:root {
  --bg: #fbf8f6;
  --surface: #ffffff;
  --text: #1f1a1c;
  --muted: #6b6266;
  --border: #ece4e1;
  --accent: #c8334a;
  --accent-soft: #fbe9ec;
  --radius: 14px;
  --maxw: 760px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141113;
    --surface: #1d191b;
    --text: #f3eeef;
    --muted: #a99ea2;
    --border: #2e282a;
    --accent: #ff6b81;
    --accent-soft: #3a1f25;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}
a { color: var(--accent); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

header.site {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
header.site .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap; padding-top: 14px; padding-bottom: 14px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 17px; color: var(--text); text-decoration: none;
}
.brand svg { width: 26px; height: 26px; color: var(--accent); }
nav.links { display: flex; gap: 18px; flex-wrap: wrap; font-size: 15px; }
nav.links a { color: var(--muted); text-decoration: none; }
nav.links a:hover, nav.links a[aria-current="page"] { color: var(--text); }

main { padding: 48px 0 64px; }

.hero { text-align: center; padding: 56px 0 24px; }
.hero svg { width: 56px; height: 56px; color: var(--accent); }
.hero h1 { font-size: clamp(32px, 6vw, 46px); line-height: 1.15; margin: 18px 0 12px; letter-spacing: -0.02em; }
.hero p.lead { font-size: 19px; color: var(--muted); margin: 0 auto 28px; max-width: 520px; }
.btn {
  display: inline-block; padding: 12px 22px; border-radius: 999px;
  background: var(--accent); color: #fff; font-weight: 600; text-decoration: none;
}
.btn:hover { filter: brightness(1.06); }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin-top: 48px; }
.card {
  display: block; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 20px; color: var(--text); text-decoration: none;
}
.card:hover { border-color: var(--accent); }
.card strong { display: block; margin-bottom: 4px; }
.card span { color: var(--muted); font-size: 14px; }

.doc h1 { font-size: clamp(28px, 5vw, 36px); line-height: 1.2; margin: 0 0 6px; letter-spacing: -0.01em; }
.doc .meta { color: var(--muted); font-size: 14px; margin: 0 0 32px; }
.doc h2 { font-size: 21px; margin: 40px 0 10px; padding-top: 8px; }
.doc h3 { font-size: 17px; margin: 24px 0 6px; }
.doc ul { padding-left: 22px; }
.doc li { margin: 4px 0; }
.note {
  background: var(--accent-soft); border-radius: var(--radius);
  padding: 14px 18px; margin: 20px 0;
}
.table-scroll { overflow-x: auto; margin: 14px 0; }
table { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 520px; }
th, td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { font-weight: 600; color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; }

details {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px 18px; margin: 10px 0;
}
details summary { cursor: pointer; font-weight: 600; }
details[open] summary { margin-bottom: 8px; }
details p:last-child { margin-bottom: 0; }

.contact-box {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px 22px; margin: 18px 0;
}
.contact-box p { margin: 4px 0; }

footer.site { border-top: 1px solid var(--border); color: var(--muted); font-size: 14px; }
footer.site .wrap {
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding-top: 22px; padding-bottom: 28px;
}
footer.site nav { display: flex; gap: 16px; flex-wrap: wrap; }
footer.site a { color: var(--muted); }