:root{
  --bg:#f4f1ea;
  --panel:#fffdf8;
  --line:#d9d0c2;
  --ink:#231f1a;
  --muted:#6d6357;
  --accent:#395d74;
  --accent-soft:#dbe7ee;
  --danger:#824f43;
  --shadow:0 12px 32px rgba(41,34,28,.08);
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","PingFang SC","Hiragino Sans GB","Noto Sans CJK SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.topbar{position:sticky;top:0;z-index:20;display:flex;justify-content:space-between;align-items:center;padding:14px 24px;background:rgba(244,241,234,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.brand{font-weight:700}
.toplinks{display:flex;gap:16px;flex-wrap:wrap}
.toplinks a{padding:6px 0;color:var(--muted)}
.toplinks a.active,.toplinks a:hover{color:var(--accent)}
.page{max-width:1260px;margin:0 auto;padding:28px 24px 56px}
.hero,.detail-hero{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(280px,.9fr);gap:24px;align-items:stretch;margin-bottom:28px}
.hero-copy,.hero-panel,.panel,.reading-card,.detail-main,.detail-side{background:var(--panel);border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow)}
.hero-copy{padding:28px}
.hero-panel{padding:18px;display:flex;flex-direction:column;gap:16px}
.hero-panel img{border-radius:6px;aspect-ratio:3/4;object-fit:cover;background:#efe7da}
.eyebrow{margin:0 0 8px;color:var(--accent);font-size:12px;font-weight:700;letter-spacing:.04em;text-transform:uppercase}
h1,h2,h3,p{margin-top:0}
h1{font-size:40px;line-height:1.08;margin-bottom:14px}
h2{font-size:24px;margin-bottom:12px}
h3{font-size:18px;margin-bottom:10px}
.lead{font-size:18px;color:#3a322c}
.hero-actions,.stack-buttons{display:flex;flex-wrap:wrap;gap:12px}
.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 14px;border:1px solid var(--line);border-radius:8px;background:#fff;min-height:44px}
.button.primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.button.loose{justify-content:flex-start;width:100%}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.stats div{padding:12px;border-radius:8px;background:var(--accent-soft)}
.stats strong{display:block;font-size:24px}
.stats span{font-size:13px;color:var(--muted)}
.section{margin-top:34px}
.section-head{display:flex;justify-content:space-between;gap:16px;align-items:end;margin-bottom:16px}
.section-head p{max-width:720px;color:var(--muted)}
.split-panel{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.panel,.reading-card{padding:20px}
.front-list,.bullet-list,.route-list{margin:0;padding-left:18px}
.front-list li{display:grid;gap:4px;margin-bottom:12px}
.chapter-grid,.route-grid,.plate-grid{display:grid;gap:16px}
.chapter-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.route-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.plate-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.chapter-card,.route-card,.plate-card{background:var(--panel);border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow);overflow:hidden}
.chapter-card,.route-card{padding:18px}
.chapter-card span,.route-card span{display:block;font-size:12px;color:var(--muted);margin-bottom:8px}
.chapter-card strong,.route-card strong{display:block;font-size:18px;margin-bottom:8px}
.plate-card img{aspect-ratio:4/3;object-fit:cover;background:#ece5db}
.plate-card div{padding:14px}
.detail-page .detail-hero{grid-template-columns:1fr}
.detail-board{display:grid;grid-template-columns:minmax(0,1.6fr) 360px;gap:18px}
.detail-main,.detail-side{padding:0;background:transparent;border:none;box-shadow:none}
.detail-main{display:grid;gap:16px}
.detail-side{display:grid;gap:16px;align-content:start}
.reading-card.thesis{border-color:#bcd0dc}
.deep-grid{display:grid;gap:12px}
.deep-card{padding:14px;border:1px solid var(--line);border-radius:8px;background:#fff}
.snippet{color:var(--muted)}
.quiz-toggle{width:100%;padding:14px;border:1px solid var(--line);border-radius:8px;background:#fff;text-align:left;font:inherit;cursor:pointer}
.quiz-answer{margin-top:12px;padding:14px;border-radius:8px;background:var(--accent-soft)}
.plate-sidebar,.mini-plate-grid{display:grid;gap:12px}
.plate-sidebar-card,.mini-plate{display:grid;grid-template-columns:88px 1fr;gap:12px;align-items:center;padding:10px;border:1px solid var(--line);border-radius:8px;background:#fff}
.plate-sidebar-card img,.mini-plate img{width:88px;height:64px;object-fit:cover;border-radius:6px;background:#ece5db}
.mini-plate-grid{grid-template-columns:1fr}
.plate-group + .plate-group{margin-top:12px}
.learn-nav{display:flex;justify-content:space-between;gap:12px}
.learn-nav a,.learn-nav span{display:inline-flex;min-height:44px;align-items:center;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--muted)}
.muted{color:var(--muted)}
.danger li{color:var(--danger)}
.plate-figure{margin:0;padding:16px;background:var(--panel);border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow)}
.plate-figure img{width:100%;border-radius:6px;background:#ece5db}
.concept-note{margin:8px 0 0;color:var(--muted);font-size:14px}
.table-wrap{overflow:auto;background:var(--panel);border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow)}
.glossary-table{width:100%;border-collapse:collapse}
.glossary-table th,.glossary-table td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.glossary-table th{background:#efe7da}
@media (max-width:980px){
  .hero,.split-panel,.detail-board,.chapter-grid,.route-grid,.plate-grid{grid-template-columns:1fr}
  .topbar{padding:12px 16px}
  .page{padding:22px 16px 48px}
  h1{font-size:32px}
}