:root {
  --primary: #14557b;
  --primary-dark: #0d3b57;
  --accent: #2e9e8f;
  --text: #26343f;
  --muted: #5c6b76;
  --bg: #ffffff;
  --bg-alt: #f3f7f9;
  --line: #e2e9ee;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}
.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
a { color: var(--primary); }
img { max-width: 100%; }

.site-header {
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 10px;
  padding-bottom: 10px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: inherit; }
.brand-logo { width: 44px; height: 44px; object-fit: contain; background: #fff; border-radius: 8px; }
.brand-text { font-weight: 600; font-size: 0.95rem; max-width: 420px; }
.site-nav { display: flex; gap: 18px; flex-wrap: wrap; }
.site-nav a { text-decoration: none; color: var(--text); font-size: 0.95rem; }
.site-nav a:hover { color: var(--primary); text-decoration: underline; }

.hero {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary) 55%, #1f7a8c);
  color: #fff;
  padding: 72px 0;
}
.hero h1 { margin: 0 0 14px; font-size: 2.1rem; line-height: 1.3; }
.hero p { max-width: 760px; margin: 0 0 18px; font-size: 1.05rem; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
}
.btn-primary { background: #fff; color: var(--primary-dark); }
.btn-primary:hover { background: #e8f4f8; }
.btn-outline { border: 1px solid #fff; color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,0.14); }

.section { padding: 56px 0; }
.section-alt { background: var(--bg-alt); }
.section h2 { margin: 0 0 18px; font-size: 1.6rem; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
}
.card h3 { margin: 0 0 8px; font-size: 1.05rem; color: var(--primary-dark); }
.card p { margin: 0; font-size: 0.95rem; color: var(--muted); }

.info-table { width: 100%; border-collapse: collapse; }
.info-table th, .info-table td {
  text-align: left;
  padding: 10px 12px;
  border: 1px solid var(--line);
  vertical-align: top;
}
.info-table th { width: 170px; background: var(--bg-alt); font-weight: 600; }
.scope { margin-top: 16px; }
.scope summary { cursor: pointer; color: var(--primary); font-weight: 600; }
.note { color: var(--muted); font-size: 0.92rem; }

.contact-list { list-style: none; margin: 0; padding: 0; }
.contact-list li { padding: 8px 0; border-bottom: 1px dashed var(--line); }

.site-footer {
  background: var(--primary-dark);
  color: #d6e2ea;
  padding: 30px 0;
  font-size: 0.9rem;
}
.site-footer p { margin: 4px 0; }
.site-footer a { color: #fff; }

@media (max-width: 640px) {
  .hero { padding: 48px 0; }
  .hero h1 { font-size: 1.6rem; }
  .section { padding: 40px 0; }
  .brand-text { max-width: 220px; font-size: 0.85rem; }
  .info-table th { width: 120px; }
}