:root{--blue:#0b5cd5;--blue-d:#0847a3;--ink:#0f172a;--muted:#64748b;--soft:#94a3b8;--line:#e5ebf3;--bg:#f6f8fb;--accent:#f97316}
*{box-sizing:border-box}
body{margin:0;font-family:"PingFang SC","Microsoft YaHei",-apple-system,"Helvetica Neue",sans-serif;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;line-height:1.7}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.w{max-width:1200px;margin:0 auto;padding:0 24px}
.clear{clear:both}

.hd{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.hd-in{display:flex;align-items:center;gap:18px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{width:38px;height:38px;border-radius:9px;background:linear-gradient(135deg,#0b5cd5,#08306b);color:#fff;font-weight:700;font-size:17px;display:flex;align-items:center;justify-content:center;letter-spacing:0}
.logo-img{height:52px;width:auto;border-radius:6px}
.brand-t{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:.2px}
.brand-t em{display:block;font-size:11px;font-weight:400;color:var(--soft);font-style:normal;letter-spacing:.5px;margin-top:1px}
.nv{display:flex;align-items:center;gap:22px;margin-left:auto;font-size:14px;color:#475569}
.nv a{padding:6px 2px;border-bottom:2px solid transparent;white-space:nowrap}
.nv a:hover{color:var(--blue)}
.nv a.on{color:var(--blue);border-bottom-color:var(--blue);font-weight:600}
.nv-cart{flex:0 0 auto;display:inline-flex;align-items:center;gap:6px;padding:8px 16px;background:var(--blue);color:#fff;border-radius:20px;font-size:13.5px;font-weight:600;box-shadow:0 4px 12px rgba(11,92,213,.24)}
.nv-cart:hover{background:var(--blue-d)}
.nv-cart i{font-style:normal;background:#fff;color:var(--blue);min-width:18px;height:18px;line-height:18px;text-align:center;border-radius:9px;font-size:11px;font-weight:700;padding:0 4px}

.hero{background:linear-gradient(120deg,#062a5e 0%,#0b4aa8 46%,#0b5cd5 100%);color:#fff;position:relative;overflow:hidden}
.hero:after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:rgba(255,255,255,.05)}
.hero-in{display:grid;grid-template-columns:1.25fr .75fr;gap:48px;align-items:center;padding:64px 24px 60px;position:relative;z-index:2}
.hero-k{display:inline-block;font-size:12.5px;letter-spacing:1.5px;color:#9ec2ff;border:1px solid rgba(158,194,255,.4);border-radius:14px;padding:4px 12px;margin-bottom:16px}
.hero h1{font-size:40px;line-height:1.28;margin:0 0 16px;font-weight:700;letter-spacing:-.5px}
.hero h1 em{font-style:normal;color:#ffd08a}
.hero p{font-size:15px;color:rgba(255,255,255,.8);max-width:520px;margin:0 0 26px}
.hero-b{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:11px 22px;border-radius:8px;font-size:14.5px;font-weight:600;cursor:pointer;border:0;transition:.18s}
.btn-p{background:var(--accent);color:#fff;box-shadow:0 4px 14px rgba(249,115,22,.3)}
.btn-p:hover{background:#ea6a0c}
.btn-g{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.35)}
.btn-g:hover{background:rgba(255,255,255,.2)}
.btn-o{background:#fff;color:var(--blue);border:1px solid #cfdcf2}
.btn-o:hover{border-color:var(--blue);color:var(--blue-d)}
.btn-sm{padding:7px 14px;font-size:13px;border-radius:6px}
.hero-card{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);border-radius:12px;padding:22px 24px;backdrop-filter:blur(6px)}
.hero-card b{display:block;font-size:13px;color:#9ec2ff;font-weight:500;letter-spacing:1px;margin-bottom:14px}
.hero-row{display:flex;justify-content:space-between;font-size:13.5px;padding:9px 0;border-bottom:1px dashed rgba(255,255,255,.14);color:rgba(255,255,255,.78)}
.hero-row:last-child{border:0}
.hero-row span{color:#fff;font-weight:500}

