.hand-toolbar{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin:0 0 14px;padding:10px 12px;border:1px solid #d6e2d0;border-radius:8px;background:#f0f5ec;font-size:11px;color:#60765a}.hand-toolbar>div{display:flex;gap:5px}.hand-toolbar button{border:1px solid transparent;background:transparent;border-radius:5px;padding:8px 13px;color:#728568;font-size:12px}.hand-toolbar button[aria-pressed=true]{background:#2c6959;color:#fff}.hand-toolbar small{font-size:10px;color:#819176}.mobile-model-tabs{display:none}
@media(max-width:650px){.mobile-model-tabs{display:flex;gap:7px;margin:0 0 12px}.mobile-model-tabs button{flex:1;border:1px solid #d2deca;border-radius:6px;padding:10px 5px;font-size:11px;background:transparent;color:#789066}.mobile-model-tabs button[aria-pressed=true]{background:#e0ecd8;color:#426d3c}.model-card:not(.focused){display:none}}
:root{font-family:Inter,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:#263b37;background:#f3f1eb;font-synthesis:none;--green:#24675c;--muted:#74817a;--border:#dce1d9;--paper:#fcfcf8;--orange:#c87946}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:wait;opacity:.45}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #b88d41;outline-offset:4px}a{color:var(--green)}[hidden]{display:none!important}.shell{max-width:1560px;margin:auto;padding:0 40px}.masthead{height:100px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #d7dcd3;gap:24px}.brand{display:flex;align-items:center;gap:13px;text-decoration:none;font-weight:650;font-size:23px;letter-spacing:-.6px}.brand-symbol{background:var(--green);color:#f6f4ea;display:grid;place-items:center;width:43px;height:46px;border-radius:13px;font-size:30px}.brand small{display:block;font-size:11px;letter-spacing:3px;font-weight:450;margin-top:3px}.masthead-note{font-size:13px;color:#6d7c73}.edition,.eyebrow{font-size:10px;letter-spacing:1.8px;font-weight:600;color:#70867b}.edition{letter-spacing:1.5px}.intro{padding:48px 0 38px;display:flex;justify-content:space-between;align-items:center;gap:36px}.intro h1{font-size:clamp(26px,2.6vw,40px);font-weight:520;letter-spacing:-1.5px;line-height:1.5;margin:12px 0}.intro h1 em{font-style:normal;color:var(--green)}.intro p{font-size:14px;line-height:1.9;color:#6c7972;margin:8px 0}.intro-note{border-left:2px solid #acc2ac;padding:8px 0 8px 24px;min-width:225px}.intro-note>span{display:block;font-size:11px;color:#79867b;margin-bottom:9px}.intro-note strong{font-size:17px;font-weight:550}.intro-note p{font-size:12px}.chapters{display:flex;gap:9px;margin-bottom:21px}.chapters button{border:1px solid #d5ddd3;border-radius:9px;background:transparent;padding:13px 25px;color:#718177;display:flex;gap:18px;align-items:center;font-size:13px}.chapters button b{font-size:11px;font-weight:500;opacity:.65}.chapters button[aria-pressed=true]{background:#285f53;color:#fff;border-color:#285f53;box-shadow:0 4px 10px #285f5310}.workbench{position:relative;background:var(--paper);border:1px solid #d7dfd4;border-radius:16px;padding:25px;box-shadow:0 10px 40px #40543c05}.workspace-heading{display:flex;justify-content:space-between;gap:25px;align-items:center;margin-bottom:21px}.workspace-heading h2{font-size:22px;font-weight:550;letter-spacing:-.6px;margin:8px 0}.workspace-heading p{font-size:12px;color:#7a877c;line-height:1.6;margin:0}.model-badge{font-size:10px;color:#788776;white-space:nowrap;background:#eef2e8;border:1px solid #e1e7da;border-radius:30px;padding:7px 11px}.workspace-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:24px}.visual-column{min-width:0}.view-toolbar{display:flex;align-items:center;gap:17px;font-size:11px;margin-bottom:15px;color:#738174}.view-toolbar>div{display:flex;flex-wrap:wrap;gap:3px}.view-toolbar