand-line-1 {
      font-size: 22px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
      letter-spacing: 0.5px;
    }

    .brand-line-2 {
      font-size: 12px;
      font-weight: 400;
      color: var(--accent);
      line-height: 1.3;
      letter-spacing: 1px;
    }

    .main-nav {
      flex: 1;
      padding: 24px 0;
    }

    .nav-item {
      display: flex;
      align-items: center;
      gap: 12px;
      height: 48px;
      padding: 0 24px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text);
      border-left: 3px solid transparent;
      transition: var(--transition);
    }

    .nav-item i {
      width: 20px;
      text-align: center;
      font-size: 16px;
      color: var(--text-sub);
      transition: var(--transition);
    }

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

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

    .nav-item.active {
      background: var(--primary-light);
      color: var(--primary);
      border-left-color: var(--primary);
      font-weight: 600;
    }

    .nav-item.active i {
      color: var(--primary);
    }

    .nav-bottom {
      padding: 16px 24px;
      border-top: 1px solid var(--border);
    }

    .service-label {
      font-size: 12px;
      color: var(--text-sub);
      margin-bottom: 10px;
      text-align: center;
      letter-spacing: 1px;
    }

    .service-icons {
      display: flex;
      justify-content: center;
      gap: 12px;
    }

    .service-btn {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      border: 1px solid transparent;
      transition: var(--transition);
    }

    .service-btn:hover {
      background: var(--white);
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
      box-shadow: var(--shadow);
    }

    /* ===== 移动端导航 ===== */
    .mobile-top-nav {
      display: none;
    }

    .mobile-drawer {
      display: none;
    }

    /* ===== 主内容 ===== */
    .main-content {
      margin-left: var(--nav-width);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    .page-content {
      flex: 1;
    }

    /* ===== 板块通用 ===== */
    .section-head {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-head h2 {
      font-size: 28px;
      font-weight: 700;
      color: var(--text);
      line-height: 1.4;
      position: relative;
    }

    .section-head h2::after {
      content: "";
      display: block;
      width: 48px;
      height: 4px;
      background: var(--accent);
      border-radius: 2px;
      margin: 12px auto 0;
    }

    .section-head p {
      margin-top: 12px;
      font-size: 15px;
      color: var(--text-sub);
      max-width: 640px;
      margin-left: auto;
      margin-right: auto;
    }

    /* ===== Hero ===== */
    .cat-hero {
      position: relative;
      background: var(--primary-light);
      padding: 80px 0 100px;
      clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
      border-bottom: 1px solid var(--border);
    }

    .cat-hero-inner {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 56px;
      align-items: center;
    }

    .cat-eyebrow {
      display: inline-block;
      font-size: 14px;
      font-weight: 700;
      color: var(--accent);
      letter-spacing: 3px;
      text-transform: uppercase;
      margin-bottom: 8px;
    }

    .cat-hero h1 {
      font-size: 40px;
      font-weight: 800;
      color: var(--text);
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .cat-hero .hero-desc {
      font-size: 18px;
      color: var(--text-sub);
      line-height: 1.8;
      max-width: 520px;
      margin-bottom: 32px;
    }

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

    .cat-hero-visual img {
      width: 100%;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow);
      border-bottom: 4px solid var(--accent);
      object-fit: cover;
      height: 360px;
    }

    /* ===== 图文介绍区 ===== */
    .intro-section {
      padding: 80px 0;
    }

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

    .intro-img img {
      width: 100%;
      border-radius: var(--radius-lg);
      border: 2px solid var(--border);
      object-fit: cover;
      height: 380px;
    }

    .intro-text h2 {
      font-size: 28px;
      font-weight: 700;
      color: var(--text);
      line-height: 1.4;
      margin-bottom: 20px;
    }

    .intro-text p {
      font-size: 16px;
      color: var(--text-sub);
      line-height: 1.9;
      margin-bottom: 16px;
    }

    .intro-points {
      margin-top: 24px;
    }

    .intro-points li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 10px 0;
      font-size: 15px;
      color: var(--text);
      border-bottom: 1px dashed var(--border);
    }

    .intro-points li:last-child {
      border-bottom: none;
    }

    .intro-points li i {
      color: var(--primary);
      font-size: 16px;
      margin-top: 4px;
    }

    /* ===== 等级卡 ===== */
    .level-section {
      padding: 80px 0;
      background: var(--white);
    }

