/* roulang page: index */
:root {
  --primary: #0F766E;
  --primary-dark: #0B5E57;
  --accent: #D97706;
  --accent-dark: #B45309;
  --bg: #F8FAF9;
  --surface: #FFFFFF;
  --text: #1F2937;
  --muted: #6B7280;
  --border: #E5E7EB;
  --dark: #111827;
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-input: 6px;
  --shadow-card: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-hover: 0 8px 24px rgba(0,0,0,0.08);
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font-family);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 32px; }
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 240px;
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  background: var(--dark);
  color: #fff;
  display: flex;
  flex-direction: column;
  padding: 28px 20px;
  z-index: 50;
  overflow-y: auto;
}
.sidebar .logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
  padding: 4px 8px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.sidebar .logo i { color: var(--accent); font-size: 22px; }
.sidebar .logo span b { color: var(--accent); }
.sidebar nav { flex: 1; margin-top: 18px; }
.sidebar nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  border-radius: 10px;
  margin-bottom: 8px;
  color: rgba(255,255,255,0.82);
  font-size: 15px;
  font-weight: 500;
  transition: all 0.25s ease;
}
.sidebar nav a i { width: 20px; text-align: center; font-size: 15px; }
.sidebar nav a:hover { background: rgba(15,118,110,0.35); color: #fff; transform: translateX(4px); }
.sidebar nav a.active { background: var(--primary); color: #fff; box-shadow: 0 4px 12px rgba(15,118,110,0.35); }
.sidebar .side-footer { border-top: 1px solid rgba(255,255,255,0.12); padding-top: 18px; margin-top: 16px; }
.sidebar .side-footer .btn-login {
  display: block;
  background: var(--accent);
  color: #fff;
  text-align: center;
  padding: 10px 0;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  transition: background 0.2s;
}
.sidebar .side-footer .btn-login:hover { background: var(--accent-dark); }
.sidebar .side-footer .hotline { text-align: center; margin-top: 14px; color: rgba(255,255,255,0.55); font-size: 13px; }
.sidebar .side-footer .hotline span { display: block; font-size: 15px; color: #fff; font-weight: 600; margin-top: 4px; letter-spacing: 0.03em; }
.sidebar .side-footer .icp { text-align: center; font-size: 12px; color: rgba(255,255,255,0.35); margin-top: 12px; line-height: 1.5; }
.main-content { flex: 1; margin-left: 240px; min-width: 0; }
.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 60;
  height: 56px;
  background: var(--dark);
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}
.mobile-header .m-logo { color: #fff; font-size: 17px; font-weight: 700; }
.mobile-header .m-logo b { color: var(--accent); }
.mobile-header .menu-btn { color: #fff; font-size: 22px; background: none; border: none; cursor: pointer; }
.mobile-drawer {
  position: fixed;
  top: 0;
  left: -280px;
  width: 280px;
  height: 100%;
  background: var(--dark);
  z-index: 100;
  transition: left 0.3s ease;
  padding: 24px 20px;
  overflow-y: auto;
}
.mobile-drawer.open { left: 0; }
.mobile-drawer .close-btn { color: #fff; font-size: 24px; background: none; border: none; cursor: pointer; float: right; }
.mobile-drawer .d-logo { color: #fff; font-size: 20px; font-weight: 700; margin-bottom: 24px; clear: both; }
.mobile-drawer .d-logo b { color: var(--accent); }
.mobile-drawer nav a {
  display: block;
  color: rgba(255,255,255,0.8);
  padding: 12px 14px;
  border-radius: 8px;
  margin-bottom: 6px;
  transition: background 0.2s;
}
.mobile-drawer nav a:hover, .mobile-drawer nav a.active { background: var(--primary); color: #fff; }
.drawer-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 90;
  display: none;
}
.drawer-overlay.show { display: block; }
.countdown-bar {
  background: linear-gradient(90deg, rgba(15,118,110,0.12), rgba(217,119,6,0.12));
  border-bottom: 1px solid rgba(15,118,110,0.2);
  padding: 12px 0;
  text-align: center;
  font-size: 14px;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}
.countdown-bar .lbl { font-weight: 600; color: var(--primary-dark); }
.countdown-bar .cd-num {
  background: var(--primary);
  color: #fff;
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  min-width: 36px;
  display: inline-block;
  text-align: center;
}
.countdown-bar .cd-sep { color: var(--muted); }
.hero {
  position: relative;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  padding: 80px 0 90px;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(248,250,249,0.95) 0%, rgba(248,250,249,0.85) 45%, rgba(248,250,249,0.6) 100%);
}
.hero .container { position: relative; z-index: 2; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.hero h1 { font-size: 40px; font-weight: 700; line-height: 1.25; color: var(--text); margin-bottom: 20px; }
.hero h1 span { color: var(--primary); }
.hero .sub { font-size: 17px; color: var(--muted); margin-bottom: 32px; max-width: 520px; line-height: 1.8; }
.hero .btn-group { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--primary); color: #fff;
  padding: 13px 28px; border-radius: 8px;
  font-weight: 600; font-size: 15px;
  border: 2px solid var(--primary);
  transition: all 0.25s;
  cursor: pointer;
}
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 18px rgba(15,118,110,0.25); }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  background: #fff; color: var(--primary);
  padding: 13px 28px; border-radius: 8px;
  font-weight: 600; font-size: 15px;
  border: 2px solid var(--border);
  transition: all 0.25s;
  cursor: pointer;
}
.btn-secondary:hover { border-color: var(--primary); color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.06); }
.btn-accent {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--accent); color: #fff;
  padding: 14px 32px; border-radius: 8px;
  font-weight: 600; font-size: 16px;
  border: 2px solid var(--accent);
  transition: all 0.25s;
  cursor: pointer;
}
.btn-accent:hover { background: var(--accent-dark); border-color: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(217,119,6,0.3); }
.login-card {
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.08);
  padding: 32px;
  width: 100%;
  max-width: 400px;
  margin-left: auto;
}
.login-card .card-title { font-size: 20px; font-weight: 700; margin-bottom: 4px; }
.login-card .card-sub { font-size: 14px; color: var(--muted); margin-bottom: 22px; }
.login-card label { font-size: 14px; font-weight: 500; color: var(--text); display: block; margin-bottom: 6px; }
.login-card input {
  width: 100%; padding: 12px 14px;
  border: 1px solid var(--border); border-radius: 6px;
  background: #F9FAFB; margin-bottom: 16px;
  transition: border-color 0.2s, box-shadow 0.2s;
  font-size: 14px;
}
.login-card input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(15,118,110,0.15); background: #fff; }
.btn-login-card {
  width: 100%; padding: 13px; border-radius: 8px;
  background: var(--primary); color: #fff;
  border: none; font-size: 16px; font-weight: 600;
  cursor: pointer; transition: background 0.2s;
  display: flex; align-items: center; justify-content: center; gap: 8px;
}
.btn-login-card:hover { background: var(--primary-dark); }
.login-card .safe-tip { text-align: center; font-size: 13px; color: var(--muted); margin-top: 14px; }
.features {
  padding: 80px 0;
  background: #fff;
  border-bottom: 1px solid var(--border);
}
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head .tagline { color: var(--primary); font-weight: 600; font-size: 14px; letter-spacing: 0.04em; text-transform: uppercase; margin-bottom: 8px; }
.section-head h2 { font-size: 30px; font-weight: 700; color: var(--text); line-height: 1.3; }
.section-head p { font-size: 16px; color: var(--muted); margin-top: 12px; }
.feature-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  max-width: 900px;
  margin: 0 auto;
}
.feature-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 24px;
  border-radius: 12px;
  background: var(--bg);
  border: 1px solid transparent;
  transition: all 0.3s ease;
  cursor: default;
}
.feature-item:hover { background: #fff; border-color: rgba(15,118,110,0.2); box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.feature-item .num {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  opacity: 0.25;
  line-height: 1;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}
.feature-item .f-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: rgba(15,118,110,0.1);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
  font-size: 20px;
  flex-shrink: 0;
}
.feature-item h3 { font-size: 17px; font-weight: 600; margin-bottom: 6px; }
.feature-item p { font-size: 14px; color: var(--muted); line-height: 1.7; }
.gallery {
  padding: 80px 0;
  background: var(--bg);
}
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.gallery-item { border-radius: 12px; overflow: hidden; background: #fff; box-shadow: var(--shadow-card); transition: all 0.3s ease; }
.gallery-item:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.gallery-item .img-wrap { aspect-ratio: 3/2; overflow: hidden; position: relative; }
.gallery-item .img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.gallery-item:hover .img-wrap img { transform: scale(1.05); }
.gallery-item .img-wrap::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(0,0,0,0.25));
}
.gallery-item .g-info { padding: 16px 20px 20px; }
.gallery-item h3 { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.gallery-item p { font-size: 13px; color: var(--muted); line-height: 1.6; }
.cta-section {
  background-color: var(--primary);
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  position: relative;
  padding: 70px 0;
}
.cta-section::before { content: ''; position: absolute; inset: 0; background: rgba(15,118,110,0.9); }
.cta-section .container { position: relative; z-index: 2; display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.cta-title { font-size: 28px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.cta-desc { color: rgba(255,255,255,0.75); font-size: 15px; margin-bottom: 24px; line-height: 1.8; }
.cta-form-card {
  background: #fff; border-radius: 14px; padding: 28px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.2);
}
.cta-form-card .f-title { font-size: 18px; font-weight: 700; margin-bottom: 6px; color: var(--text); }
.cta-form-card .f-sub { font-size: 14px; color: var(--muted); margin-bottom: 18px; }
.cta-form-card input {
  width: 100%; padding: 11px 14px;
  border: 1px solid var(--border); border-radius: 6px;
  background: #F9FAFB; margin-bottom: 12px; font-size: 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.cta-form-card input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(217,119,6,0.12); background: #fff; }
.submit-btn {
  width: 100%; padding: 13px; border-radius: 8px;
  background: var(--accent); color: #fff;
  border: none; font-size: 16px; font-weight: 600;
  cursor: pointer; transition: background 0.2s;
  display: flex; align-items: center; justify-content: center; gap: 8px;
}
.submit-btn:hover { background: var(--accent-dark); }
.faq-section { padding: 80px 0; background: #fff; }
.faq-wrap { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 12px;
  background: #fff;
  transition: border-color 0.2s, box-shadow 0.2s;
  overflow: hidden;
}
.faq-item.open { border-color: rgba(15,118,110,0.35); box-shadow: var(--shadow-card); }
.faq-q {
  display: flex; align-items: center; gap: 12px;
  padding: 18px 22px;
  cursor: pointer;
  user-select: none;
}
.faq-q .q-icon {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
  flex-shrink: 0;
}
.faq-q .q-text { font-size: 16px; font-weight: 600; color: var(--text); flex: 1; }
.faq-q .q-toggle {
  width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; color: var(--muted);
  transition: transform 0.3s ease;
}

.faq-item.open .q-toggle { transform: rotate(45deg); color: var(--accent); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.3s ease; padding: 0 22px; }
.faq-item.open .faq-a { max-height: 300px; padding: 0 22px 20px 62px; }
.faq-a p { font-size: 15px; color: var(--muted); line-height: 1.8; }
.news-section { padding: 80px 0; background: var(--bg); }
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.news-card {
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.news-card .news-img { aspect-ratio: 16/9; overflow: hidden; position: relative; }
.news-card .news-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.news-card:hover .news-img img { transform: scale(1.05); }
.news-card .news-img .badge {
  position: absolute; top: 12px; left: 12px;
  background: var(--primary); color: #fff;
  font-size: 12px; font-weight: 600;
  padding: 4px 12px; border-radius: 20px;
  z-index: 2;
}
.news-card .news-body { padding: 18px 20px 20px; display: flex; flex-direction: column; flex: 1; }
.news-card h3 { font-size: 16px; font-weight: 600; line-height: 1.5; margin-bottom: 8px; color: var(--text); transition: color 0.2s; }
.news-card:hover h3 { color: var(--primary); }
.news-card .news-excerpt {
  font-size: 14px; color: var(--muted); line-height: 1.7;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  margin-bottom: 14px;
}
.news-card .news-meta {
  margin-top: auto;
  display: flex; align-items: center; justify-content: space-between;
  font-size: 13px; color: var(--muted);
  border-top: 1px solid var(--border);
  padding-top: 12px;
}
.news-card .news-meta a { color: var(--primary); font-weight: 500; display: flex; align-items: center; gap: 4px; }
.news-card .news-meta a:hover { color: var(--primary-dark); }
.empty-tip {
  text-align: center; padding: 48px 20px;
  color: var(--muted); font-size: 16px;
  background: #fff; border-radius: 12px;
  border: 2px dashed var(--border);
  grid-column: 1 / -1;
}
.site-footer { background: var(--dark); color: rgba(255,255,255,0.65); padding: 56px 0 24px; }
.site-footer .footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.site-footer h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 16px; }
.site-footer .f-brand { font-size: 22px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.site-footer .f-brand b { color: var(--accent); }
.site-footer .f-desc { font-size: 14px; line-height: 1.8; }
.site-footer ul { list-style: none; }
.site-footer ul li { margin-bottom: 10px; }
.site-footer ul li a { font-size: 14px; transition: color 0.2s; color: rgba(255,255,255,0.65); }
.site-footer ul li a:hover { color: var(--accent); }
.site-footer .f-contact p { font-size: 14px; margin-bottom: 6px; display: flex; align-items: center; gap: 8px; }
.site-footer .f-contact i { width: 16px; color: var(--accent); }
.f-copyright { text-align: center; font-size: 13px; padding-top: 24px; color: rgba(255,255,255,0.4); }
@media (max-width: 1024px) {
  .container { padding: 0 24px; }
  .hero { padding: 60px 0; }
  .hero .container { grid-template-columns: 1fr; }
  .login-card { margin: 0 auto; }
  .feature-row { grid-template-columns: 1fr; max-width: 620px; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-section .container { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .site-footer .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .sidebar { display: none; }
  .main-content { margin-left: 0; }
  .mobile-header { display: flex; }
  .container { padding: 0 20px; }
  .hero h1 { font-size: 30px; }
  .countdown-bar { font-size: 13px; gap: 6px; }
  .cd-num { min-width: 28px; padding: 1px 6px; font-size: 13px; }
  .section-head h2 { font-size: 24px; }
  .section-head p { font-size: 15px; }
  .gallery-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .hero { padding: 48px 0; }
  .hero .btn-group { flex-direction: column; }
  .hero .btn-group a { width: 100%; justify-content: center; }
  .site-footer .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .cta-section { padding: 48px 0; }
  .faq-q { padding: 14px 16px; }
  .faq-item.open .faq-a { padding: 0 16px 16px 52px; }
}
@media (max-width: 520px) {
  .hero h1 { font-size: 26px; }
  .feature-item { flex-direction: column; }
  .countdown-bar { flex-direction: column; gap: 4px; padding: 10px 0; }
  .gallery-item .g-info { padding: 12px 16px 16px; }
  .cta-form-card { padding: 20px; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
}

/* roulang page: category1 */
:root {
  --primary: #0F766E;
  --primary-dark: #0B5E57;
  --accent: #D97706;
  --accent-dark: #B45309;
  --bg: #F8FAF9;
  --surface: #FFFFFF;
  --text: #1F2937;
  --muted: #6B7280;
  --border: #E5E7EB;
  --dark: #111827;
  --radius: 12px;
  --radius-btn: 8px;
  --shadow: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-hover: 0 8px 24px rgba(0,0,0,0.08);
}
* { 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);
  line-height: 1.75;
  font-size: 16px;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color .2s, background .2s, transform .2s, box-shadow .2s; }
button { font-family: inherit; cursor: pointer; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* Layout: left sidebar + main content */
.site-shell { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  position: fixed;
  top: 0;
  bottom: 0;
  z-index: 50;
  display: flex;
  flex-direction: column;
  padding: 28px 20px 20px;
}
.sidebar .logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 8px 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}
.logo-icon {
  width: 42px; height: 42px;
  background: var(--primary);
  color: #fff;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 800;
  letter-spacing: -0.5px;
}
.logo-text { font-size: 17px; font-weight: 700; color: var(--text); line-height: 1.3; }
.logo-text span { color: var(--primary); }
.nav-links { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.nav-links a {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 14px;
  border-radius: 8px;
  color: #4B5563;
  font-size: 15px;
  font-weight: 500;
  transition: all .2s;
}
.nav-links a i { width: 18px; text-align: center; font-size: 15px; }
.nav-links a:hover { background: #ECFDF5; color: var(--primary); }
.nav-links a.active { background: var(--primary); color: #fff; font-weight: 600; }
.sidebar-bottom { border-top: 1px solid var(--border); padding-top: 16px; }
.sidebar-bottom a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; border-radius: 8px;
  color: var(--text); font-size: 14px; font-weight: 500;
  background: #F0FDF4; margin-bottom: 8px;
}
.sidebar-bottom a i { color: var(--primary); }
.sidebar-bottom .hotline { font-size: 13px; color: var(--muted); padding: 6px 14px 0; }
.sidebar-bottom .hotline i { color: var(--primary); margin-right: 6px; }
.main-content { flex: 1; margin-left: 240px; min-width: 0; }

