.overlay{--menu-ink:#f6ead4;--menu-muted:#bfbab0;--menu-accent:#f18066;--menu-line:#f6ead42e;--menu-shade:rgb(0 0 0 / 75%);--menu-panel:#202020;--menu-border:#494745;--menu-button:#41413e;--menu-button-border:#77756c;--menu-button-hover:#50504b;--menu-top:7cqh;--menu-bottom:17cqh;--control-height:clamp(36px,4.2cqw,56px);position:absolute;top:0;left:0;width:1280px;height:720px;container-type:size;transform:scale(var(--hud-scale,1));transform-origin:top left;z-index:3;background:var(--menu-shade);color:var(--menu-ink)}.overlay:has(.car-select:not([hidden])){background:transparent}.game-frame:is([data-phase=paused],[data-phase=finished]) .overlay{z-index:5}.overlay:before{content:"";position:absolute;left:4.5cqw;right:4.5cqw;top:3.5cqh;height:3px;background:var(--menu-line);pointer-events:none}.intro{position:absolute;left:4.5cqw;top:var(--menu-top);bottom:var(--menu-bottom);width:42.5cqw;z-index:1;display:flex;flex-direction:column}.menu-label{color:var(--menu-muted);font-size:clamp(10px,1.05cqw,14px);font-weight:600;letter-spacing:2px}.route-select{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1cqw}.route-select>.menu-label,.difficulty-select>.menu-label{grid-column:1/-1;margin-bottom:.3cqw}.route-select button,.difficulty-select button,.car-buttons button{position:relative;min-width:0;padding:0;border:1px solid var(--menu-button-border);border-radius:3px;background:var(--menu-button);color:var(--menu-ink);overflow:hidden;text-align:center;min-height:var(--control-height);transition:transform .18s,background .18s,border-color .18s,box-shadow .18s}.route-select button:hover,.difficulty-select button:hover,.car-buttons button:hover{transform:translateY(-3px);background:var(--menu-button-hover);border-color:#e5cda4}.route-select button[aria-pressed=true],.difficulty-select button[aria-pressed=true],.car-buttons button[aria-pressed=true]{background:#4b3730;border-color:var(--menu-accent);box-shadow:3px 3px #f18066;transform:translateY(-3px)}.route-name{display:block;padding:1cqw .8cqw;font-size:clamp(12px,1.5cqw,20px);font-weight:650;letter-spacing:1px;white-space:nowrap}.route-select button[aria-pressed=true] .route-name,.difficulty-select button[aria-pressed=true],.car-buttons button[aria-pressed=true]{color:#ffb59d}.intro-copy{margin:1.2cqw 0 2.5cqw;color:var(--menu-muted);font-size:clamp(11px,1.25cqw,17px);line-height:1.6;letter-spacing:1px}.difficulty-select{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1cqw;margin:0}.difficulty-select button,.car-buttons button{padding:1cqw .8cqw;font-size:clamp(12px,1.5cqw,20px);font-weight:650;letter-spacing:1px}.launch-area{margin-top:auto;padding-top:2cqw}.best-time{display:flex;align-items:baseline;gap:1cqw;margin:0 0 1.5cqw;color:var(--menu-muted);font-size:clamp(9px,.85cqw,12px);letter-spacing:2px}.best-time strong{font-family:Consolas,Liberation Mono,monospace;font-size:clamp(16px,2cqw,27px);font-weight:500;font-variant-numeric:tabular-nums;letter-spacing:1px;color:#f9e6bf}.best-time[data-record=first],.best-time[data-record=new-best]{color:#ffae92;animation:record-flash .65s ease-out}.best-time[data-record=first] strong,.best-time[data-record=new-best] strong{color:#ffae92}.menu-buttons{display:flex;flex-wrap:wrap;gap:1cqw;padding:0 .6cqw}.primary{display:flex;align-items:center;justify-content:center;gap:24px;width:66.6667%;min-height:clamp(42px,5cqw,68px);padding:1cqw 