*{margin:0;padding:0;box-sizing:border-box;font-family:system-ui}
body{background:#f5f7fa;padding:20px}
.wrap{max-width:900px;margin:0 auto}
.site-head{text-align:center;padding:20px 0 15px;border-bottom:1px solid #eee;margin-bottom:20px}
.notice{color:#666;margin-top:6px;font-size:14px}
.search-bar{display:flex;gap:10px;margin-bottom:20px;flex-wrap:wrap}
#searchInput{flex:1;min-width:200px;padding:10px;border:1px solid #ddd;border-radius:6px}
#catSelect{padding:10px;border:1px solid #ddd;border-radius:6px}
.item{padding:15px;border:1px solid #e5e7eb;border-radius:8px;margin-bottom:12px}
.name{font-size:16px;font-weight:500;margin-bottom:6px}
.price{color:#f53f3f;font-weight:bold;margin-bottom:4px}
.stock{font-size:13px;color:#777;margin-bottom:8px}
.buy-btn{display:inline-block;padding:7px 16px;background:#2563eb;color:#fff;border-radius:6px;text-decoration:none;font-size:14px}
.nosale{color:#999}