:root {
  --color-primary: #0052ff;
  --color-primary-active: #003ecc;
  --color-ink: #0a0b0d;
  --color-body: #5b616e;
  --color-muted: #7c828a;
  --color-hairline: #dee1e6;
  --color-canvas: #ffffff;
  --color-surface-soft: #f7f7f7;
  --color-surface-strong: #eef0f3;
  --color-surface-dark: #0a0b0d;
  --color-on-primary: #ffffff;
  --color-semantic-up: #05b169;
  --rounded-md: 12px;
  --rounded-xl: 24px;
  --rounded-pill: 100px;
  --font-display: "Coinbase Display", Inter, system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Coinbase Sans", Inter, system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Coinbase Mono", ui-monospace, "Segoe UI", "PingFang SC", "Microsoft YaHei", monospace;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-canvas);
  line-height: 1.5;
}
a { color: var(--color-primary); text-decoration: none; }
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 32px; }

.header { background: var(--color-canvas); padding: 12px 0; }
.header-inner { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; min-height: 64px; }
.logo {
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--color-primary);
  font-size: 22px;
  letter-spacing: -0.4px;
}
.search { flex: 1; min-width: 200px; display: flex; }
.search input {
  flex: 1;
  padding: 12px 20px;
  border: 0;
  background: var(--color-surface-strong);
  border-radius: var(--rounded-pill) 0 0 var(--rounded-pill);
  font: inherit;
  height: 44px;
}
.search button {
  padding: 0 20px;
  border: 0;
  background: var(--color-primary);
  color: var(--color-on-primary);
  font: 600 14px var(--font-body);
  cursor: pointer;
  height: 44px;
  border-radius: 0 var(--rounded-pill) var(--rounded-pill) 0;
}
.links { display: flex; gap: 16px; font-size: 14px; font-weight: 500; }
.links a { color: var(--color-ink); }

.nav { border-top: 1px solid var(--color-hairline); }
.nav-inner { display: flex; flex-wrap: wrap; gap: 8px 24px; padding: 12px 32px; }
.nav a { color: var(--color-ink); font-size: 14px; font-weight: 500; }
.nav a.on { color: var(--color-primary); }

.hero { padding: 24px 0 8px; }
.ph {
  background: #e8eaee;
  color: var(--color-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
}
.banner { height: 200px; border-radius: var(--rounded-xl); }

.section { padding: 40px 0; }
.section h2 {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 400;
  letter-spacing: -0.4px;
  margin: 0 0 20px;
}

.cats { display: flex; flex-wrap: wrap; gap: 8px; }
.cats a {
  background: var(--color-surface-strong);
  padding: 8px 16px;
  color: var(--color-ink);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--rounded-pill);
}

.products { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.item {
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-xl);
  padding: 16px;
  color: var(--color-ink);
  background: var(--color-canvas);
}
.item .ph { height: 140px; margin-bottom: 12px; border-radius: 16px; }
.item h3 { margin: 0 0 6px; font-size: 16px; font-weight: 600; }
.price {
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 18px;
}
.sub { color: var(--color-muted); font-size: 13px; }

.layout { display: grid; grid-template-columns: 220px 1fr; gap: 32px; padding: 32px 0; }
.side a {
  display: block;
  padding: 12px 0;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-hairline);
  font-size: 14px;
  font-weight: 500;
}
.side a.on { color: var(--color-primary); }

.detail { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; padding: 40px 0; }
.detail .ph { height: 320px; border-radius: var(--rounded-xl); }
.detail h1 {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 400;
  letter-spacing: -0.5px;
  margin: 0 0 8px;
}
.sku { color: var(--color-muted); font-size: 13px; margin-bottom: 12px; }
.spec { list-style: none; margin: 0 0 24px; padding: 0; font-size: 14px; }
.spec li { padding: 10px 0; border-bottom: 1px solid var(--color-hairline); }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  height: 44px;
  border: 0;
  background: var(--color-primary);
  color: var(--color-on-primary);
  font: 600 16px var(--font-body);
  cursor: pointer;
  border-radius: var(--rounded-pill);
  margin-right: 8px;
}
.btn-line {
  background: var(--color-surface-strong);
  color: var(--color-ink);
}

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { border-bottom: 1px solid var(--color-hairline); padding: 14px 8px; text-align: left; }
th { font-size: 12px; font-weight: 600; color: var(--color-muted); }
.qty { width: 56px; padding: 8px; border: 1px solid var(--color-hairline); border-radius: var(--rounded-md); }

.user-list { list-style: none; margin: 0; padding: 0; }
.user-list li {
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-xl);
  padding: 16px 20px;
  margin-bottom: 10px;
}

.footer {
  border-top: 1px solid var(--color-hairline);
  padding: 40px 0 48px;
  color: var(--color-body);
  font-size: 13px;
}
.footer p { margin: 0 0 4px; }

@media (max-width: 800px) {
  .wrap { padding: 0 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; }