/* roulang page: index */
:root {
  --primary: #1E6FFF;
  --primary-hover: #155EEF;
  --accent: #FF6B35;
  --secondary: #0EA5E9;
  --bg-soft: #F8FAFC;
  --bg-blue: #EFF6FF;
  --text-heading: #0F172A;
  --text-body: #334155;
  --text-muted: #64748B;
  --border: #E2E8F0;
  --footer-bg: #0F172A;
  --radius-card: 16px;
  --radius-small: 12px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 32px rgba(15,23,42,0.10);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: #fff;
  color: var(--text-body);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color .2s; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== 通用按钮 ===== */
.btn-accent {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent); color: #fff;
  font-size: 15px; font-weight: 600;
  padding: 12px 28px; border-radius: 999px;
  transition: all .25s;
  box-shadow: 0 4px 14px rgba(255,107,53,0.28);
}
.btn-accent:hover { background: #e85c2a; transform: translateY(-1px); box-shadow: 0 8px 22px rgba(255,107,53,0.35); }
.btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  background: #fff; color: var(--primary);
  font-size: 15px; font-weight: 600;
  padding: 12px 28px; border-radius: 999px;
  border: 1.5px solid var(--primary);
  transition: all .25s;
}
.btn-outline:hover { background: var(--bg-blue); border-color: var(--primary-hover); color: var(--primary-hover); }
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--primary); color: #fff;
  font-size: 15px; font-weight: 600;
  padding: 12px 32px; border-radius: 999px;
  transition: all .25s;
  box-shadow: 0 4px 14px rgba(30,111,255,0.25);
}
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); box-shadow: 0 8px 22px rgba(30,111,255,0.32); }

/* ===== 悬浮胶囊导航 ===== */
.site-header {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  width: calc(100% - 32px);
  max-width: 1200px;
}
.floating-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255,255,255,0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 10px 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .3s;
}
.floating-nav:hover { box-shadow: var(--shadow-lg); }
.logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 19px; font-weight: 800; color: var(--text-heading);
  white-space: nowrap;
}
.logo-icon {
  width: 34px; height: 34px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 16px;
}
.desktop-nav {
  display: flex; align-items: center; gap: 6px;
  margin: 0 auto 0 32px;
}
.desktop-nav a {
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 14px; font-weight: 500;
  color: var(--text-body);
  transition: all .2s;
}
.desktop-nav a:hover { background: var(--bg-blue); color: var(--primary); }
.desktop-nav a.active { background: var(--bg-blue); color: var(--primary); font-weight: 600; }
.nav-cta { margin-left: 8px; }
.mobile-toggle {
  display: none;
  width: 40px; height: 40px;
  border-radius: 50%;
  align-items: center; justify-content: center;
  color: var(--text-heading); font-size: 18px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.85);
}
.mobile-menu {
  display: none;
  position: fixed;
  top: 76px;
  left: 16px;
  right: 16px;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(18px);
  border-radius: 20px;
  padding: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  z-index: 999;
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block;
  padding: 14px 18px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-heading);
  margin-bottom: 6px;
  text-align: center;
}
.mobile-menu a:hover { background: var(--bg-blue); color: var(--primary); }
.mobile-menu a.active { background: var(--bg-blue); color: var(--primary); font-weight: 600; }
.mobile-menu .btn-accent { display: flex; justify-content: center; margin-top: 10px; }

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 168px 0 96px;
  background: linear-gradient(135deg, #F8FAFC 0%, #EFF6FF 60%, #E0EDFF 100%);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  right: -80px; top: 20%;
  width: 420px; height: 420px;
  background: repeating-linear-gradient(135deg, rgba(30,111,255,0.07) 0px, rgba(30,111,255,0.07) 10px, transparent 10px, transparent 20px);
  border-radius: 50%;
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  left: -60px; bottom: -40px;
  width: 280px; height: 280px;
  background: repeating-linear-gradient(45deg, rgba(255,107,53,0.06) 0px, rgba(255,107,53,0.06) 12px, transparent 12px, transparent 24px);
  border-radius: 50%;
  pointer-events: none;
}
.hero-grid {
  position: relative; z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}
.hero h1 {
  font-size: 42px;
  font-weight: 800;
  color: var(--text-heading);
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin-bottom: 24px;
}
.hero h1 .highlight { color: var(--primary); }
.hero-sub {
  font-size: 18px;
  color: #475569;
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 520px;
}
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-trust { margin-top: 36px; display: flex; align-items: center; gap: 20px; }
.hero-trust .trust-item { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-muted); }
.hero-trust .trust-item i { color: var(--secondary); }
.hero-image {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(15,23,42,0.12);
  border: 4px solid #fff;
}
.hero-image img { width: 100%; height: auto; object-fit: cover; }

/* ===== Section 通用 ===== */
.section { padding: 88px 0; }
.section-alt { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head .eyebrow {
  display: inline-block;
  font-size: 13px; font-weight: 600;
  color: var(--primary);
  background: var(--bg-blue);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}
.section-head h2 { font-size: 30px; font-weight: 700; color: var(--text-heading); line-height: 1.3; margin-bottom: 12px; }
.section-head p { font-size: 16px; color: var(--text-muted); line-height: 1.7; }
.section-head .view-all {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; color: var(--primary); font-weight: 500;
  margin-top: 16px;
  transition: gap .2s;
}
.section-head .view-all:hover { gap: 10px; }

