*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#f5f7fa;--panel:#fff;--ink:#1a2230;--muted:#69748a;--line:#dde3ec;
  --blue:#0b57a4;--blue-d:#08447f;--cyan:#00a3b4;--dark:#0e1726
}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);
  font:16px/1.75 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC","Segoe UI",sans-serif;
  -webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}

.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
h1,h2,h3{font-weight:600;line-height:1.35}

/* topbar */
.top{background:var(--dark);color:#9fb0c8;font-size:13px}
.top__in{display:flex;justify-content:space-between;gap:16px;padding:8px 0;flex-wrap:wrap}
.top a{text-decoration:none}

/* header */
.hdr{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.hdr__in{display:flex;align-items:center;gap:26px;height:76px}
.logo{display:flex;align-items:center;gap:12px;text-decoration:none}
.logo__m{width:40px;height:40px;border-radius:7px;background:linear-gradient(135deg,var(--blue),var(--cyan));display:grid;place-items:center;color:#fff;font-weight:700;font-size:17px;letter-spacing:-.04em;flex:0 0 auto}
.logo__t{display:flex;flex-direction:column;line-height:1.2}
.logo__t b{font-size:19px;font-weight:600}
.logo__t em{font-style:normal;font-size:11px;color:var(--muted);margin-top:2px;letter-spacing:.04em}
.nav{display:flex;gap:26px;margin-left:auto}
.nav a{text-decoration:none;font-size:15px;color:var(--muted);transition:.15s}
.nav a:hover{color:var(--blue)}
.tel{text-decoration:none;font-size:15px;font-weight:600;white-space:nowrap}
.btn{display:inline-block;padding:12px 22px;border-radius:4px;background:var(--blue);color:#fff;text-decoration:none;font-size:15px;border:1px solid var(--blue);transition:.15s;text-align:center}
.btn:hover{background:var(--blue-d);border-color:var(--blue-d)}
.btn--ghost{background:none;color:var(--blue)}
.btn--ghost:hover{background:#e8f1fa}
.btn--full{display:block;width:100%}

/* hero */
.hero{background:linear-gradient(160deg,#0e1726 0%,#14304f 60%,#0b3f5c 100%);color:#fff;padding:72px 0}
.hero__in{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.kick{color:#5fd4e4;font-size:13px;letter-spacing:.2em;margin-bottom:16px}
.hero h1{font-size:clamp(30px,4.2vw,46px);margin-bottom:18px;letter-spacing:.01em}
.hero .lead{font-size:17px;color:#b9c8dc;max-width:46ch;line-height:1.9}
.hero__btns{display:flex;gap:12px;margin:28px 0 34px;flex-wrap:wrap}
.hero .btn--ghost{color:#fff;border-color:rgba(255,255,255,.4)}
.hero .btn--ghost:hover{background:rgba(255,255,255,.1)}
.kpi{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:18px;border-top:1px solid rgba(255,255,255,.18);padding-top:22px}
.kpi b{display:block;font-size:26px;font-weight:600;color:#5fd4e4}
.kpi span{font-size:13px;color:#9fb0c8}
.hero__ph img{border-radius:10px;width:100%;aspect-ratio:4/3.2;object-fit:cover;box-shadow:0 18px 44px rgba(0,0,0,.35)}

/* sections */
.sec{padding:72px 0;scroll-margin-top:98px}
.sec--panel{background:var(--panel)}
.sec--dark{background:var(--dark);color:#fff}
.sec--dark .cap{color:#9fb0c8}
.sec h2{font-size:clamp(25px,3.2vw,34px);margin-bottom:10px}
.sec h2 i{font-style:normal;color:var(--muted);font-size:.5em;font-weight:400;margin-left:12px;letter-spacing:.06em}
.sec--dark h2 i{color:#7f91ab}
.cap{color:var(--muted);max-width:62ch;margin-bottom:30px}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:start}

/* product filter */
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:26px}
.chip{padding:9px 18px;border:1px solid var(--line);border-radius:4px;font-size:14px;color:var(--muted);background:var(--panel);transition:.15s}
.chip:hover{border-color:var(--blue);color:var(--blue)}
.chip.on{background:var(--blue);border-color:var(--blue);color:#fff}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(258px,1fr));gap:22px}
.prod{background:var(--panel);border:1px solid var(--line);border-radius:8px;overflow:hidden;display:flex;flex-direction:column;transition:.2s}
.prod:hover{border-color:var(--blue);box-shadow:0 8px 22px rgba(11,87,164,.1)}
.prod__ph{cursor:zoom-in;overflow:hidden;background:#eef2f7}
.prod__ph img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .4s}
.prod__ph:hover img{transform:scale(1.05)}
.prod__b{padding:16px 17px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.prod h3{font-size:17px}
.sku{font-size:12px;color:var(--muted);letter-spacing:.06em}
.prod p{font-size:14px;color:var(--muted);flex:1;line-height:1.7}
.prod__f{display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid var(--line);padding-top:12px}
.from{font-size:13px;color:var(--muted)}
.from b{display:block;font-size:19px;color:var(--ink);font-weight:600}
.mini{padding:8px 14px;border:1px solid var(--blue);border-radius:4px;color:var(--blue);font-size:13px;transition:.15s}
.mini:hover{background:var(--blue);color:#fff}

