*{box-sizing:border-box}body{margin:0;font:17px/1.6 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#1d2a33;background:#fff}
a{color:#0e5a8a}.w{max-width:960px;margin:0 auto;padding:0 22px}
header{padding:18px 0;border-bottom:1px solid #eef1f3}.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:#12324a;text-decoration:none}
.hero{padding:56px 0 44px;background:linear-gradient(180deg,#f3f8fb,#fff)}h1{font-size:clamp(30px,5vw,46px);line-height:1.15;margin:0 0 18px;color:#0f2b40;max-width:820px}
.sub{font-size:19px;max-width:700px;color:#3b4b57}form.su{display:flex;gap:10px;flex-wrap:wrap;margin:26px 0 8px;max-width:600px}
form.su input[type=email]{flex:1 1 260px;padding:15px 16px;font-size:17px;border:1.5px solid #c9d4dc;border-radius:10px}
button{background:#e2702a;color:#fff;border:0;border-radius:10px;padding:15px 22px;font-size:17px;font-weight:700;cursor:pointer}
.micro{font-size:14px;color:#5d6d78;max-width:600px}section{padding:44px 0}h2{font-size:27px;line-height:1.25;color:#0f2b40;margin:0 0 16px}
.body p{max-width:700px}ol.q{padding-left:22px;max-width:720px}ol.q li{margin:10px 0}
.cards{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}.card{border:1px solid #e3e9ee;border-radius:12px;padding:16px 18px;background:#fff}
.tag{display:inline-block;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;padding:3px 9px;border-radius:20px;margin-right:6px}
.heating{background:#fde9dc;color:#a4460f}.cooling{background:#dcefff;color:#0e5a8a}.heatpump{background:#e1f5e8;color:#1d7a43}
.meta{font-size:13px;color:#6b7a85}.work{margin:8px 0;font-weight:600}.tip{font-size:14px;background:#f6f9fb;border-left:3px solid #e2702a;padding:8px 10px;border-radius:6px}
.alt{background:#f7fafc}footer{padding:34px 0;font-size:14px;color:#5d6d78;border-top:1px solid #eef1f3}
.hp{position:absolute;left:-9999px}.filt button{background:#eef3f7;color:#12324a;padding:8px 14px;font-size:14px;margin:0 6px 8px 0}.filt button.on{background:#12324a;color:#fff}