@font-face{font-family:"Smiley Sans";src:url("assets/fonts/smiley-sans-display.woff2") format("woff2");font-display:swap}
:root{--blue:#1746e0;--blue-deep:#0d2b91;--yellow:#ffd71a;--black:#0b0d12;--gray:#b8c0cb;--white:#f5f7fb;--ink:#151922;--muted:#5c6574;--line:#d7dce4;--ease:cubic-bezier(.16,1,.3,1)}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--white);color:var(--ink);font-family:"Segoe UI","Microsoft YaHei",sans-serif;line-height:1.65;overflow-x:hidden}
body::selection{background:var(--yellow);color:var(--black)}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-underline-offset:.28em;text-decoration-thickness:1px}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--yellow);outline-offset:4px}
::-webkit-scrollbar{width:12px}::-webkit-scrollbar-track{background:#dfe3eb}::-webkit-scrollbar-thumb{background:var(--blue);border:3px solid #dfe3eb}
.skip-link{position:fixed;z-index:100;left:16px;top:12px;padding:10px 16px;background:var(--yellow);color:var(--black);transform:translateY(-150%);transition:transform .2s}
.skip-link:focus{transform:translateY(0)}
.site-header{position:sticky;z-index:50;top:0;min-height:74px;display:flex;align-items:center;justify-content:space-between;padding:10px clamp(20px,4vw,68px);background:rgba(245,247,251,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}.brand img{width:44px;height:44px}.brand span{display:flex;flex-direction:column;line-height:1.1}.brand strong{font-size:15px;letter-spacing:.04em}.brand small{margin-top:5px;color:var(--muted);font-size:9px;letter-spacing:.14em}
.site-nav{display:flex;align-items:center;gap:clamp(18px,2.5vw,40px)}.site-nav a{min-height:44px;display:inline-flex;align-items:center;font-size:14px;font-weight:650;text-decoration:none}.site-nav a:hover{text-decoration:underline}.site-nav .nav-action{padding:0 20px;background:var(--black);color:var(--white)}
.menu-toggle{display:none;min-width:52px;min-height:46px;border:0;background:var(--black);color:var(--white);align-items:center;justify-content:center;gap:8px}.menu-toggle i,.menu-toggle i::after{display:block;width:15px;height:1px;background:currentColor;content:""}.menu-toggle i::after{transform:translateY(5px)}
.hero{position:relative;min-height:calc(100svh - 74px);display:grid;grid-template-columns:minmax(0,.84fr) minmax(520px,1.16fr);align-items:stretch;background:var(--blue);color:var(--white);isolation:isolate;overflow:hidden}
.hero::before{position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(11,13,18,.14),transparent 52%),linear-gradient(180deg,transparent 80%,rgba(11,13,18,.2));content:""}
.hero-copy{position:relative;z-index:3;display:flex;flex-direction:column;justify-content:center;padding:clamp(56px,8vw,124px) 3vw clamp(82px,10vw,150px) clamp(24px,6vw,98px)}
.route-label{margin:0 0 24px;color:#e8edff;font-size:13px;font-weight:700;letter-spacing:.13em}.hero h1{margin:0;max-width:720px;font-family:"Smiley Sans","Microsoft YaHei",sans-serif;font-size:clamp(64px,7.2vw,112px);font-weight:400;line-height:.91;letter-spacing:-.025em;text-wrap:balance}.hero h1 span{color:var(--yellow)}
.hero-lead{max-width:38rem;margin:34px 0 0;color:#e7ebfb;font-size:clamp(16px,1.3vw,20px);line-height:1.75}.primary-action{width:max-content;min-height:52px;margin-top:34px;display:inline-flex;align-items:center;gap:30px;padding:0 20px 0 24px;background:var(--yellow);color:var(--black);font-weight:750;text-decoration:none;transition:transform .35s var(--ease),box-shadow .35s var(--ease)}.primary-action:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(11,13,18,.25)}.primary-action svg,.form-actions svg{width:22px;fill:none;stroke:currentColor;stroke-width:1.8}
.hero-media{position:relative;z-index:1;min-height:640px;margin:0;overflow:hidden}.hero-media::after{position:absolute;inset:0;background:linear-gradient(90deg,var(--blue) 0%,rgba(23,70,224,.16) 34%,transparent 65%),linear-gradient(180deg,transparent 65%,rgba(11,13,18,.34));content:""}.hero-media img{width:100%;height:100%;object-fit:cover;object-position:center}.hero-media figcaption{position:absolute;z-index:2;right:34px;bottom:30px;color:#fff;font-size:11px;letter-spacing:.14em;text-transform:uppercase}
