:root {
  --color-primary: #1c1c1e;
  --color-on-primary: #ffffff;
  --color-brand-yellow: #ffd02f;
  --color-brand-blue: #4262ff;
  --color-coral-light: #ffc6c6;
  --color-rose-light: #fde0f0;
  --color-teal-light: #c3faf5;
  --color-canvas: #ffffff;
  --color-surface: #f7f8fa;
  --color-hairline: #e0e2e8;
  --color-hairline-strong: #c7cad5;
  --color-ink: #1c1c1e;
  --color-steel: #6b6f7e;
  --color-footer-bg: #1c1c1e;
  --rounded-md: 8px;
  --rounded-xl: 16px;
  --rounded-xxxl: 28px;
  --rounded-full: 9999px;
  --font: "Roobert PRO", "Noto Sans", system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--color-ink);
  background: var(--color-canvas);
  line-height: 1.5;
}
a { color: var(--color-brand-blue); text-decoration: none; }
.wrap { max-width: 1280px; margin: 0 auto; padding: 0 32px; }

.promo {
  background: var(--color-brand-yellow);
  color: var(--color-primary);
  text-align: center;
  font-size: 13px;
  font-weight: 600;
  padding: 8px 16px;
}

.header { padding: 12px 0; }
.header-inner { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.logo {
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-brand-yellow);
  padding: 4px 10px;
  border-radius: 8px;
  font-size: 18px;
}
.logo:hover { text-decoration: none; }
.search { flex: 1; min-width: 200px; display: flex; }
.search input {
  flex: 1;
  height: 40px;
  padding: 8px 16px;
  border: 1px solid var(--color-hairline);
  background: var(--color-surface);
  color: var(--color-steel);
  font: inherit;
  font-size: 14px;
  border-radius: var(--rounded-md) 0 0 var(--rounded-md);
}
.search button {
  padding: 8px 18px;
  border: 0;
  background: var(--color-primary);
  color: #fff;
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border-radius: 0 var(--rounded-full) var(--rounded-full) 0;
  height: 40px;
}
.links { display: flex; gap: 12px; font-size: 13px; font-weight: 500; }
.links a { color: var(--color-ink); }

.nav { border-bottom: 1px solid var(--color-hairline); }
.nav-inner { display: flex; flex-wrap: wrap; gap: 8px; padding: 10px 32px; }
.nav a {
  color: var(--color-steel);
  font-size: 14px;
  font-weight: 500;
  padding: 6px 16px;
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-full);
}
.nav a:hover { text-decoration: none; }
.nav a.on { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

.hero { padding: 24px 0; }
.ph {
  background: var(--color-surface);
  color: var(--color-steel);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  border-radius: var(--rounded-xl);
}
.banner { height: 200px; background: var(--color-brand-yellow); color: var(--color-primary); font-weight: 500; }

.section { padding: 32px 0; }
.section h2 { font-size: 22px; font-weight: 500; margin: 0 0 16px; }

.cats { display: flex; flex-wrap: wrap; gap: 8px; }
.cats a {
  padding: 8px 16px;
  color: var(--color-ink);
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--rounded-full);
}
.cats a:nth-child(4n+1) { background: var(--color-brand-yellow); }
.cats a:nth-child(4n+2) { background: var(--color-coral-light); }
.cats a:nth-child(4n+3) { background: var(--color-teal-light); }
.cats a:nth-child(4n+4) { background: var(--color-rose-light); }
.cats a:hover { text-decoration: none; }

.products { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.item {
  border: 1px solid var(--color-hairline);
  padding: 16px;
  color: var(--color-ink);
  border-radius: var(--rounded-xxxl);
}
.item:hover { text-decoration: none; }
.item .ph { height: 120px; margin-bottom: 8px; }
.item:nth-child(4n+1) .ph { background: var(--color-brand-yellow); }
.item:nth-child(4n+2) .ph { background: var(--color-coral-light); }
.item:nth-child(4n+3) .ph { background: var(--color-teal-light); }
.item:nth-child(4n+4) .ph { background: var(--color-rose-light); }
.item h3 { margin: 0 0 4px; font-size: 16px; font-weight: 500; }
.price { color: var(--color-ink); font-weight: 600; }
.sub { color: var(--color-steel); font-size: 12px; }

.layout { display: grid; grid-template-columns: 200px 1fr; gap: 24px; padding: 24px 0; }
.side a {
  display: block;
  padding: 8px 16px;
  color: var(--color-ink);
  border: 1px solid var(--color-hairline-strong);
  border-radius: var(--rounded-full);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
}
.side a.on { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

.detail { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; padding: 24px 0; }
.detail .ph { height: 280px; background: var(--color-brand-yellow); }
.detail h1 { font-size: 28px; font-weight: 500; margin: 0 0 8px; letter-spacing: -0.5px; }
.sku { color: var(--color-steel); font-size: 13px; margin-bottom: 12px; }
.spec { list-style: none; margin: 0 0 16px; padding: 0; font-size: 14px; }
.spec li { padding: 8px 0; border-bottom: 1px solid var(--color-hairline); }
.btn {
  display: inline-block;
  padding: 12px 24px;
  border: 0;
  background: var(--color-primary);
  color: #fff;
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  margin-right: 8px;
  border-radius: var(--rounded-full);
}
.btn:hover { text-decoration: none; color: #fff; }
.btn-line { background: transparent; color: var(--color-ink); border: 1px solid var(--color-hairline-strong); }
.btn-line:hover { color: var(--color-ink); }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { border-bottom: 1px solid var(--color-hairline); padding: 12px 8px; text-align: left; }
.qty { width: 48px; padding: 4px; border: 1px solid var(--color-hairline-strong); border-radius: var(--rounded-md); }

.user-list { list-style: none; margin: 0; padding: 0; }
.user-list li {
  border: 1px solid var(--color-hairline);
  padding: 12px;
  margin-bottom: 8px;
  border-radius: var(--rounded-xl);
}

.footer {
  background: var(--color-footer-bg);
  color: #a5a8b5;
  padding: 48px 0 40px;
  font-size: 13px;
}

@media (max-width: 800px) {
  .wrap, .nav-inner { padding-left: 16px; padding-right: 16px; }
  .products { grid-template-columns: repeat(2, 1fr); }
  .layout, .detail { grid-template-columns: 1fr; }
}

.ph { overflow: hidden; }
.ph img { width: 100%; height: 100%; object-fit: cover; display: block; }