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

    .level-card {
      position: relative;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 40px 24px 28px;
      overflow: hidden;
      transition: var(--transition);
    }

    .level-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--primary);
    }

    .level-ribbon {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 6px;
      transition: height 0.3s;
    }

    .level-card:hover .level-ribbon {
      height: 8px;
    }

    .level-icon {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 16px;
    }

    .level-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 4px;
    }

    .level-desc {
      font-size: 14px;
      color: var(--text-sub);
      margin-bottom: 16px;
    }

    .level-list {
      margin-top: 8px;
      border-top: 1px dashed var(--border);
      padding-top: 16px;
    }

    .level-list li {
      font-size: 13px;
      line-height: 24px;
      color: var(--text);
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 4px 0;
    }

    .level-list li i {
      font-size: 13px;
      transition: transform 0.2s ease;
    }

    .level-card:hover .level-list li i {
      transform: translateX(2px);
    }

    /* ===== 对比表 ===== */
    .compare-section {
      padding: 80px 0;
      background: var(--bg);
    }

    .table-wrap {
      overflow-x: auto;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      background: var(--white);
      box-shadow: var(--shadow);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 680px;
    }

    .compare-table th {
      padding: 20px 24px;
      text-align: left;
      font-size: 15px;
      font-weight: 700;
      color: var(--text);
      border-bottom: 2px solid var(--border);
      background: var(--white);
    }

    .compare-table td {
      padding: 16px 24px;
      font-size: 14px;
      border-bottom: 1px solid var(--border);
      color: var(--text);
      height: 56px;
      vertical-align: middle;
    }

    .compare-table tr:nth-child(even) td {
      background: rgba(0, 0, 0, 0.02);
    }

    .compare-table tr:nth-child(even) td.highlight-col {
      background: rgba(14, 124, 123, 0.05);
    }

    .compare-table tr:last-child td {
      border-bottom: none;
    }

    .compare-table th.highlight-col {
      background: rgba(14, 124, 123, 0.05);
      border-left: 2px solid var(--accent);
      color: var(--primary);
    }

    .compare-table td.highlight-col {
      background: rgba(14, 124, 123, 0.05);
      border-left: 2px solid var(--accent);
      color: var(--primary);
      font-weight: 500;
    }

    .compare-table .free-text {
      color: var(--text-sub);
    }

    .check-default {
      color: var(--primary);
      font-size: 15px;
    }

    .check-accent {
      color: var(--accent);
      font-size: 15px;
    }

    .cross-mark {
      color: #9CA3AF;
      font-size: 15px;
    }

    .table-note {
      font-size: 12px;
      color: var(--text-sub);
      margin-top: 16px;
      text-align: right;
    }

    /* ===== 适用场景 ===== */
    .scene-section {
      padding: 80px 0;
      background: var(--white);
    }

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

    .scene-card {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 40px 28px;
      text-align: center;
      transition: var(--transition);
    }

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

    .scene-card .scene-icon {
      width: 72px;
      height: 72px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 28px;
      margin: 0 auto 20px;
      transition: var(--transition);
    }

    .scene-card:hover .scene-icon {
      background: var(--accent);
      color: var(--white);
      transform: scale(1.05);
    }

    .scene-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 12px;
    }

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

    /* ===== 流程 ===== */
    .process-section {
      padding: 80px 0;
      background: var(--bg);
    }

    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      position: relative;
    }

    .process-steps::before {
      content: "";
      position: absolute;
      top: 36px;
      left: 10%;
      right: 10%;
      height: 2px;
      background: var(--border);
      z-index: 0;
    }

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

    .step-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 72px;
      height: 72px;
      border-radius: 50%;
      background: var(--primary);
      color: var(--white);
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 20px;
      box-shadow: 0 4px 12px rgba(14, 124, 123, 0.25);
      transition: var(--transition);
    }

    .step-item:hover .step-num {
      background: var(--accent);
      color: var(--text);
      transform: scale(1.08);
    }

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

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

    /* ===== FAQ ===== */
    .faq-section {
      padding: 80px 0;
      background: var(--white);
    }

    .faq-accordion {
      max-width: 820px;
      margin: 0 auto;
      background: transparent;
    }

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

    .faq-accordion .accordion-item.is-active {
      border-color: var(--primary) !important;
      box-shadow: var(--shadow);
    }

