:root{--black:#000;--wine:#1a0505;--red:#ef233c;--white:#fff;--blue:#3b82f6;--muted:#a9a4a5;--line:rgba(255,255,255,.14);--glass:rgba(18,7,8,.67);font-family:Inter,"Microsoft YaHei",system-ui,sans-serif;color:var(--white);background:var(--black)}
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@media(max-width:420px){.header-action{font-size:9px}.hero h1{font-size:54px}.hero-media{height:390px}.products-media,.surfaces-media,.manufacturing-media,.quality-media,.development-media,.contact-media{height:330px}.band-heading>p:not(.section-label),.surface-copy>p:not(.section-label),.application-copy>p:not(.section-label),.quality-copy>p:not(.section-label),.development-heading>p:not(.section-label),.contact-copy>p:not(.section-label){font-size:13px}.surface-copy dl div{grid-template-columns:115px 1fr}.boundary-rail{grid-template-columns:1fr}.boundary-rail span{border-right:0}.sources{border-radius:9px}.contact-copy dl div{grid-template-columns:95px 1fr}}
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.mobile-nav[open] summary{background:rgba(239,35,60,.14);color:#fff}
.mobile-nav nav{position:absolute;right:0;top:47px;min-width:174px;padding:8px;border:1px solid var(--line);border-radius:10px;background:rgba(0,0,0,.96);box-shadow:0 22px 60px rgba(0,0,0,.55)}
.mobile-nav nav a{padding:12px 14px;border-bottom:1px solid rgba(255,255,255,.08);color:#d7d1d3!important;font-size:11px!important}
.mobile-nav nav a:last-child{border-bottom:0}
.sources article{display:grid;grid-template-columns:48px 1fr auto;align-items:center;gap:12px;padding:15px 18px;border-top:1px solid rgba(0,0,0,.12)}
.sources article span{color:#d3122a;font:800 10px ui-monospace,monospace}
.sources article b{font-size:11px}
.sources article small{color:#6d6668}
@media(max-width:980px){.header-action{display:none}.mobile-nav{display:block}.site-header .mobile-nav nav{display:grid}.sources article{grid-template-columns:32px 1fr}.sources article small{grid-column:2}}