button{background:transparent;border:0;border-radius:5px;color:#748174;padding:7px 10px;font-size:11px}.view-toolbar button[aria-pressed=true]{background:#e7eee4;color:#335e4e;font-weight:600}.model-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.model-card{border:1px solid #e1e6dc;border-radius:10px;background:#f4f5ef;overflow:hidden;min-width:0}.model-card.focused{border-color:#8cae93;box-shadow:0 0 0 1px #8cae9318}.model-heading{display:flex;align-items:center;padding:13px 13px 0;gap:10px;position:relative;z-index:1}.model-letter{font-size:12px;background:#e5e9df;color:#73836a;border-radius:6px;width:29px;height:30px;display:grid;place-items:center}.focused .model-letter{background:#d8e7d7;color:#416644}.model-heading h3{font-size:13px;font-weight:550;margin:0 0 4px}.model-heading div>span{font-size:9px;color:#8b9485}.focus-button{margin-left:auto;font-size:9px;border:0;border-bottom:1px solid #a4b2a2;background:transparent;color:#6b836a;padding:3px 0;white-space:nowrap}.viewport{height:360px;position:relative;touch-action:none;cursor:grab}.viewport:active{cursor:grabbing}.viewport canvas{display:block;width:100%;height:100%}.scene-caption{padding:10px 12px;display:flex;justify-content:space-between;gap:5px;border-top:1px solid #e4e8dd;font-size:8px;color:#899382}.scene-live{font-size:8px;letter-spacing:.7px}.legend{display:flex;gap:19px;flex-wrap:wrap;padding:13px 0;font-size:10px;color:#7e8b7e}.legend>span{display:flex;gap:5px;align-items:center}.legend i{width:7px;height:7px;background:var(--swatch);border-radius:50%}.playback{border-top:1px solid #e5e9df;padding-top:13px}.playback-top{display:flex;justify-content:space-between;align-items:center;gap:10px}.transport{display:flex;gap:10px;align-items:center}.play-button{border:0;background:#2c6959;color:#fff;padding:10px 16px;border-radius:6px;min-width:94px;font-size:12px}.reset-button{background:#eff2ea;border:0;color:#6c8068;border-radius:6px;width:33px;height:33px;font-size:22px}.transport label{font-size:10px;color:#8a9286;margin-left:5px}.transport select{font-size:11px;background:#f3f5ee;border:1px solid #e0e5d9;border-radius:5px;color:#52684d;padding:6px}.phase-status{font-size:11px;color:#657b5f;display:flex;gap:13px;align-items:center}.phase-status output{font-variant-numeric:tabular-nums;font-size:11px;color:#93a08b;width:36px;text-align:right}input[type=range]{accent-color:#347360;width:100%;height:18px;margin:14px 0 8px;cursor:pointer}.phase-buttons{display:flex;justify-content:space-between;gap:4px}.phase-buttons button{border:0;background:transparent;color:#98a18e;font-size:10px;padding:7px 3px;border-radius:5px}.phase-buttons button[aria-pressed=true]{color:#366c52;background:#eaf0e3}.phase-buttons b{font-weight:450;margin-right:5px}.timeline-note{font-size:9px;color:#9aA08f;line-height:1.7;margin:9px 0 0}.layer-controls{display:flex;flex-wrap:wrap;gap:14px;align-items:center;font-size:10px;color:#77856f;margin-top:15px;padding-top:12px;border-top:1px solid #e5e9df}.layer-controls label{display:flex;align-items:center;gap:5px}.layer-controls input{accent-color:#46775c;margin:0}.layer-controls>span{font-size:9px;color:#9bA08e;margin-left:auto}.inspector{background:#f0f3eb;border-radius:10px;padding:20px;align-self:stretch}.inspector-heading{display:flex;justify-content:space-between;gap:10px;align-items:center}.inspector-heading .eyebrow{font-size:9px;letter-spacing:1.5px}.inspector-heading>span:last-child{font-size:10px;color:#7c8a6f}.inspector h3{font-size:20px;font-weight:550;margin:16px 0 