:root{--navy:#0d1b3d;--blue:#0b5cff;--teal:#00a19a;--ink:#1b2333;--muted:#5d6b82;--line:#e3e8f0;--bg:#f6f8fb;--ok:#2b8a3e;--warn:#d9480f;--amber:#f59f00}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:#fff;line-height:1.6;font-size:15px}
a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
button,.btn{font:inherit;cursor:pointer;border-radius:8px;border:1px solid var(--blue);background:var(--blue);color:#fff;padding:9px 16px;font-weight:600;display:inline-block}
.btn:hover,button:hover{filter:brightness(1.08);text-decoration:none}
.btn.ghost,button.ghost{background:#fff;color:var(--blue)}
.btn.sm,button.sm{padding:5px 10px;font-size:13px}
.btn.dark{background:var(--navy);border-color:var(--navy)}
input,select,textarea{font:inherit;padding:8px 10px;border:1px solid #c9d2e0;border-radius:7px;width:100%;background:#fff}
input:focus,select:focus,textarea:focus{outline:2px solid #b9cfff;border-color:var(--blue)}
label{font-size:13px;font-weight:600;color:#33415c;display:block;margin-bottom:4px}
.demo-bar{background:#fff3bf;color:#5c3c00;font-size:13px;padding:7px 0;border-bottom:1px solid #ffe066}
.demo-bar .wrap{display:flex;gap:12px;align-items:center;justify-content:space-between}
.demo-bar button{background:#5c3c00;border-color:#5c3c00;padding:3px 10px;font-size:12px}
header.site{position:sticky;top:0;z-index:40;background:#fff;border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;gap:24px;height:66px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:19px;color:var(--navy);white-space:nowrap}
.logo:hover{text-decoration:none}
.logo .ph{background:#fff3bf;border:1px dashed #f08c00;padding:0 6px;border-radius:4px}
nav.main{display:flex;gap:2px;flex:1;overflow-x:auto}
nav.main a{color:#33415c;padding:8px 11px;border-radius:7px;font-weight:500;white-space:nowrap;font-size:14.5px}
nav.main a.on,nav.main a:hover{background:#eef3ff;color:var(--blue);text-decoration:none}
.hdr-right{display:flex;gap:10px;align-items:center}
.units{display:flex;border:1px solid var(--line);border-radius:8px;overflow:hidden;font-size:12.5px}
.units button{background:#fff;color:var(--muted);border:0;border-radius:0;padding:5px 9px;font-weight:600}
.units button.on{background:var(--navy);color:#fff}
.rfq-link{position:relative;white-space:nowrap}
.rfq-link .n{position:absolute;top:-6px;right:-8px;background:var(--warn);color:#fff;border-radius:10px;font-size:11px;padding:0 6px}
.hero{background:linear-gradient(120deg,#0d1b3d 0%,#0b3aa8 60%,#00a19a 100%);color:#fff;padding:70px 0 80px}
.hero h1{font-size:44px;line-height:1.15;margin:0 0 16px;max-width:760px}
.hero p{font-size:18px;color:#d6e2ff;max-width:680px;margin:0 0 26px}
.hero .ctas{display:flex;gap:12px;flex-wrap:wrap}
.hero .btn.ghost{background:transparent;color:#fff;border-color:#fff}
.proof{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:44px}
.proof div{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:12px;padding:14px}
.proof b{display:block;font-size:22px}
.proof span{font-size:13px;color:#cfe0ff}
section.blk{padding:56px 0}
section.blk.alt{background:var(--bg)}
h2.t{font-size:30px;margin:0 0 8px;color:var(--navy)}
p.sub{color:var(--muted);margin:0 0 28px;max-width:760px}
.grid{display:grid;gap:18px}.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
.card{border:1px solid var(--line);border-radius:14px;padding:20px;background:#fff}
.card h3{margin:0 0 8px;font-size:18px;color:var(--navy)}
.card.link{transition:box-shadow .2s,transform .2s;color:inherit;display:block}
.card.link:hover{box-shadow:0 8px 28px rgba(13,27,61,.12);transform:translateY(-2px);text-decoration:none}
.icon{width:42px;height:42px;border-radius:10px;background:#eef3ff;color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:10px}
