:root{
  --bg:#0b0e14; --bg2:#111622; --card:#161c2b; --card2:#1c2435;
  --fg:#e6edf3; --muted:#9aa7b8; --line:#233047;
  --accent:#f59e0b; --accent2:#f97316; --accent3:#ea580c;
  --ok:#3ecf8e; --warn:#ffb454;
  --mono:"SF Mono",ui-monospace,"JetBrains Mono",Consolas,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--fg);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1180px;margin:0 auto;padding:0 22px}
.mono{font-family:var(--mono)}

/* NAV */
nav{position:sticky;top:0;z-index:50;background:rgba(11,14,20,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:62px}
.logo{font-weight:800;font-size:19px;letter-spacing:.5px;color:var(--fg);display:inline-flex;align-items:center;gap:8px}
.logo-img{height:30px;display:block}
.logo-text{font-weight:800;font-size:19px;letter-spacing:.5px;color:var(--fg);display:flex;flex-direction:column;line-height:1.1}
.logo-text small{font-weight:500;font-size:10px;letter-spacing:1px;color:var(--muted);text-transform:none;margin-top:1px}
.logo span{color:var(--accent)}
.nav-links{display:flex;gap:24px;font-size:14.5px}
.nav-links a{color:var(--muted)}
.nav-links a:hover,.nav-links a.active{color:var(--fg)}
.nav-right{display:flex;gap:10px;align-items:center}
.lang select{background:var(--card);color:var(--fg);border:1px solid var(--line);border-radius:7px;padding:5px 8px;font-size:13px}

/* HERO */
.hero{position:relative;background:radial-gradient(900px 400px at 75% -10%,rgba(249,115,22,.18),transparent),radial-gradient(700px 350px at 10% 10%,rgba(245,158,11,.14),transparent),var(--bg2);border-bottom:1px solid var(--line);overflow:hidden}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:46px 46px;opacity:.25;mask-image:radial-gradient(circle at 50% 0,#000,transparent 75%)}
.hero-inner{position:relative;padding:78px 0 70px}
.badge{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;color:var(--accent);border:1px solid var(--line);background:var(--card);padding:6px 12px;border-radius:999px;margin-bottom:20px}
.badge .dot{width:7px;height:7px;border-radius:50%;background:var(--ok);box-shadow:0 0 10px var(--ok)}
.hero h1{font-size:46px;line-height:1.1;font-weight:800;letter-spacing:-.5px;max-width:820px}
.hero h1 .grad{background:linear-gradient(90deg,var(--accent),var(--accent2),var(--accent3));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{margin-top:18px;font-size:18px;color:var(--muted);max-width:680px}
.cta{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 20px;border-radius:10px;font-weight:600;font-size:15px;border:1px solid transparent}
.btn.primary{background:linear-gradient(90deg,var(--accent2),var(--accent3));color:#fff}
.btn.ghost{border-color:var(--line);color:var(--fg);background:var(--card)}
.btn:hover{text-decoration:none;filter:brightness(1.08)}

/* STATS */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:46px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px 20px}
.stat b{display:block;font-size:26px;font-family:var(--mono);color:var(--accent)}
.stat span{font-size:13px;color:var(--muted)}

/* SECTION */
section{padding:64px 0}
.sec-head{margin-bottom:34px}
.sec-head .kicker{font-family:var(--mono);font-size:12.5px;color:var(--accent);letter-spacing:1px;text-transform:uppercase}
.sec-head h2{font-size:32px;font-weight:800;margin-top:8px;letter-spacing:-.3px}
.sec-head p{color:var(--muted);margin-top:10px;max-width:720px;font-size:16px}

/* CARDS */
.grid{display:grid;gap:18px}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.grid.c4{grid-template-columns:repeat(4,1fr)}
.grid.c5{grid-template-columns:repeat(5,1fr)}
.grid.c6{grid-template-columns:repeat(6,1fr)}
.grid.c7{grid-template-columns:repeat(7,1fr)}
.grid.c8{grid-template-columns:repeat(8,1fr)}
.grid.c9{grid-template-columns:repeat(9,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:24px;transition:.2s}
.card:hover{border-color:var(--accent);transform:translateY(-2px)}
.card h3{font-size:18px;margin-bottom:8px}
.card p{color:var(--muted);font-size:14.5px}
.card .tag{display:inline-block;font-family:var(--mono);font-size:11px;color:var(--accent);border:1px solid var(--line);border-radius:6px;padding:2px 8px;margin:0 6px 8px 0}

/* TABLE */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:var(--card)}
table{width:100%;border-collapse:collapse;font-size:14px;min-width:760px}
th,td{padding:13px 15px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--card2);color:var(--fg);font-weight:700;position:sticky;top:0}
tr:last-child td{border-bottom:none}
td .m{font-family:var(--mono);font-size:12.5px;color:var(--accent)}
tr:hover td{background:rgba(245,158,11,.04)}

/* CODE */
pre{background:#0a0d13;border:1px solid var(--line);border-radius:10px;padding:16px 18px;overflow:auto;font-family:var(--mono);font-size:13px;color:#cfe3ff;line-height:1.6}
code{font-family:var(--mono)}
.note{font-size:12.5px;color:var(--muted);margin-top:8px}

/* FOOTER */
footer{background:var(--bg2);border-top:1px solid var(--line);padding:46px 0 30px;margin-top:30px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:24px}
.foot-grid h4{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:1px;margin-bottom:12px}
.foot-grid a{display:block;color:var(--fg);font-size:14px;margin-bottom:8px;opacity:.85}
.foot-grid a:hover{opacity:1}
.foot-bottom{border-top:1px solid var(--line);margin-top:30px;padding-top:18px;color:var(--muted);font-size:13px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.site-links{display:flex;gap:18px;flex-wrap:wrap;font-size:13px}
.site-links a{color:var(--muted)}

/* PRODUCTS PAGE */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:8px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px 18px 16px;display:flex;flex-direction:column}
.card-h{font-size:16px;font-weight:700;margin-bottom:10px;color:var(--fg)}
.card ul{list-style:none;font-size:13.5px;color:var(--muted);display:flex;flex-direction:column;gap:6px;margin-bottom:12px;flex:1}
.card ul li{padding-left:14px;position:relative}
.card ul li:before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:50%;background:var(--accent)}
.dl{display:inline-block;font-size:13px;font-weight:600;color:var(--accent);border:1px solid var(--line);border-radius:7px;padding:5px 11px;background:var(--card2)}
.dl:hover{text-decoration:none;border-color:var(--accent)}
.prod-img{width:100%;height:172px;object-fit:cover;border-radius:10px;margin-bottom:12px;background:var(--bg2);border:1px solid var(--line)}

/* GALLERY */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:10px}
.gallery figure{margin:0;background:var(--card);border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:.2s}
.gallery figure:hover{border-color:var(--accent);transform:translateY(-2px)}
.gallery img{width:100%;height:158px;object-fit:cover;display:block;background:var(--bg2)}
.gallery figcaption{padding:10px 12px;font-size:13px;color:var(--muted);line-height:1.5}
.gallery figcaption b{color:var(--fg)}
@media(max-width:900px){.gallery{grid-template-columns:repeat(2,1fr)}}

/* PAGE HERO */
.page-hero{position:relative;background:radial-gradient(700px 300px at 75% 0%,rgba(249,115,22,.14),transparent),radial-gradient(500px 250px at 10% 10%,rgba(245,158,11,.10),transparent),var(--bg2);border-bottom:1px solid var(--line);overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:46px 46px;opacity:.22;mask-image:radial-gradient(circle at 50% 0%,#000,transparent 70%);pointer-events:none}
.page-hero .wrap{position:relative;padding:58px 0 48px}
.page-hero .sec-head{margin-bottom:0}
.page-hero h1{font-size:34px;line-height:1.18;font-weight:800;letter-spacing:-.4px;max-width:820px;margin-top:8px;scroll-margin-top:80px}
.page-hero p.sub{margin-top:14px;font-size:16.5px;color:var(--muted);max-width:720px}

/* PRODUCT DETAIL */
.prod-hero{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center}
.prod-hero-img{width:100%;border-radius:14px;border:1px solid var(--line);background:var(--card)}
.prod-hero-info h1{font-size:30px;font-weight:800;letter-spacing:-.3px}
.prod-hero-info .tag{display:inline-block;font-family:var(--mono);font-size:12px;color:var(--accent);border:1px solid var(--line);border-radius:6px;padding:3px 10px;margin-bottom:14px}
.prod-hero-info p{color:var(--muted);font-size:15px;margin-top:14px}
.prod-hero-info .cta{margin-top:24px}
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.spec-grid .spec-row{display:grid;grid-template-columns:160px 1fr;border-bottom:1px solid var(--line)}
.spec-grid .spec-row:last-child{border-bottom:none}
.spec-grid .spec-key{background:var(--card2);padding:12px 15px;font-size:13px;color:var(--muted);font-weight:600}
.spec-grid .spec-val{padding:12px 15px;font-size:14px;color:var(--fg)}
.spec-grid .spec-val .m{font-family:var(--mono);font-size:13px;color:var(--accent)}
@media(max-width:700px){.prod-hero{grid-template-columns:1fr}.spec-grid .spec-row{grid-template-columns:120px 1fr}}

/* RESPONSIVE */
@media(max-width:900px){.grid.c3,.grid.c2,.grid.c4,.grid.c5,.grid.c6,.grid.c7,.grid.c8,.grid.c9{grid-template-columns:1fr}.stats{grid-template-columns:repeat(2,1fr)}.hero h1{font-size:34px}.foot-grid{grid-template-columns:1fr 1fr}.nav-links{display:none}}
@media(max-width:1280px){.grid.c4,.grid.c5,.grid.c6,.grid.c7,.grid.c8,.grid.c9{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.stats{grid-template-columns:1fr}.foot-grid{grid-template-columns:1fr}.page-hero .wrap{padding:46px 0 38px}.page-hero h1{font-size:26px}}

/* EXTENSION: Product detail page */
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:24px}
.breadcrumb a{color:var(--muted)}
.product-hero{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;padding:30px 0}
.product-hero-img{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:30px;display:flex;align-items:center;justify-content:center;min-height:300px}
.product-hero-img img{max-width:100%;max-height:340px;object-fit:contain}
.product-hero-info .badge{font-family:var(--mono);font-size:12px;color:var(--accent);background:var(--card);border:1px solid var(--line);border-radius:6px;padding:4px 10px;display:inline-block;margin-bottom:14px}
.product-hero-info h1{font-size:36px;line-height:1.15;margin-bottom:14px}
.product-hero-info .tagline{font-size:16px;color:var(--muted);margin-bottom:18px}
.product-hero-info .chip{font-family:var(--mono);font-size:13px;color:var(--ok);background:var(--card);border:1px solid var(--line);border-radius:8px;padding:10px 14px;margin-bottom:20px}
.feature-list{list-style:none;padding:0}
.feature-list li{padding:14px 0 14px 28px;border-bottom:1px solid var(--line);position:relative;color:var(--fg)}
.feature-list li:before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:bold}
.feature-list li:last-child{border-bottom:none}
.spec-table{width:100%;border-collapse:collapse;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.spec-table tbody tr{border-bottom:1px solid var(--line)}
.spec-table tbody tr:last-child{border-bottom:none}
.spec-table td{padding:14px 18px;font-size:14px}
.spec-table td:first-child{background:var(--card2);color:var(--muted);font-weight:600;width:200px}
.tags{display:flex;flex-wrap:wrap;gap:10px}
.tags .tag{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:8px 16px;font-size:13px;color:var(--fg)}
.img-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.img-grid img{width:100%;border-radius:14px;border:1px solid var(--line);background:var(--card)}

/* Category section header */
.cat-head{background:linear-gradient(135deg,rgba(245,158,11,.08),transparent);border:1px solid var(--line);border-radius:18px;padding:30px 28px;margin-bottom:32px}
.cat-head h3{font-size:22px;margin-bottom:8px}
.cat-head p{color:var(--muted);font-size:14px;margin:0}

@media(max-width:700px){.product-hero{grid-template-columns:1fr;gap:24px}.product-hero-info h1{font-size:28px}.spec-table td:first-child{width:120px;font-size:12px}.spec-table td{padding:10px 12px;font-size:13px}}