:root{
  --bg:#0b0b0c;
  --surface:#141416;
  --surface2:#1a1a1d;
  --border:#232327;
  --border2:#2e2e33;
  --text:#f2f2f4;
  --muted:#b8b8bd;
  --dim:#8b8b92;
  --accent:#e8a93b;
  --accent-dark:#c78d24;
  --radius:14px;
  --max:1180px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}

/* header */
header{position:sticky;top:0;z-index:50;background:rgba(11,11,12,.88);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.hd{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:11px;font-weight:700;font-size:18px;letter-spacing:.06em}
.logo-mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--accent),#a86f10);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;letter-spacing:-.3px;color:#141410}
.logo small{display:block;font-size:9.5px;font-weight:500;letter-spacing:.24em;color:var(--dim)}
nav{display:flex;align-items:center;gap:4px}
nav a{padding:8px 12px;border-radius:8px;font-size:14px;color:var(--muted);font-weight:500}
nav a:hover{color:var(--text);background:var(--surface2)}
nav a.active{color:var(--accent)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:10px;font-weight:600;font-size:14px;cursor:pointer;border:none;transition:.18s}
.btn-wa{background:#1fa855;color:#fff}
.btn-wa:hover{background:#18934a}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--border2)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-gold{background:var(--accent);color:#181206}
.btn-gold:hover{background:#f5b94e}
.menu-btn{display:none;background:none;border:1px solid var(--border2);border-radius:8px;color:var(--text);padding:7px 11px;font-size:16px;cursor:pointer}

/* hero */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--border);background:
  radial-gradient(900px 420px at 78% -10%,rgba(232,169,59,.13),transparent 65%),
  radial-gradient(700px 380px at 8% 110%,rgba(59,130,246,.08),transparent 60%)}
.hero-in{display:grid;grid-template-columns:1fr 1.5fr;gap:32px;align-items:center;padding:72px 0 78px}
.hero h1{font-size:clamp(29px,3.2vw,40px);line-height:1.16;font-weight:800;margin:0 0 18px;letter-spacing:-.01em}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero p.lead{color:var(--muted);font-size:16.5px;max-width:520px}
.hero-cta{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}
.hero-stats{display:flex;flex-wrap:wrap;gap:22px 32px;margin-top:34px}
.hero-stats b{display:block;font-size:24px;font-weight:700;color:var(--text)}
.hero-stats span{font-size:12.5px;color:var(--dim)}
.hero-img{position:relative;margin-right:-26px}
.hero-img .collage{width:100%;display:block;border-radius:16px;border:1px solid var(--border2)}

/* sections */
section{padding:72px 0}
.sec-head{max-width:640px;margin-bottom:42px}
.sec-head .kicker{font-size:12.5px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--accent)}
.sec-head h2{font-size:30px;font-weight:750;margin:10px 0 12px;letter-spacing:-.01em}
.sec-head p{color:var(--muted)}

/* category cards */
.cat-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.cat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;cursor:pointer;transition:.2s;display:block}
.cat-card:hover{border-color:rgba(232,169,59,.55);transform:translateY(-3px)}
.cat-card .pic{background:#F2F1ED;border-radius:11px;padding:14px;margin-bottom:18px;aspect-ratio:1/.82;display:flex;align-items:center;justify-content:center}
.cat-card .pic img{mix-blend-mode:multiply}
.cat-card .pic img{max-height:170px;object-fit:contain}
.cat-card h3{font-size:16.5px;font-weight:650}
.cat-card .cnt{font-size:12.5px;color:var(--accent);font-weight:600;margin-top:3px}
.cat-card p{font-size:13px;color:var(--dim);margin-top:9px}
.cat-card .more{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:13px;font-weight:600;color:var(--accent)}

/* features */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px}
.feat .ico{width:44px;height:44px;border-radius:11px;background:rgba(232,169,59,.1);border:1px solid rgba(232,169,59,.25);display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:16px}
.feat h3{font-size:16px;font-weight:650;margin-bottom:8px}
.feat p{font-size:13.5px;color:var(--muted)}

/* category page */
.crumbs{font-size:13px;color:var(--dim);margin-bottom:22px}
.crumbs a:hover{color:var(--accent)}
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.prod-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;cursor:pointer;transition:.2s;display:flex;flex-direction:column}
.prod-card:hover{border-color:rgba(232,169,59,.55);transform:translateY(-3px)}
.prod-card .pic{background:#F2F1ED;padding:16px;aspect-ratio:1/.86;display:flex;align-items:center;justify-content:center}
.prod-card .pic img{mix-blend-mode:multiply}
.prod-card .pic.dark{background:#000000}
.prod-card .pic.dark img{border-radius:8px;mix-blend-mode:normal}
.prod-card .pic img{max-height:100%;object-fit:contain}
.prod-card .body{padding:18px}
.prod-card h3{font-size:15.5px;font-weight:650}
.prod-card .sub{font-size:12.5px;color:var(--dim);margin-top:5px}
.prod-card .link{margin-top:12px;font-size:13px;font-weight:600;color:var(--accent)}

