.source-band{border-top:1px solid var(--line);padding:22px 0;color:var(--muted);font-size:14px}.source-band a{color:var(--red)}.air-hero{padding:68px 0 64px}.air-hero-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:70px;align-items:center}.air-hero h1{max-width:760px}.air-summary{background:var(--soft);border-top:3px solid var(--red);padding:28px}.air-summary strong{display:block;font-size:12px;letter-spacing:.14em;text-transform:uppercase;margin-bottom:12px}.air-summary span{display:block;padding:11px 0;border-bottom:1px solid #dfe1e4;color:var(--muted)}.flow-section{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:35px 0}.air-flow{display:grid;grid-template-columns:repeat(5,1fr)}.air-flow div{padding:12px 19px;border-left:1px solid var(--line)}.air-flow b{display:block;color:var(--red);font-size:12px;margin-bottom:8px}.air-flow strong,.air-flow span{display:block}.air-flow span{color:var(--muted);font-size:13px;margin-top:4px}.air-cards,.room-grid{display:grid;grid-template-columns:repeat(3,1fr);border-left:1px solid var(--line);border-top:1px solid var(--line)}.air-card,.room-card{padding:27px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}.air-card h3,.room-card h3{margin:0 0 11px;font-size:21px}.air-card p,.room-card p{margin:0;color:var(--muted);font-size:15px}.air-note{margin-top:24px;border-left:3px solid var(--red);padding:18px 22px;background:var(--soft);color:var(--muted)}.air-note strong{color:var(--ink)}.air-assessment{display:grid;grid-template-columns:1fr 1fr;gap:85px;align-items:start}.air-assessment p{color:var(--muted)}.air-assessment ul{margin:0;padding:0;list-style:none;border-top:1px solid var(--line)}.air-assessment li{padding:13px 0 13px 23px;border-bottom:1px solid var(--line);position:relative}.air-assessment li:before{content:'—';position:absolute;left:0;color:var(--red)}.air-quality{border-top:1px solid var(--line)}.quality-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.quality-grid div{border:1px solid var(--line);padding:22px}.quality-grid strong,.quality-grid span{display:block}.quality-grid span{color:var(--muted);margin-top:5px}.scope-note{color:var(--muted);font-size:14px;margin-top:24px}.lex-link{display:flex;align-items:center;justify-content:space-between;gap:40px}.lex-link p{color:var(--muted);max-width:720px}.breadcrumb{margin-bottom:28px}@media(max-width:980px){.air-hero-grid{gap:35px}.air-flow{grid-template-columns:repeat(3,1fr)}.air-flow div:nth-child(n+4){border-top:1px solid var(--line)}.air-cards,.room-grid{grid-template-columns:repeat(2,1fr)}.air-assessment{gap:40px}}@media(max-width:680px){.air-hero{padding:40px 0 48px}.air-hero-grid{grid-template-columns:1fr}.air-hero h1{font-size:42px}.air-flow{grid-template-columns:1fr}.air-flow div{border-left:0;border-top:1px solid var(--line)}.air-flow div:first-child{border-top:0}.air-cards,.room-grid{grid-template-columns:1fr}.air-assessment{grid-template-columns:1fr}.quality-grid{grid-template-columns:1fr}.lex-link{align-items:flex-start;flex-direction:column}}