:root {
  --color-primary: #fcd535;
  --color-primary-active: #f0b90b;
  --color-ink: #181a20;
  --color-muted: #707a8a;
  --color-hairline-on-light: #eaecef;
  --color-canvas-light: #ffffff;
  --color-surface-soft-light: #fafafa;
  --color-surface-strong-light: #f5f5f5;
  --color-on-primary: #181a20;
  --color-trading-up: #0ecb81;
  --color-trading-down: #f6465d;
  --color-info: #3b82f6;
  --font-display: BinanceNova, system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-number: BinancePlex, BinanceNova, system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --rounded-md: 6px;
  --rounded-lg: 8px;
  --rounded-xl: 12px;
  --rounded-pill: 9999px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font-display);
  color: var(--color-ink);
  background: var(--color-canvas-light);
  line-height: 1.5;
  font-size: 14px;
}
a { color: var(--color-ink); text-decoration: none; }
a:hover { color: var(--color-primary-active); }
.wrap { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

.header { background: var(--color-canvas-light); border-bottom: 1px solid var(--color-hairline-on-light); padding: 12px 0; }
.header-inner { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; min-height: 48px; }
.logo { font-weight: 700; color: var(--color-primary-active); font-size: 20px; }
.logo:hover { text-decoration: none; color: var(--color-primary-active); }
.search { flex: 1; min-width: 200px; display: flex; gap: 8px; }
.search input {
  flex: 1; padding: 10px 16px; height: 40px;
  border: 1px solid var(--color-hairline-on-light); border-radius: var(--rounded-lg); font: inherit;
}
.search button {
  padding: 10px 20px; border: 0; background: var(--color-primary); color: var(--color-on-primary);
  font: inherit; font-weight: 600; cursor: pointer; border-radius: var(--rounded-md);
}
.links { display: flex; gap: 16px; font-size: 13px; }
.links a { color: var(--color-ink); }

.nav { border-bottom: 1px solid var(--color-hairline-on-light); background: var(--color-canvas-light); }
.nav-inner { display: flex; flex-wrap: wrap; gap: 4px 20px; padding: 8px 24px; }
.nav a { color: var(--color-ink); font-size: 14px; font-weight: 500; }
.nav a.on { color: var(--color-primary-active); }

.hero { padding: 24px 0; }
.ph {
  background: var(--color-surface-strong-light); color: var(--color-muted);
  display: flex; align-items: center; justify-content: center; font-size: 13px;
  border-radius: var(--rounded-lg);
}
.banner { height: 180px; background: var(--color-ink); color: var(--color-primary); font-weight: 700; font-size: 20px; }

.section { padding: 32px 0; }
.section h2 { font-size: 24px; font-weight: 600; margin: 0 0 16px; }

.cats { display: flex; flex-wrap: wrap; gap: 8px; }
.cats a {
  border: 1px solid var(--color-hairline-on-light); padding: 8px 14px;
  color: var(--color-ink); font-size: 13px; border-radius: var(--rounded-md);
}
.cats a:hover { text-decoration: none; background: var(--color-surface-soft-light); }

.products { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.item {
  border: 1px solid var(--color-hairline-on-light); border-radius: var(--rounded-lg);
  padding: 16px; color: var(--color-ink); background: var(--color-canvas-light);
}
.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: var(--color-ink); font-family: var(--font-number); font-weight: 700; }
.sub { color: var(--color-muted); font-size: 12px; }

.layout { display: grid; grid-template-columns: 200px 1fr; gap: 24px; padding: 24px 0; }
.side a {
  display: block; padding: 10px 0; color: var(--color-ink);
  border-bottom: 1px solid var(--color-hairline-on-light); font-size: 14px;
}
.side a.on { font-weight: 600; }

.detail { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; padding: 24px 0; }
.detail .ph { height: 280px; }
.detail h1 { font-size: 24px; font-weight: 600; margin: 0 0 8px; }
.sku { color: var(--color-muted); 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-on-light); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 24px; height: 40px; border: 0;
  background: var(--color-primary); color: var(--color-on-primary);
  font: inherit; font-weight: 600; cursor: pointer; border-radius: var(--rounded-md); margin-right: 8px;
}
.btn:hover { text-decoration: none; color: var(--color-on-primary); }
.btn-line {
  background: var(--color-canvas-light); color: var(--color-ink);
  border: 1px solid var(--color-hairline-on-light);
}
.btn-line:hover { color: var(--color-ink); }
.btn-up { background: var(--color-trading-up); color: #fff; }
.btn-down { background: var(--color-trading-down); color: #fff; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { border-bottom: 1px solid var(--color-hairline-on-light); padding: 12px 8px; text-align: left; }
td:nth-child(2), td:nth-child(4) { font-family: var(--font-number); }
.qty { width: 48px; padding: 6px; border: 1px solid var(--color-hairline-on-light); border-radius: var(--rounded-md); font: inherit; }

.user-list { list-style: none; margin: 0; padding: 0; }
.user-list li {
  border: 1px solid var(--color-hairline-on-light); border-radius: var(--rounded-lg);
  padding: 16px; margin-bottom: 8px;
}

.footer { background: var(--color-surface-soft-light); padding: 40px 0; color: var(--color-muted); 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; }
}

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