:root{--blue:#1689e8;--blue-d:#0c5fb0;--ink:#0d1620;--ink2:#16222f;--txt:#2a3440;--mut:#6b7785;--line:#e3e8ee;--bg2:#f3f5f8;
--f:"Inter","Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{font-family:var(--f);color:var(--txt);background:#fff;line-height:1.65;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
picture{display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:1240px;margin:0 auto;padding:0 28px}
.eyebrow{font-size:12px;letter-spacing:.22em;font-weight:600;color:#8cc8ff;text-transform:uppercase;margin-bottom:14px}
.eyebrow.dark{color:var(--blue)}
h1,h2,h3{color:var(--ink);line-height:1.2;font-weight:700;letter-spacing:-.01em}
.btn{display:inline-block;background:var(--blue);color:#fff;padding:14px 28px;font-weight:600;font-size:15px;border:0;cursor:pointer;transition:.2s;border-radius:2px}
.btn:hover{background:var(--blue-d)}
.btn.ghost{background:transparent;border:1px solid rgba(255,255,255,.5)}
.btn.ghost:hover{background:rgba(255,255,255,.1)}
/* nav */
.nav{position:fixed;inset:0 0 auto;z-index:50;transition:.25s}
.nav-in{display:flex;align-items:center;height:72px;gap:28px}
.brand img{height:38px;width:auto}
.logo-c{display:none}.nav.solid .logo-c,.nav.open .logo-c{display:block}.nav.solid .logo-w,.nav.open .logo-w{display:none}
.links{margin-left:auto;display:flex;gap:30px;align-items:center}
.links a{color:#fff;font-size:15px;opacity:.9}
.links a:hover{opacity:1}
.btn-sm{border:1px solid rgba(255,255,255,.6);padding:7px 18px;border-radius:2px}
.nav.solid{background:rgba(255,255,255,.96);backdrop-filter:blur(8px);box-shadow:0 1px 0 var(--line)}
.nav.solid .links a{color:var(--ink)}
.nav.solid .btn-sm{background:var(--blue);border-color:var(--blue);color:#fff!important}
.lang{background:none;border:1px solid rgba(255,255,255,.4);color:#fff;font:600 13px var(--f);padding:6px 12px;cursor:pointer;border-radius:2px}
.lang i{opacity:.4;margin:0 4px;font-style:normal}
.lang span{opacity:.5}
html[data-lang=zh] .lang .zh,html[data-lang=en] .lang .en{opacity:1}
.nav.solid .lang{color:var(--ink);border-color:var(--line)}
.burger{display:none;background:none;border:0;width:34px;height:34px;cursor:pointer}
.burger span{display:block;height:2px;background:#fff;margin:7px 4px}
.nav.solid .burger span,.nav.open .burger span{background:var(--ink)}
/* hero */
.hero{position:relative;min-height:min(100vh,920px);display:flex;flex-direction:column;justify-content:flex-end;color:#fff;overflow:hidden;background:var(--ink)}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:60% 40%;transform:scale(1.04);animation:zoom 14s ease-out forwards}
@keyframes zoom{to{transform:scale(1)}}
.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(8,16,26,.88) 0%,rgba(8,16,26,.6) 45%,rgba(8,16,26,.15) 100%),linear-gradient(0deg,rgba(8,16,26,.85) 0%,transparent 40%)}
.hero-in{position:relative;padding-top:140px;padding-bottom:60px;max-width:1240px;width:100%}
.hero h1{color:#fff;font-size:clamp(36px,5.4vw,68px);max-width:14em;margin-bottom:22px}
html[data-lang=en] .hero h1{font-size:clamp(32px,4.6vw,58px)}
.lead{font-size:clamp(16px,1.4vw,19px);max-width:38em;opacity:.85;margin-bottom:34px}
.cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-foot{position:relative;display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid rgba(255,255,255,.18);padding-top:26px;padding-bottom:36px;width:100%}
.hero-foot div{padding-right:20px}
.hero-foot b{display:block;font-size:34px;font-weight:700;color:#fff;line-height:1.1}
.hero-foot small{font-size:16px;margin-left:2px;color:#8cc8ff}
.hero-foot span{font-size:13px;opacity:.7}
/* sections */
.sec{padding:110px 0}
.sec.gray{background:var(--bg2)}
.sec.dark{background:var(--ink);color:#c5ced8}
.sec.dark h2,.sec.dark h3{color:#fff}
.sec-head{max-width:720px;margin-bottom:56px}
.sec-head h2,.about h2,.contact h2{font-size:clamp(28px,3.2vw,42px);margin-bottom:14px}
.sub{color:var(--mut);font-size:17px}
.sub.light{color:#9fb0c2}
/* products */
.prod-feature{display:grid;grid-template-columns:1.25fr 1fr;gap:0;background:var(--bg2);margin-bottom:28px}
.prod-feature img{width:100%;height:100%;object-fit:cover;min-height:420px}
.pf-text{padding:52px 48px;display:flex;flex-direction:column;justify-content:center}
.tag{font-size:12px;font-weight:600;color:var(--blue);letter-spacing:.08em;margin-bottom:12px}
.pf-text h3{font-size:28px;margin-bottom:16px}
.pf-text p{margin-bottom:20px}
.pf-text ul{list-style:none}
.pf-text li{padding:10px 0 10px 22px;border-top:1px solid var(--line);position:relative;font-size:15px}
.pf-text li:before{content:"";position:absolute;left:0;top:19px;width:10px;height:2px;background:var(--blue)}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:#fff;border:1px solid var(--line);transition:.25s;overflow:hidden}
