:root{
  --ink:#0B0E12; --ink2:#12171E; --ink3:#1C232D; --steel:#38424F;
  --copper:#C0763A; --copper2:#E09A5C; --copper-dim:rgba(192,118,58,.14);
  --paper:#F7F6F4; --line:#DFD9D1; --text:#14181D;
  --muted:#6A6F77;
  --max:1180px;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--paper);color:var(--text);font-family:var(--sans);
  line-height:1.6;-webkit-text-size-adjust:100%;font-size:16px;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
@media(max-width:640px){.wrap{padding:0 18px}}

/* top bar */
.topbar{background:var(--ink);color:#9AA3AE;font-size:12.5px;letter-spacing:.3px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;min-height:38px;gap:16px}
.topbar b{color:var(--copper2);font-weight:600}
.topbar .r{display:flex;gap:18px;align-items:center}
.topbar a{text-decoration:none;color:#C9D0D8}
.topbar a:hover{color:#fff}
@media(max-width:720px){.topbar .l span{display:none}}

/* header */
header{position:sticky;top:0;z-index:60;background:rgba(11,14,18,.94);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.08);
  transition:box-shadow .25s}
header.scrolled{box-shadow:0 8px 30px rgba(0,0,0,.35)}
header .wrap{display:grid;grid-template-columns:auto 1fr auto;align-items:center;height:68px;gap:20px}
header .wrap nav{justify-self:center}
header .btn-ghost{justify-self:end}
.logo{display:flex;align-items:center;gap:11px;text-decoration:none;color:#fff}
.logo .mark{width:34px;height:34px;border:1.5px solid var(--copper);border-radius:7px;
  display:grid;place-items:center;font-size:11.5px;font-weight:800;color:var(--copper2);letter-spacing:.5px}
.logo .txt b{display:block;font-size:15px;letter-spacing:2.4px;line-height:1.1}
.logo .txt span{display:block;font-size:9.5px;letter-spacing:1.6px;color:#8C949E;text-transform:uppercase}
nav.main{display:flex;gap:24px}
nav.main a{color:#C3CAD2;text-decoration:none;font-size:13.5px;letter-spacing:.3px;position:relative;padding:4px 0}
nav.main a:hover{color:#fff}
nav.main a:after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:1.5px;background:var(--copper);transition:width .25s}
nav.main a:hover:after{width:100%}
.btn{display:inline-block;text-decoration:none;font-weight:600;border-radius:5px;transition:transform .15s,background .2s}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--copper);color:#fff;padding:11px 24px;font-size:13.5px;letter-spacing:.4px}
.btn-primary:hover{background:var(--copper2)}
.btn-ghost{border:1px solid rgba(255,255,255,.28);color:#fff;padding:11px 22px;font-size:13.5px}
.btn-ghost:hover{background:rgba(255,255,255,.08)}
.burger{display:none;background:none;border:1px solid rgba(255,255,255,.25);border-radius:5px;
  width:40px;height:36px;color:#fff;font-size:16px;cursor:pointer}
@media(max-width:940px){
  header .wrap{display:flex;justify-content:space-between}
  nav.main{display:none;position:fixed;top:106px;left:0;right:0;background:var(--ink2);
    flex-direction:column;gap:0;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.1);z-index:59}
  nav.main.open{display:flex}
  nav.main a{padding:14px 24px;border-bottom:1px solid rgba(255,255,255,.06)}
  .burger{display:block}
  header .btn-primary{display:none}
}