    .faq-accordion .accordion-item:first-child {
      border-top: 2px solid var(--primary);
    }

    .faq-accordion .accordion-title {
      background: transparent;
      border: none;
      padding: 20px 56px 20px 24px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text);
      display: flex;
      align-items: center;
      gap: 14px;
      position: relative;
      min-height: 56px;
    }

    .faq-accordion .accordion-title:hover {
      background: transparent;
      color: var(--primary);
    }

    .faq-accordion .accordion-title::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--primary);
      flex-shrink: 0;
    }

    .faq-accordion .accordion-title::after {
      content: "\f078";
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      position: absolute;
      right: 20px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--primary);
      transition: transform 0.2s ease;
      font-size: 13px;
      background: transparent;
      border: none;
      width: auto;
      height: auto;
    }

    .faq-accordion .accordion-item.is-active > .accordion-title::after {
      transform: translateY(-50%) rotate(180deg);
    }

    .faq-accordion .accordion-content {
      padding: 0 24px 20px 46px;
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.9;
      background: transparent;
      border: none;
    }

    /* ===== 内链引导 ===== */
    .guide-links {
      padding: 80px 0;
      background: var(--bg);
    }

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

    .guide-card {
      display: flex;
      align-items: center;
      gap: 20px;
      padding: 28px 32px;
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      transition: var(--transition);
    }

    .guide-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-hover);
      transform: translateY(-3px);
    }

    .guide-icon {
      width: 56px;
      height: 56px;
      border-radius: var(--radius-md);
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      flex-shrink: 0;
      transition: var(--transition);
    }

    .guide-card:hover .guide-icon {
      background: var(--primary);
      color: var(--white);
    }

    .guide-text {
      flex: 1;
    }

    .guide-text h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 4px;
    }

    .guide-text p {
      font-size: 13px;
      color: var(--text-sub);
      line-height: 1.6;
    }

    .guide-card > .fa-arrow-right {
      color: var(--primary);
      font-size: 16px;
      transition: var(--transition);
      flex-shrink: 0;
    }

    .guide-card:hover > .fa-arrow-right {
      transform: translateX(4px);
      color: var(--accent);
    }

    /* ===== CTA ===== */
    .member-cta {
      padding: 56px 0;
      background: var(--primary);
      position: relative;
      overflow: hidden;
    }

    .member-cta::after {
      content: "";
      position: absolute;
      top: -40px;
      right: -40px;
      width: 180px;
      height: 180px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.06);
    }

    .cta-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 32px;
      position: relative;
      z-index: 1;
    }

    .cta-text h2 {
      color: var(--white);
      font-size: 26px;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .cta-text p {
      color: rgba(255, 255, 255, 0.85);
      font-size: 14px;
      line-height: 1.7;
    }

    .cta-actions {
      display: flex;
      gap: 16px;
      flex-shrink: 0;
    }

    /* ===== 页脚 ===== */
    .site-footer {
      background: var(--bg);
      border-top: 2px solid var(--border);
      padding: 48px 0 0;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 48px;
      padding-bottom: 40px;
      border-bottom: 1px solid var(--border);
    }

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

    .footer-logo {
      font-size: 22px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
    }

    .footer-logo-sub {
      font-size: 12px;
      color: var(--accent);
      letter-spacing: 1px;
      margin-top: 2px;
    }

    .footer-brand p {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.8;
      margin-top: 16px;
      max-width: 280px;
    }

    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 16px;
    }

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

    .footer-col ul li a {
      font-size: 14px;
      color: var(--text-sub);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

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

    .footer-col ul li span {
      font-size: 14px;
      color: var(--text-sub);
    }

    .footer-copyright {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      padding: 24px 0;
      font-size: 13px;
      color: var(--text-sub);
    }

    .copy-brand {
      color: var(--primary);
      font-weight: 700;
    }

    /* ===== 响应式断点 ===== */
    @media (max-width: 1199px) {
      .side-nav {
        display: none;
      }

      .mobile-top-nav {
        display: flex;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        height: 56px;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        border-bottom: 1px solid var(--border);
        align-items: center;
        justify-content: space-between;
        padding: 0 16px;
        z-index: 1100;
      }

      .mobile-brand {
        font-size: 16px;
        font-weight: 800;
        color: var(--primary);
        line-height: 1.2;
        display: flex;
        flex-direction: column;
      }

