body {
  margin: 0;
  padding: 2rem 1.25rem;
  font-family:
    system-ui,
    -apple-system,
    'PingFang TC',
    'Noto Sans TC',
    sans-serif;
  line-height: 1.6;
  color: #222;
  background: #fff;
}
main {
  max-width: 40rem;
  margin: 0 auto;
}
a {
  color: #0b5cad;
}
.banner {
  padding: 0.75rem 1rem;
  border: 2px solid #c77700;
  border-radius: 0.5rem;
  background: #fff4e0;
  color: #5a3600;
  font-weight: 600;
}
@media (prefers-color-scheme: dark) {
  body {
    color: #eee;
    background: #111;
  }
  a {
    color: #7ab8ff;
  }
  .banner {
    background: #3a2600;
    color: #ffd9a0;
  }
}