:root {
  --color-primary: #0a0a0a;
  --color-on-primary: #ffffff;
  --color-brand-coral: #ff5530;
  --color-brand-magenta: #ea5ec1;
  --color-brand-blue: #1456f0;
  --color-brand-blue-deep: #1d4ed8;
  --color-brand-purple: #a855f7;
  --color-canvas: #ffffff;
  --color-surface: #f7f8fa;
  --color-hairline: #e5e7eb;
  --color-ink: #0a0a0a;
  --color-charcoal: #222222;
  --color-steel: #5f5f5f;
  --color-muted: #a8aab2;
  --color-footer-bg: #0a0a0a;
  --rounded-md: 8px;
  --rounded-xl: 16px;
  --rounded-hero: 32px;
  --rounded-full: 9999px;
  --font: "DM Sans", system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { background: var(--color-surface); }
body {
  margin: 0 auto;
  max-width: 390px;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--color-ink);
  background: var(--color-canvas);
  line-height: 1.5;
  padding-bottom: 64px;
}
a { color: var(--color-brand-blue-deep); text-decoration: none; }

.promo {
  background: var(--color-primary);
  color: var(--color-on-primary);
  font-size: 12px;
  font-weight: 500;
  text-align: center;
  padding: 10px 16px;
}
.top {
  border-bottom: 1px solid var(--color-hairline);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-canvas);
}
.logo { font-weight: 600; color: var(--color-ink); }
.back { font-size: 12px; color: var(--color-steel); }

.hero { padding: 32px 16px 24px; text-align: center; }
.hero h1 {
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -0.5px;
  line-height: 1.15;
  margin: 0 0 8px;
}
.hero p { margin: 0 0 16px; color: var(--color-steel); font-size: 14px; }
.btn {
  display: inline-flex;
  background: var(--color-primary);
  color: var(--color-on-primary);
  font-size: 14px;
  font-weight: 600;
  padding: 11px 24px;
  border-radius: var(--rounded-full);
}
.btn:hover { text-decoration: none; color: var(--color-on-primary); }

.block { padding: 16px; border-top: 1px solid var(--color-hairline); }
.block h2 { font-size: 15px; font-weight: 600; margin: 0 0 12px; }

.swatch {
  display: block;
  border-radius: var(--rounded-hero);
  padding: 20px;
  color: #fff;
  margin-bottom: 8px;
  min-height: 88px;
}
.swatch h3 { margin: 0 0 4px; font-size: 22px; }
.swatch p { margin: 0; font-size: 13px; opacity: 0.85; }
.s-coral { background: var(--color-brand-coral); }
.s-magenta { background: var(--color-brand-magenta); }
.s-blue { background: var(--color-brand-blue); }
.s-purple { background: var(--color-brand-purple); }

.cell {
  display: block;
  border: 1px solid var(--color-hairline);
  padding: 12px;
  margin-bottom: 8px;
  color: var(--color-ink);
  border-radius: var(--rounded-xl);
}
.cell:hover { text-decoration: none; }
.cell h3 { margin: 0 0 4px; font-size: 15px; }
.cell p { margin: 0; color: var(--color-steel); font-size: 13px; }

.row {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-hairline);
  font-size: 14px;
}
.row:last-child { border-bottom: 0; }
.row span { color: var(--color-steel); }

.ph {
  background: var(--color-surface);
  color: var(--color-muted);
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  margin-bottom: 12px;
  border-radius: var(--rounded-hero);
}

form label { display: block; margin: 0 0 4px; font-size: 14px; }
form input, form textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--color-hairline);
  font: inherit;
  margin-bottom: 12px;
  border-radius: var(--rounded-md);
  height: 44px;
}
form textarea { height: auto; }
form input:focus, form textarea:focus {
  outline: none;
  border: 2px solid var(--color-brand-blue-deep);
}
form button {
  width: 100%;
  padding: 12px;
  border: 0;
  background: var(--color-primary);
  color: var(--color-on-primary);
  font: inherit;
  font-weight: 600;
  border-radius: var(--rounded-full);
}

.tab {
  position: fixed;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 100%;
  max-width: 390px;
  display: flex;
  border-top: 1px solid var(--color-hairline);
  background: var(--color-canvas);
  padding: 6px 8px 10px;
}
.tab a {
  flex: 1;
  text-align: center;
  padding: 8px 0;
  font-size: 11px;
  font-weight: 500;
  color: var(--color-steel);
  border-radius: var(--rounded-full);
}
.tab a.on { color: var(--color-on-primary); background: var(--color-primary); }

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