:root {
  color-scheme: light;
  --ink: #23211d;
  --muted: #6b6257;
  --paper: #f8f5ef;
  --line: #ddd5c8;
  --accent: #9a5b3f;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Noto Sans TC", "PingFang TC", "Segoe UI", sans-serif;
  line-height: 1.8;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 24px 80px;
}

header {
  border-bottom: 1px solid var(--line);
  padding-bottom: 24px;
  margin-bottom: 40px;
}

.brand {
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin: 0 0 8px;
}

.tagline {
  color: var(--muted);
  margin: 0;
}

nav {
  margin-top: 20px;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.95rem;
}

a { color: var(--accent); text-underline-offset: 3px; }

h2 {
  font-size: 1.3rem;
  margin: 36px 0 12px;
}

p, li { margin: 0 0 12px; }

ul { padding-left: 1.3em; }

.card {
  background: #fffdf8;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 24px 28px;
  margin: 28px 0;
}

footer {
  border-top: 1px solid var(--line);
  margin-top: 56px;
  padding-top: 20px;
  color: var(--muted);
  font-size: 0.9rem;
}

.small { font-size: 0.9rem; color: var(--muted); }

@media (max-width: 520px) {
  main { padding: 40px 18px 64px; }
  .brand { font-size: 1.6rem; }
  .card { padding: 20px; }
}