:root{--steel-orange:#EA5414;--steel-ink:#1E2329;--steel-muted:#667085;--steel-line:#E9E9E9}
.steel-page{font:16px/1.55 Inter,"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;color:var(--steel-ink);background:#fff;overflow:hidden}
.steel-page *{box-sizing:border-box}.steel-page h1,.steel-page h2,.steel-page h3,.steel-page p,.steel-page figure{margin:0}.steel-page img{display:block;max-width:100%}
.steel-container{width:min(1240px,calc(100% - 160px));margin:auto}.steel-section{padding:54px 0}.steel-section-title{font-size:32px;line-height:1.22;font-weight:800;letter-spacing:-.02em;border-left:5px solid var(--steel-orange);padding-left:14px}.steel-section-lead{font-size:16px;color:var(--steel-muted);margin-top:9px!important}
.steel-hero{height:560px;background:#f8f8f6;position:relative;overflow:hidden}.steel-hero>img{position:absolute;right:0;top:0;width:72%;height:100%;object-fit:cover;object-position:center}.steel-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#fff 0%,rgba(255,255,255,.98) 25%,rgba(255,255,255,.86) 38%,rgba(255,255,255,.27) 58%,rgba(255,255,255,0) 78%)}.steel-hero .steel-container{position:relative;z-index:1;height:100%;display:flex;flex-direction:column;justify-content:center;align-items:flex-start}.steel-hero h1{font-size:clamp(52px,4.4vw,64px);font-weight:800;line-height:1.13;letter-spacing:-.03em;padding-top:15px;position:relative}.steel-hero h1::before{content:"";position:absolute;top:0;left:0;width:44px;height:4px;background:var(--steel-orange)}.steel-overview{max-width:600px;margin-top:38px}.steel-overview h2{font-size:23px;line-height:1.3;padding-left:13px;border-left:4px solid var(--steel-orange)}.steel-overview p{font-size:17px;line-height:1.75;color:#455165;margin-top:12px}
.steel-advantages{padding-top:58px;padding-bottom:62px}.steel-adv-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin-top:26px}.steel-adv{min-height:154px;display:flex;gap:14px;align-items:flex-start;padding:24px 18px;border:1px solid var(--steel-line);border-radius:12px;background:#fff;box-shadow:0 5px 22px rgba(30,35,41,.035);transition:border-color .2s}.steel-adv:hover{border-color:var(--steel-orange)}.steel-adv svg{flex:none;width:40px;height:40px;color:var(--steel-orange);transition:transform .2s}.steel-adv:hover svg{transform:scale(1.05)}.steel-adv h3{font-size:18px;line-height:1.35}.steel-adv p{font-size:14px;color:var(--steel-muted);margin-top:8px}
.steel-foundations{background:#FAF8F6;padding:64px 0 76px}.steel-foundation-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:32px;align-items:center;margin-top:27px}.steel-foundation-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.steel-foundation{overflow:hidden;background:#fff;border:1px solid var(--steel-line);border-radius:10px}.steel-foundation img{width:100%;height:150px;object-fit:cover}.steel-foundation>div{padding:15px}.steel-foundation h3{font-size:17px;line-height:1.35}.steel-foundation p{font-size:13px;color:var(--steel-muted);margin-top:6px}.steel-connection{min-width:0;text-align:center}.steel-connection img{width:100%;height:300px;object-fit:contain}.steel-connection figcaption{font-size:14px;color:var(--steel-muted);margin-top:8px}
.steel-engineering{padding:64px 0 48px}.steel-engineering-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:15px;margin-top:27px}.steel-engineering-item{min-height:182px;padding:20px 16px;border:1px solid var(--steel-line);border-radius:10px;background:#fafafa}.steel-engineering-item span{font-size:19px;font-weight:800;color:var(--steel-orange)}.steel-engineering-item h3{font-size:16px;line-height:1.35;margin-top:5px}.steel-engineering-item p{font-size:13px;line-height:1.55;color:var(--steel-muted);margin-top:8px}.steel-tip{margin-top:18px;padding:17px 21px;border:1px solid #f9e2d4;border-radius:8px;background:#FFF4EC;font-size:14px}.steel-tip strong{color:var(--steel-orange)}
.steel-resources{padding-top:48px;padding-bottom:47px}.steel-heading-row{display:flex;align-items:end;justify-content:space-between;gap:24px}.steel-heading-row a{color:var(--steel-orange);font-size:14px;font-weight:700}.steel-unavailable{color:#a0a6ad;font-size:14px}.steel-doc-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:22px}.steel-doc{min-height:100px;display:flex;align-items:center;gap:13px;padding:17px;border:1px solid var(--steel-line);border-radius:10px;background:#fff}.steel-file-icon{display:grid;place-items:center;flex:none;width:40px;height:46px;background:#fff0e8;border:1px solid #f4c6b2;border-radius:5px;color:var(--steel-orange);font-size:11px;font-weight:800}.steel-doc h3{font-size:17px;white-space:nowrap}.steel-doc p{font-size:13px;color:#98a2b3;margin-top:4px}.steel-download-pending{font-size:12px;color:#98a2b3;margin-left:auto;white-space:nowrap}