.hero-route{position:absolute;z-index:2;left:0;bottom:4%;width:100%;height:37%;pointer-events:none}.hero-route path{fill:none;stroke-linecap:square;stroke-linejoin:round}.route-ghost{stroke:rgba(255,255,255,.24);stroke-width:3}.route-live{stroke:var(--yellow);stroke-width:4;stroke-dasharray:1;stroke-dashoffset:1;path-length:1}.hero.is-visible .route-live{animation:trace 2.2s .25s var(--ease) forwards}.hero-route circle{fill:var(--yellow);stroke:var(--black);stroke-width:3}.hero-code{position:absolute;z-index:3;left:clamp(24px,6vw,98px);bottom:20px;margin:0;color:rgba(255,255,255,.68);font-size:10px;letter-spacing:.22em}
@keyframes trace{to{stroke-dashoffset:0}}
.signal-strip{display:grid;grid-template-columns:repeat(4,1fr);background:var(--black);color:var(--white)}.signal-strip p{min-height:118px;margin:0;padding:26px clamp(18px,3vw,44px);display:flex;flex-direction:column;justify-content:center;border-right:1px solid #303542}.signal-strip p:last-child{border:0}.signal-strip strong{color:var(--gray);font-size:11px;letter-spacing:.12em}.signal-strip span{margin-top:8px;font-size:15px;font-weight:650}
.section-space{padding:clamp(88px,11vw,176px) clamp(24px,6vw,96px)}.section-heading{display:grid;grid-template-columns:1.15fr .85fr;gap:8vw;align-items:end;margin-bottom:clamp(64px,8vw,112px)}.section-heading h2,.connection-title h2,.equipment h2,.project-heading h2,.contact h2{margin:0;font-family:"Smiley Sans","Microsoft YaHei",sans-serif;font-size:clamp(50px,6.2vw,92px);font-weight:400;line-height:.98;letter-spacing:-.025em;text-wrap:balance}.section-heading p,.connection-title p,.project-heading p{max-width:42rem;margin:0;color:var(--muted);font-size:17px}
.route-map{position:relative}.route-map::before{position:absolute;left:50%;top:0;bottom:0;width:2px;background:var(--blue);content:""}.product-route{position:relative;display:grid;grid-template-columns:1fr 1.45fr;gap:clamp(28px,6vw,92px);align-items:center;padding:0 0 clamp(96px,11vw,170px)}.product-route:nth-child(even){grid-template-columns:1.45fr 1fr}.product-route:last-child{padding-bottom:0}.product-route::after{position:absolute;left:calc(50% - 9px);top:48%;width:18px;height:18px;background:var(--yellow);border:4px solid var(--blue);content:""}.route-copy{padding:clamp(8px,2vw,32px)}.route-node{display:inline-flex;min-height:30px;align-items:center;padding:0 10px;background:var(--blue);color:var(--white);font-size:10px;font-weight:800;letter-spacing:.17em}.route-copy h3{margin:22px 0 18px;font-family:"Smiley Sans","Microsoft YaHei",sans-serif;font-size:clamp(36px,4vw,62px);font-weight:400;line-height:1}.route-copy p{max-width:32rem;margin:0;color:var(--muted);font-size:16px}.route-copy a{display:inline-block;margin-top:24px;color:var(--blue);font-weight:750}
.product-route figure{position:relative;margin:0;overflow:hidden;background:#dfe3eb}.product-route figure::after{position:absolute;inset:0;border:1px solid rgba(11,13,18,.12);pointer-events:none;content:""}.product-route img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .8s var(--ease)}.product-route:hover img{transform:scale(1.025)}.product-route figcaption,.connection-figure figcaption,.equipment-media figcaption,.family-overview figcaption{position:absolute;left:16px;bottom:14px;padding:6px 9px;background:var(--black);color:var(--white);font-size:10px;letter-spacing:.08em}
.route-floor figure img{aspect-ratio:2/1}.route-door figure{max-width:620px}.route-door figure img{aspect-ratio:1}.route-instrument figure img{aspect-ratio:3/2}
