:root{
  --brand:#ff5a36; --brand2:#1f3a93; --ink:#23262b; --sub:#6b7280;
  --bg:#f6f7fb; --line:#e7e9ef; --card:#fff; --ok:#16a34a;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{overflow-x:hidden}
body{font-family:"PingFang SC","Microsoft YaHei",-apple-system,system-ui,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 16px}
.announce{background:linear-gradient(90deg,var(--brand),#ff8a4c);color:#fff;text-align:center;
  font-size:13px;padding:8px 12px;letter-spacing:.5px}
.site-header{position:sticky;top:0;z-index:50;background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.06)}
.hdr-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;gap:18px;padding:10px 16px}
.logo img{height:42px;width:auto}
.main-nav{flex:1}
.main-nav ul{display:flex;gap:26px;list-style:none}
.main-nav a{font-size:15px;font-weight:600;color:var(--ink);padding:6px 2px;position:relative;transition:.2s}
.main-nav a:hover,.main-nav a.active{color:var(--brand)}
.main-nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:3px;border-radius:3px;background:var(--brand)}
.hdr-actions{display:flex;align-items:center;gap:14px}
.ic{position:relative;font-size:20px;line-height:1}
.cart-count{position:absolute;top:-8px;right:-10px;background:var(--brand);color:#fff;font-size:11px;
  border-radius:10px;padding:0 5px;min-width:16px;text-align:center}
.cat-bar{background:var(--brand2)}
.cat-inner{max-width:1200px;margin:0 auto;overflow-x:auto}
.cat-bar ul{display:flex;gap:4px;list-style:none;white-space:nowrap}
.cat-bar a{display:block;color:#fff;font-size:13px;padding:9px 16px;opacity:.9}
.cat-bar a:hover{background:rgba(255,255,255,.14);opacity:1}
.hamburger{display:none;flex-direction:column;gap:4px;background:none;border:0;cursor:pointer;padding:4px}
.hamburger span{width:22px;height:2px;background:var(--ink);display:block}
.mobile-menu{display:none;background:#fff;border-top:1px solid var(--line)}
.mobile-menu ul{list-style:none;padding:8px 16px}
.mobile-menu li{border-bottom:1px solid var(--line)}
.mobile-menu a{display:block;padding:12px 4px;font-weight:600}
.mobile-menu.open{display:block}

/* hero */
.hero{margin:18px 0;position:relative;border-radius:16px;overflow:hidden;box-shadow:0 8px 30px rgba(0,0,0,.08)}
.slides{position:relative;height:380px}
.slide{position:absolute;inset:0;opacity:0;transition:opacity .8s}
.slide.active{opacity:1}
.slide img{width:100%;height:100%;object-fit:cover}
.slide .ov{position:absolute;left:0;top:0;bottom:0;display:flex;flex-direction:column;justify-content:center;
  padding:0 8%;max-width:640px;color:#fff;text-shadow:0 2px 12px rgba(0,0,0,.45);background:linear-gradient(90deg,rgba(0,0,0,.45),transparent 70%)}
.slide .ov h2{font-size:34px;margin-bottom:10px}
.slide .ov p{font-size:16px;margin-bottom:16px}
.btn{display:inline-block;background:var(--brand);color:#fff;padding:11px 26px;border-radius:30px;font-weight:700;
  border:0;cursor:pointer;transition:.2s;font-size:15px}
.btn:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(255,90,54,.35)}
.btn.ghost{background:#fff;color:var(--brand);border:1px solid var(--brand)}
.btn.line{background:#fff;color:var(--brand2);border:1px solid var(--brand2)}

/* brand strip */
.brand-strip{display:flex;align-items:center;gap:24px;background:#fff;border-radius:14px;padding:20px 24px;margin:18px 0;
  box-shadow:0 4px 16px rgba(0,0,0,.04);flex-wrap:wrap}
.brand-strip .bs-logo{font-size:22px;font-weight:800;color:var(--brand)}
.brand-strip p{color:var(--sub);font-size:14px;flex:1;min-width:220px}

