:root {
  --color-primary: #0f62fe;
  --color-on-primary: #ffffff;
  --color-ink: #161616;
  --color-ink-muted: #525252;
  --color-ink-subtle: #8c8c8c;
  --color-canvas: #ffffff;
  --color-surface-1: #f4f4f4;
  --color-hairline: #e0e0e0;
  --color-inverse-canvas: #161616;
  --color-inverse-ink-muted: #c6c6c6;
  --font-sans: "IBM Plex Sans", "Helvetica Neue", Arial, system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --rounded-none: 0px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-ink);
  background: var(--color-canvas);
  line-height: 1.5;
  font-size: 16px;
  letter-spacing: 0.16px;
}
a { color: var(--color-primary); text-decoration: none; }
.wrap { max-width: 1584px; margin: 0 auto; padding: 0 32px; }

.header { border-bottom: 1px solid var(--color-hairline); padding: 8px 0; }
.header-inner { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.logo { font-weight: 400; color: var(--color-ink); font-size: 16px; }
.search { flex: 1; min-width: 200px; display: flex; }
.search input {
  flex: 1;
  padding: 11px 16px;
  border: 0;
  border-bottom: 1px solid var(--color-ink);
  background: var(--color-surface-1);
  font-family: var(--font-sans);
  border-radius: 0;
}
.search button {
  min-height: 48px;
  padding: 12px 16px;
  border: 0;
  background: var(--color-primary);
  color: var(--color-on-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  letter-spacing: 0.16px;
  cursor: pointer;
}
.links { display: flex; gap: 16px; font-size: 14px; }
.links a { color: var(--color-ink); }

.nav { border-bottom: 1px solid var(--color-hairline); }
.nav-inner { display: flex; flex-wrap: wrap; gap: 0; padding: 0 32px; }
.nav a {
  color: var(--color-ink-muted);
  font-size: 14px;
  padding: 16px 20px;
}
.nav a.on {
  color: var(--color-ink);
  font-weight: 600;
  box-shadow: inset 0 -2px 0 var(--color-primary);
}

.hero { padding: 24px 0; }
.ph {
  background: var(--color-surface-1);
  color: var(--color-ink-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  letter-spacing: 0.32px;
}
.banner { height: 180px; }

.section { padding: 32px 0; }
.section h2 { font-size: 24px; font-weight: 400; margin: 0 0 16px; }

.cats { display: flex; flex-wrap: wrap; gap: 0; }
.cats a {
  border: 1px solid var(--color-hairline);
  padding: 8px 16px;
  color: var(--color-ink);
  font-size: 14px;
  margin-right: -1px;
  margin-bottom: -1px;
}

.products { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.item {
  border: 1px solid var(--color-hairline);
  padding: 16px;
  color: var(--color-ink);
  margin-right: -1px;
  margin-bottom: -1px;
}
.item .ph { height: 120px; margin-bottom: 12px; }
.item h3 { margin: 0 0 4px; font-size: 16px; font-weight: 400; }
.price { font-weight: 600; }
.sub { color: var(--color-ink-subtle); font-size: 12px; letter-spacing: 0.32px; }

.layout { display: grid; grid-template-columns: 200px 1fr; gap: 0; padding: 24px 0; }
.side { border-right: 1px solid var(--color-hairline); padding-right: 16px; }
.side a {
  display: block;
  padding: 12px 0;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-hairline);
  font-size: 14px;
}
.side a.on { font-weight: 600; box-shadow: inset 2px 0 0 var(--color-primary); padding-left: 8px; }

.detail { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; padding: 32px 0; }
.detail .ph { height: 320px; }
.detail h1 { font-size: 32px; font-weight: 300; margin: 0 0 8px; letter-spacing: 0; }
.sku { color: var(--color-ink-subtle); font-size: 12px; letter-spacing: 0.32px; margin-bottom: 12px; }
.spec { list-style: none; margin: 0 0 16px; padding: 0; }
.spec li { padding: 8px 0; border-bottom: 1px solid var(--color-hairline); }
.btn {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 12px 16px;
  background: var(--color-primary);
  color: var(--color-on-primary);
  font-size: 14px;
  letter-spacing: 0.16px;
  margin-right: 8px;
}
.btn-line {
  background: var(--color-canvas);
  color: var(--color-primary);
  box-shadow: inset 0 0 0 1px var(--color-primary);
}

table { width: 100%; border-collapse: collapse; }
th, td { border-bottom: 1px solid var(--color-hairline); padding: 12px 8px; text-align: left; }
.qty {
  width: 48px;
  padding: 8px;
  border: 0;
  border-bottom: 1px solid var(--color-ink);
  background: var(--color-surface-1);
}

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

.footer {
  background: var(--color-inverse-canvas);
  color: var(--color-inverse-ink-muted);
  padding: 48px 0 32px;
  font-size: 14px;
}
.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; }