/* Mobile header */
.mobile-header {
  display: none;
  position: sticky; top: 0; z-index: 60;
  height: 56px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.mobile-header .logo-mobile {
  display: flex; align-items: center; gap: 8px;
  font-size: 16px; font-weight: 700; color: var(--text);
}
.mobile-header .logo-mobile b {
  background: var(--primary); color: #fff;
  border-radius: 6px; padding: 2px 6px; font-size: 14px;
}
.menu-btn { background: none; border: none; font-size: 22px; color: var(--text); padding: 6px; }
.mobile-login-btn {
  background: var(--primary); color: #fff;
  border: none; border-radius: 6px;
  padding: 6px 14px; font-size: 14px;
}
.mobile-drawer {
  display: none;
  position: fixed; inset: 0; z-index: 70;
}
.mobile-drawer.open { display: block; }
.drawer-mask {
  position: absolute; inset: 0;
  background: rgba(0,0,0,0.4);
}
.drawer-panel {
  position: absolute; top: 0; right: 0;
  width: 280px; bottom: 0;
  background: var(--surface);
  padding: 24px 20px;
  display: flex; flex-direction: column;
  box-shadow: -8px 0 24px rgba(0,0,0,0.08);
}
.drawer-panel .drawer-header {
  display: flex; justify-content: space-between; align-items: center;
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px; margin-bottom: 16px;
}
.drawer-panel a.drawer-link {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 10px; border-radius: 8px;
  color: #4B5563; font-size: 15px;
}
.drawer-panel a.drawer-link:hover { background: #ECFDF5; color: var(--primary); }
.drawer-panel a.drawer-link.active { background: var(--primary); color: #fff; }

/* Page hero */
.page-hero {
  background: linear-gradient(135deg, #0F766E 0%, #0B5E57 45%, #115E59 100%);
  color: #fff;
  padding: 72px 0 64px;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -60%; right: -10%;
  width: 500px; height: 500px;
  background: rgba(255,255,255,0.06);
  border-radius: 50%;
}
.page-hero::after {
  content: '';
  position: absolute;
  bottom: -80%; left: 10%;
  width: 400px; height: 400px;
  background: rgba(217,119,6,0.15);
  border-radius: 50%;
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero .breadcrumb {
  font-size: 14px; color: rgba(255,255,255,0.8);
  margin-bottom: 16px; display: flex; align-items: center; gap: 8px;
}
.page-hero .breadcrumb a:hover { color: #FCD34D; }
.page-hero h1 {
  font-size: 38px; font-weight: 800;
  line-height: 1.3;
  margin-bottom: 14px;
}
.page-hero .hero-desc {
  font-size: 17px; color: rgba(255,255,255,0.9);
  max-width: 640px; line-height: 1.8;
}

/* Section base */
.section { padding: 72px 0; }
.section-alt { background: var(--surface); }
.section-head { margin-bottom: 40px; }
.section-head .kicker {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; font-weight: 600;
  color: var(--primary);
  background: #ECFDF5;
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 12px;
}
.section-head h2 {
  font-size: 30px; font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}
.section-head p { color: var(--muted); margin-top: 8px; max-width: 680px; }

/* Steps */
.steps-wrap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.step-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 22px;
  position: relative;
  transition: all .25s;
}
.step-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-color: #99F6E4;
}
.step-num {
  width: 40px; height: 40px;
  background: var(--primary);
  color: #fff;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 700;
  margin-bottom: 18px;
  font-variant-numeric: tabular-nums;
}
.step-item h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.step-item p { font-size: 14px; color: var(--muted); line-height: 1.7; }

/* Feature / alternate rows */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  margin-bottom: 80px;
}
.feature-row:last-child { margin-bottom: 0; }
.feature-row.reverse .feature-img { order: 2; }
.feature-row.reverse .feature-info { order: 1; }
.feature-img { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.feature-img img { width: 100%; aspect-ratio: 4/3; object-fit: cover; transition: transform .4s; }
.feature-img:hover img { transform: scale(1.03); }
.feature-info .f-tag {
  display: inline-flex; align-items: center; gap: 6px;
  background: #FFF7ED; color: var(--accent);
  font-size: 14px; font-weight: 600;
  padding: 4px 12px; border-radius: 999px; margin-bottom: 16px;
}
.feature-info h3 { font-size: 24px; font-weight: 700; margin-bottom: 14px; line-height: 1.35; }
.feature-info p { color: var(--muted); margin-bottom: 16px; line-height: 1.8; }
.feature-info ul { list-style: none; margin-top: 8px; }
.feature-info ul li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 10px;
  color: var(--text);
  font-size: 15px;
}
.feature-info ul li::before {
  content: '\f00c';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute; left: 0; top: 2px;
  color: var(--primary);
  font-size: 14px;
}

/* Method cards (not 3-column template — horizontal layout) */
.method-list { display: flex; flex-direction: column; gap: 20px; }
.method-item {
  display: flex; align-items: center; gap: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all .25s;
}
.method-item:hover { box-shadow: var(--shadow-hover); border-color: #99F6E4; transform: translateX(6px); }
.method-icon {
  width: 56px; height: 56px; flex-shrink: 0;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
}
.method-icon.green { background: #ECFDF5; color: var(--primary); }
.method-icon.orange { background: #FFF7ED; color: var(--accent); }
.method-icon.teal { background: #CCFBF1; color: #0F766E; }
.method-info { flex: 1; }
.method-info h4 { font-size: 17px; font-weight: 600; margin-bottom: 4px; }
.method-info p { font-size: 14px; color: var(--muted); line-height: 1.6; }

/* FAQ */
.faq-wrap { max-width: 860px; margin: 0 auto; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: box-shadow .2s;
}
.faq-item.active { box-shadow: var(--shadow); border-color: #99F6E4; }
.faq-q {
  display: flex; align-items: center; gap: 14px;
  padding: 18px 22px;
  cursor: pointer;
  font-size: 16px; font-weight: 600;
  color: var(--text);
  user-select: none;
}
.faq-q .q-icon {
  width: 28px; height: 28px; flex-shrink: 0;
  background: var(--primary); color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700;
}
.faq-q .q-toggle {
  margin-left: auto;
  font-size: 20px; color: var(--muted);
  transition: transform .25s;
  font-weight: 300;
}
.faq-item.active .q-toggle { transform: rotate(45deg); color: var(--accent); }
.faq-a {
  max-height: 0; overflow: hidden;
  transition: max-height .3s ease, padding .3s ease;
  padding: 0 22px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}
.faq-item.active .faq-a { max-height: 300px; padding: 0 22px 20px; }

/* CTA */
.cta-section {
  background: var(--primary);
  border-radius: 20px;
  padding: 56px 48px;
  position: relative;
  overflow: hidden;
  color: #fff;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -60%; right: -10%;
  width: 400px; height: 400px;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
}
.cta-section h2 { font-size: 32px; font-weight: 800; margin-bottom: 12px; position: relative; z-index: 2; }
.cta-section p { color: rgba(255,255,255,0.85); font-size: 16px; max-width: 560px; margin-bottom: 28px; position: relative; z-index: 2; }
.cta-actions { display: flex; gap: 16px; flex-wrap: wrap; position: relative; z-index: 2; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  font-size: 16px; font-weight: 600;
  border: none;
  transition: all .2s;
}
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 6px 18px rgba(217,119,6,0.35); }
.btn-white { background: #fff; color: var(--primary); }
.btn-white:hover { background: #F0FDF4; transform: translateY(-2px); }
.btn-outline-white { background: transparent; border: 1.5px solid rgba(255,255,255,0.7); color: #fff; }
.btn-outline-white:hover { background: rgba(255,255,255,0.12); border-color: #fff; }

/* Footer (shared) */
.site-footer {
  background: var(--dark);
  color: #9CA3AF;
  padding: 56px 0 28px;
  margin-top: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.f-brand { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 14px; }
.f-brand b {
  background: var(--primary); color: #fff;
  border-radius: 6px; padding: 2px 8px; font-size: 16px;
}
.f-desc { font-size: 14px; line-height: 1.9; color: #9CA3AF; max-width: 300px; }
.site-footer h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 18px; }
.site-footer ul { list-style: none; }
.site-footer ul li { margin-bottom: 10px; }
.site-footer ul li a { color: #9CA3AF; font-size: 14px; transition: color .2s; }
.site-footer ul li a:hover { color: #34D399; }
.site-footer ul li a i { margin-right: 6px; font-size: 12px; color: #6B7280; }
.f-contact p { font-size: 14px; color: #9CA3AF; margin-bottom: 10px; }
.f-contact p i { color: var(--primary); margin-right: 8px; width: 16px; }
.f-copyright {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: #6B7280;
}

/* Responsive */
@media (max-width: 1024px) {
  .sidebar { display: none; }
  .mobile-header { display: flex; }
  .main-content { margin-left: 0; }
  .steps-wrap { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .section { padding: 56px 0; }
  .page-hero { padding: 48px 0 40px; }
  .page-hero h1 { font-size: 30px; }
  .feature-row { grid-template-columns: 1fr; gap: 32px; }
  .feature-row.reverse .feature-img { order: 1; }
  .feature-row.reverse .feature-info { order: 2; }
  .feature-img img { aspect-ratio: 16/10; }
  .cta-section { padding: 36px 24px; border-radius: 16px; }
  .cta-section h2 { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 520px) {
  .steps-wrap { grid-template-columns: 1fr; }
  .method-item { flex-direction: column; text-align: center; padding: 20px 16px; }
  .method-icon { margin-bottom: 4px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .btn { width: 100%; justify-content: center; }
  .cta-actions { flex-direction: column; }
}

/* roulang page: article */
:root {
  --primary: #0F766E;
  --primary-dark: #0B5E57;
  --accent: #D97706;
  --accent-dark: #B45309;
  --bg: #F8FAF9;
  --surface: #FFFFFF;
  --text: #1F2937;
  --muted: #6B7280;
  --border: #E5E7EB;
  --dark: #111827;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.08);
}
* {
  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;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
}
button {
  cursor: pointer;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}
.container-narrow {
  max-width: 800px;
}

/* ===== 左侧导航 ===== */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: 240px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
}
.sidebar-logo {
  padding: 24px 20px 20px;
  border-bottom: 1px solid var(--border);
}
.sidebar-logo a {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  line-height: 1.3;
}
.sidebar-logo b {
  color: var(--primary);
  font-size: 24px;
  margin-right: 4px;
}
.sidebar-logo .logo-dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  display: inline-block;
  margin-left: 6px;
}
.sidebar-nav {
  padding: 20px 12px;
  flex: 1;
  overflow-y: auto;
}
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 14px;
  border-radius: 8px;
  color: #374151;
  font-size: 15px;
  font-weight: 500;
  transition: background 0.2s, color 0.2s;
  margin-bottom: 4px;
}
.sidebar-nav a i {
  width: 20px;
  text-align: center;
  color: var(--muted);
  font-size: 15px;
  transition: color 0.2s;
}
.sidebar-nav a:hover {
  background: #ECFDF5;
  color: var(--primary);
}
.sidebar-nav a:hover i {
  color: var(--primary);
}
.sidebar-nav a.active {
  background: var(--primary);
  color: #fff;
}
.sidebar-nav a.active i {
  color: #fff;
}
.sidebar-bottom {
  padding: 16px;
  border-top: 1px solid var(--border);
}
.sidebar-bottom .btn {
  width: 100%;
  justify-content: center;
}
.sidebar-contact {
  margin-top: 14px;
  font-size: 13px;
  color: var(--muted);
}
.sidebar-contact p {
  margin-bottom: 6px;
  font-variant-numeric: tabular-nums;
}
.sidebar-contact i {
  margin-right: 8px;
  color: var(--primary);
  width: 16px;
}

/* ===== 移动端导航 ===== */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  z-index: 200;
  align-items: center;
  padding: 0 14px;
  justify-content: space-between;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.mobile-toggle {
  background: none;
  border: none;
  font-size: 20px;
  color: var(--text);
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.mobile-logo {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 2px;
}
.mobile-logo b {
  color: var(--primary);
  font-size: 18px;
}
.mobile-login {
  font-size: 13px;
  color: var(--primary);
  font-weight: 600;
  border: 1px solid var(--primary);
  padding: 5px 12px;
  border-radius: 6px;
  background: #fff;
}
.mobile-login:hover {
  background: #ECFDF5;
}
.mobile-menu {
  display: none;
  position: fixed;
  top: 56px;
  left: 0;
  right: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 12px;
  z-index: 199;
  box-shadow: 0 12px 24px rgba(0,0,0,0.08);
}
.mobile-menu.open {
  display: block;
}
.mobile-menu a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px;
  border-radius: 8px;
  color: var(--text);
  font-weight: 500;
  font-size: 15px;
}
.mobile-menu a:hover {
  background: #ECFDF5;
  color: var(--primary);
}
.mobile-menu a i {
  width: 20px;
  text-align: center;
  color: var(--muted);
}

/* ===== 主内容 ===== */
.main-wrap {
  margin-left: 240px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 22px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: all 0.2s;
  cursor: pointer;
  line-height: 1.4;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(15,118,110,0.25);
}
.btn-accent {
  background: var(--accent);
  color: #fff;
}
.btn-accent:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(217,119,6,0.25);
}
.btn-outline-light {
  background: transparent;
  border-color: rgba(255,255,255,0.5);
  color: #fff;
}
.btn-outline-light:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.12);
}

/* ===== 文章 Hero ===== */
.article-hero-section {
  padding: 48px 0 32px;
  background: linear-gradient(180deg, #EDFDFA 0%, #F8FAF9 100%);
  border-bottom: 1px solid var(--border);
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--muted);
  transition: color 0.2s;
}
.breadcrumb a:hover {
  color: var(--primary);
}
.breadcrumb .sep {
  color: #D1D5DB;
}
.breadcrumb .current {
  color: var(--text);
  font-weight: 500;
}
.article-title-wrap {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}
.article-title-wrap h1 {
  font-size: 36px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 18px;
}
.article-meta {
  display: flex;
  justify-content: center;
  gap: 24px;
  font-size: 14px;
  color: var(--muted);
  flex-wrap: wrap;
}
.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.article-meta i {
  color: var(--primary);
}

/* ===== 正文区 ===== */
.article-body-section {
  padding: 40px 0 24px;
}
.article-card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 48px;
}
.article-content {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
}
.article-content > *:first-child {
  margin-top: 0;
}
.article-content h2 {
  font-size: 26px;
  font-weight: 700;
  margin: 36px 0 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid #ECFDF5;
  color: var(--text);
}
.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 28px 0 12px;
  color: var(--text);
}
.article-content p {
  margin-bottom: 18px;
}
.article-content img {
  max-width: 100%;
  border-radius: 12px;
  margin: 24px 0;
}
.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: #F0FDFA;
  padding: 16px 22px;
  border-radius: 0 8px 8px 0;
  margin: 22px 0;
  color: #374151;
  font-style: normal;
}
.article-content ul,
.article-content ol {
  margin: 18px 0 22px;
  padding-left: 24px;
}
.article-content li {
  margin-bottom: 8px;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 22px 0;
}
.article-content th,
.article-content td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}
.article-content th {
  background: #F9FAFB;
  font-weight: 600;
}
.article-content pre {
  background: #111827;
  color: #E5E7EB;
  padding: 18px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 22px 0;
}
.article-content code {
  background: #F3F4F6;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
}
.article-content pre code {
  background: none;
  color: inherit;
  padding: 0;
}
.article-content a {
  color: var(--primary);
  text-decoration: underline;
  transition: color 0.2s;
}
.article-content a:hover {
  color: var(--primary-dark);
}

/* ===== 空状态 ===== */
.article-empty {
  text-align: center;
  padding: 80px 20px;
}
.empty-icon {
  font-size: 52px;
  color: #D1D5DB;
  margin-bottom: 20px;
}
.article-empty h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}
.article-empty p {
  color: var(--muted);
  margin-bottom: 24px;
}
.article-empty .btn {
  display: inline-flex;
}

/* ===== 上一篇/下一篇 ===== */
.article-pagination-section {
  padding: 8px 0 48px;
}
.pagination-box {
  display: flex;
  justify-content: space-between;
  gap: 16px;
}
.prev-post,
.next-post {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: all 0.25s;
}
.prev-post:hover,
.next-post:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}
.page-label {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.page-label i {
  color: var(--primary);
}
.page-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}
.next-post {
  text-align: right;
}
.next-post .page-label {
  justify-content: flex-end;
}

/* ===== 相关阅读 ===== */
.related-section {
  padding: 56px 0;
  background: #F0FDFA;
  border-top: 1px solid var(--border);
}
.section-head {
  margin-bottom: 32px;
}
.section-head h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
}
.section-head p {
  color: var(--muted);
  margin-top: 6px;
  font-size: 15px;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.25s;
  display: block;
  box-shadow: var(--shadow);
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.related-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}
.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.related-card:hover .related-thumb img {
  transform: scale(1.05);
}
.tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(15,118,110,0.92);
  color: #fff;
  font-size: 12px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 4px;
  letter-spacing: 0.3px;
}
.related-body {
  padding: 18px 20px 20px;
}
.related-body h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
  transition: color 0.2s;
}
.related-card:hover .related-body h3 {
  color: var(--primary);
}
.related-body p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== CTA ===== */
.cta-section {
  padding: 64px 0;
}
.cta-box {
  background: var(--primary);
  border-radius: 16px;
  padding: 44px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  box-shadow: 0 8px 24px rgba(15,118,110,0.2);
}
.cta-left h2 {
  color: #fff;
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 8px;
}
.cta-left p {
  color: rgba(255,255,255,0.82);
  font-size: 15px;
}
.cta-right {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--dark);
  color: #9CA3AF;
  padding: 60px 0 0;
  font-size: 14px;
  line-height: 1.7;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
}
.f-brand {
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.f-brand b {
  color: #34D399;
  font-weight: 800;
}
.f-desc {
  color: #9CA3AF;
  font-size: 14px;
  line-height: 1.75;
}
.site-footer h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
}
.site-footer ul {
  list-style: none;
  padding: 0;
}
.site-footer ul li {
  margin-bottom: 10px;
}
.site-footer ul a {
  color: #9CA3AF;
  transition: color 0.2s, padding-left 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.site-footer ul a i {
  color: #34D399;
  font-size: 12px;
}
.site-footer ul a:hover {
  color: #fff;
  padding-left: 2px;
}
.f-contact p {
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.f-contact i {
  color: #34D399;
  width: 16px;
}
.f-copyright {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 22px 0;
  text-align: center;
  color: #6B7280;
  font-size: 13px;
}
.f-copyright p {
  margin: 0;
}

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .sidebar {
    display: none;
  }
  .main-wrap {
    margin-left: 0;
  }
  .mobile-header {
    display: flex;
  }
  .mobile-menu.open {
    display: block;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .article-title-wrap h1 {
    font-size: 32px;
  }
}
@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }
  .article-hero-section {
    padding: 36px 0 24px;
  }
  .article-title-wrap h1 {
    font-size: 28px;
  }
  .article-card {
    padding: 28px 22px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .pagination-box {
    flex-direction: column;
  }
  .next-post {
    text-align: left;
  }
  .next-post .page-label {
    justify-content: flex-start;
  }
  .cta-box {
    flex-direction: column;
    text-align: center;
    padding: 32px 24px;
  }
  .cta-right {
    flex-direction: column;
    width: 100%;
  }
  .cta-right .btn {
    width: 100%;
  }
  .article-meta {
    flex-direction: row;
    gap: 12px;
    flex-wrap: wrap;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .article-title-wrap h1 {
    font-size: 24px;
  }
  .article-card {
    padding: 20px 16px;
  }
  .article-meta {
    gap: 8px;
    font-size: 13px;
  }
  .breadcrumb {
    font-size: 13px;
  }
  .cta-box {
    padding: 28px 18px;
  }
  .cta-left h2 {
    font-size: 22px;
  }
}

/* roulang page: category2 */
:root {
  --primary: #0F766E;
  --primary-dark: #0B5E57;
  --accent: #D97706;
  --accent-dark: #B45309;
  --bg: #F8FAF9;
  --surface: #FFFFFF;
  --text: #1F2937;
  --muted: #6B7280;
  --border: #E5E7EB;
  --dark: #111827;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 72px 0; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 8px;
  font-weight: 600;
  padding: 12px 26px;
  border: 1px solid transparent;
  transition: background .3s, box-shadow .3s, transform .3s, border-color .3s;
  font-size: 15px;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(15, 118, 110, .2); }
.btn-outline { background: #fff; border-color: var(--border); color: var(--primary); }
.btn-outline:hover { border-color: var(--primary); background: #F0FDFA; transform: translateY(-2px); }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(217, 119, 6, .2); }
.btn-white { background: #fff; color: var(--primary); }
.btn-white:hover { background: #F0FDFA; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(255, 255, 255, .25); }

/* 左侧竖向导航 */
.app-shell { display: flex; min-height: 100vh; }
.site-sidebar {
  width: 240px;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 28px 18px 20px;
  z-index: 50;
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 6px 22px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 22px;
}
.brand-icon {
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: #fff;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}
.brand-text { font-size: 17px; color: var(--text); letter-spacing: .5px; line-height: 1.3; white-space: nowrap; }
.sidebar-nav { display: flex; flex-direction: column; gap: 6px; }
.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: 8px;
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  transition: background .25s, color .25s, transform .25s;
}
.nav-item i { width: 20px; text-align: center; font-size: 15px; color: var(--muted); transition: color .25s; }
.nav-item:hover { background: #F0FDFA; color: var(--primary); transform: translateX(2px); }
.nav-item:hover i { color: var(--primary); }
.nav-item.active { background: var(--primary); color: #fff; }
.nav-item.active i { color: #fff; }

.sidebar-footer { margin-top: auto; padding-top: 20px; border-top: 1px solid var(--border); }
.sidebar-login {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  padding: 10px 0;
  font-weight: 600;
  font-size: 14px;
  transition: background .3s, transform .3s;
}
.sidebar-login:hover { background: var(--accent-dark); transform: translateY(-1px); }
.sidebar-contact { margin-top: 18px; display: grid; gap: 6px; font-size: 13px; color: var(--muted); }
.sidebar-contact i { width: 18px; color: var(--primary); }
.sidebar-beian { font-size: 12px; color: #9CA3AF; margin-top: 10px; }

/* 移动端顶部导航 */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  z-index: 100;
}
.menu-toggle {
  background: none;
  border: none;
  font-size: 22px;
  color: var(--text);
  padding: 8px;
  border-radius: 8px;
  transition: background .25s;
}
.menu-toggle:hover { background: #F3F4F6; }
.mobile-brand { font-size: 17px; color: var(--text); letter-spacing: .5px; }
.mobile-brand b { color: var(--primary); }
.mobile-login {
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
}
.mobile-drawer {
  display: none;
  position: fixed;
  top: 56px;
  left: 0;
  right: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  z-index: 99;
  padding: 16px;
}
.mobile-drawer.open { display: block; }
.mobile-drawer .sidebar-nav { gap: 4px; }
.mobile-drawer .nav-item { padding: 12px 14px; }

/* 主内容区 */
.site-main { margin-left: 240px; flex: 1; min-width: 0; display: flex; flex-direction: column; }

/* Hero */
.page-hero {
  background:
    linear-gradient(100deg, rgba(17, 24, 39, 0.94) 0%, rgba(17, 24, 39, 0.78) 45%, rgba(15, 118, 110, 0.72) 100%),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff;
  padding: 72px 0 80px;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 48px;
  align-items: center;
}
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 14px;
  color: #CCFBF1;
  margin-bottom: 22px;
}
.hero-copy h1 {
  font-size: 40px;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 18px;
}
.hero-copy h1 .hero-highlight { color: #FCD34D; }
.hero-copy p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.85);
  max-width: 520px;
  margin-bottom: 30px;
  line-height: 1.8;
}
.hero-buttons { display: flex; flex-wrap: wrap; gap: 14px; }

.hero-panel { display: flex; justify-content: flex-end; }
.security-status-card {
  background: var(--surface);
  color: var(--text);
  border-radius: 14px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
  width: 100%;
  max-width: 340px;
  padding: 24px;
}
.status-head {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  color: var(--primary);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}
.status-head i { font-size: 20px; }
.status-list { list-style: none; display: grid; gap: 12px; margin-bottom: 18px; }
.status-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text);
  padding: 8px 10px;
  background: #F8FAF9;
  border-radius: 8px;
  border-left: 3px solid var(--primary);
}
.status-list li i { color: var(--primary); width: 18px; text-align: center; }
.status-link {
  display: block;
  text-align: center;
  font-size: 14px;
  color: var(--primary);
  font-weight: 600;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  transition: color .25s;
}
.status-link:hover { color: var(--accent); }

/* 能力总览 */
.feat-band { background: var(--surface); border-bottom: 1px solid var(--border); padding: 56px 0; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 44px; }
.section-head .kicker {
  color: var(--primary);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  display: inline-block;
  margin-bottom: 10px;
}
.section-head h2 { font-size: 30px; font-weight: 700; color: var(--text); margin-bottom: 12px; }
.section-head p { color: var(--muted); font-size: 16px; }
.feat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.feat-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  transition: box-shadow .3s, transform .3s, border-color .3s;
}
.feat-item:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: #D1D5DB; }
.feat-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: #D1FAE5;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 16px;
}
.feat-num { font-size: 12px; font-weight: 700; color: var(--accent); letter-spacing: 1px; margin-bottom: 6px; }
.feat-item h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.feat-item p { font-size: 14px; color: var(--muted); line-height: 1.7; }

/* 交错图文 */
.split-blocks { background: var(--bg); }
.split-block { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; margin-bottom: 64px; }
.split-block:last-child { margin-bottom: 0; }
.split-block.reverse .split-media { order: 2; }
.split-copy .kicker { color: var(--primary); font-size: 13px; font-weight: 700; letter-spacing: 2px; display: inline-block; margin-bottom: 10px; }
.split-copy h3 { font-size: 26px; font-weight: 700; margin-bottom: 14px; color: var(--text); }
.split-copy p { color: var(--muted); font-size: 15px; line-height: 1.8; margin-bottom: 20px; }
.feature-list { list-style: none; display: grid; gap: 10px; }
.feature-list li { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; color: var(--text); }
.feature-list li i { color: var(--primary); margin-top: 5px; }
.feature-list li b { font-weight: 600; }
.split-media { position: relative; border-radius: 14px; overflow: hidden; box-shadow: var(--shadow-lg); }
.split-media img { width: 100%; height: 280px; object-fit: cover; }
.split-media::after { content: ""; position: absolute; inset: 0; border: 1px solid rgba(255, 255, 255, 0.35); border-radius: 14px; pointer-events: none; }

/* 场景案例 */
.scenario-section { background: var(--surface); }
.scenario-list { display: grid; gap: 16px; max-width: 960px; margin: 0 auto; }
.scenario-item {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  transition: box-shadow .3s, transform .3s;
}
.scenario-item:hover { box-shadow: var(--shadow-lg); transform: translateX(4px); }
.scenario-icon {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  background: var(--primary);
  color: #fff;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}
.scenario-content { flex: 1; min-width: 0; }
.scenario-content h3 { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.scenario-content p { font-size: 14px; color: var(--muted); line-height: 1.65; }
.scenario-tags { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; flex-shrink: 0; max-width: 240px; }
.scenario-tags span {
  background: #D1FAE5;
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  white-space: nowrap;
}

/* 流程时间线 */
.process-section { background: var(--bg); }
.timeline {
  max-width: 880px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.timeline::before {
  content: "";
  position: absolute;
  top: 28px;
  left: 12.5%;
  right: 12.5%;
  height: 2px;
  background: #CCFBF1;
  z-index: 0;
}
.step-item { position: relative; z-index: 1; text-align: center; padding: 0 10px; }
.step-dot {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  box-shadow: 0 0 0 6px #F0FDFA, 0 6px 18px rgba(15, 118, 110, 0.25);
}
.step-item h3 { font-size: 16px; font-weight: 700; margin-bottom: 6px; color: var(--text); }
.step-item p { font-size: 13px; color: var(--muted); line-height: 1.6; }

/* 合规保障 */
.compliance-section { background: var(--surface); border-top: 1px solid var(--border); }
.compliance-list { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; max-width: 1000px; margin: 0 auto; }
.compliance-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 10px 22px;
  font-size: 15px;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: border-color .3s, box-shadow .3s;
}
.compliance-item i { color: var(--primary); }
.compliance-item:hover { border-color: var(--primary); box-shadow: var(--shadow); }

/* FAQ 手风琴 */
.faq-section { background: var(--bg); }
.faq-wrap { max-width: 840px; margin: 0 auto; display: grid; gap: 12px; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow .3s, border-color .3s;
}
.faq-item.open { border-color: var(--primary); box-shadow: var(--shadow-lg); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
  background: none;
  border: none;
  padding: 18px 20px;
  text-align: left;
  color: var(--text);
  font-size: 16px;
  font-weight: 600;
  transition: background .25s;
}
.faq-question:hover { background: #F8FAF9; }
.faq-q-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
}
.faq-toggle { margin-left: auto; width: 24px; text-align: center; font-size: 20px; color: var(--muted); transition: transform .3s; }
.faq-item.open .faq-toggle { transform: rotate(45deg); color: var(--primary); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .3s;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
  padding: 0 20px;
}
.faq-item.open .faq-answer { max-height: 240px; padding: 0 20px 20px; }

/* CTA */
.cta-section { padding: 72px 0; background: var(--dark); }
.cta-box {
  background: var(--primary);
  border-radius: 20px;
  padding: 56px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  position: relative;
  overflow: hidden;
}
.cta-box::before {
  content: "";
  position: absolute;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  top: -80px;
  right: -60px;
}
.cta-content { position: relative; z-index: 1; }
.cta-content h2 { font-size: 28px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.cta-content p { color: rgba(255, 255, 255, 0.85); font-size: 16px; max-width: 480px; line-height: 1.7; }
.cta-actions { display: flex; flex-direction: column; gap: 12px; position: relative; z-index: 1; flex-shrink: 0; }
.cta-actions a { min-width: 180px; justify-content: center; }
.cta-actions .btn-outline { border-color: rgba(255, 255, 255, 0.4); background: transparent; color: #fff; }
.cta-actions .btn-outline:hover { background: rgba(255, 255, 255, 0.1); border-color: #fff; }

/* 页脚 */
.site-footer { background: var(--dark); color: #D1D5DB; padding: 56px 0 0; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.3fr;
  gap: 48px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.f-brand { font-size: 20px; color: #fff; font-weight: 700; margin-bottom: 8px; }
.f-brand b { color: #5EEAD4; }
.f-desc { font-size: 14px; color: #9CA3AF; line-height: 1.7; max-width: 280px; }
.site-footer h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 16px; }
.site-footer ul { list-style: none; display: grid; gap: 8px; }
.site-footer ul li a { font-size: 14px; color: #9CA3AF; transition: color .25s, padding-left .25s; }
.site-footer ul li a:hover { color: #5EEAD4; padding-left: 4px; }
.f-contact { display: grid; gap: 8px; font-size: 14px; color: #9CA3AF; }
.f-contact p i { width: 20px; color: #5EEAD4; }
.f-copyright {
  padding: 24px 0 28px;
  text-align: center;
  font-size: 14px;
  color: #6B7280;
}
.f-copyright a { color: #9CA3AF; }
.f-copyright a:hover { color: #fff; }

/* 响应式 */
@media (max-width: 1100px) {
  .site-sidebar { width: 210px; padding: 20px 14px; }
  .site-main { margin-left: 210px; }
  .brand-text { font-size: 15px; white-space: normal; }
  .feat-grid { grid-template-columns: repeat(2, 1fr); }
  .timeline { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .timeline::before { display: none; }
  .split-block { gap: 32px; }
}
@media (max-width: 860px) {
  .mobile-header { display: flex; }
  .mobile-drawer { display: none; }
  .site-sidebar { display: none; }
  .site-main { margin-left: 0; padding-top: 56px; }
  .page-hero { padding: 52px 0 60px; }
  .hero-inner { grid-template-columns: 1fr; gap: 36px; }
  .hero-panel { justify-content: center; }
  .hero-copy h1 { font-size: 32px; }
  .split-block { grid-template-columns: 1fr; }
  .split-block.reverse .split-media { order: 0; }
  .split-media img { height: 230px; }
  .scenario-item { flex-direction: column; align-items: flex-start; }
  .scenario-tags { justify-content: flex-start; max-width: none; }
  .cta-box { flex-direction: column; padding: 40px 28px; }
  .cta-actions { width: 100%; }
  .cta-actions a { width: 100%; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .section { padding: 56px 0; }
  .section-head h2 { font-size: 26px; }
}
@media (max-width: 540px) {
  .container { padding: 0 16px; }
  .hero-copy h1 { font-size: 28px; }
  .hero-buttons { flex-direction: column; }
  .hero-buttons .btn { width: 100%; justify-content: center; }
  .feat-grid { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; }
  .compliance-list { flex-direction: column; align-items: stretch; }
  .compliance-item { justify-content: center; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .cta-box { padding: 32px 20px; }
  .cta-content h2 { font-size: 22px; }
  .split-copy h3 { font-size: 22px; }
}

/* roulang page: category3 */
:root {
    --primary: #0F766E;
    --primary-dark: #0B5E57;
    --accent: #D97706;
    --accent-dark: #B45309;
    --bg: #F8FAF9;
    --surface: #FFFFFF;
    --text: #1F2937;
    --muted: #6B7280;
    --border: #E5E7EB;
    --dark: #111827;
    --radius-lg: 12px;
    --radius-md: 8px;
    --radius-sm: 6px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.08);
    --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  }

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

  html {
    scroll-behavior: smooth;
  }

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

  a {
    text-decoration: none;
    color: inherit;
  }
  img {
    max-width: 100%;
    display: block;
  }
  button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
  }
  ul, ol {
    list-style: none;
  }

  /* ============ 左侧导航 ============ */
  .site-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 240px;
    background: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 28px 20px 24px;
    z-index: 100;
    transition: transform 0.3s ease;
  }

  .sidebar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
    padding: 0 6px 24px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 24px;
  }
  .sidebar-logo b {
    background: var(--primary);
    color: #fff;
    border-radius: 8px;
    padding: 4px 10px;
    font-size: 18px;
  }
  .sidebar-logo span {
    color: var(--muted);
    font-weight: 400;
    font-size: 14px;
  }

  .site-sidebar nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
  }
  .site-sidebar nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 500;
    color: #374151;
    transition: background 0.2s, color 0.2s;
  }
  .site-sidebar nav a i {
    width: 20px;
    text-align: center;
    font-size: 15px;
  }
  .site-sidebar nav a:hover {
    background: rgba(15,118,110,0.08);
    color: var(--primary);
  }
  .site-sidebar nav a.active {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(15,118,110,0.25);
  }

  .sidebar-bottom {
    border-top: 1px solid var(--border);
    padding-top: 16px;
  }
  .sidebar-bottom .sidebar-cta {
    display: block;
    text-align: center;
    background: var(--accent);
    color: #fff;
    border-radius: 8px;
    padding: 10px 0;
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 14px;
    transition: background 0.2s;
  }
  .sidebar-bottom .sidebar-cta:hover {
    background: var(--accent-dark);
  }
  .sidebar-bottom .phone {
    text-align: center;
    font-size: 13px;
    color: var(--muted);
    line-height: 1.6;
  }
  .sidebar-bottom .phone b {
    display: block;
    font-size: 16px;
    color: var(--text);
    font-variant-numeric: tabular-nums;
  }
  .sidebar-bottom .beian {
    text-align: center;
    font-size: 12px;
    color: #9ca3af;
    margin-top: 10px;
  }

  /* ============ 移动端顶部导航 ============ */
  .mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    z-index: 120;
    align-items: center;
    padding: 0 16px;
    gap: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.03);
  }
  .mobile-header .menu-toggle {
    background: none;
    border: none;
    font-size: 22px;
    color: var(--text);
    cursor: pointer;
    padding: 6px;
  }
  .mobile-header .mobile-logo {
    flex: 1;
    font-size: 17px;
    font-weight: 700;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .mobile-header .mobile-logo b {
    color: var(--primary);
  }
  .mobile-header .mobile-login {
    background: var(--primary);
    color: #fff;
    font-size: 13px;
    padding: 7px 16px;
    border-radius: 20px;
    font-weight: 600;
  }

  .mobile-drawer {
    display: none;
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--surface);
    z-index: 119;
    padding: 20px 16px;
    overflow-y: auto;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }
  .mobile-drawer.open {
    transform: translateX(0);
  }
  .mobile-drawer nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }
  .mobile-drawer nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 500;
    color: #374151;
    background: var(--bg);
    transition: background 0.2s;
  }
  .mobile-drawer nav a i {
    width: 20px;
    text-align: center;
  }
  .mobile-drawer nav a:hover {
    background: rgba(15,118,110,0.08);
    color: var(--primary);
  }
  .mobile-drawer nav a.active {
    background: var(--primary);
    color: #fff;
  }

  /* ============ 主内容区 ============ */
  .main-content {
    margin-left: 240px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
  }

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

  .section {
    padding: 80px 0;
  }
  .section-gray {
    background: #f1f5f3;
  }

  .section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 56px;
  }
  .section-head .section-tag {
    display: inline-block;
    background: rgba(15,118,110,0.1);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 20px;
    margin-bottom: 16px;
    letter-spacing: 1px;
  }
  .section-head h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text);
    line-height: 1.3;
    margin-bottom: 14px;
  }
  .section-head p {
    color: var(--muted);
    font-size: 15px;
    line-height: 1.7;
  }

  /* ============ 页头 Hero ============ */
  .page-hero {
    position: relative;
    background-size: cover;
    background-position: center;
    padding: 92px 0 88px;
    color: #fff;
  }
  .page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(105deg, rgba(11,38,35,0.92) 0%, rgba(15,118,110,0.80) 55%, rgba(15,118,110,0.55) 100%);
  }
  .page-hero .page-hero-inner {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
    z-index: 2;
  }
  .breadcrumb {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: rgba(255,255,255,0.75);
    margin-bottom: 28px;
    letter-spacing: 0.5px;
  }
  .breadcrumb a {
    color: rgba(255,255,255,0.85);
    transition: color 0.2s;
  }
  .breadcrumb a:hover {
    color: #fff;
  }
  .breadcrumb i {
    font-size: 12px;
    color: rgba(255,255,255,0.5);
  }
  .page-hero h1 {
    font-size: 42px;
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 18px;
    letter-spacing: 1px;
  }
  .page-hero p {
    font-size: 17px;
    line-height: 1.8;
    color: rgba(255,255,255,0.88);
    max-width: 640px;
    margin-bottom: 32px;
  }
  .hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
  }
  .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent);
    color: #fff;
    font-weight: 600;
    padding: 13px 28px;
    border-radius: 8px;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 16px rgba(217,119,6,0.3);
  }
  .btn-primary:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(217,119,6,0.4);
  }
  .btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: #fff;
    font-weight: 500;
    padding: 12px 26px;
    border-radius: 8px;
    border: 1.5px solid rgba(255,255,255,0.55);
    transition: border-color 0.2s, background 0.2s;
  }
  .btn-outline:hover {
    border-color: #fff;
    background: rgba(255,255,255,0.08);
  }

  /* ============ 交错图文 ============ */
  .feature-row {
    display: flex;
    align-items: center;
    gap: 60px;
    margin-bottom: 80px;
  }
  .feature-row:last-child {
    margin-bottom: 0;
  }
  .feature-row.reverse {
    flex-direction: row-reverse;
  }
  .feature-media {
    flex: 1;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.3s;
  }
  .feature-media:hover {
    box-shadow: var(--shadow-lg);
  }
  .feature-media img {
    width: 100%;
    height: 340px;
    object-fit: cover;
    transition: transform 0.4s;
  }
  .feature-media:hover img {
    transform: scale(1.03);
  }
  .feature-body {
    flex: 1;
  }
  .feature-body h3 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 14px;
    line-height: 1.4;
  }
  .feature-body p {
    font-size: 15px;
    color: var(--muted);
    line-height: 1.85;
    margin-bottom: 22px;
  }
  .tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
  }
  .tag {
    display: inline-block;
    background: rgba(15,118,110,0.09);
    color: var(--primary);
    font-size: 13px;
    font-weight: 500;
    padding: 5px 14px;
    border-radius: 20px;
    border: 1px solid rgba(15,118,110,0.14);
  }

  /* ============ 流程 ============ */
  .process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
  }
  .process-grid::before {
    content: '';
    position: absolute;
    top: 36px;
    left: 12%;
    right: 12%;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(15,118,110,0.35), rgba(15,118,110,0.35), transparent);
  }
  .process-item {
    position: relative;
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 32px 24px 28px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s, box-shadow 0.3s;
  }
  .process-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
  }
  .process-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    background: var(--primary);
    color: #fff;
    font-size: 20px;
    font-weight: 700;
    border-radius: 50%;
    box-shadow: 0 4px 12px rgba(15,118,110,0.3);
  }
  .process-item h4 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 10px;
  }
  .process-item p {
    font-size: 13px;
    color: var(--muted);
    line-height: 1.7;
  }

  /* ============ 场景卡片 ============ */
  .scene-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }
  .scene-card {
    display: flex;
    gap: 20px;
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid transparent;
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  }
  .scene-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(15,118,110,0.18);
  }
  .scene-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    background: rgba(15,118,110,0.1);
    border-radius: 12px;
    color: var(--primary);
    font-size: 20px;
  }
  .scene-card h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
  }
  .scene-card p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.7;
  }

  /* ============ 数据统计 ============ */
  .stats-section {
    position: relative;
    background-size: cover;
    background-position: center;
    padding: 84px 0;
    color: #fff;
  }
  .stats-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(11,38,35,0.88);
  }
  .stats-inner {
    position: relative;
    z-index: 2;
  }
  .stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    text-align: center;
  }
  .stat-item {
    padding: 28px 16px;
    border-radius: var(--radius-lg);
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.12);
    transition: background 0.3s;
  }
  .stat-item:hover {
    background: rgba(255,255,255,0.1);
  }
  .stat-num {
    font-size: 40px;
    font-weight: 700;
    line-height: 1.2;
    font-variant-numeric: tabular-nums;
    color: #fff;
    margin-bottom: 8px;
  }
  .stat-num span {
    font-size: 22px;
    font-weight: 600;
    color: rgba(255,255,255,0.8);
  }
  .stat-label {
    font-size: 15px;
    color: rgba(255,255,255,0.75);
  }

  /* ============ FAQ ============ */
  .faq-list {
    max-width: 780px;
    margin: 0 auto;
  }
  .faq-item {
    background: var(--surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    margin-bottom: 14px;
    overflow: hidden;
    transition: box-shadow 0.3s;
  }
  .faq-item.open {
    box-shadow: var(--shadow-sm);
    border-color: rgba(15,118,110,0.25);
  }
  .faq-q {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    cursor: pointer;
    user-select: none;
  }
  .faq-q .q-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
  }
  .faq-q .q-text {
    flex: 1;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
  }
  .faq-q .q-toggle {
    font-size: 20px;
    color: var(--muted);
    transition: transform 0.3s;
    font-weight: 300;
  }
  .faq-item.open .q-toggle {
    transform: rotate(45deg);
    color: var(--primary);
  }
  .faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    padding: 0 24px;
  }
  .faq-item.open .faq-a {
    max-height: 300px;
    padding: 0 24px 20px 70px;
  }
  .faq-a p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.8;
  }

  /* ============ CTA ============ */
  .cta-section {
    background: var(--primary);
    padding: 72px 0;
    position: relative;
    overflow: hidden;
  }
  .cta-section::after {
    content: '';
    position: absolute;
    right: -60px;
    top: -60px;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: rgba(255,255,255,0.05);
  }
  .cta-inner {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    color: #fff;
    padding: 0 32px;
  }
  .cta-inner h2 {
    font-size: 34px;
    font-weight: 700;
    margin-bottom: 16px;
  }
  .cta-inner p {
    font-size: 16px;
    color: rgba(255,255,255,0.8);
    line-height: 1.8;
    margin-bottom: 30px;
  }
  .cta-btn {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    padding: 15px 42px;
    border-radius: 10px;
    transition: background 0.2s, transform 0.2s;
    box-shadow: 0 6px 20px rgba(0,0,0,0.2);
  }
  .cta-btn:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
  }
  .cta-note {
    margin-top: 18px;
    font-size: 13px;
    color: rgba(255,255,255,0.6);
  }

  /* ============ 页脚 ============ */
  .site-footer {
    background: var(--dark);
    color: rgba(255,255,255,0.75);
    margin-left: 240px;
    padding: 64px 0 24px;
  }
  .site-footer .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
  }
  .footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: 40px;
    margin-bottom: 48px;
  }
  .f-brand {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
  }
  .f-brand b {
    color: #fff;
    background: var(--primary);
    padding: 3px 8px;
    border-radius: 6px;
    margin-right: 4px;
  }
  .f-desc {
    font-size: 14px;
    line-height: 1.75;
    color: rgba(255,255,255,0.55);
    margin-bottom: 16px;
  }
  .footer-grid h4 {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 18px;
  }
  .footer-grid ul li {
    margin-bottom: 10px;
  }
  .footer-grid ul li a {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    transition: color 0.2s;
  }
  .footer-grid ul li a:hover {
    color: #fff;
  }
  .footer-grid ul li a i {
    font-size: 12px;
    margin-right: 4px;
    color: var(--accent);
  }
  .f-contact p {
    font-size: 14px;
    margin-bottom: 10px;
    color: rgba(255,255,255,0.6);
  }
  .f-contact p i {
    margin-right: 8px;
    color: var(--accent);
  }
  .f-copyright {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 24px;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
  }
  .f-copyright p {
    margin: 0;
  }

  /* ============ 焦点可见性 ============ */
  a:focus-visible, button:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
  }

  /* ============ 响应式 ============ */
  @media (max-width: 1024px) {
    .page-container {
      padding: 0 24px;
    }
    .feature-row {
      gap: 32px;
    }
    .feature-media img {
      height: 280px;
    }
    .process-grid {
      gap: 16px;
    }
    .process-grid::before {
      display: none;
    }
    .process-item {
      padding: 24px 16px;
    }
    .stats-grid {
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }
    .footer-grid {
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .site-footer {
      margin-left: 0;
    }
  }

  @media (max-width: 768px) {
    .site-sidebar {
      display: none;
    }
    .mobile-header {
      display: flex;
    }
    .mobile-drawer {
      display: block;
    }
    .main-content {
      margin-left: 0;
      padding-top: 56px;
    }
    .site-footer {
      margin-left: 0;
      padding: 48px 0 20px;
    }
    .page-hero {
      padding: 60px 0 56px;
    }
    .page-hero h1 {
      font-size: 30px;
    }
    .page-hero p {
      font-size: 15px;
    }
    .section {
      padding: 56px 0;
    }
    .section-head h2 {
      font-size: 26px;
    }
    .section-head {
      margin-bottom: 40px;
    }
    .feature-row, .feature-row.reverse {
      flex-direction: column;
      gap: 24px;
      margin-bottom: 48px;
    }
    .feature-media img {
      height: 220px;
    }
    .process-grid {
      grid-template-columns: 1fr 1fr;
    }
    .scene-grid {
      grid-template-columns: 1fr;
    }
    .stats-grid {
      grid-template-columns: 1fr;
    }
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 28px;
    }
    .faq-q {
      padding: 16px 18px;
      gap: 12px;
    }
    .faq-item.open .faq-a {
      padding: 0 18px 16px 50px;
    }
    .cta-inner h2 {
      font-size: 26px;
    }
    .page-container {
      padding: 0 20px;
    }
    .site-footer .container {
      padding: 0 20px;
    }
  }

  @media (max-width: 520px) {
    .process-grid {
      grid-template-columns: 1fr;
    }
    .hero-actions {
      flex-direction: column;
    }
    .btn-primary, .btn-outline {
      width: 100%;
      justify-content: center;
      text-align: center;
    }
    .page-hero .page-hero-inner {
      padding: 0 20px;
    }
    .cta-inner {
      padding: 0 20px;
    }
  }