:root{color-scheme:dark;--bg:#10161f;--panel:#151d28;--stage:#111923;--line:#293340;--muted:#97a7b8;--text:#edf3f8;--accent:#70e0c8;--accent-dim:rgba(112,224,200,.10);font:16px/1.6 "Segoe UI","Microsoft YaHei","PingFang SC",sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}button,a,input{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:disabled{opacity:.38;cursor:wait}button:focus-visible,a:focus-visible,input:focus-visible,#viewport:focus-visible{outline:2px solid var(--accent);outline-offset:4px}button[hidden],[hidden]{display:none!important}svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.svg-defs{position:absolute;width:0;height:0;overflow:hidden}button{color:inherit}h1,h2,h3,p{margin:0}a{color:inherit;text-decoration:none}.topbar{height:88px;display:flex;align-items:center;justify-content:space-between;padding:0 30px;border-bottom:1px solid var(--line);gap:20px;background:#121923}.brand{display:flex;align-items:center;gap:14px}.brand-mark{width:44px;height:44px;border-radius:12px;background:var(--accent);color:#102b27;display:grid;place-items:center}.brand-mark svg{width:27px;height:27px}.brand strong{display:block;font-size:20px;font-weight:650;letter-spacing:.04em}.brand small{font-size:11px;letter-spacing:.14em;color:var(--muted);display:block;margin-top:2px}.brand small b{margin:0 7px;color:var(--accent)}.main-actions{display:flex;gap:10px;align-items:center}.btn{display:inline-flex;justify-content:center;align-items:center;gap:9px;min-height:44px;padding:9px 17px;border:1px solid #3a4757;background:#202b38;border-radius:8px;font-size:14px;font-weight:550;transition:background .16s,border-color .16s,color .16s}.btn:not(:disabled):hover{background:#2c3a4b;border-color:#667b8b}.btn.primary{background:var(--accent);border-color:var(--accent);color:#10352d}.btn.primary:not(:disabled):hover{background:#97edd9;border-color:#97edd9}.icon-btn{width:44px;padding:10px}.workbench{display:grid;grid-template-columns:224px minmax(360px,1fr) 304px;min-height:650px;height:calc(100svh - 88px)}.parts-panel,.detail-panel{background:var(--panel);overflow-y:auto;scrollbar-width:thin;scrollbar-color:#3c4b5a transparent}.parts-panel{border-right:1px solid var(--line);padding:26px 16px 22px;display:flex;flex-direction:column}.panel-heading{display:flex;align-items:center;justify-content:space-between;padding:0 8px}.panel-heading h2{font-size:16px;font-weight:600}.count{font-size:12px;color:var(--accent);border:1px solid #335348;background:#1b302f;padding:0 7px;border-radius:4px}.panel-subtitle{font-size:12px;color:var(--muted);padding:6px 8px 20px}.part-list{display:flex;flex-direction:column;gap:5px}.part-btn{width:100%;display:flex;gap:12px;text-align:left;align-items:center;padding:12px 11px;min-height:60px;background:transparent;border:1px solid transparent;border-radius:8px;transition:background .15s}.part-btn:hover{background:#202e3a}.part-btn.active{background:var(--accent-dim);border-color:#38665f}.part-icon{display:grid;place-items:center;color:#97adbd;width:30px;flex-shrink:0}.part-btn.active .part-icon{color:var(--accent)}.part-copy{flex:1}.part-copy strong{display:block;font-size:14px;font-weight:550}.part-copy small{font-size:11px;color:#8e9eaf;display:block;margin-top:1px;letter-spacing:.025em}.part-index{font-size:11px;color:#788a9d;font-variant-numeric:tabular-nums}.part-btn.active .part-index{color:var(--accent)}.learning-note{margin:auto 9px 0;padding-top:30px}.eyebrow{font-size:11px;letter-spacing:.14em;color:var(--muted);font-weight:550}.learning-note p{font-size:13px;line-height:1.9;color:#aab8c7;margin-top:9px}.note-rule{height:1px;background:var(--line);margin:18px 0 12px}.small-meta{font-size:11px;color:#718499}.viewer-panel{min-width:0;background:var(--stage);display:flex;position:relative;flex-direction:column;overflow:hidden}.viewer-heading{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:26px 28px 10px;z-index:2;pointer-events:none}.viewer-heading .eyebrow{font-size:10px;letter-spacing:.18em;color:#738b9d}.viewer-heading h1{font-size:23px;font-weight:550;letter-spacing:.02em;margin-top:5px}.view-badge{border:1px solid #354a58;color:#a8c4d0;background:#1b2a35;border-radius:5px;padding:4px 9px;font-size:12px;white-space:nowrap}.viewport{position:relative;flex:1;min-height:300px;overflow:hidden;outline-offset:-4px!important;background:radial-gradient(ellipse