/* hero */
.hero{background:radial-gradient(120% 140% at 75% 10%,#1E2833 0%,#0B0E12 55%,#07090C 100%);
  color:#fff;position:relative;overflow:hidden;border-bottom:1px solid rgba(255,255,255,.07)}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;
  padding-top:44px;padding-bottom:52px}
.eyebrow{font-size:11px;letter-spacing:2.6px;text-transform:uppercase;color:var(--copper2);font-weight:700;margin-bottom:16px}
.hero h1{font-size:clamp(30px,4.1vw,50px);line-height:1.1;margin:0 0 20px;font-weight:700;letter-spacing:-1.4px}
.hero h1 em{font-style:normal;color:var(--copper2)}
.hero p.lead{color:#AEB6C0;font-size:16px;max-width:480px;margin:0 0 30px}
.hero .actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:34px}
/* catalogue plate: product shot + factory thumbs, so white-background
   photography reads as intentional technical documentation, not a pasted box */
.hero-plate{margin:0;background:linear-gradient(180deg,#FBFAF8 0%,#EDE7DE 100%);
  border:1px solid rgba(255,255,255,.16);border-radius:12px;padding:13px 13px 13px;
  box-shadow:0 36px 90px rgba(0,0,0,.55),0 2px 0 rgba(255,255,255,.06) inset;
  display:flex;flex-direction:column;gap:11px;align-self:stretch}
.plate-main{background:#fff;border-radius:6px;overflow:hidden;flex:1;display:flex;align-items:center;justify-content:center}
.plate-main img{width:100%;height:auto;object-fit:contain;max-height:300px}
.plate-cap{display:flex;justify-content:space-between;align-items:baseline;gap:12px;
  font-size:12px;color:#4A3C2E;letter-spacing:.2px;padding:0 3px;font-variant-numeric:tabular-nums}
.plate-cap b{color:#2B2118;font-size:12.5px;letter-spacing:1.1px}
.plate-thumbs{display:grid;grid-template-columns:repeat(3,1fr);gap:7px}
.plate-thumbs img{width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;border-radius:4px;opacity:.93;
  border:1px solid rgba(0,0,0,.08)}
@media(max-width:900px){
  .plate-main img{max-height:210px}
  .hero h1{font-size:27px;letter-spacing:-.9px}
  .hero p.lead{font-size:14.5px;margin-bottom:22px}
  .hero .actions{margin-bottom:24px;gap:8px}
  .kpi b{font-size:17px}
  .kpi div{padding:12px 10px}
}
@media(max-width:560px){ .plate-thumbs{grid-template-columns:repeat(3,1fr);gap:5px} }
.kpi{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.1);border-radius:6px;overflow:hidden}
.kpi div{background:rgba(255,255,255,.03);padding:16px 14px}
.kpi b{display:block;font-size:20px;color:#fff;line-height:1.2;font-variant-numeric:tabular-nums}
.kpi span{font-size:10.5px;letter-spacing:1.1px;text-transform:uppercase;color:#8A93A0}
@media(max-width:900px){
  .hero .wrap{grid-template-columns:1fr;padding-top:34px;padding-bottom:40px;gap:28px}
  .hero-plate{order:-1;padding:10px}
  .plate-cap{font-size:10.5px}
  .kpi{grid-template-columns:1fr 1fr}
}

/* sections */
section{padding:78px 0;border-bottom:1px solid var(--line)}
@media(max-width:640px){section{padding:52px 0}}
.sec-head{max-width:720px;margin-bottom:40px}
.sec-head h2{font-size:clamp(23px,2.6vw,34px);line-height:1.18;margin:0 0 12px;letter-spacing:-.9px;font-weight:700}
.sec-head p{color:var(--muted);margin:0;font-size:15.5px}
.dark{background:var(--ink);color:#fff;border-bottom:1px solid rgba(255,255,255,.08)}
.dark .sec-head p{color:#98A1AC}

/* product grid */
.grid-products{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:960px){.grid-products{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.grid-products{grid-template-columns:1fr}}
.pcard{background:#fff;border:1px solid var(--line);border-radius:9px;overflow:hidden;
  transition:transform .22s,box-shadow .22s,border-color .22s;text-decoration:none;display:block}
.pcard:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(20,24,29,.13);border-color:#CBBFAE}
.pcard .ph{background:#EDEAE4;aspect-ratio:4/3;overflow:hidden}
.pcard .ph img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.pcard:hover .ph img{transform:scale(1.045)}
.pcard .bd{padding:18px 20px 20px}
.pcard h3{margin:0 0 3px;font-size:18px;letter-spacing:-.3px}
.pcard .cap{font-size:12px;color:var(--copper);font-weight:700;letter-spacing:.5px;text-transform:uppercase;margin-bottom:10px}
.pcard dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:3px 12px;font-size:13px}
.pcard dt{color:var(--muted)}
.pcard dd{margin:0;text-align:right;font-weight:600;font-variant-numeric:tabular-nums}
.pcard .more{margin-top:13px;font-size:12.5px;color:var(--ink3);font-weight:700;letter-spacing:.4px}

