/* ▼ スクロールフェード用 ▼ */
.fadein {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
  will-change: opacity, transform;
}

.fadein.visible {
  opacity: 1;
  transform: translateY(0);
}