/* ===== 核心服务 ===== */
.services-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.service-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 36px 32px;
  transition: all .25s;
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: opacity .25s;
}
.service-card:hover { border-color: var(--primary); box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.service-card:hover::before { opacity: 1; }
.service-icon {
  width: 56px; height: 56px;
  background: #F0F9FF;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
  font-size: 22px;
  margin-bottom: 20px;
}
.service-card h3 { font-size: 20px; font-weight: 600; color: var(--text-heading); margin-bottom: 10px; }
.service-card p { font-size: 15px; color: #475569; line-height: 1.7; margin-bottom: 16px; }
.service-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; font-weight: 500; color: var(--primary);
  transition: gap .2s;
}
.service-link:hover { gap: 10px; }

/* ===== 优势数据 ===== */
.stats-section { background: var(--bg-blue); padding: 72px 0; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stat-item {
  text-align: center;
  padding: 16px 24px;
  position: relative;
}
.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0; top: 20%; bottom: 20%;
  width: 1px;
  background: #d7e2f0;
}
.stat-num {
  font-size: 48px; font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  margin-bottom: 6px;
}
.stat-num .unit { font-size: 24px; font-weight: 600; margin-left: 4px; }
.stat-label { font-size: 14px; color: var(--text-muted); }
.stat-label i { color: var(--accent); margin-right: 4px; }

/* ===== 案例 ===== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.case-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: all .3s;
}
.case-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: transparent; }
.case-card-img { width: 100%; aspect-ratio: 16/10; overflow: hidden; }
.case-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.case-card:hover .case-card-img img { transform: scale(1.03); }
.case-card-body { padding: 24px 24px 28px; }
.case-tag {
  display: inline-block;
  font-size: 12px; font-weight: 600;
  color: var(--primary);
  background: var(--bg-blue);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.case-card h3 { font-size: 18px; font-weight: 600; color: var(--text-heading); margin-bottom: 8px; line-height: 1.4; }
.case-card p { font-size: 14px; color: var(--text-muted); line-height: 1.7; margin-bottom: 14px; }
.case-meta { font-size: 13px; color: #94A3B8; display: flex; align-items: center; gap: 6px; }

/* ===== 最新动态 ===== */
.news-section { background: var(--bg-soft); }
.news-list { display: flex; flex-direction: column; gap: 14px; }
.news-card {
  display: grid;
  grid-template-columns: 120px 1fr 160px;
  align-items: center;
  gap: 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-small);
  padding: 20px 24px;
  transition: all .25s;
}
.news-card:hover { border-color: var(--primary); box-shadow: var(--shadow-sm); }
.news-card-tag {
  display: inline-block;
  font-size: 12px; font-weight: 600;
  color: var(--primary);
  background: var(--bg-blue);
  padding: 5px 14px;
  border-radius: 999px;
  text-align: center;
  white-space: nowrap;
}
.news-card-body h3 { font-size: 17px; font-weight: 600; color: var(--text-heading); margin-bottom: 4px; line-height: 1.4; }
.news-card-body p { font-size: 14px; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; line-height: 1.5; }
.news-card-meta { display: flex; align-items: center; justify-content: flex-end; gap: 16px; }
.news-date { font-size: 13px; color: #94A3B8; display: flex; align-items: center; gap: 5px; }
.news-link { font-size: 14px; font-weight: 500; color: var(--primary); display: inline-flex; align-items: center; gap: 4px; transition: gap .2s; }
.news-link:hover { gap: 8px; }
.news-empty {
  text-align: center;
  padding: 60px 20px;
  background: #fff;
  border: 1px dashed var(--border);
  border-radius: var(--radius-card);
  color: var(--text-muted);
  font-size: 15px;
}
.news-empty i { font-size: 36px; color: #CBD5E1; margin-bottom: 12px; display: block; }

/* ===== 解决方案 ===== */
.solution-section { background: #fff; }
.solution-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.solution-content h2 { font-size: 30px; font-weight: 700; color: var(--text-heading); margin-bottom: 16px; line-height: 1.3; }
.solution-content .lead { font-size: 16px; color: var(--text-muted); margin-bottom: 28px; line-height: 1.8; }
.solution-points { display: flex; flex-direction: column; gap: 18px; }
.solution-point {
  display: flex; gap: 16px;
  padding: 16px 20px;
  background: var(--bg-soft);
  border-radius: var(--radius-small);
  border-left: 3px solid var(--primary);
  transition: background .2s;
}
.solution-point:hover { background: var(--bg-blue); }
.solution-point i { font-size: 20px; color: var(--primary); flex-shrink: 0; margin-top: 2px; }
.solution-point h4 { font-size: 16px; font-weight: 600; color: var(--text-heading); margin-bottom: 2px; }
.solution-point p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }
.solution-image {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.solution-image img { width: 100%; height: 100%; object-fit: cover; }

/* ===== FAQ ===== */
.faq-section { background: var(--bg-soft); }
.faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-small);
  padding: 0;
  overflow: hidden;
  transition: all .25s;
}
.faq-item.active { border-color: var(--primary); box-shadow: var(--shadow-sm); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 20px 28px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-heading);
  text-align: left;
  background: #fff;
  transition: background .2s;
}
.faq-question:hover { background: var(--bg-soft); }
.faq-icon {
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
  font-size: 14px;
  transition: all .3s;
  flex-shrink: 0;
}
.faq-item.active .faq-icon { transform: rotate(45deg); background: var(--primary); color: #fff; border-color: var(--primary); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
  padding: 0 28px;
  font-size: 15px;
  color: #475569;
  line-height: 1.75;
}
.faq-answer-inner { padding-bottom: 22px; }