.steel-cases{padding:50px 0 52px;background:#FAF8F6}.steel-case-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:22px}.steel-case{overflow:hidden;border:1px solid var(--steel-line);border-radius:10px;background:#fff}.steel-case img{width:100%;height:190px;object-fit:cover}.steel-case>div{padding:15px 17px}.steel-case h3{font-size:18px}.steel-case p{font-size:14px;color:var(--steel-muted);margin-top:5px}
.steel-alternatives{padding:55px 0 68px}.steel-alt-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:13px;margin-top:22px}.steel-alt{border:1px solid var(--steel-line);border-radius:10px;overflow:hidden;background:#fafafa;transition:border-color .2s}.steel-alt:hover{border-color:var(--steel-orange)}.steel-alt img{width:100%;height:105px;object-fit:cover;transition:transform .35s}.steel-alt:hover img{transform:scale(1.03)}.steel-alt span{display:flex;align-items:center;justify-content:space-between;padding:12px;font-size:15px;font-weight:700}.steel-alt b{color:var(--steel-orange);font-size:19px}
.steel-cta{position:relative;min-height:250px;display:flex;align-items:center;background:#FAF8F6}.steel-cta>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.steel-cta::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(250,248,246,.99),rgba(250,248,246,.96) 48%,rgba(250,248,246,.3) 100%);z-index:1}.steel-cta .steel-container{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:30px}.steel-cta h2{font-size:31px;line-height:1.25}.steel-cta p{font-size:16px;color:var(--steel-muted);margin-top:10px;max-width:620px}.steel-cta-actions{display:flex;gap:12px;white-space:nowrap}.steel-cta-actions a{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 20px;border:1px solid var(--steel-orange);border-radius:7px;font-weight:700}.steel-cta-actions .primary{background:var(--steel-orange);color:#fff}.steel-cta-actions .secondary{background:#fff;color:var(--steel-orange)}
@media(max-width:1250px){.steel-container{width:calc(100% - 96px)}.steel-foundation-layout{grid-template-columns:1fr}.steel-connection img{height:330px}.steel-alt-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:900px){.steel-container{width:calc(100% - 48px)}.steel-adv-grid,.steel-doc-grid{grid-template-columns:repeat(2,1fr)}.steel-engineering-grid{grid-template-columns:repeat(3,1fr)}.steel-hero{height:600px}.steel-hero>img{width:100%}.steel-hero::after{background:linear-gradient(90deg,rgba(255,255,255,.99),rgba(255,255,255,.8) 62%,rgba(255,255,255,.2))}.steel-cta .steel-container{display:block}.steel-cta-actions{margin-top:22px}}
@media(max-width:650px){.steel-container{width:calc(100% - 34px)}.steel-hero{height:680px}.steel-hero>img{height:50%;object-position:center top}.steel-hero::after{background:linear-gradient(0deg,#fff 30%,rgba(255,255,255,.97) 50%,transparent 90%)}.steel-hero .steel-container{justify-content:end;padding-bottom:34px}.steel-hero h1{font-size:42px}.steel-overview{margin-top:24px}.steel-overview p{font-size:14px}.steel-section{padding:44px 0}.steel-section-title{font-size:26px}.steel-adv-grid,.steel-doc-grid,.steel-case-grid{grid-template-columns:1fr}.steel-foundation-grid{grid-template-columns:1fr}.steel-foundation img{height:190px}.steel-engineering-grid{grid-template-columns:repeat(2,1fr)}.steel-alt-grid{grid-template-columns:repeat(2,1fr)}.steel-cta-actions{flex-wrap:wrap}.steel-heading-row{align-items:flex-start}.steel-unavailable{display:none}}

.steel-foundation-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.steel-foundation img{height:140px}.steel-foundation-visual{min-width:0;text-align:center}.steel-foundation-visual img{width:100%;height:280px;object-fit:contain}.steel-foundation-visual figcaption{font-size:13px;color:var(--steel-muted);margin-top:7px}.steel-system{background:#fff;padding:70px 0}.steel-system img{width:100%;max-height:440px;object-fit:contain;margin-top:25px}
@media(max-width:650px){.steel-foundation-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.steel-foundation img{height:130px}.steel-system img{max-height:260px}}