:root{--ink:#37575b;--paper:#f5f5e9;--mint:#a4d5cc;--cream:#fffcf1;--peach:#f2b7a3}*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden;overscroll-behavior:none}body{font-family:ui-rounded,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;background:var(--paper);color:var(--ink);-webkit-tap-highlight-color:transparent;user-select:none;-webkit-user-select:none}button{font:inherit;color:inherit;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent}button:focus-visible{outline:4px solid #437b84;outline-offset:5px}button{transition:transform .16s,background .2s,box-shadow .2s}button:active{transform:scale(.95)}#app{height:100%;height:100dvh;max-width:1700px;margin:auto;padding:16px 30px 18px;padding-bottom:max(18px,env(safe-area-inset-bottom));display:flex;flex-direction:column}.topbar{height:76px;flex-shrink:0;display:flex;justify-content:space-between;align-items:center;padding:0 7px 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#51696208}#scene{width:100%;height:100%;display:block;touch-action:none;cursor:grab}#scene:active{cursor:grabbing}.scene-label{position:absolute;top:20px;left:24px;display:flex;align-items:center;gap:9px;color:#7faaa5;font-size:11px;letter-spacing:2px;pointer-events:none}.tiny-bubble{width:13px;height:13px;border:2px solid #8dbdb5;border-radius:50%;display:inline-block}.label-dot{font-size:15px;color:#dfb672}.hint{position:absolute;top:23px;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;pointer-events:none;white-space:nowrap}#hint-text{font-size:23px;font-weight:800;letter-spacing:3px;color:#41696b}#hint-sub{font-size:12px;letter-spacing:3px;margin-top:7px;color:#7d9d99}#step-pips{position:absolute;top:31px;right:26px;display:flex;gap:7px}#step-pips span{width:9px;height:9px;border-radius:50%;background:#c7ded8;transition:all .4s}#step-pips .current{width:23px;border-radius:8px;background:#e2b273}#step-pips .complete{background:#7ba89a}.play-controls{min-height:122px;flex-shrink:0;display:flex;gap:24px;align-items:center;justify-content:center;padding:0 12px}.tools{display:flex;gap:12px}.tool{position:relative;border:2px solid transparent;display:flex;flex-direction:column;align-items:center;width:108px;height:114px;border-radius:26px;background:#e9ede0;font-size:15px;font-weight:700;letter-spacing:3px;line-height:1.1;padding:6px 0 12px}.tool-icon{width:76px;height:75px;display:block}.tool-icon svg{width:100%;height:100%}.tool.selected{background:#fff8e4;border-color:#e5c58d;box-shadow:0 4px 0 #e3d4ad}.tool:nth-child(2).selected{background:#e6f4f2;border-color:#9acbcd;box-shadow:0 4px 0 #bddad5}.tool:nth-child(3).selected{background:#fff0e9;border-color:#dfafa5;box-shadow:0 4px 0 #e7c9bc}.tool-tick{position:absolute;top:4px;right:9px;font-size:15px;font-style:normal;color:#5d9d8b;display:none}.tool.finished .tool-tick{display:block}.control-divider{width:1px;height:68px;background:#d9dfcf;margin:0 9px}.vehicles{display:flex;flex-direction:column;gap:5px}.choose-label{font-size:11px;letter-spacing:2px;color:#8c9b8d;text-align:center}.vehicle-options{display:flex;gap:8px}.vehicle{padding:0;border:2px solid transparent;border-radius:21px;background:transparent;width:102px;height:75px;display:grid;place-items:center}.vehicle canvas{width:98px;height:57px}.vehicle.selected{background:#e5ede0;border-color:#b7c9ae}.done-panel{position:absolute;top:25px;left:50%;transform:translateX(-50%);align-items:center;gap:12px;color:#527d70;display:flex;white-space:nowrap;background:#fffdf4ee;border-radius:22px;padding:12px 16px;box-shadow:0 6px 20px #5c7f6510}.done-panel[hidden]{display:none}.done-heart{color:#da9485;font-size:25px}.done-panel strong{font-size:20px;letter-spacing:2px}.done-panel button{border:0;border-radius:14px;background:#e6efe0;padding:10px 15px;display:flex;gap:7px;align-items:center;font-size:13px;font-weight:700}.done-panel button svg{width:17px;height:17px}.welcome{position:absolute;inset:0;background:#f3f5e9a3;backdrop-filter:blur(9px);display:grid;place-items:center;z-index:20;padding:24px}.welcome.hidden{display:none}.welcome-card{position:relative;background:#fffcf1;border-radius:42px;border:6px solid white;box-shadow:0 18px 70px #4d77732b;text-align:center;padding:54px 56px 35px;max-width:460px;width:100%;overflow:hidden}.welcome-eyebrow{font-size:12px;color:#8ca899;letter-spacing:3px}.welcome h2{font-size:43px;line-height:1.35;letter-spacing:6px;margin:22px 0 16px;color:#3f6867}.welcome p{font-size:14px;color:#8b9a8b;letter-spacing:1px;margin:0 0 28px}.welcome button{display:flex;align-items:center;justify-content:center;gap:17px;border:0;background:#a5d5c7;box-shadow:0 6px 0 #85b8a9;border-radius:24px;padding:21px 25px;width:100%;font-size:22px;font-weight:800;letter-spacing:3px}.welcome button span{font-size:20px;color:#fffcf1}.welcome-foot{display:block;font-size:10px;color:#a1a994;letter-spacing:1px;margin-top:25px}.welcome-bubbles{position:absolute;top:14px;right:14px;pointer-events:none}.welcome-bubbles i{display:block;border:2px solid #dce9df;width:30px;height:30px;border-radius:50%;position:absolute;right:0;top:0}.welcome-bubbles i:nth-child(2){width:17px;height:17px;right:34px;top:9px}.welcome-bubbles i:nth-child(3){width:12px;height:12px;right:10px;top:38px}@media(min-width:1300px){#app{padding:20px 42px 24px}.topbar{height:83px}.play-controls{gap:40px}.tool{width:125px;height:124px}.tool-icon{width:84px;height:82px}.vehicle{width:116px;height:82px}.vehicle canvas{width:112px;height:65px}}
@media(max-width:850px){#app{padding:12px 18px 14px}.topbar{height:72px}.play-controls{gap:15px;padding:0}.tool{width:94px;height:106px;border-radius:23px}.tool-icon{width:69px;height:68px}.tools{gap:9px}.control-divider{margin:0 1px}.vehicle{width:84px;height:71px}.vehicle canvas{width:82px;height:48px}.vehicle-options{gap:4px}.scene-label{font-size:9px;left:18px;top:18px;letter-spacing:1px}.hint{top:21px}#hint-text{font-size:21px}.scene-frame{border-radius:28px}#step-pips{right:18px;top:27px}}
@media(max-aspect-ratio:4/5){#app{padding:14px 18px 18px}.topbar{height:82px}.brand h1{font-size:26px}.slow-note{display:none}main{gap:15px}.scene-frame{min-height:250px}.scene-label{top:20px;font-size:10px}.hint{top:54px}#hint-text{font-size:25px}.play-controls{flex-direction:column;gap:14px;min-height:216px}.tools{gap:17px}.tool{width:112px;height:116px}.tool-icon{width:78px;height:76px}.control-divider{display:none}.vehicles{flex-direction:row;align-items:center;gap:12px}.choose-label{font-size:10px}.vehicle{width:86px;height:65px}.vehicle canvas{width:84px;height:49px}.vehicle-options{gap:8px}.done-panel{top:49px;gap:8px;flex-wrap:wrap;justify-content:center;width:85%;white-space:normal}.done-panel strong{font-size:18px}.done-panel button{font-size:12px}.done-heart{font-size:19px}}
@media(max-width:480px){#app{padding:8px 10px 11px}.topbar{height:63px;padding:0 3px 8px}.brand{gap:8px}.brand svg{width:34px;height:34px}.brand h1{font-size:22px}.brand p{font-size:9px;letter-spacing:1px;margin-top:3px}.circle-btn{width:44px;height:44px}.scene-frame{border-width:4px;border-radius:23px}.scene-label{font-size:8px;left:13px;top:14px}.hint{top:42px}#hint-text{font-size:20px}#hint-sub{font-size:10px;margin-top:5px}#step-pips{top:18px;right:13px;gap:5px}#step-pips span{width:7px;height:7px}#step-pips .current{width:18px}.play-controls{min-height:185px;gap:10px}.tools{gap:12px}.tool{width:90px;height:100px;font-size:13px}.tool-icon{width:66px;height:65px}.vehicle{width:73px;height:56px}.vehicle canvas{width:72px;height:42px}.vehicles{gap:8px}.choose-label{font-size:9px;letter-spacing:1px}.welcome-card{padding:44px 24px 28px;border-radius:34px}.welcome h2{font-size:36px}.welcome p{font-size:12px}.welcome button{font-size:21px;padding:19px}.welcome-foot{font-size:9px}.done-panel{top:42px;padding:10px}.done-panel strong{font-size:15px}.done-panel button{padding:8px 10px;font-size:11px}}
@media(max-height:560px) and (min-aspect-ratio:1/1){#app{padding:6px 14px 9px}.topbar{height:49px;padding-bottom:5px}.brand h1{font-size:20px}.brand p{display:none}.brand svg{height:31px;width:31px}.circle-btn{height:39px;width:39px}main{gap:7px}.play-controls{min-height:81px;gap:20px}.tool{width:86px;height:77px;border-radius:18px;padding:2px 0 7px;font-size:11px}.tool-icon{height:51px;width:58px}.vehicles{flex-direction:row;gap:10px}.choose-label{display:none}.vehicle{height:60px;width:80px}.vehicle canvas{width:78px;height:45px}.control-divider{height:48px}.scene-frame{border-radius:22px;border-width:4px}.hint{top:12px}#hint-text{font-size:18px}#hint-sub{font-size:10px;margin-top:3px}.scene-label{top:16px}#step-pips{top:20px}.welcome-card{padding:22px 35px;max-width:410px}.welcome h2{font-size:28px;line-height:1.2;margin:14px 0 10px}.welcome h2 br{display:none}.welcome p{font-size:12px;margin-bottom:18px}.welcome button{padding:14px;font-size:18px}.welcome-foot{margin-top:17px}.done-panel{top:10px;padding:9px 14px}.done-panel strong{font-size:17px}}
@media(prefers-reduced-motion:reduce){button{transition:none}}

.home-link{display:flex;align-items:center;gap:6px;text-decoration:none;color:#789183;font-size:22px;padding:8px 5px;min-height:44px}.home-link span{font-size:11px;letter-spacing:1px}.home-link:focus-visible{outline:3px solid #537d67;outline-offset:3px}.welcome-home{display:inline-block;margin-top:19px;color:#8b9d88;font-size:11px;text-underline-offset:4px;padding:8px}.top-actions{gap:16px}@media(max-width:480px){.top-actions{gap:9px}.home-link span{display:none}.home-link{font-size:25px;min-width:32px}}
@media(max-width:480px){.home-link{min-width:44px;justify-content:center}}