/* ===== 联系/CTA ===== */
.contact-section { background: #fff; position: relative; }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  background: var(--bg-soft);
  border-radius: 24px;
  padding: 56px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.contact-info h2 { font-size: 28px; font-weight: 700; color: var(--text-heading); margin-bottom: 14px; }
.contact-info > p { font-size: 15px; color: var(--text-muted); margin-bottom: 32px; line-height: 1.8; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 22px;
}
.contact-item .icon {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--bg-blue);
  color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}
.contact-item h4 { font-size: 15px; font-weight: 600; color: var(--text-heading); }
.contact-item p, .contact-item a { font-size: 14px; color: var(--text-muted); line-height: 1.5; }
.contact-item a:hover { color: var(--primary); }
.contact-form { background: #fff; border-radius: 18px; padding: 32px; box-shadow: var(--shadow-sm); }
.contact-form h3 { font-size: 20px; font-weight: 700; color: var(--text-heading); margin-bottom: 8px; }
.contact-form .form-tip { font-size: 14px; color: var(--text-muted); margin-bottom: 24px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 500; color: var(--text-heading); margin-bottom: 6px; }
.form-group input,
.form-group textarea {
  width: 100%;
  height: 46px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0 16px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text-heading);
  background: #fff;
  transition: all .25s;
  outline: none;
}
.form-group textarea { height: 110px; padding: 14px 16px; resize: vertical; }
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30,111,255,0.15);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: #B0B8C4; }

/* ===== 页脚 ===== */
.site-footer { background: var(--footer-bg); color: #94A3B8; padding: 72px 0 0; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1fr 1.1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo { color: #fff; margin-bottom: 16px; }
.footer-brand .logo-icon { background: linear-gradient(135deg, var(--accent), var(--primary)); }
.footer-brand p { font-size: 14px; line-height: 1.8; color: #94A3B8; }
.footer-col h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 18px; letter-spacing: 0.5px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { font-size: 14px; color: #94A3B8; transition: all .2s; display: inline-flex; align-items: center; gap: 6px; }
.footer-col a:hover { color: #fff; transform: translateX(2px); }
.footer-col a i { font-size: 12px; color: var(--accent); }
.footer-contact li { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; margin-bottom: 12px; line-height: 1.6; }
.footer-contact i { color: var(--accent); margin-top: 3px; }
.footer-bottom {
  padding: 20px 0;
  text-align: center;
  font-size: 14px;
  color: #64748B;
  border-top: 1px solid rgba(255,255,255,0.06);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero { padding: 140px 0 72px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero h1 { font-size: 36px; }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .news-card { grid-template-columns: 100px 1fr 130px; gap: 14px; padding: 16px 20px; }
  .solution-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; padding: 40px; }
  .contact-form { margin-top: 8px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  .desktop-nav, .nav-cta { display: none; }
  .mobile-toggle { display: flex; }
  .section { padding: 64px 0; }
  .section-head h2 { font-size: 26px; }
  .services-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stat-item:nth-child(2)::after { display: none; }
  .stat-item:nth-child(2), .stat-item:nth-child(4) { padding-right: 0; }
  .stat-num { font-size: 40px; }
  .cases-grid { grid-template-columns: 1fr; }
  .news-card { grid-template-columns: 1fr; gap: 10px; }
  .news-card-meta { justify-content: flex-start; }
  .news-card-tag { display: inline-block; width: auto; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .contact-grid { padding: 28px 20px; border-radius: 18px; }
  .contact-form { padding: 24px 20px; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .floating-nav { padding: 8px 16px; }
  .logo { font-size: 16px; }
  .hero { padding: 120px 0 56px; }
  .hero h1 { font-size: 28px; }
  .hero-sub { font-size: 15px; }
  .hero-cta { flex-direction: column; gap: 12px; }
  .btn-accent, .btn-outline { justify-content: center; width: 100%; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat-num { font-size: 32px; }
  .stat-num .unit { font-size: 18px; }
  .solution-point { padding: 14px 16px; }
  .faq-question { padding: 16px 18px; font-size: 15px; }
  .faq-answer { padding: 0 18px; }
  .faq-answer-inner { padding-bottom: 18px; }
  .footer-bottom { font-size: 13px; padding: 16px 0; }
}

/* roulang page: article */
:root {
            --primary: #1E6FFF;
            --primary-hover: #155EEF;
            --accent: #FF6B35;
            --secondary: #0EA5E9;
            --bg: #F8FAFC;
            --white: #FFFFFF;
            --text-dark: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --radius-lg: 16px;
            --radius-md: 12px;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.10);
            --container: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: var(--bg);
            color: var(--text-body);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        body.loading * {
            transition: none !important;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: all 0.2s ease;
        }

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

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

        .section {
            padding: 80px 0;
        }

        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 40px;
        }

        .section-head h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--text-dark);
            line-height: 1.3;
        }

        .section-head p {
            color: var(--text-muted);
            font-size: 15px;
        }

        .section-head .link-more {
            color: var(--text-muted);
            font-size: 14px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all 0.2s;
        }

        .section-head .link-more:hover {
            color: var(--primary);
            gap: 10px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: #EFF6FF;
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
            line-height: 1.6;
            white-space: nowrap;
        }

        .tag-accent {
            background: rgba(255, 107, 53, 0.12);
            color: #D9551F;
        }

        .tag-light {
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
            backdrop-filter: blur(4px);
        }

        .btn-accent,
        .btn-outline,
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            height: 48px;
            padding: 0 28px;
            border-radius: 999px;
            transition: all 0.2s ease;
            line-height: 1;
            white-space: nowrap;
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(255, 107, 53, 0.25);
        }

        .btn-accent:hover {
            background: #F05A24;
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(255, 107, 53, 0.35);
            color: #fff;
        }

        .btn-outline {
            background: var(--white);
            color: var(--primary);
            border: 1px solid #BFDBFE;
        }

        .btn-outline:hover {
            background: #F0F7FF;
            border-color: var(--primary);
            color: var(--primary);
        }

