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0 10px}.map-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;flex-wrap:wrap}.map-head h2{font-size:24px}.map-head p{margin-top:6px;font-size:13px;color:var(--muted);line-height:1.7}.map-stats{display:flex;gap:10px;flex-wrap:wrap}.map-stats .stat{min-width:82px;padding:8px 14px;text-align:center;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow)}.map-stats b{display:block;font-size:20px;line-height:1.2;color:var(--brand-dark);font-variant-numeric:tabular-nums}.map-stats span{font-size:11px;color:var(--muted)}.map-filter{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0 4px}.fbtn{padding:6px 14px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--ink);font-size:13px;font-weight:600;cursor:pointer;transition:all .15s ease}.fbtn:hover{border-color:var(--brand)}.fbtn.active{background:var(--brand);border-color:var(--brand);color:#fff}.grade-block{margin-top:20px}.grade-title{display:flex;align-items:baseline;gap:8px;margin-bottom:10px;font-size:15px}.grade-title span{font-size:12px;font-weight:400;color:var(--muted)}.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}.tcard{display:flex;flex-direction:column;padding:14px 16px 12px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);cursor:pointer;transition:all .15s ease}.tcard:hover{transform:translateY(-2px);border-color:#bfdbfe;box-shadow:0 6px 18px #2563eb1f}.tcard.coming{cursor:default;opacity:.72;background:#fbfcfe}.tcard.coming:hover{transform:none;border-color:var(--line);box-shadow:var(--shadow)}.tcard-top{display:flex;align-items:center;gap:8px}.grade-chip{padding:2px 7px;border-radius:6px;background:var(--brand-soft);color:var(--brand-dark);font-size:11px;font-weight:700}.heat-mini{font-size:11px;letter-spacing:1px;color:#e2e8f0}.heat-mini .on{color:var(--amber)}.pin-btn{margin-left:auto;padding:2px 4px;border:none;background:transparent;color:#cbd5e1;font-size:18px;line-height:1;cursor:pointer}.pin-btn:hover,.pin-btn.on{color:var(--amber)}.tcard h4{margin:8px 0 2px;font-size:15px;line-height:1.4}.tcard-chapter{font-size:11px;color:var(--muted)}.tcard-note{flex:1;margin-top:8px;font-size:12.5px;line-height:1.65;color:var(--muted)}.tcard-foot{display:flex;align-items:center;justify-content:space-between;margin-top:10px}.badge{padding:2px 8px;border-radius:999px;font-size:11px;font-weight:600}.badge.ready{background:#d1fae5;color:#047857}.badge.coming{background:#e2e8f0;color:#64748b}.go-hint{font-size:12px;font-weight:600;color:var(--brand)}.empty{margin-top:18px;padding:48px 16px;text-align:center;color:var(--muted);background:#fff;border:1px dashed var(--line);border-radius:var(--radius)}.empty p{margin-bottom:14px;font-size:14px}.map-tip{margin-top:14px;font-size:12px;color:var(--muted)}.demo-top{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:12px}.demo-top .crumb{flex:1;font-size:12px;color:var(--muted)}.pin-toggle{padding:6px 12px;font-size:12px}.pin-toggle.on{background:#fef3c7;border-color:#fcd34d;color:#b45309}.empty-card{display:flex;flex-direction:column;align-items:flex-start;gap:10px;padding:26px}.empty-card h2{font-size:18px}.expr-sys{display:flex;align-items:center;gap:6px}.expr-sys .brace{font-size:42px;font-weight:400;line-height:1;color:#94a3b8}.expr-sys .eqs{display:flex;flex-direction:column;gap:2px;font-size:19px;line-height:1.35}@media(max-width:640px){.map-head h2{font-size:20px}.topic-grid{grid-template-columns:1fr}.map-stats{width:100%}.map-stats .stat{flex:1}}