body {
  font-family: "Source Han Serif SC", "Noto Serif SC", serif;
  background: #f4efe6;
  color: #2a261f;
  max-width: 720px;
  margin: 0 auto;
  padding: 28px 20px 64px;
  line-height: 1.75;
}
nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  margin-bottom: 24px;
  font-size: 0.88rem;
}
nav a, nav button {
  color: #8a6528;
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}
nav .home { text-decoration: none; font-weight: 600; }
h1 { font-size: 1.45rem; margin: 0 0 8px; }
h2 { font-size: 1.05rem; margin: 28px 0 10px; }
h3 { font-size: 0.95rem; margin: 18px 0 8px; }
p, li { font-size: 0.92rem; }
ul { padding-left: 1.2em; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
  margin: 12px 0 18px;
}
th, td {
  border: 1px solid #d7cbb3;
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}
th { background: #efe7d8; }
.updated { color: #6b6256; font-size: 0.8rem; margin-bottom: 22px; }
.note { color: #6b6256; font-size: 0.82rem; }
.lang-en { display: none; }
html[lang="en"] .lang-zh { display: none; }
html[lang="en"] .lang-en { display: block; }
html[lang="en"] body { font-family: "Georgia", "Times New Roman", serif; }