        .btn-ghost {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--border);
        }

        .btn-ghost:hover {
            background: #F0F7FF;
            border-color: var(--primary);
        }

        .site-header {
            position: relative;
            z-index: 100;
            padding: 16px 16px 0;
        }

        .floating-nav {
            max-width: var(--container);
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(255, 255, 255, 0.86);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 12px 24px;
            box-shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
            gap: 16px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 19px;
            font-weight: 800;
            color: var(--text-dark);
            white-space: nowrap;
        }

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

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            border-radius: 12px;
            font-size: 14px;
            box-shadow: 0 4px 12px rgba(30, 111, 255, 0.25);
            flex-shrink: 0;
        }

        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .desktop-nav a {
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            transition: all 0.2s;
        }

        .desktop-nav a:hover {
            color: var(--primary);
            background: #F0F7FF;
        }

        .desktop-nav a.active {
            background: #EFF6FF;
            color: var(--primary);
            font-weight: 600;
        }

        .nav-cta {
            height: 42px;
            padding: 0 22px;
            font-size: 14px;
        }

        .mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: #F0F7FF;
            color: var(--primary);
            font-size: 17px;
            transition: all 0.2s;
        }

        .mobile-toggle:hover {
            background: #E0EDFF;
        }

        .mobile-menu {
            display: none;
            max-width: var(--container);
            margin: 8px auto 0;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(16px);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 16px;
            flex-direction: column;
            gap: 6px;
            box-shadow: var(--shadow-lg);
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu a {
            padding: 12px 16px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .mobile-menu a:hover {
            background: #F0F7FF;
            color: var(--primary);
        }

        .mobile-menu a.active {
            background: #EFF6FF;
            color: var(--primary);
            font-weight: 600;
        }

        .article-hero {
            position: relative;
            background-size: cover;
            background-position: center;
            padding: 72px 0 48px;
            color: #fff;
            margin: 16px 16px 0;
            border-radius: 24px;
            overflow: hidden;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(30, 111, 255, 0.72));
            z-index: 1;
        }

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

        .article-hero-inner {
            max-width: 820px;
            margin: 0 auto;
            text-align: center;
        }

        .article-hero-inner h1 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.35;
            margin: 18px 0 16px;
            color: #fff;
            word-break: break-word;
        }

        .article-meta {
            display: flex;
            justify-content: center;
            align-items: center;
            flex-wrap: wrap;
            gap: 18px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 18px;
        }

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

        .article-summary {
            font-size: 15px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.9);
            max-width: 680px;
            margin: 0 auto;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .breadcrumb {
            display: flex;
            justify-content: center;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 28px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
        }

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

        .breadcrumb i {
            font-size: 11px;
            opacity: 0.5;
        }

        .breadcrumb span {
            max-width: 360px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            display: inline-block;
            vertical-align: bottom;
        }

        .article-section {
            padding: 60px 0 40px;
        }

        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 300px;
            gap: 48px;
            align-items: start;
        }

        .article-main {
            min-width: 0;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 40px;
            box-shadow: var(--shadow-sm);
        }

        .article-body {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text-body);
        }

        .article-body h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-dark);
            margin: 48px 0 20px;
            padding-bottom: 14px;
            border-bottom: 2px solid #EFF6FF;
            line-height: 1.4;
        }

        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-dark);
            margin: 32px 0 14px;
            line-height: 1.5;
        }

        .article-body p {
            margin-bottom: 22px;
        }

        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

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

        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: #F1F5F9;
            padding: 18px 22px;
            border-radius: 0 12px 12px 0;
            margin: 28px 0;
            color: var(--text-body);
            font-size: 15px;
            line-height: 1.8;
        }

        .article-body pre {
            background: #0F172A;
            color: #F8FAFC;
            padding: 22px;
            border-radius: 12px;
            overflow-x: auto;
            margin: 28px 0;
            font-size: 14px;
            line-height: 1.7;
        }

        .article-body code {
            font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
        }

        .article-body img {
            max-width: 100%;
            border-radius: 12px;
            margin: 28px 0;
            box-shadow: var(--shadow-sm);
        }

        .article-body ul,
        .article-body ol {
            padding-left: 24px;
            margin-bottom: 22px;
        }

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

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 28px 0;
            font-size: 15px;
        }

        .article-body th,
        .article-body td {
            border: 1px solid var(--border);
            padding: 12px 14px;
            text-align: left;
        }

        .article-body th {
            background: #F8FAFC;
            font-weight: 600;
            color: var(--text-dark);
        }

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

        .article-tags {
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
        }

        .article-tags .tag {
            font-size: 13px;
        }

        .not-found {
            text-align: center;
            padding: 64px 20px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 16px;
        }

        .not-found i {
            font-size: 44px;
            color: #CBD5E1;
            margin-bottom: 16px;
            display: block;
        }

        .not-found p {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 20px;
        }

        .article-side {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 100px;
        }

        .side-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 24px;
            box-shadow: var(--shadow-sm);
        }

        .side-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid #EFF6FF;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .side-card h3 i {
            color: var(--primary);
            font-size: 14px;
        }

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

        .side-nav li {
            margin-bottom: 4px;
        }

        .side-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            transition: all 0.2s;
        }

        .side-nav a i {
            color: var(--primary);
            font-size: 12px;
            transition: transform 0.2s;
        }

        .side-nav a:hover {
            background: #F0F7FF;
            color: var(--primary);
            padding-left: 16px;
        }

        .side-nav a:hover i {
            transform: translateX(3px);
        }

        .related-section {
            padding: 40px 0 60px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-bottom: 36px;
        }

        .related-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all 0.25s ease;
        }

