/* Common alignment and spacing, separate vent and engineering presentations. */
:root{--product-width:1280px;--product-gutter:clamp(24px,5.8vw,84px)}
.editorial-systems,
.product-page:is(.vent-overview,.duct-overview,.vent-detail,.duct-detail) main{
  max-width:none;
}
.editorial-systems,
:is(.vent-overview,.duct-overview,.vent-detail,.duct-detail) :is(.collection-hero,.product-section,.product-breadcrumb,.family-nav,.product-bridge){
  padding-inline:max(var(--product-gutter),calc((100% - var(--product-width))/2));
}
:is(.vent-overview,.duct-overview,.vent-detail,.duct-detail) .collection-hero{
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:56px;
  padding-block:56px;
}
:is(.vent-overview,.duct-overview) .collection-hero h1{font-size:clamp(34px,3.5vw,52px);line-height:1.3}
:is(.vent-overview,.duct-overview) .collection-hero>div>p:not(.product-kicker){font-size:18px;line-height:1.85;margin:22px 0 28px}
:is(.vent-overview,.duct-overview) .collection-hero>.product-photo{aspect-ratio:3/2}
:is(.vent-detail,.duct-detail) .detail-hero h1{font-size:48px;line-height:1.3}
:is(.vent-detail,.duct-detail) .detail-hero>div>p.product-lead{font-size:22px;color:var(--ink);line-height:1.6;margin:16px 0 0}
:is(.vent-detail,.duct-detail) .detail-hero>div>p:not(.product-kicker):not(.product-lead){font-size:16px;line-height:1.85;margin:16px 0 26px}
.vent-detail .detail-hero>.product-photo{aspect-ratio:3/2}
.vent-detail .detail-hero>.product-photo.bwpro img{position:absolute;width:315%;max-width:none;height:auto;left:-12.5%;top:-39.5%;object-fit:initial}
.duct-detail .duct-brief{padding:32px}
.duct-detail .duct-brief h2{font-size:24px}
.duct-detail .duct-brief li{font-size:15px;padding-block:12px}
.duct-detail .duct-brief .product-note{font-size:12px;margin-top:20px}
:is(.vent-overview,.duct-overview,.vent-detail,.duct-detail) .family-nav{
  display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:0;
  padding-block:12px;background:#fff;
}
:is(.vent-overview,.duct-overview,.vent-detail,.duct-detail) .family-nav a{
  justify-content:center;text-align:center;padding:8px 10px;font-size:14px;line-height:1.6;
}
:is(.vent-overview,.duct-overview,.vent-detail,.duct-detail) .product-section{padding-block:64px}
:is(.vent-overview,.duct-overview,.vent-detail,.duct-detail) .product-section-heading{margin-bottom:32px}
:is(.vent-overview,.duct-overview,.vent-detail,.duct-detail) .product-section-heading h2{font-size:32px;line-height:1.4}
:is(.vent-overview,.duct-overview) .product-tile-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.product-tile.family-card,.product-tile.duct-card{
  display:block;min-width:0;padding:0;border:1px solid #e5e7e7;background:#fff;
}
.product-tile-link{display:flex;flex-direction:column;height:100%;color:var(--ink);transition:box-shadow .2s}
.product-tile-link:hover{color:var(--ink);box-shadow:0 8px 24px #2a24210c}
.tile-figure{margin:0}
.tile-visual{position:relative;overflow:hidden;aspect-ratio:3/2;background:#f4f5f3}
.tile-visual img{display:block;width:100%;height:100%;object-fit:cover}
.tile-visual.catalog img{object-fit:contain;padding:18px}
.tile-visual.distributor img{padding:0}
/* Window onto the product portion of the original two-page catalogue. */
.tile-visual.bwpro{background:#fff}
.tile-visual.bwpro img{position:absolute;width:315%;max-width:none;height:auto;left:-12.5%;top:-39.5%}
.tile-visual.decorative img{object-position:center top}
.tile-figure figcaption{
