:root{
  --bg:#f5f7fa;--surface:#ffffff;--ink:#14213d;--muted:#5b6478;--line:#e3e7ee;
  --brand:#0b57d0;--brand-dark:#0842a0;--brand-soft:#e8f0fe;--accent:#ff7a1a;
  --ok:#1a8a4f;--ok-soft:#e6f5ec;--warn:#b5620a;--warn-soft:#fff3e0;
  --radius:10px;--shadow:0 1px 2px rgba(20,33,61,.06),0 4px 16px rgba(20,33,61,.06);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);font-size:15px;line-height:1.5;color:var(--ink);background:var(--bg)}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img,svg{max-width:100%}
h1,h2,h3,h4{line-height:1.2;margin:0 0 .5em;font-weight:700}
h1{font-size:34px}h2{font-size:26px}h3{font-size:19px}h4{font-size:16px}
p{margin:0 0 1em}
.container{max-width:1240px;margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}
.small{font-size:13px}
.mt0{margin-top:0}.mt8{margin-top:8px}.mt16{margin-top:16px}.mt24{margin-top:24px}.mt40{margin-top:40px}
.row{display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:960px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.grid-4,.grid-3,.grid-2{grid-template-columns:1fr}h1{font-size:26px}h2{font-size:22px}}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:8px;border:1px solid transparent;font:inherit;font-weight:600;cursor:pointer;white-space:nowrap;transition:.15s}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{filter:brightness(.93)}
.btn-outline{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand)}
.btn-ghost{background:transparent;color:var(--brand)}
.btn-sm{padding:7px 12px;font-size:13px}
.btn-block{width:100%}
.btn[disabled]{opacity:.5;cursor:default}

/* header */
.topbar{background:#0f1a33;color:#c9d3e6;font-size:13px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:34px;gap:16px}
.topbar a{color:#c9d3e6}
.header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.header .container{display:flex;align-items:center;gap:24px;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--ink);letter-spacing:-.3px}
.logo:hover{text-decoration:none}
.logo .mark{width:34px;height:34px;border-radius:8px;background:var(--brand);display:grid;place-items:center;color:#fff;font-size:16px}
.search{flex:1;display:flex;max-width:520px}
.search input{flex:1;padding:10px 14px;border:1px solid var(--line);border-right:0;border-radius:8px 0 0 8px;font:inherit}
.search button{border-radius:0 8px 8px 0}
.header-actions{display:flex;gap:10px;align-items:center;margin-left:auto}
.rfq-btn .badge{background:var(--accent);color:#fff;border-radius:20px;padding:1px 7px;font-size:12px}
.nav{background:#fff;border-bottom:1px solid var(--line)}
.nav .container{display:flex;gap:4px;height:46px;align-items:center;overflow-x:auto}
.nav a{color:var(--ink);padding:8px 12px;border-radius:6px;white-space:nowrap;font-weight:500}
.nav a:hover,.nav a.active{background:var(--brand-soft);color:var(--brand);text-decoration:none}
.nav a.cat-all{font-weight:700}
.phone{font-weight:700;color:var(--ink);font-size:16px}
@media(max-width:860px){.search{display:none}.header .container{height:60px}}

/* hero */
.hero{background:linear-gradient(135deg,#0f1a33 0%,#0b3d8f 60%,#0b57d0 100%);color:#fff;padding:56px 0}
.hero h1{font-size:40px;margin-bottom:12px}
.hero p{font-size:18px;color:#d5e1ff;max-width:640px}
.hero .row{margin-top:24px}
.hero .stats{display:flex;gap:32px;margin-top:36px;flex-wrap:wrap}
.hero .stat b{display:block;font-size:26px}
.hero .stat span{color:#b9c9ee;font-size:13px}
@media(max-width:600px){.hero h1{font-size:28px}.hero{padding:36px 0}}

/* sections */
.section{padding:44px 0}
.section-head{display:flex;justify-content:space-between;align-items:baseline;gap:16px;margin-bottom:20px}
.section-head h2{margin:0}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.cat-card{display:flex;flex-direction:column;gap:8px;color:var(--ink);transition:.15s}
.cat-card:hover{text-decoration:none;border-color:var(--brand);transform:translateY(-2px)}
.cat-card .icon{width:44px;height:44px;border-radius:10px;background:var(--brand-soft);display:grid;place-items:center;color:var(--brand)}
.cat-card h3{margin:6px 0 0;font-size:16px}
.cat-card .cnt{color:var(--muted);font-size:13px}
.feature{display:flex;gap:14px;align-items:flex-start}
.feature .icon{flex:none;width:40px;height:40px;border-radius:10px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-weight:800}
.feature h4{margin:0 0 4px}
.feature p{margin:0;color:var(--muted);font-size:14px}
.band{background:#0f1a33;color:#fff;padding:40px 0}
.band h2{color:#fff}
.band p{color:#c9d3e6}

