:root{--navy:#081d2a;--teal:#0a5962;--orange:#f47a2a;--text:#183b45;--muted:#536f76;--line:#dbe5e6;--soft:#f1f6f5;--white:#fff;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--navy);font-size:16px;font-synthesis:none}
*{box-sizing:border-box}body{margin:0;background:#fff;height:100vh;height:100dvh;display:flex;flex-direction:column;overflow:hidden}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{color:inherit;background:#fff;border:1px solid var(--line);border-radius:8px;min-height:44px;padding:9px 13px;cursor:pointer}button:hover:not(:disabled){border-color:var(--teal);background:#edf5f4}button:disabled,select:disabled{cursor:not-allowed;opacity:.45}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--orange);outline-offset:3px}a:hover{color:var(--teal)}[hidden]{display:none!important}.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}.skip-link{position:fixed;left:16px;top:-100px;background:var(--navy);color:#fff;padding:12px;z-index:100}.skip-link:focus{top:10px}
.site-header{height:68px;flex-shrink:0;padding:0 30px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);gap:24px}.brand{display:flex;align-items:center;min-height:44px}.brand-logo{display:block;width:125px;height:auto}.site-header nav{display:flex;gap:25px;align-items:center}.site-header nav a{font-size:14px;min-height:44px;display:flex;align-items:center;gap:7px}
@media(max-width:760px){.brand-logo{width:108px}}
#showroom{display:flex;flex-direction:column;flex:1;min-height:0;background:#fff}.exhibit-heading{padding:19px 30px 15px;display:flex;align-items:center;justify-content:space-between;gap:20px}.eyebrow{margin:0 0 7px;color:var(--teal);font-size:13px;display:flex;align-items:center;gap:7px}.eyebrow i{width:6px;height:6px;background:var(--orange);border-radius:50%}h1{font-size:24px;line-height:1.35;letter-spacing:-.4px;margin:0;font-weight:650}h1 span{font-weight:450;font-size:21px}.consult-link{font-size:15px;padding:12px 18px;min-height:44px;background:var(--navy);color:#fff;border-radius:8px;display:flex;align-items:center;gap:22px}.consult-link:hover{color:#fff;background:var(--teal)}.presets{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));width:min(790px,calc(100% - 60px));gap:4px;margin:0 30px 17px;background:var(--soft);padding:4px;border-radius:10px}.presets button{border:0;background:transparent;display:flex;gap:11px;align-items:center;justify-content:center;min-height:43px;border-radius:7px;font-size:16px;font-weight:550}.presets button span{font-size:13px;font-weight:400;color:var(--muted)}.presets button[aria-pressed=true]{background:var(--teal);color:#fff;box-shadow:0 2px 5px #083c4312}.presets button[aria-pressed=true] span{color:#cee2e1}
.workspace{display:grid;grid-template-columns:302px minmax(0,1fr);flex:1;min-height:0;border-top:1px solid var(--line)}.controls-panel{border-right:1px solid var(--line);min-height:0;background:#fff;position:relative;z-index:4;display:flex;flex-direction:column}.panel-content{overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:#a9c1c4 transparent;flex:1;padding-bottom:20px}.panel-section{padding:22px 23px;border-bottom:1px solid var(--line)}.panel-section h2{font-size:16px;font-weight:650;margin:0 0 14px}.panel-section p{font-size:15px;line-height:1.75;color:var(--muted);margin:10px 0}.panel-section .section-label,.section-label{font-size:13px;color:var(--teal);margin:0 0 9px;line-height:1.5}.introduction{background:linear-gradient(120deg,#f1f7f5,#fff)}.introduction h2{font-size:20px;line-height:1.5;margin-bottom:6px}.introduction p:last-child{margin:0}.field-label{display:block;font-size:14px;color:var(--muted);margin:10px 0 8px}select{width:100%;min-height:45px;background:#fff;color:var(--navy);border:1px solid #c6d7d9;border-radius:7px;padding:9px 10px;font-size:15px}.control-pair{display:flex;gap:8px;margin:10px 0}.control-pair