/* 左へ流れつづける写真の帯（大1枚＋小4枚＋大1枚をくり返す） */
.band { margin-top: 150px; overflow-x: clip; }
.band__track { display: flex; width: max-content; animation: band 60s linear infinite; }
.band__set { display: flex; flex: none; }
.band__big { width: 500px; height: 500px; padding: 5px; }
.band__quad { display: grid; grid-template-columns: 240px 240px; grid-template-rows: 240px 240px; gap: 10px; width: 500px; height: 500px; padding: 5px; }
.band .ph { border-radius: var(--r-m); }
@keyframes band { to { transform: translateX(-50%); } }
.is-capture .band__track { animation: none; }

@media (max-width: 899px) {
  .band__big { width: 360px; height: 360px; }
  .band__quad { grid-template-columns: 170px 170px; grid-template-rows: 170px 170px; width: 360px; height: 360px; }
}
@media (prefers-reduced-motion: reduce) {
  .band__track { animation: none; }
}