  display:flex;align-items:center;min-height:32px;padding:7px 20px;border-bottom:1px solid #e5e7e7;
  font-size:11px;line-height:1.6;color:#696764;background:#fafaf9;
}
.tile-copy{display:flex;flex:1;flex-direction:column;padding:22px 24px 18px;min-width:0}
.tile-kicker{display:flex;align-items:center;gap:10px;font-size:11px;line-height:1.7;color:#66625f;letter-spacing:.015em;min-height:20px}
.tile-kicker>span{font-variant-numeric:tabular-nums;color:#007D9D;border-right:1px solid var(--line);padding-right:10px}
.product-tile h3{font-size:26px;line-height:1.4;margin:10px 0 0}
.tile-description{font-size:14px;line-height:1.8;color:var(--muted);margin:10px 0 20px;min-height:calc(2 * 1.8em)}
.tile-action{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding-top:14px;margin-top:auto;font-size:13px;color:#007D9D;min-height:38px}
.tile-action svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.4}
.product-tile-link:focus-visible{outline-offset:3px}
.product-tile-link:hover .tile-action{color:var(--ink)}
.editorial-systems{padding-block:64px}
.editorial-systems .section-intro h2{font-size:36px}
.editorial-systems .systems-grid{gap:32px}
.editorial-systems .system-column{border:1px solid #e5e7e7;padding:0 28px 24px}
.editorial-systems .system-column+.system-column:before{display:none}
.editorial-systems .system-photo{width:calc(100% + 56px);margin-inline:-28px;aspect-ratio:3/2}
.editorial-systems .system-column h3{font-size:30px;margin-top:24px}
.editorial-systems .system-column>p{font-size:16px}
.editorial-systems .editorial-list{column-gap:24px;margin-top:20px}
.editorial-systems .editorial-list a{font-size:15px;padding-inline:0;min-height:48px}
.editorial-systems .extensions{font-size:14px;line-height:1.7;margin:18px 0 12px;padding-left:12px}
.editorial-systems .extensions small{font-size:12px}
.editorial-systems .system-column>.underlined-link{font-size:14px;padding-top:14px}
@media(max-width:1050px){
  :is(.vent-overview,.duct-overview) .product-tile-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
  :is(.vent-overview,.duct-overview,.vent-detail,.duct-detail) .collection-hero{gap:32px}
  .editorial-systems .system-column{padding-inline:22px}
  .editorial-systems .system-photo{width:calc(100% + 44px);margin-inline:-22px}
  .editorial-systems .system-column h3{font-size:26px}
}
@media(max-width:700px){
  :is(.vent-overview,.duct-overview,.vent-detail,.duct-detail) .collection-hero{grid-template-columns:1fr;gap:28px;padding-block:32px}
  :is(.vent-overview,.duct-overview) .collection-hero h1{font-size:34px}
  :is(.vent-detail,.duct-detail) .detail-hero h1{font-size:34px}
  :is(.vent-detail,.duct-detail) .detail-hero>div>p.product-lead{font-size:19px}
  :is(.vent-overview,.duct-overview) .collection-hero>div>p:not(.product-kicker){font-size:16px;margin:16px 0 22px}
  :is(.vent-overview,.duct-overview,.vent-detail,.duct-detail) .family-nav{grid-template-columns:repeat(3,minmax(0,1fr));padding-block:10px}
  :is(.vent-overview,.duct-overview,.vent-detail,.duct-detail) .family-nav a{font-size:13px;padding-inline:4px}
  :is(.vent-overview,.duct-overview,.vent-detail,.duct-detail) .product-section{padding-block:40px}
  :is(.vent-overview,.duct-overview,.vent-detail,.duct-detail) .product-section-heading h2{font-size:27px}
  :is(.vent-overview,.duct-overview) .product-tile-grid{gap:20px}
  .tile-copy{padding:18px 18px 14px}
  .tile-figure figcaption{padding-inline:18px}
  .product-tile h3{font-size:24px}
