:root{--ink:#203d3a;--muted:#778681;--green:#246957;--pale:#eaf1eb;--border:#e1e7e1;--orange:#cf8a52}*{box-sizing:border-box}body{margin:0;background:#f6f7f2;color:var(--ink);font:14px/1.75 'Microsoft YaHei','Segoe UI',sans-serif}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer;border:0}button:focus-visible,a:focus-visible,[role=button]:focus-visible{outline:3px solid #d69a58;outline-offset:4px}a{color:var(--green)}aside{width:218px;height:100vh;position:fixed;background:#fafbf7;border-right:1px solid var(--border);padding:34px 23px}.brand{display:flex;gap:12px;text-decoration:none;font-size:32px;line-height:1.35}.brand span{font-size:20px;letter-spacing:2px;font-weight:700}.brand small{display:block;font-size:9px;letter-spacing:3px;font-weight:400;margin-top:5px}.side-label{font-size:10px;letter-spacing:2px;color:var(--muted);margin:65px 12px 15px}nav{display:grid;gap:8px}.nav{background:transparent;text-align:left;padding:12px 17px;border-radius:8px;color:#6c7a73}.nav.active{background:#e5eee5;color:var(--green);font-weight:700}.side-bottom{position:absolute;bottom:32px;font-size:11px;color:var(--muted);width:170px}.dot{display:inline-block;width:6px;height:6px;background:#609977;border-radius:50%;margin-right:6px}.side-bottom p{font-size:12px;color:var(--ink)}main{margin-left:218px;padding:0 42px;max-width:1700px}header{height:83px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--muted)}header b{font-weight:400;color:var(--ink);margin-left:8px}.badge,.pill{font-size:11px;border:1px solid var(--border);border-radius:20px;padding:4px 12px;background:#f8faf6}.intro{display:flex;align-items:center;justify-content:space-between;padding:37px 0 30px;gap:20px}.eyebrow{font-size:10px;letter-spacing:2px;color:var(--green)}h1{font-family:'Songti SC','SimSun',serif;font-size:34px;letter-spacing:2px;margin:7px 0 8px;font-weight:600}p{margin:8px 0;color:#6a7d74}.primary,.secondary{padding:11px 20px;border-radius:6px;transition:.2s}.primary{background:var(--green);color:white}.primary:hover{background:#184c3f}.secondary{background:#edf1e9;color:var(--green)}.full{width:100%;margin-top:18px}.atlas-grid{display:grid;grid-template-columns:minmax(430px,1.7fr) minmax(280px,1fr);gap:22px}.card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:25px}.card-head{display:flex;justify-content:space-between;align-items:center;gap:14px}h2{font-size:18px;margin:0 0 3px}h3{font-size:14px;margin:23px 0 7px}.card-head p{font-size:12px;margin:3px 0 0}.tabs{display:flex;border-bottom:1px solid var(--border);gap:25px;margin-top:22px}.tabs button{padding:10px 3px;background:transparent;color:var(--muted);border-bottom:2px solid transparent}.tabs .selected{color:var(--green);border-color:var(--green)}.map-wrap{background:radial-gradient(ellipse,#f0f4eb, #fcfdf9 65%);margin-top:15px;border-radius:8px}.map-label{font-size:10px;padding:13px 16px;color:var(--muted);display:flex;justify-content:space-between}svg{width:100%;height:470px;display:block}.map-legend{display:flex;justify-content:center;gap:22px;padding:12px;font-size:10px;color:var(--muted)}.legend{display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:5px}.central{background:#547d70}.nerve{background:#c3a66b}.selected-dot{background:var(--orange)}.fine{font-size:10px;line-height:1.8;color:#88958b;margin-top:15px}.detail-col{display:grid;align-content:start;gap:20px}.detail{padding:28px}.detail h2{font-size:27px;margin:15px 0 10px}.detail>p{font-size:13px;line-height:1.95}.question{border-left:2px solid #c49c6a;background:#f8f6ef;padding:12px 16px;margin-top:20px}.question span{font-size:10px;letter-spacing:1px;color:#a17d4f}.question