:root{
  --bg:#f3f0ea;
  --paper:#fffdf9;
  --panel:#fffaf3;
  --line:#d8cfbf;
  --text:#261f17;
  --muted:#675f56;
  --accent:#8b5d36;
  --accent-2:#2f6772;
  --shadow:0 18px 42px rgba(53,36,18,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei",sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at top left, rgba(139,93,54,.12), transparent 24rem),
    radial-gradient(circle at top right, rgba(47,103,114,.12), transparent 22rem),
    linear-gradient(180deg,#faf7f2,var(--bg));
  line-height:1.78;
}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
.topbar{position:sticky;top:0;z-index:10;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 18px;background:rgba(255,252,247,.88);backdrop-filter:blur(12px);border-bottom:1px solid rgba(38,31,23,.08)}
.topbar nav{display:flex;gap:10px;flex-wrap:wrap}
.topbar nav a{padding:8px 12px;border-radius:999px;color:var(--muted)}
.topbar nav a:hover,.topbar nav a.active{background:var(--paper);color:var(--text)}
.brand{font-weight:800;letter-spacing:.02em}
main{max-width:1280px;margin:0 auto;padding:28px 18px 72px}
.hero,.hero-book,.panel,.card{background:rgba(255,253,249,.93);border:1px solid rgba(216,207,191,.92);border-radius:28px;box-shadow:var(--shadow)}
.hero{display:grid;grid-template-columns:1.2fr .9fr;gap:24px;padding:30px;margin-bottom:22px}
.hero-book{display:grid;grid-template-columns:280px 1fr;gap:24px;padding:26px;margin-bottom:22px}
.hero h1,.hero-book h1{margin:0 0 12px;font-size:clamp(2rem,4vw,3.4rem);line-height:1.06}
.hero p,.hero-book p,.card p,.panel p,.panel li{color:var(--muted)}
.tag-row,.chip-row{display:flex;gap:10px;flex-wrap:wrap}
.tag,.chip{display:inline-flex;padding:8px 12px;border-radius:999px;font-size:.92rem;font-weight:700}
.tag{background:rgba(139,93,54,.12);color:var(--accent)}
.chip{background:rgba(47,103,114,.12);color:var(--accent-2)}
.button,.ghost{display:inline-flex;align-items:center;gap:8px;padding:11px 15px;border-radius:999px;font-weight:700}
.button{background:linear-gradient(135deg,var(--accent),#b57a4a);color:#fff}
.ghost{border:1px solid var(--line);background:var(--paper)}
.metric-grid,.grid,.plate-grid{display:grid;gap:16px}
.metric-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
.metric,.panel,.card{padding:20px}
.metric{background:var(--paper);border:1px solid var(--line);border-radius:22px}
.metric strong{display:block;font-size:1.9rem}
.section-title{margin:28px 0 12px;font-size:1.55rem}
.section-note{margin-top:-4px;color:var(--muted)}
.grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:20px}
.sticky{position:sticky;top:84px;display:flex;flex-direction:column;gap:14px}
.chapter-card-figure,.plate-thumb,.thumb-frame{display:block;background:#f7f1e6;border:1px solid var(--line);border-radius:22px;padding:12px;overflow:hidden}
.chapter-card-figure img,.plate-thumb img,.thumb-frame img{width:100%;aspect-ratio:1.35/1;object-fit:contain;background:#fff}
.chapter-card h2,.card h2,.panel h2,.panel h3{margin:0 0 10px}
.mini-list,.route-list,.plain-list{display:grid;gap:8px;padding-left:18px}
.deep-card{padding:16px;border-radius:18px;border:1px solid var(--line);background:var(--paper);margin:12px 0}
.deep-card h3{margin:0 0 10px;font-size:1.08rem}
.plate-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.plate-detail{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:20px}
.plate-hero{background:var(--paper);border:1px solid var(--line);border-radius:24px;padding:18px}
.plate-hero img{width:100%;max-height:76vh;object-fit:contain;background:#fff}
.search{width:100%;padding:13px 14px;border-radius:18px;border:1px solid var(--line);background:var(--paper);font-size:1rem}
.glossary-row{display:grid;grid-template-columns:1.15fr .95fr 2fr;gap:16px;padding:16px 18px;border-radius:18px;border:1px solid var(--line);background:var(--paper)}
.pager{display:flex;justify-content:space-between;gap:12px;margin-top:24px}
.pager a{flex:1}
details{padding:16px 18px;border-radius:18px;border:1px solid var(--line);background:var(--paper)}
summary{cursor:pointer;font-weight:800}
@media (max-width: 980px){
  .hero,.hero-book,.layout,.plate-detail{grid-template-columns:1fr}
  .grid{grid-template-columns:1fr 1fr}
  .metric-grid{grid-template-columns:1fr 1fr}
  .sticky{position:static}
}
@media (max-width: 700px){
  .topbar{align-items:flex-start;flex-direction:column}
  .grid,.plate-grid,.metric-grid,.glossary-row{grid-template-columns:1fr}
  .hero,.hero-book,.metric,.card,.panel{padding:18px}
  main{padding:18px 14px 56px}
}