  .editorial-systems{padding-block:40px}
  .editorial-systems .section-intro h2{font-size:28px}
  .editorial-systems .system-column h3{font-size:25px}
}
@media(max-width:600px){
  :is(.vent-overview,.duct-overview) .product-tile-grid{grid-template-columns:1fr}
  .editorial-systems .systems-grid{grid-template-columns:1fr;gap:24px}
  .editorial-systems .system-column{padding:0 20px 20px}
  .editorial-systems .system-photo{width:calc(100% + 40px);margin-inline:-20px}
  .editorial-systems .editorial-list{column-gap:18px}
  .editorial-systems .editorial-list a{font-size:14px}
  .tile-description{min-height:0}
}
@media(max-width:360px){
  :is(.vent-overview,.duct-overview) .collection-hero h1{font-size:29px}
  .editorial-systems .section-intro h2{font-size:25px;max-width:none}
  .editorial-systems .system-column h3{font-size:23px}
  .editorial-systems .editorial-list{column-gap:12px}
  .editorial-systems .editorial-list a{font-size:12px}
}
@media(prefers-reduced-motion:reduce){.product-tile-link{transition:none}}

/* A different presentation for engineering selection, not a second vent catalogue. */
.duct-engineering-hero,.duct-function-nav,.duct-function-groups,.duct-coordination,.duct-project-cta{
  padding-inline:max(var(--product-gutter),calc((100% - var(--product-width))/2));
}
.duct-engineering-hero{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:center;padding-block:48px;background:#f0f4f5}
.duct-engineering-hero h1{font-size:48px;line-height:1.35}
.engineering-lead{font-size:22px;line-height:1.65;margin-top:20px}
.engineering-inputs{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.engineering-inputs span{font-size:12px;border:1px solid #c5d4d8;padding:7px 12px;background:#ffffff8c}
.duct-engineering-hero figure{min-width:0}
.duct-engineering-hero img{width:100%;aspect-ratio:1.65;height:auto;object-fit:cover}
.duct-engineering-hero figcaption{font-size:11px;color:var(--muted);margin-top:10px}
.duct-function-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;padding-block:18px;border-bottom:1px solid var(--line)}
.duct-function-nav a{display:flex;gap:16px;align-items:center;min-height:44px;font-size:15px}
.duct-function-nav span{font-size:12px;color:#007D9D}
.duct-function-groups{padding-block:48px 56px}
.duct-function-group{margin-bottom:44px;scroll-margin-top:24px}
.duct-function-group>header{display:flex;align-items:flex-start;gap:20px;margin-bottom:20px}
.duct-function-group>header>span{font-size:16px;color:#007D9D;padding-top:8px}
.duct-function-group h2{font-size:29px;line-height:1.4}
.duct-function-group>header p{font-size:14px;color:var(--muted);margin-top:8px}
.engineering-product{display:grid;grid-template-columns:220px minmax(0,1fr) 220px;gap:32px;align-items:center;padding:22px 0;border-top:1px solid var(--line)}
.engineering-product:last-child{border-bottom:1px solid var(--line)}
.engineering-visual{margin:0;min-width:0}
.engineering-visual img{width:100%;height:145px;object-fit:contain;background:#f4f5f3}
.engineering-visual.photo img{object-fit:cover}
.engineering-visual figcaption{font-size:10px;line-height:1.6;color:var(--muted);margin-top:7px}
.engineering-product h3{font-size:26px;line-height:1.4}
.engineering-product-copy>p{font-size:14px;line-height:1.8;color:var(--muted);margin-top:10px}
.engineering-product .underlined-link{font-size:13px;margin-top:10px}
.engineering-check{border-left:1px solid var(--line);padding-left:24px}
