:root{
  color-scheme:light;
  --paper:#f7f2e8;
  --paper-2:#fffaf2;
  --ink:#1f1a17;
  --muted:#675f59;
  --line:#d8c7ad;
  --line-strong:#b39264;
  --card:#fffdf8;
  --shadow:0 24px 60px rgba(78,57,27,.10);
  --strategy:#7b4f22;
  --ethics:#28594f;
  --governance:#7a2f33;
  --accent:#9b6b2d;
  --bg-a:radial-gradient(circle at top left, rgba(170,129,65,.16), transparent 34%);
  --bg-b:radial-gradient(circle at right 20%, rgba(40,89,79,.12), transparent 26%);
  --display:"Songti SC","Noto Serif CJK SC","STSong",serif;
  --ui:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--ui);
  color:var(--ink);
  background:var(--bg-a),var(--bg-b),linear-gradient(180deg,#f6efe3 0%,#fbf8f1 35%,#f4ecdf 100%);
  line-height:1.72;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.site-shell{width:min(1240px,calc(100vw - 40px));margin:0 auto}
.topbar{
  position:sticky;top:0;z-index:20;
  backdrop-filter:blur(14px);
  background:rgba(247,242,232,.86);
  border-bottom:1px solid rgba(179,146,100,.35);
}
.topbar-inner{
  width:min(1240px,calc(100vw - 40px));margin:0 auto;
  min-height:66px;display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.brand{
  display:flex;flex-direction:column;gap:2px;
}
.brand strong{font-family:var(--display);font-size:1.06rem;letter-spacing:.03em}
.brand span{font-size:.82rem;color:var(--muted)}
.nav-links{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}
.nav-links a{
  padding:8px 12px;border-radius:999px;border:1px solid rgba(179,146,100,.45);
  background:rgba(255,255,255,.55);font-size:.92rem
}
.hero{
  padding:54px 0 28px;
  display:grid;grid-template-columns:1.35fr .85fr;gap:28px;align-items:start;
}
.hero-copy,.hero-side,.panel,.content-card,.chapter-card,.concept-card,.plate-card,.glossary-item,.source-item-deep,.route-group,.chapter-nav,.concept-link-card{
  background:rgba(255,253,248,.82);
  border:1px solid rgba(179,146,100,.35);
  box-shadow:var(--shadow);
  border-radius:26px;
}
.hero-copy{padding:32px}
.hero-kicker,.section-kicker,.meta-kicker{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 12px;border-radius:999px;
  background:rgba(155,107,45,.10);border:1px solid rgba(155,107,45,.24);
  color:var(--accent);font-size:.82rem;font-weight:700;letter-spacing:.04em
}
.hero h1,.page-head h1{
  font-family:var(--display);font-size:clamp(2.1rem,4vw,3.5rem);line-height:1.16;
  margin:16px 0 14px;
}
.hero p{font-size:1rem;color:#312925}
.hero-meta{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.meta-chip{
  padding:8px 12px;border-radius:999px;background:#f1e3ca;border:1px solid rgba(179,146,100,.35);font-size:.88rem
}
.hero-side{padding:24px}
.hero-side img{
  width:100%;aspect-ratio:3/4;object-fit:contain;padding:18px;background:linear-gradient(180deg,#fbf7ef,#efe4d0);
  border-radius:22px;border:1px solid rgba(179,146,100,.26)
}
.hero-side h3{margin:18px 0 8px;font-family:var(--display);font-size:1.2rem}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:6px 0 36px}
.stat{padding:18px 18px 16px;background:rgba(255,255,255,.68);border-radius:22px;border:1px solid rgba(179,146,100,.26)}
.stat strong{display:block;font-family:var(--display);font-size:1.65rem}
.stat span{font-size:.9rem;color:var(--muted)}
.section{padding:10px 0 34px}
.section-head{display:flex;justify-content:space-between;gap:18px;align-items:end;margin-bottom:18px}
.section-head h2{font-family:var(--display);font-size:1.8rem;margin:12px 0 0}
.section-head p{max-width:760px;color:var(--muted);margin:0}
.volume-grid,.concept-grid,.plate-grid,.glossary-grid,.chapter-grid{display:grid;gap:16px}
.volume-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.chapter-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.concept-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.plate-grid{grid-template-columns:repeat(5,minmax(0,1fr))}
.glossary-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.panel{padding:22px}
.panel h3,.content-card h3,.content-card h2,.source-item-deep h4,.chapter-card h3,.concept-card h3,.plate-card h3{margin:0 0 10px}
