:root {
  --bg: #f4efe5;
  --paper: #fffaf0;
  --ink: #241a10;
  --muted: #6f6252;
  --line: #d7c7b1;
  --accent: #9a3412;
  --accent-soft: #f5d7bf;
  --shadow: 0 18px 45px rgba(64, 38, 17, 0.09);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "PingFang SC", "Noto Serif SC", "Source Han Serif SC", serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top right, rgba(154, 52, 18, 0.08), transparent 28%),
    linear-gradient(180deg, #f7f0e3 0%, #f2eadc 100%);
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.shell { width: min(1180px, calc(100vw - 40px)); margin: 0 auto; padding: 24px 0 56px; }
.nav {
  display: flex; justify-content: space-between; gap: 20px; align-items: center;
  padding: 18px 22px; border: 1px solid var(--line); border-radius: 20px;
  background: rgba(255, 250, 240, 0.88); backdrop-filter: blur(10px);
  box-shadow: var(--shadow); position: sticky; top: 14px; z-index: 10;
}
.brand { font-size: 22px; font-weight: 700; }
.nav-sub, .subtitle, .lead, .meta, .section-head p, .quote-card cite, .side-note, .body-copy p, .mini-note p, .glossary-note { color: var(--muted); }
.nav-links { display: flex; gap: 16px; flex-wrap: wrap; }
.nav-links a { padding: 8px 12px; border-radius: 999px; }
.nav-links a:hover, .button.primary { background: var(--ink); color: #fff8f1; }
.hero {
  display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 24px; margin-top: 26px;
  padding: 34px; border-radius: 32px; border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(255, 250, 240, 0.98), rgba(242, 227, 205, 0.92));
  box-shadow: var(--shadow);
}
.kicker { display: inline-flex; padding: 6px 10px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); font-size: 12px; letter-spacing: 0.04em; text-transform: uppercase; }
h1 { margin: 16px 0 10px; font-size: clamp(34px, 5vw, 58px); line-height: 1.05; }
h2 { margin: 0; font-size: 30px; }
h3 { margin: 12px 0 8px; font-size: 22px; }
.chips, .meta { display: flex; gap: 10px; flex-wrap: wrap; }
.chip, .meta span {
  padding: 8px 12px; border-radius: 999px; background: rgba(255,255,255,0.75);
  border: 1px solid var(--line); font-size: 13px;
}
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 18px; }
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 18px; border-radius: 999px; border: 1px solid var(--line); background: rgba(255,255,255,0.72);
}
.hero-visual { display: grid; gap: 18px; }
.cover-box, .mini-note, .quote-card, .section-block, .card, .stat-card, .plate-frame {
  border: 1px solid var(--line); border-radius: 24px; background: rgba(255, 250, 240, 0.94); box-shadow: var(--shadow);
}
.cover-box { padding: 18px; }
.mini-note, .quote-card, .section-block, .stat-card { padding: 18px; }
.section { margin-top: 28px; }
.stats, .grid { display: grid; gap: 16px; }
.stats { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card { padding: 16px; transition: transform 160ms ease, box-shadow 160ms ease; }
.card:hover { transform: translateY(-4px); }
.thumb {
  aspect-ratio: 16 / 10; overflow: hidden; border-radius: 18px; background: #efe7d6;
  display: flex; align-items: center; justify-content: center; margin-bottom: 14px;
}
.thumb img { width: 100%; height: 100%; object-fit: contain; }
.section-head {
  display: flex; justify-content: space-between; gap: 16px; align-items: end; margin-bottom: 14px;
}
.quote-card blockquote { margin: 10px 0; font-size: 28px; line-height: 1.35; }
.chapter-layout, .concept-layout, .plate-layout {
  display: grid; grid-template-columns: minmax(0, 0.98fr) minmax(290px, 0.62fr); gap: 22px;
}
.content-stack, .side-stack { display: grid; gap: 18px; }
.body-copy p { margin: 0 0 14px; line-height: 1.78; }
.list { margin: 0; padding-left: 20px; line-height: 1.72; }
.reading-card {
  padding: 16px; border-radius: 18px; background: rgba(245, 235, 220, 0.78); border: 1px solid var(--line);
  margin-top: 14px;
}
.plate-frame { padding: 16px; }
.plate-frame img { border-radius: 16px; }
.footer-links { display: flex; justify-content: space-between; gap: 14px; margin-top: 18px; }
.footer-links a { padding: 12px 14px; border-radius: 16px; border: 1px solid var(--line); background: rgba(255,255,255,0.72); }
.glossary-table { width: 100%; border-collapse: collapse; }
.glossary-table th, .glossary-table td { padding: 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
@media (max-width: 980px) {
  .hero, .chapter-layout, .concept-layout, .plate-layout, .grid.cols-3, .stats { grid-template-columns: 1fr; }
}