@charset "UTF-8";
:root{--navy:#0b2036;--ink:#152e46;--muted:#62788c;--line:#d9e3e9;--pale:#f3f7f8;--white:#fff;--cyan:#50c6cd;--orange:#eab47d;--max:1200px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font:16px/1.75 "Noto Sans SC","Microsoft YaHei",Arial,sans-serif;background:var(--pale)}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}a:hover{color:#117c91}button{font:inherit}p{margin:0 0 1.1em}h1,h2,h3{line-height:1.25;letter-spacing:-.025em;margin:0 0 .65em}h1{font-size:clamp(2.35rem,5vw,4.6rem)}h2{font-size:clamp(1.8rem,3.1vw,2.65rem)}h3{font-size:1.24rem}.shell{width:min(calc(100% - 40px),var(--max));margin:auto}.eyebrow{font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;font-weight:800;color:#138ca0}.section{padding:90px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:34px}.section-head p{max-width:520px;color:var(--muted)}.site-header{position:relative;z-index:10;background:rgba(248,251,252,.97);border-bottom:1px solid 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50px rgba(9,32,50,.13)}.hero-bands a{padding:20px 23px;border-right:1px solid var(--line);display:block}.hero-bands a:last-child{border:0}.hero-bands strong,.band-tabs strong{display:block;line-height:1.3}.hero-bands span,.band-tabs span{display:block;font-size:.73rem;letter-spacing:.12em;color:#398b9c;font-weight:800}.hero-bands a:hover{background:#eaf5f6}.intro-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:8vw;align-items:center}.intro-copy p{color:var(--muted)}.media-frame{position:relative}.media-frame img{width:100%;aspect-ratio:1.55;object-fit:cover}.media-frame:after{content:"RELAY / 01";position:absolute;right:0;bottom:0;background:var(--navy);color:#cbe2e8;font-size:.75rem;letter-spacing:.12em;padding:9px 15px}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid #9fb6c2;border-bottom:1px solid #9fb6c2}.step{padding:28px 25px 30px;border-right:1px solid #c6d5dd}.step:last-child{border-right:0}.step .num{display:block;font-size:2.5rem;line-height:1;color:#8eb9c6;font-weight:300;margin-bottom:26px}.step p{color:var(--muted);font-size:.94rem}.dual-wrap{background:var(--navy);color:#fff;overflow:hidden}.dual-head{text-align:center;max-width:650px;margin:0 auto 42px}.dual-head p{color:#a9c1ce}.dual{display:grid;grid-template-columns:1fr 90px 1fr;align-items:stretch}.dual-panel{padding:35px;background:#16344e;border:1px solid #315168}.dual-panel img{width:100%;aspect-ratio:1.85;object-fit:cover;margin-bottom:25px}.dual-panel p{color:#bbd0da}.relay-node{display:flex;align-items:center;justify-content:center;color:var(--cyan);font-size:2rem}.scene-strip{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);background:#fff}.scene-strip div{padding:26px;border-right:1px solid var(--line)}.scene-strip div:last-child{border:0}.scene-strip span{font-size:.74rem;letter-spacing:.12em;color:#138ca0;font-weight:800}.scene-strip 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1fr;background:#fff;border:1px solid var(--line)}.support-label{background:#e0eef1;padding:30px;font-size:1.6rem;font-weight:800;line-height:1.3}.support-list{display:grid;grid-template-columns:repeat(2,1fr)}.support-list a{padding:22px 26px;border-left:1px solid var(--line);border-bottom:1px solid var(--line);font-weight:650}.support-list a:hover{background:#f3f9fa}.quick-links{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.quick-links a{padding:26px;background:#f8fbfc;border:1px solid var(--line);font-weight:750}.quick-links small{display:block;color:#138ca0;letter-spacing:.12em}.footer-cta{background:#dcecef;padding:50px 0}.footer-cta .shell{display:flex;align-items:center;justify-content:space-between;gap:30px}.footer-cta h2{margin:0}.site-footer{background:#0a2136;color:#d6e3e9;padding:44px 0 26px}.footer-top{display:flex;justify-content:space-between;gap:30px;border-bottom:1px solid #305063;padding-bottom:30px}.footer-nav{display:flex;flex-wrap:wrap;gap:10px 