:root{
  --bg:#f4ecdf;--card:#fffaf2;--line:#dfcfbc;--ink:#1f3043;--muted:#5b6776;--accent:#a45333;--shadow:rgba(63,42,18,.12);--sidebar:#f1e6d6
}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;color:var(--ink);background:radial-gradient(circle at 15% 8%, rgba(215,175,120,.24), transparent 18%),radial-gradient(circle at 90% 10%, rgba(98,140,174,.12), transparent 18%),linear-gradient(180deg,#f9f3e7 0%,#f4ecdf 55%,#efe6d7 100%)}
a{color:inherit}img{display:block;max-width:100%}
.site-shell{min-height:100vh;display:grid;grid-template-columns:320px minmax(0,1fr)}
.sidebar{position:sticky;top:0;align-self:start;height:100vh;padding:34px 24px 28px;background:linear-gradient(180deg,rgba(255,250,243,.96),rgba(240,228,212,.96));border-right:1px solid var(--line);backdrop-filter:blur(16px)}
.brand-mark{font-size:12px;letter-spacing:.28em;color:var(--accent);margin-bottom:10px}
.brand h1{margin:0 0 10px;font-size:38px;line-height:1.05}.brand p{margin:0;color:var(--muted);line-height:1.75;font-size:14px}
.sidebar-toggle{display:none;width:100%;margin:18px 0 8px;padding:12px 14px;border:none;border-radius:999px;background:linear-gradient(135deg,var(--accent),#c97953);color:#fff;font-size:15px}
.nav{display:flex;flex-direction:column;gap:10px;margin-top:26px}
.nav-link{display:block;padding:13px 16px;border-radius:16px;text-decoration:none;color:var(--muted);border:1px solid transparent;transition:.25s ease}
.nav-link:hover,.nav-link.active{color:var(--ink);background:rgba(255,250,243,.85);border-color:var(--line);transform:translateX(4px)}
.sidebar-foot{display:grid;gap:10px;margin-top:28px}.sidebar-badge{padding:10px 12px;border-radius:14px;background:rgba(255,250,243,.82);border:1px solid var(--line);color:var(--muted);font-size:13px}
.page-main{padding:38px 42px 68px}.section{margin-top:30px}.section-head{margin-bottom:18px;max-width:980px}.section-head h2{margin:0 0 8px;font-size:38px;line-height:1.14}.section-head p{margin:0;color:var(--muted);line-height:1.92;font-size:16px}
.eyebrow{display:inline-block;color:var(--accent);letter-spacing:.18em;font-size:12px;text-transform:uppercase;margin-bottom:10px}
.panel{background:rgba(255,250,242,.94);border:1px solid var(--line);border-radius:28px;padding:26px;box-shadow:0 18px 36px var(--shadow)}
.hero-grid,.dual-columns,.hero-banner,.cases-layout,.detail-card,.formula-card,.knowledge-block{display:grid;gap:22px}
.hero-grid{grid-template-columns:1.2fr 1fr}.dual-columns{grid-template-columns:1fr 1fr}.hero-banner{grid-template-columns:1.1fr 1fr;align-items:center}
.hero-copy h2{margin:0 0 12px;font-size:52px;line-height:1.05}.lead{margin:0;color:var(--muted);line-height:1.95;font-size:17px}
.system-steps,.stats-grid,.feature-grid,.mini-case-grid,.narrative-grid,.formula-grid,.stack-list,.cases-list,.glossary-grid,.agent-panel{display:grid;gap:14px}
.system-steps{grid-template-columns:repeat(2,minmax(0,1fr));margin-top:22px}.system-steps div,.feature-card,.metric-explainer,.mini-case-card,.narrative-card,.glossary-grid div{background:rgba(255,248,238,.92);border:1px solid var(--line);border-radius:20px}
.system-steps div,.feature-card,.narrative-card,.mini-case-card,.metric-explainer,.glossary-grid div{padding:18px}
.system-steps strong{display:block;margin-bottom:8px;font-size:17px}.system-steps span,.feature-card p,.mini-case-card p,.narrative-card p,.metric-explainer p,.glossary-grid span,.agent-note,.subtitle-text{color:var(--muted);line-height:1.84}
.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr));margin-top:18px}.stat-card{padding:16px;border-radius:18px;background:#f6eee1;border:1px solid var(--line)}.stat-card span{display:block;color:var(--muted);font-size:13px;margin-bottom:6px}.stat-card strong{font-size:30px;color:var(--accent)}
.feature-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.mini-case-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.narrative-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.formula-grid{grid-template-columns:1fr}
.feature-card h3,.mini-case-card h3,.narrative-card h3,.formula-card h3,.knowledge-copy h3,.detail-copy h3{margin:0 0 10px;font-size:26px;line-height:1.25}
.constellation-panel{padding:18px}#constellation-canvas{width:100%;height:auto;border-radius:24px;border:1px solid var(--line);background:radial-gradient(circle at center,rgba(255,248,237,.94),rgba(244,234,219,.98))}
.constellation-legend{display:flex;flex-wrap:wrap;gap:14px;padding:14px 6px 0;color:var(--muted)}.legend-dot{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:7px}.legend-dot.evidence{background:#d39d5f}.legend-dot.prior{background:#a45333}.legend-dot.case{background:#6f8fa8}.legend-dot.flow{background:#8c699f}
.mini-case-card,.formula-card,.knowledge-block,.detail-card{grid-template-columns:1fr 1.05fr;gap:18px;align-items:center}.gallery-image,.hero-banner img{width:100%;border-radius:20px;border:1px solid #dfd3c2;background:#fff;cursor:zoom-in}
