:root {
  --color-primary: #171717;
  --color-on-primary: #ffffff;
  --color-ink: #171717;
  --color-body: #4d4d4d;
  --color-mute: #888888;
  --color-hairline: #ebebeb;
  --color-canvas: #ffffff;
  --color-canvas-soft: #fafafa;
  --color-canvas-soft-2: #f5f5f5;
  --color-link: #0070f3;
  --color-gradient-develop-start: #007cf0;
  --color-gradient-preview-end: #ff0080;
  --color-gradient-ship-end: #f9cb28;
  --rounded-sm: 6px;
  --rounded-md: 8px;
  --rounded-lg: 12px;
  --rounded-pill: 100px;
  --font: Geist, Inter, system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Geist Mono", ui-monospace, Menlo, system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", monospace;
  --shadow-card: 0 0 0 1px #00000014 inset, 0px 2px 2px #0000000a, 0px 8px 8px -8px #0000000a;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--color-ink);
  background: var(--color-canvas-soft);
  line-height: 1.45;
}
a { color: var(--color-link); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 16px; }

.header {
  background: var(--color-canvas);
  padding: 12px 0;
  border-bottom: 1px solid var(--color-hairline);
}
.header-inner { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.logo { font-weight: 600; color: var(--color-ink); letter-spacing: -0.4px; }
.search { flex: 1; min-width: 200px; display: flex; }
.search input {
  flex: 1;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-sm) 0 0 var(--rounded-sm);
  font: inherit;
  background: var(--color-canvas);
}
.search button {
  height: 40px;
  padding: 0 16px;
  border: 0;
  background: var(--color-primary);
  color: var(--color-on-primary);
  font: inherit;
  font-weight: 500;
  cursor: pointer;
  border-radius: 0 var(--rounded-pill) var(--rounded-pill) 0;
}
.links { display: flex; gap: 12px; font-size: 14px; }
.links a { color: var(--color-body); }

.nav { background: var(--color-canvas); }
.nav-inner { display: flex; flex-wrap: wrap; gap: 4px 8px; padding: 8px 16px; }
.nav a {
  color: var(--color-body);
  font-size: 14px;
  padding: 8px 12px;
  border-radius: 64px;
}
.nav a.on { color: var(--color-ink); background: var(--color-canvas-soft-2); }

.hero { padding: 24px 0; }
.ph {
  background: var(--color-canvas-soft-2);
  color: var(--color-mute);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  border-radius: var(--rounded-md);
}
.banner {
  height: 200px;
  background:
    radial-gradient(closest-side at 20% 40%, var(--color-gradient-develop-start), transparent 70%),
    radial-gradient(closest-side at 80% 40%, var(--color-gradient-preview-end), transparent 70%),
    radial-gradient(closest-side at 50% 90%, var(--color-gradient-ship-end), transparent 70%),
    var(--color-canvas);
  color: var(--color-ink);
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.96px;
}

.section { padding: 24px 0; }
.section h2 { font-size: 24px; font-weight: 600; letter-spacing: -0.96px; margin: 0 0 12px; }

.cats { display: flex; flex-wrap: wrap; gap: 8px; }
.cats a {
  background: var(--color-canvas);
  box-shadow: 0 0 0 1px var(--color-hairline);
  padding: 6px 12px;
  color: var(--color-ink);
  font-size: 13px;
  border-radius: 64px;
}

.products { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.item {
  background: var(--color-canvas);
  border-radius: var(--rounded-md);
  padding: 16px;
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
}
.item:hover { text-decoration: none; }
.item .ph { height: 120px; margin-bottom: 8px; }
.item h3 { margin: 0 0 4px; font-size: 14px; font-weight: 500; }
.price { color: var(--color-ink); font-weight: 600; }
.sub { color: var(--color-mute); font-size: 12px; font-family: var(--font-mono); }

.layout { display: grid; grid-template-columns: 200px 1fr; gap: 24px; padding: 24px 0; }
.side a {
  display: block;
  padding: 8px 0;
  color: var(--color-body);
  border-bottom: 1px solid var(--color-hairline);
  font-size: 14px;
}
.side a.on { color: var(--color-ink); font-weight: 500; }

.detail { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; padding: 24px 0; }
.detail .ph { height: 280px; }
.detail h1 { font-size: 32px; font-weight: 600; letter-spacing: -1.28px; margin: 0 0 8px; }
.sku { color: var(--color-mute); font-family: var(--font-mono); font-size: 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-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 16px;
  border: 0;
  background: var(--color-primary);
  color: var(--color-on-primary);
  font: inherit;
  font-weight: 500;
  cursor: pointer;
  margin-right: 8px;
  border-radius: var(--rounded-pill);
  text-decoration: none;
}
.btn:hover { color: var(--color-on-primary); text-decoration: none; }
.btn-line {
  background: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: 0 0 0 1px var(--color-hairline);
}
.btn-line:hover { color: var(--color-ink); }

table { width: 100%; border-collapse: collapse; font-size: 14px; background: var(--color-canvas); border-radius: var(--rounded-lg); }
th, td { border-bottom: 1px solid var(--color-hairline); padding: 10px 8px; text-align: left; }
th { font-family: var(--font-mono); font-size: 12px; color: var(--color-mute); background: var(--color-canvas-soft); }
.qty { width: 48px; padding: 4px; border: 1px solid var(--color-hairline); border-radius: var(--rounded-sm); }

.user-list { list-style: none; margin: 0; padding: 0; }
.user-list li {
  background: var(--color-canvas);
  box-shadow: var(--shadow-card);
  border-radius: var(--rounded-md);
  padding: 16px;
  margin-bottom: 8px;
}

.footer {
  background: var(--color-canvas);
  border-top: 1px solid var(--color-hairline);
  padding: 40px 0;
  color: var(--color-body);
  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; }