.connections{display:grid;grid-template-columns:.72fr 1.28fr;background:var(--black);color:var(--white)}.connection-title{padding:clamp(74px,9vw,148px) clamp(24px,6vw,90px)}.connection-title h2{max-width:640px}.connection-title p{margin-top:30px;color:#c9cfda}.connection-figure{position:relative;min-height:600px;margin:0}.connection-figure img{width:100%;height:100%;object-fit:cover}.connection-axis{grid-column:1/-1;display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #343945}.connection-axis p{min-height:132px;margin:0;padding:28px clamp(18px,3vw,50px);display:flex;flex-direction:column;justify-content:center;border-right:1px solid #343945}.connection-axis p:last-child{border:0}.connection-axis strong{color:var(--yellow);font-family:"Smiley Sans","Microsoft YaHei",sans-serif;font-size:28px;font-weight:400}.connection-axis span{margin-top:5px;color:#c9cfda;font-size:13px}
.equipment{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(40px,8vw,128px);align-items:center;background:#e7ebf2}.equipment-copy p{max-width:40rem;margin:30px 0 0;color:var(--muted);font-size:17px}.equipment dl{margin:46px 0 0;border-top:1px solid #bfc6d2}.equipment dl div{display:grid;grid-template-columns:1fr 1.3fr;gap:28px;padding:18px 0;border-bottom:1px solid #bfc6d2}.equipment dt{color:var(--muted);font-size:13px}.equipment dd{margin:0;font-weight:700}.equipment-media{position:relative;margin:0}.equipment-media img{width:100%;aspect-ratio:1.36;object-fit:cover}
.project{position:relative;padding:clamp(88px,11vw,172px) clamp(24px,6vw,96px);background:var(--blue);color:var(--white);overflow:hidden}.project-heading{display:grid;grid-template-columns:1fr 1fr;gap:7vw;align-items:end}.project-heading p{color:#e0e7ff}.timeline{position:relative;display:grid;grid-template-columns:repeat(3,1fr);margin:80px 0 70px}.timeline::before{position:absolute;top:19px;left:0;right:0;height:3px;background:rgba(255,255,255,.28);content:""}.timeline div{position:relative;padding:54px 30px 0 0}.timeline div::before{position:absolute;top:10px;left:0;width:20px;height:20px;background:var(--yellow);border:5px solid var(--blue);outline:2px solid var(--yellow);content:""}.timeline time{display:block;font-family:"Smiley Sans","Microsoft YaHei",sans-serif;font-size:clamp(32px,4vw,58px);font-variant-numeric:tabular-nums}.timeline span{display:block;max-width:16rem;margin-top:8px;color:#e0e7ff}.timeline .timeline-open::before{background:var(--blue)}.family-overview{position:relative;margin:0}.family-overview img{width:100%;max-height:700px;object-fit:cover}
.contact{display:grid;grid-template-columns:.78fr 1.22fr;background:var(--black);color:var(--white)}.contact-copy{padding:clamp(76px,9vw,146px) clamp(24px,6vw,90px)}.contact-copy p{max-width:34rem;margin:30px 0 0;color:#c8cfdb}.location{padding-top:30px;border-top:1px solid #363b47}.location span{display:block;margin-bottom:6px;color:var(--gray);font-size:11px;letter-spacing:.12em}
.inquiry-form{display:grid;grid-template-columns:1fr 1fr;align-content:center;gap:26px;padding:clamp(76px,9vw,146px) clamp(24px,6vw,90px);background:#111620}.form-row{display:flex;flex-direction:column;gap:9px}.form-wide{grid-column:1/-1}.form-row label{color:#c8cfdb;font-size:12px;letter-spacing:.08em}.form-row input,.form-row select,.form-row textarea{width:100%;min-height:50px;padding:12px 14px;background:#1a202c;color:var(--white);border:1px solid #495264;border-radius:0;caret-color:var(--yellow);transition:border-color .2s,background .2s}.form-row textarea{min-height:126px;resize:vertical}.form-row input:hover,.form-row select:hover,.form-row textarea:hover{border-color:#8791a2}.form-row input:focus-visible,.form-row select:focus-visible,.form-row textarea:focus-visible{outline:3px solid var(--yellow);outline-offset:3px;border-color:var(--yellow);background:#202735}.form-row select option{background:var(--black)}
.form-actions{display:flex;align-items:center;gap:24px;min-height:58px}.form-actions button{min-height:52px;display:inline-flex;align-items:center;gap:32px;padding:0 22px;border:0;background:var(--yellow);color:var(--black);font-weight:800}.form-actions button:hover{background:#ffe45b}.form-status{margin:0;color:#f0f2f7;font-size:13px}.form-status.error{color:#ffcfca}