/* spec table */
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid rgba(255,255,255,.12);border-radius:9px;background:#0E1218}
table.spec{border-collapse:collapse;width:100%;min-width:920px;font-size:13px}
table.spec th,table.spec td{padding:12px 14px;text-align:left;border-bottom:1px solid rgba(255,255,255,.08);white-space:nowrap;font-variant-numeric:tabular-nums;color:#D5DBE2}
table.spec thead th{background:#080A0E;color:#8A93A0;font-weight:600;font-size:11px;letter-spacing:.9px;text-transform:uppercase}
table.spec tbody th{position:sticky;left:0;background:#12171E;color:#fff;font-weight:700;z-index:2;border-right:1px solid rgba(255,255,255,.1)}
table.spec tbody tr:nth-child(even) td{background:#0F141A}
table.spec tbody tr:hover td{background:#1A212A}
table.spec tbody tr:hover th{background:#1A212A}
table.spec .hl{color:var(--copper2);font-weight:700}
.tbl-note{font-size:12.5px;color:#8A93A0;margin-top:16px;line-height:1.75}

/* calculator */
.calcgrid{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}
@media(max-width:860px){.calcgrid{grid-template-columns:1fr}}
.calc{background:#fff;border:1px solid var(--line);border-radius:10px;padding:24px}
.frow{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:15px}
.frow label{font-size:13.5px;color:var(--steel)}
.frow input,.frow select{width:132px;padding:9px 11px;border:1px solid var(--line);border-radius:5px;
  font-size:14.5px;text-align:right;background:#FBFAF8;font-family:inherit;font-variant-numeric:tabular-nums;color:var(--text)}
.frow input:focus,.frow select:focus{outline:2px solid var(--copper2);outline-offset:1px;border-color:var(--copper)}
.result{background:var(--ink2);color:#fff;border-radius:8px;padding:20px;margin-top:6px}
.result .k{font-size:10.5px;letter-spacing:1.6px;text-transform:uppercase;color:#8A93A0}
.result .big{font-size:clamp(28px,4vw,38px);font-weight:800;color:var(--copper2);line-height:1.15;font-variant-numeric:tabular-nums;margin:4px 0 14px}
.result .rgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;padding-top:14px;border-top:1px solid rgba(255,255,255,.14)}
.result .rgrid span{font-size:10.5px;color:#8A93A0;display:block;letter-spacing:.5px}
.result .rgrid b{font-size:15.5px;color:#fff;font-variant-numeric:tabular-nums}
@media(max-width:520px){.result .rgrid{grid-template-columns:1fr}}

/* tabs */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:26px}
.tab{background:transparent;border:1px solid rgba(255,255,255,.2);color:#AEB6C0;padding:9px 18px;
  border-radius:999px;font-size:13px;cursor:pointer;font-family:inherit;transition:.2s}
.tab:hover{border-color:rgba(255,255,255,.45);color:#fff}
.tab.on{background:var(--copper);border-color:var(--copper);color:#fff}
.panel{display:none;grid-template-columns:1.1fr 1fr;gap:36px;align-items:center}
.panel.on{display:grid}
@media(max-width:820px){.panel.on{grid-template-columns:1fr;gap:24px}}
.panel img{border-radius:8px;width:100%}
.panel h3{margin:0 0 12px;font-size:20px;letter-spacing:-.4px;color:#fff}
.panel ul{margin:0;padding-left:18px;color:#AEB6C0;font-size:14.5px}
.panel li{margin-bottom:9px}
.panel li b{color:#fff;font-weight:600}

