*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;color:#edf2f7;background:#0b1726;font:16px/1.65 Arial,Helvetica,sans-serif}a{color:inherit;text-decoration:none}button{font:inherit}.wrap{max-width:1280px;margin:auto;padding-left:40px;padding-right:40px}.topline{border-bottom:1px solid #233142;font-size:12px;color:#9aa9ba}.topline .wrap{display:flex;justify-content:space-between;padding-top:9px;padding-bottom:9px}.header-inner{display:flex;justify-content:space-between;align-items:center;gap:30px;padding-top:26px;padding-bottom:26px}.brand{display:flex;align-items:center;gap:12px;font-size:18px;font-weight:800;letter-spacing:.9px;white-space:nowrap}.brand small{display:block;font-size:8px;font-weight:400;letter-spacing:1.9px;color:#b0bdca;margin-top:3px}.header nav{display:flex;align-items:center;gap:30px;font-size:13px}.header nav a:hover{color:#ffad58}.nav-request{border:1px solid #495665;padding:10px 16px;border-radius:4px}.hero{display:grid;grid-template-columns:1.05fr 1fr;align-items:center;min-height:620px;padding-top:45px;padding-bottom:68px;gap:20px}.eyebrow{font-size:11px;font-weight:700;letter-spacing:2px;color:#ffa24a;display:flex;align-items:center;gap:10px;margin:0 0 24px}.eyebrow>span{width:6px;height:6px;background:#ff962e;border-radius:50%}h1{font-size:clamp(46px,4.7vw,66px);line-height:1.06;letter-spacing:-2.6px;font-weight:700;margin:0 0 26px}em{font-style:normal;color:#ff9c3c}.lead{max-width:440px;color:#b6c1ce;font-size:17px;line-height:1.7;margin-bottom:32px}.actions{display:flex;align-items:center;gap:25px;flex-wrap:wrap}.button{display:inline-flex;align-items:center;justify-content:space-between;gap:28px;padding:15px 20px;border-radius:4px;font-weight:700;font-size:13px}.primary{background:#ff9c3c;color:#111f2f}.primary:hover{background:#ffb165}.text-link{font-size:13px;font-weight:600}.text-link 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#2a3747;padding-top:26px;padding-bottom:26px;gap:40px}.benefits>div{display:flex;gap:20px;align-items:start}.benefits>div>span{font-size:12px;color:#ff9c3c;margin-top:2px}.benefits p{margin:0;color:#94a4b7;font-size:13px}.benefits strong{color:#e7edf4;font-weight:400}.section{padding-top:85px;padding-bottom:85px}.section-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:36px}h2{font-size:clamp(28px,3vw,40px);font-weight:500;line-height:1.2;letter-spacing:-1px;margin:0}.section-head .eyebrow{margin-bottom:17px}.section-head>p{font-size:13px;color:#98a9bc;max-width:340px;margin:0 0 3px}.categories{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.category{background:#142334;border:1px solid #2b3b4c;border-radius:7px;overflow:hidden;transition:transform .2s,border-color .2s}.category:hover{transform:translateY(-4px);border-color:#d88837}.category-copy{padding:25px}.category-num{font-size:10px;color:#ff9c3c;letter-spacing:1.4px}h3{font-size:18px;line-height:1.4;font-weight:500;margin:12px 0}.category h3{display:flex;justify-content:space-between;gap:10px}.category h3 span{color:#ff9c3c}.category p{font-size:13px;color:#a6b3c2;margin:0}.product-art{height:180px;background:radial-gradient(ellipse at 50% 100%,#3b4a58,#1a2b3d 65%);display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}.radiator{gap:4px;padding-top:25px}.radiator i{width:19px;height:112px;background:linear-gradient(90deg,#8999a5,#f5f6f3 40%,#a7b2ba 85%);border-radius:5px;box-shadow:2px 8px 14px #06111d}.radiator:after{content:'';position:absolute;width:240px;height:5px;background:#c4cbd0;bottom:39px}.pipes{gap:13px;transform:none}.pipes i{display:block;width:28px;height:155px;background:linear-gradient(90deg,#9bacae,#eff4e9 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#26384b;border-bottom:1px solid #26384b;padding:64px 0}.