:root{
  --bg:#0a1120; --bg2:#0d1729; --panel:#122036; --panel2:#16263f; --line:#22334f;
  --txt:#eaf1fa; --muted:#9fb2c9; --muted2:#74889f;
  --acc:#25c3d6; --acc2:#2f6bff; --acc-glow:rgba(37,195,214,.35);
  --gold:#d7a94a;
  --radius:14px; --radius-s:9px;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans); color:var(--txt); background:var(--bg);
  background-image:
    radial-gradient(1200px 600px at 80% -10%, rgba(47,107,255,.10), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(37,195,214,.08), transparent 60%);
  background-attachment:fixed;
  line-height:1.6; -webkit-font-smoothing:antialiased; font-size:16px;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
::selection{background:var(--acc);color:#05202a}
.wrap{max-width:1180px;margin:0 auto;padding:0 22px}

/* page switching */
.page{display:none}
.page.show{display:block}

/* ---------- top bar ---------- */
.topbar{background:linear-gradient(90deg,#0b1220,#0e1b2f);border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:38px;gap:14px}
.topbar b{color:var(--txt);font-weight:600}
.topbar .tb-right{display:flex;gap:18px;align-items:center}
.topbar .dot{color:var(--acc)}

/* ---------- header ---------- */
header{position:sticky;top:0;z-index:50;background:linear-gradient(180deg,rgba(10,17,32,.97),rgba(10,17,32,.92));border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:18px;height:70px}
.brand{display:flex;align-items:center;gap:13px;min-width:0}
.brand .logo{width:46px;height:46px;border-radius:12px;flex:none;background:linear-gradient(140deg,var(--acc2),var(--acc));display:grid;place-items:center;color:#fff;font-weight:800;font-size:20px;box-shadow:0 6px 18px var(--acc-glow)}
.brand .logo-img{height:42px;width:auto;display:block}
.brand .name{line-height:1.12}
.brand .name .t{font-weight:800;letter-spacing:.5px;font-size:17px;white-space:nowrap}
.brand .name .s{font-size:11.5px;color:var(--muted);white-space:nowrap}
.menu{display:flex;gap:4px;margin-left:auto;align-items:center}
.menu a{padding:9px 13px;border-radius:9px;font-size:14.5px;color:var(--muted);font-weight:500;transition:.18s;position:relative;white-space:nowrap}
.menu a:hover{color:var(--txt);background:rgba(255,255,255,.05)}
.menu a.active{color:#06313c;background:linear-gradient(135deg,var(--acc),#1fb0c4);font-weight:700;box-shadow:0 4px 14px var(--acc-glow)}
.langbox{display:flex;border:1px solid var(--line);border-radius:9px;overflow:hidden;margin-left:8px}
.langbox button{background:transparent;border:0;color:var(--muted);padding:7px 11px;font-size:12.5px;font-weight:700;cursor:pointer;transition:.15s}
.langbox button.on{background:var(--acc);color:#05202a}
.btn{display:inline-flex;align-items:center;gap:9px;padding:12px 22px;border-radius:10px;font-weight:700;font-size:14.5px;cursor:pointer;border:0;transition:.18s;color:#04222b}
.btn.primary{background:linear-gradient(135deg,var(--acc),#1ba9c0);box-shadow:0 8px 22px var(--acc-glow)}
.btn.primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px var(--acc-glow)}
.btn.ghost{background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--txt)}
.btn.ghost:hover{border-color:var(--acc);color:var(--acc)}
.burger{display:none;height:44px;width:44px;background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:9px;color:var(--txt);cursor:pointer;font-size:20px;margin-left:auto}
.langbox.m-inline{display:none}

