:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --text: #1d1d1f;
  --muted: #5f6368;
  --line: #e4e1da;
  --accent: #b4532a;
  --accent-soft: #f6e9e2;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141414;
    --surface: #1d1d1d;
    --text: #f2f2f2;
    --muted: #a8a8a8;
    --line: #2f2f2f;
    --accent: #f08a5d;
    --accent-soft: #2c1f19;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang TC", "Noto Sans TC", "Helvetica Neue", Arial, sans-serif;
}

a { color: var(--accent); }

.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }

header.site {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 650;
  font-size: 19px;
  text-decoration: none;
}

.brand img { width: 32px; height: 32px; border-radius: 8px; }

nav.site { display: flex; gap: 18px; font-size: 15px; flex-wrap: wrap; }
nav.site a { color: var(--muted); text-decoration: none; }
nav.site a:hover, nav.site a[aria-current="page"] { color: var(--text); }

main { padding: 40px 0 64px; }

h1 { font-size: 34px; line-height: 1.2; margin: 0 0 16px; letter-spacing: -0.01em; }
h2 { font-size: 22px; line-height: 1.3; margin: 40px 0 10px; }
h3 { font-size: 18px; margin: 24px 0 6px; }
p, ul, ol { margin: 0 0 14px; }
li { margin-bottom: 6px; }

.lede { font-size: 19px; color: var(--muted); }
.updated { color: var(--muted); font-size: 15px; }

.badge {
  display: inline-block;
  margin: 8px 0 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 15px;
  font-weight: 600;
}

.hero { padding: 24px 0 8px; }
.hero img { width: 96px; height: 96px; border-radius: 22px; margin-bottom: 20px; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
  margin: 28px 0;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 18px 6px;
}

.card h3 { margin-top: 0; }
.card p { color: var(--muted); font-size: 16px; }

.summary {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 22px 6px;
  margin: 24px 0;
}

.summary ul { padding-left: 20px; }

footer.site {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  padding: 24px 0 40px;
}

footer.site .wrap { display: flex; gap: 16px; flex-wrap: wrap; justify-content: space-between; }
footer.site a { color: var(--muted); }

@media (max-width: 520px) {
  body { font-size: 16px; }
  h1 { font-size: 28px; }
  main { padding-top: 28px; }
}

.summary h2 { margin-top: 0; }