p{font-size:12px;margin-bottom:0;color:#786d55}.note{background:#edf2e9}.note>span{font-size:10px;color:var(--green);letter-spacing:1px}.note h3{font-size:19px;margin-top:10px}.note p{font-size:12px}.path{display:flex;justify-content:space-between;font-size:11px;margin-top:20px}.path b{color:#9ba897}.hidden{display:none!important}footer{display:flex;justify-content:space-between;padding:26px 0;font-size:10px;color:#8d998f}.case-layout{display:grid;grid-template-columns:255px 1fr;gap:22px}.case-list button{width:100%;text-align:left;display:block;padding:16px 12px;background:#f5f7f2;margin:12px 0;border-radius:6px;color:var(--ink)}.case-list button.active{background:#e4eee5;border-left:3px solid var(--green)}.case-list small{display:block;color:var(--muted)}.training h2{margin-top:22px;font-size:23px}.vignette{background:#f5f7f2;padding:20px;border-radius:8px;margin-top:18px;line-height:2}.stepper{display:flex;gap:18px;padding:20px 0;font-size:11px;color:#8d9a90}.stepper .on{color:var(--green);font-weight:700}.option{display:flex;padding:13px;border:1px solid var(--border);border-radius:7px;margin:9px 0;gap:10px;cursor:pointer}.option:has(input:checked){background:#edf5ee;border-color:#799a85}input{accent-color:var(--green)}.actions{display:flex;justify-content:space-between;margin-top:25px}.feedback{margin-top:17px;padding:17px;border-radius:7px;background:#edf3e9}.feedback.wrong{background:#faf1e6}.feedback h3{margin:0}.feedback p{font-size:13px}#hint-content{color:#936c3c;font-size:12px;margin-top:12px}.stats{display:flex;gap:60px;border-bottom:1px solid var(--border);padding:30px 0}.stats strong{display:block;font-size:35px;font-family:Georgia,serif}.record{padding:20px 0;border-bottom:1px solid var(--border)}.record span{float:right;color:var(--green)}.prose{max-width:900px;padding:35px}.prose h2{margin-top:15px}.prose p{line-height:2}.map-node{cursor:pointer}.map-node circle{transition:.2s}.map-node:hover circle,.map-node.active circle{fill:#d18e55;stroke:#fff;stroke-width:3}.map-node text{font-size:14px;fill:#4e6e60;pointer-events:none}.map-node.active text{fill:#a56637;font-weight:700}.body-outline{fill:#e5ebe2;stroke:#cbd7ca;stroke-width:2}.nerves{fill:none;stroke:#b59e68;stroke-width:3;stroke-linecap:round}.spine{fill:none;stroke:#668e7e;stroke-width:10;stroke-linecap:round}.map-node circle{fill:#6b9582;stroke:#fff;stroke-width:2}.attribution{font-size:11px;fill:#8b9b8d}@media(min-width:1500px){svg{height:550px}}@media(max-width:1100px){aside{width:180px;padding:30px 14px}main{margin-left:180px;padding:0 24px}.atlas-grid{grid-template-columns:1.4fr 1fr}.card{padding:18px}.map-card .pill{display:none}.detail{padding:22px}.case-layout{grid-template-columns:210px 1fr}}@media(max-width:800px){aside{position:static;width:100%;height:auto;display:flex;align-items:center;justify-content:space-between;padding:15px}.brand{font-size:25px}.brand span{font-size:16px}.side-label,.side-bottom{display:none}nav{display:flex;gap:2px}.nav{font-size:11px;padding:8px}.brand small{font-size:7px}main{margin:0;padding:0 16px}header{height:60px;font-size:10px}.badge{font-size:9px;padding:3px 7px}.intro{padding:25px 0;align-items:flex-start}h1{font-size:26px}.intro>button{font-size:11px;padding:10px}.intro p{font-size:12px}.atlas-grid,.case-layout{grid-template-columns:1fr}.detail-col{grid-template-columns:1fr 1fr}.case-list #case-buttons{display:flex;gap:10px}.case-list button{margin:10px 0;font-size:11px}.stats{gap:30px}footer{gap:20px}}@media(max-width:500px){nav .nav{font-size:10px;padding:7px}.brand{gap:5px}.brand span{font-size:13px}.detail-col{grid-template-columns:1fr}.intro{display:block}.intro>button{margin-top:12px}.tabs{gap:25px}.map-label{font-size:9px}svg{height:420px}.card-head{align-items:flex-start}.stats{gap:20px}.stepper{gap:12px}}