at 50% 42%,#233744 0%,#172530 40%,#111923 76%)}.viewport canvas{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none}.canvas-labels{position:absolute;inset:0;pointer-events:none;z-index:2;overflow:hidden}.model-label{position:absolute;left:0;top:0;display:flex;align-items:center;gap:6px;border-radius:5px;border:1px solid #425566;background:rgba(17,27,37,.9);padding:4px 8px;color:#c2d1dd;font-family:inherit;font-size:13px;line-height:1.5;white-space:nowrap;pointer-events:auto;will-change:transform;box-shadow:0 3px 14px #0003}.model-label::before{content:"";width:4px;height:4px;border:1px solid #9db2c1;border-radius:50%;display:block}.model-label.active{border-color:var(--accent);color:var(--accent);background:#18322fe8}.model-label.active::before{background:var(--accent);border-color:var(--accent)}.viewer-tools{position:absolute;bottom:20px;left:24px;z-index:3;display:flex;gap:3px;align-items:center;padding:5px;border-radius:8px;background:#15202de8;border:1px solid #3a4a5a;box-shadow:0 6px 25px #0003}.tool{width:36px;height:36px;border:0;display:grid;place-items:center;border-radius:5px;background:transparent;color:#a8b9c9}.tool:hover{background:#2d3d4d;color:white}.tool.active{background:#24463f;color:var(--accent)}.tool-divider{height:18px;width:1px;background:#364553;margin:0 3px}.axis-key{position:absolute;right:24px;bottom:35px;color:#6e859a;font-size:11px;display:flex;align-items:center;gap:7px;pointer-events:none}.axis-y{width:3px;height:12px;background:#70a483;display:inline-block}.explosion-control{margin:0 26px 15px;padding:15px 18px 11px;border:1px solid #30404d;border-radius:9px;background:#192430}.slider-top{display:flex;align-items:center;justify-content:space-between;font-size:13px}.slider-top output{color:var(--accent);font:14px/1.5 ui-monospace,monospace}.slider-row{display:flex;align-items:center;gap:13px;margin-top:7px}.slider-row span{font-size:11px;color:#8a9fb1}.slider-row input{flex:1;min-width:50px;accent-color:var(--accent);height:24px;cursor:ew-resize}.viewer-footer{display:flex;align-items:center;justify-content:space-between;gap:12px;border-top:1px solid #25313d;padding:12px 25px;color:#879caf;font-size:11px}.mouse-help span{margin:0 9px;color:#526a7d}.touch-help{display:none}#model-status{color:#9eafbe;text-align:right}.detail-panel{padding:27px 25px 25px;border-left:1px solid var(--line)}.detail-top{display:flex;align-items:center;justify-content:space-between}.detail-top .eyebrow{font-size:12px;letter-spacing:.06em}.detail-number{font:12px ui-monospace,monospace;color:#788fa5}.detail-hero{display:flex;align-items:center;justify-content:space-between;margin:27px 0 18px}.detail-icon{width:54px;height:54px;border:1px solid #3b5c59;border-radius:12px;background:#1c3435;color:var(--accent);display:grid;place-items:center}.detail-icon svg{width:30px;height:30px}.category{font-size:12px;color:#a2bbcb;padding:4px 8px;border-radius:4px;background:#24313e}.detail-panel h2{font-size:30px;letter-spacing:.04em;font-weight:550;line-height:1.4}.english-name{font-size:11px;letter-spacing:.15em;color:#7f96aa;margin-top:6px}.detail-summary{font-size:16px;line-height:1.85;color:#c1cdd8;margin:22px 0}.inspect-button{width:100%;justify-content:flex-start;border-color:#35544e;background:#1c3433;color:var(--accent);padding:10px 11px}.inspect-button span{flex:1;text-align:left;font-size:13px}.inspect-arrow{width:17px}.detail-section{margin-top:25px;padding-top:22px;border-top:1px solid var(--line)}.detail-section h3{font-size:14px;font-weight:600;color:#e0e8f0;margin-bottom:12px}.detail-section ul{padding:0;margin:0;list-style:none}.detail-section li{font-size:14px;color:#acbdcd;line-height:1.8;padding-left:16px;position:relative;margin:9px 0}.detail-section li::before{content:"";position:absolute;left:0;top:10px;width:4px;height:4px;background:#699e9d}.connection-tag{display:inline-flex;color:#8ecdbd;background:#1e3435;font-size:12px;border-radius:4px;padding:3px 8px;margin-bottom:9px}.detail-section p{font-size:14px;line-height:1.9;color:#aabac9}.takeaway{margin-top:25px;padding:17px;border-left:2px solid var(--accent);background:#1a2c32}.takeaway>span{font-size:12px;color:var(--accent)}.takeaway p{font-size:14px;line-height:1.8;margin-top:8px;color:#c0d0da}.model-note{font-size:12px;color:#7b92a6;line-height:1.8;margin-top:20px}.loading{position:absolute;inset:0;z-index:6;display:flex;flex-direction:column;align-items:center;justify-content:center;background:#111923ed;text-align:center;padding:35px;gap:15px}.loading