:root {
  --paper: #f7f3ef;
  --ink: #2b2b2b;
  --muted: #5f5a56;
  --rose: #a8445a;
  --line: #e3d9d1;
  --card: #fffdfb;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC",
    "Noto Sans TC", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.75;
  font-size: 16px;
}

header {
  border-bottom: 1px solid var(--line);
  background: rgba(247, 243, 239, 0.94);
}

.wrap {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto;
}

header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
}

.brand {
  font-family: "Iowan Old Style", "Songti TC", "Noto Serif TC", Georgia, serif;
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  color: var(--ink);
  text-decoration: none;
}

.brand span {
  display: block;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.62rem;
  letter-spacing: 0.28em;
  color: var(--rose);
  margin-top: 2px;
}

nav {
  display: flex;
  gap: 18px;
  font-size: 0.9rem;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}

nav a:hover,
nav a[aria-current="page"] {
  color: var(--rose);
  border-bottom-color: var(--rose);
}

main {
  padding: 40px 0 64px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: clamp(24px, 5vw, 48px);
  box-shadow: 0 12px 40px rgba(43, 43, 43, 0.05);
}

h1 {
  font-family: "Iowan Old Style", "Songti TC", "Noto Serif TC", Georgia, serif;
  font-size: clamp(1.8rem, 4vw, 2.35rem);
  line-height: 1.25;
  margin: 0 0 6px;
  font-weight: 600;
}

.updated {
  color: var(--muted);
  font-size: 0.86rem;
  margin: 0 0 28px;
}

h2 {
  font-size: 1.08rem;
  margin: 34px 0 10px;
  color: var(--ink);
}

h2:first-of-type { margin-top: 22px; }

p { margin: 0 0 14px; }

ul, ol { margin: 0 0 16px; padding-left: 1.35em; }

li { margin: 6px 0; }

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

.lede {
  font-size: 1.02rem;
  color: var(--muted);
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 48px 0 28px;
}

.en { font-size: 0.95rem; color: var(--muted); }

.en h1, .en h2 { color: var(--ink); }

footer {
  border-top: 1px solid var(--line);
  padding: 22px 0 40px;
  color: var(--muted);
  font-size: 0.84rem;
}

footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  align-items: center;
  justify-content: space-between;
}

@media (max-width: 520px) {
  header .wrap { align-items: flex-start; }
  nav { font-size: 0.84rem; gap: 12px; }
}