.site-footer{min-height:130px;display:grid;grid-template-columns:1fr 1fr auto;align-items:center;gap:30px;padding:28px clamp(24px,6vw,96px);background:#07080b;color:var(--white);border-top:1px solid #252a34}.site-footer p{margin:0}.site-footer p:first-child{display:flex;flex-direction:column}.site-footer span,.footer-note{color:#9ea7b5;font-size:12px}.site-footer a{min-height:44px;display:inline-flex;align-items:center}
@media(max-width:1100px){.hero{grid-template-columns:1fr 1.1fr}.hero-copy{padding-left:34px}.hero h1{font-size:clamp(58px,7vw,80px)}.signal-strip{grid-template-columns:1fr 1fr}.signal-strip p:nth-child(2){border-right:0}.signal-strip p:nth-child(-n+2){border-bottom:1px solid #303542}.connections{grid-template-columns:1fr 1fr}.equipment{grid-template-columns:1fr 1fr}.site-nav{gap:18px}.site-nav a{font-size:13px}}
@media(max-width:820px){html{scroll-padding-top:68px}.site-header{min-height:66px;padding:10px 18px}.brand img{width:40px;height:40px}.menu-toggle{display:flex}.site-nav{position:absolute;top:100%;left:0;right:0;display:none;flex-direction:column;align-items:stretch;gap:0;padding:12px 18px 20px;background:var(--white);border-bottom:1px solid var(--line);box-shadow:0 18px 34px rgba(11,13,18,.16)}.site-nav.is-open{display:flex}.site-nav a{min-height:50px;padding:0 12px;border-bottom:1px solid var(--line)}.site-nav .nav-action{margin-top:10px;justify-content:center;border:0}.hero{min-height:auto;grid-template-columns:1fr}.hero-copy{min-height:570px;padding:70px 22px 126px}.hero h1{font-size:clamp(60px,13vw,92px)}.hero-media{min-height:430px}.hero-media::after{background:linear-gradient(180deg,var(--blue),transparent 28%,rgba(11,13,18,.28))}.hero-route{bottom:31%;height:29%}.hero-code{left:22px;bottom:18px}.section-heading,.project-heading{grid-template-columns:1fr;gap:28px}.route-map::before{left:8px}.product-route,.product-route:nth-child(even){grid-template-columns:1fr;gap:26px;padding-left:30px}.product-route:nth-child(even) figure{order:2}.product-route:nth-child(even) .route-copy{order:1}.product-route::after{left:0;top:44px}.route-copy{padding:0}.connections{grid-template-columns:1fr}.connection-figure{min-height:430px}.connection-axis{grid-template-columns:1fr 1fr}.connection-axis p:nth-child(2){border-right:0}.connection-axis p:nth-child(-n+2){border-bottom:1px solid #343945}.equipment{grid-template-columns:1fr}.equipment-media{order:-1}.timeline{grid-template-columns:1fr;margin-top:50px}.timeline::before{top:0;bottom:0;left:10px;width:3px;height:auto}.timeline div{padding:0 0 46px 54px}.timeline div::before{top:10px;left:0}.contact{grid-template-columns:1fr}.inquiry-form{padding-top:10px}.site-footer{grid-template-columns:1fr auto}.footer-note{grid-column:1/-1;grid-row:2}}
@media(max-width:520px){.brand strong{font-size:14px}.brand small{display:none}.hero-copy{min-height:520px;padding-top:56px}.route-label{font-size:11px}.hero h1{font-size:clamp(54px,16vw,72px)}.hero-lead{font-size:15px}.hero-media{min-height:330px}.hero-route{bottom:29%;height:24%}.signal-strip{grid-template-columns:1fr}.signal-strip p{min-height:92px;border-right:0;border-bottom:1px solid #303542}.section-space,.project{padding-left:20px;padding-right:20px}.section-heading h2,.connection-title h2,.equipment h2,.project-heading h2,.contact h2{font-size:clamp(44px,13vw,62px)}.product-route{padding-bottom:92px}.connection-title,.contact-copy{padding-left:20px;padding-right:20px}.connection-axis{grid-template-columns:1fr}.connection-axis p{min-height:104px;border-right:0;border-bottom:1px solid #343945}.equipment dl div{grid-template-columns:1fr;gap:6px}.timeline time{font-size:40px}.inquiry-form{grid-template-columns:1fr;padding-left:20px;padding-right:20px}.form-row,.form-wide{grid-column:1}.form-actions{align-items:flex-start;flex-direction:column}.site-footer{grid-template-columns:1fr;padding-left:20px;padding-right:20px}.site-footer a{grid-row:1;grid-column:2}.footer-note{grid-column:1/-1}.family-overview img{min-height:320px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}.route-live{stroke-dashoffset:0!important}}