/* product card */
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);display:flex;flex-direction:column;overflow:hidden;transition:.15s;position:relative}
.pcard:hover{box-shadow:var(--shadow);border-color:#c7d2e6}
.pcard .pic{height:170px;background:#eef2f8;display:grid;place-items:center;color:#7a8aa8}
.pcard .pic svg{width:120px;height:120px}
.pcard .body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:8px;flex:1}
.pcard .name{font-weight:600;color:var(--ink);font-size:15px;line-height:1.3}
.pcard .name:hover{color:var(--brand);text-decoration:none}
.pcard .specs{list-style:none;padding:0;margin:0;font-size:13px;color:var(--muted);display:flex;flex-direction:column;gap:2px}
.pcard .specs li b{color:var(--ink);font-weight:500}
.pcard .price{font-size:19px;font-weight:800;margin-top:auto}
.pcard .price small{font-size:12px;color:var(--muted);font-weight:400;display:block}
.pcard .actions{display:flex;gap:8px;margin-top:8px}
.pcard .actions .btn{flex:1}
.tags{position:absolute;top:10px;left:10px;display:flex;gap:6px;flex-wrap:wrap}
.tag{font-size:11px;font-weight:700;padding:3px 8px;border-radius:6px;background:#fff;border:1px solid var(--line);color:var(--muted)}
.tag-ok{background:var(--ok-soft);color:var(--ok);border-color:transparent}
.tag-warn{background:var(--warn-soft);color:var(--warn);border-color:transparent}
.tag-hit{background:var(--accent);color:#fff;border-color:transparent}
.tag-brand{background:var(--brand-soft);color:var(--brand);border-color:transparent}
.avail{font-size:13px;font-weight:600}
.avail.ok{color:var(--ok)}.avail.order{color:var(--warn)}

/* catalog layout */
.catalog{display:grid;grid-template-columns:260px 1fr;gap:28px;align-items:start}
@media(max-width:900px){.catalog{grid-template-columns:1fr}}
.filters{position:sticky;top:84px}
.filters .card{padding:16px}
.fgroup{border-bottom:1px solid var(--line);padding:12px 0}
.fgroup:last-child{border-bottom:0}
.fgroup h4{margin:0 0 8px;font-size:13px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted)}
.fgroup label{display:flex;gap:8px;align-items:center;font-size:14px;padding:3px 0;cursor:pointer}
.fgroup label span.c{margin-left:auto;color:var(--muted);font-size:12px}
.fgroup input[type=number]{width:100%;padding:7px 9px;border:1px solid var(--line);border-radius:6px;font:inherit}
.toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.toolbar select{padding:8px 10px;border:1px solid var(--line);border-radius:6px;font:inherit;background:#fff}
.pgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:1100px){.pgrid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.pgrid{grid-template-columns:1fr}}
.subcats{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.subcats a{padding:7px 12px;border:1px solid var(--line);border-radius:20px;background:#fff;color:var(--ink);font-size:14px}
.subcats a.active,.subcats a:hover{border-color:var(--brand);color:var(--brand);text-decoration:none}
.crumbs{font-size:13px;color:var(--muted);margin:16px 0}
.crumbs a{color:var(--muted)}
.empty{padding:40px;text-align:center;color:var(--muted)}

/* product page */
.product{display:grid;grid-template-columns:1.1fr 1fr;gap:36px;align-items:start}
@media(max-width:900px){.product{grid-template-columns:1fr}}
.product .pic{background:#eef2f8;border-radius:var(--radius);height:380px;display:grid;place-items:center;color:#7a8aa8}
.product .pic svg{width:260px;height:260px}
.buybox{position:sticky;top:84px}
.buybox .price{font-size:32px;font-weight:800}
.buybox .price small{font-size:13px;font-weight:400;color:var(--muted);display:block}
.spec-table{width:100%;border-collapse:collapse;font-size:14px}
.spec-table th,.spec-table td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.spec-table th{color:var(--muted);font-weight:500;width:38%}
.spec-table tr:nth-child(even){background:#fafbfd}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:16px}
.tabs button{background:none;border:0;padding:10px 14px;font:inherit;font-weight:600;color:var(--muted);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px}
.tabs button.active{color:var(--brand);border-color:var(--brand)}
.tab-pane{display:none}.tab-pane.active{display:block}
.qty{display:inline-flex;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.qty button{width:36px;border:0;background:#fff;font-size:18px;cursor:pointer}
.qty input{width:48px;text-align:center;border:0;border-left:1px solid var(--line);border-right:1px solid var(--line);font:inherit}
.note{background:var(--warn-soft);border-left:3px solid var(--warn);padding:10px 14px;border-radius:6px;font-size:13px}
.note-info{background:var(--brand-soft);border-left-color:var(--brand)}