/* section */
.sec{margin:30px 0}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:16px;gap:12px;flex-wrap:wrap}
.sec-head h2{font-size:24px;position:relative;padding-left:14px}
.sec-head h2::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:5px;border-radius:4px;background:var(--brand)}
.sec-head .more{color:var(--brand);font-size:14px;font-weight:600}

/* category tiles (asymmetric) */
.cat-tiles{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.cat-tiles a{position:relative;border-radius:14px;overflow:hidden;min-height:130px;display:flex;align-items:flex-end;
  color:#fff;padding:16px;font-weight:700;font-size:17px;box-shadow:0 4px 14px rgba(0,0,0,.06);
  background:linear-gradient(135deg,var(--brand2),#3b5bdb)}
.cat-tiles a:nth-child(1){grid-column:span 2;min-height:200px;font-size:22px}
.cat-tiles a:nth-child(4){grid-row:span 2;min-height:200px}
.cat-tiles a:nth-child(6){background:linear-gradient(135deg,var(--brand),#ff8a4c)}
.cat-tiles a:nth-child(2){background:linear-gradient(135deg,#0ea5e9,#22d3ee)}
.cat-tiles a:nth-child(3){background:linear-gradient(135deg,#16a34a,#4ade80)}
.cat-tiles a:nth-child(5){background:linear-gradient(135deg,#a855f7,#d946ef)}
.cat-tiles a:nth-child(7){background:linear-gradient(135deg,#f59e0b,#fbbf24)}
.cat-tiles a:nth-child(8){background:linear-gradient(135deg,#ec4899,#f472b6)}
.cat-tiles a:nth-child(9){background:linear-gradient(135deg,#475569,#64748b)}
.cat-tiles a:hover{transform:translateY(-3px);transition:.2s}

/* product grid */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{background:var(--card);border-radius:14px;overflow:hidden;box-shadow:0 3px 12px rgba(0,0,0,.05);
  transition:.22s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-5px);box-shadow:0 12px 28px rgba(0,0,0,.12)}
.card-img{position:relative;aspect-ratio:1/1;background:#f0f2f6;overflow:hidden}
.card-img img{width:100%;height:100%;object-fit:cover}
.card-img .tag{position:absolute;top:10px;left:10px;background:var(--brand);color:#fff;font-size:12px;
  padding:2px 9px;border-radius:20px;font-weight:700}
.card-body{padding:12px 14px 16px}
.card-title{font-size:14px;font-weight:600;line-height:1.45;height:2.9em;overflow:hidden;color:var(--ink)}
.card-price{margin-top:8px;display:flex;align-items:baseline;gap:8px}
.price{color:var(--brand);font-size:18px;font-weight:800}
.cmp{color:var(--sub);text-decoration:line-through;font-size:13px}

/* service bar */
.svc{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;background:#fff;border-radius:14px;padding:18px;margin:26px 0;
  box-shadow:0 4px 16px rgba(0,0,0,.04)}
.svc div{text-align:center;font-size:14px;color:var(--sub)}
.svc b{display:block;color:var(--ink);font-size:15px;margin-bottom:4px}

/* news teaser */
.news-list{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.news-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 3px 12px rgba(0,0,0,.05)}
.news-card .nc-date{font-size:12px;color:var(--sub);padding:12px 14px 0}
.news-card h3{font-size:16px;padding:6px 14px 14px}
.news-card:hover{transform:translateY(-3px);transition:.2s}

/* newsletter */
.newsletter{background:linear-gradient(120deg,var(--brand2),#3b5bdb);color:#fff;border-radius:16px;
  padding:34px 24px;text-align:center;margin:30px 0}
.newsletter h2{font-size:24px;margin-bottom:10px}
.newsletter p{opacity:.9;margin-bottom:16px}
.newsletter form{display:flex;gap:10px;max-width:460px;margin:0 auto;flex-wrap:wrap;justify-content:center}
.newsletter input{flex:1;min-width:220px;padding:12px 16px;border-radius:30px;border:0;font-size:15px}
.newsletter .btn{background:#fff;color:var(--brand2)}