22px;letter-spacing:-.5px}.note-section{margin-bottom:22px}.note-label{font-size:9px;color:#889773;letter-spacing:1px}.inspector p{font-size:12px;line-height:1.95;margin:8px 0 0;color:#627256}.cue-card{background:#e0ead8;border-left:2px solid #789d60;border-radius:0 7px 7px 0;padding:13px;margin-top:18px}.cue-card>span{font-size:10px;color:#62824d}.cue-card p{color:#496741;font-size:12px;margin-top:5px}.avoid-card{margin-top:17px}.avoid-card>span{font-size:10px;color:#a08060}.avoid-card p{font-size:11px;color:#8b8775}.body-explainer{display:grid;grid-template-columns:275px 1fr;gap:45px;margin:34px 0;padding:31px 10px;border-bottom:1px solid #d9dfd2}.body-heading h2{font-size:24px;font-weight:500;line-height:1.55;margin:12px 0}.body-heading p{font-size:11px;color:#819078;line-height:1.9}.region-tabs{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:23px}.region-tabs button{padding:9px 15px;border:1px solid #d8ded0;border-radius:20px;background:transparent;color:#74866a;font-size:11px}.region-tabs button[aria-pressed=true]{background:#e2e9d8;border-color:#9caf86;color:#4c6d3c}.region-content h3{font-size:18px;font-weight:550;margin:0 0 13px}.region-content>p{font-size:13px;color:#718068;line-height:2;max-width:840px}.region-footnote{font-size:10px;color:#939b89;border-top:1px solid #dfe3d6;padding-top:14px;line-height:1.9}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:16px}.section-heading h2{font-size:24px;font-weight:500;margin:12px 0 22px}.section-heading>span{font-size:11px;color:#8b947e}.drill-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.drill-card{border:1px solid #d9dfd0;border-radius:10px;background:#f9faf4;padding:23px;display:flex;flex-direction:column}.drill-number{font-size:11px;font-weight:550;letter-spacing:1px;color:#8c9c7a}.drill-card h3{font-size:17px;font-weight:550;margin:14px 0}.drill-card p{font-size:12px;color:#7c8871;line-height:1.95;margin:4px 0 14px}.drill-card .check{color:#657d55}.drill-card .transfer{font-size:11px;color:#8a927c;border-top:1px solid #e4e8da;padding-top:12px}.drill-card button{margin-top:auto;align-self:flex-start;border:0;background:transparent;border-bottom:1px solid #9aaa87;color:#527340;padding:5px 0;font-size:11px}.boundaries{display:grid;grid-template-columns:1fr 1fr;gap:38px;margin-top:34px;border-top:1px solid #d9dfd0;padding:22px 0}.boundaries h3{font-size:12px;font-weight:550;color:#7e826d}.boundaries p{font-size:11px;line-height:1.9;color:#939784}.sources{border-top:1px solid #d9dfd0;padding:17px 0;font-size:11px;color:#7c8a70}.sources summary{cursor:pointer;color:#5f7e4c}.sources p{line-height:1.8}.sources a{display:inline-block;margin:7px 24px 7px 0;font-size:11px;color:#627f52}footer{border-top:1px solid #d4dccc;padding:24px 0 30px;display:flex;justify-content:space-between;color:#9aA28e;font-size:9px;letter-spacing:1px}.loader{position:absolute;inset:0;background:#fafbf5f5;border-radius:16px;display:flex;align-items:center;justify-content:center;flex-direction:column;z-index:4;padding:35px;text-align:center}.loader strong{font-size:18px;font-weight:500}.loader p{font-size:12px;color:#7c8975}.loader-dot{width:25px;height:25px;border:2px solid #cbd8be;border-top-color:#4f7751;border-radius:50%;margin-bottom:18px;animation:spin 1s linear infinite}.loader button{background:#35664b;color:white;border:0;padding:10px 20px;border-radius:7px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@keyframes spin{to{transform:rotate(360deg)}}
@media(min-width:1450px){.viewport{height:405px}.workspace-grid{grid-template-columns:minmax(0,1fr) 330px}.inspector p{font-size:13px}}