/* product detail */
.detail{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.detail .pic{background:#F2F1ED;border-radius:16px;padding:30px;border:1px solid var(--border2)}
.detail .pic img{mix-blend-mode:multiply}
.detail .pic.dark{background:#000000}
.detail .pic.dark img{mix-blend-mode:normal}
.detail h1{font-size:27px;font-weight:750;letter-spacing:-.01em;margin-bottom:6px}
.detail .sub{color:var(--dim);font-size:13.5px;margin-bottom:20px}
.detail .desc{color:var(--muted);font-size:14.5px;margin-bottom:22px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}
.chip{font-size:12.5px;background:var(--surface2);border:1px solid var(--border2);color:var(--muted);padding:6px 12px;border-radius:999px}
.spec-wrap{background:var(--surface);border:1px solid var(--border);border-radius:12px;overflow:hidden}
.spec-wrap table{width:100%;border-collapse:collapse;font-size:13.5px}
.spec-wrap th{text-align:left;font-weight:600;color:var(--dim);padding:11px 16px;border-bottom:1px solid var(--border);white-space:nowrap;width:150px;font-size:12.5px}
.spec-wrap td{padding:11px 16px;border-bottom:1px solid var(--border);color:var(--text)}
.spec-wrap tr:last-child th,.spec-wrap tr:last-child td{border-bottom:none}
.detail-actions{display:flex;gap:12px;margin-top:22px;flex-wrap:wrap}
.back{display:inline-flex;align-items:center;gap:7px;color:var(--dim);font-size:13.5px;margin-bottom:26px}
.back:hover{color:var(--accent)}
.related{margin-top:70px}
.related h2{font-size:20px;font-weight:700;margin-bottom:20px}
.related .prod-grid{grid-template-columns:repeat(3,1fr)}

/* contact */
.contact-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:40px;display:grid;grid-template-columns:1fr 1fr;gap:44px}
.contact-box h2{font-size:26px;font-weight:750;margin-bottom:12px}
.contact-box p{color:var(--muted);font-size:14.5px}
.c-info{display:flex;flex-direction:column;gap:16px;margin-top:26px}
.c-item{display:flex;gap:13px;align-items:flex-start}
.c-item .ico{width:38px;height:38px;flex:none;border-radius:10px;background:var(--surface2);border:1px solid var(--border2);display:flex;align-items:center;justify-content:center;font-size:16px}
.c-item b{display:block;font-size:13px;color:var(--text)}
.c-item span{font-size:13px;color:var(--muted)}
form.inq label{display:block;font-size:13px;font-weight:600;color:var(--muted);margin:14px 0 6px}
form.inq input,form.inq textarea{width:100%;background:var(--bg);border:1px solid var(--border2);border-radius:10px;color:var(--text);padding:11px 14px;font-size:14px;font-family:inherit;outline:none}
form.inq input:focus,form.inq textarea:focus{border-color:var(--accent)}
form.inq textarea{min-height:100px;resize:vertical}

/* about strip */
.about-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:44px;align-items:center}
.about-grid h2{font-size:28px;font-weight:750;margin-bottom:14px}
.about-grid p{color:var(--muted);font-size:14.5px;margin-bottom:12px}
.about-num{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.about-num div{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px;text-align:center}
.about-num b{display:block;font-size:22px;color:var(--accent)}
.about-num span{font-size:12.5px;color:var(--dim)}

/* footer */
footer{border-top:1px solid var(--border);padding:44px 0 30px;background:#0e0e10}
.ft{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px}
.ft h4{font-size:13px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--text);margin-bottom:14px}
.ft a,.ft p{display:block;font-size:13.5px;color:var(--dim);margin-bottom:8px}
.ft a:hover{color:var(--accent)}
.ft-bot{margin-top:34px;padding-top:20px;border-top:1px solid var(--border);font-size:12.5px;color:#6c6c72;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

.view{display:none}
.view.on{display:block;animation:fade .3s ease}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

