:root{color-scheme:dark}
.research-page{--research-bg:#07090c;--research-surface:#0c1014;--research-raised:#10161b;--research-canvas:#080c10;--research-text:#f4f7f7;--research-body:#c3cbd0;--research-muted:#929da2;--research-subtle:#626d73;--research-accent:#c7fbff;--research-accent-hover:#fff;--research-line:rgba(218,233,238,.15);--research-line-strong:rgba(218,233,238,.34);--research-selected:rgba(125,117,255,.14);--research-selection-border:#7d75ff;--bg:var(--research-bg);--surface:var(--research-surface);--surface-2:var(--research-raised);--text:var(--research-text);--muted:var(--research-muted);--line:var(--research-line);--line-strong:var(--research-line-strong);--red:#7d75ff;--cyan:var(--research-accent);background:var(--research-bg);color:var(--research-text)}
.research-page ::selection{background:#404070;color:#fff}
.research-page .skip-link{background:var(--research-accent);color:#07090c}
.research-page [hidden]{display:none!important}
/* Keep dataset control defaults out of shared navigation and overlays. */
:where(.research-main) :where(button,select){font:inherit}
.research-main :is(button,a,select):focus-visible{outline:2px solid var(--research-accent);outline-offset:4px}
.research-main{max-width:1536px;padding:var(--header-height) 64px 0;margin:auto}
.research-kicker{font:500 11px/1.7 ui-monospace,SFMono-Regular,Consolas,"Microsoft YaHei",monospace;letter-spacing:.13em;color:var(--research-muted);margin:0 0 24px}
.research-intro{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:end;padding:64px 0 48px}
.intro-title .research-kicker{display:flex;align-items:center;gap:10px;letter-spacing:.09em}
.intro-title .intro-definition{font-size:13px;line-height:1.8;letter-spacing:.025em;color:var(--research-body)}
.research-dot{width:6px;height:6px;flex-shrink:0;border-radius:50%;background:var(--research-accent)}
.research-intro h1{font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;font-size:clamp(36px,4vw,58px);font-weight:540;line-height:1.2;letter-spacing:-.045em;margin:0}
.research-intro h1>span{color:var(--research-text)}
.research-page .heading-en{display:block;font-family:Arial,"Helvetica Neue",sans-serif;font-size:clamp(28px,3vw,42px);font-weight:600;line-height:1.13;letter-spacing:-.035em;color:var(--research-text);text-wrap:balance}
.research-page .heading-zh{display:block;margin-top:14px;font-family:system-ui,"Microsoft YaHei",sans-serif;font-size:clamp(18px,1.7vw,23px);font-weight:400;line-height:1.5;letter-spacing:0;color:var(--research-body)}
.research-page h1 .heading-en{font-size:clamp(38px,4.2vw,62px);letter-spacing:-.045em}
.research-page h1 .heading-zh{margin-top:22px;font-size:clamp(21px,2vw,28px)}
.research-page h1 .heading-zh br{display:none}
.research-page h1 .heading-zh>span::before{content:" · "}
.research-page .scale-heading .heading-en{font-size:20px;white-space:normal}
.research-page .scale-heading .heading-zh{margin-top:5px;font-size:12px}
.intro-copy{max-width:540px}
.intro-copy>p:first-child{font-size:16px;line-height:1.9;color:var(--research-body);margin:0 0 12px}
.intro-copy>p:nth-child(2){font-size:16px;line-height:1.9;color:var(--research-muted);margin:0}
.intro-actions{display:flex;align-items:center;gap:28px;margin-top:30px}
.intro-link{display:inline-flex;align-items:center;gap:18px;font-size:14px;color:var(--research-accent);min-height:44px}
.intro-link span{font-size:18px}
.intro-link--primary{padding:12px 20px;background:var(--research-accent);color:#07090c;border-radius:999px;transition:background .2s,transform .2s}
.intro-link--primary:hover{background:var(--research-accent-hover);color:#07090c;transform:translateY(-1px)}
.intro-link--muted{color:var(--research-muted)}
.layout-study{margin:0;min-width:0}

