:root {
  --accent: #106973;
  --accent-dark: #0b4d55;
  --ink: #14181a;
  --muted: #5b6770;
  --line: #e2e8ea;
  --bg: #f6f8f9;
  --card: #ffffff;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.62;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 28px 20px 72px; }
header.site {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  padding: 40px 20px 34px;
  text-align: center;
}
header.site h1 { margin: 0 0 6px; font-size: 1.7rem; letter-spacing: .2px; }
header.site p { margin: 0; opacity: .92; font-size: 1.02rem; }
nav.tabs {
  display: flex; flex-wrap: wrap; gap: 8px; justify-content: center;
  margin-top: 18px;
}
nav.tabs a {
  color: #fff; text-decoration: none; font-size: .92rem;
  border: 1px solid rgba(255,255,255,.5); border-radius: 999px;
  padding: 6px 15px; transition: background .15s;
}
nav.tabs a:hover, nav.tabs a[aria-current="page"] { background: rgba(255,255,255,.18); }
h2 {
  font-size: 1.22rem; margin: 34px 0 10px; padding-bottom: 7px;
  border-bottom: 2px solid var(--line); color: var(--accent-dark);
}
h3 { font-size: 1.02rem; margin: 22px 0 6px; }
p, li { font-size: 1rem; }
.muted { color: var(--muted); }
a { color: var(--accent); }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 6px 22px 18px; margin: 16px 0;
}
.faq h3 { color: var(--ink); }
.faq .zh { color: var(--muted); font-size: .95rem; }
.lang-label {
  display: inline-block; font-size: .78rem; font-weight: 600; letter-spacing: .06em;
  text-transform: uppercase; color: var(--accent); background: rgba(16,105,115,.09);
  border-radius: 6px; padding: 2px 9px; margin: 26px 0 0;
}
.contact { font-size: 1.06rem; }
.contact a { font-weight: 600; }
footer.site {
  text-align: center; color: var(--muted); font-size: .85rem;
  padding: 26px 20px; border-top: 1px solid var(--line); margin-top: 30px;
}
hr.div { border: none; border-top: 1px solid var(--line); margin: 30px 0; }