:root {
  --bg: #ffffff;
  --surface: #f2f3f5;
  --text: #0f1115;
  --muted: #5b606b;
  --line: #e4e6ea;
  --accent: #b84102;
  --brand: #f55802;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1012;
    --surface: #1a1d22;
    --text: #f2f3f5;
    --muted: #9ba0aa;
    --line: #2a2e35;
    --accent: #ff7a33;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
}

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}

header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.brand {
  color: var(--text);
  font-weight: 700;
  font-size: 20px;
  text-decoration: none;
}

.brand span {
  color: var(--brand);
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  font-size: 15px;
}

a {
  color: var(--accent);
}

nav a {
  text-decoration: none;
}

.lang {
  margin: 24px 0 0;
  font-size: 15px;
  color: var(--muted);
}

h1 {
  font-size: 28px;
  line-height: 1.3;
  margin: 32px 0 4px;
}

h2 {
  font-size: 20px;
  margin: 32px 0 8px;
}

.updated {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 16px;
}

.summary {
  background: var(--surface);
  border-radius: 12px;
  padding: 4px 20px;
}

ul,
ol {
  padding-left: 22px;
}

li {
  margin: 6px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

th,
td {
  text-align: left;
  vertical-align: top;
  padding: 10px 8px;
  border-bottom: 1px solid var(--line);
}

th {
  color: var(--muted);
  font-weight: 600;
}

.divider {
  margin: 56px 0 0;
  border: 0;
  border-top: 1px solid var(--line);
}

.hero {
  padding: 48px 0 16px;
}

.hero p {
  color: var(--muted);
  font-size: 18px;
}

footer {
  margin-top: 56px;
  color: var(--muted);
  font-size: 14px;
}