/*
Octagon is here.
*/
body:after { /*擬似要素をつくる*/
  position: fixed; /*固定配置*/
  top: 0;
  left: 0; /*左上に固定*/
  width: 100%;
  height: 100%; /*画面全体を覆う*/
  content: "";
  /*冬カラー2025(ダスティーピンク)*/
  background: linear-gradient(135deg, #cfb5ce, #995295);
  background-size: 100% 100%;
  animation: GradientBackground 10s ease infinite;
  /*水色2025-パープル*/
  /*background: linear-gradient(135deg, #34d6ff , #ba87e4);
background-size: 100% 100%;
  animation: GradientBackground 10s ease infinite;*/
  /*冬カラー（緑）*/
  /*background: linear-gradient(135deg, #299d70, #152f28);*/
  /*冬カラー（モスグリーン）*/
  /*background: linear-gradient(135deg, #779359, #364227);
  background-size: 150% 150%;
  animation: GradientBackground 10s ease infinite;
	*/
}
@keyframes GradientBackground {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}
.mainvisual-box::before {
  /*ブルーグレー＆グレー background: linear-gradient(135deg, #34d6ff , #ba87e4);*/
  opacity: 0.25;
}