@charset "UTF-8";
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20px}.sitemap-links{display:grid;grid-template-columns:repeat(3,1fr);gap:12px 30px;font-size:12px}.sitemap-links a{padding:7px 0;border-bottom:1px solid var(--line)}.sitemap-links a:hover{color:var(--orange)}.glossary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.glossary-card{padding:26px;border:1px solid var(--line)}.glossary-card h2{font-size:23px;margin:10px 0}.glossary-card p{font-size:12px;color:var(--muted)}.glossary-card:hover{background:var(--soft)}.no-js-msg{padding:15px;background:#f4d7bc;color:#5b381e;font-size:12px}.reading-progress{position:fixed;top:84px;height:2px;background:var(--orange);width:0;z-index:61}.notice-inline{font-size:11px;color:var(--muted);margin-top:18px}.not-found{padding:100px 0;text-align:center}.not-found strong{font:140px var(--mono);color:var(--orange);letter-spacing:-.08em}.not-found h1{font-size:34px}.not-found p{margin:20px auto 30px;color:var(--muted)}.filter-empty{display:none;padding:40px 0;color:var(--muted)}[hidden]{display:none!important}
@media(min-width:1700px){.hero-visual{right:-40px}.hero h1{font-size:86px}.hero-grid{min-height:650px}.hero{min-height:730px}.hero-visual{height:630px}.section{padding:115px 0}}
@media(max-width:1250px){.wrap{width:calc(100% - 72px)}.main-nav{gap:18px}.header-actions{gap:15px}.hero h1{font-size:64px}.hero-visual{right:-105px;width:67%}.article-layout{grid-template-columns:170px minmax(0,1fr);gap:35px}.article-layout>.article-aside{display:none}.selector-copy{padding:40px}.selector-controls{padding:40px 30px}.industry-link{padding:24px}.mini-product{padding:20px}.form-layout{grid-template-columns:1fr 320px;gap:35px}.section-head{gap:40px}.product-detail-hero{gap:40px}.hero-bottom{grid-template-columns:1fr 1fr 1fr 1.1fr}.hero-stat strong{font-size:31px}.hero-stat{gap:10px}}
@media(max-width:1000px){.main-nav{gap:15px;font-size:11px}.brand-word{font-size:23px}.brand-symbol{width:34px}.header-actions .search-link{display:none}.header-actions .btn{gap:13px;padding:8px 11px;font-size:11px}.header-main{gap:15px;height:76px}.hero h1{font-size:56px}.hero-visual{width:65%;height:490px;right:-85px;top:55px}.hero-copy>p{max-width:330px;font-size:12px}.hero-grid{min-height:550px}.hero-bottom{grid-template-columns:1fr 1fr 1fr}.hero-note{display:none}.hero{min-height:auto}.rail-grid a{font-size:10px;padding:18px 10px;gap:7px}.rail-grid svg{width:20px}.rail-grid span{display:none}.section{padding:75px 0}.section-head h2{font-size:34px}.mini-product{padding:17px}.mini-product h3{font-size:14px}.mini-product img{height:115px}.process-intro{gap:50px}.process-intro h2{font-size:34px}.industry-link{padding:20px}.industry-link h3{font-size:16px}.knowledge-layout{gap:35px;grid-template-columns:1fr 1.2fr}.knowledge-feature{padding:25px}.knowledge-feature h3{font-size:25px}.knowledge-list a{gap:14px;grid-template-columns:40px 1fr 24px;padding:22px 0}.knowledge-list h3{font-size:15px}.news-strip-grid{gap:30px}.product-grid{grid-template-columns:repeat(2,1fr)}.catalog-layout{grid-template-columns:180px 1fr;gap:30px}.detail-grid{grid-template-columns:1fr 250px;gap:35px}.form-layout{grid-template-columns:1fr}.form-layout>.form-aside{display:grid;grid-template-columns:1fr 1fr;gap:25px}.product-detail-art img{height:290px}.product-detail-info h1{font-size:30px}.footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:30px}.footer-contact{grid-column:1/-1;display:flex;gap:25px;align-items:center}.footer-contact h3{margin:0}.footer-contact a{margin:0}.page-intro h1{font-size:42px}.page-intro .intro-grid{gap:40px}.reading-progress{top:75px}.related-links{grid-template-columns:repeat(2,1fr)}.glossary-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){.wrap{width:calc(100% - 40px)}.site-header{backdrop-filter:none}.header-main{height:70px;gap:10px}.brand-word{font-size:22px}.brand-symbol{width:33px;height:33px}.brand-sub{font-size:7px;letter-spacing:.15em}.header-actions{margin-left:auto}.header-actions .btn{min-height:35px;padding:6px 