:root{
  --bg:#071017;
  --bg-2:#0e1821;
  --paper:#f4efe6;
  --paper-2:#fffaf2;
  --ink:#11161c;
  --text:#d9e4ee;
  --muted:#93a6b5;
  --line:rgba(201,218,232,.12);
  --accent:#76d8ff;
  --accent-2:#ffca72;
  --accent-3:#8ce5c0;
  --card:rgba(12,22,31,.88);
  --card-2:rgba(18,30,42,.94);
  --shadow:0 18px 40px rgba(0,0,0,.28);
  --radius:22px;
  --radius-sm:16px;
  --content:1220px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Noto Sans CJK SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  background:
    radial-gradient(circle at 18% 18%, rgba(118,216,255,.10), transparent 22%),
    radial-gradient(circle at 82% 6%, rgba(255,202,114,.12), transparent 18%),
    linear-gradient(180deg,var(--bg) 0%, #09131b 55%, #060d12 100%);
  color:var(--text);
  line-height:1.72;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.shell{max-width:var(--content);margin:0 auto;padding:24px 20px 80px}
.topbar{
  position:sticky;top:0;z-index:9;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:16px 0 12px;backdrop-filter:blur(14px)
}
.brand{display:flex;align-items:center;gap:12px;font-weight:700;letter-spacing:.03em}
.brand-mark{
  width:42px;height:42px;border-radius:14px;display:grid;place-items:center;
  background:linear-gradient(135deg,#0d3d56,#091923);border:1px solid rgba(118,216,255,.22);
  box-shadow:var(--shadow);font-size:18px;color:#e7f8ff
}
.nav{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}
.nav a{
  padding:9px 14px;border-radius:999px;border:1px solid var(--line);
  background:rgba(255,255,255,.03);font-size:14px;color:#c4d3df
}
.hero{
  display:grid;grid-template-columns:minmax(0,1.25fr) minmax(300px,.75fr);gap:26px;
  padding:34px;border-radius:30px;border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(14,24,33,.96),rgba(10,18,26,.94));
  box-shadow:var(--shadow);overflow:hidden
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;
  background:rgba(118,216,255,.08);color:var(--accent);font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase
}
.hero-copy h1{
  margin:10px 0 12px;font-size:clamp(34px,5vw,60px);line-height:1.06;letter-spacing:0
}
.subtitle{font-size:18px;color:#bdd0dc;max-width:62ch}
.hero-meta,.mini-tags,.concept-tags,.plate-tags{display:flex;gap:10px;flex-wrap:wrap}
.chip,.mini-tags span,.concept-tags span,.plate-tags span{
  display:inline-flex;align-items:center;padding:7px 11px;border-radius:999px;
  background:rgba(255,255,255,.06);font-size:13px;color:#d4e5f1;border:1px solid rgba(255,255,255,.04)
}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.button{
  display:inline-flex;align-items:center;justify-content:center;padding:12px 18px;border-radius:999px;
  border:1px solid var(--line);background:rgba(255,255,255,.04);font-weight:700;color:#e6f1f9
}
.button.primary{background:linear-gradient(135deg,#79dfff,#21465e);border:none;color:#03131d}
.hero-side{display:grid;gap:16px}
.cover-card,.aside-card,.callout,.grid-card,.section-card,.plate-card,.glossary-card,.stats,.path-card,.reading-card,.concept-card,.quote-card,.question-card{
  background:var(--card);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)
}
.cover-card{padding:18px}
.cover-card img{
  width:100%;aspect-ratio:4/5;object-fit:contain;background:linear-gradient(180deg,#f9f5ed,#f3ebde);
  border-radius:16px;padding:16px
}
.cover-card small,.muted{color:var(--muted)}
.stats{
  margin-top:22px;padding:18px;display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:14px
}
.stat strong{display:block;font-size:26px;color:#f2f8ff}
.section{margin-top:28px}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:16px}
.section-head h2{margin:0;font-size:30px}
