@font-face{font-family:Manrope;src:url(../fonts/manrope-cyrillic.woff2) format("woff2");font-weight:400 800;font-style:normal;font-display:swap}
@font-face{font-family:"IBM Plex Sans";src:url(../fonts/ibm-plex-sans-regular.woff2) format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"IBM Plex Sans";src:url(../fonts/ibm-plex-sans-semibold.woff2) format("woff2");font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:"IBM Plex Mono";src:url(../fonts/ibm-plex-mono-regular.woff2) format("woff2");font-weight:400;font-style:normal;font-display:swap}
:root{--zt-ink:#101820;--zt-graphite:#2b333b;--zt-blue:#0b5cad;--zt-blue-dark:#073d73;--zt-green:#70b62c;--zt-silver:#d9dee3;--zt-mist:#f3f5f6;--zt-paper:#fff;--zt-warning:#a64b00;--zt-shell:min(1280px,calc(100% - 48px));--zt-font:"IBM Plex Sans",Arial,sans-serif;--zt-head:Manrope,Arial,sans-serif;--zt-mono:"IBM Plex Mono",Consolas,monospace}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{margin:0;background:var(--zt-paper);color:var(--zt-ink);font-family:var(--zt-font);font-size:17px;line-height:1.62;text-rendering:optimizeLegibility}
body.admin-bar .zt-header-main{top:32px}
img{max-width:100%;height:auto}
a{color:var(--zt-blue);text-underline-offset:.18em}
a:hover{color:var(--zt-blue-dark)}
button,input,select,textarea{font:inherit}
button,a,summary,input,select,textarea{outline-offset:3px}
:focus-visible{outline:3px solid #ffd24d;outline-offset:3px}
h1,h2,h3,h4{font-family:var(--zt-head);line-height:1.08;margin:0 0 .65em;letter-spacing:-.025em;overflow-wrap:anywhere}
h1{font-size:clamp(2.55rem,6vw,5.6rem);max-width:16ch}
h2{font-size:clamp(2rem,3.6vw,3.35rem);max-width:22ch}
h3{font-size:clamp(1.28rem,2vw,1.7rem)}
p{margin:0 0 1.25em}
.zt-shell{width:var(--zt-shell);margin-inline:auto}
.zt-main{min-height:55vh}
.zt-narrow{max-width:820px;margin-inline:auto}
.zt-skip{position:fixed;left:16px;top:-100px;z-index:10000;padding:12px 18px;background:var(--zt-ink);color:#fff}
.zt-skip:focus{top:16px}
.zt-utility{background:var(--zt-ink);color:#dfe7ed;font-size:13px;letter-spacing:.02em}
.zt-utility .zt-shell{min-height:34px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.zt-utility a{color:#fff}
.zt-mini-search{display:flex;align-items:center;margin-left:auto}.zt-mini-search input{width:170px;height:26px;border:1px solid #5d6871;background:#fff;color:var(--zt-ink);padding:2px 8px;font-size:12px}.zt-mini-search button{height:26px;border:1px solid #8cc8ff;background:transparent;color:#fff;padding:2px 9px;font-size:12px;cursor:pointer}
.zt-header-main{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.98);border-bottom:1px solid var(--zt-silver)}
.zt-header-main .zt-shell{min-height:84px;display:flex;align-items:center;gap:30px}
.zt-brand{flex:0 0 220px;display:flex}.zt-brand img{width:220px}
.zt-nav{display:flex;align-items:center;gap:20px;margin-left:auto}
.zt-nav a{color:var(--zt-ink);font-size:15px;font-weight:600;text-decoration:none;white-space:nowrap}
.zt-nav a:hover{color:var(--zt-blue)}
.zt-button,.wp-block-button__link{display:inline-flex;min-height:48px;align-items:center;justify-content:center;padding:10px 20px;border:1px solid var(--zt-blue);border-radius:2px;background:var(--zt-blue);color:#fff;font-weight:600;text-decoration:none;cursor:pointer;transition:background-color .16s ease,border-color .16s ease,color .16s ease}
