.vehicle-picture{width:100%;height:100%;display:block}.workshop-backdrop{z-index:90;background:#25385599;place-items:center;padding:12px;display:grid;position:fixed;inset:0}.vehicle-workshop{background:#f6fbff;border:5px solid #fff;border-radius:28px;grid-template-rows:60px minmax(60px,1fr) auto auto auto;gap:12px;width:min(760px,100%);height:min(740px,96dvh);padding:16px;display:grid;box-shadow:0 10px 70px #14243f77}.vehicle-workshop header,.vehicle-adjust{justify-content:space-around;align-items:center;gap:8px;display:flex}.vehicle-workshop button,.math-frame-controls button,.math-range button,.math-pages button{cursor:pointer;background:#fff;border:2px solid #c6d9ec;border-radius:16px;min-width:48px;min-height:48px;font-size:26px}.vehicle-workshop button:active{transform:scale(.92)}.vehicle-workshop button[aria-pressed=true],.math-range button[aria-pressed=true],.math-frame-controls button[aria-pressed=true]{outline:4px solid #f6ad38}.vehicle-types{grid-template-columns:repeat(8,1fr);gap:7px;display:grid}.vehicle-types button{font-size:36px}.vehicle-colors{justify-content:space-between;gap:6px;display:flex}.vehicle-colors button{border-radius:50%;width:8%;min-width:0;height:48px}.workshop-preview{min-height:0}.vehicle-adjust b{white-space:nowrap;font-size:25px}.workshop-open{background:#d4f6ed;border:0;border-radius:16px;min-width:64px;min-height:48px;font-size:30px}.math-scene{width:min(640px,100%);min-height:0;margin:auto}.math-frame-controls{justify-content:center;gap:12px;margin-bottom:6px;display:flex}.math-frame-controls button{min-height:40px;font-size:22px}.parking-groups{justify-content:center;gap:10px;display:flex}.ten-parking{background:#d5e9df;border-radius:12px;flex:1;grid-template-rows:repeat(2,1fr);grid-template-columns:repeat(5,1fr);gap:3px;padding:4px;display:grid}.parking-cell{aspect-ratio:1.4;border:1px dashed #81a491;border-radius:5px;min-width:0}.math-number-road{justify-content:center;align-items:center;height:min(22dvh,190px);display:flex}.math-number-road .vehicle-picture{width:120px}.math-number-road strong{font-size:clamp(26px,4vw,46px)}.math-range{justify-content:center;align-items:center;gap:12px;display:flex}.math-range button{padding:6px 18px;font-size:25px}.math-pages{justify-content:center;align-items:center;gap:12px;display:flex}.math-pages button{min-height:40px;font-size:20px}.unit-navigator .route-heading:has(+.math-range){display:none}.math-unit-grid{grid-template-rows:repeat(2,minmax(0,1fr))}.activity-card:has(.math-scene){gap:8px}.activity-card:has(.math-scene)>h1{margin:3px;font-size:clamp(24px,4vw,38px)}.activity-card:has(.math-scene) .answer-grid button{min-height:70px}.activity-card:has(.math-scene) .answer-grid span{font-size:38px}@media (max-width:650px){.vehicle-types{grid-template-columns:repeat(4,1fr)}.vehicle-workshop{gap:8px;padding:10px}.vehicle-colors{flex-wrap:wrap;justify-content:center}.vehicle-colors button{width:12%;height:40px;min-height:40px}.vehicle-adjust{flex-wrap:wrap}.vehicle-adjust button{font-size:21px}.parking-groups{flex-direction:column;max-width:370px;margin:auto}.parking-cell{aspect-ratio:2}.unit-navigator:has(.math-range){gap:6px}.math-range button{padding:4px 12px;font-size:22px}}@media (max-height:680px){.vehicle-workshop{grid-template-rows:44px minmax(45px,1fr) auto auto auto;gap:5px;padding:8px}.vehicle-types button{min-height:42px;font-size:28px}.vehicle-colors button{height:36px;min-height:36px}.math-scene .parking-cell{aspect-ratio:2}.math-frame-controls button{min-height:34px}.activity-card:has(.math-scene) .answer-grid button{min-height:52px}}@media (orientation:portrait) and (min-width:651px){.parking-groups{flex-direction:column;width:min(580px,100%);margin:auto}.parking-cell{aspect-ratio:1.8}.math-scene{width:min(680px,100%)}}.math-scene.interactive{flex-direction:column;flex:1;justify-content:center;gap:8px;width:100%;min-height:0;margin:0;display:flex}.interactive .parking-groups{gap:6px;width:100%;max-width:none}.interactive .ten-parking{grid-template-rows:none;grid-template-columns:repeat(5,minmax(0,1fr));align-content:center;min-width:0}.interactive .parking-cell{aspect-ratio:auto;cursor:pointer;opacity:1;background:#f1fbf5;border:2px dashed #8ca89c;border-radius:12px;height:clamp(56px,8dvh,90px);min-height:56px;padding:0;transition:background 80ms,transform 80ms;position:relative}.interactive .parking-cell:active,.interactive .parking-cell.counted{background:#ffe196;border:3px solid #dd9a1a;transform:scale(.96)}.interactive .parking-cell b{background:#fff4ca;border-radius:50%;min-width:22px;font-size:18px;position:absolute;top:1px;right:3px}.waiting-parking>div{grid-template-columns:repeat(10,minmax(0,1fr));gap:3px;display:grid}.waiting-parking>span{font-size:20px;display:block}.waiting-parking .waiting-car{background:#e9f5ff;border-color:#81a9cb}.empty-parking{background:#e5f3e9;border-radius:12px;flex:1;min-height:56px;font-size:42px}.math-frame-controls{align-items:center;min-height:56px;margin:0}.math-frame-controls button,.math-pages button,.math-range button,.workshop-open,.vehicle-workshop button{min-width:56px;min-height:56px}.math-frame-controls>span{font-size:25px}.math-frame-controls .next-math-stage{background:#a6edb9;animation:1.6s infinite car-breathe}.math-number-road button{background:#fff;border:2px solid #b3d7c4;border-radius:12px;min-width:56px;min-height:56px;font-size:clamp(24px,4vw,40px)}.math-number-road .missing-number{background:#ffdc73;outline:3px solid #e7b125}.math-number-road button[aria-pressed=true]{box-shadow:0 0 0 4px #77cfa3}.activity-card:has(.interactive){justify-content:flex-start}.activity-card:has(.interactive) .answer-grid{margin-top:3px}.activity-card:has(.interactive) .question-help{margin:2px 0}@media (orientation:portrait){.interactive .parking-groups{flex-direction:column}.waiting-parking>div{grid-template-columns:repeat(5,minmax(0,1fr))}.interactive .parking-cell{height:clamp(56px,7dvh,86px)}}.model-parent-details{text-align:right;font-size:14px;position:relative}.model-parent-details summary{cursor:pointer;align-items:center;min-height:32px;display:inline-flex}.model-parent-details[open]{z-index:100;background:#fff;border:3px solid #88bba6;border-radius:18px;max-width:min(480px,90vw);max-height:75dvh;padding:16px;position:fixed;top:84px;right:18px;overflow:auto;box-shadow:0 8px 40px #203a4355}.model-parent-details .model-loading-stages{text-align:left}.model-loading.compact{padding:8px 14px}.model-loading:has(.sound-fault){position:relative}.sound-fault{color:#8f3615;z-index:20;font-size:14px;position:relative}.sound-fault summary{cursor:pointer;justify-content:center;align-items:center;min-height:48px;display:flex}.sound-fault p{z-index:50;background:#fff5dd;border:2px solid #dfa849;border-radius:14px;width:min(320px,70vw);padding:12px;line-height:1.5;position:absolute;top:100%;right:0;box-shadow:0 8px 24px #47310d33}.teacher-stage .sound-fault p{left:0;right:auto}.sound-fault[open]{z-index:101}.scene-color{border:2px solid #fff;border-radius:50%;width:22px;height:22px;position:absolute;bottom:12px;left:12px}.scene-黄色{background:#edbf35}.scene-蓝色{background:#408edf}.scene-绿色{background:#45a767}.scene-紫色{background:#9861c9}.scene-橙色{background:#e78b30}.scene-粉色{background:#e977a7}.scene-红色{background:#d8524c}.unit-icon{white-space:nowrap}.unit-card.nav-candidate,.course-card.nav-candidate{outline:5px solid #e8a62b;box-shadow:0 0 0 10px #ffd66b88}.unit-card.recommended .unit-icon{animation:none!important}.answer-grid .choice-speaker{width:48px;min-width:48px;height:48px;min-height:48px}.round-control,.question-help button,.kid-voice-dock>button,.unit-back,.duplex-toolbar button,.chat-keyboard-toggle{min-width:56px!important;min-height:56px!important}.vehicle-colors