.page-head{background:var(--bg);border-bottom:1px solid var(--line);padding:34px 0 26px}
.page-head h1{margin:0 0 6px;font-size:32px;color:var(--navy)}
.page-head p{margin:0;color:var(--muted)}
.crumb{font-size:13px;color:var(--muted);margin-bottom:6px}
.layout{display:grid;grid-template-columns:250px 1fr;gap:28px;padding:30px 0 60px}
.filters{position:sticky;top:86px;align-self:start}
.filters h4{margin:16px 0 6px;font-size:13px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted)}
.filters label.ck{display:flex;gap:7px;align-items:center;font-weight:400;font-size:14px;margin:4px 0;cursor:pointer}
.filters input[type=checkbox]{width:auto}
.plist{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:16px}
.pcard{border:1px solid var(--line);border-radius:14px;padding:16px;display:flex;flex-direction:column;gap:8px;background:#fff}
.pcard .img,.pimg{background:linear-gradient(135deg,#eef2f8,#dfe6f1);border-radius:10px;height:150px;display:flex;align-items:center;justify-content:center;color:#8a96ab;font-size:12px}
.pcard h3{font-size:15.5px;margin:0;line-height:1.35}
.pcard h3 a{color:var(--ink)}
.specs-mini{display:flex;flex-wrap:wrap;gap:5px}
.chip{background:#f1f3f5;border-radius:6px;padding:1px 7px;font-size:12px;color:#495057;white-space:nowrap}
.chip.blue{background:#e7f0ff;color:#0b4bd6}.chip.green{background:#e6fcf5;color:#087f5b}.chip.amber{background:#fff4e6;color:#d9480f}.chip.red{background:#fff0f0;color:#c92a2a}.chip.grey{background:#f1f3f5;color:#868e96}
.price{font-size:22px;font-weight:800;color:var(--navy)}
.price small{font-size:12px;font-weight:500;color:var(--muted)}
.pcard .acts{display:flex;gap:8px;margin-top:auto}
.stock{font-size:13px}.stock.in{color:var(--ok)}.stock.out{color:var(--warn)}
table.spec,table.data{width:100%;border-collapse:collapse;font-size:14px}
table.spec th,table.spec td,table.data th,table.data td{border-bottom:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
table.spec th{width:42%;color:var(--muted);font-weight:500}
table.data th{background:var(--bg);font-weight:600;font-size:13px;color:#33415c;position:sticky;top:0}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px}
.pd{display:grid;grid-template-columns:1fr 1fr;gap:36px;padding:30px 0 50px}
.pd .pimg{height:340px}
.tiers{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:12px 0}
.tiers div{padding:10px;text-align:center;border-right:1px solid var(--line)}
.tiers div:last-child{border-right:0}
.tiers b{display:block;font-size:18px}
.tiers span{font-size:12px;color:var(--muted)}
.qty{display:flex;gap:8px;align-items:center;margin:12px 0}
.qty input{width:90px}
.note{font-size:12.5px;color:var(--muted)}
.alert{border-radius:10px;padding:12px 14px;font-size:14px;margin:12px 0}
.alert.info{background:#e7f0ff;color:#1c3d8f}.alert.warn{background:#fff4e6;color:#8a3a00}.alert.ok{background:#e6fcf5;color:#0b6e4f}.alert.err{background:#fff0f0;color:#a61e1e}
/* sizing */
.sz{display:grid;grid-template-columns:420px 1fr;gap:28px;padding:30px 0 60px}
.steps{display:flex;gap:6px;margin-bottom:14px;flex-wrap:wrap}
.mech{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:16px}
.mech button{background:#fff;color:var(--ink);border:1px solid var(--line);padding:10px 4px;font-size:12.5px;font-weight:600;display:flex;flex-direction:column;align-items:center;gap:4px}
.mech button .e{font-size:22px}
.mech button.on{border-color:var(--blue);background:#eef3ff;color:var(--blue)}
.fgrid{display:grid;grid-template-columns:1fr 1fr;gap:10px 12px}
.fgrid .full{grid-column:1/-1}
.u{font-weight:400;color:var(--muted)}
fieldset{border:1px solid var(--line);border-radius:12px;padding:12px 14px 14px;margin:0 0 14px}
legend{font-weight:700;color:var(--navy);padding:0 6px;font-size:14px}