.study-plans{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;padding:0}
.study-plan{position:relative;display:flex;flex-direction:column;min-width:0;background:var(--research-surface);border:1px solid var(--research-surface);border-radius:4px;padding:14px 12px 10px;color:var(--research-body);transition:transform .25s,background .25s;transform:none}
.study-plan:nth-child(2){background:var(--research-surface);border-color:var(--research-surface);transform:none}
.study-plan:nth-child(3){background:var(--research-surface);border-color:var(--research-surface)}
.study-plan,.study-plan:nth-child(2),.study-plan:nth-child(3){border-color:var(--research-line);border-radius:.85rem}
.study-plan:hover{transform:translateY(-3px);background:var(--research-raised)}
.study-plan:nth-child(2):hover{transform:translateY(-3px)}
.study-label{font:11px/1.5 ui-monospace,"Microsoft YaHei",monospace;letter-spacing:.08em}
.study-plan img{display:block;width:100%;height:auto;object-fit:contain;padding:12px 0}
.study-open{align-self:flex-end;margin-top:10px;font-size:16px;color:var(--research-subtle)}

.dataset-scale{padding:28px 0 38px;border-top:1px solid var(--research-line)}
.scale-heading{display:flex;justify-content:space-between;align-items:center;gap:18px;font-size:12px;color:var(--research-muted);margin-bottom:28px}
.scale-heading h2{font-size:inherit;font-weight:500;line-height:1.7;margin:0;white-space:nowrap}
.growth-label{display:inline-flex;align-items:center;gap:7px;color:var(--research-accent)}
.growth-label i{height:5px;width:5px;flex-shrink:0;border-radius:50%;background:var(--research-accent)}
.scale-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.scale-metrics>div{display:flex;flex-direction:column;gap:12px}
.scale-metrics>div+div{padding-left:28px;border-left:1px solid var(--research-line)}
.scale-metrics strong{font:400 clamp(36px,3.7vw,54px)/1.1 ui-monospace,Consolas,"Microsoft YaHei",monospace;letter-spacing:-.055em;color:var(--research-text);white-space:nowrap}
.scale-metrics strong>span{font-size:22px;margin-left:4px;letter-spacing:0;color:var(--research-muted)}
.scale-metrics>div>span{font-size:13px;color:var(--research-muted)}

.dataset-features{border-top:1px solid var(--research-line);padding:34px 0 40px;scroll-margin-top:110px}
.features-heading{margin-bottom:32px}

.features-heading h2{font-size:clamp(23px,2.4vw,32px);line-height:1.45;font-weight:500;letter-spacing:-.03em;margin:0}
.features-body{display:grid;grid-template-columns:.8fr 1.2fr;gap:64px;align-items:start}
.feature-grid{display:grid;grid-template-columns:1fr;gap:28px;padding-top:0}
.feature-grid article{min-width:0}

.feature-grid h3{font-size:17px;font-weight:500;line-height:1.6;color:var(--research-text);margin:0 0 10px}
.feature-grid p{font-size:14px;line-height:1.9;color:var(--research-muted);margin:0;max-width:30em}
.dataset-section{padding:40px 0 52px;border-top:1px solid var(--research-line);scroll-margin-top:105px}
.dataset-heading{display:flex;justify-content:space-between;align-items:end;gap:22px;padding:0 0 18px}

