:root{--base:#333534;--deep:#202221;--black:#0c0e0e;--ink:#f2f3f1;--muted:#a9acab;--line:rgba(242,243,241,.22);--soft:rgba(242,243,241,.11);--signal:#d9783b;--display:"Aptos Display","Bahnschrift SemiCondensed","Arial Narrow",sans-serif;--body:Aptos,"Segoe UI Variable Text",sans-serif;--mono:"Cascadia Mono",Consolas,monospace;--x:clamp(24px,5vw,86px);--hh:92px;--ease:cubic-bezier(.16,1,.3,1)}
*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--base)}body{margin:0;background:var(--base);color:var(--ink);font:17px/1.55 var(--body);overflow-x:hidden}body.menu-open{overflow:hidden}a{color:inherit}button{font:inherit}img{display:block;max-width:100%}h1,h2,h3,p{text-wrap:pretty}.skip-link{position:fixed;z-index:1000;top:12px;left:12px;transform:translateY(-160%);padding:10px 14px;background:var(--ink);color:var(--black)}.skip-link:focus{transform:translateY(0)}
.site-header{position:fixed;inset:0 0 auto;z-index:100;height:var(--hh);padding:0 var(--x);display:grid;grid-template-columns:150px 1fr auto;align-items:center;gap:36px;border-bottom:1px solid transparent;transition:height 350ms var(--ease),background 350ms ease,border-color 350ms ease}.site-header.is-scrolled{height:72px;background:rgba(38,40,39,.9);border-color:var(--soft);backdrop-filter:blur(14px)}.brand{display:block;width:120px;height:76px;overflow:hidden}.brand img{width:100%;height:100%;object-fit:cover;mix-blend-mode:screen}.primary-nav{justify-self:center;display:flex;align-items:center;gap:clamp(22px,2.8vw,48px)}.primary-nav a{position:relative;text-decoration:none;font:600 12px/1 var(--display);letter-spacing:.08em}.primary-nav a::after{content:"";position:absolute;left:0;right:100%;bottom:-9px;height:1px;background:var(--ink);transition:right 250ms var(--ease)}.primary-nav a:hover::after{right:0}.menu-button{display:none;min-width:68px;min-height:44px;padding:0;border:0;color:var(--ink);background:transparent;cursor:pointer;font:600 11px/1 var(--mono);letter-spacing:.09em}.menu-button i,.menu-button i::before{display:block;width:22px;height:1px;background:currentColor;transition:transform 250ms ease}.menu-button i::before{content:"";transform:translateY(6px)}.menu-button[aria-expanded=true] i{transform:rotate(45deg)}.menu-button[aria-expanded=true] i::before{transform:rotate(-90deg)}.mobile-nav{position:fixed;inset:0;z-index:90;padding:120px var(--x) 40px;background:rgba(32,34,33,.98)}.mobile-nav a{display:flex;align-items:baseline;gap:18px;padding:22px 0;border-bottom:1px solid var(--line);text-decoration:none;font:500 clamp(34px,8vw,58px)/1 var(--display)}.mobile-nav a span{color:var(--muted);font:10px/1 var(--mono)}
.visual-section{position:relative;min-height:100svh;overflow:hidden;isolation:isolate}.visual-image{position:absolute;inset:0;z-index:-3;width:100%;height:100%;object-fit:cover;transform:scale(1.025);transition:transform 1.6s var(--ease)}.visual-section.is-visible .visual-image{transform:scale(1)}.visual-shade{position:absolute;inset:0;z-index:-2;background:linear-gradient(90deg,rgba(20,22,21,.86),rgba(24,26,25,.38) 45%,rgba(12,14,14,.06) 72%),linear-gradient(0deg,rgba(12,14,14,.42),transparent 47%)}.shade-right{background:linear-gradient(270deg,rgba(13,15,15,.9),rgba(18,20,20,.54) 39%,rgba(20,22,22,.06) 67%),linear-gradient(0deg,rgba(9,11,11,.38),transparent 40%)}.shade-left{background:linear-gradient(90deg,rgba(12,14,14,.92),rgba(17,19,18,.62) 37%,rgba(12,14,14,.04) 66%)}.shade-full{background:linear-gradient(0deg,rgba(12,14,14,.86),rgba(20,22,21,.26) 65%,rgba(12,14,14,.34))}.scan-lines{position:absolute;inset:0;z-index:-1;opacity:.045;pointer-events:none;background:repeating-linear-gradient(0deg,transparent 0 3px,#fff 3px 4px);mix-blend-mode:overlay}.frame-corner{position:absolute;z-index:2;width:36px;height:36px;opacity:.8}.corner-a{top:calc(var(--hh) + 34px);right:var(--x);border-top:1px solid var(--line);border-right:1px solid var(--line)}.corner-b{right:var(--x);bottom:42px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.telemetry{position:absolute;z-index:3;display:flex;color:rgba(242,243,241,.62);font:9px/1 var(--mono);letter-spacing:.12em}.telemetry-top{top:calc(var(--hh) + 36px);left:var(--x);gap:30px}.telemetry-top span{display:inline-flex;align-items:center;gap:8px}.telemetry-top