.chip{display:inline-flex;padding:8px 12px;border-radius:999px;background:#f6ead9;color:var(--accent);font-size:12px;letter-spacing:.08em;margin-bottom:10px}
.text-link{display:inline-block;margin-top:14px;color:var(--accent);font-weight:700;text-decoration:none}
.formula-card{padding:22px}.formula-block{padding:16px 18px;margin:14px 0 16px;border-radius:18px;background:#f8efe2;overflow:auto;font-size:22px}
.dict-grid{display:grid;gap:10px;margin-top:12px}.dict-row{display:grid;grid-template-columns:140px 1fr;gap:16px;padding:12px 14px;border-radius:16px;background:#fffdf8;border:1px solid #eadcc9}.dict-row strong{color:var(--accent)}
.narrative-card ul,.bullet-list,.number-list{margin:14px 0 0;padding-left:20px;color:var(--muted);line-height:1.85}
.cases-app{padding:18px}.cases-toolbar{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;margin-bottom:18px}.filter-group{display:flex;gap:10px;flex-wrap:wrap}
.filter-button,.detail-tab{padding:11px 16px;border-radius:999px;border:1px solid var(--line);background:#fff7ed;color:var(--muted);cursor:pointer;transition:.2s ease}.filter-button.active,.filter-button:hover,.detail-tab.active{background:linear-gradient(135deg,var(--accent),#c97953);color:#fff;border-color:transparent}
.cases-layout{grid-template-columns:420px minmax(0,1fr)}.case-item{padding:16px;border-radius:22px;border:1px solid var(--line);background:#fffaf2;cursor:pointer;transition:.22s ease}.case-item:hover,.case-item.active{transform:translateY(-3px);box-shadow:0 12px 24px rgba(65,45,23,.08);border-color:#cdb59d}.case-item h3{margin:0 0 8px;font-size:22px}.case-item p{margin:0;color:var(--muted);line-height:1.7}
.metric-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.metric-row span{padding:7px 10px;border-radius:999px;background:#f7ecdb;color:#34465a;font-size:12px}
.card-actions{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:14px}.ghost-button,.primary-button{padding:10px 14px;border:none;border-radius:999px;cursor:pointer;font-size:14px}.ghost-button{background:#f0e6d7;color:var(--ink)}.primary-button{background:linear-gradient(135deg,var(--accent),#c97953);color:#fff}
.detail-tabs,.fact-chips,.agent-presets{display:flex;gap:10px;flex-wrap:wrap}.highlight-list,.source-list{display:grid;gap:8px;margin-top:16px}.highlight-list div,.source-list div{padding:12px 14px;border-radius:16px;background:#fffdf8;border:1px solid #eadcc9;color:var(--muted);line-height:1.76}
.compare-box{display:grid;gap:16px}#compare-chart{width:100%;height:auto;border-radius:20px;border:1px solid var(--line);background:linear-gradient(180deg,#fffaf2,#f5ebdd)}.compare-summary{padding:16px 18px;border-radius:18px;background:#fffdf8;border:1px solid #eadcc9;color:var(--muted);line-height:1.82}
.fact-chips span{padding:10px 12px;border-radius:999px;background:#f6ead9;border:1px solid var(--line);color:#33485f;font-size:13px}.image-credit{margin:10px 2px 0;color:var(--muted);font-size:13px}.image-credit a{text-decoration:none;color:var(--muted)}
.glossary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.glossary-grid strong{display:block;margin-bottom:8px;font-size:18px}
.agent-chat{min-height:380px;max-height:720px;overflow:auto;display:grid;gap:12px;padding:8px 4px}.chat-message{max-width:82%;padding:14px 16px;border-radius:20px;line-height:1.86}.chat-message.agent{background:#fffaf2;border:1px solid var(--line)}.chat-message.user{margin-left:auto;background:linear-gradient(135deg,var(--accent),#c97953);color:#fff}
.agent-form textarea{width:100%;border:1px solid var(--line);border-radius:20px;padding:16px;font:inherit;resize:vertical;min-height:120px;background:#fffdf8}.agent-actions{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-top:14px}
.lightbox{position:fixed;inset:0;display:none;place-items:center;padding:40px;background:rgba(15,18,25,.74);z-index:999}.lightbox.open{display:grid}.lightbox img{max-width:min(1320px,92vw);max-height:78vh;border-radius:18px;border:1px solid rgba(255,255,255,.2);box-shadow:0 30px 90px rgba(0,0,0,.35)}.lightbox-caption{color:#fff;margin-top:16px;text-align:center;max-width:980px;line-height:1.8}.lightbox-close{position:absolute;top:24px;right:24px;width:44px;height:44px;border:none;border-radius:50%;background:rgba(255,255,255,.14);color:#fff;font-size:28px}
@media (max-width:1180px){.feature-grid,.mini-case-grid,.narrative-grid,.hero-grid,.dual-columns,.hero-banner,.cases-layout,.detail-card,.formula-card,.knowledge-block{grid-template-columns:1fr}.site-shell{grid-template-columns:1fr}.sidebar{position:fixed;left:0;top:0;transform:translateX(-100%);width:min(88vw,360px);z-index:80;transition:.25s ease}body.sidebar-open .sidebar{transform:translateX(0)}.sidebar-toggle{display:block}.page-main{padding:24px 18px 56px}}
@media (max-width:760px){.hero-copy h2,.section-head h2{font-size:32px}.stats-grid,.system-steps,.feature-grid,.mini-case-grid,.narrative-grid,.glossary-grid{grid-template-columns:1fr}.agent-actions{flex-direction:column;align-items:flex-start}.dict-row{grid-template-columns:1fr}}