/* quote tool */
.tool{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:26px}
.sec--dark .tool{background:#16233a;border-color:#27374f}
.tool label{display:block;font-size:14px;color:var(--muted);margin-bottom:16px}
.sec--dark .tool label{color:#9fb0c8}
.tool select,.tool input{display:block;width:100%;margin-top:7px;padding:12px 14px;border:1px solid var(--line);border-radius:4px;background:var(--bg);color:var(--ink)}
.sec--dark .tool select,.sec--dark .tool input{background:#0e1726;border-color:#27374f;color:#fff}
.tool select:focus,.tool input:focus{outline:2px solid var(--blue);outline-offset:-1px}
.tiers{width:100%;border-collapse:collapse;font-size:14px;margin:6px 0 20px}
.tiers th,.tiers td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:left}
.sec--dark .tiers th,.sec--dark .tiers td{border-bottom-color:#27374f}
.tiers th{font-weight:500;color:var(--muted);font-size:13px}
.sec--dark .tiers th{color:#7f91ab}
.tiers td:last-child,.tiers th:last-child{text-align:right}
.tiers tr.on td{background:rgba(11,87,164,.09);color:var(--blue);font-weight:600}
.sec--dark .tiers tr.on td{background:rgba(95,212,228,.12);color:#5fd4e4}
.quote{border:1px solid var(--blue);border-radius:6px;padding:20px 22px;background:#f2f8fd}
.sec--dark .quote{background:#0e1726;border-color:var(--cyan)}
.quote.bad{border-color:#c4623a;background:#fdf4f0}
.sec--dark .quote.bad{background:#231a16;border-color:#c4623a}
.quote h4{font-size:17px;margin-bottom:10px}
.quote .sum{font-size:32px;font-weight:600;color:var(--blue);margin:2px 0 6px}
.sec--dark .quote .sum{color:#5fd4e4}
.quote dl{display:grid;grid-template-columns:auto 1fr;gap:4px 16px;font-size:14px;margin-top:12px}
.quote dt{color:var(--muted)}
.sec--dark .quote dt{color:#7f91ab}
.quote dd{text-align:right}

/* lists */
.tick{list-style:none}
.tick li{padding:11px 0 11px 26px;border-bottom:1px solid var(--line);position:relative;font-size:15px}
.tick li::before{content:"";position:absolute;left:2px;top:19px;width:8px;height:8px;background:var(--cyan)}
.sec--dark .tick li{border-bottom-color:#27374f}
.tbl{width:100%;border-collapse:collapse;font-size:15px}
.tbl th,.tbl td{padding:12px 0;border-bottom:1px solid var(--line);text-align:left}
.tbl th{font-weight:500;width:42%}
.tbl td{text-align:right;color:var(--muted)}
.gal{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.gal img{border-radius:6px;aspect-ratio:4/3;object-fit:cover;width:100%;cursor:zoom-in}
.certs{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}
.cert{border:1px solid var(--line);border-radius:4px;padding:9px 16px;font-size:13px;color:var(--muted);background:var(--panel)}
.sec--dark .cert{background:#16233a;border-color:#27374f;color:#9fb0c8}

/* form */
.narrow{max-width:720px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
form label.f{display:block;font-size:14px;color:var(--muted);margin-bottom:16px}
form label.f input,form label.f select,form label.f textarea{display:block;width:100%;margin-top:6px;padding:12px 14px;border:1px solid var(--line);border-radius:4px;background:var(--panel);color:var(--ink)}
form label.f input:focus,form label.f select:focus,form label.f textarea:focus{outline:2px solid var(--blue);outline-offset:-1px}
textarea{resize:vertical}
.fine{font-size:13px;color:var(--muted);margin-top:14px}
.ok{margin-top:22px;background:#eaf4fc;border:1px solid var(--blue);border-radius:6px;padding:20px 22px;font-size:15px}

/* contact */
.big{font-size:19px;font-weight:600;line-height:1.7;margin-bottom:16px}
.sec p+p{margin-top:12px}
iframe{width:100%;height:330px;border:1px solid var(--line);border-radius:6px}
.legal{font-size:13px;color:var(--muted);line-height:1.9;border-top:1px solid var(--line);padding-top:16px;margin-top:18px}

/* footer */
.ftr{background:var(--dark);color:#7f91ab;font-size:13px;padding:26px 0;line-height:1.9}
.ftr__in{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}

/* lightbox */
.lb{position:fixed;inset:0;z-index:100;background:rgba(10,14,22,.94);display:none;align-items:center;justify-content:center;flex-direction:column;gap:14px;padding:40px 20px}
.lb.on{display:flex}
.lb img{max-width:min(800px,92vw);max-height:78vh;border-radius:6px}
.lb__cap{color:#fff;font-size:15px}
.lb__x{position:absolute;top:16px;right:20px;font-size:28px;color:#fff;line-height:1;padding:6px 10px}

@media (max-width:920px){
  .hero__in,.cols{grid-template-columns:1fr;gap:34px}
  .nav{display:none}
  .hdr__in{height:64px;gap:14px}
  .tel{margin-left:auto}
  .hero{padding:48px 0}
  .sec{padding:52px 0}
  .row{grid-template-columns:1fr}
  .kpi{grid-template-columns:1fr;gap:12px}
}
@media (max-width:520px){
  .wrap{padding:0 16px}
  .tel{display:none}
  .top__in{font-size:12px}
}