:root{
  --bg:#f5fbfb;
  --paper:#ffffff;
  --paper-2:#fffef8;
  --ink:#111a1f;
  --muted:#677b82;
  --line:#d9e7e7;
  --accent:#2cb3c5;
  --accent-2:#e0c620;
  --soft:#eaf7f8;
  --shadow:0 18px 42px rgba(11,35,42,.08);
  --radius:24px;
  --radius-sm:16px;
  --content:1200px;
}
*{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;
  color:var(--ink);
  background:
    radial-gradient(circle at 15% 10%, rgba(44,179,197,.14), transparent 24%),
    radial-gradient(circle at 88% 8%, rgba(224,198,32,.14), transparent 18%),
    linear-gradient(180deg,#f5fbfb 0%, #eff7f7 100%);
  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 76px}
.topbar{
  display:flex;gap:14px;align-items:center;justify-content:space-between;
  position:sticky;top:0;z-index:9;padding:18px 0 12px;
  backdrop-filter: blur(12px);
}
.brand{display:flex;gap:12px;align-items:center;font-weight:700;letter-spacing:.03em}
.brand-mark{
  width:42px;height:42px;border-radius:14px;
  background:linear-gradient(135deg,var(--accent),#125868);
  color:#fff;display:grid;place-items:center;font-size:18px;box-shadow:var(--shadow);
}
.nav{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}
.nav a{
  padding:9px 14px;border:1px solid rgba(17,26,31,.08);border-radius:999px;
  background:rgba(255,255,255,.76);font-size:14px;color:var(--muted)
}
.hero{
  display:grid;grid-template-columns:minmax(0,1.28fr) minmax(280px,.72fr);gap:28px;
  padding:34px;border:1px solid rgba(17,26,31,.08);border-radius:32px;
  background:rgba(255,255,255,.92);box-shadow:var(--shadow);overflow:hidden;
}
.hero-copy h1{
  margin:10px 0 12px;font-size:clamp(34px,5vw,58px);line-height:1.08;letter-spacing:0
}
.eyebrow{
  display:inline-flex;gap:8px;align-items:center;padding:8px 12px;border-radius:999px;
  background:rgba(44,179,197,.10);color:#13899a;font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.08em
}
.subtitle{font-size:18px;color:var(--muted);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:#eef8f9;color:#33443d;font-size:13px
}
.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 rgba(17,26,31,.10);background:#fff;box-shadow:var(--shadow);font-weight:700
}
.button.primary{background:linear-gradient(135deg,var(--accent),#125868);color:#fff;border:none}
.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:rgba(255,255,255,.95);border:1px solid rgba(17,26,31,.08);border-radius:24px;box-shadow:var(--shadow);
}
.cover-card{padding:18px}
.cover-card img{
  width:100%;aspect-ratio:4/5;object-fit:contain;background:#f6fbfb;border-radius:18px;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}
.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:var(--muted);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:#13899a;font-weight:800}
.thumb{
  width:100%;aspect-ratio:4/3;border-radius:18px;background:linear-gradient(180deg,#f8fcfc,#eef5f5);padding:12px;display:grid;place-items:center;overflow:hidden;border:1px solid rgba(17,26,31,.06)
}
.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:#314039}
.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(44,179,197,.09),rgba(255,254,248,.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:#f2fafb;border:1px solid rgba(44,179,197,.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:#2f4139}
.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:#f7fcfc;border:1px solid rgba(17,26,31,.06)
}
.plate-mini .mini-thumb{
  width:90px;height:72px;border-radius:12px;background:#fcfbf5;padding:8px;display:grid;place-items:center
}
.plate-mini .mini-thumb img{width:100%;height:100%;object-fit:contain}
.plate-figure{
  padding:18px;background:#f8fcfc;border-radius:24px;border:1px solid rgba(17,26,31,.08)
}
.plate-figure img{width:100%;max-height:76vh;object-fit:contain;background:#fffef8;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}
.glossary-card em{font-style:normal;color:#13899a;font-weight:700}
.footer{
  margin-top:42px;padding-top:24px;border-top:1px solid rgba(17,26,31,.10);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(17,26,31,.12);background:#fff;font:inherit
}
.hidden{display:none !important}
.paper-note{
  margin-top:18px;padding:16px 18px;border-radius:20px;background:linear-gradient(180deg,#fffdf7,#f8f2df);
  border:1px solid rgba(17,26,31,.06)
}
.visual-strip{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:18px
}
.visual-card{
  display:grid;gap:8px;padding:12px;border-radius:18px;background:#f7fcfc;border:1px solid rgba(17,26,31,.06)
}
.visual-card img{width:100%;aspect-ratio:4/3;object-fit:contain;background:#fffef8;border-radius:14px;padding:10px}
.visual-card span{font-weight:700}
.visual-card small{color:var(--muted)}
@media (max-width: 960px){
  .hero,.page-grid{grid-template-columns:1fr}
  .nav{justify-content:flex-start}
  .topbar{position:static}
  .visual-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
}