:root {
  --bg: #f4f6f5;
  --surface: #ffffff;
  --text: #15171a;
  --muted: #5f6b66;
  --line: #e1e6e3;
  --accent: #0e9670;
  --accent-soft: rgba(14, 150, 112, 0.1);
  --code-bg: #eef2f0;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: #0b1512;
    --surface: #12201b;
    --text: #e7efeb;
    --muted: #94a69e;
    --line: #22332c;
    --accent: #30c27d;
    --accent-soft: rgba(48, 194, 125, 0.12);
    --code-bg: #1a2b24;
    color-scheme: dark;
  }
}
:root[data-theme='dark'] {
  --bg: #0b1512;
  --surface: #12201b;
  --text: #e7efeb;
  --muted: #94a69e;
  --line: #22332c;
  --accent: #30c27d;
  --accent-soft: rgba(48, 194, 125, 0.12);
  --code-bg: #1a2b24;
  color-scheme: dark;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  -webkit-text-size-adjust: 100%;
}
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
header.hero { display: flex; gap: 16px; align-items: center; margin-bottom: 24px; }
header.hero img { width: 72px; height: 72px; border-radius: 16px; flex: none; }
header.hero h1 { margin: 0; font-size: 26px; line-height: 1.25; }
header.hero p { margin: 4px 0 0; color: var(--muted); }
nav.top { display: flex; gap: 16px; flex-wrap: wrap; margin: 0 0 24px; font-size: 15px; }
a { color: var(--accent); text-underline-offset: 3px; }
h2 { font-size: 20px; margin: 36px 0 12px; padding-top: 8px; border-top: 1px solid var(--line); }
h3 { font-size: 17px; margin: 24px 0 8px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px; margin: 12px 0; }
ol, ul { padding-left: 1.4em; }
li { margin: 6px 0; }
code { background: var(--code-bg); border-radius: 6px; padding: 1px 6px; font: 14px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; word-break: break-all; }
pre { background: var(--code-bg); border-radius: 10px; padding: 12px 14px; overflow-x: auto; }
pre code { background: none; padding: 0; word-break: normal; }
table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 12px 0; display: block; overflow-x: auto; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; white-space: nowrap; }
.note { background: var(--accent-soft); border-radius: 10px; padding: 10px 14px; }
.muted { color: var(--muted); }
footer { margin-top: 48px; color: var(--muted); font-size: 14px; }