* { box-sizing: border-box; }
body { margin: 0; font-family: "Microsoft YaHei", "PingFang SC", sans-serif; color: #222; background: #fff; line-height: 1.5; }
a { color: #c2410c; text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 16px; }

.header { border-bottom: 1px solid #ddd; padding: 12px 0; }
.header-inner { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.logo { font-weight: 700; color: #222; font-size: 18px; }
.logo:hover { text-decoration: none; }
.search { flex: 1; min-width: 200px; display: flex; }
.search input { flex: 1; padding: 8px; border: 1px solid #ccc; font: inherit; }
.search button { padding: 8px 14px; border: 1px solid #222; background: #222; color: #fff; font: inherit; cursor: pointer; }
.links { display: flex; gap: 12px; font-size: 13px; }
.links a { color: #333; }

.nav { border-bottom: 1px solid #ddd; }
.nav-inner { display: flex; flex-wrap: wrap; gap: 4px 16px; padding: 8px 16px; }
.nav a { color: #333; font-size: 14px; }
.nav a.on { font-weight: 700; }

.hero { padding: 24px 0; border-bottom: 1px solid #eee; }
.ph { background: #f2f2f2; color: #888; display: flex; align-items: center; justify-content: center; font-size: 13px; overflow: hidden; }
.ph img { width: 100%; height: 100%; object-fit: cover; display: block; }
.banner { height: 180px; }
.item .ph { height: 120px; }
.detail .ph { height: 280px; }

.section { padding: 24px 0; }
.section h2 { font-size: 16px; margin: 0 0 12px; }

.cats { display: flex; flex-wrap: wrap; gap: 8px; }
.cats a { border: 1px solid #ddd; padding: 6px 12px; color: #333; font-size: 13px; }
.cats a:hover { text-decoration: none; border-color: #c2410c; color: #c2410c; }

.products { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.item { border: 1px solid #ddd; padding: 12px; color: #222; }
.item:hover { text-decoration: none; }
.item .ph { height: 120px; margin-bottom: 8px; }
.item h3 { margin: 0 0 4px; font-size: 14px; font-weight: 600; }
.price { color: #c2410c; font-weight: 700; }
.sub { color: #888; font-size: 12px; }

.layout { display: grid; grid-template-columns: 200px 1fr; gap: 24px; padding: 24px 0; }
.side a { display: block; padding: 8px 0; color: #333; border-bottom: 1px solid #eee; font-size: 14px; }
.side a.on { font-weight: 700; }

.detail { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; padding: 24px 0; }
.detail .ph { height: 280px; }
.detail h1 { font-size: 20px; margin: 0 0 8px; }
.sku { color: #888; font-size: 13px; margin-bottom: 12px; }
.spec { list-style: none; margin: 0 0 16px; padding: 0; font-size: 14px; }
.spec li { padding: 6px 0; border-bottom: 1px solid #eee; }
.btn { display: inline-block; padding: 8px 16px; border: 1px solid #222; background: #222; color: #fff; font: inherit; cursor: pointer; margin-right: 8px; }
.btn:hover { text-decoration: none; color: #fff; }
.btn-line { background: #fff; color: #222; }
.btn-line:hover { color: #222; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { border-bottom: 1px solid #eee; padding: 10px 8px; text-align: left; }
.qty { width: 48px; padding: 4px; }

.user-list { list-style: none; margin: 0; padding: 0; }
.user-list li { border: 1px solid #ddd; padding: 12px; margin-bottom: 8px; }

.footer { border-top: 1px solid #ddd; padding: 24px 0 40px; color: #666; font-size: 13px; }
.footer p { margin: 0 0 4px; }

@media (max-width: 800px) {
  .products { grid-template-columns: repeat(2, 1fr); }
  .layout, .detail { grid-template-columns: 1fr; }
}