:root{--a: #2563eb;--a-bg: #dbeafe;--b: #ea580c;--b-bg: #ffedd5;--c: #059669;--c-bg: #d1fae5;--d: #7c3aed;--d-bg: #ede9fe;--ink: #1e293b;--sub: #64748b;--line: #e2e8f0;--bg: #eef2f9;--card: #ffffff;--grad-head: linear-gradient(135deg, #1e3a8a, #3730a3 55%, #4c1d95);--font: -apple-system, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;margin:0;padding:0}html,body{height:100%}body{font-family:var(--font);background:var(--bg);color:var(--ink);overflow:hidden}#root{height:100%;display:flex;flex-direction:column}header.app-header{position:relative;flex:none;z-index:50;background:var(--grad-head);color:#fff;padding:10px 14px 8px;box-shadow:0 2px 12px #1e3a8a4d}header.app-header h1{font-size:17px;letter-spacing:.5px;display:flex;align-items:center;gap:8px}header.app-header .logo{font-size:22px}header.app-header p{font-size:11.5px;opacity:.9;margin-top:2px}.tabs{display:flex;gap:6px;margin-top:8px}.tab{flex:1;text-align:center;padding:7px 0;border-radius:11px;font-size:13px;font-weight:700;color:#c7d2fe;background:#ffffff14;cursor:pointer;transition:all .2s}.tab.on{background:#fff;color:#3730a3}main.app-main{position:relative;flex:1;min-height:0;overflow:auto}.page-section{padding:14px 12px 30px}.unit-card{background:var(--card);border:1.5px solid var(--line);border-radius:14px;padding:12px 14px;margin-bottom:12px}.unit-card.feature{border-color:var(--a)}.unit-card.feature-b{border-color:var(--b)}.unit-card.feature-c{border-color:var(--c)}.unit-card.feature-d{border-color:var(--d)}.unit-title{display:flex;align-items:center;gap:8px;font-size:14.5px;font-weight:800;margin-bottom:8px;color:var(--ink)}.unit-title .src-tag{font-size:10px;color:var(--sub);font-weight:600;border:1px solid var(--line);border-radius:8px;padding:1px 7px}.unit-title .badge-tag{font-size:10px;color:#fff;padding:1px 8px;border-radius:9px;font-weight:700;margin-left:auto}.kp{font-size:13px;line-height:1.7;color:#334155;margin:4px 0}.kp b{color:#0f172a;font-weight:800}ul.pts{padding-left:18px;margin:4px 0}ul.pts li{font-size:13px;line-height:1.65;color:#334155;margin-bottom:4px}table.simple{width:100%;border-collapse:collapse;margin:8px 0;font-size:12.5px}table.simple th{background:#f1f5f9;color:#334155;padding:6px 7px;text-align:left;font-weight:700}table.simple td{padding:6px 7px;border-top:1px solid var(--line);vertical-align:top;line-height:1.5}.anchor-block{background:#fffaf0;border-left:4px solid #f59e0b;border-radius:8px;padding:8px 11px;font-size:13px;color:#78350f;margin:8px 0;line-height:1.65}.rel-block{font-size:12px;color:var(--sub);background:#f1f5f9;border-radius:8px;padding:7px 10px;margin-top:7px;line-height:1.55}.map-wrap{position:relative;width:100%;height:100%;overflow:hidden;touch-action:none;background:#f4f7fc;background-image:radial-gradient(#d8dfeb 1px,transparent 1px);background-size:22px 22px}.map-canvas{position:absolute;top:0;left:0;width:100%;height:100%}.mnode{position:absolute;transform:translate(-50%,-50%);text-align:center;cursor:pointer;-webkit-user-select:none;user-select:none;white-space:nowrap;transition:transform .15s,box-shadow .15s;border-radius:14px;font-weight:700;display:flex;align-items:center;justify-content:center;gap:4px;border:2px solid;box-shadow:0 3px 8px #0f172a14;z-index:4}.mnode:active{transform:translate(-50%,-50%) scale(.94)}.mnode.root{background:var(--grad-head);color:#fff;border-color:#312e81;font-size:17px;padding:18px 26px;border-radius:22px;z-index:5;font-weight:800}.mnode.l1{font-size:15px;padding:13px 18px;border-radius:18px;z-index:4;font-weight:800;color:#fff}.mnode.l2{font-size:12.5px;padding:8px 11px;border-radius:12px;z-index:3;font-weight:700;max-width:230px;white-space:normal;line-height:1.3;color:#0f172a}.mnode.done{box-shadow:0 0 0 3px #fbbf24}.zoombar{position:absolute;right:12px;bottom:14px;z-index:9;display:flex;flex-direction:column;gap:6px}.zoombar button{width:46px;height:46px;border-radius:14px;border:none;background:#fff;color:#1e3a8a;font-size:22px;font-weight:800;box-shadow:0 2px 10px #0000002e;cursor:pointer;opacity:.95}.acc-card{background:#fff;border-radius:15px;margin:8px 12px;box-shadow:0 1px 5px #02061712;overflow:hidden}.acc-h{display:flex;align-items:center;gap:8px;padding:13px 14px;font-weight:800;font-size:14.5px;cursor:pointer;-webkit-user-select:none;user-select:none;line-height:1.4}.acc-h .arr{font-size:11px;color:#94a3b8;transition:transform .2s;flex:none}.acc.open .acc-h .arr{transform:rotate(90deg)}.acc-h .cnt{margin-left:auto;font-size:11px;color:#64748b;background:#f1f5f9;border-radius:10px;padding:2px 9px;flex:none}.acc-b{display:none;padding:2px 0 6px}.acc.open 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11px;font-size:13px;cursor:pointer;transition:.15s;background:#fff;text-align:left}.opt:active{background:#f1f5f9}.opt.ok{background:#dcfce7;border-color:#22c55e;color:#14532d}.opt.no{background:#fee2e2;border-color:#ef4444;color:#7f1d1d}.opt.dim{opacity:.5}.fb{display:none;margin-top:8px;font-size:12.5px;line-height:1.6;border-radius:10px;padding:8px 11px}.fb.show{display:block}.fb.good{background:#f0fdf4;color:#14532d;border:1px solid #bbf7d0}.fb.bad{background:#fef2f2;color:#7f1d1d;border:1px solid #fecaca}.answer-block{background:#f0fdf4;border:1.5px solid #bbf7d0;border-radius:12px;padding:10px 12px;margin-top:10px;display:none}.answer-block.show{display:block}.answer-block .q-label{font-size:13px;font-weight:700;color:#166534;margin-bottom:4px}.answer-block .a-text{font-size:12.5px;color:#14532d;line-height:1.6}.hint-line{font-size:11.5px;color:#94a3b8;text-align:center;padding:4px 0 18px}.detail-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a66;z-index:60;display:flex;align-items:flex-end;justify-content:center}.detail-sheet{width:100%;max-width:760px;max-height:88%;background:#fff;border-radius:22px 22px 0 0;display:flex;flex-direction:column;animation:slide-up .25s ease}@keyframes slide-up{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.detail-bar{display:flex;align-items:center;gap:10px;padding:12px 16px;border-bottom:1px solid var(--line);background:#f8fafc;border-radius:22px 22px 0 0}.detail-bar h3{flex:1;font-size:15px;font-weight:800;display:flex;align-items:center;gap:8px}.detail-bar .dot{width:11px;height:11px;border-radius:50%;display:inline-block}.detail-bar button.close{width:34px;height:34px;border-radius:50%;border:none;background:#e2e8f0;color:#334155;font-size:17px;cursor:pointer;font-weight:700}.detail-body{overflow-y:auto;padding:14px 16px 30px}.btn-primary{margin:2px 12px 14px;display:block;width:calc(100% - 24px);padding:12px;border:none;border-radius:13px;background:var(--grad-head);color:#fff;font-size:14px;font-weight:700;cursor:pointer}.btn-row{display:flex;gap:8px;margin:8px 12px 0}.btn-row .opt{flex:1;padding:8px;text-align:center}.score-bar{position:sticky;top:0;background:var(--bg);padding:8px 12px 6px;z-index:5;font-size:13px;font-weight:700;color:#1e3a8a}.empty{padding:40px 20px;text-align:center;color:var(--sub);font-size:13px}.loading{padding:60px 20px;text-align:center;color:var(--sub);font-size:14px}.review-card{background:#fff;border-radius:14px;padding:14px;margin:0 12px 12px;box-shadow:0 1px 5px #02061712}.review-card .head{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--sub);margin-bottom:8px}.review-card .head .badge{background:#fee2e2;color:#b91c1c;padding:2px 8px;border-radius:8px;font-weight:700}.review-card .question{font-size:14px;font-weight:600;line-height:1.55;margin-bottom:10px;color:var(--ink)}.review-card .actions{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}.review-card .actions button{border:1px solid var(--line);border-radius:10px;padding:8px 4px;font-size:12px;background:#fff;cursor:pointer}.review-card .actions button.hard{background:#fee2e2;border-color:#ef4444;color:#b91c1c}.review-card .actions button.easy{background:#dcfce7;border-color:#22c55e;color:#166534}.search-modal{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a99;z-index:100;display:flex;align-items:flex-start;justify-content:center;padding-top:80px}.search-panel{width:90%;max-width:560px;background:#fff;border-radius:14px;box-shadow:0 8px 30px #00000040;overflow:hidden;animation:slide-down .2s ease}@keyframes slide-down{0%{transform:translateY(-12px);opacity:0}to{transform:translateY(0);opacity:1}}.search-panel input{width:100%;padding:14px 16px;border:none;font-size:16px;outline:none;border-bottom:1px solid var(--line)}.search-result{max-height:60vh;overflow-y:auto}.search-item{padding:12px 16px;border-bottom:1px solid #f1f5f9;cursor:pointer}.search-item:hover{background:#f8fafc}.search-item .title{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:4px}.search-item .snippet{font-size:12px;color:var(--sub);line-height:1.55;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.search-item .type{display:inline-block;background:#f1f5f9;color:#475569;padding:1px 7px;border-radius:7px;font-size:11px;margin-right:6px}@media (max-width: 430px){.kp{font-size:12.8px}ul.pts li{font-size:12.5px}}