/* gallery */
.gal{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
@media(max-width:820px){.gal{grid-template-columns:1fr 1fr}}
.gal figure{margin:0;cursor:zoom-in;position:relative;overflow:hidden;border-radius:7px;background:#E7E3DC}
.gal img{width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;transition:transform .4s}
.gal figure:hover img{transform:scale(1.05)}
.gal figcaption{position:absolute;left:0;right:0;bottom:0;padding:22px 12px 9px;font-size:11.5px;color:#fff;
  background:linear-gradient(transparent,rgba(0,0,0,.72));letter-spacing:.3px}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px;padding-top:34px;border-top:1px solid var(--line)}
@media(max-width:640px){.stats{grid-template-columns:1fr;gap:18px}}
.stats b{display:block;font-size:clamp(26px,3.4vw,34px);letter-spacing:-1px;color:var(--ink);line-height:1.1}
.stats span{font-size:13px;color:var(--muted)}

/* generic cards */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:900px){.grid3{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.grid3{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:9px;padding:22px}
.card h3{margin:0 0 7px;font-size:15.5px;letter-spacing:-.2px}
.card p{margin:0;font-size:13.5px;color:var(--muted)}
.card .n{font-size:11px;letter-spacing:1.6px;color:var(--copper);font-weight:800;display:block;margin-bottom:9px}
.dark .card{background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.1)}
.dark .card h3{color:#fff}
.dark .card p{color:#98A1AC}

/* warning */
.warn{background:#fff;border:1px solid var(--line);border-left:3px solid var(--copper);border-radius:7px;padding:22px 24px}
.warn h3{margin:0 0 10px;font-size:15px}
.warn ol{margin:0;padding-left:20px;font-size:14px;color:#3A4149}
.warn li{margin-bottom:10px}
.warn li b{color:var(--ink)}

/* faq */
details{background:#fff;border:1px solid var(--line);border-radius:7px;margin-bottom:10px;overflow:hidden}
details summary{cursor:pointer;padding:16px 44px 16px 20px;font-weight:600;font-size:14.5px;list-style:none;position:relative}
details summary::-webkit-details-marker{display:none}
details summary:after{content:"+";position:absolute;right:20px;top:13px;font-size:19px;color:var(--copper);font-weight:400}
details[open] summary:after{content:"−"}
details .ans{padding:0 20px 18px;font-size:14px;color:#4A5058;line-height:1.75}

/* contact */
.contact{background:radial-gradient(120% 130% at 20% 0%,#1E2833,#0B0E12 60%);color:#fff;border:0}
.cgrid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:start}
@media(max-width:860px){.cgrid{grid-template-columns:1fr;gap:30px}}
.contact h2{font-size:clamp(24px,3vw,34px);letter-spacing:-.8px;margin:0 0 12px;line-height:1.18}
.contact p{color:#A2AAB4;font-size:15px;margin:0 0 22px}
.steps{list-style:none;padding:0;margin:0 0 26px}
.steps li{display:flex;gap:12px;margin-bottom:12px;font-size:14px;color:#C3CAD2}
.steps i{flex:0 0 22px;height:22px;border-radius:50%;background:var(--copper-dim);color:var(--copper2);
  font-style:normal;font-size:11.5px;font-weight:800;display:grid;place-items:center}
.qrcard{display:flex;gap:16px;align-items:center;background:rgba(255,255,255,.055);
  border:1px solid rgba(255,255,255,.12);border-radius:10px;padding:16px;max-width:440px}
.qrcard img{border-radius:6px;flex:0 0 156px;width:156px;height:156px;background:#fff;padding:9px}
.qrcard b{display:block;color:#fff;font-size:14.5px;margin-bottom:4px}
.qrcard span{display:block;color:#98A1AC;font-size:12.5px;line-height:1.55;margin-bottom:6px}
.qrcard a{color:#E09A5C;font-size:12.5px;font-weight:700;text-decoration:none}
.qrcard a.mobwa{display:none;color:#fff;margin-top:10px;padding:12px 20px;font-size:13.5px;text-align:center}
.mob-only{display:none}
.nextstep{margin:16px 0 0;font-size:12.5px;color:#8A93A0;line-height:1.65;max-width:440px}
.nextstep b{display:block;color:#C3CAD2;font-size:11px;letter-spacing:1.4px;text-transform:uppercase;margin-bottom:5px}
@media(max-width:640px){
  .qrcard{flex-direction:column;text-align:center;gap:10px;align-items:stretch}
  .qrcard img{display:none}
  .qrcard .desk-only{display:none}
  .qrcard .mob-only{display:block}
  .qrcard a.mobwa{display:block}
  .contact{padding-bottom:88px}   /* 给悬浮 WhatsApp 按钮留出安全距离 */
}
form.rfq{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:10px;padding:24px}
form.rfq .f{margin-bottom:13px}
form.rfq label{display:block;font-size:11.5px;letter-spacing:1px;text-transform:uppercase;color:#8A93A0;margin-bottom:6px}
form.rfq input,form.rfq select,form.rfq textarea{width:100%;padding:11px 13px;border-radius:5px;border:1px solid rgba(255,255,255,.16);
  background:rgba(0,0,0,.25);color:#fff;font-family:inherit;font-size:14px}
form.rfq input:focus,form.rfq select:focus,form.rfq textarea:focus{outline:2px solid var(--copper);outline-offset:0;border-color:transparent}
form.rfq select option{color:#111}
form.rfq textarea{resize:vertical;min-height:74px}
form.rfq button{width:100%;margin-top:6px;background:var(--copper);color:#fff;border:0;padding:13px;border-radius:5px;
  font-family:inherit;font-size:14.5px;font-weight:700;cursor:pointer;letter-spacing:.4px}
form.rfq button:hover{background:var(--copper2)}
.formnote{font-size:12px;color:#98A1AC;margin-top:11px;text-align:center;line-height:1.55}