.zt-button:hover,.wp-block-button__link:hover{background:var(--zt-blue-dark);border-color:var(--zt-blue-dark);color:#fff}
.zt-button-secondary{background:transparent;color:var(--zt-blue)}
.zt-button-secondary:hover{background:var(--zt-mist);color:var(--zt-blue-dark)}
.zt-header-cta{white-space:nowrap;font-size:15px}
.zt-mobile-nav{display:none;margin-left:auto;position:relative}
.zt-mobile-nav summary{list-style:none;cursor:pointer;border:1px solid var(--zt-silver);padding:10px 14px;font-weight:600}
.zt-mobile-nav summary::-webkit-details-marker{display:none}
.zt-mobile-nav nav{position:absolute;right:0;top:calc(100% + 14px);display:grid;min-width:280px;background:#fff;border:1px solid var(--zt-silver);box-shadow:0 12px 24px rgba(16,24,32,.12)}
.zt-mobile-nav nav a{padding:12px 16px;border-bottom:1px solid var(--zt-silver);color:var(--zt-ink);text-decoration:none}
.zt-section{padding:clamp(70px,9vw,128px) 0}
.zt-section-sm{padding:56px 0}
.zt-section-mist{background:var(--zt-mist)}
.zt-section-dark{background:var(--zt-ink);color:#fff}
.zt-section-dark a:not(.zt-button){color:#9ed0ff}
.zt-section-dark .zt-card a:not(.zt-button){color:var(--zt-blue)}
.zt-kicker{margin-bottom:18px;color:var(--zt-blue);font-family:var(--zt-mono);font-size:13px;font-weight:600;letter-spacing:.09em;text-transform:uppercase}
.zt-section-dark .zt-kicker{color:#8cc8ff}
.zt-lead{max-width:790px;color:var(--zt-graphite);font-size:clamp(1.12rem,1.8vw,1.38rem);line-height:1.55}
.zt-section-dark .zt-lead{color:#cfdae3}
.zt-hero{position:relative;min-height:720px;display:flex;align-items:flex-end;background:#101820;color:#fff;overflow:hidden}
.zt-hero-media{position:absolute;inset:0}
.zt-hero-media::after{content:"";position:absolute;inset:0;background:rgba(6,20,31,.74)}
.zt-hero-media picture,.zt-hero-media img{display:block;width:100%;height:100%}
.zt-hero-media img{object-fit:cover;object-position:center}
.zt-hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:8fr 4fr;gap:48px;padding-block:92px 72px}
.zt-hero h1{font-size:clamp(2.6rem,6.3vw,6.2rem);max-width:16ch;overflow-wrap:normal;word-break:normal;hyphens:none}
.zt-hero-copy{max-width:740px;color:#e5edf4;font-size:1.23rem}
.zt-hero .zt-kicker{color:#8cc8ff}.zt-hero-note a{color:#9ed0ff}.zt-hero-note a:hover{color:#fff}
.zt-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.zt-hero .zt-button-secondary{border-color:#fff;color:#fff}
.zt-hero-note{align-self:end;border-left:1px solid rgba(255,255,255,.42);padding-left:28px}
.zt-hero-note strong{display:block;font-family:var(--zt-head);font-size:1.4rem;margin-bottom:12px}
.zt-hero-note p{color:#cfdae3;font-size:15px}
.zt-stat-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--zt-silver);border-left:1px solid var(--zt-silver);margin-top:46px}
.zt-stat{min-height:160px;padding:26px;border-right:1px solid var(--zt-silver);border-bottom:1px solid var(--zt-silver)}
.zt-stat-value{display:block;font-family:var(--zt-mono);font-size:clamp(1.65rem,3vw,2.55rem);line-height:1.1;color:var(--zt-blue)}
.zt-stat-label{display:block;margin-top:14px;color:var(--zt-graphite);font-size:14px}
.zt-grid{display:grid;gap:1px;background:var(--zt-silver);border:1px solid var(--zt-silver)}
.zt-grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.zt-grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.zt-grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.zt-card{position:relative;display:flex;min-height:100%;flex-direction:column;background:#fff;color:var(--zt-ink);text-decoration:none}
.zt-card-media{aspect-ratio:4/3;overflow:hidden;background:#e7ebee}
.zt-card-media img{width:100%;height:100%;object-fit:cover;transition:transform .2s ease}
.zt-card:hover .zt-card-media img{transform:scale(1.015)}
.zt-card-body{padding:28px;display:flex;flex:1;flex-direction:column}
.zt-card-type{margin-bottom:14px;color:var(--zt-blue);font-family:var(--zt-mono);font-size:12px;letter-spacing:.07em;text-transform:uppercase}
.zt-card h3{margin-bottom:12px;color:var(--zt-ink)}
.zt-card p{color:var(--zt-graphite);font-size:15px}
.zt-card-meta{display:flex;gap:12px;flex-wrap:wrap;margin-top:auto;padding-top:20px;color:var(--zt-graphite);font-family:var(--zt-mono);font-size:12px}
.zt-card-link{margin-top:auto;color:var(--zt-blue);font-weight:600}
.zt-heading-row{display:flex;align-items:end;justify-content:space-between;gap:40px;margin-bottom:44px}
.zt-heading-row>*{margin-bottom:0}
.zt-text-link{font-weight:600;white-space:nowrap}
.zt-two-col{display:grid;grid-template-columns:minmax(0,7fr) minmax(300px,4fr);gap:clamp(44px,8vw,110px);align-items:start}.zt-two-col>*{min-width:0}
.zt-rail{border-top:3px solid var(--zt-blue);background:var(--zt-mist);padding:28px}
.zt-rail dd,.zt-rail code{overflow-wrap:anywhere;word-break:break-word}
.zt-rail h2,.zt-rail h3{font-size:1.45rem}
.zt-source-note,.zt-warning{border-left:3px solid var(--zt-blue);background:var(--zt-mist);padding:20px 24px;margin:28px 0;font-size:15px}
.zt-warning{border-left-color:var(--zt-warning);background:#fff8ef}
.zt-breadcrumbs{padding:20px 0;border-bottom:1px solid var(--zt-silver);font-size:14px;color:var(--zt-graphite)}
.zt-breadcrumbs a{color:var(--zt-graphite)}
.zt-page-hero{padding:64px 0 52px;border-bottom:1px solid var(--zt-silver)}
.zt-page-hero h1{font-size:clamp(2.5rem,5vw,4.9rem)}
.zt-page-hero-grid{display:grid;grid-template-columns:8fr 4fr;gap:48px;align-items:end}
.zt-page-hero-meta{border-left:1px solid var(--zt-silver);padding-left:24px;color:var(--zt-graphite);font-size:14px}
.zt-product-hero{padding:34px 0 0}
.zt-product-grid{display:grid;grid-template-columns:minmax(0,6fr) minmax(0,6fr);gap:0;border:1px solid var(--zt-silver)}
.zt-product-image{min-height:540px;background:var(--zt-mist)}
.zt-product-image img{width:100%;height:100%;object-fit:cover}
.zt-product-summary{padding:clamp(32px,5vw,68px);display:flex;flex-direction:column;justify-content:center}
.zt-product-summary h1{font-size:clamp(2.15rem,3.2vw,3.2rem);overflow-wrap:break-word;word-break:normal;hyphens:auto}
.zt-product-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}
.zt-tag{padding:4px 9px;border:1px solid var(--zt-silver);font-family:var(--zt-mono);font-size:12px;color:var(--zt-graphite)}
.zt-product-gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.zt-product-gallery figure{margin:0;border:1px solid var(--zt-silver);background:var(--zt-paper)}
.zt-product-gallery img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover}
.zt-product-gallery figcaption,.zt-layer-figure figcaption{padding:12px 14px;color:var(--zt-graphite);font-size:13px;line-height:1.45}
.zt-product-overview{max-width:980px;margin-bottom:38px}.zt-technical-grid article,.zt-checklist-grid article{background:var(--zt-paper);padding:30px}.zt-technical-grid p{margin-bottom:0}.zt-checklist-grid ol,.zt-checklist-grid ul{margin:0;padding-left:1.35em}.zt-checklist-grid li{margin:.55em 0;padding-left:.25em}
.zt-layer-figure{margin:30px 0 0;border:1px solid var(--zt-silver);background:var(--zt-paper)}
.zt-layer-diagram{display:grid;grid-template-columns:minmax(90px,.7fr) minmax(90px,.85fr) minmax(150px,2.2fr) minmax(110px,1fr) minmax(120px,1.2fr);min-height:190px;padding:22px;background:linear-gradient(135deg,#e8edf1,#f8fafb)}
.zt-layer{display:flex;align-items:center;justify-content:center;padding:16px 10px;border:1px solid rgba(16,24,32,.22);font-family:var(--zt-mono);font-size:12px;line-height:1.35;text-align:center}
.zt-layer-outer{background:#eef2f5}.zt-layer-barrier{background:#a8c9e7}.zt-layer-core{background:#fff;border-style:dashed}.zt-layer-vacuum{background:#dcebf7}.zt-layer-seam{background:#173f61;color:#fff}
.zt-specs-wrap{max-width:100%;overflow-x:auto;margin:30px 0}
.zt-specs{width:100%;border-collapse:collapse;font-size:15px}
.zt-specs caption{text-align:left;padding:0 0 14px;font-weight:600}
.zt-specs th,.zt-specs td{text-align:left;vertical-align:top;padding:15px 14px;border-bottom:1px solid var(--zt-silver)}
.zt-specs th{width:32%;font-weight:600}.zt-specs td:nth-child(2){font-family:var(--zt-mono);font-weight:500}
.zt-specs thead th{background:var(--zt-mist);font-family:var(--zt-font);width:auto}
.zt-filterbar{display:grid;gap:18px;margin:30px 0;padding:22px;background:var(--zt-mist);border-top:1px solid var(--zt-silver);border-bottom:1px solid var(--zt-silver)}
.zt-filter-primary,.zt-filter-advanced{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.zt-filter-details{border-top:1px solid var(--zt-silver);padding-top:14px}.zt-filter-details summary{cursor:pointer;font-weight:700;color:var(--zt-blue);margin-bottom:14px}.zt-filter-details:not([open]) summary{margin-bottom:0}.zt-filter-actions{display:flex;gap:12px;align-items:center}.zt-filter-count{font-family:var(--zt-mono);font-weight:600;margin:0 0 20px}
.zt-field{display:flex;flex-direction:column;gap:7px}
.zt-field label{font-weight:600;font-size:14px}
.zt-field input,.zt-field select,.zt-field textarea{width:100%;min-height:48px;border:1px solid #9ca8b2;border-radius:1px;background:#fff;padding:10px 12px;color:var(--zt-ink)}
.zt-field textarea{min-height:132px;resize:vertical}
.zt-field small{color:var(--zt-graphite)}
.zt-section-dark .zt-field small,.zt-section-dark .zt-form small{color:#cfdae3}
.zt-form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.zt-form .zt-span-2{grid-column:1/-1}
.zt-check{display:flex;align-items:flex-start;gap:10px}.zt-check input{width:20px;height:20px;margin-top:3px}
.zt-honeypot{position:absolute;left:-10000px;width:1px;height:1px;overflow:hidden}
.zt-form-status{grid-column:1/-1;padding:14px 18px;border-left:3px solid var(--zt-blue);background:var(--zt-mist)}
.zt-form-status.is-error{border-left-color:#b42318;background:#fff1f0}
.zt-form-unavailable{color:var(--zt-ink)}
.zt-selection-groups{border-top:1px solid var(--zt-silver);padding-top:18px}.zt-selection-group{border:0;padding:0;margin:0}.zt-selection-group legend{font-size:1.25rem;font-weight:700;margin-bottom:18px}.zt-selection-group[hidden]{display:none}.zt-selection-group .zt-form{grid-template-columns:repeat(2,minmax(0,1fr))}
.zt-calc{border:1px solid var(--zt-silver);display:grid;grid-template-columns:5fr 7fr}
.zt-calc-controls{padding:30px;background:var(--zt-mist)}
.zt-calc-result{padding:30px;display:flex;flex-direction:column;justify-content:center}
.zt-calc-number{font-family:var(--zt-mono);font-size:clamp(2.5rem,5vw,5rem);line-height:1;color:var(--zt-blue)}
.zt-formula{font-family:var(--zt-mono);background:var(--zt-ink);color:#fff;padding:18px;margin:20px 0;overflow:auto}
.zt-calc-layer{display:grid;grid-template-columns:80px 1fr 1fr;gap:12px;align-items:end;border-top:1px solid var(--zt-silver);padding:14px 0}.zt-calc-layer>strong{align-self:center}.zt-heat-flow{border-top:1px solid var(--zt-silver);margin-top:24px;padding-top:18px}.zt-heat-flow summary{cursor:pointer;font-weight:700;margin-bottom:14px}
.zt-step-list{counter-reset:steps;list-style:none;padding:0;margin:32px 0;border-top:1px solid var(--zt-silver)}
.zt-step-list li{counter-increment:steps;display:grid;grid-template-columns:64px 1fr;gap:20px;padding:22px 0;border-bottom:1px solid var(--zt-silver)}
.zt-step-list li::before{content:counter(steps,decimal-leading-zero);font-family:var(--zt-mono);color:var(--zt-blue)}
.zt-article-section{padding:30px 0;border-bottom:1px solid var(--zt-silver)}.zt-article-section:first-of-type{padding-top:12px}.zt-article-section h2{font-size:clamp(1.65rem,3vw,2.35rem)}.zt-article-section li{margin-bottom:8px}
.zt-faq{border-top:1px solid var(--zt-silver)}
.zt-faq details{border-bottom:1px solid var(--zt-silver)}
.zt-faq summary{cursor:pointer;list-style:none;padding:22px 42px 22px 0;font-family:var(--zt-head);font-weight:650;position:relative}
.zt-faq summary::after{content:"+";position:absolute;right:8px;font-family:var(--zt-mono);font-size:1.4rem;color:var(--zt-blue)}
.zt-faq details[open] summary::after{content:"−"}.zt-faq details p{max-width:800px;padding-bottom:22px;color:var(--zt-graphite)}
.zt-tabs{display:flex;gap:0;border-bottom:1px solid var(--zt-silver);overflow:auto}
.zt-tabs a{padding:12px 18px;color:var(--zt-graphite);text-decoration:none;white-space:nowrap;border-bottom:3px solid transparent}
.zt-tabs a[aria-current="page"]{color:var(--zt-blue);border-color:var(--zt-blue);font-weight:600}
.zt-doc-row{display:grid;grid-template-columns:120px 1fr 180px;gap:28px;align-items:center;padding:24px 0;border-bottom:1px solid var(--zt-silver)}
.zt-doc-type{font-family:var(--zt-mono);font-size:13px;color:var(--zt-blue)}
.zt-doc-row h3{margin-bottom:6px}.zt-doc-row p{margin:0;color:var(--zt-graphite);font-size:14px}
.zt-doc-action{text-align:right}
.zt-patent-status{display:inline-flex;padding:4px 8px;border:1px solid var(--zt-silver);font-family:var(--zt-mono);font-size:11px}
.zt-compare-bar{position:fixed;z-index:90;left:50%;bottom:18px;transform:translateX(-50%);display:none;align-items:center;gap:14px;width:min(820px,calc(100% - 32px));padding:14px 16px;background:var(--zt-ink);color:#fff;box-shadow:0 10px 28px rgba(0,0,0,.22)}
.zt-compare-bar.is-active{display:flex}.zt-compare-bar p{margin:0;margin-right:auto}.zt-compare-bar button{min-height:40px}
.zt-compare-panel{border:0}.zt-compare-specs{margin:18px 0 26px;border-top:1px solid var(--zt-silver)}.zt-compare-specs div{display:grid;grid-template-columns:1fr auto;gap:16px;padding:10px 0;border-bottom:1px solid var(--zt-silver)}.zt-compare-specs dt{font-size:13px;color:var(--zt-graphite)}.zt-compare-specs dd{margin:0;font-family:var(--zt-mono);font-size:13px;text-align:right}
.zt-pagination{display:flex;gap:8px;margin-top:36px}.zt-pagination .page-numbers{padding:8px 13px;border:1px solid var(--zt-silver);text-decoration:none}.zt-pagination .current{background:var(--zt-ink);color:#fff}
.zt-footer{background:#e8ecef;border-top:1px solid var(--zt-silver);padding-top:60px;color:var(--zt-graphite)}
.zt-footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:52px}
.zt-footer-grid img{width:220px;margin-bottom:20px}.zt-footer-grid p{font-size:14px;max-width:370px}
.zt-footer-grid nav{display:flex;flex-direction:column;gap:10px}.zt-footer-grid strong{display:block;color:var(--zt-ink);margin-bottom:14px}
.zt-footer-grid a{color:var(--zt-ink);text-decoration:none}.zt-footer-grid a:hover{color:var(--zt-blue)}
.zt-footer-mail{display:block;font-size:1.12rem;font-weight:600;margin-bottom:14px}
.zt-footer-bottom{display:flex;justify-content:space-between;gap:24px;border-top:1px solid #c6cdd3;margin-top:54px;padding:20px 0;font-size:13px}
.screen-reader-text{clip:rect(1px,1px,1px,1px);clip-path:inset(50%);height:1px;width:1px;overflow:hidden;position:absolute!important;word-wrap:normal!important}
@media(max-width:1320px){.zt-nav,.zt-header-cta{display:none}.zt-mobile-nav{display:block}.zt-header-main .zt-shell{min-height:72px}.zt-brand,.zt-brand img{width:190px;flex-basis:190px}.zt-footer-grid{grid-template-columns:2fr 1fr 1fr}.zt-footer-grid>div:last-child{grid-column:1/-1}.zt-grid-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:800px){:root{--zt-shell:min(100% - 32px,1280px)}body{font-size:16px}.zt-utility span,.zt-mini-search{display:none}.zt-utility .zt-shell{justify-content:flex-end}.zt-section{padding:64px 0}.zt-hero{min-height:auto}.zt-hero-grid{grid-template-columns:1fr;padding:72px 0 54px}.zt-hero-note{border-left:0;border-top:1px solid rgba(255,255,255,.42);padding:24px 0 0}.zt-page-hero-grid,.zt-product-grid,.zt-two-col,.zt-calc{grid-template-columns:1fr}.zt-page-hero-meta{border-left:0;border-top:1px solid var(--zt-silver);padding:20px 0 0}.zt-product-image{min-height:380px}.zt-product-gallery{grid-template-columns:1fr 1fr}.zt-layer-diagram{grid-template-columns:1fr 1fr}.zt-layer-core{grid-column:1/-1;min-height:110px}.zt-stat-grid{grid-template-columns:repeat(2,1fr)}.zt-grid-3{grid-template-columns:1fr}.zt-filter-primary,.zt-filter-advanced{grid-template-columns:1fr 1fr}.zt-doc-row{grid-template-columns:90px 1fr}.zt-doc-action{grid-column:2;text-align:left}.zt-footer-grid{grid-template-columns:1fr 1fr}.zt-footer-grid>div:first-child,.zt-footer-grid>div:last-child{grid-column:1/-1}.zt-heading-row{align-items:flex-start;flex-direction:column}.zt-form{grid-template-columns:1fr}.zt-form .zt-span-2{grid-column:auto}.zt-selection-group .zt-form{grid-template-columns:1fr}}
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