.top::after {
  background-image: url(/store/miknits/2021/img/pre/04/bg-mv.jpg);
}
@media (min-width: 641px) {
  .top::after {
    background-position: center;
  }
  .top .txt {
    top: 35%;
    left: 50%;
    transform: translatex(-50%);
    width: auto;
  }
  .top .txt h1 {
    align-items: flex-start;
    text-align: left;
  }
  .top .txt h1 span {
    width: auto;
    padding-right: 100vw;
    margin-right: -100vw;
  }
}