@media(max-width:980px){
  .menu{position:fixed;top:70px;left:0;right:0;bottom:0;flex-direction:column;align-items:stretch;background:var(--bg);padding:18px 20px 30px;gap:4px;transform:translateX(105%);transition:.25s;z-index:60;box-shadow:0 24px 60px rgba(0,0,0,.55);border-top:1px solid var(--line);overflow-y:auto}
  .menu.open{transform:none}
  .menu a{font-size:16px;padding:14px 16px;color:var(--txt);border-radius:9px}
  .menu a:hover{color:var(--txt);background:rgba(255,255,255,.06)}
  .menu a.active{color:#06313c}
  .burger{display:block}
  .langbox.m-inline{display:flex;margin-left:0;margin-top:14px;padding:14px 0}
  .brand .logo-img{height:32px}
}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);min-height:600px;display:flex;align-items:center}
.hero .bgimg{position:absolute;inset:0;background-size:cover;background-position:center 60%;opacity:.5}
.hero .bgimg::after{content:'';position:absolute;inset:0;background:linear-gradient(100deg,rgba(8,14,28,.92) 10%,rgba(8,14,28,.45) 50%,rgba(8,14,28,.25))}
.hero .wrap{position:relative;z-index:2;padding:70px 22px}
.hero .kicker{display:inline-flex;align-items:center;gap:9px;border:1px solid var(--line);background:rgba(255,255,255,.04);padding:7px 15px;border-radius:999px;font-size:13px;color:var(--acc);font-weight:600;letter-spacing:.3px;margin-bottom:22px}
.hero h1{font-size:clamp(30px,5vw,54px);line-height:1.08;font-weight:800;letter-spacing:-.5px;max-width:820px}
.hero h1 span{background:linear-gradient(90deg,var(--acc),#7ad0ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:clamp(16px,1.4vw,19px);color:var(--muted);max-width:620px;margin-top:18px}
.hero .cta{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.hero .stats{display:flex;gap:34px;margin-top:40px;flex-wrap:wrap}
.stat .n{font-size:29px;font-weight:800;color:var(--txt)}
.stat .n b{color:var(--acc)}
.stat .l{font-size:13px;color:var(--muted)}

/* ---------- sections ---------- */
section{padding:70px 0}
.shead{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:34px;flex-wrap:wrap}
.kick{font-size:12.5px;font-weight:700;letter-spacing:2.5px;text-transform:uppercase;color:var(--acc);margin-bottom:10px}
h2.sec{font-size:clamp(24px,3.2vw,36px);font-weight:800;letter-spacing:-.4px;line-height:1.15}
.lead{color:var(--muted);max-width:640px;font-size:16.5px}
.grid{display:grid;gap:18px}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
@media(max-width:900px){.g3{grid-template-columns:1fr 1fr}.g4{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.g3,.g4,.g2{grid-template-columns:1fr}}

.card{background:linear-gradient(180deg,var(--panel),var(--bg2));border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.2s;position:relative}
.card:hover{border-color:var(--acc);transform:translateY(-4px);box-shadow:0 16px 40px rgba(0,0,0,.35)}
.card .ic{width:52px;height:52px;border-radius:12px;background:rgba(37,195,214,.12);display:grid;place-items:center;color:var(--acc);margin-bottom:16px}
.card h3{font-size:17.5px;font-weight:700;margin-bottom:9px}
.card p{color:var(--muted);font-size:14.5px}
.card .ic svg{width:26px;height:26px}

/* stats strip */
.strip{background:linear-gradient(90deg,var(--panel),var(--panel2));border:1px solid var(--line);border-radius:var(--radius);padding:26px 30px;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media(max-width:800px){.strip{grid-template-columns:1fr 1fr}}
.strip .n{font-size:28px;font-weight:800;color:var(--acc)}
.strip .l{font-size:13px;color:var(--muted)}