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

        .related-card .card-img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }

        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

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

        .related-card .card-body {
            padding: 22px;
        }

        .related-card .card-body .tag {
            margin-bottom: 12px;
        }

        .related-card .card-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.5;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .back-link {
            text-align: center;
            margin-top: 8px;
        }

        .back-link a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            padding: 12px 24px;
            border-radius: 999px;
            background: #EFF6FF;
            transition: all 0.2s;
        }

        .back-link a:hover {
            background: var(--primary);
            color: #fff;
            gap: 12px;
        }

        .cta-band {
            background: linear-gradient(135deg, #0F172A 0%, #1E3A8A 100%);
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-band::before {
            content: '';
            position: absolute;
            right: -80px;
            top: -80px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(255, 107, 53, 0.25), transparent 70%);
        }

        .cta-band::after {
            content: '';
            position: absolute;
            left: 20%;
            bottom: -60px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(30, 111, 255, 0.3), transparent 70%);
        }

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

        .cta-band h2 {
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }

        .cta-band p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 16px;
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }

        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding-top: 64px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.3fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

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

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: #94A3B8;
            max-width: 320px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

        .footer-col ul {
            list-style: none;
        }

        .footer-col li {
            margin-bottom: 12px;
            font-size: 14px;
        }

        .footer-col li a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: #94A3B8;
            transition: all 0.2s;
        }

        .footer-col li a:hover {
            color: #fff;
            gap: 12px;
        }

        .footer-col li a i {
            font-size: 11px;
            color: var(--secondary);
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            line-height: 1.6;
        }

        .footer-contact li i {
            width: 20px;
            color: var(--secondary);
            font-size: 14px;
            text-align: center;
            flex-shrink: 0;
        }

        .footer-contact li a {
            color: #94A3B8;
        }

        .footer-contact li a:hover {
            color: #fff;
        }

        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            font-size: 13px;
            color: #64748B;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        @media (max-width: 1023px) {
            .section {
                padding: 60px 0;
            }

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

            .article-side {
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
                gap: 16px;
                margin-top: 20px;
            }

            .side-card {
                flex: 1 1 220px;
            }

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

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

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

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

            .desktop-nav,
            .nav-cta {
                display: none;
            }

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

            .article-hero {
                margin: 12px 12px 0;
                padding: 48px 0 36px;
                border-radius: 18px;
            }

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

            .article-summary {
                display: none;
            }

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

            .breadcrumb {
                margin-top: 20px;
                font-size: 12px;
            }

            .section-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
                margin-bottom: 28px;
            }

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

            .article-section {
                padding: 40px 0 20px;
            }

            .article-main {
                padding: 24px 18px;
                border-radius: 14px;
            }

            .article-body {
                font-size: 16px;
                line-height: 1.85;
            }

            .article-body h2 {
                font-size: 22px;
                margin-top: 36px;
            }

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

            .related-section {
                padding: 30px 0 48px;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }

            .cta-band {
                padding: 56px 0;
            }

            .cta-band h2 {
                font-size: 25px;
            }

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

            .footer-brand p {
                max-width: 100%;
            }
        }

        @media (max-width: 520px) {
            .floating-nav {
                padding: 10px 16px;
                border-radius: 999px;
            }

            .logo {
                font-size: 16px;
            }

            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 13px;
            }

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

            .article-meta {
                flex-direction: column;
                gap: 6px;
            }

            .article-side {
                flex-direction: column;
            }

            .related-card .card-img {
                height: 160px;
            }
        }

        @media (max-width: 360px) {
            .logo {
                font-size: 14px;
            }

            .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 12px;
                border-radius: 9px;
            }
        }

/* roulang page: category1 */
:root {
      --primary: #1E6FFF;
      --primary-hover: #155EEF;
      --accent: #FF6B35;
      --accent-hover: #E85A2A;
      --secondary: #0EA5E9;
      --bg: #F8FAFC;
      --bg-blue: #EFF6FF;
      --dark: #0F172A;
      --title: #0F172A;
      --text: #334155;
      --muted: #64748B;
      --border: #E2E8F0;
      --radius-lg: 16px;
      --radius-md: 12px;
      --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
      --shadow-lg: 0 12px 32px rgba(15,23,42,0.10);
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background: #fff;
      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 ease; }
    button, input, textarea, select { font: inherit; }

    .container { max-width: 1200px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }
    .section { padding: 80px 0; scroll-margin-top: 110px; }
    .section-sm { padding: 48px 0; scroll-margin-top: 110px; }

    .section-head { margin-bottom: 44px; }
    .section-head .overline {
      display: inline-flex; align-items: center; gap: 6px;
      font-size: 13px; font-weight: 600; color: var(--primary);
      background: var(--bg-blue); padding: 6px 16px; border-radius: 999px;
      margin-bottom: 12px; letter-spacing: .02em;
    }
    .section-title { font-size: 30px; font-weight: 700; color: var(--title); line-height: 1.3; text-align: center; }
    .section-sub { font-size: 16px; color: var(--muted); text-align: center; max-width: 680px; margin: 12px auto 0; line-height: 1.75; }