.engineering-check>span{font-size:11px;color:#007D9D;letter-spacing:.1em}
.engineering-check>p{font-size:14px;line-height:1.9;color:var(--muted);margin-top:10px}
.duct-coordination{display:flex;align-items:center;justify-content:space-between;gap:32px;padding-block:40px;background:#f6f7f7}
.duct-coordination h2{font-size:29px;line-height:1.4}
.duct-coordination p:not(.product-kicker){font-size:14px;line-height:1.9;color:var(--muted);max-width:740px;margin-top:14px}
.duct-coordination>a{white-space:nowrap;font-size:14px}
.duct-project-cta{display:flex;align-items:center;justify-content:space-between;gap:36px;padding-block:48px;background:#eaf3f5;border-top:1px solid #d2e3e8}
.duct-project-cta h2{font-size:30px;line-height:1.4}
.duct-project-cta p:not(.product-kicker){font-size:14px;line-height:1.9;color:var(--muted);margin-top:14px}
.duct-project-cta .primary-link{white-space:nowrap;font-size:15px}
.duct-detail .duct-config-sheet{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.duct-detail .duct-config-sheet>div{display:block;background:#fff;border:1px solid #dce2e4;padding:22px}
.duct-detail .duct-config-sheet dt{font-size:13px;color:#007D9D;margin-bottom:12px}
.duct-detail .duct-config-sheet dd{font-size:15px}
.system-scope{display:flex;flex-wrap:wrap;gap:8px 16px;width:100%;margin:24px 0 16px}
.system-scope span{font-size:13px;color:#615d59;background:#f5f5f3;padding:6px 10px}
.company-story{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:56px}
.company-story-hero .company-position{font-size:25px;line-height:1.6;margin-top:20px}
.company-story figure{margin:0;min-width:0}
.company-story img{width:100%;height:380px;object-fit:cover}
.company-story figcaption{font-size:11px;color:var(--muted);margin-top:10px}
.company-story h2{font-size:34px;line-height:1.45}
.company-story div>p:not(.product-kicker){font-size:15px;line-height:1.9;color:var(--muted);margin-top:20px}
.company-story .underlined-link{font-size:14px;margin-top:22px}
.company-record{display:grid;grid-template-columns:1fr 1fr;gap:56px;background:#f4f5f3}
.company-record h2{font-size:38px}
.company-record>div>p:last-child{font-size:15px;color:var(--muted);margin-top:18px}
.company-record dl{margin:0;min-width:0}
.company-record dl>div{display:grid;grid-template-columns:90px 1fr;gap:20px;border-top:1px solid var(--line);padding:20px 0;font-size:15px}
.company-record dt{color:#007D9D}
.company-record dd{margin:0;line-height:1.9}
.company-destinations h2{font-size:30px}
.company-destinations>div{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:28px}
.company-destinations a{display:flex;flex-direction:column;gap:15px;border-top:1px solid var(--line);padding-top:22px}
.company-destinations span{font-size:12px;color:var(--muted)}
.company-destinations strong{font-size:18px;font-weight:500}
.quality-family-head .quality-check-lens{border-left:2px solid var(--blue);padding:22px 26px;background:#f2f6f7;min-width:0}
.quality-check-lens svg{width:28px;height:28px;color:#007D9D;stroke-width:1.5;margin-bottom:12px}
.quality-check-lens>span{display:block;color:#007D9D;font-size:12px}
.quality-check-lens strong{display:block;font-size:20px;font-weight:500;margin:10px 0}
.quality-check-lens p{font-size:12px;color:var(--muted)}
.quality-record-cta{display:flex;align-items:center;justify-content:space-between;gap:36px;background:#eef3f3;border-top:1px solid var(--line)}
.quality-record-cta h2{font-size:30px}
.quality-record-cta p:not(.product-kicker){font-size:14px;color:var(--muted);line-height:1.9;margin-top:15px}
.quality-record-cta .primary-link{font-size:15px;white-space:nowrap}
.space-interface-board{display:grid;grid-template-columns:1fr 1fr;gap:18px;padding:24px;border:1px solid #d9e3e6;background:#f4f8f8;min-width:0}
.space-interface-board>div{padding:20px 16px;border:1px solid #d9e3e6;background:#fff;min-width:0}
.space-interface-board svg{width:26px;height:26px;stroke-width:1.5;color:#007D9D;margin-bottom:16px}
.space-interface-board span{display:block;font-size:12px;color:var(--muted)}
.space-interface-board strong{display:block;font-size:18px;font-weight:500;line-height:1.6;margin:10px 0}
.space-interface-board div>p{font-size:12px;line-height:1.8;color:var(--muted)}
.space-interface-board .interface-note{grid-column:1/-1;font-size:12px;line-height:1.8;color:var(--muted);margin:0}
@media(max-width:1050px){
  .engineering-product{grid-template-columns:180px minmax(0,1fr) 170px;gap:24px}
  .duct-engineering-hero{gap:32px}
  .duct-engineering-hero h1{font-size:38px}
}
@media(max-width:800px){
  .engineering-product{grid-template-columns:160px minmax(0,1fr);gap:20px}
  .engineering-check{grid-column:2;border-left:0;padding:0;display:flex;gap:12px;align-items:baseline}
  .engineering-check>p{margin:0;font-size:12px}
  .engineering-check>span{white-space:nowrap}
  .engineering-visual{grid-row:1/span 2}
  .duct-coordination,.duct-project-cta,.quality-record-cta{flex-direction:column;align-items:flex-start;gap:24px}
  .company-story,.company-record{gap:28px}
}
@media(max-width:700px){
  .duct-engineering-hero{grid-template-columns:1fr;padding-block:32px;gap:28px}
  .duct-engineering-hero h1{font-size:32px}
  .engineering-lead{font-size:20px;margin-top:16px}
  .engineering-inputs{margin-top:22px}
  .duct-function-nav{gap:12px;padding-block:14px}
  .duct-function-nav a{display:block;font-size:12px;line-height:1.6}
  .duct-function-nav span{display:block;margin-bottom:6px}
  .duct-function-groups{padding-block:36px}
  .duct-function-group h2{font-size:26px}
  .engineering-product{grid-template-columns:110px minmax(0,1fr);gap:12px 18px;padding:20px 0}
  .engineering-visual img{height:120px}
  .engineering-product h3{font-size:22px}
  .engineering-product-copy>p{font-size:13px}
  .engineering-product .underlined-link{font-size:12px}
  .engineering-check{display:block}
  .engineering-check>p{margin-top:4px}
  .duct-detail .duct-config-sheet{grid-template-columns:1fr}
  .duct-coordination h2,.duct-project-cta h2{font-size:26px}
  .company-story,.company-record{grid-template-columns:1fr}
  .company-story img{height:280px}
  .company-story h2{font-size:29px}
  .company-destinations>div{grid-template-columns:1fr;gap:24px}
  .quality-record-cta h2{font-size:27px}
  .space-interface-board{padding:16px;gap:12px}
  .space-interface-board>div{padding:16px 12px}
  .space-interface-board strong{font-size:16px}
}
@media(max-width:360px){
  .engineering-product{grid-template-columns:90px minmax(0,1fr);gap:12px}
  .engineering-product h3{font-size:20px}
  .duct-engineering-hero h1{font-size:29px}
  .company-record dl>div{grid-template-columns:70px 1fr;gap:12px;font-size:14px}
}

/* Service pages have their own jobs: design decisions versus project data. */
.design-service-hero{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;background:#f6f5f1}
.design-service-hero h1,.engineering-service-hero h1{font-size:46px;line-height:1.4}