span::before{content:"";width:4px;height:4px;background:var(--signal)}.hero-content,.section-content,.mission-content{position:absolute;z-index:4;left:var(--x);bottom:clamp(72px,10vh,120px);max-width:760px}.kicker{margin:0 0 18px;font:600 11px/1.2 var(--mono);letter-spacing:.15em;text-transform:uppercase}.kicker::before{content:"";display:inline-block;width:36px;height:1px;margin-right:12px;background:currentColor;vertical-align:4px}h1,h2{margin:0;font-family:var(--display);font-weight:600;text-transform:uppercase;letter-spacing:-.045em}h1{font-size:clamp(64px,8.7vw,150px);line-height:.88}h2{font-size:clamp(50px,6.3vw,108px);line-height:.92}.hero-deck,.section-content>p:not(.kicker),.mission-content>p:not(.kicker){max-width:520px;margin:26px 0 32px;color:rgba(242,243,241,.75);font-size:clamp(16px,1.3vw,20px)}
.outline-button{position:relative;display:inline-grid;grid-template-columns:1fr 42px;min-width:210px;min-height:54px;align-items:center;padding-left:20px;border:1px solid rgba(242,243,241,.7);overflow:hidden;text-decoration:none;font:600 11px/1 var(--display);letter-spacing:.08em;text-transform:uppercase}.outline-button::before{content:"";position:absolute;inset:0;background:var(--ink);transform:translateX(-101%);transition:transform 330ms var(--ease);z-index:-1}.outline-button:hover{color:var(--black)}.outline-button:hover::before{transform:translateX(0)}.outline-button i{position:relative;width:20px;height:1px;background:currentColor}.outline-button i::after{content:"";position:absolute;right:0;top:-3px;width:7px;height:7px;border-top:1px solid;border-right:1px solid;transform:rotate(45deg)}.scroll-marker{position:absolute;z-index:3;right:var(--x);bottom:42px;display:flex;align-items:center;gap:12px;color:rgba(242,243,241,.62);font:9px/1 var(--mono);letter-spacing:.14em;transform:rotate(90deg) translateX(-100%);transform-origin:right bottom}.scroll-marker i{position:relative;display:block;width:72px;height:1px;background:var(--line);overflow:hidden}.scroll-marker i::after{content:"";position:absolute;inset:0;background:var(--ink);animation:scan 2.8s ease-in-out infinite}
.section-content{bottom:clamp(70px,9vh,112px)}.section-content.align-right{left:auto;right:var(--x);width:min(650px,48vw)}.section-index{position:absolute;z-index:3;top:calc(var(--hh) + 38px);right:var(--x);color:rgba(242,243,241,.55);font:10px/1 var(--mono);letter-spacing:.1em}.tech-tag{position:absolute;z-index:3;display:grid;grid-template-columns:22px auto;align-items:start;gap:9px;color:rgba(242,243,241,.62);font:8px/1.35 var(--mono);letter-spacing:.09em}.tech-tag b{display:grid;place-items:center;width:22px;height:22px;border:1px solid var(--line);color:var(--ink);font-weight:400}.tag-left{left:var(--x);top:32%}.tag-right{right:var(--x);top:31%}
.ground-link .visual-image{object-position:center center}.ground-link .section-content{max-width:720px}.ground-link .section-content>p:not(.kicker){max-width:590px}
.architecture{min-height:100svh;padding:clamp(130px,15vw,210px) var(--x) 78px;background-color:var(--base);background-image:linear-gradient(var(--soft) 1px,transparent 1px),linear-gradient(90deg,var(--soft) 1px,transparent 1px);background-size:10vw 10vw}.architecture-head{display:grid;grid-template-columns:1.15fr .85fr;align-items:end;gap:clamp(40px,9vw,150px);max-width:1500px;margin:0 auto clamp(80px,9vw,130px)}.architecture-head>p{max-width:470px;margin:0 0 8px;color:var(--muted)}.system-rail{max-width:1500px;margin:auto;border-top:1px solid var(--line)}.system-rail article{display:grid;grid-template-columns:70px 1fr auto;gap:28px;align-items:center;min-height:128px;border-bottom:1px solid var(--line);transition:background 220ms ease,padding 280ms var(--ease)}.system-rail article:hover{padding-inline:18px;background:rgba(242,243,241,.045)}.rail-id,.rail-code{color:var(--muted);font:9px/1 var(--mono);letter-spacing:.1em}.system-rail h3{margin:0 0 8px;font:500 clamp(25px,2.3vw,38px)/1 var(--display);text-transform:uppercase;letter-spacing:-.02em}.system-rail p{margin:0;color:var(--muted)}.data-band{display:grid;grid-template-columns:auto 1fr auto 1fr auto 1fr auto;align-items:center;gap:14px;max-width:1500px;margin:82px auto 0;color:var(--muted);font:8px/1 var(--mono);letter-spacing:.12em}.data-band i{height:1px;background:var(--line)}