/* catalog */
.cat-nav{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:26px}
.cat-nav button{border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--muted);padding:9px 16px;border-radius:999px;font-size:13.5px;font-weight:600;cursor:pointer;transition:.15s}
.cat-nav button:hover{color:var(--txt);border-color:var(--acc)}
.cat-nav button.on{background:var(--acc);color:#05202a;border-color:var(--acc)}
.cat-section{margin-bottom:34px}
.cat-head{display:flex;align-items:center;gap:14px;margin:34px 0 18px}
.cat-head .num{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--acc2),var(--acc));display:grid;place-items:center;font-weight:800;color:#fff;font-size:15px;flex:none}
.cat-head h3{font-size:22px;font-weight:800}
.cat-head .en{color:var(--muted2);font-weight:600;font-size:13px;margin-top:2px}
.subhead{margin:26px 0 12px;font-size:15px;font-weight:700;color:var(--txt);display:flex;align-items:center;gap:9px}
.subhead::before{content:'';width:8px;height:8px;border-radius:2px;background:var(--acc)}
.chips{display:flex;flex-wrap:wrap;gap:11px}
.chip{background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:10px 18px;font-size:14px;color:var(--txt);transition:.15s;font-weight:500}
.chip:hover{border-color:var(--acc);color:var(--acc);transform:translateY(-2px)}
.notes{background:rgba(37,195,214,.07);border:1px solid rgba(37,195,214,.25);border-radius:var(--radius-s);padding:16px 20px;margin:14px 0;color:var(--txt);font-size:14.5px;border-left:3px solid var(--acc)}
.notes b{color:var(--acc)}

/* about */
.feat-list{display:grid;gap:12px;margin-top:6px}
.feat{display:flex;gap:13px;align-items:flex-start}
.feat .chk{width:24px;height:24px;flex:none;border-radius:7px;background:rgba(37,195,214,.14);color:var(--acc);display:grid;place-items:center;margin-top:2px}
.feat .chk svg{width:13px;height:13px}
.feat p{color:var(--muted);font-size:15px}
.pub{margin-bottom:12px;padding:16px 18px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-s);display:flex;gap:14px}
.pub .n{flex:none;width:32px;height:32px;border-radius:8px;background:rgba(37,195,214,.14);color:var(--acc);display:grid;place-items:center;font-weight:800;font-size:14px}
.pub .t{font-size:14.8px} .pub .m{font-size:12.5px;color:var(--muted2);margin-top:3px}
.pat-list{display:grid;gap:12px}
.pat{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-s);padding:16px 18px}
.pat .code{color:var(--acc);font-weight:800;font-size:15px}
.pat .desc{color:var(--muted);font-size:14px;margin-top:2px}

/* production */
.prod-banner{position:relative;overflow:hidden;border-radius:var(--radius);border:1px solid var(--line);min-height:320px;display:flex;align-items:flex-end;background-size:cover;background-position:center;margin-bottom:26px}
.prod-banner::after{content:'';position:absolute;inset:0;background:linear-gradient(0deg,rgba(7,12,24,.9),rgba(7,12,24,.25))}
.prod-banner .txt{position:relative;z-index:2;padding:30px 32px;max-width:600px}
.prod-banner h3{font-size:26px;font-weight:800;margin-bottom:8px}
.prod-banner p{color:var(--muted)}

/* services */
.svc{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--panel)}
.svc .hd{display:flex;align-items:center;gap:14px;padding:18px 22px;border-bottom:1px solid var(--line)}
.svc .hd .num{width:40px;height:40px;border-radius:10px;background:rgba(37,195,214,.13);color:var(--acc);display:grid;place-items:center;font-weight:800}
.svc .hd h3{font-size:17px;font-weight:700}
.svc .bd{padding:16px 22px;color:var(--muted);font-size:14.4px}
.svc .bd ul{margin:10px 0 0 18px} .svc .bd li{margin:5px 0}

/* materials */
.mlist{display:grid;gap:14px}
.mat{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-s);padding:18px 22px;display:flex;gap:16px;align-items:center;transition:.15s}
.mat:hover{border-color:var(--acc)}
.mat .code{flex:none;background:rgba(215,169,74,.14);color:var(--gold);font-weight:700;font-size:13px;padding:6px 12px;border-radius:7px;white-space:nowrap}
.mat .t{font-size:15px} .mat .m{color:var(--muted2);font-size:13px}