.card:hover{transform:translateY(-4px);box-shadow:0 18px 40px -20px rgba(13,22,32,.35);border-color:transparent}
.card img{aspect-ratio:4/3;object-fit:cover;width:100%;transition:.5s}
.card:hover img{transform:scale(1.04)}
.card-b{padding:22px 22px 26px;border-top:3px solid var(--blue)}
.card h3{font-size:18px;margin-bottom:8px}
.card p{font-size:14px;color:var(--mut)}
/* advantages */
.adv{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.adv-img img{width:100%;aspect-ratio:4/5;object-fit:cover}
.adv-i{display:flex;gap:26px;padding:28px 0;border-bottom:1px solid rgba(255,255,255,.1)}
.adv-i:first-child{padding-top:0}
.adv-i em{font-style:normal;font-size:14px;font-weight:700;color:var(--blue);padding-top:4px;min-width:26px}
.adv-i h3{font-size:21px;margin-bottom:8px}
/* applications */
.apps{display:grid;grid-template-columns:1.4fr 1fr 1fr;grid-template-rows:260px 260px;gap:16px}
.app{position:relative;overflow:hidden;background:var(--bg2)}
.app.big{grid-row:span 2}
.app img{width:100%;height:100%;object-fit:cover;transition:.6s}
.app picture{height:100%}
.app:hover img{transform:scale(1.05)}
.app figcaption{position:absolute;left:0;right:0;bottom:0;padding:40px 20px 18px;background:linear-gradient(0deg,rgba(8,16,26,.8),transparent);color:#fff}
.app b{display:block;font-size:18px}
.app span{font-size:13px;opacity:.8}
.apps .app:nth-child(n+2){}
.more{margin-top:26px;color:var(--mut);font-size:15px}
/* about */
.about{display:grid;grid-template-columns:1fr 1.15fr;gap:64px;align-items:center}
.about-text p{margin-bottom:16px}
.sig{margin-top:28px;padding-left:16px;border-left:3px solid var(--blue);font-weight:600;color:var(--ink)}
.sig small{font-weight:400;color:var(--mut)}
.gallery{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:220px 220px;gap:12px}
.gallery img{width:100%;height:100%;object-fit:cover}
.gallery picture{height:100%;overflow:hidden}
/* certs */
.certs{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.certs figure{background:var(--bg2);padding:26px;text-align:center}
.certs img{aspect-ratio:4/3;object-fit:contain;width:100%;mix-blend-mode:multiply}
.certs figcaption{margin-top:14px;font-weight:600;color:var(--ink)}
/* contact */
.contact-in{display:grid;grid-template-columns:1fr 1.1fr;gap:64px}
.cinfo{list-style:none;margin-top:34px}
.cinfo li{display:flex;justify-content:space-between;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.1)}
.cinfo b{color:#ffcf6b;font-weight:500}
.form{background:var(--ink2);padding:36px;display:flex;flex-direction:column;gap:16px}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form label span{display:block;font-size:13px;margin-bottom:6px;color:#9fb0c2}
.form input,.form textarea{width:100%;background:#0d1620;border:1px solid #2b3a4a;color:#fff;padding:12px 14px;font:15px var(--f);border-radius:2px}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--blue)}
.form .btn{align-self:flex-start}
.note{font-size:13px;color:#ffcf6b;transition:.3s}
.note.flash{color:#fff;background:#b8860b;padding:6px 10px}
/* footer */
.foot{background:#080f17;color:#8a98a8;padding:40px 0;font-size:14px}
.foot-in{display:flex;align-items:center;gap:28px;flex-wrap:wrap}
.flogo{height:34px;width:auto}
.foot-in>p{margin-left:auto}
.muted{color:#5f6e7e}
.foot p:first-child{color:#d0d8e0}
/* reveal */
.rv{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.rv.in{opacity:1;transform:none}
/* responsive */
@media(max-width:1000px){
 .grid4{grid-template-columns:repeat(2,1fr)}
 .prod-feature,.adv,.about,.contact-in{grid-template-columns:1fr}
 .prod-feature img{min-height:280px}
 .adv{gap:40px}.adv-img img{aspect-ratio:16/10}
 .hero-foot{grid-template-columns:repeat(2,1fr);row-gap:20px}
}
@media(max-width:760px){
 .hero-in{padding-top:110px}
 .wrap{padding:0 20px}
 .links{position:fixed;top:72px;left:0;right:0;background:#fff;flex-direction:column;align-items:flex-start;padding:20px;gap:18px;display:none;box-shadow:0 10px 30px rgba(0,0,0,.1)}
 .nav.open{background:#fff}.nav.open .links{display:flex}.links a{color:var(--ink)!important}
 .burger{display:block}.lang{margin-left:auto}
 .nav.open .lang{color:var(--ink);border-color:var(--line)}
 .sec{padding:72px 0}
 .grid4{grid-template-columns:1fr}
 .apps{grid-template-columns:1fr 1fr;grid-template-rows:auto}
 .app.big{grid-column:span 2;grid-row:auto;height:280px}.app{height:190px}
 .certs{grid-template-columns:1fr}
 .pf-text{padding:32px 24px}
 .form .row{grid-template-columns:1fr}
 .gallery{grid-template-rows:150px 150px}
 .foot-in>p{margin-left:0}
}