/* Detailed anatomical explorer */
.map-card{overflow:hidden}.map-card svg{height:610px}.map-wrap{border:1px solid #e5ebe2;background:radial-gradient(ellipse at 50% 45%,#f4f3e7,#fbfcf8 72%)}.diagram-caption{font-size:12px;letter-spacing:1px;fill:#57776c}.anatomy-label{font-size:12px;fill:#577266}.nerve-web{fill:none;stroke:#b9a16a;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}.map-node text{font-size:12px}.map-node circle.hit{fill:transparent!important;stroke:none!important}.map-node:hover circle:not(.hit),.map-node.active circle:not(.hit){fill:#d18e55;stroke:#fff;stroke-width:2}.explorer{margin-top:22px;padding-top:20px;border-top:1px solid var(--border)}.explorer-top{display:flex;justify-content:space-between;align-items:center;gap:15px}.explorer-top b{font-size:13px}.explorer input{width:65%;padding:9px 12px;border:1px solid var(--border);border-radius:6px;background:#f9faf6;font:inherit;font-size:12px;color:var(--ink)}.index-group h4{font-size:11px;color:#74877a;margin:19px 0 8px;font-weight:400;letter-spacing:1px}.index-group>div{display:flex;flex-wrap:wrap;gap:6px}.index-group button,.segment-row button{background:#f2f5ee;color:#536f61;border:1px solid #e3e9df;border-radius:5px;padding:5px 9px;font-size:11px}.index-group button:hover,.index-group button.active,.segment-row button.active{background:#246957;color:#fff;border-color:#246957}#segment-panel:not(:empty){border-top:1px solid var(--border);padding:0 0 15px}#segment-panel p{font-size:11px}.segment-row{display:flex;flex-wrap:wrap;gap:5px;margin:9px 0;align-items:center}.segment-row>span{font-size:11px;width:36px}.segment-row button{padding:4px 7px;min-width:30px}.detail{position:sticky;top:20px}.detail-col{display:block}.detail-col .note{margin-top:20px}.case-tools{margin:20px 0}.case-tools label{display:block;font-size:11px;color:var(--muted)}.case-tools select{display:block;width:100%;border:1px solid var(--border);padding:9px;border-radius:5px;color:var(--ink);background:#f7faf4;font-size:11px;margin:6px 0 12px}.case-tools button{width:100%;font-size:12px}#case-buttons{max-height:680px;overflow:auto;padding-right:5px;scrollbar-width:thin}.atlas-link{display:block;background:transparent;color:var(--green);padding:12px 0 0;font-size:11px;text-decoration:underline;text-underline-offset:4px}.case-layout{grid-template-columns:285px 1fr}.case-list small{font-size:10px}.case-list button{font-size:12px}.case-list .fine{font-size:10px}.training{align-self:start}.case-list{align-self:start}.tabs{gap:20px}.tabs button{font-size:12px}.training .vignette{font-size:14px;line-height:2.1}button:disabled{cursor:default;opacity:.6}@media(max-width:1100px){.case-layout{grid-template-columns:245px 1fr}.tabs{gap:12px}.tabs button{font-size:11px}.map-card svg{height:560px}}@media(max-width:800px){.case-layout{grid-template-columns:1fr}.case-list #case-buttons{display:grid;grid-template-columns:1fr 1fr;max-height:260px;gap:6px}.case-list #case-buttons button{margin:0}.detail{position:static}.detail-col{display:grid}.detail-col .note{margin-top:0}.map-card svg{height:590px}}@media(max-width:500px){.map-card svg{height:490px}.tabs{gap:14px}.tabs button{font-size:11px}.explorer-top{display:block}.explorer input{width:100%;margin-top:8px}.detail-col{display:block}.detail-col .note{margin-top:20px}.case-list #case-buttons{grid-template-columns:1fr}.segment-row button{padding:5px 8px}}