:root{
  --bg:#f6f2e8;
  --paper:#fffaf2;
  --ink:#221b16;
  --muted:#6e645b;
  --line:#d8cdbf;
  --accent:#b95c2f;
  --accent-soft:#f2dfd1;
  --olive:#667254;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--ink);line-height:1.65}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.site-shell{min-height:100vh}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:18px 28px;border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(246,242,232,.92);backdrop-filter:blur(10px);z-index:10}
.brand{font-weight:700}
.topnav{display:flex;gap:18px;color:var(--muted);font-size:14px}
.page{max-width:1280px;margin:0 auto;padding:28px}
.hero,.detail-hero{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:start}
.hero{padding:18px 0 28px}
.hero-copy,.hero-visual,.content-block,.chapter-card,.concept-card,.plate-card,.viewer-panel,.source-item-deep,.small-card{background:var(--paper);border:1px solid var(--line);border-radius:8px}
.hero-copy{padding:28px}
.hero-visual{padding:18px}
.media-frame{display:flex;align-items:center;justify-content:center;background:#f5eee1;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.media-frame img{max-width:100%;max-height:100%;object-fit:contain}
.hero-cover,
.hero-cover-frame{aspect-ratio:4/5;padding:18px;background:
linear-gradient(180deg,#fbf7f1 0%,#efe3d3 100%)}
.hero-grid{margin-top:12px;display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.hero-grid img,
.hero-grid-frame{aspect-ratio:1.3/1;padding:10px}
.hero-cover{width:100%;object-fit:contain;border-radius:6px;border:1px solid var(--line)}
.hero-grid img{width:100%;object-fit:contain;border-radius:6px;border:1px solid var(--line);background:#f7f0e4}
.eyebrow{font-size:12px;color:var(--accent);text-transform:uppercase;letter-spacing:.08em}
h1,h2,h3,h4,p,ul,ol{margin-top:0}
h1{font-size:40px;line-height:1.12;margin-bottom:14px}
h2{font-size:24px;margin-bottom:12px}
h3{font-size:18px;margin-bottom:10px}
.hero-lead{font-size:18px;color:#43372e}
.hero-points,.bullet-list,.ordered-points{padding-left:20px;margin-bottom:0}
.section-band{margin-top:30px}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:16px;margin-bottom:16px}
.section-head h2{margin-bottom:0;max-width:780px}
.inline-link{color:var(--accent);font-weight:600}
.card-grid{display:grid;gap:16px}
.chapter-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.concept-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.chapter-card,.concept-card,.plate-card,.small-card{padding:18px;height:100%}
.chapter-card p,.concept-card p,.small-card p,.plate-meta p{color:var(--muted);font-size:14px}
.plate-showcase{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.card-grid > *,.plate-showcase > *{height:100%}
.plate-card{padding:0;overflow:hidden;display:flex;flex-direction:column;height:100%}
.plate-card img,
.plate-thumb{aspect-ratio:1.18/1;padding:14px;border:none;border-bottom:1px solid var(--line);border-radius:0;background:
linear-gradient(180deg,#fdfaf4 0%,#efe4d5 100%)}
.plate-card img{width:100%;object-fit:contain}
.plate-meta{padding:14px;display:flex;flex-direction:column;gap:8px;flex:1;justify-content:flex-start}
.plate-meta h3{margin-bottom:0}
.detail-layout{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:20px;align-items:start}
.detail-main,.only-main{display:flex;flex-direction:column;gap:16px}
.detail-side{position:sticky;top:88px}
.content-block{padding:22px}
.viewer-panel{padding:18px}
.viewer-main{width:100%;aspect-ratio:1/1;object-fit:contain;background:#efe6d8;border:1px solid var(--line);border-radius:6px}
.thumb-strip{display:flex;flex-direction:column;gap:10px;margin-top:12px}
.thumb-button{display:grid;grid-template-columns:72px 1fr;gap:10px;align-items:center;padding:8px;background:#fff;border:1px solid var(--line);border-radius:6px;text-align:left;cursor:pointer}
.thumb-button img,
.thumb-frame{width:72px;height:72px;padding:6px;border-radius:4px}
.thumb-button img{object-fit:contain;background:#f5eee1}
.source-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.source-item-deep{padding:16px}
.source-item-deep p{font-size:14px;color:#473d36;margin-bottom:8px}
.plate-group + .plate-group{margin-top:16px}
.mini-plate-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.mini-plate{display:block;background:#fff;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.mini-plate img,
.mini-thumb{aspect-ratio:1.3/1;padding:10px;border:none;border-bottom:1px solid var(--line);border-radius:0;background:#f7f0e5}
.mini-plate img{width:100%;object-fit:contain}
.mini-plate span{display:block;padding:10px;font-size:13px}
.answer-button,.filter-button{padding:10px 14px;border-radius:999px;border:1px solid var(--line);background:#fff;cursor:pointer}
.answer-panel{margin-top:12px;padding:14px;border-radius:6px;background:var(--accent-soft)}
.pager{display:flex;justify-content:space-between;gap:12px}
.pager a{padding:12px 14px;border:1px solid var(--line);border-radius:6px;background:#fff;flex:1}
.small-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.filter-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:16px}
.filter-button.active{background:var(--olive);color:#fff;border-color:var(--olive)}
.full-plate{width:100%;max-height:720px;object-fit:contain;background:#f3ebde;border:1px solid var(--line);border-radius:6px}
.concept-expand-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;padding-left:18px}
.glossary-table{width:100%;border-collapse:collapse;background:var(--paper);border:1px solid var(--line);border-radius:8px;overflow:hidden}
.glossary-table th,.glossary-table td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.glossary-table th{background:#efe6d8}
@media (max-width:1100px){
  .chapter-grid,.concept-grid,.plate-showcase{grid-template-columns:repeat(2,minmax(0,1fr))}
  .detail-layout,.hero,.detail-hero{grid-template-columns:1fr}
  .detail-side{position:static}
}
@media (max-width:720px){
  .topbar{padding:14px 16px;flex-direction:column;align-items:flex-start;gap:10px}
  .page{padding:18px}
  h1{font-size:30px}
  .chapter-grid,.concept-grid,.plate-showcase,.source-grid,.mini-plate-grid,.concept-expand-list,.small-grid{grid-template-columns:1fr}
}