:root{--ink:#18212b;--muted:#66717d;--paper:#fbfcfd;--panel:#fff;--line:#e6e9ed;--violet:#5d4fc7;--violet2:#8075dc;--mist:#f2f1fb;--silver:#d8dde3;--good:#276c58;--max:1160px;--shadow:0 18px 55px rgba(30,38,50,.09)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);line-height:1.65}a{color:var(--violet);text-decoration-thickness:1px;text-underline-offset:3px}img,svg{max-width:100%;height:auto}.wrap{width:min(calc(100% - 36px),var(--max));margin:auto}.skip{position:absolute;left:-999px;top:0}.skip:focus{left:12px;top:12px;background:#fff;padding:10px;z-index:999}
.topbar{background:#141a21;color:#fff;text-align:center;font-size:.84rem;padding:8px 12px}.topbar a{color:#fff}.site-header{position:sticky;top:0;z-index:50;background:rgba(251,252,253,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.nav{height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:800;letter-spacing:-.03em}.brand-mark{width:34px;height:34px;border-radius:50%;border:7px solid var(--violet);box-shadow:inset 0 0 0 3px #fff;background:var(--silver)}.navlinks{display:flex;align-items:center;gap:24px}.navlinks a{color:var(--ink);text-decoration:none;font-size:.94rem;font-weight:650}.navlinks a:hover{color:var(--violet)}.menu{display:none;background:none;border:0;font-size:1.5rem}
.hero{padding:72px 0 54px;background:radial-gradient(circle at 82% 18%,#e8e5ff 0,transparent 31%),linear-gradient(145deg,#fff 0,#f4f6f8 72%)}.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:50px}.eyebrow{display:inline-flex;gap:8px;align-items:center;color:var(--violet);font-weight:800;text-transform:uppercase;letter-spacing:.1em;font-size:.76rem}.hero h1,.article-hero h1{font-size:clamp(2.35rem,5vw,4.9rem);line-height:1.02;letter-spacing:-.055em;margin:.2em 0}.lead{font-size:1.16rem;color:#4f5b67;max-width:720px}.hero-card{background:linear-gradient(150deg,#fff,#edf0f4);border:1px solid #fff;border-radius:30px;padding:36px;box-shadow:var(--shadow);min-height:370px;position:relative;overflow:hidden}.purifier{width:180px;height:280px;margin:5px auto;background:linear-gradient(90deg,#cbd0d6,#fff 45%,#c7ccd3);border-radius:80px 80px 42px 42px;box-shadow:0 25px 45px rgba(24,33,43,.18);position:relative}.purifier:before{content:"";position:absolute;width:120px;height:18px;border-radius:50%;background:#aeb5bd;left:30px;top:16px;box-shadow:inset 0 4px 8px rgba(0,0,0,.15)}.purifier:after{content:"PECO + HEPA";position:absolute;bottom:34px;left:0;right:0;text-align:center;font-size:.7rem;font-weight:800;letter-spacing:.12em;color:#5e6570}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:13px 20px;font-weight:800;text-decoration:none;border:1px solid transparent;cursor:pointer}.btn-primary{background:var(--violet);color:#fff}.btn-primary:hover{background:#493cae}.btn-secondary{border-color:#cfd4da;color:var(--ink);background:#fff}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}.disclosure{font-size:.78rem;color:var(--muted);margin-top:12px}
section{padding:58px 0}.section-title{font-size:clamp(1.8rem,3vw,2.7rem);letter-spacing:-.035em;margin:0 0 10px}.section-intro{color:var(--muted);max-width:760px;margin:0 0 30px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:24px;box-shadow:0 8px 30px rgba(30,38,50,.04)}.card h3{margin-top:0;letter-spacing:-.02em}.card p{color:#56616d}.card a.stretch{text-decoration:none;color:var(--ink)}.card a.stretch:hover{color:var(--violet)}.pill{display:inline-block;padding:5px 9px;border-radius:999px;background:var(--mist);color:var(--violet);font-size:.74rem;font-weight:800;text-transform:uppercase;letter-spacing:.06em}.money{background:#171e26;color:#fff}.money p{color:#c9d0d8}.money .card{background:#202934;border-color:#303b47}.money .card p{color:#cbd2d9}.money .card h3{color:#fff}.money .card a{color:#fff}