button{flex:1;font-size:14px;padding:9px 6px}.control-pair button[aria-pressed=true]{background:#e5f0ed;border-color:var(--teal);color:var(--teal)}.switch{display:flex;align-items:center;justify-content:space-between;gap:9px;position:relative;cursor:pointer;min-height:44px;font-size:15px}.switch>span{display:flex;align-items:center;gap:8px;line-height:1.4}.switch input{position:absolute;right:0;opacity:0;width:40px;height:25px;margin:0;cursor:pointer}.switch>i{display:block;flex-shrink:0;width:33px;height:20px;background:#d4dfe0;border-radius:20px;pointer-events:none;position:relative}.switch>i:after{content:"";display:block;position:absolute;width:14px;height:14px;background:#fff;border-radius:50%;left:3px;top:3px;box-shadow:0 1px 3px #17364230;transition:transform .15s}.switch input:checked+i{background:var(--teal)}.switch input:checked+i:after{transform:translateX(13px)}.switch input:disabled+i{opacity:.35}.switch input:focus-visible+i{outline:3px solid var(--orange);outline-offset:4px}.play-button{margin-top:13px;display:flex;align-items:center;justify-content:center;gap:10px;color:var(--teal);background:#eaf3f1;border-color:#d7e6e4;width:100%;font-size:15px}.play-button[aria-pressed=true]{background:var(--teal);color:#fff}.panel-section p.small-note{font-size:13px;line-height:1.65;margin:5px 0 10px}.source-section{padding-top:7px;padding-bottom:7px}details+details{border-top:1px solid var(--line)}summary{cursor:pointer;font-weight:600;font-size:15px;padding:17px 0;line-height:1.5}details p{font-size:14px!important}details ul{padding-left:18px;color:var(--muted);font-size:14px;line-height:1.8}details li{margin:12px 0}.panel-consult{display:flex;align-items:center;justify-content:space-between;margin:19px 23px 0;font-size:14px;line-height:1.6;color:var(--teal)}.panel-toggle{display:none}#selection{margin-top:16px}#selection h3{font-size:16px;margin:0 0 8px;color:var(--navy)}#selection dl{font-size:14px;line-height:1.65;margin:0}#selection dt{color:var(--muted);margin-top:10px}#selection dd{margin:2px 0 0;color:var(--navy)}#selection .selection-note{background:var(--soft);border-left:2px solid var(--orange);padding:10px;font-size:14px;margin-top:13px}
.stage{position:relative;min-width:0;min-height:0;display:flex;flex-direction:column;background:radial-gradient(ellipse at 50% 40%,#fff 0%,#edf3f2 63%,#e4ecea 100%);overflow:hidden}.stage-toolbar{padding:15px 20px 0;display:flex;align-items:center;justify-content:space-between;gap:12px;position:absolute;top:0;left:0;right:0;z-index:3;pointer-events:none}.stage-toolbar>*{pointer-events:auto}.view-switch{display:flex;padding:3px;background:#ffffffeb;border:1px solid #d8e3e2;box-shadow:0 3px 12px #123d4605;border-radius:9px}.view-switch button{min-height:39px;padding:8px 14px;border:0;background:transparent;border-radius:6px;font-size:14px}.view-switch button[aria-pressed=true]{background:var(--navy);color:#fff}.fullscreen-button{background:#ffffffdf;font-size:14px;display:flex;gap:10px;align-items:center}.fullscreen-button span{font-size:20px;line-height:1}.stage-body{position:relative;flex:1;min-height:0;isolation:isolate}.view-heading{position:absolute;top:78px;left:24px;z-index:2;display:flex;gap:7px;align-items:center;font-size:13px;color:#426168;pointer-events:none}.view-dot{width:6px;height:6px;border-radius:50%;background:var(--teal)}#scene{position:absolute;inset:0}#scene canvas{display:block;width:100%;height:100%;touch-action:none;outline-offset:-4px}#plan-view{position:absolute;inset:68px 0 0;overflow:hidden;touch-action:none;cursor:grab}#plan-view:active{cursor:grabbing}#plan-image{width:100%;height:100%;object-fit:contain;transform-origin:center;user-select:none;pointer-events:none;padding:48px 35px 65px}.plan-caption{position:absolute;bottom:13px;left:20px;right:65px;text-align:center;font-size:13px;color:var(--muted);background:#f8fbfae6;padding:8px 12px;margin:0;border-radius:5px;pointer-events:none}.plan-error{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:25px;background:#f1f6f5;z-index:2;text-align:center}.plan-error h2{font-size:20px}.plan-error p{font-size:15px;line-height:1.7}.preview{position:absolute;inset:0;overflow:hidden;background:#0d1726;z-index:0}.preview img{width:100%;height:100%;object-fit:contain;opacity:.8}.preview-label{position:absolute;bottom:24px;left:20px;color:#fff;font-size:13px;background:#081d2ac4;padding:7px 10px;border-radius:4px}.load-state{position:absolute;z-index:2;top:50%;left:50%;transform:translate(-50%,-50%);width:min(380px,calc(100% - 40px));padding:25px;background:#ffffffed;border:1px solid #fff;border-radius:14px;box-shadow:0 15px 50px #081d2a1a;backdrop-filter:blur(14px)}.load-state h2{font-size:22px;margin:7px 0 12px;line-height:1.45}.load-state>p:not(.section-label){color:var(--muted);font-size:15px;line-height:1.7;margin:0}.load-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.load-actions button{font-size:14px;color:var(--teal);background:#eaf3f1;border-color:#d3e4e1}.load-actions #retry{background:var(--teal);color:#fff}.loader{display:block;width:25px;height:25px;border:2px solid #d3e4e1;border-top-color:var(--teal);border-radius:50%;margin-bottom:14px;animation:spin 1s linear infinite}.load-state.is-error .loader{display:none}.load-state.is-error .section-label{color:#a14716}.camera-tools{position:absolute;right:20px;bottom:20px;z-index:3;display:flex;flex-direction:column;gap:8px}.camera-tools button{background:#fffffff0;min-height:43px;min-width:43px;font-size:23px;padding:5px;box-shadow:0 2px 8px #17364204}.motion-tools{display:flex;flex-direction:column;gap:3px;margin-bottom:6px}.motion-tools button{font-size:13px;padding:8px}.motion-tools button[aria-pressed=true]{background:var(--teal);color:#fff;border-color:var(--teal)}.stage-bottom{padding:12px 24px 13px;position:relative;background:#f7faf8bb;z-index:1;border-top:1px solid #dce7e466}.legend{display:flex;align-items:center;flex-wrap:wrap;gap:9px 17px;font-size:13px;color:#31535b}.legend span{display:inline-flex;align-items:center;gap:6px}.swatch{display:inline-block;width:9px;height:9px;flex-shrink:0;border-radius:2px}.swatch.equipment{background:#7997a4}.swatch.refrigerant,.swatch.liquid{background:#bd803e}.swatch.gas{background:#9875bd}.swatch.condensate{background:#34836d}.legend-assumed{color:var(--muted);border-left:1px solid #bcd0cf;padding-left:14px}.stage-bottom p{font-size:13px;color:var(--muted);margin:8px 0 0;line-height:1.5}.exhibit-footer{display:flex;justify-content:space-between;align-items:center;gap:15px;padding:12px 25px;border-top:1px solid var(--line);font-size:13px;color:#526970;flex-shrink:0}.exhibit-footer p{margin:0;line-height:1.5}.exhibit-footer p>span{color:var(--teal);font-size:15px;margin-right:5px}#scene-status{flex-shrink:0;color:var(--teal)}.noscript-message{position:fixed;bottom:0;left:0;right:0;z-index:100;background:#fff4e9;border-top:2px solid var(--orange);padding:20px;font-size:16px;line-height:1.7}.noscript-message a{text-decoration:underline}.is-plan .view-heading{top:78px}.is-plan .motion-tools{display:none}#showroom:fullscreen{height:100vh;height:100dvh;width:100%;overflow:hidden;background:#fff}
@keyframes spin{to{transform:rotate(360deg)}}
.immersive-body{overflow:hidden!important}#showroom.is-immersive{position:fixed;inset:0;z-index:90;height:100vh;height:100dvh;min-height:0;overflow:hidden;background:#fff}
.floor-labels{position:absolute;inset:0;pointer-events:none;overflow:hidden}.floor-marker{position:absolute;transform:translate(-50%,-50%);font-size:13px;line-height:1.4;white-space:nowrap;padding:4px 9px;color:#315b66;background:#ffffffeb;border-left:2px solid #69939c;border-radius:2px;box-shadow:0 1px 4px #0a3c4410}.swatch.architecture{background:#b3c7cc}.swatch.air{background:#258caa}.swatch.return-air{background:#d28348}
.preview{background:#e8efed}.preview img{opacity:1}
.touch-hint{display:none}
.advanced-settings .presets{grid-template-columns:repeat(2,minmax(0,1fr));width:100%;margin:0 0 15px}
.advanced-settings .presets button{font-size:14px}
.camera-tools .play-button{width:auto;min-height:44px;margin:0 0 7px;padding:8px 10px;font-size:14px;gap:7px}
@media(max-width:760px){.floor-labels{display:none}.touch-hint{display:block}}
@media(max-width:760px) and (max-height:640px){#showroom:fullscreen .exhibit-heading,#showroom.is-immersive .exhibit-heading{display:none}#showroom:fullscreen .presets,#showroom.is-immersive .presets{margin-top:8px;margin-bottom:8px}#showroom:fullscreen .workspace,#showroom.is-immersive .workspace,#showroom:fullscreen .stage-body,#showroom.is-immersive .stage-body{min-height:0}}
@media(min-width:1600px){.workspace{grid-template-columns:335px minmax(0,1fr)}.panel-section{padding-left:28px;padding-right:28px}.exhibit-heading{padding-top:22px;padding-bottom:20px}h1{font-size:28px}h1 span{font-size:23px}}
@media(max-width:1000px){.site-header{padding:0 20px}.exhibit-heading{padding-left:20px;padding-right:20px}.presets{margin-left:20px;width:calc(100% - 40px)}.workspace{grid-template-columns:270px minmax(0,1fr)}.panel-section{padding:18px}.panel-consult{margin:16px 18px 0}.stage-toolbar{padding-left:14px;padding-right:14px}.view-heading{left:18px}.exhibit-footer{padding:10px 18px}.exhibit-footer #scene-status{display:none}.stage-bottom{padding:10px 18px}}
@media(max-width:760px){body{height:auto;min-height:100vh;min-height:100dvh;overflow:auto}.site-header{height:auto;min-height:62px;gap:8px;padding:9px 16px}.brand{gap:8px}.brand strong{font-size:20px;letter-spacing:1px}.brand strong span{display:none}.brand-mark{width:22px;height:25px;border-width:7px}.site-header nav{gap:14px}.site-header nav a{font-size:13px}.site-header nav a:first-child{display:none}#showroom{min-height:calc(100dvh - 62px);flex:none}.exhibit-heading{padding:16px 17px 12px;gap:8px}.eyebrow{font-size:13px;margin-bottom:7px}h1{font-size:21px}h1 span{font-size:16px;letter-spacing:-.5px}.consult-link{display:none}.presets{width:calc(100% - 28px);margin:0 14px 13px;gap:1px;padding:3px}.presets button{gap:0;min-height:42px;font-size:14px;padding:8px 3px}.presets button span{display:none}.workspace{display:block;position:relative;min-height:420px;flex:1}.stage{position:absolute;inset:0 0 55px}.stage-body{min-height:270px}.stage-toolbar{padding:12px 13px 0}.view-switch button{font-size:13px;padding:8px 11px;min-height:37px}.fullscreen-button{min-height:42px;padding:8px 10px;font-size:13px}.view-heading,.is-plan .view-heading{top:68px;left:17px;font-size:13px}.camera-tools{right:12px;bottom:15px;gap:5px}.camera-tools button{min-width:44px;min-height:44px}.motion-tools{display:none}.stage-bottom{padding:10px 14px}.legend{gap:6px 13px;font-size:13px}.legend-assumed{border:0;padding:0}.stage-bottom p{display:none}.controls-panel{position:absolute;left:0;right:0;bottom:0;border-right:0;border-top:1px solid #cbdcdb;border-radius:15px 15px 0 0;max-height:calc(100% - 80px);box-shadow:0 -4px 22px #0e465812;overflow:hidden}.panel-toggle{display:flex;align-items:center;gap:10px;justify-content:space-between;width:100%;font-size:15px;border:0;background:#fff;border-radius:0;min-height:54px;padding:12px 18px;flex-shrink:0;font-weight:600}.panel-toggle-text{margin-left:auto;font-size:13px;font-weight:400;color:var(--teal)}.panel-toggle>span:last-child{font-size:20px}.panel-content{display:none;padding-bottom:18px;min-height:0}.controls-panel.is-open .panel-content{display:block}.controls-panel.is-open .panel-toggle{border-bottom:1px solid var(--line)}.controls-panel.is-open .panel-toggle>span:last-child{transform:rotate(180deg)}.introduction{padding-top:15px;padding-bottom:15px}.introduction h2{font-size:18px}.panel-section{padding-left:21px;padding-right:21px}.panel-section h2{font-size:16px}.panel-consult{margin-left:21px;margin-right:21px}.exhibit-footer{padding:10px 15px;font-size:13px;line-height:1.5}.exhibit-footer p>span{display:none}.preview-label{left:13px;bottom:13px;font-size:13px}.load-state{padding:19px;width:min(345px,calc(100% - 35px));top:53%}.load-state h2{font-size:20px}.load-state>p:not(.section-label){font-size:14px}.load-state .loader{width:20px;height:20px;margin-bottom:9px}.load-actions{margin-top:13px;gap:8px}.load-actions button{font-size:14px;padding:8px 10px}.plan-caption{bottom:3px;left:11px;right:61px;padding:5px 8px;font-size:13px}#plan-image{padding:36px 19px 49px}#plan-view{top:58px}#showroom:fullscreen{min-height:100dvh}.plan-error h2{font-size:18px}.plan-error p{font-size:14px}}
@media(max-width:380px){h1{font-size:20px}h1 span{font-size:15px}.site-header nav{gap:12px}.legend{gap:5px 10px}.legend-assumed{flex-basis:100%}.stage-bottom{padding-top:8px;padding-bottom:8px}.workspace{min-height:445px}}
@media(max-height:660px) and (min-width:761px){.site-header{height:56px}.exhibit-heading{padding-top:12px;padding-bottom:10px}.eyebrow{display:none}.presets{margin-bottom:10px}.exhibit-footer{padding-top:8px;padding-bottom:8px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}.loader{animation:none;border-color:var(--teal)}}

html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
.panel-consult { min-height: 44px; }

@media (pointer: coarse) {
  select { font-size: 16px; }
}

@media (max-width: 760px) {
  body { height: 100vh; height: 100dvh; min-height: 0; overflow: hidden; }
  #showroom { flex: 1; min-height: 0; }
  .workspace, .stage-body { min-height: 0; }
  select { font-size: 16px; }
  .view-switch button, .fullscreen-button { min-height: 44px; }
}

@media (max-height: 640px) {
  .camera-tools { flex-direction: row; align-items: center; }
  .camera-tools .play-button { margin: 0; }
  .motion-tools { flex-direction: row; margin: 0; }
}

@media (pointer: coarse) and (orientation: landscape) and (max-height: 520px) {
  body { height: 100vh; height: 100dvh; min-height: 0; overflow: hidden; }
  .site-header { height: 54px; min-height: 54px; padding: 4px 16px; }
  #showroom { flex: 1; min-height: 0; }
  .exhibit-heading, .floor-labels { display: none; }
  .workspace { display: block; position: relative; flex: 1; min-height: 0; }
  .stage { position: absolute; inset: 0; }
  .stage-body { min-height: 0; }
  .stage-toolbar { padding: 10px 12px 0; }
  .view-switch button, .fullscreen-button { min-height: 44px; }
  .view-heading, .is-plan .view-heading { top: 68px; left: 16px; }
  .stage-bottom { padding: 6px 12px; }
  .stage-bottom p, .motion-tools { display: none; }
  .legend { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: thin; }
  .legend > span { flex-shrink: 0; white-space: nowrap; }
  .legend-assumed { flex-basis: auto; }
  .camera-tools { right: 12px; bottom: 10px; }
  .controls-panel { position: absolute; left: 12px; right: auto; bottom: 40px; width: 235px; max-height: calc(100% - 16px); border: 1px solid #cbdcdb; border-radius: 9px; box-shadow: 0 4px 22px #0e46581a; overflow: hidden; }
  .controls-panel.is-open { bottom: 8px; width: min(320px, calc(100% - 24px)); }
  .panel-toggle { display: flex; align-items: center; justify-content: space-between; gap: 8px; width: 100%; min-height: 44px; padding: 9px 12px; border: 0; border-radius: 0; font-size: 15px; }
  .panel-toggle-text { margin-left: auto; color: var(--teal); font-size: 13px; }
  .panel-content { display: none; min-height: 0; }
  .controls-panel.is-open .panel-content { display: block; }
  .touch-hint { display: block; }
  select { font-size: 16px; }
  .exhibit-footer { padding: 8px 14px; }
  #scene-status { display: none; }
}