:root {
  --color-primary: #0066cc;
  --color-primary-focus: #0071e3;
  --color-ink: #1d1d1f;
  --color-ink-muted-80: #333333;
  --color-ink-muted-48: #7a7a7a;
  --color-hairline: #e0e0e0;
  --color-canvas: #ffffff;
  --color-canvas-parchment: #f5f5f7;
  --color-surface-black: #000000;
  --color-on-primary: #ffffff;
  --color-on-dark: #ffffff;
  --font-display: "SF Pro Display", system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-text: "SF Pro Text", system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --rounded-sm: 8px;
  --rounded-lg: 18px;
  --rounded-pill: 9999px;
  --product-shadow: rgba(0, 0, 0, 0.22) 3px 5px 30px 0;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font-text);
  color: var(--color-ink);
  background: var(--color-canvas-parchment);
  line-height: 1.47;
  font-size: 17px;
  letter-spacing: -0.374px;
}
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1440px; margin: 0 auto; padding: 0 24px; }

.header { background: var(--color-surface-black); padding: 0; }
.header-inner {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  min-height: 44px; max-width: 1024px; margin: 0 auto; padding: 8px 16px;
}
.logo { color: var(--color-on-dark); font-size: 17px; }
.logo:hover { text-decoration: none; }
.search { flex: 1; min-width: 200px; display: flex; }
.search input {
  flex: 1; padding: 8px 20px; height: 36px; border: 0;
  border-radius: var(--rounded-pill) 0 0 var(--rounded-pill);
  font: inherit; font-size: 14px;
}
.search button {
  padding: 8px 16px; border: 0; background: var(--color-primary); color: var(--color-on-primary);
  font: inherit; font-size: 14px; cursor: pointer;
  border-radius: 0 var(--rounded-pill) var(--rounded-pill) 0;
}
.links { display: flex; gap: 16px; font-size: 12px; }
.links a { color: rgba(255,255,255,0.8); }

.nav { background: var(--color-canvas); border-bottom: 1px solid var(--color-hairline); }
.nav-inner { display: flex; flex-wrap: wrap; gap: 4px 20px; padding: 12px 24px; max-width: 1440px; margin: 0 auto; }
.nav a { color: var(--color-ink); font-size: 14px; }
.nav a.on { color: var(--color-primary); }

.hero { padding: 24px 0; }
.ph {
  background: var(--color-canvas); color: var(--color-ink-muted-48);
  display: flex; align-items: center; justify-content: center; font-size: 13px;
  border-radius: var(--rounded-lg);
}
.banner { height: 280px; box-shadow: var(--product-shadow); }

.section { padding: 32px 0; }
.section h2 {
  font-family: var(--font-display); font-size: 40px; font-weight: 600;
  margin: 0 0 20px; letter-spacing: 0;
}

.cats { display: flex; flex-wrap: wrap; gap: 8px; }
.cats a {
  background: var(--color-canvas); padding: 12px 16px;
  color: var(--color-ink); font-size: 14px; border-radius: var(--rounded-pill);
  border: 1px solid var(--color-hairline);
}
.cats a:hover { text-decoration: none; }

.products { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.item {
  background: var(--color-canvas); border-radius: var(--rounded-lg);
  padding: 24px; color: var(--color-ink); border: 1px solid var(--color-hairline);
}
.item:hover { text-decoration: none; }
.item .ph { height: 160px; margin-bottom: 12px; background: var(--color-canvas-parchment); box-shadow: var(--product-shadow); }
.item h3 { margin: 0 0 4px; font-size: 17px; font-weight: 600; }
.price { color: var(--color-ink); font-weight: 400; }
.sub { color: var(--color-ink-muted-48); 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); font-size: 14px;
}
.side a.on { color: var(--color-primary); }

.detail { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; padding: 32px 0; }
.detail .ph { height: 360px; background: var(--color-canvas); box-shadow: var(--product-shadow); }
.detail h1 { font-family: var(--font-display); font-size: 40px; font-weight: 600; margin: 0 0 8px; }
.sku { color: var(--color-ink-muted-48); font-size: 14px; margin-bottom: 12px; }
.spec { list-style: none; margin: 0 0 16px; padding: 0; font-size: 17px; }
.spec li { padding: 8px 0; border-bottom: 1px solid var(--color-hairline); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 11px 22px; border: 0; background: var(--color-primary); color: var(--color-on-primary);
  font: inherit; cursor: pointer; border-radius: var(--rounded-pill); margin-right: 8px;
}
.btn:hover { text-decoration: none; color: var(--color-on-primary); }
.btn:active { transform: scale(0.95); }
.btn-line {
  background: transparent; color: var(--color-primary); border: 1px solid var(--color-primary);
}
.btn-line:hover { color: var(--color-primary); }

table { width: 100%; border-collapse: collapse; font-size: 17px; background: var(--color-canvas); border-radius: var(--rounded-lg); }
th, td { border-bottom: 1px solid var(--color-hairline); padding: 14px 12px; text-align: left; }
.qty { width: 56px; padding: 8px 12px; border: 1px solid var(--color-hairline); border-radius: var(--rounded-pill); font: inherit; }

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

.footer { background: var(--color-canvas-parchment); padding: 48px 0 40px; color: var(--color-ink-muted-48); font-size: 12px; }
.footer p { margin: 0 0 4px; }

@media (max-width: 800px) {
  .products { grid-template-columns: repeat(2, 1fr); }
  .layout, .detail { grid-template-columns: 1fr; }
  .section h2, .detail h1 { font-size: 28px; }
}

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