10px;font-size:10px;gap:14px}.header-actions .btn .arrow{font-size:16px}.menu-toggle{display:block;padding:6px}.main-nav{display:none;position:absolute;left:0;right:0;top:69px;padding:20px;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:0 15px 20px #24302312;font-size:14px;flex-direction:column;align-items:stretch;gap:4px}.main-nav.open{display:flex}.main-nav a{padding:12px;border-bottom:1px solid var(--line)}.topline{padding-top:21px;font-size:8px;letter-spacing:0;gap:10px}.topline>span:last-child{display:none}.hero-grid{display:block;min-height:auto}.hero-copy{padding:38px 0 0}.hero-kicker{font-size:9px;margin-bottom:23px}.hero 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h3{font-size:15px}.knowledge-list p{font-size:10px}.news-strip{padding:35px 0 45px}.news-strip-grid{grid-template-columns:1fr;gap:25px}.news-strip-grid>a{padding-top:20px;border-top:1px solid var(--line)}.news-strip h2{font-size:24px}.news-strip h3{margin:10px 0;font-size:16px}.final-cta{padding:38px 0}.final-cta .wrap{align-items:flex-start;flex-direction:column;gap:23px}.final-cta h2{font-size:29px}.final-cta p{font-size:11px}.final-cta .btn{min-width:180px;font-size:12px}.site-footer{padding:45px 0 90px}.footer-grid{grid-template-columns:1fr 1fr;gap:30px}.footer-about{grid-column:1/-1}.footer-about p{max-width:300px;font-size:11px;margin-bottom:0}.footer-contact{grid-column:1/-1;display:block}.footer-contact h3{margin-bottom:15px}.footer-contact a{font-size:17px;margin-bottom:12px}.footer-bottom{font-size:8px;flex-direction:column;align-items:flex-start;gap:15px;margin-top:35px;padding-top:20px}.back-top{bottom:70px;right:12px;width:33px;height:33px;font-size:12px}.mobile-consult{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:55;height:52px;background:var(--paper);border-top:1px solid var(--line);align-items:center;justify-content:space-between;padding-left:20px;font-size:11px}.mobile-consult a{height:52px;min-width:145px;display:flex;align-items:center;justify-content:space-between;padding:12px 20px;background:var(--orange);color:white;gap:20px}.breadcrumb{font-size:9px;padding-top:22px;gap:8px}.page-intro{padding:32px 0}.page-intro .intro-grid{display:block}.page-intro h1{font-size:34px;margin-top:12px}.page-intro p{font-size:12px;margin-top:18px}.page-intro .intro-aside{display:none}.page-body{padding:30px 0 60px}.filter-tabs{gap:6px;margin-bottom:24px}.filter-tabs a,.filter-tabs button{font-size:10px;padding:8px 12px}.product-grid{grid-template-columns:1fr;gap:20px}.product-card img{height:235px}.product-card .card-copy{padding:22px}.product-card h2,.product-card h3{font-size:22px}.note-box{font-size:11px;margin:24px 0;padding:18px}.product-detail-hero{grid-template-columns:1fr;gap:30px;margin:25px 0 35px}.product-detail-art{padding:18px}.product-detail-art img{height:260px}.product-detail-info h1{font-size:31px;margin:13px 0 17px}.product-detail-info>p{font-size:12px}.product-detail-info .fact{font-size:11px;padding:13px 0}.detail-grid{grid-template-columns:1fr;gap:30px}.detail-grid>aside{display:grid;grid-template-columns:1fr;gap:0}.prose{font-size:13px;line-height:1.95}.prose h2{font-size:23px;margin-top:33px}.prose h3{font-size:18px}.prose table{font-size:11px;display:block;overflow:auto}.prose td,.prose th{padding:11px;min-width:110px}.article-layout{grid-template-columns:1fr;gap:27px}.article-toc{position:static;border:1px solid var(--line);padding:18px;display:grid;grid-template-columns:1fr 1fr;gap:0 18px}.article-toc h3{grid-column:1/-1;margin:0 0 8px}.article-toc a{padding:8px 0;font-size:10px}.article-title h1{font-size:29px;line-height:1.5}.article-meta{font-size:9px;gap:13px}.related-links{grid-template-columns:1fr;gap:10px}.related-links a{padding:18px;font-size:12px}.related-section{margin-top:40px;padding-top:26px}.related-section h2{font-size:22px}.catalog-layout{grid-template-columns:1fr;gap:25px}.catalog-sidebar{position:static;display:flex;gap:7px;overflow:auto;padding:2px 0 12px;margin-bottom:0}.catalog-sidebar>a{padding:8px 12px;border:1px solid