:root {
  --color-primary: #0064e0;
  --color-primary-deep: #0457cb;
  --color-on-primary: #ffffff;
  --color-ink-button: #000000;
  --color-on-ink-button: #ffffff;
  --color-fb-blue: #1876f2;
  --color-success: #31a24c;
  --color-warning: #f7b928;
  --color-canvas: #ffffff;
  --color-surface-soft: #f1f4f7;
  --color-ink-deep: #0a1317;
  --color-ink: #1c1e21;
  --color-charcoal: #444950;
  --color-steel: #5d6c7b;
  --color-stone: #8595a4;
  --color-hairline: #ced0d4;
  --color-hairline-soft: #dee3e9;
  --rounded-lg: 8px;
  --rounded-xl: 16px;
  --rounded-xxxl: 32px;
  --rounded-full: 100px;
  --font: "Optimistic VF", system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--color-ink);
  background: var(--color-canvas);
  line-height: 1.5;
  letter-spacing: -0.16px;
}
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1280px; margin: 0 auto; padding: 0 32px; }

.promo {
  background: var(--color-warning);
  color: var(--color-ink-deep);
  text-align: center;
  font-size: 14px;
  font-weight: 700;
  padding: 10px 24px;
}

.header { border-bottom: 1px solid var(--color-hairline-soft); padding: 12px 0; }
.header-inner { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.logo {
  font-weight: 700;
  color: var(--color-ink-deep);
  font-size: 18px;
  font-feature-settings: "ss01", "ss02";
}
.logo:hover { text-decoration: none; }
.search { flex: 1; min-width: 200px; display: flex; }
.search input {
  flex: 1;
  height: 40px;
  padding: 8px 16px;
  border: 0;
  background: var(--color-surface-soft);
  color: var(--color-steel);
  font: inherit;
  font-size: 14px;
  border-radius: var(--rounded-full) 0 0 var(--rounded-full);
}
.search button {
  padding: 8px 18px;
  border: 0;
  background: var(--color-ink-button);
  color: var(--color-on-ink-button);
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  border-radius: 0 var(--rounded-full) var(--rounded-full) 0;
  height: 40px;
}
.links { display: flex; gap: 12px; font-size: 13px; }
.links a { color: var(--color-ink); font-weight: 700; }

.nav { border-bottom: 1px solid var(--color-hairline-soft); }
.nav-inner { display: flex; flex-wrap: wrap; gap: 8px; padding: 12px 32px; }
.nav a {
  color: var(--color-ink);
  font-size: 14px;
  font-weight: 700;
  padding: 8px 16px;
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-full);
}
.nav a:hover { text-decoration: none; }
.nav a.on {
  background: var(--color-ink-deep);
  color: var(--color-canvas);
  border-color: var(--color-ink-deep);
}

.hero { padding: 24px 0; }
.ph {
  background: var(--color-surface-soft);
  color: var(--color-stone);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  border-radius: var(--rounded-xxxl);
}
.banner { height: 220px; }

.section { padding: 40px 0; }
.section h2 {
  font-size: 28px;
  font-weight: 300;
  margin: 0 0 20px;
  color: var(--color-ink-deep);
  font-feature-settings: "ss01", "ss02";
}

.cats { display: flex; flex-wrap: wrap; gap: 8px; }
.cats a {
  border: 1px solid var(--color-hairline);
  padding: 8px 16px;
  color: var(--color-ink);
  font-size: 14px;
  font-weight: 700;
  border-radius: var(--rounded-full);
}
.cats a:hover { text-decoration: none; background: var(--color-ink-deep); color: var(--color-canvas); }

.products { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.item {
  border: 1px solid var(--color-hairline-soft);
  padding: 16px;
  color: var(--color-ink);
  border-radius: var(--rounded-xxxl);
}
.item:hover { text-decoration: none; }
.item .ph { height: 140px; margin-bottom: 12px; border-radius: var(--rounded-xl); }
.item h3 { margin: 0 0 4px; font-size: 16px; font-weight: 700; }
.price { color: var(--color-ink-deep); font-weight: 700; }
.sub { color: var(--color-steel); font-size: 12px; }

.layout { display: grid; grid-template-columns: 200px 1fr; gap: 24px; padding: 24px 0; }
.side a {
  display: block;
  padding: 10px 16px;
  color: var(--color-ink);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-full);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
}
.side a.on { background: var(--color-ink-deep); color: var(--color-canvas); border-color: var(--color-ink-deep); }

.detail { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 32px; padding: 32px 0; }
.detail .ph { height: 420px; }
.detail h1 {
  font-size: 36px;
  font-weight: 500;
  margin: 0 0 8px;
  font-feature-settings: "ss01", "ss02";
}
.sku { color: var(--color-steel); font-size: 13px; margin-bottom: 12px; }
.spec { list-style: none; margin: 0 0 16px; padding: 0; font-size: 14px; }
.spec li { padding: 10px 0; border-bottom: 1px solid var(--color-hairline-soft); }
.btn {
  display: inline-block;
  padding: 14px 30px;
  border: 0;
  background: var(--color-primary);
  color: var(--color-on-primary);
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  margin-right: 8px;
  border-radius: var(--rounded-full);
}
.btn:hover { text-decoration: none; color: var(--color-on-primary); background: var(--color-primary-deep); }
.btn-line {
  background: transparent;
  color: var(--color-ink-deep);
  border: 2px solid var(--color-ink-deep);
}
.btn-line:hover { color: var(--color-ink-deep); background: var(--color-surface-soft); }

.checkout {
  border: 1px solid var(--color-hairline-soft);
  border-radius: var(--rounded-xl);
  padding: 24px;
  box-shadow: rgba(20, 22, 26, 0.3) 0px 1px 4px 0px;
}

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

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

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

@media (max-width: 800px) {
  .wrap, .nav-inner { padding-left: 16px; padding-right: 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; }