:root {
  --bg: #f7f8fa;
  --panel: #ffffff;
  --text: #1d2129;
  --muted: #5b6270;
  --border: #e3e6eb;
  --accent: #2459d6;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171c;
    --panel: #1d2026;
    --text: #e8eaee;
    --muted: #a3a9b5;
    --border: #2d313a;
    --accent: #7ea3ff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.75 -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", sans-serif;
}
main {
  max-width: 44rem;
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
}
header.site {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}
header.site img { width: 44px; height: 44px; border-radius: 10px; }
header.site a { color: inherit; text-decoration: none; font-weight: 600; font-size: 1.15rem; }
h1 { font-size: 2rem; line-height: 1.3; margin: 0 0 1rem; }
h2 { font-size: 1.2rem; margin: 2.25rem 0 0.5rem; }
p, li { color: var(--text); }
.lead { font-size: 1.1rem; color: var(--muted); }
.muted { color: var(--muted); font-size: 0.9rem; }
a { color: var(--accent); }
ul { padding-left: 1.25rem; }
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}
footer {
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}
.card > h2:first-child { margin-top: 0; }
code { overflow-wrap: anywhere; }
.guide pre {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  overflow-x: auto;
}
.guide h1 { margin-bottom: 0.5rem; }
.guide li > ul, .guide li > ol { margin: 0.25rem 0; }
.guide img.shot {
  display: block;
  width: 100%;
  max-width: 40rem;
  margin: 0.75rem 0 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
}