button{width:56px;min-width:56px;height:56px;min-height:56px}.vehicle-colors{flex-wrap:wrap;justify-content:center}.voice-only-cue i{animation-play-state:paused}.is-speaking~.teacher-bubble .voice-only-cue i{animation-play-state:running}.parent-button,.microphone-button{min-width:56px!important;min-height:56px!important}.microphone-button{min-width:190px!important}@media (max-width:600px) and (orientation:portrait){.home-shell,.lesson-shell,.child-start-shell{width:100%;height:100dvh;min-height:0;padding:max(6px,env(safe-area-inset-top)) max(8px,env(safe-area-inset-right)) max(8px,env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));overflow:hidden}.home-shell{flex-direction:column;gap:6px;display:flex}.home-shell .topbar{flex-shrink:0;gap:6px;min-height:56px}.home-shell .brand-mark,.home-shell .topbar h1{display:none}.home-shell .topbar-actions{justify-content:space-between;width:100%}.home-shell .welcome-card{border-radius:22px;flex-shrink:0;min-height:62px;margin:0;padding:6px 14px}.home-shell .welcome-card h2{margin:0;font-size:24px}.home-shell .speech-label{display:none}.home-shell .photo-avatar.small{width:50px;height:50px}.home-shell .kid-voice-dock{flex-shrink:0;width:100%;min-height:60px;margin:0;padding:2px 12px}.home-shell .model-loading{flex-wrap:wrap;flex-shrink:0;justify-content:space-between;align-items:center;gap:2px;min-height:36px;margin:0;padding:4px 8px;display:flex}.model-loading-heading{font-size:12px}.model-loading-track{width:100%}.home-shell .model-parent-details summary{min-height:36px}.home-shell .course-grid{flex:1;grid-template-rows:repeat(2,minmax(0,1fr));grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;width:100%;min-height:0;margin:0;display:grid}.home-shell .course-grid.with-stories{grid-template-rows:repeat(3,minmax(0,1fr));gap:6px}.home-shell .story-home-card{flex-direction:row;grid-column:1/-1}.home-shell .with-stories .course-icon{width:56px;height:42px;font-size:32px}.home-shell .story-home-card small{font-size:12px;display:block}.home-shell .course-card{border-radius:24px;flex-direction:column;justify-content:center;align-items:center;gap:5px;min-height:0;padding:8px}.home-shell .course-icon{width:72px;height:64px;font-size:42px}.home-shell .course-copy{align-items:center;margin:0}.home-shell .course-copy strong{font-size:18px}.home-shell .go-bubble,.home-shell .home-footer{display:none}.home-shell .home-message.voice-status-icon{pointer-events:none;width:32px;margin:0;padding:0;font-size:16px;position:absolute;bottom:8px;left:50%}.home-shell .unit-navigator{flex:1;grid-template-rows:56px minmax(0,1fr);grid-template-columns:56px minmax(0,1fr);gap:6px;width:100%;min-height:0;margin:0;display:grid}.home-shell .unit-navigator:has(.math-range){grid-template-rows:56px 56px minmax(0,1fr)}.home-shell .unit-back{grid-area:1/1;padding:0}.home-shell .route-heading{grid-area:1/2;height:56px;margin:0}.home-shell .math-range{grid-area:1/2;gap:6px}.home-shell .math-range button{flex:1;padding:4px;font-size:17px}.home-shell .math-pages{grid-area:2/1/auto/-1}.home-shell .unit-grid{grid-column:1/-1;grid-template-rows:repeat(2,minmax(0,1fr));grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;min-height:0;margin:0}.home-shell .unit-card{flex-direction:column;justify-content:center;align-items:center;gap:3px;min-height:0;padding:6px;display:flex}.home-shell .unit-card strong{font-size:15px}.home-shell .unit-card .unit-icon{font-size:38px}.home-shell .unit-card .unit-number{width:24px;height:24px;font-size:13px;position:absolute;top:5px;left:5px}.home-shell .unit-card>b{font-size:16px;position:absolute;bottom:6px;right:6px}.lesson-shell{grid-template-rows:56px 6px 56px minmax(0,1fr);grid-template-columns:minmax(0,1fr);gap:5px}.lesson-header{grid-area:1/1;gap:5px}.lesson-title{gap:3px;min-width:0}.lesson-title small{white-space:nowrap;text-overflow:ellipsis;max-width:110px;font-size:11px;overflow:hidden}.lesson-title>span{display:none}.lesson-title