@media(max-width:1150px){.shell{padding:0 25px}.workspace-grid{grid-template-columns:minmax(0,1fr) 265px;gap:16px}.workbench{padding:20px}.viewport{height:325px}.model-heading{padding:12px 9px 0;gap:7px}.model-heading h3{font-size:11px}.model-heading div>span{font-size:8px}.model-letter{width:23px;height:25px}.focus-button{font-size:8px}.inspector{padding:16px}.scene-caption{font-size:7px;padding:10px 7px}.legend{gap:10px;font-size:9px}.intro h1{font-size:29px}.layer-controls>span{margin-left:0}.body-explainer{grid-template-columns:220px 1fr;gap:25px}.drill-card{padding:19px}}
@media(max-width:950px){.masthead-note{display:none}.workspace-grid{grid-template-columns:1fr}.viewport{height:365px}.inspector{display:grid;grid-template-columns:1fr 1fr;gap:0 25px}.inspector-heading,.inspector h3{grid-column:1/-1}.inspector h3{margin:13px 0}.note-section{margin-bottom:5px}.cue-card,.avoid-card{margin-top:13px}.model-heading h3{font-size:14px}.model-heading div>span{font-size:10px}.focus-button{font-size:10px}.scene-caption{font-size:9px}.intro-note{min-width:180px;padding-left:18px}.intro-note strong{font-size:14px}.intro h1{font-size:27px}.drill-card h3{font-size:15px}}
@media(max-width:650px){.shell{padding:0 16px}.masthead{height:80px}.brand{font-size:20px}.brand-symbol{width:36px;height:39px}.brand small{font-size:9px;letter-spacing:2px}.edition{font-size:8px;letter-spacing:1px}.intro{padding:30px 0 25px}.intro h1{font-size:29px;letter-spacing:-1px}.intro h1 em{display:block}.intro>.intro-note{display:none}.intro p{font-size:12px}.intro .eyebrow{font-size:8px}.chapters{gap:6px}.chapters button{padding:12px 10px;gap:7px;font-size:10px;flex:1;justify-content:center}.chapters button b{font-size:9px}.workbench{padding:15px 11px;border-radius:12px}.workspace-heading{display:block;margin:0 5px 17px}.workspace-heading h2{font-size:20px;line-height:1.5}.workspace-heading p{font-size:11px}.model-badge{display:inline-block;margin-top:11px;font-size:9px}.view-toolbar{gap:9px;flex-wrap:wrap;margin-left:5px}.view-toolbar button{font-size:10px;padding:7px 9px}.view-toolbar>span{font-size:10px}.model-grid{grid-template-columns:1fr;gap:11px}.viewport{height:335px}.model-heading{padding:12px 13px 0}.scene-caption{font-size:9px}.model-letter{height:29px;width:29px}.legend{font-size:9px;gap:9px 15px;line-height:1.8}.playback-top{gap:6px}.transport{gap:7px}.play-button{min-width:85px;padding:9px 12px}.transport label{font-size:9px;margin:0}.transport select{font-size:10px;padding:5px}.phase-status{font-size:10px;gap:5px}.phase-status output{font-size:9px;width:30px}.phase-buttons button{font-size:9px;padding:7px 2px}.timeline-note{font-size:9px}.layer-controls{gap:11px}.inspector{display:block;padding:20px}.inspector h3{font-size:21px;margin:13px 0 20px}.note-section{margin-bottom:19px}.inspector p{font-size:13px}.cue-card p{font-size:13px}.avoid-card p{font-size:12px}.body-explainer{grid-template-columns:1fr;gap:14px;margin:20px 0;padding:18px 4px 24px}.body-heading h2{font-size:22px}.body-heading h2 br{display:none}.body-heading p br{display:none}.region-tabs{gap:5px;margin-bottom:17px}.region-tabs button{font-size:10px;padding:8px 11px}.region-content h3{font-size:17px;line-height:1.6}.section-heading{display:block}.section-heading h2{font-size:22px;margin-bottom:10px}.section-heading>span{display:block;margin-bottom:17px}.drill-grid{grid-template-columns:1fr;gap:11px}.drill-card{padding:22px}.drill-card h3{font-size:18px}.drill-card p{font-size:13px}.boundaries{grid-template-columns:1fr;gap:4px}.boundaries p{font-size:11px}.sources a{display:block}footer{font-size:8px;gap:15px;letter-spacing:0;line-height:1.6}.scene-live{font-size:8px}}
@media(prefers-reduced-motion:reduce){.loader-dot{animation:none}}