/* rfq */
.rfq-table{width:100%;border-collapse:collapse}
.rfq-table th,.rfq-table td{padding:12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
.rfq-table th{font-size:13px;color:var(--muted);font-weight:500}
.rfq-table .sum{text-align:right;white-space:nowrap;font-weight:600}
.form{display:grid;gap:14px}
.form label{display:flex;flex-direction:column;gap:6px;font-size:14px;font-weight:500}
.form input,.form textarea,.form select{padding:10px 12px;border:1px solid var(--line);border-radius:8px;font:inherit;width:100%}
.form textarea{min-height:100px;resize:vertical}
.form .chk{flex-direction:row;align-items:flex-start;font-weight:400;font-size:13px;color:var(--muted)}
.form .chk input{width:auto;margin-top:3px}

/* configurator */
.cfg{display:grid;grid-template-columns:1fr 360px;gap:28px;align-items:start}
@media(max-width:960px){.cfg{grid-template-columns:1fr}}
.cfg-step{margin-bottom:22px}
.cfg-step h3{display:flex;align-items:center;gap:10px}
.cfg-step h3 .n{width:28px;height:28px;border-radius:50%;background:var(--brand);color:#fff;font-size:14px;display:grid;place-items:center}
.opts{display:grid;gap:10px;grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}
.opt{border:1px solid var(--line);border-radius:8px;padding:12px;cursor:pointer;background:#fff;position:relative;display:block}
.opt:hover{border-color:#b7c6e6}
.opt input{position:absolute;opacity:0}
.opt.sel{border-color:var(--brand);background:var(--brand-soft)}
.opt .t{font-weight:600;font-size:14px}
.opt .d{font-size:12px;color:var(--muted);margin-top:2px}
.opt .p{font-size:13px;font-weight:600;margin-top:6px}
.summary{position:sticky;top:84px}
.summary .line{display:flex;justify-content:space-between;gap:12px;font-size:13px;padding:5px 0;border-bottom:1px dashed var(--line)}
.summary .total{font-size:26px;font-weight:800;margin:14px 0 4px}
.warnbox{background:var(--warn-soft);color:var(--warn);padding:8px 12px;border-radius:6px;font-size:13px;margin-top:8px}

/* footer */
.footer{background:#0f1a33;color:#aab6cf;padding:44px 0 24px;margin-top:60px;font-size:14px}
.footer a{color:#dbe4f5}
.footer h4{color:#fff;margin-bottom:12px}
.footer ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:6px}
.footer .bottom{border-top:1px solid #24304d;margin-top:32px;padding-top:18px;font-size:12px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer .logo{color:#fff}

/* misc */
.toast{position:fixed;bottom:24px;right:24px;background:var(--ink);color:#fff;padding:12px 18px;border-radius:8px;box-shadow:var(--shadow);opacity:0;transform:translateY(10px);transition:.2s;z-index:100}
.toast.show{opacity:1;transform:none}
.faq details{border-bottom:1px solid var(--line);padding:12px 0}
.faq summary{font-weight:600;cursor:pointer}
.faq p{margin:8px 0 0;color:var(--muted)}
.prose{max-width:820px}
.prose h2{margin-top:32px}
.prose table{width:100%;border-collapse:collapse;font-size:14px;margin:12px 0 20px}
.prose th,.prose td{border:1px solid var(--line);padding:8px 10px;text-align:left}
.prose th{background:#f0f3f8}
.steps{counter-reset:s;display:grid;gap:14px}
.step{display:flex;gap:14px}
.step::before{counter-increment:s;content:counter(s);flex:none;width:32px;height:32px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:700}
.compare-bar{position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--line);padding:10px 0;display:none;z-index:60}
.compare-bar.show{display:block}