.req-box{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-bottom:18px}
.req-box div{background:var(--bg);border-radius:10px;padding:10px 12px}
.req-box b{display:block;font-size:17px;color:var(--navy)}
.req-box span{font-size:12px;color:var(--muted)}
.res{border:1px solid var(--line);border-radius:14px;padding:16px;margin-bottom:12px;display:grid;grid-template-columns:1fr 260px;gap:16px}
.res.best{border:2px solid var(--blue);box-shadow:0 6px 22px rgba(11,92,255,.12)}
.meter{margin:5px 0}
.meter .lb{display:flex;justify-content:space-between;font-size:12.5px}
.meter .bar{height:7px;background:#edf0f5;border-radius:4px;overflow:hidden}
.meter .bar i{display:block;height:100%;border-radius:4px}
.badge{display:inline-block;font-size:12px;font-weight:700;border-radius:6px;padding:2px 8px}
.badge.rec{background:#e6fcf5;color:#087f5b}.badge.use{background:#fff4e6;color:#d9480f}.badge.no{background:#fff0f0;color:#c92a2a}
details.calc{margin-top:14px;font-size:13.5px}
details.calc summary{cursor:pointer;font-weight:600;color:var(--blue)}
details.calc pre{background:var(--bg);padding:12px;border-radius:8px;overflow-x:auto;font-size:12.5px;line-height:1.55}
.profile{width:100%;height:120px}
/* rfq */
.cart-row{display:grid;grid-template-columns:1fr 110px 110px 40px;gap:10px;align-items:center;border-bottom:1px solid var(--line);padding:10px 0}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 14px}
.form-grid .full{grid-column:1/-1}
.radio-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.radio-cards label{border:1px solid var(--line);border-radius:10px;padding:10px;font-weight:500;display:flex;gap:8px;cursor:pointer}
.radio-cards input{width:auto}
.radio-cards label:has(input:checked){border-color:var(--blue);background:#eef3ff}
footer.site{background:var(--navy);color:#b8c7ea;padding:44px 0 26px;font-size:14px}
footer.site a{color:#dfe7fb}
footer.site .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:24px}
footer.site h4{color:#fff;margin:0 0 10px;font-size:14px}
footer.site ul{list-style:none;padding:0;margin:0}footer.site li{margin:5px 0}
footer.site .legal{border-top:1px solid rgba(255,255,255,.15);margin-top:26px;padding-top:16px;font-size:12.5px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
/* internal review drawer (Chinese) */
.review-btn{position:fixed;right:18px;bottom:18px;z-index:60;background:#5c3c00;border-color:#5c3c00;box-shadow:0 6px 18px rgba(0,0,0,.25)}
.review{position:fixed;right:0;top:0;bottom:0;width:420px;max-width:92vw;background:#fffdf3;border-left:3px solid #f08c00;z-index:70;padding:20px 22px;overflow:auto;transform:translateX(105%);transition:transform .25s;font-size:14px;box-shadow:-10px 0 30px rgba(0,0,0,.15)}
.review.open{transform:none}
.review h3{margin:0 0 10px;color:#5c3c00}
.review h4{margin:16px 0 4px;color:#5c3c00}
.review ul{padding-left:18px;margin:4px 0}
.review .x{position:absolute;right:14px;top:12px;background:none;border:0;color:#5c3c00;font-size:20px}
.empty{padding:40px;text-align:center;color:var(--muted);border:1px dashed var(--line);border-radius:12px}
@media(max-width:960px){
 .proof,.g3,.g4{grid-template-columns:1fr 1fr}.g2,.pd,.sz,.layout{grid-template-columns:1fr}
 .filters{position:static}.hero h1{font-size:32px}.req-box{grid-template-columns:1fr 1fr}.res{grid-template-columns:1fr}
 footer.site .cols{grid-template-columns:1fr 1fr}nav.main{display:none}nav.main.open{display:flex;position:absolute;top:66px;left:0;right:0;background:#fff;flex-direction:column;padding:10px;border-bottom:1px solid var(--line)}
 .menu-btn{display:inline-block!important}
}
.menu-btn{display:none;background:#fff;color:var(--navy);border-color:var(--line)}
@media print{header.site,.demo-bar,.review-btn,footer.site{display:none}}