var(--line);font-size:10px;white-space:nowrap;gap:15px;flex-shrink:0}.catalog-sidebar>a.active{background:var(--green);color:white}.search-input{gap:7px;margin-bottom:18px}.search-input input{padding:12px;font-size:12px}.search-input .btn{min-width:65px;padding:10px 13px;font-size:12px}.catalog-tools{font-size:10px}.article-row{padding:22px 0;gap:15px;grid-template-columns:1fr 22px}.article-row h2,.article-row h3{font-size:18px;line-height:1.55}.article-row p{font-size:11px;margin-top:9px}.article-row .row-meta{font-size:9px}.form-panel{padding:23px 20px}.form-panel h2{font-size:23px}.form-grid{gap:17px;grid-template-columns:1fr}.field{font-size:11px}.field input,.field select,.field textarea{font-size:14px;padding:12px}.form-layout>.form-aside{grid-template-columns:1fr;gap:0}.form-section-label{margin-top:25px}.selection-box{padding:25px 20px}.selection-box h2{font-size:24px}.selection-box .dewpoint-options button{font-size:20px;padding:15px 11px}.energy-calculator{padding:25px 20px}.energy-calculator .form-grid{grid-template-columns:1fr 1fr;gap:15px}.contact-grid{grid-template-columns:1fr}.contact-card{padding:28px}.contact-card a{font-size:17px}.about-statement{font-size:29px;line-height:1.6;margin:25px 0 35px}.about-grid{grid-template-columns:1fr;gap:30px;margin-top:35px;padding-top:28px}.about-grid h2{font-size:22px;margin-bottom:12px}.about-grid p{font-size:12px}.reference-table{font-size:10px;display:block;overflow:auto}.reference-table th,.reference-table td{padding:14px 10px}.reference-table td:first-child{min-width:70px}.reference-table td:nth-child(2){min-width:190px}.reference-table td:nth-child(3){min-width:120px}.download-row{grid-template-columns:42px 1fr;gap:16px;padding:24px 0}.download-row .file-icon{width:40px;height:48px;font-size:10px}.download-row h2{font-size:17px}.download-row p{font-size:11px}.download-row .btn{grid-column:2;justify-self:start;font-size:11px;min-height:37px;margin-top:-5px}.sitemap-links{grid-template-columns:1fr;gap:8px;font-size:11px}.sitemap-group h2{font-size:22px}.glossary-grid{grid-template-columns:1fr;gap:14px}.glossary-card{padding:22px}.glossary-card h2{font-size:22px}.reading-progress{top:69px}.not-found{padding:60px 0}.not-found strong{font-size:100px}.not-found h1{font-size:27px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
/* Product photography from the supplied AIRTEC catalogue. */
.hero-visual{right:-15px;width:52%;height:555px;top:16px}
.hero-visual img{object-fit:contain;object-position:50% 50%;mix-blend-mode:multiply}
.hero-visual:after{background:none}
.hero-visual:before{content:"";position:absolute;left:15%;right:10%;bottom:5%;height:35%;border-radius:50%;background:#cdd2c450;filter:blur(45px);z-index:-1}
.visual-caption{left:14%;bottom:-6px;max-width:80%;font-family:var(--sans);font-size:9px}
.visual-callout{right:-10px;bottom:65px}
.visual-dot{left:65%;top:34%}
.exhibit.dark{background:#dce3d4;color:var(--ink)}
.exhibit.dark img{filter:none}
.exhibit img,.mini-product img,.product-card img,.product-detail-art img,.aside-block>img{mix-blend-mode:multiply}
.exhibit img{height:285px}
.exhibit{min-height:465px}
.image-credit{font-size:9px;color:var(--muted);margin-bottom:12px;letter-spacing:0}
.model-library{margin:0 0 50px}
.model-library .section-heading-row h2{font-size:29px;margin-top:13px}
.model-group{border-top:1px solid var(--line)}
.model-group:last-of-type{border-bottom:1px solid var(--line)}
.model-group summary{display:flex;align-items:center;justify-content:space-between;gap:20px;cursor:pointer;padding:21px 0;font-size:13px;list-style:none}
.model-group summary::-webkit-details-marker{display:none}
.model-group summary b{font-family:var(--mono);font-size:18px;color:var(--green);margin-right:22px;letter-spacing:-.03em}
.model-group summary>span:last-child{font-size:10px;color:var(--muted);white-space:nowrap}
.model-group[open] summary{border-bottom:1px solid var(--line)}
.table-scroll{overflow:auto}
.model-table{width:100%;border-collapse:collapse;font-size:12px;line-height:1.6}