strong{font-size:18px;font-weight:550}.loading p{font-size:14px;max-width:390px;color:var(--muted)}.loading-symbol{width:62px;height:62px;display:grid;place-items:center;background:#1c3737;border:1px solid #40635d;border-radius:16px;color:var(--accent);margin-bottom:7px}.loading-symbol svg{width:34px;height:34px}.load-track{width:180px;height:3px;background:#293d48;margin-top:10px}.load-track span{display:block;background:var(--accent);height:100%;width:5%;transition:width .2s}.loading.failed .load-track{display:none}.loading.failed .loading-symbol{color:#e9bd8a}.no-script{position:absolute;inset:0;padding:80px 30px;background:var(--bg);z-index:10}.back-button{position:absolute;top:16px;left:24px;z-index:3;font-size:12px;background:#172d31e8}.back-button svg{transform:rotate(180deg);width:17px}.toast{position:fixed;bottom:26px;left:50%;transform:translate(-50%,15px);border:1px solid #42645f;border-radius:8px;background:#233d38;color:#dcf4eb;padding:11px 19px;box-shadow:0 8px 30px #0004;z-index:20;font-size:14px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;max-width:90vw}.toast.show{opacity:1;transform:translate(-50%,0)}
@media(min-width:1650px){.workbench{grid-template-columns:256px minmax(450px,1fr) 344px}.parts-panel{padding:30px 22px}.detail-panel{padding:30px}.part-btn{min-height:67px}.viewer-heading{padding:30px 34px 10px}.viewer-heading h1{font-size:26px}.model-label{font-size:14px}}
@media(max-width:1150px){.workbench{grid-template-columns:190px minmax(300px,1fr) 268px}.parts-panel{padding:23px 10px}.detail-panel{padding:24px 19px}.part-btn{gap:8px;padding:11px 8px}.viewer-heading{padding:24px 20px 10px}.viewer-heading h1{font-size:20px}.viewer-footer{padding:12px 16px}.mouse-help span{margin:0 5px}.axis-key{display:none}.explosion-control{margin:0 18px 15px}.view-badge{font-size:11px}}
@media(max-width:1000px){.topbar{padding:0 20px;height:82px}.workbench{height:auto;min-height:0;grid-template-columns:minmax(350px,1fr) 285px}.parts-panel{grid-column:1/-1;grid-row:1;border-right:0;border-bottom:1px solid var(--line);padding:16px 18px 12px}.panel-heading{justify-content:flex-start;gap:12px}.panel-subtitle{display:none}.part-list{flex-direction:row;overflow-x:auto;padding:11px 3px 5px;scrollbar-width:thin}.part-btn{width:auto;min-width:143px;min-height:52px;flex-shrink:0}.part-index{display:none}.learning-note{display:none}.viewer-panel{min-height:660px}.detail-panel{max-height:660px}.viewer-tools{left:18px}.viewer-heading{padding-top:22px}.viewer-footer{flex-wrap:wrap;gap:4px}.brand strong{font-size:18px}}
@media(max-width:700px){.topbar{height:auto;min-height:124px;padding:18px 16px 14px;flex-wrap:wrap;gap:17px}.brand{gap:11px}.brand-mark{width:37px;height:37px;border-radius:9px}.brand strong{font-size:18px}.brand small{font-size:10px}.main-actions{width:100%;gap:8px}.main-actions .btn:not(.icon-btn){flex:1}.header-reset{display:inline-flex}.workbench{display:flex;flex-direction:column}.parts-panel{padding:12px 12px 7px}.panel-heading h2{font-size:14px}.part-list{gap:6px}.part-btn{min-width:133px;border:1px solid #283847;padding:9px;gap:7px}.part-copy strong{font-size:13px}.part-copy small{font-size:10px}.part-icon svg{width:19px}.viewer-panel{min-height:560px;height:69svh;max-height:780px}.viewer-heading{padding:18px 17px 7px}.viewer-heading h1{font-size:18px}.viewer-heading .eyebrow{font-size:9px}.view-badge{font-size:11px;padding:3px 6px}.viewport{min-height:325px}.viewer-tools{bottom:16px;left:16px}.tool{height:35px;width:35px}.model-label{font-size:11px;padding:3px 6px}.explosion-control{margin:0 15px 12px;padding:11px 14px 8px}.viewer-footer{font-size:10px;padding:10px 16px}.touch-help{display:block}.mouse-help{display:none}.detail-panel{border-left:0;border-top:1px solid var(--line);max-height:none;overflow:visible;padding:25px 24px 35px}.detail-hero{margin:20px 0 16px}.detail-panel h2{font-size:28px}.detail-summary{margin:18px 0}.detail-section li,.detail-section p,.takeaway p{font-size:16px}.inspect-button{min-height:46px}.inspect-button span{font-size:14px}.model-note{font-size:13px}.back-button{top:10px;left:16px}.toast{bottom:16px;font-size:13px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}