/* メインビジュアル フェード */
.header::before {
  background: #005FBEFF;
  content: "";
  inset: 0;
  opacity: 0;
  position: absolute;
  transition: opacity 0.8s 2s;
  z-index: -1;
}

.is-loaded .header::before {
  opacity: 1;
}

.mv-second {
  inset: auto 0;
  opacity: 0;
  position: absolute;
  transition: opacity 0.8s 2s;
}

.is-loaded .mv-second {
  opacity: 1;
}