      .mobile-brand small {
        font-size: 10px;
        color: var(--accent);
        font-weight: 400;
        letter-spacing: 1px;
      }

      .menu-toggle {
        width: 40px;
        height: 40px;
        border-radius: var(--radius-sm);
        background: var(--primary-light);
        color: var(--primary);
        font-size: 18px;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: var(--transition);
      }

      .menu-toggle:hover {
        background: var(--primary);
        color: var(--white);
      }

      .mobile-drawer {
        display: block;
        position: fixed;
        top: 56px;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--white);
        z-index: 1090;
        padding: 16px 16px 32px;
        transform: translateY(-12px);
        opacity: 0;
        pointer-events: none;
        transition: all 0.25s ease;
        overflow-y: auto;
      }

      .mobile-drawer.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
      }

      .mobile-nav {
        display: flex;
        flex-direction: column;
        gap: 4px;
        padding-bottom: 24px;
        border-bottom: 1px solid var(--border);
        margin-bottom: 24px;
      }

      .mobile-nav-item {
        display: flex;
        align-items: center;
        gap: 14px;
        height: 52px;
        padding: 0 16px;
        border-radius: var(--radius-md);
        font-size: 16px;
        font-weight: 500;
        color: var(--text);
        transition: var(--transition);
      }

      .mobile-nav-item i {
        width: 22px;
        text-align: center;
        color: var(--text-sub);
      }

      .mobile-nav-item:hover {
        background: var(--primary-light);
        color: var(--primary);
      }

      .mobile-nav-item.active {
        background: var(--primary-light);
        color: var(--primary);
        font-weight: 600;
      }

      .mobile-nav-item.active i {
        color: var(--primary);
      }

      .mobile-nav-service {
        display: flex;
        flex-direction: column;
        gap: 12px;
      }

      .mobile-service-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        height: 48px;
        border-radius: var(--radius-md);
        background: var(--primary-light);
        color: var(--primary);
        font-size: 15px;
        font-weight: 600;
        transition: var(--transition);
      }

      .mobile-service-btn:hover {
        background: var(--primary);
        color: var(--white);
      }

      .main-content {
        margin-left: 0;
        padding-top: 56px;
      }
    }

    @media (max-width: 1024px) {
      .level-grid {
        grid-template-columns: repeat(2, 1fr);
      }

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

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

      .scene-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
      }

      .intro-grid {
        gap: 32px;
      }
    }

    @media (max-width: 768px) {
      .container {
        padding: 0 16px;
      }

      .cat-hero {
        padding: 48px 0 72px;
        clip-path: polygon(0 0, 100% 0, 100% 95%, 0 100%);
      }

      .cat-hero-inner {
        grid-template-columns: 1fr;
        gap: 32px;
      }

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

      .cat-hero .hero-desc {
        font-size: 16px;
      }

      .cat-hero-visual img {
        height: 240px;
      }

      .intro-section,
      .level-section,
      .compare-section,
      .scene-section,
      .process-section,
      .faq-section,
      .guide-links {
        padding: 56px 0;
      }

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

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

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

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

      .level-card {
        padding: 32px 24px;
      }

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

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

      .step-item {
        display: flex;
        align-items: center;
        gap: 16px;
        text-align: left;
        background: var(--white);
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        padding: 16px 20px;
      }

      .step-num {
        width: 52px;
        height: 52px;
        font-size: 14px;
        margin-bottom: 0;
        flex-shrink: 0;
      }

      .step-item h3 {
        margin-bottom: 4px;
        font-size: 16px;
      }

      .step-item p {
        font-size: 13px;
      }

      .faq-accordion .accordion-title {
        font-size: 14px;
        padding: 16px 44px 16px 16px;
      }

      .faq-accordion .accordion-content {
        padding: 0 16px 16px 32px;
        font-size: 13px;
      }

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

      .guide-card {
        padding: 20px;
      }

      .cta-inner {
        flex-direction: column;
        text-align: center;
      }

      .cta-actions {
        flex-direction: column;
        width: 100%;
      }

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

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

      .footer-copyright {
        flex-direction: column;
        text-align: center;
        gap: 4px;
      }
    }

    @media (max-width: 520px) {
      .cat-hero-actions {
        flex-direction: column;
        width: 100%;
      }

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

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

      .compare-table th,
      .compare-table td {
        padding: 14px 16px;
        font-size: 13px;
      }