1.7cqw;background:var(--menu-accent);color:#192e31;border-radius:3px;font-size:clamp(17px,1.9cqw,25px);font-weight:750;letter-spacing:3px;transform:skew(-12deg);box-shadow:0 4px #9c4e40;transition:transform .15s,background .15s,box-shadow .15s}.primary:hover{background:#ff9a7e;transform:translateY(-2px) skew(-12deg);box-shadow:0 6px #9c4e40}.primary:active{transform:translateY(3px) skew(-12deg);box-shadow:0 1px #9c4e40}.menu-secondary{min-width:0;min-height:var(--control-height);padding:1cqw;background:var(--menu-button);color:var(--menu-ink);border:1px solid var(--menu-button-border);border-radius:3px;font-size:clamp(12px,1.3cqw,17px);transition:background .15s,border-color .15s}.menu-secondary:hover{background:var(--menu-button-hover);border-color:var(--menu-accent)}.menu-controls{position:absolute;left:4.5cqw;right:4.5cqw;bottom:3.5cqh;z-index:1;border-top:1px solid var(--menu-line);padding-top:1.2cqw;text-align:left}.controls-copy{display:flex;flex-wrap:wrap;column-gap:2cqw;row-gap:.4cqw;color:var(--menu-muted);font-size:clamp(10px,1.1cqw,15px);line-height:1.8;letter-spacing:.4px;margin:0}.controls-copy>span{white-space:nowrap}.controls-copy kbd{font:inherit;font-family:Consolas,Liberation Mono,monospace;color:#f6ead4}.car-select{position:absolute;right:4.5cqw;top:var(--menu-top);bottom:var(--menu-bottom);width:44cqw;border:0;border-radius:4px;background:transparent;display:flex;flex-direction:column}.car-select:after{content:"";position:absolute;inset:0;border:1px solid var(--menu-border);border-radius:4px;pointer-events:none;z-index:2}.car-heading{position:relative;z-index:1;display:flex;justify-content:space-between;align-items:center;gap:10px;padding:1.4cqw 1.7cqw;border-bottom:1px solid var(--menu-border);border-radius:4px 4px 0 0;background:var(--menu-panel);flex-shrink:0}.car-identity{text-align:left;min-width:0}.car-select #car-subtitle{font-size:clamp(10px,1cqw,14px);letter-spacing:2px;color:var(--menu-muted);margin:0 0 .5cqw}.car-select h2{font-size:clamp(19px,2.6cqw,36px);font-weight:650;letter-spacing:2px;line-height:1.2;margin:0;color:#f9e8c9}.car-eyebrow{margin:0;font-size:clamp(10px,1.1cqw,16px);font-family:Consolas,monospace;color:#ffaf93;white-space:nowrap;letter-spacing:1px}.car-preview{width:100%;flex:1;min-height:0;pointer-events:none;box-shadow:0 0 0 1280px var(--menu-shade)}.car-footer{position:relative;z-index:1;padding:1.2cqw 1.7cqw 1.6cqw;border-top:1px solid var(--menu-border);border-radius:0 0 4px 4px;background:var(--menu-panel);flex-shrink:0}#car-description{font-size:clamp(11px,1.2cqw,16px);letter-spacing:.6px;color:var(--menu-muted);margin:0 0 1.2cqw;line-height:1.5;text-align:center}.car-buttons{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1cqw}.game-frame:is([data-phase=paused],[data-phase=finished]) .intro{left:50%;top:46%;bottom:auto;transform:translate(-50%,-50%);width:40cqw}.game-frame:is([data-phase=paused],[data-phase=finished]) .launch-area{margin:0;padding-top:0}.game-frame[data-phase=paused] .intro{left:13cqw;top:50%;width:33cqw;transform:translateY(-50%)}.game-frame[data-phase=paused] .menu-buttons{display:grid;grid-template-columns:minmax(0,1fr);gap:2cqw}.game-frame[data-phase=paused] .primary{grid-column:1/-1;width:100%;min-height:6cqw;font-size:2.4cqw}.game-frame[data-phase=paused] .menu-secondary{min-height:4cqw;font-size:1.3cqw}.game-frame[data-phase=finished] .intro{width:48cqw}.game-frame[data-phase=finished] .intro-copy{font-size:clamp(20px,2.7cqw,38px);color:#f9e8c9;margin:0 0 