/* footer */
footer{background:#07090C;color:#7C848F;padding:52px 0 40px;font-size:13px}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;margin-bottom:36px}
@media(max-width:760px){.fgrid{grid-template-columns:1fr 1fr;gap:26px}}
footer h4{color:#fff;font-size:11.5px;letter-spacing:1.6px;text-transform:uppercase;margin:0 0 14px;font-weight:700}
footer a{color:#7C848F;text-decoration:none;display:block;margin-bottom:8px;font-size:13px}
footer a:hover{color:var(--copper2)}
.fbot{border-top:1px solid rgba(255,255,255,.08);padding-top:24px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12px}
.fbot span{color:#5A616B}

/* floating whatsapp */
.wa{position:fixed;right:20px;bottom:20px;z-index:70;background:#25D366;color:#0B2E1A;text-decoration:none;
  border-radius:999px;padding:13px 20px 13px 16px;font-size:14px;font-weight:700;
  display:flex;align-items:center;gap:9px;box-shadow:0 10px 30px rgba(37,211,102,.35);transition:transform .18s}
.wa:hover{transform:translateY(-2px)}
.wa svg{width:20px;height:20px}
@media(max-width:520px){.wa span{display:none}.wa{padding:14px;border-radius:50%}}

/* lightbox */
.lb{position:fixed;inset:0;background:rgba(5,7,10,.94);z-index:100;display:none;place-items:center;padding:30px;cursor:zoom-out}
.lb.on{display:grid}
.lb img{max-width:min(1100px,92vw);max-height:84vh;border-radius:6px}
.lb .cap{color:#B9C0CA;font-size:13px;text-align:center;margin-top:14px}
.lb .x{position:absolute;top:22px;right:26px;color:#fff;font-size:30px;line-height:1;cursor:pointer;opacity:.8}

.mono{font-variant-numeric:tabular-nums}
[id]{scroll-margin-top:80px}

/* 宽表压缩：8 列要塞进 1180 容器 */
table.spec th,table.spec td{padding:9px 9px;font-size:12px}
table.spec tbody th{font-size:12px;padding-left:10px}
table.spec thead th{font-size:10.5px;letter-spacing:.5px}
table.spec tbody tr:nth-child(even) th{background:#0F141A}
table.spec tbody tr:hover th{background:#1A212A}
table.spec thead th:first-child{position:sticky;left:0;z-index:3;background:#080A0E}