:root {
  --ink: #1f2328;
  --muted: #6a737d;
  --line: #e6e8eb;
  --bg: #ffffff;
  --soft: #f6f8fa;
  --accent: #3b5bdb;
  --warn-bg: #fff8e6;
  --warn-line: #f2d98a;
  --warn-ink: #7a5b00;
  --todo-bg: #ffe9ec;
  --todo-ink: #b4232f;
  --maxw: 760px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 17px;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.site-header { border-bottom: 1px solid var(--line); background: var(--bg); }
.site-header .inner, main, .site-footer .inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}
.site-header .inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 60px; flex-wrap: wrap; gap: 4px 0;
  padding-top: 10px; padding-bottom: 10px;
}
.brand { font-weight: 700; font-size: 18px; color: var(--ink); }
.brand small { color: var(--muted); font-weight: 400; font-size: 13px; margin-left: 6px; }
nav.docnav { display: flex; flex-wrap: wrap; }
nav.docnav a { margin-right: 16px; font-size: 15px; color: var(--muted); }
nav.docnav a:hover, nav.docnav a.active { color: var(--accent); }
main { padding-top: 28px; padding-bottom: 64px; }
h1 { font-size: 28px; line-height: 1.3; margin: 8px 0 6px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
p, li { font-size: 17px; }
ul, ol { padding-left: 22px; }
li { margin: 4px 0; }
strong { font-weight: 600; }
.lede { font-size: 17px; color: var(--muted); }
.draft {
  background: var(--warn-bg); border: 1px solid var(--warn-line); color: var(--warn-ink);
  border-radius: 10px; padding: 12px 16px; font-size: 14px; margin: 16px 0 8px; line-height: 1.6;
}
.todo {
  background: var(--todo-bg); color: var(--todo-ink);
  border-radius: 4px; padding: 0 5px; font-size: 0.9em; font-weight: 600;
}
.site-footer { border-top: 1px solid var(--line); background: var(--soft); padding: 28px 0; color: var(--muted); font-size: 14px; }
.site-footer a { color: var(--muted); }
.site-footer .links { margin-bottom: 8px; }
.site-footer .links a { margin-right: 16px; }
.cards { display: grid; gap: 14px; margin: 24px 0; }
@media (min-width: 560px) { .cards { grid-template-columns: 1fr 1fr; } }
.card {
  display: block; border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px;
  color: var(--ink); transition: border-color .15s, transform .15s;
}
.card:hover { border-color: var(--accent); text-decoration: none; transform: translateY(-1px); }
.card h3 { margin: 0 0 4px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }