html, body {
  font-size: calc(10 / 1280 * 100vw);
}
@media screen and (max-width: 680px) {
  html, body {
    font-size: calc(10 / 375 * 100vw);
  }
}
body{
  font-family: "Noto Sans JP", "メイリオ", Meiryo, serif;
  min-height: 100vh;
  z-index: 0;
  position: relative;
}
img{
  width: 100%;
  object-fit: cover;
  height: 100%;
}
a{
  color: #000;
}