    /* 按钮 */
    .btn-accent {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      background: var(--accent); color: #fff; font-weight: 600;
      border-radius: 999px; padding: 12px 28px; border: none; cursor: pointer;
      font-size: 15px; transition: all .2s ease;
      box-shadow: 0 2px 8px rgba(255,107,53,0.2);
    }
    .btn-accent:hover {
      background: var(--accent-hover); transform: translateY(-1px);
      box-shadow: 0 8px 24px rgba(255,107,53,0.28);
    }
    .btn-outline {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      background: #fff; color: var(--primary); font-weight: 600;
      border: 1px solid var(--primary); border-radius: 999px; padding: 12px 28px;
      font-size: 15px; cursor: pointer; transition: all .2s ease;
    }
    .btn-outline:hover { background: var(--bg-blue); transform: translateY(-1px); }
    .btn-primary {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      background: var(--primary); color: #fff; font-weight: 600;
      border-radius: 999px; padding: 12px 28px; border: none; cursor: pointer;
      font-size: 15px; transition: all .2s ease;
      box-shadow: 0 2px 8px rgba(30,111,255,0.2);
    }
    .btn-primary:hover {
      background: var(--primary-hover); transform: translateY(-1px);
      box-shadow: 0 8px 24px rgba(30,111,255,0.28);
    }

    /* 标签 */
    .badge {
      display: inline-flex; align-items: center; gap: 6px;
      background: var(--bg-blue); color: var(--primary);
      font-size: 13px; font-weight: 500; padding: 5px 14px;
      border-radius: 999px; line-height: 1.6;
    }
    .badge-accent { background: #FFF3EE; color: var(--accent); }

    /* 悬浮胶囊导航 */
    .site-header {
      position: fixed; top: 0; left: 0; right: 0; z-index: 100;
      padding: 16px 24px 0;
    }
    .floating-nav {
      max-width: 1200px; margin: 0 auto;
      display: flex; align-items: center; justify-content: space-between;
      background: rgba(255,255,255,0.85);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid var(--border);
      border-radius: 999px;
      padding: 12px 24px;
      box-shadow: 0 4px 20px rgba(15,23,42,0.06);
    }
    .logo { display: flex; align-items: center; gap: 9px; font-size: 19px; font-weight: 800; color: var(--title); white-space: nowrap; }
    .logo-icon {
      width: 36px; height: 36px; border-radius: 10px; flex-shrink: 0;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #fff; display: flex; align-items: center; justify-content: center; font-size: 16px;
    }
    .desktop-nav { display: flex; align-items: center; gap: 2px; }
    .desktop-nav a {
      padding: 8px 18px; border-radius: 999px; font-size: 15px; font-weight: 500;
      color: var(--text); transition: all .2s ease;
    }
    .desktop-nav a:hover { color: var(--primary); background: var(--bg); }
    .desktop-nav a.active { background: var(--bg-blue); color: var(--primary); font-weight: 600; }
    .nav-cta { padding: 9px 22px; font-size: 14px; flex-shrink: 0; }
    .mobile-toggle {
      display: none; width: 42px; height: 42px; border-radius: 50%;
      border: 1px solid var(--border); background: #fff; color: var(--title);
      align-items: center; justify-content: center; cursor: pointer; font-size: 16px;
      transition: all .2s;
    }
    .mobile-toggle:hover { color: var(--primary); border-color: var(--primary); }
    .mobile-menu {
      display: none; max-width: 1200px; margin: 8px auto 0;
      background: rgba(255,255,255,0.96);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid var(--border); border-radius: 20px;
      padding: 16px; box-shadow: 0 8px 30px rgba(15,23,42,0.08);
    }
    .mobile-menu.open { display: block; }
    .mobile-menu a {
      display: block; padding: 12px 16px; border-radius: 12px;
      font-size: 15px; font-weight: 500; color: var(--text);
    }
    .mobile-menu a.active { background: var(--bg-blue); color: var(--primary); font-weight: 600; }
    .mobile-menu .btn-accent { margin-top: 10px; text-align: center; }

    /* Hero */
    .hero-section {
      position: relative;
      padding: 170px 0 96px;
      background: linear-gradient(135deg, #F8FAFC 0%, #EFF6FF 100%);
      overflow: hidden;
    }
    .hero-section::before {
      content: '';
      position: absolute; inset: 0;
      background-image: url('/assets/images/backpic/back-1.png');
      background-size: cover; background-position: center;
      opacity: 0.07; pointer-events: none;
    }
    .hero-section .container { position: relative; z-index: 2; }
    .hero-content h1 {
      font-size: 44px; font-weight: 800; color: var(--title);
      line-height: 1.22; letter-spacing: -0.02em; margin: 16px 0 0;
    }
    .hero-content h1 .accent { color: var(--accent); }
    .hero-sub {
      font-size: 18px; line-height: 1.8; color: #475569;
      margin: 20px 0 32px; max-width: 560px;
    }
    .hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
    .hero-visual { position: relative; }
    .hero-visual .main-img {
      border-radius: 20px; box-shadow: var(--shadow-lg);
      width: 100%; height: auto; object-fit: cover;
    }
    .hero-float-card {
      position: absolute; left: -20px; bottom: 30px;
      background: #fff; border-radius: 14px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-lg);
      padding: 14px 20px; display: flex; align-items: center; gap: 12px;
      animation: float 4s ease-in-out infinite;
    }
    .hero-float-card .fc-icon {
      width: 42px; height: 42px; border-radius: 10px;
      background: var(--bg-blue); color: var(--primary);
      display: flex; align-items: center; justify-content: center; font-size: 18px;
    }
    .hero-float-card .fc-text { font-size: 13px; color: var(--muted); line-height: 1.4; }
    .hero-float-card .fc-text strong { display: block; color: var(--title); font-size: 16px; }
    @keyframes float {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-10px); }
    }

