*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--body);color:var(--ink);background:var(--bg);line-height:1.65;font-size:17px}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--head);line-height:1.15;margin:0 0 .5em;color:var(--hc,var(--ink))}
p{margin:0 0 1em}
ul{margin:0;padding:0;list-style:none}
section[id]{scroll-margin-top:84px}
.wrap{max-width:1140px;margin:0 auto;padding:0 22px}
.ic{flex:none}
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 26px;border-radius:var(--r);font-weight:700;font-size:16px;background:var(--accent);color:var(--on-accent,#fff);border:2px solid var(--accent);transition:.2s;cursor:pointer;font-family:var(--body)}
.btn:hover{filter:brightness(1.08);transform:translateY(-2px)}
.btn.ghost{background:transparent;color:var(--ghost,var(--accent))}
.btn.ghost:hover{background:var(--accent);color:var(--on-accent,#fff)}
.nav-toggle{display:none;background:none;border:0;padding:8px;cursor:pointer;color:inherit}
.nav-toggle span{display:block;width:26px;height:3px;background:currentColor;margin:5px 0;border-radius:2px}
.faq details{border-bottom:1px solid var(--line);padding:18px 0}
.faq summary{cursor:pointer;font-weight:700;font-size:18px;list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:26px;line-height:1;color:var(--accent);transition:.2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin:12px 0 0;color:var(--muted)}
footer a:hover{text-decoration:underline}
@media(max-width:860px){
 .nav-toggle{display:block}
 .menu{display:none}
 .menu.open{display:flex}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
:root{--head:'Manrope',sans-serif;--body:'Manrope',sans-serif;--ink:#0b2a5b;--bg:#f4f7fc;--accent:#ffd02e;--on-accent:#0b2a5b;--ghost:#fff;--blue:#0d47a1;--muted:#4d618a;--line:#cdd9ee;--r:4px;--mono:'IBM Plex Mono',monospace}
.nav{background:var(--blue);color:#fff;position:sticky;top:0;z-index:50}.nav .wrap{display:flex;justify-content:space-between;align-items:center;height:70px}
.logo{font-weight:800;font-size:19px;letter-spacing:.01em;display:flex;gap:10px;align-items:center}.logo em{font-style:normal;font-family:var(--mono);background:var(--accent);color:var(--ink);padding:2px 8px;font-size:14px}
.menu{display:flex;gap:24px;align-items:center;font-weight:600;font-size:15px}.menu a:hover{color:var(--accent)}
.btn{font-weight:800}.btn.ghost{border-color:#fff}.btn.ghost:hover{background:#fff;color:var(--blue)}
.hero{background:var(--blue);color:#fff;background-image:linear-gradient(rgba(255,255,255,.14) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.14) 1px,transparent 1px),linear-gradient(rgba(255,255,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.07) 1px,transparent 1px);background-size:100px 100px,100px 100px,20px 20px,20px 20px;padding:84px 0}
.hero .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center}
.hero .k{font-family:var(--mono);font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:14px}
.hero h1{font-size:clamp(38px,5.8vw,72px);font-weight:800;color:#fff;letter-spacing:-.03em;line-height:1.02}.hero h1 span{color:var(--accent)}
.hero p{color:#cfe0ff;font-size:19px;max-width:520px;margin-top:16px}.btns{display:flex;gap:14px;flex-wrap:wrap;margin-top:24px}
.draw{border:2px solid #fff;padding:12px;position:relative}.draw img{width:100%;aspect-ratio:4/3;object-fit:cover;filter:grayscale(.2) contrast(1.05)}
.draw::before{content:"FIG. 01 — OUTDOOR UNIT";position:absolute;left:12px;top:-12px;background:var(--blue);padding:0 10px;font-family:var(--mono);font-size:12px;color:var(--accent);letter-spacing:.08em}
.sec{padding:84px 0}.sec h2{font-size:clamp(30px,4vw,46px);font-weight:800;letter-spacing:-.02em;color:var(--ink)}.lead{color:var(--muted);max-width:560px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin-top:34px}
.col{background:#fff;border:2px solid var(--ink);padding:34px;position:relative}.col .lab{position:absolute;top:-14px;left:22px;background:var(--accent);color:var(--ink);font-family:var(--mono);font-weight:600;font-size:13px;padding:3px 12px;letter-spacing:.1em}
.col h3{font-size:30px;font-weight:800;margin:6px 0 4px;color:var(--ink)}.col>p{color:var(--muted)}
.col ul li{display:grid;grid-template-columns:34px 1fr;gap:4px 10px;padding:14px 0;border-top:1px dashed var(--line)}.col .ic{color:var(--blue);grid-row:span 2;margin-top:2px}.col b{font-size:17px}.col li span{color:var(--muted);font-size:15px}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:34px;counter-reset:s;border:2px solid var(--ink);background:#fff}
.steps div{padding:26px;border-right:2px solid var(--ink);counter-increment:s}.steps div:last-child{border-right:0}.steps div::before{content:"STEP 0" counter(s);font-family:var(--mono);font-size:13px;color:var(--blue);font-weight:600;letter-spacing:.1em;display:block;margin-bottom:8px}
.steps b{font-size:19px;display:block;margin-bottom:4px}.steps span{color:var(--muted);font-size:15px}
.about{background:#fff;border-block:2px solid var(--ink)}.about .wrap{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}.about img{width:100%;aspect-ratio:4/3;object-fit:cover;border:2px solid var(--ink)}.about p{color:var(--muted)}
.specs{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}.specs span{font-family:var(--mono);font-size:13px;border:2px solid var(--ink);padding:6px 12px}
.faq-wrap{display:grid;grid-template-columns:.7fr 1.3fr;gap:60px}
.contact{background:var(--blue);color:#fff;padding:76px 0;background-image:linear-gradient(rgba(255,255,255,.1) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.1) 1px,transparent 1px);background-size:40px 40px}
.contact .wrap{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}.contact h2{color:#fff;font-size:clamp(30px,4vw,46px);font-weight:800}.contact a.num{display:block;font-weight:800;font-size:clamp(34px,5vw,58px);color:var(--accent);margin:6px 0 10px}
.contact li{display:flex;gap:12px;padding:10px 0;border-bottom:1px dashed rgba(255,255,255,.4);overflow-wrap:anywhere}.contact .ic{color:var(--accent);margin-top:3px}
.foot{background:#071b3d;color:#a9bddf;padding-top:42px;font-size:15px}.foot-in{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:30px}.foot-name{color:#fff;font-size:18px}.copy{border-top:1px solid #1b3a72;margin-top:30px;padding:18px 22px 24px;font-size:13px}
@media(max-width:860px){.hero .wrap,.two,.steps,.about .wrap,.faq-wrap,.contact .wrap,.foot-in{grid-template-columns:1fr}.steps div{border-right:0;border-bottom:2px solid var(--ink)}.steps div:last-child{border-bottom:0}.hero{padding:50px 0}.sec{padding:56px 0}
.menu{position:absolute;top:70px;left:0;right:0;background:var(--blue);flex-direction:column;padding:22px;gap:16px;align-items:flex-start}.logo{font-size:15px}.nav-toggle{color:#fff}}