.dataset-heading h2{font-size:clamp(23px,2.4vw,32px);font-weight:500;letter-spacing:-.03em;line-height:1.45;margin:0}
.collection-meta{font-size:12px;white-space:nowrap;color:var(--research-muted);padding-bottom:5px}
.collection-meta strong{font:400 18px/1.5 ui-monospace,monospace;color:var(--research-text);margin-right:4px}
.sample-access-note{display:flex;justify-content:space-between;align-items:center;gap:20px;margin:0 0 25px;font-size:13px;line-height:1.8;color:var(--research-muted)}
.sample-access-note a{color:var(--research-accent);white-space:nowrap}
.sample-access-note a>span{margin-left:10px}
.explorer{position:relative;border:1px solid var(--research-line);border-radius:1.25rem;overflow:hidden;background:var(--research-canvas);box-shadow:0 2rem 6rem rgba(0,0,0,.22)}
.explorer-toolbar{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding:16px 22px;border-bottom:1px solid var(--research-line);background:var(--research-surface)}
.explorer-actions{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:12px 20px;margin-left:auto}
.sample-control{display:flex;align-items:center;gap:16px;min-width:0}
.sample-control label{font-size:13px;white-space:nowrap;color:var(--research-muted)}
.sample-control select{width:170px;max-width:100%;padding:9px 30px 9px 12px;background:var(--research-canvas);border:1px solid var(--research-line);border-radius:.55rem;color:var(--research-body);color-scheme:dark;font-size:13px;cursor:pointer}
.sample-pager{display:flex;align-items:center;gap:8px}
.sample-pager>span{font:12px/1.5 ui-monospace,monospace;color:var(--research-muted);margin-right:14px;min-width:60px}
.icon-button,.next-button{min-height:38px;border:1px solid var(--research-line);border-radius:999px;background:transparent;color:var(--research-body);cursor:pointer}
.icon-button{width:38px;font-size:18px!important}
.next-button{display:inline-flex;align-items:center;justify-content:center;gap:20px;padding:8px 14px;font-size:13px!important}
.research-main button:hover:not(:disabled){border-color:var(--research-line-strong);color:var(--research-accent-hover)}
.research-main button:disabled{opacity:.4;cursor:wait}
.research-status{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

.plan-panel{display:grid;grid-template-rows:minmax(0,1fr) auto;min-width:0;background:var(--research-canvas);background-image:none}

.view-controls{display:flex;gap:1px;border:1px solid var(--research-line);border-radius:999px;background:var(--research-canvas);overflow:hidden}
.view-controls button{border:0;min-width:32px;min-height:30px;font-size:12px;background:transparent;color:var(--research-body);cursor:pointer}
.view-controls button+button{border-left:1px solid var(--research-line)}
.research-page .view-controls button:hover:not(:disabled){color:var(--research-accent-hover);background:var(--research-selected)}
.plan-viewport{position:relative;min-height:620px;isolation:isolate}
.plan-mount{position:absolute;inset:0}
.dataset-plan{width:100%;height:100%}
.dataset-plan .floorplan-toolbar,.dataset-plan .floorplan-help,.dataset-plan .floorplan-loading,.dataset-plan .floorplan-error{display:none}
.dataset-plan .floorplan-canvas{width:100%;height:100%;position:relative;overflow:hidden;touch-action:pan-y}
.dataset-plan .floorplan-svg{display:block;width:100%;height:100%;min-height:0;user-select:none;cursor:default}
.dataset-plan .floorplan-base-layer{opacity:1}
.dataset-plan .floorplan-furniture-layer{pointer-events:none}
.dataset-plan .floorplan-room-hit{fill:transparent;stroke:none;cursor:pointer;outline:none;transition:fill .16s ease;pointer-events:fill}
.dataset-plan .floorplan-room-hit:hover{fill:#8db4ea0d}
.dataset-plan .floorplan-room-hit[aria-pressed="true"]{fill:#8db4ea1a;stroke:var(--research-selection-border);stroke-width:1;vector-effect:non-scaling-stroke;stroke-dasharray:4 4}
.dataset-plan .floorplan-room-hit:focus-visible{fill:#8db4ea26;stroke:var(--research-selection-border);stroke-width:2;vector-effect:non-scaling-stroke}
.dataset-plan .floorplan-room-label{fill:var(--research-body);font:500 22px/1 system-ui,"Microsoft YaHei",sans-serif;pointer-events:none;paint-order:stroke;stroke:var(--research-canvas);stroke-width:8;stroke-linejoin:round}
.plan-legend{display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;padding:15px 22px;font-size:11px;color:var(--research-muted)}
.plan-legend>span{display:inline-flex;align-items:center;gap:8px;white-space:nowrap}.plan-legend>span:first-child{margin-right:auto}
.plan-legend i{width:9px;height:9px;border:1px dashed var(--research-selection-border);background:#8db4ea1a}
.plan-legend .legend-wall{border:0;background:#627085}.plan-legend .legend-door{border:0;border-bottom:2px solid #d0b287;background:transparent}.plan-legend .legend-window{height:6px;border:0;border-block:1px solid #91c7dc;background:transparent}
.plan-message{position:absolute;inset:0;z-index:4;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;background:var(--research-canvas);color:var(--research-body);padding:24px}
.plan-message p{font-size:14px;line-height:1.8;max-width:34em}
.plan-message strong{color:var(--research-accent-hover);font-size:18px}
.plan-message .next-button{color:var(--research-accent-hover);border-color:var(--research-line-strong)}
.loading-ring{width:28px;height:28px;border:1px solid var(--research-line);border-top-color:var(--research-accent);border-radius:50%;animation:research-spin 1s linear infinite}