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:90px}.about-grid .eyebrow{margin-bottom:18px}.about-grid p:not(.eyebrow){color:#aab8c9;font-size:14px;margin-top:0}.about-grid .about-lead{font-size:20px!important;color:#e6edf4!important;line-height:1.5}.about-grid .text-link{display:inline-block;margin-top:15px}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:30px}.steps article{border-top:1px solid #3c4a59;padding-top:18px}.steps article>span{color:#ff9c3c;font-size:28px;font-weight:300}.steps h3{font-size:16px;margin-top:22px}.steps p{color:#97a8bb;font-size:13px}.installer-section{background:#192b3e;border:1px solid #3b4857;border-radius:8px;padding-top:50px;padding-bottom:50px;display:grid;grid-template-columns:1fr 1fr;gap:90px}.installer-section h2{font-size:38px}.installer-section p:not(.eyebrow){font-size:14px;color:#b1bfce;max-width:420px}.installer-section small{display:block;font-size:10px;color:#95a6b8;margin-top:14px}.sample{background:#0e1b2c;border:1px solid #3e4b5b;border-radius:8px;align-self:center;padding:25px;transform:rotate(-2deg);box-shadow:0 20px 40px #09122044}.sample>div{display:flex;justify-content:space-between;gap:15px;border-bottom:1px solid #293849;padding:18px 0;font-size:13px}.sample .sample-head{font-size:10px;letter-spacing:1.2px;padding-top:0;color:#aebccd}.sample strong{font-weight:500}.sample-label{color:#ffac5b}.sample p{font-size:11px!important;margin-bottom:0}.dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:#ff9c3c;margin-right:8px}.contacts{display:grid;grid-template-columns:1fr 1fr;gap:90px}.contacts .eyebrow{margin-bottom:18px}.contacts p:not(.eyebrow){color:#a4b5c8;font-size:14px}.contact-data{padding-top:30px}.phone{font-size:clamp(22px,2.5vw,34px);letter-spacing:-.7px;display:flex;justify-content:space-between;white-space:nowrap}.phone span{color:#ff9c3c}.email{display:block;font-size:18px;color:#ffae62;margin-top:18px}.contact-bottom{margin-top:34px;border-top:1px solid #344251;padding-top:22px;display:flex;justify-content:space-between;gap:20px;color:#a7b5c6;font-size:12px}.footer{border-top:1px solid #2c3949;padding:25px 0;font-size:10px;color:#8e9db0}.footer .wrap{display:flex;justify-content:space-between;gap:20px}.footer a{color:#c3ceda}.preview-note{margin-top:15px;font-size:10px;color:#6f8299}.skip{position:absolute;top:-60px;padding:12px;background:#ff9c3c;color:#101c2d;z-index:10}.skip:focus{top:0}a:focus-visible,button:focus-visible{outline:3px solid #ffb35f;outline-offset:5px}.menu-toggle{background:none;color:white;border:1px solid #526172;border-radius:4px;padding:7px 12px;font-size:13px}.menu-toggle[hidden]{display:none}@media(min-width:901px){.menu-toggle{display:none}}@media(max-width:1000px){.wrap{padding-left:24px;padding-right:24px}.header nav{gap:16px}.hero{gap:0}.hero-visual img{height:430px}.actions{gap:20px}.about-grid,.installer-section,.contacts{gap:40px}.category-copy{padding:20px}.category h3{font-size:16px}.phone{font-size:26px}}@media(max-width:900px){.header-inner{flex-wrap:wrap;gap:20px}.header nav{width:100%;justify-content:space-between}.js #navigation{display:none}.js #navigation.is-open{display:flex}.menu-toggle{margin-left:auto}.hero{min-height:0;padding-top:35px}.hero h1{font-size:48px}.hero-visual img{height:380px}.hero-tags{gap:10px;flex-wrap:wrap}.image-label{left:10px;padding:12px;bottom:25px}.section-head>p br{display:none}.categories{gap:12px}.category