:root {
  --bg: #ffffff; --fg: #1d2330; --muted: #5b6577; --line: #e6e8ee; --card: #f6f7fa;
  --brand: #ff7a1a; --brand-ink: #ffffff; --head: #14213d; --head-ink: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f131b; --fg: #e8ebf1; --muted: #9aa4b5; --line: #262d3a; --card: #171c26; --head: #0b1324; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.7 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif; }
a { color: var(--brand); }
header { background: var(--head); color: var(--head-ink); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
nav { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 0; flex-wrap: wrap; }
nav .logo { color: var(--head-ink); text-decoration: none; font-weight: 700; font-size: 20px; letter-spacing: .2px; }
nav .logo b { color: var(--brand); }
nav .links { display: flex; gap: 16px; flex-wrap: wrap; }
nav .links a { color: #cfd6e4; text-decoration: none; font-size: 15px; }
nav .links a:hover, nav .links a[aria-current] { color: var(--head-ink); }
.hero { padding: 40px 0 48px; }
.hero h1 { margin: 0 0 8px; font-size: 34px; line-height: 1.25; }
.hero p { margin: 0; color: #cfd6e4; font-size: 18px; }
main { padding: 32px 0 48px; }
h1.page { font-size: 28px; margin: 0 0 4px; }
.meta { color: var(--muted); font-size: 14px; margin: 0 0 24px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
h3 { font-size: 17px; margin: 20px 0 6px; }
ul { padding-left: 22px; }
li { margin: 4px 0; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px; margin: 24px 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.card h3 { margin: 0 0 6px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.lang { display: inline-flex; gap: 8px; margin: 0 0 16px; }
.lang a { font-size: 14px; padding: 4px 10px; border: 1px solid var(--line); border-radius: 999px; text-decoration: none; color: var(--fg); }
.box { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; margin: 16px 0; }
.btn { display: inline-block; background: var(--brand); color: var(--brand-ink); padding: 10px 18px; border-radius: 10px; text-decoration: none; font-weight: 600; }
hr { border: 0; border-top: 1px solid var(--line); margin: 48px 0 32px; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; padding: 20px 0 32px; }
footer a { color: var(--muted); }
table { border-collapse: collapse; width: 100%; font-size: 15px; margin: 12px 0; display: block; overflow-x: auto; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: var(--card); }