.ds-card {
  background: var(--ds-color-surface);
  border: 1px solid var(--ds-color-border);
  border-radius: var(--ds-radius-lg);
  box-shadow: var(--ds-shadow-card);
  padding: var(--ds-space-6);
}
.ds-card-warning { border-color: #b45309; background: #fff7ed; }
.ds-card-contact { display: grid; gap: var(--ds-space-3); }
.ds-card-spec { border-left: 8px solid var(--ds-color-primary); }
.ds-card-marketing { background: linear-gradient(135deg, var(--ds-color-surface), var(--ds-color-background)); }