strong{font-size:18px}.lesson-header-actions{gap:4px}.lesson-shell>.progress-track{grid-area:2/1;margin:0}.lesson-shell>.duplex-toolbar{flex-direction:row;grid-area:3/1;justify-content:flex-end;gap:4px;margin:0;padding-left:58px}.duplex-toolbar small{display:none}.lesson-shell>.teacher-stage{z-index:1;grid-area:3/1;align-self:center;width:56px;min-height:0;margin:0;display:block}.teacher-stage .photo-avatar.large{border-width:3px;width:52px;height:52px;font-size:20px}.teacher-stage .teacher-bubble{display:none}.teacher-stage .sound-fault{background:#fff;position:absolute;top:0;left:0}.lesson-shell>.activity-card,.lesson-shell>.completion-card{border-radius:22px;grid-area:4/1;gap:6px;min-height:0;padding:8px;position:relative}.activity-card>h1{margin:2px;font-size:24px}.activity-visual{min-height:56px;font-size:42px}.activity-card .answer-grid{flex-shrink:0;gap:6px;width:100%}:is(.activity-card .answer-grid button,.activity-card:has(.math-scene) .answer-grid button){min-height:56px;padding:4px}.activity-card .question-help{flex-shrink:0;justify-content:flex-start;gap:8px;width:100%;min-height:56px;margin:0;padding-right:132px}.activity-card>.microphone-button{width:124px;min-height:56px;margin:0;padding:4px;font-size:15px;position:absolute;bottom:8px;right:8px;min-width:124px!important}.activity-card>.lesson-status{pointer-events:none;min-height:0;margin:0;padding:0;font-size:18px;position:absolute;top:4px;right:8px}.activity-card:has(.interactive)>h1{display:none}.math-scene.interactive{grid-template-columns:repeat(5,minmax(0,1fr));align-content:center;gap:4px;display:grid}.interactive .math-frame-controls,.interactive .empty-parking{grid-column:1/-1}.interactive .parking-groups,.interactive .ten-parking,.interactive .waiting-parking,.interactive .waiting-parking>div{display:contents}.interactive .waiting-parking>span{display:none}.interactive .parking-cell{height:56px;min-height:56px}.math-frame-controls{gap:6px;min-height:56px}.lesson-english .activity-card .english-options .choice-wrap{flex-direction:column;gap:4px;display:flex}.lesson-english .activity-card .english-options .choice-main{flex:1;min-height:96px;padding:4px}.lesson-english .activity-card .english-options .choice-speaker{align-self:center;width:56px;height:56px;min-height:56px;padding:0;position:static}.lesson-english .activity-card .english-options .choice-main span{font-size:26px}.lesson-english .activity-card .english-options .choice-main b{font-size:14px}.choice-main span{font-size:32px}.choice-main b{font-size:14px}.chat-card{padding-bottom:72px!important}.chat-card .chat-starters{flex:1;grid-template-rows:repeat(2,minmax(0,1fr));grid-template-columns:repeat(2,minmax(0,1fr));min-height:0;margin:0}.chat-starters button{min-height:56px}.chat-card .chat-keyboard-toggle{position:absolute;bottom:8px;left:8px}.chat-card .chat-history{flex:1;min-height:0}.chat-input{width:100%}.chat-input input{min-width:0;font-size:16px}.workshop-backdrop{padding:6px}.vehicle-workshop{width:100%;height:calc(100dvh - 12px - env(safe-area-inset-top) - env(safe-area-inset-bottom));border-width:3px;grid-template-rows:56px minmax(44px,1fr) auto auto auto;gap:6px;padding:8px}.vehicle-types{gap:5px}.vehicle-types button{font-size:28px}.vehicle-colors{grid-template-columns:repeat(5,minmax(0,1fr));gap:4px;display:grid}.vehicle-colors button{width:100%;min-width:0;height:56px}.vehicle-adjust{grid-template-columns:repeat(3,minmax(0,1fr));gap:4px;display:grid}.vehicle-adjust b{text-align:center}.parent-shell{padding:12px 8px 30px}.parent-shell>header{gap:8px;margin:0}.settings-card{padding:16px}.settings-card input,.settings-card select{max-width:100%}.teacher-editor-grid article{padding:12px}.child-start-card{max-height:100%;padding:12px}.child-start-card .photo-avatar.large{width:72px;height:72px}.child-start-card .start-road{margin:8px}.child-start-card h1{font-size:23px}}