:root{
  --bg:#f4f6f8; --bg-card:#ffffff; --brand:#00a881; --brand-light:#00c4a6;
  --text:#1c2a33; --text-dim:#5a6b78; --text-muted:#93a1ac;
  --border:rgba(0,0,0,0.08); --radius:14px; --maxw:1080px;
}
*{margin:0;padding:0;box-sizing:border-box;}
body{font-family:-apple-system,BlinkMacSystemFont,"Microsoft YaHei","PingFang SC",sans-serif;background:var(--bg);color:var(--text);line-height:1.65;-webkit-font-smoothing:antialiased;}
a{color:var(--brand);text-decoration:none;}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px;}
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,0.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);padding:13px 0;}
.nav-inner{display:flex;align-items:center;justify-content:space-between;}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;color:var(--text);font-size:17px;}
.brand .dot{width:10px;height:10px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px var(--brand);}
.nav-cta{background:var(--brand);color:#fff;font-weight:700;padding:8px 18px;border-radius:8px;font-size:14px;}
.breadcrumb{font-size:13px;color:var(--text-muted);padding:18px 0 4px;}
.breadcrumb a{color:var(--text-dim);}
.breadcrumb span{margin:0 7px;color:var(--border-strong);}
.detail{display:grid;grid-template-columns:1.15fr 1fr;gap:34px;margin:14px 0 40px;}
@media(max-width:760px){.detail{grid-template-columns:1fr;gap:22px;}}
.gallery .main{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:#fff;aspect-ratio:4/3;}
.gallery .main img{width:100%;height:100%;object-fit:contain;display:block;}
.thumbs{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap;}
.thumbs img{width:74px;height:74px;object-fit:contain;border:1px solid var(--border);border-radius:10px;background:#fff;cursor:pointer;}
.thumbs img.on{border-color:var(--brand);}
.title{font-size:26px;font-weight:800;line-height:1.35;margin-bottom:10px;}
.price{font-size:30px;font-weight:800;color:var(--brand-light);margin:6px 0 4px;display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;}
.price .op{font-size:15px;font-weight:500;color:var(--text-muted);text-decoration:line-through;}
.badge{display:inline-block;background:var(--brand);color:#fff;font-size:12px;font-weight:700;padding:3px 10px;border-radius:20px;vertical-align:middle;}
.meta{display:grid;grid-template-columns:1fr 1fr;gap:10px 18px;margin:18px 0;padding:18px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);}
.meta .k{font-size:13px;color:var(--text-muted);}
.meta .v{font-size:15px;color:var(--text);font-weight:600;margin-top:2px;}
.desc-h{font-size:16px;font-weight:700;margin:8px 0 10px;}
.desc{color:var(--text-dim);font-size:15px;white-space:pre-wrap;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;margin-bottom:18px;}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:10px;}
.btn{background:var(--brand);color:#fff;font-weight:700;padding:11px 22px;border-radius:9px;font-size:15px;}
.btn.ghost{background:#fff;color:var(--brand);border:1px solid var(--brand);}
.rel{margin:46px 0 60px;}
.rel h2{font-size:20px;margin-bottom:16px;}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:18px;}
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;overflow:hidden;transition:.2s;}
.card:hover{border-color:var(--brand);transform:translateY(-3px);}
.card img{width:100%;aspect-ratio:4/3;object-fit:contain;background:#eef2f5;}
.card .b{padding:12px 14px;}
.card .n{font-weight:600;font-size:14px;line-height:1.4;}
.card .p{color:var(--brand-light);font-weight:700;margin-top:6px;font-size:14px;}
.footer{border-top:1px solid var(--border);padding:24px 0;color:var(--text-muted);font-size:13px;text-align:center;}