.panel h3,.content-card h2,.content-card h3{font-family:var(--display)}
.panel p,.chapter-card p,.concept-card p,.plate-card p,.source-item-deep p,.content-card li{color:#403733}
.volume-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.volume-list a,.text-link{
  font-size:.9rem;padding:8px 12px;border-radius:999px;border:1px solid rgba(179,146,100,.32);background:#f8efe0
}
.chapter-card,.concept-card,.plate-card{padding:18px;display:flex;flex-direction:column;gap:10px;min-height:100%}
.chapter-card img,.concept-card img,.plate-card img{
  width:100%;aspect-ratio:4/3;object-fit:contain;border-radius:18px;padding:14px;background:#f3ede3;border:1px solid rgba(179,146,100,.18)
}
.chapter-card .meta,.concept-card .meta,.plate-card .meta{font-size:.82rem;color:var(--muted)}
.page-head{padding:36px 0 22px}
.pathline{display:flex;gap:8px;flex-wrap:wrap;font-size:.9rem;color:var(--muted)}
.page-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:22px;padding-bottom:40px}
.content-stack{display:flex;flex-direction:column;gap:18px}
.content-card{padding:24px}
.bullet-list,.check-list,.tag-list{padding-left:20px;margin:12px 0 0}
.tag-list{display:flex;flex-wrap:wrap;gap:10px;padding:0;list-style:none}
.tag-list li{padding:8px 12px;border-radius:999px;background:#efe3cc;border:1px solid rgba(179,146,100,.28);font-size:.88rem}
.deep-grid{display:grid;grid-template-columns:1fr;gap:14px}
.source-item-deep{padding:18px}
.source-item-deep .label{display:block;font-size:.78rem;color:var(--accent);font-weight:700;letter-spacing:.05em}
.aside-stack{display:flex;flex-direction:column;gap:16px;position:sticky;top:90px;align-self:start}
.viewer-main{padding:18px;border-radius:22px;background:#f4ebdd;border:1px solid rgba(179,146,100,.25)}
.viewer-main img{width:100%;aspect-ratio:4/5;object-fit:contain}
.thumbs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.thumbs button{
  border:0;background:none;padding:0;cursor:pointer
}
.thumbs img{
  width:100%;aspect-ratio:4/3;object-fit:contain;padding:10px;background:#f8f2e7;border-radius:16px;border:1px solid rgba(179,146,100,.24)
}
.route-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.route-group{padding:16px}
.route-group h4{margin:0 0 10px;font-family:var(--display)}
.related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.concept-link-card{padding:16px}
.chapter-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;padding:18px}
.chapter-nav a{padding:14px;border-radius:18px;background:#f8efe0;border:1px solid rgba(179,146,100,.24)}
.qa details{border:1px solid rgba(179,146,100,.26);background:#fbf6ed;border-radius:18px;padding:14px}
.qa summary{cursor:pointer;font-weight:700}
.plate-full{width:100%;padding:18px;background:#fbf6ed;border:1px solid rgba(179,146,100,.26);border-radius:24px;object-fit:contain}
.glossary-search{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}
.glossary-search input{
  width:min(420px,100%);padding:12px 14px;border-radius:14px;border:1px solid rgba(179,146,100,.35);background:#fffdfa;
  font:inherit
}
.glossary-item{padding:18px}
.glossary-item h3{font-family:var(--display);font-size:1.1rem}
.footer{padding:18px 0 44px;color:var(--muted);font-size:.9rem}
.tone-strategy{border-left:6px solid var(--strategy)}
.tone-ethics{border-left:6px solid var(--ethics)}
.tone-governance{border-left:6px solid var(--governance)}
@media (max-width:1100px){
  .hero,.page-layout{grid-template-columns:1fr}
  .aside-stack{position:static}
  .volume-grid,.concept-grid,.glossary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .plate-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (max-width:720px){
  .site-shell,.topbar-inner{width:min(100vw - 24px,1240px)}
  .hero-copy,.hero-side,.content-card,.panel,.chapter-card,.concept-card,.plate-card,.glossary-item,.source-item-deep,.chapter-nav{border-radius:20px}
  .stats,.volume-grid,.chapter-grid,.concept-grid,.plate-grid,.glossary-grid,.route-grid,.related-grid{grid-template-columns:1fr}
  .nav-links{justify-content:flex-start}
  .hero{padding-top:28px}
}