.mission{min-height:105svh}.mission-image{object-position:62% center;filter:saturate(.55) contrast(1.08);transform:scale(1.14)}.mission.is-visible .mission-image{transform:scale(1.07)}.mission-content{left:50%;bottom:11vh;width:min(980px,calc(100% - 48px));max-width:none;text-align:center;transform:translateX(-50%)}.mission-content .kicker::before{display:none}.mission-content>p:not(.kicker){margin-inline:auto}.site-footer{min-height:330px;padding:56px var(--x) 40px;display:grid;grid-template-columns:1fr auto auto;grid-template-rows:1fr auto;align-items:center;gap:clamp(30px,4vw,68px);background:var(--deep);border-top:1px solid var(--soft)}.footer-brand img{width:170px;height:120px;object-fit:cover;mix-blend-mode:screen}.footer-brand p,.footer-note{color:var(--muted);font:9px/1.5 var(--mono);letter-spacing:.09em}.footer-links{display:flex;flex-direction:column;align-items:flex-end;gap:18px}.footer-links a{text-decoration:none;font:600 11px/1 var(--display);letter-spacing:.07em}.footer-links a:first-child{padding-bottom:10px;border-bottom:1px solid var(--line)}.footer-qr{width:clamp(174px,12vw,214px);margin:0;overflow:hidden}.footer-qr-viewport{width:100%;aspect-ratio:1;overflow:hidden;background:#fff}.footer-qr img{width:100%;height:100%;object-fit:contain}.footer-note{grid-column:1/-1;margin:0;padding-top:24px;border-top:1px solid var(--soft)}
.reveal{opacity:0;transform:translateY(30px);transition:opacity 900ms var(--ease),transform 900ms var(--ease)}.reveal.is-visible{opacity:1;transform:translateY(0)}.mission-content.reveal{transform:translate(-50%,30px)}.mission-content.reveal.is-visible{transform:translate(-50%,0)}a:focus-visible,button:focus-visible{outline:2px solid var(--ink);outline-offset:5px}@keyframes scan{0%,12%{transform:translateX(-100%)}68%,100%{transform:translateX(100%)}}
@media(max-width:900px){:root{--hh:76px}.site-header{grid-template-columns:1fr auto}.brand{width:100px;height:68px}.primary-nav{display:none}.menu-button{display:flex;align-items:center;justify-content:flex-end;gap:12px}.hero-image{object-position:64% center}.telemetry-top span:nth-child(n+2){display:none}.section-content.align-right{width:min(620px,calc(100vw - (var(--x) * 2)))}.architecture-head{grid-template-columns:1fr}.architecture-head>p{max-width:620px}}
@media(max-width:600px){:root{--x:22px}.visual-section{min-height:92svh}.hero-image{object-position:68% center}.visual-shade{background:linear-gradient(0deg,rgba(18,20,19,.92),rgba(20,22,21,.52) 52%,rgba(12,14,14,.1) 80%)}.shade-right,.shade-left{background:linear-gradient(0deg,rgba(12,14,14,.94),rgba(16,18,18,.48) 55%,rgba(10,12,12,.12) 78%)}.vehicle .visual-image{object-position:34% center}.ground-link .visual-image{object-position:66% center}.propulsion .visual-image{object-position:64% center}.hero-content,.section-content,.section-content.align-right{left:var(--x);right:var(--x);bottom:64px;width:auto}h1{font-size:clamp(56px,19vw,92px)}h2{font-size:clamp(44px,14vw,72px)}.hero-deck,.section-content>p:not(.kicker),.mission-content>p:not(.kicker){margin-block:20px 26px;font-size:16px}.section-index{top:calc(var(--hh) + 25px)}.tag-left,.tag-right{display:none}.architecture{padding-top:110px;background-size:25vw 25vw}.system-rail article{grid-template-columns:36px 1fr;padding-block:26px}.rail-code{grid-column:2}.data-band{grid-template-columns:auto 1fr auto;row-gap:18px}.data-band span:nth-of-type(n+3),.data-band i:nth-of-type(n+2){display:none}.mission-content{bottom:9vh}.site-footer{grid-template-columns:1fr;align-items:start}.footer-links{align-items:flex-start}.footer-qr{width:190px}.footer-note{grid-column:1}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition-duration:.01ms!important}.reveal{opacity:1;transform:none}.mission-content.reveal{transform:translateX(-50%)}}

/* Service-positioning copy: compact long Chinese display lines without changing section geometry. */
h1.long-title,h2.long-title{font-size:clamp(48px,5.8vw,96px);line-height:.98;letter-spacing:-.035em}
.footer-brand p,.footer-note{max-width:560px}
.footer-brand .footer-title{margin:14px 0 7px;color:var(--ink);font:600 clamp(17px,1.45vw,23px)/1.3 var(--display);letter-spacing:.02em}
.footer-brand .footer-title+p{margin:0}
.footer-note{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap}
.footer-note a{color:var(--ink);text-decoration:none;transition:opacity 180ms ease}
.footer-note a:hover{opacity:.68}
@media(max-width:600px){h1.long-title,h2.long-title{font-size:clamp(38px,11.8vw,58px);line-height:1.02}}