20px;max-width:670px}.footer-nav a{font-size:.9rem}.footer-bottom{padding-top:22px;color:#a9c0cb;font-size:.8rem;display:flex;flex-wrap:wrap;gap:8px 25px}.footer-bottom a{text-decoration:underline}.page-hero{background:linear-gradient(120deg,#0a243a,#1f4760);color:#fff;padding:80px 0 75px}.page-hero h1{font-size:clamp(2.2rem,4vw,3.65rem);max-width:900px}.page-hero p{max-width:730px;color:#c4d8e1}.crumbs{font-size:.83rem;color:#a8d3db;margin-bottom:30px}.crumbs a{text-decoration:underline}.content{padding:65px 0 90px}.content section{scroll-margin-top:25px}.lead{font-size:1.11rem;color:#456175;max-width:850px}.band-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:30px 0 42px}.band-tabs a{padding:20px 16px;background:#e0edf0;border-bottom:3px solid #479dae}.band-tabs a:hover{background:#cce5e8}.device-section{background:white;border:1px solid var(--line);display:grid;grid-template-columns:190px 1fr;margin:20px 0}.device-label{background:#12314b;color:white;padding:26px}.device-label span{font-size:.76rem;color:#88d2d7;letter-spacing:.12em}.device-body{padding:27px 34px}.device-body h2{font-size:1.65rem}.device-body h3{margin:22px 0 6px;font-size:1.06rem}.device-body p{color:#506a7b;margin-bottom:9px}.device-body .btn{margin-top:12px}.link-row{display:flex;flex-wrap:wrap;gap:10px;margin:30px 0}.link-row a{padding:10px 15px;border:1px solid #a9c7d0;background:#fff;font-weight:650}.resource-list{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin-top:25px}.resource-list a{background:#fff;border:1px solid var(--line);padding:11px;text-align:center;font-size:.9rem}.resource-list a:hover{background:#e8f4f5}.prose{max-width:850px}.prose h2{margin-top:1.5em}.prose h3{margin-top:1.25em}.prose p,.prose li{color:#455e70}.prose ul,.prose ol{padding-left:1.35em}.prose img{width:100%;aspect-ratio:1.8;object-fit:cover;margin:24px 0 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@media(max-width:680px){.shell{width:min(calc(100% - 28px),var(--max))}.header-inner{height:65px}.brand img{width:37px;height:37px}.menu-toggle{display:block}.nav{display:none;position:absolute;top:65px;left:0;right:0;background:#f8fbfc;padding:10px 18px 18px;border-bottom:1px solid var(--line);box-shadow:0 14px 25px rgba(0,0,0,.1)}.nav.open{display:grid;grid-template-columns:repeat(2,1fr);gap:4px 16px}.nav a{font-size:.9rem;padding:9px}.hero{min-height:570px}.hero-content{padding:75px 0 120px}.hero h1{font-size:2.45rem}.hero-bands{grid-template-columns:repeat(2,1fr);margin-top:-48px}.hero-bands a{padding:14px;border-bottom:1px solid var(--line)}.section{padding:62px 0}.section-head{display:block}.intro-grid,.dual,.support-preview,.device-section{grid-template-columns:1fr}.intro-grid{gap:25px}.steps{grid-template-columns:1fr 1fr}.step:nth-child(2){border-right:0}.step:nth-child(-n+2){border-bottom:1px solid var(--line)}.step{padding:20px}.step .num{margin-bottom:10px}.dual{gap:0}.relay-node{height:54px}.dual-panel{padding:20px}.scene-strip{grid-template-columns:1fr 1fr}.scene-strip div{padding:18px}.news-bands{display:block}.news-band,.news-band.wide{min-height:0;margin-bottom:10px;display:block}.news-band.wide img{display:none}.support-label{padding:18px}.support-list{grid-template-columns:1fr}.support-list a{border-left:0;padding:15px 18px}.quick-links{grid-template-columns:1fr 1fr}.quick-links a{padding:18px}.footer-cta .shell,.footer-top{display:block}.footer-cta .btn{margin-top:20px}.footer-nav{margin-top:22px}.page-hero{padding:55px 0}.content{padding:42px 0 70px}.band-tabs{grid-template-columns:1fr 1fr}.device-label{padding:16px}.device-body{padding:22px}.faq-groups{grid-template-columns:1fr}.resource-list{grid-template-columns:repeat(2,1fr)}.article-list a{display:block}.article-list small{display:block;margin-bottom:5px}}
@media(max-width:380px){.hero-bands,.steps,.scene-strip,.quick-links,.band-tabs{grid-template-columns:1fr}.brand{font-size:.88rem}.hero h1{font-size:2.05rem}}