2.5cqw}.game-frame[data-phase=finished] .best-time{margin-bottom:3cqw}.game-frame[data-phase=finished] .menu-buttons{display:grid;grid-template-columns:minmax(0,1fr);width:50%;gap:1.5cqw}.game-frame[data-phase=finished] .primary{width:100%;min-height:var(--control-height)}.game-frame[data-phase=finished] .menu-controls{display:none}.overlay button:focus-visible{outline:2px solid #fff0c9;outline-offset:4px}@keyframes record-flash{0%{background:#f1806640}to{background:transparent}}@media(prefers-reduced-motion:reduce){.overlay button{transition:none}.best-time{animation:none}}:root{font-family:Inter,Segoe UI,Microsoft YaHei,sans-serif;color:#fff5dc;background:#111d25;font-synthesis:none;text-rendering:optimizeLegibility;color-scheme:dark}.game-frame[data-phase=finishing] .route-label{visibility:hidden}*{box-sizing:border-box}body{margin:0;overflow:hidden}button{font:inherit;cursor:pointer;color:inherit;border:0}button:focus-visible{outline:3px solid #ffe09b;outline-offset:4px}button:disabled{opacity:.35;cursor:default}[hidden]{display:none!important}#app{height:100svh;width:100vw;display:grid;place-items:center}.game-frame{position:relative;width:var(--game-width);height:min(100svh,56.25vw);overflow:hidden;background:#7dbacb;isolation:isolate;user-select:none;-webkit-user-select:none;touch-action:none;container-type:size}.canvas-host,.canvas-host canvas{position:absolute;inset:0;width:100%;height:100%}.canvas-host canvas{display:block}.topbar{position:absolute;inset:24px 30px auto;display:flex;justify-content:space-between;align-items:flex-start;z-index:4;text-shadow:0 1px 8px #203a4b55}.route-label{text-align:center;position:absolute;top:0;left:50%;transform:translate(-50%)}.route-label span{display:block;font-size:9px;letter-spacing:2px;opacity:.8}.route-label strong{display:block;font-size:17px;letter-spacing:3px;margin-top:6px}.utilities{display:flex;gap:8px;margin-left:auto;pointer-events:auto}.utilities button{display:grid;place-items:center;padding:0 0 2px;line-height:1;text-align:center;background:#173b424d;border:1px solid #fff4da44;width:38px;height:38px;border-radius:50%;font-size:27px;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.utilities button:hover{background:#25494a99}.race-hud{position:absolute;inset:0;pointer-events:none;z-index:2}.time-block{position:absolute;top:56px;left:32px;line-height:1;transform:translateY(calc(-50% - 16px))}.time-block span{display:block;font-size:9px;letter-spacing:2px;opacity:.8}.time-block strong{font-size:23px;font-weight:500;font-variant-numeric:tabular-nums}.speed-block{position:absolute;top:88px;right:40px;display:flex;align-items:baseline;gap:14px;text-align:right}.speed-block>strong{display:inline-block;width:3ch;font-family:Cascadia Mono,Consolas,Liberation Mono,monospace;font-size:76px;font-weight:700;font-style:normal;transform:skew(-12deg);transform-origin:bottom 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0;width:50%;z-index:2;pointer-events:auto;touch-action:none;-webkit-touch-callout:none}.game-shell.touch-device:has(.game-frame:is([data-phase=running],[data-phase=countdown]):not(.free-camera))>#steer-pad{display:block}.steering-stick{display:none;position:absolute;left:var(--stick-x);top:var(--stick-y);width:146px;height:72px;border:1px solid #f2e5c74d;border-radius:40px;background:#12384138;transform:translate(-50%,-50%) scale(var(--stick-scale,1));pointer-events:none}.steering-active .steering-stick{display:block}.steering-track{position:absolute;left:28px;right:28px;top:50%;height:2px;transform:translateY(-50%);background:#f3dfb440}.steering-thumb{position:absolute;left:calc(50% - 26px);top:calc(50% - 26px);width:52px;height:52px;border:2px solid #ffe9bc99;border-radius:50%;background:#f3dfb438;box-shadow:0 2px 12px 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button{width:56px;height:56px}.rotate-prompt,.error-prompt{position:absolute;inset:0;background:#132d39f5;z-index:20;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:24px;gap:12px}.rotate-prompt>span{font-size:64px;color:#f7ce98}.rotate-prompt p{font-size:12px;color:#b2c4c9}.error-prompt{line-height:1.9}.start-countdown{position:absolute;inset:0;display:grid;place-items:center;transform:translateY(-48px) skew(-12deg);font-size:112px;font-weight:850;letter-spacing:6px;color:#ffe2a7;text-shadow:3px 4px 0 #173b42;pointer-events:none}.touch-device[data-phase=countdown] .touch-controls{display:block}.race-best{position:absolute;top:64px;left:32px;display:flex;align-items:baseline;gap:10px;line-height:1;color:#f8dfac}.race-best>span{font-size:10px;letter-spacing:2px;opacity:.85}.race-best>strong{font-family:Consolas,Liberation Mono,monospace;font-size:18px;font-weight:500;font-variant-numeric:tabular-nums;letter-spacing:1px}.utilities #test{font-size:22px;font-weight:650;letter-spacing:0}.utilities #sound,.utilities #fullscreen{font-size:34px}.test-option+.test-option{margin-top:12px}.test-option small{display:block;margin-top:7px;font-size:12px;line-height:1.5;color:#d7e5e0}.game-frame:has(.test-dialog[open]) .overlay{display:none}.free-camera .overlay,.free-camera .touch-controls,.free-camera .race-hud,.free-camera .route-label,.free-camera #pause{display:none!important}.free-camera .canvas-host canvas{cursor:grab}.free-camera .canvas-host canvas:active{cursor:grabbing}.camera-tools{position:absolute;bottom:24px;left:24px;right:24px;width:fit-content;max-width:calc(100% - 48px);display:flex;align-items:center;gap:10px;flex-wrap:wrap;z-index:6;padding:10px 12px;background:#102b32ed;border:1px solid #d5e7df40;border-radius:10px;font-size:12px}.camera-tools strong{font-size:12px;font-weight:600;margin-right:8px}.camera-tools button{font-size:15px;background:#ffffff0d;border:1px solid #d5e7df40;border-radius:6px;padding:9px 12px;min-height:40px}.camera-tools button:hover{background:#ffffff20}.touch-device .camera-tools button{min-height:44px}.performance-panel{position:absolute;top:88px;right:30px;z-index:5;width:300px;padding:14px 16px;border:1px solid #d5e7df40;border-radius:10px;background:#102b32eb;box-shadow:0 8px 30px #061d2933;pointer-events:none;font-size:11px;font-variant-numeric:tabular-nums;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.performance-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.performance-heading strong{font-size:13px;letter-spacing:2px}.performance-heading span{font-size:9px;color:#a5c2bf}.performance-panel dl{display:grid;grid-template-columns:1fr 1fr;gap:10px 16px;margin:0}.performance-panel dl>div{min-width:0}.performance-panel dt{font-size:10px;color:#a5c2bf;margin-bottom:3px}.performance-panel dd{margin:0;font-weight:650;color:#f8dda8;white-space:nowrap}.performance-panel p{margin:12px 0 0;font-size:9px;line-height:1.5;color:#a5c2bf}.test-dialog{width:min(480px,calc(100vw - 32px));max-height:calc(100svh - 32px);margin:auto;padding:20px 72px 20px 20px;border:1px solid #d5e7df40;border-radius:16px;background:#112f37;color:#fff5dc;overflow:auto;touch-action:pan-y}.test-dialog::backdrop{background:transparent}.test-heading{position:absolute;top:20px;right:14px}.test-close{width:44px;height:44px;border:1px solid #d5e7df40;border-radius:50%;background:#ffffff08;font-size:26px;line-height:1}.test-close:hover{background:#ffffff18}.test-option{margin-top:0;display:flex;align-items:center;gap:16px;position:relative;padding:20px 16px;background:#ffffff08;border:1px solid #d5e7df26;border-radius:10px;cursor:pointer}.test-option>span:first-child{flex:1}.test-option strong{font-size:15px;font-weight:600}.test-option input{position:absolute;right:16px;width:44px;height:28px;opacity:0;margin:0;cursor:pointer}.test-switch{width:44px;height:26px;border-radius:15px;background:#587278;position:relative;pointer-events:none;flex-shrink:0}.test-switch:after{content:"";position:absolute;top:4px;left:4px;width:18px;height:18px;border-radius:50%;background:#e1ece7;transition:transform .15s}.test-option input:checked+.test-switch{background:#f7d8a7}.test-option input:checked+.test-switch:after{transform:translate(18px);background:#173b42}.test-option input:focus-visible+.test-switch{outline:3px solid #ffe09b;outline-offset:4px}.hud-plane{position:absolute;top:0;left:0;width:1280px;height:720px;transform:scale(var(--hud-scale,1));transform-origin:top left;pointer-events:none}.hud-header{z-index:4}.hud-race{z-index:2}.game-shell{--game-width:min(100vw,calc(100svh * 1.77777778));position:relative;width:100vw;height:100svh;display:flex;flex-direction:column;align-items:center;justify-content:center;background:#111d25}.hud-tools{z-index:7}.game-toolbar{position:absolute;top:5px;right:30px;display:flex;align-items:center}.utilities #camera-view{width:60px;padding:0 8px 2px;border-radius:24px;font-size:21px;font-weight:650;white-space:nowrap}.utilities #camera-view:disabled{opacity:.45;cursor:default}.touch-device .utilities #camera-view{width:60px}.utilities #pause{display:grid;place-items:center}.utilities #pause:before{content:"";width:18px;height:24px;border-left:6px solid currentColor;border-right:6px solid currentColor;box-sizing:border-box}.utilities #pause[aria-label=继续]:before{width:0;height:0;border:0;border-top:12px solid transparent;border-bottom:12px solid transparent;border-left:19px solid currentColor;margin-left:4px}.game-frame{z-index:1;pointer-events:none}.overlay,.camera-tools,.test-dialog,.rotate-prompt,.error-prompt{pointer-events:auto}.free-camera .canvas-host canvas{pointer-events:auto}#auto-brake-pad{display:none;position:absolute;inset:0 0 0 auto;width:50%;z-index:0;touch-action:none;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;-webkit-tap-highlight-color:transparent}.game-shell.touch-device[data-auto-throttle=true]:has(.game-frame:is([data-phase=running],[data-phase=countdown]):not(.free-camera))>#auto-brake-pad{display:block}.game-shell[data-auto-throttle=true] .touch-pedals{display:none}#steer-pad,.touch-pedals button{-webkit-tap-highlight-color:transparent}@media(max-height:550px){.test-option{padding:14px}}.camera-tools{bottom:calc(24px * var(--hud-scale,1));left:calc(24px * var(--hud-scale,1));right:auto;max-width:1232px;transform:scale(var(--hud-scale,1));transform-origin:bottom left}.performance-panel{top:calc(88px * var(--hud-scale,1));right:calc(30px * var(--hud-scale,1));transform:scale(var(--hud-scale,1));transform-origin:top right}.rotate-prompt,.error-prompt{inset:0 auto auto 0;width:1280px;height:720px;transform:scale(var(--hud-scale,1));transform-origin:top left}