:root{--bg:#f5f1ea;--panel:#fffdfa;--ink:#20222c;--muted:#636b78;--line:#d9d1c4;--accent:#6d4e2f;--accent2:#274f68;--warn:#8a2f2f;--shadow:0 18px 40px rgba(32,34,44,.10);--ui:"PingFang SC","Noto Sans CJK SC",system-ui,sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--ui);letter-spacing:0}a{color:inherit}img{max-width:100%;display:block}
.topbar{position:sticky;top:0;z-index:20;display:flex;justify-content:space-between;gap:20px;align-items:center;padding:14px 32px;background:rgba(245,241,234,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(16px)}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}.brand span{display:grid;place-items:center;width:40px;height:40px;border-radius:8px;background:var(--ink);color:#fff;font-weight:900}.brand strong{font-size:16px}.brand em{font-style:normal;font-size:12px;color:var(--muted)}
.topbar nav{display:flex;gap:10px;flex-wrap:wrap}.topbar nav a,.button,.path-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 14px;border:1px solid var(--line);border-radius:8px;background:var(--panel);text-decoration:none;font-weight:700;min-height:44px}
.button.primary{background:var(--ink);color:#fff;border-color:var(--ink)}.path-button{flex-direction:column;align-items:flex-start}.path-button span{font-size:12px;color:var(--muted)}.path-button strong{font-size:14px;line-height:1.35}.path-button.disabled{opacity:.55;pointer-events:none}
main{padding-bottom:48px}.hero{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:28px;align-items:center;padding:48px 32px 24px}.hero h1{font-size:clamp(40px,6vw,68px);line-height:1.08;margin:12px 0 16px}.lead{font-size:19px;line-height:1.75;color:var(--muted)}.eyebrow{font-size:13px;font-weight:800;color:var(--accent2);text-transform:uppercase;letter-spacing:.06em}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.hero-panel{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:18px;box-shadow:var(--shadow)}.hero-panel img{border-radius:6px;border:1px solid var(--line);background:#fff}.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:16px}.stats div{background:#f7f4ed;border:1px solid var(--line);border-radius:8px;padding:12px;text-align:center}.stats strong{display:block;font-size:24px}.stats span{font-size:12px;color:var(--muted)}
.section,.layout,.page-title,.style-board{padding:0 32px}.section{margin-top:26px}.section-head{display:flex;justify-content:space-between;gap:18px;align-items:end;margin-bottom:16px}.section-head h2{font-size:28px;margin:0}.section-head p{max-width:780px;color:var(--muted);line-height:1.7}.grid,.entry-router,.plate-grid,.route-grid{display:grid;gap:16px}.grid{grid-template-columns:repeat(3,minmax(0,1fr))}.entry-router{grid-template-columns:repeat(4,minmax(0,1fr))}.card,.entry-card,.route-card,.plate-thumb,.term-chip{background:var(--panel);border:1px solid var(--line);border-radius:8px;text-decoration:none;box-shadow:var(--shadow)}.card,.entry-card,.route-card{padding:18px}.card small,.entry-card span,.plate-card small,.crumb,.source-caption{color:var(--muted)}.card h3,.entry-card strong{font-size:22px;margin:8px 0 10px;line-height:1.28}.card p,.entry-card p,.route-card span,.deep-card p,.reading-card p,.source-item p,.answer,.quiz p{line-height:1.72;color:var(--muted)}
.entry-card.primary{background:var(--ink);color:#fff}.entry-card.primary p,.entry-card.primary span{color:rgba(255,255,255,.72)}
.page-title{display:flex;justify-content:space-between;gap:20px;align-items:flex-start;padding-top:28px}.page-title h1,.layout h1{font-size:clamp(34px,5.4vw,58px);margin:0 0 12px;line-height:1.08}.page-title p,.layout .lead{max-width:940px}
.learning-path{display:flex;gap:12px;flex-wrap:wrap;padding:18px 32px 0}.style-board.detail-board{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:20px;padding-top:20px}
.panel,.reading-card,.viewer,.quiz-box,.deep-card,.source-item{background:var(--panel);border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow)}.panel{padding:18px}.detail-panel{padding:0;background:transparent;border:0;box-shadow:none}.visual-stack{padding:16px;position:sticky;top:82px;align-self:start}.reading-card,.viewer,.quiz-box{padding:18px;margin-bottom:16px}.reading-card h2,.viewer h2,.quiz-box h2,.panel h2,.plate-rail h2{font-size:22px;margin:0 0 12px}