    /* 服务卡片 */
    .services-section { background: #fff; }
    .service-card {
      background: #fff; border: 1px solid var(--border);
      border-radius: var(--radius-lg); padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
      position: relative; overflow: hidden;
      height: 100%;
    }
    .service-card:hover {
      transform: translateY(-4px); box-shadow: var(--shadow-lg);
      border-color: #cbd5e1;
    }
    .service-icon {
      width: 56px; height: 56px; border-radius: 50%;
      background: #F0F9FF; color: var(--primary);
      display: flex; align-items: center; justify-content: center;
      font-size: 22px; margin-bottom: 20px;
    }
    .service-card h3 { font-size: 20px; font-weight: 600; color: var(--title); }
    .service-card p { font-size: 14px; color: #475569; margin-top: 10px; line-height: 1.75; }
    .service-link {
      display: inline-flex; align-items: center; gap: 4px;
      margin-top: 16px; font-size: 14px; font-weight: 500; color: var(--primary);
    }
    .service-link i { transition: transform .2s ease; font-size: 12px; }
    .service-card:hover .service-link i { transform: translateX(4px); }
    .service-featured {
      background: linear-gradient(135deg, #FFFFFF 0%, #F0F9FF 100%);
      border: 1px solid #BFDBFE;
    }
    .service-featured h3 { font-size: 24px; }
    .service-featured .service-icon { background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #fff; }

    /* 数据统计 */
    .stats-section { background: var(--bg-blue); }
    .stat-grid {
      display: grid; grid-template-columns: repeat(4, 1fr);
      background: #fff; border-radius: var(--radius-lg);
      border: 1px solid var(--border); box-shadow: var(--shadow-sm);
      overflow: hidden;
    }
    .stat-item { padding: 40px 20px; text-align: center; border-right: 1px solid var(--border); }
    .stat-item:last-child { border-right: none; }
    .stat-number {
      font-size: 46px; font-weight: 800; color: var(--primary);
      line-height: 1.15; font-variant-numeric: tabular-nums;
    }
    .stat-number span { color: var(--accent); font-size: 30px; margin-left: 2px; font-weight: 800; }
    .stat-label { margin-top: 8px; font-size: 14px; color: var(--muted); }

    /* 场景卡片 */
    .scenarios-section { background: #fff; }
    .scenario-card {
      background: #fff; border: 1px solid var(--border);
      border-radius: var(--radius-lg); overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform .25s ease, box-shadow .25s ease;
      height: 100%;
    }
    .scenario-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
    .scenario-card .cover { overflow: hidden; aspect-ratio: 16 / 9; }
    .scenario-card .cover img {
      width: 100%; height: 100%; object-fit: cover;
      transition: transform .4s ease;
    }
    .scenario-card:hover .cover img { transform: scale(1.04); }
    .scenario-body { padding: 20px 22px 24px; }
    .scenario-body h3 { font-size: 18px; font-weight: 600; color: var(--title); margin: 8px 0 6px; }
    .scenario-body p { font-size: 14px; color: var(--muted); line-height: 1.7; }

    /* 流程 */
    .process-section { background: var(--bg); }
    .process-step {
      position: relative; background: #fff;
      border: 1px solid var(--border); border-radius: var(--radius-lg);
      padding: 32px 24px 24px; box-shadow: var(--shadow-sm);
      height: 100%; transition: box-shadow .25s ease;
    }
    .process-step:hover { box-shadow: var(--shadow-lg); }
    .process-step::after {
      content: '\f054';
      font-family: 'Font Awesome 6 Free'; font-weight: 900;
      position: absolute; top: 50%; right: -18px;
      transform: translateY(-50%); z-index: 2;
      background: var(--bg); color: var(--primary);
      border: 1px solid var(--border); border-radius: 50%;
      width: 32px; height: 32px;
      display: flex; align-items: center; justify-content: center;
      font-size: 12px;
    }
    .process-step:last-child::after { display: none; }
    .process-num { font-size: 40px; font-weight: 800; color: var(--secondary); opacity: 0.75; line-height: 1; }
    .process-step h3 { font-size: 19px; font-weight: 600; margin: 12px 0 8px; color: var(--title); }
    .process-step p { font-size: 14px; color: var(--text); line-height: 1.7; }

    /* 内容资源卡 */
    .resources-section { background: #fff; }
    .resource-card {
      background: #fff; border: 1px solid var(--border);
      border-radius: var(--radius-lg); overflow: hidden;
      box-shadow: var(--shadow-sm); height: 100%;
      display: flex; flex-direction: column;
      transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
    }
    .resource-card:hover {
      transform: translateY(-4px); box-shadow: var(--shadow-lg);
      border-color: #cbd5e1;
    }
    .resource-card .cover { overflow: hidden; aspect-ratio: 16 / 10; }
    .resource-card .cover img {
      width: 100%; height: 100%; object-fit: cover;
      transition: transform .4s ease;
    }
    .resource-card:hover .cover img { transform: scale(1.05); }
    .resource-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
    .resource-body h3 { font-size: 17px; font-weight: 600; color: var(--title); line-height: 1.4; }
    .resource-body p { font-size: 14px; color: var(--muted); margin-top: 8px; flex: 1; line-height: 1.7; }
    .resource-tag { align-self: flex-start; margin-bottom: 12px; font-size: 12px; }

    /* 相关导航 */
    .related-links { background: var(--bg); }
    .related-card {
      background: #fff; border: 1px solid var(--border);
      border-radius: var(--radius-md); padding: 20px 28px;
      display: flex; align-items: center; justify-content: center; gap: 16px;
      flex-wrap: wrap; box-shadow: var(--shadow-sm);
    }
    .related-card span { font-size: 14px; font-weight: 600; color: var(--title); }
    .related-card a {
      display: inline-flex; align-items: center; gap: 6px;
      font-size: 14px; font-weight: 500; color: var(--primary);
      padding: 8px 20px; border: 1px solid var(--border); border-radius: 999px;
      transition: all .2s;
    }
    .related-card a:hover { background: var(--bg-blue); border-color: var(--primary); }

