:root {
  --color-primary: #1c69d4;
  --color-primary-active: #0653b6;
  --color-ink: #262626;
  --color-body: #3c3c3c;
  --color-muted: #6b6b6b;
  --color-hairline: #e6e6e6;
  --color-hairline-strong: #cccccc;
  --color-canvas: #ffffff;
  --color-surface-soft: #f7f7f7;
  --color-surface-card: #fafafa;
  --color-on-primary: #ffffff;
  --font: "BMW Type Next Latin", system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --rounded-none: 0px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--color-body);
  background: var(--color-canvas);
  line-height: 1.55;
  font-size: 16px;
  font-weight: 300;
}
a { color: var(--color-ink); text-decoration: none; }
a:hover { color: var(--color-primary); }
.wrap { max-width: 1440px; margin: 0 auto; padding: 0 24px; }

.header { background: var(--color-canvas); border-bottom: 1px solid var(--color-hairline); 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-ink); font-size: 18px; letter-spacing: 0.5px; }
.logo:hover { text-decoration: none; color: var(--color-ink); }
.search { flex: 1; min-width: 200px; display: flex; }
.search input {
  flex: 1; padding: 14px 16px; height: 48px;
  border: 1px solid var(--color-hairline); border-right: 0; font: inherit; border-radius: 0;
}
.search button {
  padding: 14px 24px; border: 0; background: var(--color-primary); color: var(--color-on-primary);
  font: inherit; font-weight: 700; letter-spacing: 0.5px; cursor: pointer;
}
.links { display: flex; gap: 16px; font-size: 13px; font-weight: 400; letter-spacing: 0.3px; }
.links a { color: var(--color-ink); }

.nav { border-bottom: 1px solid var(--color-hairline); }
.nav-inner { display: flex; flex-wrap: wrap; gap: 4px 24px; padding: 8px 24px; }
.nav a { color: var(--color-ink); font-size: 14px; letter-spacing: 0.3px; }
.nav a.on { color: var(--color-primary); font-weight: 700; }

.hero { padding: 24px 0; }
.ph {
  background: var(--color-surface-card); color: var(--color-muted);
  display: flex; align-items: center; justify-content: center; font-size: 13px;
}
.banner { height: 200px; }

.section { padding: 48px 0; }
.section h2 { font-size: 24px; font-weight: 700; color: var(--color-ink); margin: 0 0 16px; }

.cats { display: flex; flex-wrap: wrap; gap: 0; }
.cats a {
  border: 1px solid var(--color-hairline-strong); padding: 8px 14px;
  color: var(--color-ink); font-size: 12px; letter-spacing: 0.5px; margin-right: -1px;
}
.cats a:hover { text-decoration: none; background: var(--color-ink); color: var(--color-on-primary); }

.products { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.item { color: var(--color-ink); }
.item:hover { text-decoration: none; }
.item .ph { height: 140px; margin-bottom: 12px; }
.item h3 { margin: 0 0 4px; font-size: 16px; font-weight: 700; }
.price { color: var(--color-ink); font-weight: 700; }
.sub { color: var(--color-muted); font-size: 12px; letter-spacing: 0.5px; }

.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 { font-weight: 700; color: var(--color-primary); }

.detail { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; padding: 32px 0; }
.detail .ph { height: 320px; }
.detail h1 { font-size: 32px; font-weight: 700; color: var(--color-ink); margin: 0 0 8px; }
.sku { color: var(--color-muted); font-size: 12px; letter-spacing: 0.5px; margin-bottom: 12px; }
.spec { list-style: none; margin: 0 0 16px; padding: 0; font-size: 16px; font-weight: 300; }
.spec li { padding: 8px 0; border-bottom: 1px solid var(--color-hairline); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 32px; height: 48px; border: 0;
  background: var(--color-primary); color: var(--color-on-primary);
  font: inherit; font-weight: 700; letter-spacing: 0.5px; cursor: pointer; margin-right: 8px;
}
.btn:hover { text-decoration: none; color: var(--color-on-primary); }
.btn-line {
  background: var(--color-canvas); color: var(--color-ink); border: 1px solid var(--color-hairline-strong);
}
.btn-line:hover { 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; }
.qty { width: 56px; padding: 8px; border: 1px solid var(--color-hairline); font: inherit; }

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

.footer { background: var(--color-surface-soft); padding: 48px 0 40px; color: var(--color-muted); font-size: 13px; font-weight: 300; }
.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; }