/* contact */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:26px}
@media(max-width:860px){.contact-grid{grid-template-columns:1fr}}
.cbox{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.cbox h3{font-size:18px;font-weight:700;margin-bottom:18px}
.crow{display:flex;gap:14px;align-items:flex-start;padding:12px 0;border-bottom:1px solid var(--line)}
.crow:last-child{border-bottom:0}
.crow .ic{width:42px;height:42px;flex:none;border-radius:10px;background:rgba(37,195,214,.12);display:grid;place-items:center;color:var(--acc)}
.crow .ic svg{width:21px;height:21px}
.crow .k{font-size:12px;color:var(--muted2);text-transform:uppercase;letter-spacing:1px}
.crow .v{font-size:15.5px;font-weight:600;color:var(--txt)}
.crow .v a:hover{color:var(--acc)}
.map{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;position:relative;min-height:300px;background:#0d1729}
.map svg{width:100%;height:100%;display:block}
.map .mlabel{position:absolute;bottom:16px;left:16px;background:rgba(10,17,32,.9);backdrop-filter:blur(6px);border:1px solid var(--line);border-radius:10px;padding:12px 16px;font-size:13px;display:flex;gap:10px;align-items:center;max-width:290px}
.map .mlabel b{color:var(--acc)}

/* footer */
footer{background:#081020;border-top:1px solid var(--line);padding:50px 0 26px;margin-top:20px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
@media(max-width:820px){.foot-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.foot-grid{grid-template-columns:1fr}}
footer h4{font-size:13px;letter-spacing:1.5px;text-transform:uppercase;color:var(--muted2);margin-bottom:14px}
footer ul{list-style:none} footer li{margin:8px 0}
footer li a{color:var(--muted);font-size:14px} footer li a:hover{color:var(--acc)}
footer .brand-row{display:flex;gap:12px;align-items:center;margin-bottom:16px}
footer .brand-row .logo{width:44px;height:44px;border-radius:11px;background:linear-gradient(140deg,var(--acc2),var(--acc));display:grid;place-items:center;color:#fff;font-weight:800;font-size:19px}
.fcopy{border-top:1px solid var(--line);margin-top:34px;padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:var(--muted2);font-size:13px}
.fcopy a{color:var(--muted)}
.fcopy a:hover{color:var(--acc)}

/* page head banner */
.pagehead{padding:56px 0 30px;border-bottom:1px solid var(--line)}
.pagehead .kick{margin-bottom:8px}
.pagehead h1{font-size:clamp(28px,4vw,44px);font-weight:800;letter-spacing:-.5px}
.pagehead p{color:var(--muted);max-width:700px;margin-top:12px;font-size:16.5px}
.crumb{font-size:13px;color:var(--muted2);margin-bottom:14px}
.crumb a:hover{color:var(--acc)}

/* modal / toast */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--panel2);border:1px solid var(--acc);color:var(--txt);padding:14px 22px;border-radius:10px;font-size:14.5px;opacity:0;transition:.3s;z-index:100;box-shadow:0 10px 30px rgba(0,0,0,.4)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* reveal */
.rv{opacity:0;transform:translateY(22px);transition:.6s cubic-bezier(.2,.7,.3,1)}
.rv.in{opacity:1;transform:none}

.two{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center}
@media(max-width:860px){.two{grid-template-columns:1fr}}
.figure{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);position:relative}
.figure img{width:100%;height:100%;object-fit:cover}
.figure .cap{position:absolute;bottom:14px;left:14px;background:rgba(10,17,32,.85);border:1px solid var(--line);border-radius:9px;padding:8px 14px;font-size:13px;color:var(--muted)}
.badge{display:inline-block;background:rgba(37,195,214,.14);color:var(--acc);font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px;margin-bottom:14px;letter-spacing:.5px}