/* footer */
.site-footer{background:#1c2230;color:#c7ccd6;margin-top:40px}
.ft-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:36px 16px}
.ft-col h4{color:#fff;font-size:15px;margin-bottom:12px}
.ft-col p{font-size:13px;margin:6px 0;color:#aeb4c0}
.ft-col a:hover{color:var(--brand)}
.ft-bottom{border-top:1px solid #2c3344;text-align:center;padding:16px;font-size:12px;color:#8b91a0}

/* product detail */
.breadcrumb{font-size:13px;color:var(--sub);padding:14px 0}
.breadcrumb a:hover{color:var(--brand)}
.pdp{display:grid;grid-template-columns:1fr 1fr;gap:36px;background:#fff;border-radius:16px;padding:28px;box-shadow:0 4px 16px rgba(0,0,0,.05)}
.gallery .main-img{border-radius:12px;overflow:hidden;aspect-ratio:1/1;background:#f0f2f6}
.gallery .main-img img{width:100%;height:100%;object-fit:cover}
.thumbs{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.thumbs img{width:70px;height:70px;object-fit:cover;border-radius:8px;border:2px solid transparent;cursor:pointer}
.thumbs img.on{border-color:var(--brand)}
.pdp-info h1{font-size:24px;margin-bottom:10px}
.pdp-price{display:flex;align-items:baseline;gap:12px;margin:14px 0}
.pdp-price .price{font-size:30px}
.pdp-desc{color:var(--sub);font-size:14px;margin:12px 0;line-height:1.8}
.qty{display:flex;align-items:center;gap:0;margin:18px 0;width:max-content;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.qty button{width:42px;height:42px;font-size:20px;background:#f4f5f8;border:0;cursor:pointer}
.qty input{width:54px;height:42px;text-align:center;border:0;border-left:1px solid var(--line);border-right:1px solid var(--line);font-size:16px}
.buy-row{display:flex;gap:12px;margin-top:8px;flex-wrap:wrap}
.pdp-svc{display:flex;gap:18px;margin-top:20px;color:var(--sub);font-size:13px;flex-wrap:wrap}
.pdp-svc span{display:flex;align-items:center;gap:6px}
.tabs{margin:30px 0;background:#fff;border-radius:14px;padding:8px;box-shadow:0 4px 16px rgba(0,0,0,.04)}
.tab-h{display:flex;gap:6px;border-bottom:1px solid var(--line);padding:0 8px}
.tab-h button{background:none;border:0;padding:14px 18px;font-size:15px;font-weight:600;color:var(--sub);cursor:pointer;border-bottom:3px solid transparent}
.tab-h button.on{color:var(--brand);border-bottom-color:var(--brand)}
.tab-p{padding:20px;font-size:14px;color:var(--sub);line-height:1.9}
.tab-p table{width:100%;border-collapse:collapse}
.tab-p td{border:1px solid var(--line);padding:10px 12px;font-size:14px}
.tab-p td:first-child{background:#f7f8fa;color:var(--ink);width:140px}
.rel{margin:30px 0}

/* forms */
.auth{max-width:440px;margin:30px auto;background:#fff;border-radius:16px;padding:30px;box-shadow:0 4px 16px rgba(0,0,0,.05)}
.auth h2{font-size:22px;margin-bottom:6px}
.auth .sub{color:var(--sub);font-size:13px;margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:6px}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit}
.field textarea{resize:vertical;min-height:90px}
.auth .btn{width:100%;margin-top:6px}
.auth .alt{text-align:center;margin-top:14px;font-size:13px;color:var(--sub)}
.auth .alt a{color:var(--brand)}
.notice{background:#eef6ff;border:1px solid #cfe3ff;color:#1f5fbf;padding:12px 14px;border-radius:10px;font-size:13px;margin-bottom:16px}

/* cart */
.cart-table{width:100%;border-collapse:collapse;background:#fff;border-radius:14px;overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,.05)}
.cart-table th,.cart-table td{padding:14px;text-align:left;font-size:14px;border-bottom:1px solid var(--line)}
.cart-table img{width:64px;height:64px;object-fit:cover;border-radius:8px}
.cart-table .ci-title{font-weight:600}
.qty.sm button{width:32px;height:32px;font-size:16px}
.qty.sm input{width:42px;height:32px}
.cart-foot{display:flex;justify-content:flex-end;align-items:center;gap:20px;margin:20px 0;flex-wrap:wrap}
.cart-foot .total{font-size:18px}
.cart-foot .total b{color:var(--brand);font-size:26px}
.empty{text-align:center;padding:60px 20px;color:var(--sub)}
.empty .btn{margin-top:16px}

/* checkout / pay */
.co{display:grid;grid-template-columns:1.3fr .9fr;gap:24px;align-items:start}
.co-form,.co-sum{background:#fff;border-radius:14px;padding:22px;box-shadow:0 4px 16px rgba(0,0,0,.05)}
.co-form h3,.co-sum h3{font-size:17px;margin-bottom:14px}
.sum-row{display:flex;justify-content:space-between;font-size:14px;padding:8px 0;border-bottom:1px dashed var(--line)}
.sum-row.total b{color:var(--brand);font-size:20px}
.pay-method{display:flex;gap:12px;margin:14px 0}
.pay-method label{flex:1;border:2px solid var(--line);border-radius:12px;padding:14px;text-align:center;cursor:pointer;font-weight:600}
.pay-method input{display:none}
.pay-method input:checked+span{border-color:var(--brand)}
.pay-method label.on{border-color:var(--brand);background:#fff6f3}
.qr{text-align:center;padding:18px;background:#f7f8fa;border-radius:12px;margin:10px 0}
.qr .box{width:180px;height:180px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--sub);font-size:13px}
.result{text-align:center;padding:60px 20px}
.result .ic-big{font-size:64px}
.result h2{font-size:26px;margin:10px 0}
.result p{color:var(--sub);margin:6px 0}
.result .btn{margin-top:18px}

/* prose pages */
.prose{max-width:820px;margin:24px auto;background:#fff;border-radius:16px;padding:34px;box-shadow:0 4px 16px rgba(0,0,0,.05)}
.prose h1{font-size:26px;margin-bottom:8px}
.prose h2{font-size:20px;margin:24px 0 10px;color:var(--brand2)}
.prose p,.prose li{color:var(--sub);font-size:15px;line-height:1.9;margin:8px 0}
.prose ul{padding-left:22px}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:20px}
.contact-info{background:#fff;border-radius:14px;padding:24px;box-shadow:0 4px 16px rgba(0,0,0,.05)}
.contact-info p{margin:8px 0;font-size:14px}
.map{background:#e9edf4;border-radius:12px;height:240px;display:flex;align-items:center;justify-content:center;color:var(--sub)}

/* responsive */
@media(max-width:980px){
  .grid{grid-template-columns:repeat(3,1fr)}
  .cat-tiles{grid-template-columns:repeat(2,1fr)}
  .cat-tiles a:nth-child(1){grid-column:span 2}
  .cat-tiles a:nth-child(4){grid-row:auto}
  .news-list{grid-template-columns:repeat(2,1fr)}
  .co{grid-template-columns:1fr}
  .pdp{grid-template-columns:1fr;gap:20px}
  .ft-inner{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:680px){
  .main-nav{display:none}
  .cat-bar{display:none}
  .hamburger{display:flex}
  .grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .slides{height:240px}
  .slide .ov h2{font-size:22px}
  .slide .ov p{font-size:13px}
  .svc{grid-template-columns:repeat(2,1fr)}
  .news-list{grid-template-columns:1fr}
  .ft-inner{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .sec-head h2{font-size:20px}
  .brand-strip{padding:16px}
}