.layout-actions{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px 24px;padding:16px 22px;border-top:1px solid var(--research-line);background:var(--research-surface)}
.layout-action-buttons{display:flex;flex-wrap:wrap;gap:10px}
.layout-action-buttons>.download-secondary{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:42px;padding:10px 16px;border:1px solid var(--research-line);border-radius:4px;font-size:13px;cursor:pointer}
.layout-action-buttons>.download-secondary:disabled{cursor:not-allowed;opacity:.42}
.layout-action-buttons>.download-secondary>span{font-size:18px;line-height:1}
.layout-actions .download-note{margin:0;font-size:11px;line-height:1.8;color:var(--research-subtle)}
.download-secondary{background:transparent;color:var(--research-muted)}
.download-secondary small{font-size:10px;color:var(--research-subtle);border-left:1px solid var(--research-line);padding-left:8px}

.download-note a{color:var(--research-accent);text-decoration:underline;text-underline-offset:3px}

.data-principles{display:grid;grid-template-columns:1fr 1fr;gap:12%;padding:64px 0 90px;border-top:1px solid var(--research-line)}
.principles-heading h2{font-size:clamp(27px,2.7vw,38px);line-height:1.5;letter-spacing:-.025em;font-weight:500;margin:0 0 24px}
.principles-heading>p:last-child{font-size:15px;line-height:1.9;color:var(--research-muted);margin:0}
.principles-list article{padding:22px 0;border-top:1px solid var(--research-line)}
.principles-list article:first-child{padding-top:0;border-top:0}
.principles-list article:last-child{padding-bottom:0}

.principles-list h3{font-size:17px;font-weight:500;color:var(--research-text);margin:0 0 9px}
.principles-list p{font-size:14px;line-height:1.95;color:var(--research-muted);margin:0}
.research-partnership{scroll-margin-top:110px;display:grid;grid-template-columns:1.2fr 1fr;gap:12%;padding:56px 48px;background:linear-gradient(145deg,rgba(16,22,27,.96),rgba(8,11,15,.9));border:1px solid var(--research-line);border-radius:1.25rem;margin-bottom:68px}

