:root { --max: 1180px; }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  line-height: 1.68;
  font-size: 15px;
}
.theme-dark {
  --bg: #0d1117;
  --card: #161b22;
  --fg: #e6edf3;
  --muted: #8b949e;
  --bd: #30363d;
  --accent: #58a6ff;
  background: var(--bg);
  color: var(--fg);
}
.theme-light {
  --bg: #f6f8fa;
  --card: #ffffff;
  --fg: #1f2328;
  --muted: #656d76;
  --bd: #d8dee4;
  --accent: #0969da;
  background: var(--bg);
  color: var(--fg);
}
a { color: inherit; }

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--bd);
}
.nav-in {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.brand {
  font-weight: 800;
  letter-spacing: 0.14em;
  font-size: 13px;
  text-decoration: none;
  color: var(--fg);
}
.brand span { color: var(--accent); font-weight: 600; letter-spacing: 0.1em; }
.nav-links { display: flex; gap: 4px; flex-wrap: wrap; }
.nav-links a {
  text-decoration: none;
  font-size: 13px;
  color: var(--muted);
  padding: 6px 11px;
  border-radius: 7px;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--fg); background: color-mix(in srgb, var(--fg) 8%, transparent); }
.nav-links a.active { color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px 70px; }

.hero { padding: 76px 0 26px; }
.eyebrow {
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}
.hero h1, .page-head h1 {
  font-size: clamp(26px, 3.4vw, 42px);
  line-height: 1.24;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  max-width: 900px;
}
.page-head h1 { font-size: clamp(24px, 2.8vw, 34px); }
.lede { color: var(--muted); font-size: 16px; max-width: 760px; margin: 0; }

.strip { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.strip.light { margin: 22px 0 4px; }
.strip-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--bd);
  background: var(--card);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 12.5px;
  white-space: nowrap;
}
.strip-item .k { color: var(--muted); }
.strip-item .v { font-weight: 600; }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.dot.green { background: #2ea043; }
.dot.red { background: #f85149; }
.dot.amber { background: #d29922; }
.dot.blue { background: #58a6ff; }

.card {
  background: var(--card);
  border: 1px solid var(--bd);
  border-radius: 14px;
  padding: 26px 28px;
  margin: 22px 0;
}
.chart-card { padding: 12px; }
.card img { width: 100%; height: auto; display: block; }
.card h2 { font-size: 18px; margin: 0 0 10px; letter-spacing: -0.01em; }
.card p { margin: 8px 0; }
.muted { color: var(--muted); font-size: 13.5px; }
.note { border-left: 3px solid var(--accent); }

.grid-2, .grid-3 {
  display: grid;
  gap: 22px;
  align-items: start;
}
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(330px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.grid-2 > .card, .grid-3 > .card { margin: 0; }
.grid-2 + .card, .grid-3 + .card { margin-top: 22px; }

.link-card {
  text-decoration: none;
  display: block;
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.link-card:hover { transform: translateY(-3px); border-color: var(--accent); }
.link-card h3 { margin: 0 0 8px; font-size: 17px; color: var(--accent); }
.link-card p { color: var(--muted); font-size: 13.5px; margin: 0 0 12px; }
.go { font-size: 12.5px; color: var(--accent); }

.page-head { padding: 54px 0 4px; }

.tbl { width: 100%; border-collapse: collapse; font-size: 13px; }
.tbl th, .tbl td { padding: 8px 10px; border-bottom: 1px solid var(--bd); text-align: right; white-space: nowrap; }
.tbl th { color: var(--muted); font-weight: 600; font-size: 12px; }
.tbl td.l, .tbl th.l { text-align: left; }
.tbl tbody tr:hover { background: color-mix(in srgb, var(--fg) 4%, transparent); }
.tbl.two td:nth-child(odd) { color: var(--muted); }
.scroll { overflow-x: auto; }

.list { margin: 8px 0 0; padding-left: 20px; }
.list li { margin: 7px 0; }
code {
  background: color-mix(in srgb, var(--fg) 9%, transparent);
  padding: 1px 6px;
  border-radius: 5px;
  font-size: 12.5px;
}

.foot {
  max-width: var(--max);
  margin: 0 auto;
  padding: 22px 20px 54px;
  border-top: 1px solid var(--bd);
  color: var(--muted);
  font-size: 11.5px;
}

@media (max-width: 760px) {
  .nav-in { height: auto; padding: 10px 14px; flex-direction: column; align-items: flex-start; gap: 8px; }
  .nav-links { width: 100%; overflow-x: auto; }
  .wrap { padding: 0 14px 50px; }
  .hero { padding-top: 44px; }
  .card { padding: 20px 16px; }
  .strip-item { font-size: 12px; }
}