.sec{padding:64px 0}
.sec-head{text-align:center;margin-bottom:34px}
.sec-k{font-size:12.5px;letter-spacing:2px;color:var(--blue);font-weight:600}
.sec-h{font-size:28px;margin:8px 0 0;font-weight:700;letter-spacing:-.3px}
.sec-p{color:var(--muted);font-size:14px;margin-top:8px}
.sec.alt{background:#fff}
.cats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.cat{background:#fff;border:1px solid var(--line);border-radius:12px;padding:26px 22px;transition:.2s}
.cat:hover{border-color:#c7dafc;box-shadow:0 10px 26px rgba(16,42,80,.08)}
.cat-ic{width:46px;height:46px;border-radius:11px;background:#eaf1ff;color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:700;margin-bottom:16px}
.cat-n{font-size:17px;font-weight:700;margin-bottom:6px}
.cat-d{font-size:13px;color:var(--muted);line-height:1.75;min-height:48px}
.cat-more{font-size:12.5px;color:var(--blue);margin-top:12px;font-weight:600}

.adv{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;background:#fff}
.adv-i{padding:24px;border-left:3px solid #e8effb}
.adv-i b{display:block;font-size:15px;margin-bottom:6px}
.adv-i p{margin:0;font-size:13px;color:var(--muted)}

.prods{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.prod{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:.2s;display:flex;flex-direction:column}
.prod:hover{box-shadow:0 12px 30px rgba(16,42,80,.09);border-color:#cbd9ee;transform:translateY(-2px)}
.prod-img{aspect-ratio:4/3;background:#f1f5fb;overflow:hidden}
.prod-img img{width:100%;height:100%;object-fit:cover}
.prod-b{padding:16px 18px 18px}
.prod-t{font-size:15px;font-weight:700;margin-bottom:4px}
.prod-s{font-size:12.5px;color:var(--muted);min-height:34px}
.prod-m{display:flex;justify-content:space-between;align-items:center;margin-top:12px;padding-top:12px;border-top:1px dashed var(--line);font-size:12.5px;color:var(--soft)}
.prod-m i{font-style:normal;color:var(--blue);font-weight:600}

.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.step{background:#fff;border:1px solid var(--line);border-radius:10px;padding:20px 18px;position:relative}
.step-n{font-size:12px;color:var(--blue);font-weight:700;letter-spacing:1px}
.step-t{font-size:15px;font-weight:700;margin:8px 0 6px}
.step-d{font-size:12.5px;color:var(--muted);margin:0}

.cta-bar{background:#0f172a;border-radius:14px;padding:34px 38px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.cta-bar .t{color:#fff;font-size:20px;font-weight:700;margin:0 0 6px}
.cta-bar .d{color:#94a3b8;font-size:13.5px;margin:0}

.ft{background:#0b1220;color:#8f9cb0;margin-top:20px}
.ft-in{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:30px;padding:44px 24px 34px}
.ft-b-t{color:#fff;font-size:17px;font-weight:700;margin-bottom:10px}
.ft p{margin:0 0 6px;font-size:12.5px;line-height:1.8}
.ft-c-t{color:#cbd5e1;font-size:13px;margin-bottom:12px;font-weight:600}
.ft a{display:block;font-size:12.5px;margin-bottom:7px}
.ft a:hover{color:#fff}
.ft-b{border-top:1px solid rgba(255,255,255,.08);padding:18px 24px 26px;font-size:12px;text-align:center;color:#6b7a8f}
.ft-b a{color:#8f9cb0;margin:0 6px}

.crumb{font-size:12.5px;color:var(--soft);padding:16px 0 0}
.crumb a{color:var(--soft)}
.crumb span{color:#475569}
.page-h{font-size:26px;font-weight:700;margin:10px 0 6px}
.page-p{color:var(--muted);font-size:13.5px;margin:0 0 22px}