      .table-note {
        text-align: left;
        margin-top: 12px;
      }

      .guide-card {
        flex-wrap: wrap;
      }

      .guide-icon {
        width: 44px;
        height: 44px;
        font-size: 18px;
      }
    }

/* roulang page: category3 */
:root {
      --primary: #0E7C7B;
      --primary-dark: #0B6867;
      --accent: #F2A93B;
      --accent-dark: #E09224;
      --bg: #F7F5F0;
      --text: #1F2937;
      --text-sub: #6B7280;
      --border: #E5E7EB;
      --success: #16A34A;
      --error: #DC2626;
      --white: #FFFFFF;
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
      --shadow-lg: 0 8px 24px rgba(14,124,123,0.12);
      --transition: all 0.2s ease;
    }

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

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      background: var(--bg);
      color: var(--text);
      font-size: 16px;
      line-height: 1.75;
    }

    h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 700; line-height: 1.4; }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: var(--transition);
    }
    a:hover { color: var(--primary-dark); }

    img {
      max-width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }
    ul { list-style: none; }

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

    /* ===== 左侧竖向导航（桌面端） ===== */
    .sidebar-nav {
      position: fixed;
      left: 0;
      top: 0;
      width: 260px;
      height: 100vh;
      background: var(--white);
      border-right: 1px solid var(--border);
      display: flex;
      flex-direction: column;
      z-index: 1000;
    }

    .logo-area {
      height: 72px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 0 24px;
      border-bottom: 1px solid var(--border);
    }
    .logo-main {
      font-size: 22px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.3;
      letter-spacing: 0.5px;
    }
    .logo-sub {
      font-size: 12px;
      color: var(--accent);
      font-weight: 400;
      letter-spacing: 1px;
    }

    .main-nav { flex: 1; padding-top: 16px; }
    .nav-item {
      display: flex;
      align-items: center;
      height: 48px;
      padding: 0 24px;
      font-size: 15px;
      color: var(--text);
      gap: 12px;
      border-left: 3px solid transparent;
      transition: var(--transition);
    }
    .nav-item i { width: 20px; text-align: center; font-size: 16px; color: var(--text-sub); }
    .nav-item:hover { background: rgba(14,124,123,0.06); color: var(--primary); }
    .nav-item:hover i { color: var(--primary); }
    .nav-item.active {
      background: rgba(14,124,123,0.06);
      color: var(--primary);
      font-weight: 600;
      border-left-color: var(--primary);
    }
    .nav-item.active i { color: var(--primary); }

    .sidebar-bottom {
      padding: 16px 24px;
      border-top: 1px solid var(--border);
      display: flex;
      gap: 12px;
    }
    .contact-icon {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--bg);
      border: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 16px;
      cursor: pointer;
      transition: var(--transition);
    }
    .contact-icon:hover {
      background: var(--primary);
      color: var(--white);
      border-color: var(--primary);
    }

    /* ===== 移动端顶部导航（≤1200px） ===== */
    .mobile-header {
      display: none;
      position: sticky;
      top: 0;
      z-index: 200;
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border);
    }
    .mobile-header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 56px;
      padding: 0 16px;
    }
    .mobile-logo { display: flex; flex-direction: column; line-height: 1.2; }
    .mobile-logo-main { font-size: 16px; font-weight: 800; color: var(--primary); }
    .mobile-logo-sub { font-size: 10px; color: var(--accent); letter-spacing: 1px; }

    .hamburger-btn {
      width: 40px;
      height: 40px;
      border: none;
      background: transparent;
      font-size: 20px;
      color: var(--text);
      cursor: pointer;
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }
    .hamburger-btn:hover { background: rgba(14,124,123,0.06); color: var(--primary); }

    .mobile-menu {
      display: none;
      position: absolute;
      top: 56px;
      left: 0;
      right: 0;
      background: var(--white);
      box-shadow: var(--shadow-lg);
      max-height: calc(100vh - 56px);
      overflow-y: auto;
      border-top: 1px solid var(--border);
    }
    .mobile-menu.open { display: block; }
    .mobile-nav-item {
      display: flex;
      align-items: center;
      gap: 12px;
      height: 48px;
      padding: 0 16px;
      font-size: 15px;
      color: var(--text);
      transition: var(--transition);
    }
    .mobile-nav-item:hover { background: rgba(14,124,123,0.06); color: var(--primary); }
    .mobile-nav-item.active { background: rgba(14,124,123,0.08); color: var(--primary); font-weight: 600; }
    .mobile-nav-item i { width: 20px; font-size: 15px; color: var(--text-sub); }
    .mobile-nav-item.active i { color: var(--primary); }
    .mobile-menu-conact { display: flex; gap: 12px; padding: 16px; }
    .mobile-contact-btn {
      flex: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      height: 42px;
      border-radius: 10px;
      border: 1px solid var(--border);
      font-size: 14px;
      color: var(--text);
      background: var(--white);
      transition: var(--transition);
    }
    .mobile-contact-btn:hover { border-color: var(--primary); color: var(--primary); }

