:root {
  --bg: #f7f5f0;
  --card: #ffffff;
  --ink: #1f2430;
  --muted: #5d6472;
  --line: #e4e0d6;
  --accent: #2f6fd6;
  --accent-soft: #e6eefb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15181e;
    --card: #1d2129;
    --ink: #eceef2;
    --muted: #a3a9b5;
    --line: #2d323c;
    --accent: #7aa7f0;
    --accent-soft: #24304a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.7 system-ui, -apple-system, "Segoe UI", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 40px 20px 64px; }
header.top { display: flex; align-items: center; gap: 10px; margin-bottom: 40px; }
header.top a { color: var(--ink); text-decoration: none; font-weight: 700; letter-spacing: .02em; }
.logo { width: 32px; height: 32px; }
h1 { font-size: 2rem; line-height: 1.25; margin: 0 0 12px; }
h2 { font-size: 1.2rem; margin: 36px 0 8px; }
p, li { color: var(--ink); }
.lead { color: var(--muted); font-size: 1.1rem; margin: 0 0 28px; }
a { color: var(--accent); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px 22px;
  margin: 14px 0;
}
.card h3 { margin: 0 0 4px; font-size: 1.1rem; }
.card p { margin: 0; color: var(--muted); }
.tag { display: inline-block; font-size: .8rem; padding: 2px 10px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); margin-left: 8px; vertical-align: middle; }
.muted { color: var(--muted); }
footer { margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
ul { padding-left: 1.3em; }