[data-homepage-ai-summary] > summary {
  background-image: linear-gradient(110deg, #0f172a 10%, #155e75 42%, #1e3a8a 60%, #0f172a 90%);
  background-size: 220% 100%;
  background-position: 0% 50%;
}

@media (prefers-reduced-motion: no-preference) {
  [data-homepage-ai-summary] > summary {
    animation: homepage-ai-gradient 9s ease-in-out infinite;
  }
}

@keyframes homepage-ai-gradient {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}