.detail{display:grid;grid-template-columns:1.05fr .95fr;gap:30px;align-items:start}
.gallery{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;overflow:hidden}
.gallery .big{width:100%;height:430px;max-height:430px;border-radius:8px;overflow:hidden;background:#f1f5fb}
.gallery .big img{width:100%;height:100%;object-fit:contain}
.thumbs{display:flex;gap:8px;margin-top:10px;overflow-x:auto}
.thumbs img{width:64px;height:64px;object-fit:cover;border-radius:6px;border:1px solid var(--line);cursor:pointer}
.d-info h1{font-size:24px;margin:0 0 8px}
.d-sub{color:var(--muted);font-size:13.5px;margin-bottom:16px}
.d-meta{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:16px}
.tag{font-size:12px;color:#0b52b8;background:#eaf1ff;border-radius:5px;padding:4px 9px}
.price-box{background:#f8fbff;border:1px solid #dfeafa;border-radius:10px;padding:16px 18px;margin-bottom:18px}
.price-box b{font-size:22px;color:var(--accent);font-weight:700}
.price-box span{font-size:12.5px;color:var(--muted);margin-left:8px}
.d-spec{background:#fff;border:1px solid var(--line);border-radius:10px;padding:6px 0;margin-bottom:16px}
.d-spec table{width:100%;border-collapse:collapse;font-size:13px}
.d-spec th,.d-spec td{padding:9px 14px;border-bottom:1px solid var(--line);text-align:left}
.d-spec th{color:var(--muted);font-weight:500;width:34%;background:#fbfcfe}
.buy{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.buy input{width:110px;padding:10px 12px;border:1px solid #d7e0ee;border-radius:8px;font-size:14px}

.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:26px 28px}
.card+.card{margin-top:18px}
.card-t{font-size:17px;font-weight:700;margin:0 0 14px}

.form .field{margin-bottom:16px}
.form label{display:block;font-size:13px;color:#475569;margin-bottom:6px;font-weight:500}
.form label i{color:#dc2626;font-style:normal}
.form input,.form select,.form textarea{width:100%;padding:11px 14px;border:1px solid #d7e0ee;border-radius:8px;font-size:14px;font-family:inherit;color:var(--ink);background:#fff}
.form input:focus,.form textarea:focus{border-color:var(--blue);outline:0;box-shadow:0 0 0 3px rgba(11,92,213,.1)}
.form textarea{min-height:96px;resize:vertical}
.form .row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form .hint{font-size:12px;color:var(--soft);margin-top:6px}

.table{width:100%;border-collapse:collapse;font-size:13.5px;background:#fff}
.table th,.table td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
.table th{background:#f8fafd;color:#475569;font-weight:600;font-size:13px}
.table .r{text-align:right}

.tip{padding:12px 16px;border-radius:8px;font-size:13.5px;margin-bottom:18px}
.tip.ok{background:#ecfdf5;color:#067a48;border:1px solid #a7f3d0}
.tip.err{background:#fef2f2;color:#b42318;border:1px solid #fecaca}
.tip.info{background:#eff6ff;color:#15508f;border:1px solid #dbeafe}
.empty{text-align:center;padding:50px 20px;color:var(--soft);font-size:13.5px}

@media(max-width:1000px){
  .hero-in{grid-template-columns:1fr;gap:26px;padding:44px 24px}
  .hero h1{font-size:30px}
  .cats,.adv{grid-template-columns:repeat(2,1fr)}
  .prods{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .detail{grid-template-columns:1fr}
  .hd-in{flex-wrap:wrap;height:auto;padding:12px 24px;gap:10px}
  .nv{display:flex;width:100%;margin-left:0;order:3;overflow-x:auto;gap:16px;padding-bottom:2px;font-size:13px;-webkit-overflow-scrolling:touch}
  .nv a{border-bottom:none;padding:4px 0}
  .brand-t em{display:none}
  .ft-in{grid-template-columns:1fr 1fr;gap:22px}
}
@media(max-width:640px){
  .w{padding:0 16px}
  .hd-in{height:auto;padding:10px 16px;gap:8px}
  .hero-in{padding:36px 16px}
  .brand-t{font-size:14px}
  .nv-cart{padding:7px 12px;font-size:12.5px}
  .hero h1{font-size:25px}
  .hero p{font-size:13.5px}
  .sec{padding:42px 0}
  .sec-h{font-size:22px}
  .cats,.prods,.flow{grid-template-columns:1fr}
  .cta-bar{padding:24px;border-radius:10px}
  .cta-bar .t{font-size:17px}
  .ft-in{grid-template-columns:1fr;padding:32px 16px 22px}
  .form .row2{grid-template-columns:1fr}
  .page-h{font-size:21px}
}

.buy input{min-width:150px}