.research-partnership h2{font-size:clamp(29px,3vw,42px);font-weight:500;line-height:1.45;letter-spacing:-.03em;color:var(--research-text);margin:0 0 24px}
.research-partnership p:not(.research-kicker){font-size:14px;line-height:1.95;color:var(--research-muted);margin:0;max-width:440px}
.research-partnership p.partnership-detail{font-size:11px;color:var(--research-subtle);margin-top:22px}
.partnership-contact{border-left:1px solid var(--research-line);padding-left:40px;align-self:center;display:flex;flex-direction:column;align-items:flex-start}
.partnership-contact>span{font-size:13px;color:var(--research-muted);margin-bottom:20px}
.partnership-contact>span>span{margin-left:20px}
.partnership-email{font:400 clamp(32px,3.6vw,52px)/1.3 ui-monospace,Consolas,monospace;color:var(--research-accent);letter-spacing:-.04em;overflow-wrap:anywhere;max-width:100%}
.partnership-email[href]:hover{text-decoration:underline;text-underline-offset:8px}
.partnership-email[href]{font-size:clamp(16px,2vw,28px);letter-spacing:-.025em}
.partnership-contact small{font-size:11px;color:var(--research-subtle);margin-top:9px}
.research-partnership p.contact-guidance{font-size:12px;color:var(--research-subtle);line-height:1.9;margin-top:30px}
.noscript-note{padding:24px;background:var(--research-surface);color:var(--research-accent)}
@keyframes research-spin{to{transform:rotate(360deg)}}
@media(max-width:1150px){.research-main{padding-inline:36px}.research-intro{gap:38px}.research-intro h1{font-size:46px}.features-body{gap:38px}.study-plan{padding:12px 8px 9px}.study-plans{gap:8px}.scale-metrics{gap:20px}.scale-metrics>div+div{padding-left:20px}.scale-metrics strong{font-size:42px}.research-partnership{gap:7%;padding:42px 36px}}
@media(max-width:900px){.research-intro{grid-template-columns:1fr;gap:24px;padding-top:44px}.features-body{grid-template-columns:1fr;gap:32px}.feature-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;padding-top:0}.intro-title{max-width:620px}.intro-copy{max-width:540px}.research-intro h1{font-size:52px}.layout-study{width:100%}.scale-metrics strong{font-size:36px}.scale-metrics strong>span{font-size:18px}.scale-metrics{gap:16px}.scale-metrics>div+div{padding-left:16px}.data-principles{gap:8%}.research-partnership{gap:5%;padding:36px 28px}.partnership-contact{padding-left:28px}}
@media(max-width:760px){.layout-actions{padding:15px 14px;gap:12px}.layout-action-buttons{width:100%;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;order:-1}.layout-action-buttons>.download-secondary{padding:10px 8px;font-size:12px;gap:7px}.layout-actions .download-note{width:100%;text-align:center;font-size:10px}.research-main{padding:80px 20px 0}.research-intro{padding:32px 0;gap:24px}.research-kicker{font-size:10px;letter-spacing:.09em;margin-bottom:20px}.research-intro h1{font-size:clamp(30px,5.5vw,40px);margin-bottom:0}.intro-copy>p:first-child{font-size:16px}.intro-copy>p:nth-child(2){font-size:14px;line-height:1.95}.intro-actions{margin-top:24px;gap:24px}.intro-link{font-size:13px}.intro-link--primary{padding:11px 16px}.study-plans{gap:7px}.study-plan{padding:10px 6px 6px}.study-label{font-size:10px}.study-open{font-size:14px}.dataset-scale{padding:22px 0 28px}.scale-heading{font-size:11px;margin-bottom:24px}.scale-metrics{grid-template-columns:1fr;gap:0}.scale-metrics strong{font-size:40px}.scale-metrics>div{flex-direction:row;align-items:baseline;justify-content:space-between;gap:18px;padding:16px 0}.scale-metrics>div>span{font-size:12px}.scale-metrics>div+div{border-left:0;border-top:1px solid var(--research-line);padding-left:0}.dataset-features{padding:28px 