.section-head p{margin:0;color:#abc0cf;max-width:62ch}
.grid{display:grid;gap:18px}
.grid.cols-3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.grid.cols-4{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.grid-card,.concept-card,.plate-card,.reading-card,.path-card{padding:18px}
.grid-card h3,.concept-card h3,.plate-card h3,.reading-card h3,.path-card h3{margin:8px 0 10px;font-size:22px}
.kicker{font-size:12px;letter-spacing:.09em;text-transform:uppercase;color:var(--accent);font-weight:800}
.thumb{
  width:100%;aspect-ratio:4/3;border-radius:18px;background:linear-gradient(180deg,#111d27,#0b141d);
  padding:12px;display:grid;place-items:center;overflow:hidden;border:1px solid rgba(255,255,255,.05)
}
.thumb img{width:100%;height:100%;object-fit:contain}
.grid-card p,.concept-card p,.plate-card p,.reading-card p,.path-card p,.aside-card p{margin:0;color:#d9e3ec}
.page-grid{
  margin-top:24px;display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:26px
}
.page-main{display:grid;gap:20px}
.page-side{display:grid;gap:18px;align-content:start}
.quote-card,.question-card,.aside-card,.callout{padding:18px}
.callout{
  background:linear-gradient(135deg,rgba(118,216,255,.08),rgba(18,30,42,.96))
}
.bullets{margin:0;padding-left:18px}
.bullets li{margin:8px 0}
.route-list{display:grid;gap:12px}
.route-link{
  display:flex;justify-content:space-between;gap:16px;padding:14px 16px;border-radius:18px;
  background:rgba(255,255,255,.03);border:1px solid rgba(118,216,255,.10)
}
.two-col{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.question-card details{cursor:pointer}
.question-card summary{font-weight:800;font-size:18px}
.question-card .answer{margin-top:12px;color:#dbe8f1}
.path-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.plate-viewer{display:grid;gap:12px}
.plate-mini{
  display:grid;grid-template-columns:90px minmax(0,1fr);gap:12px;align-items:center;padding:10px;
  border-radius:18px;background:rgba(255,255,255,.035);border:1px solid rgba(255,255,255,.05)
}
.plate-mini .mini-thumb{
  width:90px;height:72px;border-radius:12px;background:#f2eadb;padding:8px;display:grid;place-items:center
}
.plate-mini .mini-thumb img{width:100%;height:100%;object-fit:contain}
.plate-figure{
  padding:18px;background:rgba(255,255,255,.03);border-radius:24px;border:1px solid rgba(255,255,255,.07)
}
.plate-figure img{
  width:100%;max-height:76vh;object-fit:contain;background:#fcf6ea;padding:16px;border-radius:18px
}
.plate-breakdown{display:grid;gap:12px}
.glossary-list{display:grid;gap:14px}
.glossary-card{padding:16px 18px}
.glossary-card strong{font-size:22px;color:#f4f8fd}
.glossary-card em{font-style:normal;color:var(--accent);font-weight:700}
.footer{
  margin-top:42px;padding-top:24px;border-top:1px solid rgba(255,255,255,.08);color:var(--muted);font-size:14px
}
.search-wrap{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.search{
  width:min(440px,100%);padding:13px 16px;border-radius:14px;border:1px solid rgba(255,255,255,.10);
  background:rgba(255,255,255,.05);font:inherit;color:#f0f6fb
}
.search::placeholder{color:#91a5b4}
.hidden{display:none !important}
.paper-note{
  padding:14px 16px;border-radius:18px;background:linear-gradient(180deg,#f8f1e4,#f1e6d4);
  color:#25313a;border:1px solid rgba(17,22,28,.08)
}
.code-strip{
  display:flex;gap:12px;flex-wrap:wrap;margin-top:14px
}
.code-strip span{
  padding:8px 10px;border-radius:12px;background:rgba(255,255,255,.04);border:1px dashed rgba(118,216,255,.16);
  font-size:13px;color:#cde2ee
}
@media (max-width: 960px){
  .hero,.page-grid{grid-template-columns:1fr}
  .nav{justify-content:flex-start}
  .topbar{position:static}
}