    /* FAQ */
    .faq-section { background: var(--bg); }
    .faq-item {
      background: #fff; border: 1px solid var(--border);
      border-radius: var(--radius-md); padding: 20px 24px;
      margin-bottom: 16px; transition: border-color .25s ease, box-shadow .25s ease;
    }
    .faq-item.active { border-color: var(--primary); box-shadow: var(--shadow-sm); }
    .faq-question {
      display: flex; justify-content: space-between; align-items: center;
      cursor: pointer; font-weight: 600; font-size: 16px; color: var(--title);
      gap: 16px; user-select: none;
    }
    .faq-icon {
      width: 28px; height: 28px; border-radius: 50%; flex-shrink: 0;
      background: #F1F5F9; color: var(--muted);
      display: flex; align-items: center; justify-content: center;
      font-size: 14px; transition: all .25s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg); background: var(--primary); color: #fff;
    }
    .faq-answer {
      max-height: 0; overflow: hidden;
      transition: max-height .3s ease;
      color: var(--text); font-size: 15px; line-height: 1.75;
    }
    .faq-item.active .faq-answer { max-height: 320px; padding-top: 12px; }

    /* CTA */
    .cta-section { background: #fff; }
    .cta-card {
      background: #fff; border: 1px solid var(--border);
      border-radius: 24px; overflow: hidden; box-shadow: var(--shadow-lg);
    }
    .cta-info {
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      color: #fff; padding: 48px; height: 100%;
    }
    .cta-info h2 { font-size: 28px; font-weight: 700; line-height: 1.3; }
    .cta-info p { color: rgba(255,255,255,0.92); font-size: 15px; line-height: 1.8; margin-top: 14px; }
    .cta-contact-list { margin-top: 24px; list-style: none; }
    .cta-contact-list li {
      display: flex; align-items: center; gap: 12px;
      padding: 8px 0; font-size: 15px;
    }
    .cta-contact-list i {
      width: 36px; height: 36px; border-radius: 50%;
      background: rgba(255,255,255,0.16);
      display: flex; align-items: center; justify-content: center; font-size: 14px; flex-shrink: 0;
    }
    .cta-contact-list a:hover { color: #fff; text-decoration: underline; }
    .cta-form { padding: 48px; }
    .cta-form h3 { font-size: 22px; font-weight: 700; color: var(--title); }
    .cta-form .form-desc { font-size: 14px; color: var(--muted); margin: 8px 0 24px; }
    .form-group { margin-bottom: 18px; }
    .form-group label {
      display: block; font-size: 14px; font-weight: 500;
      color: var(--title); margin-bottom: 6px;
    }
    .form-group input, .form-group textarea {
      width: 100%; height: 46px; border: 1px solid var(--border);
      border-radius: 10px; padding: 0 14px; font-size: 15px;
      color: var(--text); background: #fff;
      transition: border-color .2s ease, box-shadow .2s ease;
    }
    .form-group textarea { height: auto; min-height: 96px; padding-top: 12px; resize: vertical; }
    .form-group input:focus, .form-group textarea:focus {
      outline: none; border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(30,111,255,0.15);
    }

    /* 页脚 */
    .site-footer { background: var(--dark); color: #94A3B8; padding: 64px 0 0; }
    .footer-grid {
      display: grid; grid-template-columns: 2fr 1fr 1fr 1.3fr;
      gap: 40px; padding-bottom: 48px;
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .footer-brand .logo { color: #fff; }
    .footer-brand p { margin-top: 16px; font-size: 14px; line-height: 1.8; color: #94A3B8; }
    .footer-col h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 16px; }
    .footer-col ul { list-style: none; }
    .footer-col li { margin-bottom: 10px; }
    .footer-col a {
      color: #94A3B8; font-size: 14px;
      display: inline-flex; align-items: center; gap: 6px;
      transition: color .2s ease;
    }
    .footer-col a:hover { color: #fff; }
    .footer-contact li { display: flex; gap: 10px; align-items: center; }
    .footer-bottom {
      padding: 24px 0; text-align: center;
      font-size: 14px; color: #94A3B8;
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      .hero-content h1 { font-size: 36px; }
      .stat-grid { grid-template-columns: repeat(2, 1fr); }
      .stat-item:nth-child(2) { border-right: none; }
      .stat-item { border-bottom: 1px solid var(--border); }
      .stat-item:nth-child(3), .stat-item:nth-child(4) { border-bottom: none; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .site-header { padding: 12px 16px 0; }
      .desktop-nav, .nav-cta { display: none; }
      .mobile-toggle { display: flex; }
      .floating-nav { padding: 10px 16px; border-radius: 22px; }
      .logo { font-size: 17px; }
      .hero-section { padding: 140px 0 64px; }
      .hero-content h1 { font-size: 32px; }
      .hero-sub { font-size: 16px; margin: 16px 0 24px; }
      .section { padding: 56px 0; }
      .section-title { font-size: 25px; }
      .container { padding-left: 16px; padding-right: 16px; }
      .cta-info { padding: 32px 24px; }
      .cta-form { padding: 32px 24px; }
      .footer-grid { grid-template-columns: 1fr; gap: 28px; }
      .hero-float-card { left: 8px; bottom: 16px; }
      .process-step::after { display: none; }
      .stat-number { font-size: 36px; }
    }
    @media (max-width: 520px) {
      .hero-content h1 { font-size: 28px; }
      .hero-actions .btn-accent, .hero-actions .btn-outline {
        width: 100%;
      }
      .stat-grid { grid-template-columns: 1fr 1fr; }
      .stat-item { padding: 24px 12px; }
      .stat-number { font-size: 32px; }
      .cta-contact-list li { font-size: 14px; }
    }