    /* ===== 主内容区 ===== */
    .main-content { margin-left: 260px; min-height: 100vh; }

    /* 面包屑 */
    .breadcrumb-bar { padding: 16px 0 0; font-size: 14px; color: var(--text-sub); }
    .breadcrumb-bar a { color: var(--text-sub); }
    .breadcrumb-bar a:hover { color: var(--primary); }
    .breadcrumb-sep { margin: 0 8px; color: var(--border); }

    /* 页面头部 */
    .page-hero { padding: 32px 0 40px; }
    .page-eyebrow {
      font-size: 13px;
      color: var(--accent);
      text-transform: uppercase;
      letter-spacing: 3px;
      font-weight: 700;
      display: inline-block;
      margin-bottom: 8px;
    }
    .page-hero h1 { font-size: 36px; font-weight: 700; line-height: 1.3; }
    .page-hero p { font-size: 16px; color: var(--text-sub); max-width: 680px; margin-top: 12px; }

    /* ===== 分类介绍区（图左文右） ===== */
    .section-intro { padding-bottom: 40px; }
    .intro-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: center;
      background: var(--white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .intro-image img { border-radius: var(--radius-lg); height: 260px; width: 100%; object-fit: cover; }
    .intro-text p { color: var(--text-sub); font-size: 15px; line-height: 1.8; margin-bottom: 12px; }
    .intro-text p:last-child { margin-bottom: 0; }

    /* ===== 内容卡区（6张，3×2） ===== */
    .section-cards { padding-bottom: 40px; }
    .section-title {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 28px;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 24px;
    }
    .section-title::before {
      content: "";
      width: 4px;
      height: 24px;
      background: var(--primary);
      border-radius: 2px;
      flex-shrink: 0;
    }

    .cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .guide-card {
      background: var(--white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      position: relative;
      overflow: hidden;
      transition: var(--transition);
    }
    .guide-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 6px;
      background: var(--primary);
      transition: height 0.2s ease;
    }
    .guide-card:nth-child(2)::before,
    .guide-card:nth-child(5)::before { background: var(--accent); }
    .guide-card:nth-child(3)::before,
    .guide-card:nth-child(6)::before { background: #6B7280; }

    .guide-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }
    .guide-card:hover::before { height: 8px; }
    .guide-card:hover .guide-card-icon { transform: scale(1.05); }

    .guide-card-icon {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: rgba(14,124,123,0.10);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      color: var(--primary);
      margin-bottom: 16px;
      transition: var(--transition);
    }
    .guide-card:nth-child(2) .guide-card-icon,
    .guide-card:nth-child(5) .guide-card-icon {
      background: rgba(242,169,59,0.12);
      color: var(--accent);
    }
    .guide-card:nth-child(3) .guide-card-icon,
    .guide-card:nth-child(6) .guide-card-icon {
      background: rgba(107,114,128,0.10);
      color: var(--text-sub);
    }
    .guide-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
    .guide-card p { font-size: 14px; color: var(--text-sub); line-height: 1.7; }

    /* ===== 内链引导区 ===== */
    .section-links { padding-bottom: 40px; }
    .links-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
    .guide-link-card {
      display: flex;
      align-items: center;
      gap: 16px;
      background: var(--white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      padding: 24px;
      transition: var(--transition);
    }
    .guide-link-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-lg);
      transform: translateY(-2px);
    }
    .guide-link-card > i { font-size: 28px; color: var(--primary); flex-shrink: 0; }
    .guide-link-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 4px; }
    .guide-link-card p { font-size: 14px; color: var(--text-sub); line-height: 1.6; }
    .guide-link-card .link-arrow {
      margin-left: auto;
      font-size: 18px;
      color: var(--text-sub);
      transition: var(--transition);
      flex-shrink: 0;
    }
    .guide-link-card:hover .link-arrow { color: var(--primary); transform: translateX(4px); }