.design-service-hero div>p:not(.product-kicker),.engineering-service-hero>p:not(.product-kicker){font-size:17px;line-height:1.9;color:var(--muted);margin:22px 0 28px}
.design-service-hero img{width:100%;height:350px;object-fit:cover}
.design-service-hero figcaption{font-size:11px;color:var(--muted);margin-top:10px}
.design-decisions h2,.design-materials h2,.engineering-schedule h2,.engineering-service-action h2{font-size:32px;line-height:1.4}
.design-decisions ol{list-style:none;padding:0;margin:32px 0 0}
.design-decisions li{display:grid;grid-template-columns:40px minmax(0,1fr) 240px;gap:26px;border-top:1px solid var(--line);padding:28px 0;align-items:center}
.design-decisions li>span{color:#007D9D;font-size:13px}
.design-decisions h3{font-size:24px;margin-bottom:10px}
.design-decisions li p{font-size:15px;line-height:1.9;color:var(--muted)}
.design-decisions li>a,.design-decisions li>strong{font-size:13px;font-weight:400;color:#007D9D}
.design-materials{display:grid;grid-template-columns:1fr 1fr;gap:28px 56px;background:#f6f5f1}
.design-materials ul{padding-left:22px;margin:0;align-self:center;color:var(--muted);font-size:16px;line-height:2.2}
.design-materials .primary-link{justify-self:start;align-self:start}
.design-materials .product-note{margin:0}
.engineering-service-hero{background:#eaf1f3}
.engineering-service-hero h1{max-width:1000px}
.engineering-table{margin-top:30px;border-top:2px solid #007D9D}
.engineering-table-head,.engineering-table-row{display:grid;grid-template-columns:180px 1fr 1fr;gap:28px;padding:23px 20px;border-bottom:1px solid var(--line);font-size:15px;line-height:1.9}
.engineering-table-head{background:#f0f4f5;font-size:12px;color:#007D9D}
.engineering-table-row strong{font-size:16px;font-weight:500}
.engineering-table-row p{color:var(--muted)}
.engineering-boundaries{display:grid;grid-template-columns:1fr 1fr;gap:56px;background:#f6f7f7}
.engineering-boundaries h2{font-size:28px}
.engineering-boundaries p{font-size:15px;color:var(--muted);line-height:1.9;margin:18px 0}
.engineering-boundaries a{font-size:14px}
.engineering-service-action{display:flex;justify-content:space-between;align-items:center;gap:32px}
@media(max-width:850px){
 .design-service-hero{gap:28px}
 .design-service-hero h1,.engineering-service-hero h1{font-size:36px}
 .design-decisions li{grid-template-columns:32px minmax(0,1fr) 170px;gap:20px}
 .engineering-table-head,.engineering-table-row{grid-template-columns:110px 1fr 1fr;gap:20px;padding-inline:12px}
}
@media(max-width:700px){
 .design-service-hero,.design-materials,.engineering-boundaries{grid-template-columns:1fr;gap:28px}
 .design-service-hero h1,.engineering-service-hero h1{font-size:32px}
 .design-service-hero div>p:not(.product-kicker),.engineering-service-hero>p:not(.product-kicker){font-size:15px}
 .design-service-hero img{height:250px}
 .design-decisions h2,.design-materials h2,.engineering-schedule h2,.engineering-service-action h2{font-size:28px}
 .design-decisions li{grid-template-columns:26px 1fr;gap:16px}
 .design-decisions li>a,.design-decisions li>strong{grid-column:2}
 .design-decisions h3{font-size:23px}
 .engineering-table-head{display:none}
 .engineering-table-row{grid-template-columns:1fr;gap:12px;padding:22px 0;font-size:14px}
 .engineering-table-row p:nth-child(2)::before{content:"已有资料：";color:#007D9D}
 .engineering-table-row p:nth-child(3)::before{content:"核对关系：";color:#007D9D}
 .engineering-service-action{flex-direction:column;align-items:flex-start;gap:24px}
}