0 30px}.features-heading{margin-bottom:22px}.feature-grid{grid-template-columns:1fr;gap:22px}.feature-grid h3{font-size:16px;margin-bottom:7px}.feature-grid p{font-size:13px}.dataset-section{padding:30px 0 34px}.dataset-heading{align-items:flex-start;flex-direction:column;gap:12px;padding-bottom:14px}.dataset-heading h2{font-size:23px}.collection-meta{padding:0;font-size:11px}.collection-meta strong{font-size:16px}.sample-access-note{align-items:flex-start;flex-direction:column;gap:6px;font-size:12px;margin-bottom:19px}.explorer-toolbar{padding:12px;gap:8px}.sample-control{gap:8px}.sample-control label{display:none}.sample-control select{width:156px;font-size:12px;padding:9px}.sample-pager{gap:6px}.sample-pager>span{font-size:10px;min-width:44px;margin-right:2px}.next-button{gap:8px;padding:8px 9px;font-size:12px!important}.icon-button{width:32px}.plan-viewport{min-height:460px}.view-controls button{min-width:29px;min-height:30px;font-size:11px}.plan-legend{padding:14px;font-size:10px}.download-secondary small{font-size:9px;padding-left:6px}.data-principles{grid-template-columns:1fr;gap:32px;padding:38px 0 45px}.principles-heading h2{font-size:28px;margin-bottom:18px}.principles-heading>p:last-child{font-size:14px}.principles-list article{padding:19px 0}.principles-list h3{font-size:16px}.principles-list p{font-size:14px}.research-partnership{grid-template-columns:1fr;gap:28px;padding:28px 23px;margin-bottom:40px}.research-partnership h2{font-size:29px;margin-bottom:20px}.research-partnership p:not(.research-kicker){font-size:13px}.research-partnership p.partnership-detail{font-size:10px;margin-top:18px}.partnership-contact{border-left:0;border-top:1px solid var(--research-line);padding:24px 0 0}.partnership-contact>span{margin-bottom:13px;font-size:12px}.partnership-email{font-size:36px}.research-partnership .contact-guidance{font-size:11px;margin-top:19px}}
@media(max-width:480px){.layout-action-buttons{grid-template-columns:1fr}}
@media(max-width:380px){.research-main{padding-inline:15px}.research-intro h1{font-size:30px}.sample-pager>span{display:none}.plan-viewport{min-height:420px}.scale-metrics strong{font-size:35px}.scale-metrics strong>span{font-size:17px}.download-secondary small{display:none}.research-partnership{padding:26px 20px}.research-partnership h2{font-size:24px}}
@media(max-width:760px){.research-main{padding-top:78px}}
@media(max-width:620px){.research-main{padding-top:68px}}
@media(prefers-reduced-motion:reduce){.research-page *{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

.study-dimensions{display:grid;gap:6px;margin:4px 0 0;padding-top:12px;border-top:1px solid var(--research-line);font-size:11px;line-height:1.6;font-variant-numeric:tabular-nums}
.study-dimensions>div{display:flex;align-items:baseline;justify-content:space-between;gap:6px}
.study-dimensions dt{color:var(--research-muted);white-space:nowrap}
.study-dimensions dd{margin:0;color:var(--research-body);white-space:nowrap}
.study-dimensions dd>span{font-size:9px;color:var(--research-subtle)}
@media(max-width:620px){.study-plans{grid-template-columns:1fr;gap:12px}.study-plan{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(110px,1fr);column-gap:16px;padding:14px}.study-label{grid-column:1/-1;font-size:12px}.study-plan img{grid-column:1;grid-row:2;padding:10px 0}.study-dimensions{grid-column:2;grid-row:2;align-self:center;border:0;margin:0;padding:0;gap:9px}.study-dimensions>div{display:block}.study-dimensions dt{font-size:10px}.study-dimensions dd{font-size:12px}.study-open{grid-column:2;justify-self:end;margin-top:0}}