    /* ===== FAQ 区（编号方框） ===== */
    .section-faq { padding-bottom: 40px; }
    .faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .faq-item {
      background: var(--white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      padding: 20px 24px;
      transition: var(--transition);
    }
    .faq-item:hover {
      box-shadow: var(--shadow-lg);
      border-color: rgba(14,124,123,0.3);
      transform: translateY(-2px);
    }
    .faq-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 28px;
      height: 28px;
      border-radius: 6px;
      background: var(--primary);
      color: var(--white);
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .faq-item h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
    .faq-item p { font-size: 14px; color: var(--text-sub); line-height: 1.7; }

    /* ===== CTA 区块 ===== */
    .cta-section { padding-bottom: 48px; }
    .cta-block {
      background: var(--primary);
      border-radius: var(--radius-lg);
      padding: 40px 48px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }
    .cta-title { color: var(--white); font-size: 24px; font-weight: 700; line-height: 1.4; }
    .cta-sub { color: rgba(255,255,255,0.8); font-size: 15px; margin-top: 6px; }
    .cta-actions { display: flex; gap: 12px; flex-shrink: 0; }
    .cta-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 48px;
      padding: 0 28px;
      border-radius: var(--radius-md);
      font-size: 16px;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      border: none;
    }
    .cta-btn-primary { background: var(--white); color: var(--primary); }
    .cta-btn-primary:hover { background: var(--bg); color: var(--primary-dark); }
    .cta-btn-outline {
      background: transparent;
      color: var(--white);
      border: 1px solid rgba(255,255,255,0.6);
    }
    .cta-btn-outline:hover {
      background: rgba(255,255,255,0.1);
      color: var(--white);
      border-color: var(--white);
    }

    /* ===== 页脚 ===== */
    .site-footer {
      background: var(--bg);
      border-top: 2px solid var(--border);
      padding: 48px 0 24px;
      margin-left: 260px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 32px;
    }
    .footer-logo { font-size: 20px; font-weight: 800; color: var(--primary); display: block; line-height: 1.3; }
    .footer-logo-sub { font-size: 12px; color: var(--accent); }
    .footer-brand p { font-size: 14px; color: var(--text-sub); margin-top: 12px; line-height: 1.7; }
    .footer-col h4 { font-size: 15px; font-weight: 700; margin-bottom: 16px; }
    .footer-col ul li { margin-bottom: 10px; }
    .footer-col ul li a { font-size: 14px; color: var(--text-sub); }
    .footer-col ul li a:hover { color: var(--primary); }

    .footer-copyright {
      border-top: 1px solid var(--border);
      padding-top: 20px;
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: var(--text-sub);
    }
    .copy-brand { color: var(--text); font-weight: 600; }

    /* ===== 响应式断点 ===== */
    @media (max-width: 1200px) {
      .sidebar-nav { display: none; }
      .mobile-header { display: block; }
      .main-content { margin-left: 0; }
      .site-footer { margin-left: 0; }
    }

    @media (max-width: 1024px) {
      .cards-grid { grid-template-columns: 1fr 1fr; }
      .intro-wrap { grid-template-columns: 1fr; }
      .faq-list { grid-template-columns: 1fr; }
      .cta-block { flex-direction: column; text-align: center; padding: 32px 24px; }
      .cta-actions { width: 100%; justify-content: center; }
    }

    @media (max-width: 768px) {
      .container { padding: 0 16px; }
      .page-hero { padding: 20px 0 28px; }
      .page-hero h1 { font-size: 28px; }
      .section-intro { padding-bottom: 32px; }
      .section-cards { padding-bottom: 32px; }
      .section-links { padding-bottom: 32px; }
      .section-faq { padding-bottom: 32px; }
      .cta-section { padding-bottom: 36px; }
      .section-title { font-size: 24px; }
      .cards-grid { grid-template-columns: 1fr; }
      .links-grid { grid-template-columns: 1fr; }
      .intro-wrap { padding: 20px; }
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
      .cta-actions { flex-direction: column; gap: 12px; }
      .cta-btn { width: 100%; }
    }

    @media (max-width: 520px) {
      body { font-size: 15px; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-copyright { flex-direction: column; text-align: center; }
      .intro-image img { height: 200px; }
      .faq-item { padding: 16px; }
    }