h3{font-size:15px}.category p br{display:none}}@media(max-width:650px){.wrap{padding-left:20px;padding-right:20px}.topline .wrap>span:last-child{display:none}.brand{font-size:14px}.brand small{font-size:7px;letter-spacing:1px}.header-inner{padding-top:20px;padding-bottom:20px}.header nav,.js #navigation.is-open{flex-wrap:wrap;gap:15px;font-size:12px}.hero{grid-template-columns:1fr;padding-bottom:30px}.hero h1{font-size:49px;letter-spacing:-2px}.eyebrow{font-size:9px;letter-spacing:1.4px}.lead{font-size:15px}.hero-visual{margin-top:20px}.hero-visual img{height:320px}.hero-tags{margin-top:24px}.benefits{grid-template-columns:1fr;gap:18px;padding-top:25px;padding-bottom:25px}.benefits>div{gap:20px}.section{padding-top:55px;padding-bottom:55px}.section-head{display:block}.section-head>p{margin-top:20px}.categories{grid-template-columns:1fr;gap:20px}.product-art{height:190px}.category-copy{padding:23px}.category h3{font-size:21px}.category p{font-size:14px}.additional{flex-direction:column}.about-grid,.installer-section,.contacts{grid-template-columns:1fr;gap:25px}.about-section{padding:45px 0}.steps{grid-template-columns:1fr 1fr;gap:25px}.installer-section{border-radius:0;padding-top:35px;padding-bottom:35px}.installer-section h2{font-size:32px}.sample{transform:none}.contact-data{padding-top:0}.phone{font-size:25px}.footer .wrap{flex-wrap:wrap}.footer .wrap>span:nth-child(2){order:3;width:100%}.contact-bottom{gap:10px}.image-label{bottom:30px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.category{transition:none}}

/* Approved RTC vector identity. */
.brand{min-width:0}.header-inner{column-gap:24px}
@media(max-width:1000px){}
@media(max-width:650px){.header-inner{column-gap:12px}.brand{flex:0 1 auto}.menu-toggle{padding:7px 9px}}
@media(max-width:360px){}

/* Readable public-page text and stacked mobile navigation. */
.header nav{font-size:15px;gap:22px}
.topline{font-size:14px}
.button,.text-link{font-size:16px}
.eyebrow{font-size:12px}
.hero-tags{font-size:14px;flex-wrap:wrap}
.benefits p,.section-head>p,.category p,.steps p{font-size:16px}
.additional,.contact-bottom,.footer,.image-label{font-size:14px}
.category-num,.hero-visual figcaption,.installer-section small,.sample .sample-head{font-size:12px}
.about-grid p:not(.eyebrow),.installer-section p:not(.eyebrow),.contacts p:not(.eyebrow),.sample>div{font-size:16px}
.sample p{font-size:14px!important}
.menu-toggle{font-size:16px;min-height:44px}
@media(max-width:1100px) and (min-width:901px){.header-inner{flex-wrap:wrap}.header nav{width:100%;justify-content:flex-end;gap:20px}}
@media(max-width:900px){
 .header nav,.js #navigation.is-open{flex-direction:column;align-items:stretch;justify-content:flex-start;gap:4px;font-size:17px}
 .header nav a{display:block;padding:12px 14px;min-height:48px;border-radius:6px}
 .header nav .nav-request{margin-top:8px}
 .header nav .nav-staff{color:#ffad61}
 .header nav a:hover{background:#192b3e}
}
@media(max-width:650px){
 .lead{font-size:17px}
 .eyebrow{font-size:12px;letter-spacing:1.1px}
 .hero-tags{gap:10px 16px}
 .footer .wrap{flex-direction:column;gap:12px}
}

.back-to-top{position:fixed;right:24px;bottom:24px;z-index:20;display:flex;align-items:center;justify-content:center;width:48px;height:48px;padding:0;border:1px solid #ffad58;border-radius:12px;background:#142538;color:#ffad58;box-shadow:0 4px 18px #0004;cursor:pointer}
.back-to-top[hidden]{display:none}
.back-to-top:hover{background:#ffad58;color:#0b1726}
@media(max-width:650px){.back-to-top{right:16px;bottom:calc(16px + env(safe-area-inset-bottom,0px))}}