.route-card .source-expansion,.source-expansion,.source-expansion-deep{display:grid;gap:12px}.route-item,.source-item-deep{padding:14px}.route-number{display:inline-flex;width:28px;height:28px;border-radius:999px;background:var(--ink);color:#fff;align-items:center;justify-content:center;font-size:13px;font-weight:800;margin-bottom:10px}
.source-meta{display:flex;gap:10px;align-items:flex-start;margin-top:10px;font-size:14px}.source-meta strong{min-width:64px;color:var(--ink)}.source-meta span{color:var(--muted);line-height:1.6}.source-meta.caution strong{color:var(--warn)}
.detail-list,.check-list{padding-left:20px;margin:0}.detail-list li,.check-list li{margin:8px 0;line-height:1.7}
.term-cloud,.pill-row{display:flex;gap:10px;flex-wrap:wrap}.term-chip,.pill{display:inline-flex;align-items:center;gap:6px;padding:10px 12px;border-radius:999px}.term-chip em{font-style:normal;color:var(--muted);font-size:12px}
.viewer-main{margin:0 0 12px}.viewer-main img{width:100%;border-radius:6px;border:1px solid var(--line);background:#fff}.viewer-main figcaption{margin-top:8px;color:var(--muted);font-size:14px;line-height:1.6}.thumbs{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px}.thumbs button{padding:0;border:1px solid var(--line);border-radius:6px;background:#fff;cursor:pointer}.thumbs img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:6px}
.plate-path-section{margin-top:26px}.plate-path-group{margin-bottom:18px}.plate-path-head{margin-bottom:12px}.plate-path-head h3{margin:0 0 8px;font-size:20px}.plate-path-head p{margin:0;color:var(--muted);line-height:1.7}
.plate-card img,.plate-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:6px;border:1px solid var(--line);background:#fff}.plate-card p{margin-bottom:0}.plate-thumb{padding:10px}.plate-thumb span{display:block;margin-top:8px;font-weight:700}.plate-thumb small{display:block;margin-top:4px}
.compact{grid-template-columns:repeat(2,minmax(0,1fr))}.layout.narrow{max-width:1180px;margin:0 auto;padding-top:28px}.route-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.detail-layout{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:20px;padding-top:28px}.plate-rail{padding:18px;position:sticky;top:82px;align-self:start}
.image-stage img{width:100%;max-height:72vh;object-fit:contain;border-radius:8px;border:1px solid var(--line);background:#fff}
.quiz-box button,[data-answer]{padding:10px 14px;border-radius:8px;border:1px solid var(--line);background:#fff;cursor:pointer;font-weight:700}.answer{display:none;margin-top:12px;padding:14px;border-radius:8px;background:#f7f4ed;border:1px solid var(--line)}
.term-table{width:100%;border-collapse:collapse;background:var(--panel);border:1px solid var(--line);border-radius:8px;overflow:hidden;box-shadow:var(--shadow)}.term-table th,.term-table td{border-bottom:1px solid var(--line);padding:14px;text-align:left;line-height:1.65;vertical-align:top}.term-table th{background:#f7f4ed}.search{width:100%;padding:14px 16px;border:1px solid var(--line);border-radius:8px;background:var(--panel);font-size:16px;margin:0 0 16px}
.empty-state{padding:18px;border:1px dashed var(--line);border-radius:8px;background:var(--panel);color:var(--muted)}
footer{padding:24px 32px 40px;color:var(--muted);font-size:14px}
@media (max-width:1100px){.hero,.style-board.detail-board,.detail-layout{grid-template-columns:1fr}.entry-router{grid-template-columns:repeat(2,minmax(0,1fr))}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.visual-stack,.plate-rail{position:static}.thumbs{grid-template-columns:repeat(6,minmax(0,1fr))}}
@media (max-width:720px){.topbar{padding:12px 16px;align-items:flex-start}.hero,.section,.layout,.page-title,.style-board,.learning-path{padding-left:16px;padding-right:16px}.hero{padding-top:28px}.grid,.entry-router,.route-grid,.plate-grid.compact,.stats{grid-template-columns:1fr}.page-title{flex-direction:column}.hero-panel{max-width:420px}.thumbs{grid-template-columns:repeat(4,minmax(0,1fr))}.brand em{display:none}}