.model-table th,.model-table td{text-align:left;border-bottom:1px solid var(--line);padding:13px 20px}
.model-table th{font-size:10px;font-weight:500;color:var(--muted);background:var(--soft)}
.model-table td:first-child{font-family:var(--mono);font-weight:600;letter-spacing:.02em}
.model-table tr:last-child td{border-bottom:0}
.model-table tr:hover td{background:#e8ecdf}
.model-table a:hover{color:var(--orange)}
@media(min-width:1700px){.hero-visual{height:625px}}
@media(max-width:1000px){.hero-visual{width:51%;height:470px;right:-10px;top:53px}.visual-callout{right:0;bottom:40px;width:165px;font-size:10px}.visual-callout strong{font-size:21px}}
@media(max-width:760px){.hero-visual{position:relative;left:0;right:auto;top:0;width:100%;height:370px;margin-top:21px}.hero-visual img{object-fit:contain;object-position:center;height:350px}.visual-caption{bottom:0;left:0;max-width:100%;font-size:8px}.visual-callout{right:0;bottom:30px;width:150px;font-size:9px}.visual-dot{left:66%;top:31%}.hero-visual .visual-coordinate{right:2px;top:40px}.exhibit{min-height:420px}.exhibit img{height:270px}.model-library{margin-bottom:35px}.model-library .section-heading-row{display:block}.model-library .section-heading-row h2{font-size:26px}.model-library .section-heading-row .btn{margin-top:10px}.model-group summary{align-items:flex-start;font-size:11px;gap:10px;padding:18px 0}.model-group summary b{display:block;font-size:18px;margin-bottom:6px}.model-group summary>span:last-child{font-size:9px;padding-top:5px}.model-table{font-size:11px;min-width:420px}.model-table th,.model-table td{padding:12px}.model-table th{font-size:9px}}
.hero-visual{background:var(--paper)}

/* Contact information shared with the company's sales office. */
.footer-contact .footer-hotline{font-family:var(--mono);font-size:24px;letter-spacing:-.04em}
.footer-contact .footer-phone,.footer-contact .footer-email{font-size:13px;letter-spacing:0;overflow-wrap:anywhere}
.footer-contact small{font-size:11px;line-height:1.8}
.contact-main{align-items:stretch;margin-bottom:24px}
.contact-main .contact-card{padding:38px}
.contact-main .contact-card h2{font-size:27px;margin:15px 0 22px}
.contact-main .contact-hotline{display:inline-flex;align-items:center;gap:28px;font:38px/1.3 var(--mono);letter-spacing:-.06em;margin-bottom:14px}
.contact-main .contact-card>p{font-size:13px;max-width:420px;color:var(--muted)}
.contact-detail-list{margin:27px 0 0}
.contact-detail-list>div{border-top:1px solid var(--line);padding:17px 0}
.contact-detail-list dt{font-size:11px;letter-spacing:.05em;color:var(--muted);margin-bottom:6px}
.contact-detail-list dd{font-size:16px;margin:0;line-height:1.7}
.contact-detail-list dd a{font-size:17px;overflow-wrap:anywhere}
.contact-detail-list .contact-small-row{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.contact-followup{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);background:var(--soft);margin-top:24px}
.wechat-contact{display:flex;align-items:center;gap:30px;padding:35px}
.wechat-contact img{width:154px;height:154px;object-fit:contain;background:white;flex-shrink:0}
.contact-followup h2{font-size:25px;margin:14px 0}
.contact-followup p{font-size:13px;color:var(--muted);line-height:1.8}
.contact-online{padding:35px;border-left:1px solid var(--line)}
.contact-online .btn{margin-top:23px}
@media(max-width:1000px){.wechat-contact{gap:20px;padding:28px}.wechat-contact img{width:125px;height:125px}.contact-main .contact-card{padding:28px}.contact-main .contact-hotline{font-size:32px}.contact-followup h2{font-size:22px}}
@media(max-width:760px){.contact-main{gap:16px}.contact-main .contact-card{padding:25px}.contact-main .contact-card h2{font-size:23px}.contact-main .contact-hotline{font-size:31px}.contact-detail-list dd,.contact-detail-list dd a{font-size:15px}.contact-followup{grid-template-columns:1fr}.wechat-contact{padding:25px;gap:23px}.wechat-contact img{width:132px;height:132px}.contact-online{border-left:0;border-top:1px solid var(--line);padding:25px}.footer-contact .footer-hotline{font-size:25px}}