.article-hero{padding:56px 0 28px;background:linear-gradient(180deg,#f0effb,#fbfcfd)}.article-hero h1{font-size:clamp(2.25rem,5vw,4.2rem);max-width:900px}.breadcrumbs{font-size:.84rem;color:var(--muted);margin-bottom:18px}.breadcrumbs a{color:var(--muted)}.article-layout{display:grid;grid-template-columns:minmax(0,760px) 300px;gap:50px;padding:42px 0 70px}.article h2{font-size:1.75rem;letter-spacing:-.03em;margin-top:2.1em;line-height:1.2}.article h3{margin-top:1.7em}.article p,.article li{color:#394550}.article table{width:100%;border-collapse:collapse;margin:24px 0;font-size:.92rem}.article th,.article td{text-align:left;border-bottom:1px solid var(--line);padding:12px 10px;vertical-align:top}.article th{background:#f5f6f8}.callout{background:var(--mist);border-left:4px solid var(--violet);padding:18px 20px;border-radius:0 12px 12px 0;margin:24px 0}.offer{background:#171e26;color:#fff;border-radius:22px;padding:24px;margin:30px 0}.offer p{color:#d4d9df}.offer .btn{margin-top:4px}.sidebar{position:sticky;top:98px;height:max-content}.toc,.side-offer{border:1px solid var(--line);background:#fff;border-radius:18px;padding:20px;margin-bottom:18px}.toc strong,.side-offer strong{display:block;margin-bottom:10px}.toc a{display:block;color:#56616d;text-decoration:none;padding:5px 0;font-size:.9rem}.toc a:hover{color:var(--violet)}
.footer{background:#11171d;color:#d6dce2;padding:48px 0 24px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}.footer a{color:#d6dce2}.footer small{color:#99a4af}.legal{border-top:1px solid #2c343d;margin-top:30px;padding-top:20px}
.popup{position:fixed;inset:0;background:rgba(9,13,18,.62);z-index:100;display:none;align-items:flex-end;justify-content:center;padding:18px}.popup.show{display:flex}.popup-box{width:min(560px,100%);background:#fff;border-radius:24px;padding:28px;box-shadow:0 30px 90px rgba(0,0,0,.3);position:relative}.popup-close{position:absolute;right:15px;top:12px;border:0;background:#f1f2f4;width:36px;height:36px;border-radius:50%;font-size:1.2rem;cursor:pointer}.popup h2{margin:0 40px 8px 0;letter-spacing:-.03em}.popup p{color:#56616d}.popup .btn{width:100%}
.kicker{display:flex;gap:14px;align-items:center;margin:18px 0}.kicker span{font-size:.85rem;color:var(--muted)}.checklist{padding-left:0;list-style:none}.checklist li{padding:7px 0 7px 28px;position:relative}.checklist li:before{content:"✓";position:absolute;left:0;color:var(--good);font-weight:900}.compare{overflow:auto}.source-note{font-size:.82rem;color:var(--muted);border-top:1px solid var(--line);margin-top:40px;padding-top:18px}
@media(max-width:850px){.navlinks{display:none;position:absolute;left:0;right:0;top:72px;background:#fff;padding:20px 24px;border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start}.navlinks.open{display:flex}.menu{display:block}.hero-grid,.article-layout,.footer-grid{grid-template-columns:1fr}.hero{padding-top:45px}.hero-card{min-height:320px}.sidebar{position:static;order:-1}.toc{display:none}.grid{grid-template-columns:1fr 1fr}.article-layout{gap:10px}.popup{align-items:flex-end}.article-hero h1{font-size:2.55rem}}
@media(max-width:560px){.wrap{width:min(calc(100% - 26px),var(--max))}.grid{grid-template-columns:1fr}.hero h1{font-size:2.75rem}.hero-card{padding:24px}.nav{height:64px}.navlinks{top:64px}.article table{font-size:.82rem}.article th,.article td{padding:9px 6px}.actions .btn{width:100%}}