@media(max-width:960px){
  .hero-in,.detail,.contact-box,.about-grid{grid-template-columns:1fr;gap:30px}
  .hero-img{margin-right:0}
  .cat-grid,.prod-grid,.feat-grid,.related .prod-grid{grid-template-columns:repeat(2,1fr)}
  .ft{grid-template-columns:1fr 1fr}
  .hero h1{font-size:34px}
  nav{display:none;position:absolute;top:66px;left:0;right:0;background:var(--surface);border-bottom:1px solid var(--border);flex-direction:column;align-items:stretch;padding:12px}
  nav.open{display:flex}
  .menu-btn{display:block}
  .hd .btn-wa{display:none}
  section{padding:54px 0}
}
@media(max-width:560px){
  .cat-grid,.prod-grid,.feat-grid,.related .prod-grid{grid-template-columns:1fr}
  .hero-stats{gap:20px;flex-wrap:wrap}
  .hero h1{font-size:29px}
  .contact-box{padding:26px}
}
/* ---- SEO build additions ---- */
.sec-head h1{font-size:30px;font-weight:750;margin:10px 0 12px;letter-spacing:-.01em}
.intro{color:var(--muted);font-size:15px;max-width:840px;margin-bottom:30px}
.intro p{margin-bottom:13px}
.plist{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 32px}
.plist a{font-size:13px;padding:7px 12px;border:1px solid var(--border2);border-radius:999px;color:var(--muted)}
.plist a:hover{border-color:var(--accent);color:var(--accent)}
.faq{max-width:860px}
.faq details{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:16px 18px;margin-bottom:10px}
.faq summary{font-weight:600;font-size:15px;cursor:pointer;list-style:none;color:var(--text)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--accent);font-weight:700;margin-left:14px}
.faq details[open] summary::after{content:"\2013"}
.faq p{color:var(--muted);font-size:14px;margin-top:10px}
.cta-band{margin-top:56px;background:linear-gradient(135deg,rgba(232,169,59,.13),rgba(232,169,59,.03));border:1px solid rgba(232,169,59,.28);border-radius:var(--radius);padding:34px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.cta-band h2{font-size:22px;font-weight:750;margin-bottom:6px}
.cta-band p{color:var(--muted);font-size:14px}
.detail .sub a{color:var(--accent)}
@media(max-width:960px){.sec-head h1{font-size:26px}}

/* ---- 产品页正文（Step 3）---- */
.prose{max-width:860px;margin-top:44px}
.prose h2{font-size:22px;font-weight:720;margin:34px 0 12px;letter-spacing:-.01em}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:16px;font-weight:650;margin:22px 0 10px;color:var(--text)}
.prose p{color:var(--muted);font-size:15px;line-height:1.7;margin-bottom:14px}
.prose .lead{font-size:16px;color:#CFCFD4}
.prose-ul{list-style:none;padding:0;margin:0 0 6px}
.prose-ul li{color:var(--muted);font-size:14.5px;line-height:1.68;padding:10px 0 10px 20px;border-top:1px solid var(--border);position:relative}
.prose-ul li:last-child{border-bottom:1px solid var(--border)}
.prose-ul li:before{content:"";position:absolute;left:2px;top:20px;width:6px;height:6px;border-radius:2px;background:var(--accent)}
.prose-ul b{color:var(--text);font-weight:640}
.prose .also{font-size:14px;color:var(--dim);border-top:1px solid var(--border);padding-top:16px;margin-top:26px}
.prose .also a{color:var(--accent);font-weight:600}

/* ---- Guides / 文章页（Step 4）---- */
.art{max-width:840px}
.art-meta{display:flex;gap:16px;flex-wrap:wrap;color:var(--dim);font-size:13px;margin-bottom:28px;padding-bottom:18px;border-bottom:1px solid var(--border)}
.toc{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:18px 22px;margin:0 0 32px}
.toc b{display:block;color:var(--text);font-size:13px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:10px}
.toc a{display:block;color:var(--muted);font-size:14px;padding:5px 0;border-bottom:1px dashed rgba(255,255,255,.06)}
.toc a:last-child{border-bottom:0}
.toc a:hover{color:var(--accent)}
.cmp-wrap{overflow-x:auto;margin:20px 0 28px}
table.cmp{width:100%;border-collapse:collapse;font-size:13.8px;min-width:580px}
table.cmp th,table.cmp td{border:1px solid var(--border);padding:11px 13px;text-align:left;vertical-align:top;color:var(--muted);line-height:1.55}
table.cmp th{background:#17171a;color:var(--text);font-weight:650}
table.cmp td:first-child{color:var(--text);font-weight:560;width:26%}
.prose-ol{list-style:none;padding:0;margin:0 0 6px;counter-reset:step}
.prose-ol li{position:relative;padding:12px 0 12px 36px;border-top:1px solid var(--border);color:var(--muted);font-size:14.5px;line-height:1.68;counter-increment:step}
.prose-ol li:last-child{border-bottom:1px solid var(--border)}
.prose-ol li:before{content:counter(step);position:absolute;left:0;top:12px;width:22px;height:22px;border-radius:50%;background:rgba(232,169,59,.14);color:var(--accent);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center}
.prose-ol b{color:var(--text);font-weight:640}
.gcard{display:block;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px 28px;margin-bottom:16px;transition:border-color .18s,transform .18s}
.gcard:hover{border-color:rgba(232,169,59,.42)}
.gcard h2{font-size:20px;font-weight:700;margin:8px 0 10px;letter-spacing:-.01em}
.gcard p{color:var(--muted);font-size:14.5px;line-height:1.65}
.gcard .more{color:var(--accent);font-size:13.5px;font-weight:650;display:inline-block;margin-top:12px}
.gk{color:var(--dim);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase}