:root{
  --blue:#0b4f8a; --blue-d:#073863; --ink:#16232e; --muted:#5c6f80;
  --line:#e3e9ef; --bg:#f6f8fa; --orange:#ff7a29; --orange-d:#e8620f;
  --radius:12px; --shadow:0 2px 10px rgba(16,40,64,.07);
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Segoe UI","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.65}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{color:var(--orange)}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}

/* header / nav */
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.nav{display:flex;align-items:center;gap:26px;height:66px}
.logo{font-weight:800;font-size:19px;color:var(--blue-d);letter-spacing:.5px;white-space:nowrap}
.logo span{color:var(--orange)}
.nav-links{display:flex;gap:22px;flex:1;flex-wrap:wrap}
.nav-links a{font-size:15px;color:var(--ink);font-weight:500}
.nav-links a:hover,.nav-links a.active{color:var(--orange)}
.nav-cta{background:var(--orange);color:#fff!important;padding:9px 20px;border-radius:24px;font-weight:700;font-size:14px;white-space:nowrap}
.nav-cta:hover{background:var(--orange-d);color:#fff}

/* buttons */
.btn{display:inline-block;background:var(--orange);color:#fff;font-weight:700;padding:13px 30px;border-radius:28px;font-size:16px;border:none;cursor:pointer;transition:.2s}
.btn:hover{background:var(--orange-d);color:#fff}
.btn-o{display:inline-block;background:#fff;color:var(--blue-d);font-weight:700;padding:12px 28px;border-radius:28px;border:2px solid var(--blue-d)}
.btn-o:hover{background:var(--blue-d);color:#fff}
.btn-sm{padding:8px 18px;font-size:14px;border-radius:20px}

/* hero */
.hero{background:linear-gradient(135deg,#0b4f8a 0%,#073863 100%);color:#fff;padding:76px 0 64px}
.hero h1{font-size:40px;line-height:1.25;margin-bottom:16px;font-weight:800}
.hero p.lead{font-size:18px;opacity:.92;max-width:720px;margin-bottom:28px}
.hero .btns{display:flex;gap:14px;flex-wrap:wrap}

/* sections */
section{padding:64px 0}
.section-head{text-align:center;margin-bottom:40px}
.section-head h1,.section-head h2{font-size:31px;margin-bottom:10px;color:var(--blue-d)}
.section-head p{color:var(--muted);font-size:16px}
.bg-soft{background:var(--bg)}

/* advantages 4-col */
.adv{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:22px}
.adv .item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 22px;text-align:center}
.adv .ico{font-size:38px;margin-bottom:12px}
.adv h3{font-size:17px;margin-bottom:8px}
.adv p{font-size:14px;color:var(--muted)}

/* stats bar */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:20px;text-align:center}
.stats .n{font-size:34px;font-weight:800;color:var(--orange)}
.stats .l{font-size:14px;color:var(--muted)}

/* product grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:24px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:.2s}
.card:hover{transform:translateY(-4px);box-shadow:0 10px 26px rgba(16,40,64,.12)}
.card .thumb{aspect-ratio:1/1;background:#eef2f6;overflow:hidden}
.card .thumb img{width:100%;height:100%;object-fit:cover}
.card .body{padding:16px 18px 18px;flex:1;display:flex;flex-direction:column}
.card .sku{font-size:12px;font-weight:700;color:var(--orange);letter-spacing:.6px}
.card h3{font-size:16px;line-height:1.4;margin:6px 0 10px}
.card .meta{font-size:13px;color:var(--muted);margin-bottom:14px}
.card .kv{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}
.card .kv span{background:var(--bg);border:1px solid var(--line);border-radius:5px;padding:3px 8px;font-size:12px;color:#42586b}
.card .act{margin-top:auto;display:flex;gap:8px}
.card .act a{flex:1;text-align:center}
.badge{display:inline-block;background:var(--orange);color:#fff;font-size:11px;font-weight:700;padding:2px 9px;border-radius:11px;margin-left:8px;vertical-align:middle}

/* filter toolbar */
.toolbar{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;margin-bottom:26px}
.filter-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.filter-row+.filter-row{margin-top:12px;padding-top:12px;border-top:1px dashed var(--line)}
.filter-label{font-size:13px;font-weight:700;color:var(--muted);margin-right:6px;min-width:96px}
.chip{border:1px solid var(--line);background:#fff;border-radius:18px;padding:6px 14px;font-size:13px;cursor:pointer;color:#42586b;transition:.15s}
.chip:hover{border-color:var(--blue)}
.chip.on{background:var(--blue);border-color:var(--blue);color:#fff;font-weight:600}
.count-bar{font-size:14px;color:var(--muted);margin-bottom:14px}

/* spec table */
.spec-table{width:100%;border-collapse:collapse;font-size:14px}
.spec-table th,.spec-table td{border:1px solid var(--line);padding:9px 12px;text-align:left}
.spec-table th{background:var(--bg);width:38%;font-weight:600;color:#42586b}
.spec-table tr:nth-child(even) td{background:#fcfdfe}

/* modal */
.modal{display:none;position:fixed;inset:0;background:rgba(12,26,40,.62);z-index:100;overflow:auto;padding:24px}
.modal.open{display:block}
.modal-inner{max-width:1000px;margin:20px auto;background:#fff;border-radius:14px;overflow:hidden;position:relative}
.modal-close{position:absolute;right:14px;top:8px;font-size:30px;cursor:pointer;color:#93a4b3;z-index:3;line-height:1}
.modal-close:hover{color:var(--orange)}
.modal-body{display:grid;grid-template-columns:minmax(280px,1fr) 1fr;gap:28px;padding:30px}
@media(max-width:820px){.modal-body{grid-template-columns:1fr;padding:20px}}
.gallery .main{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:10px;background:#eef2f6}
.thumbs{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.thumbs img{width:64px;height:64px;object-fit:cover;border-radius:6px;cursor:pointer;border:2px solid transparent}
.thumbs img.active{border-color:var(--orange)}
.modal-body h2{font-size:22px;margin-bottom:6px}
.modal-body .sku{color:var(--orange);font-weight:700;font-size:13px;margin-bottom:14px}
.feat-tags{display:flex;flex-wrap:wrap;gap:6px;margin:14px 0}
.feat-tags span{background:#eaf3fa;color:var(--blue-d);border-radius:5px;padding:4px 10px;font-size:12px}

/* forms */
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:5px;color:#42586b}
.field input,.field select,.field textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:inherit}
.field textarea{min-height:96px;resize:vertical}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--blue)}

/* footer */
footer{background:var(--blue-d);color:#cfe0ee;padding:38px 0 24px;font-size:14px}
footer a{color:#cfe0ee}
footer a:hover{color:#fff}
.foot-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:26px;margin-bottom:22px}
.foot-grid h4{color:#fff;font-size:15px;margin-bottom:10px}
.foot-grid p,.foot-grid li{line-height:1.9}
.foot-grid ul{list-style:none}
.foot-bottom{border-top:1px solid rgba(255,255,255,.15);padding-top:16px;text-align:center;font-size:13px;opacity:.8}

/* misc */
.notice{background:#fff8e6;border:1px solid #f5d98a;border-radius:8px;padding:12px 16px;font-size:13px;color:#7a5c10;margin-bottom:22px}
.breadcrumb{font-size:13px;color:var(--muted);padding:14px 0}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--orange)}

@media(max-width:720px){
  .hero{padding:52px 0 44px}
  .hero h1{font-size:29px}
  .nav{height:auto;padding:12px 0;flex-wrap:wrap;gap:12px}
  .nav-links{order:3;width:100%;gap:14px}
  section{padding:44px 0}
  .section-head h2{font-size:25px}
}