@media screen and (min-width: 768px) {
  html {
    overflow-x: inherit !important;
    overflow-y: inherit !important;
  }

  .fixed_adjust {
    padding-top: 0;
  }
  header {
    transition: all 0.3s ease !important;
  }
  header .header_nav {
    background: transparent;
  }

  header.is-top {
    background: rgba(255, 255, 255, 0);
    border-color: transparent;
  }
  header.is-top:after {
    content: '';
    position: absolute;
    top: 0;
    left: -50%;
    display: block;
    width: 200%;
    height: 200%;
    box-shadow: inset 0 50px 50px rgba(0, 0, 0, 0.1);
    z-index: -1;
  }

  header.is-top .header_nav > ul > li > a {
    color: white;
    text-shadow: -2px 2px 10px rgba(0, 0, 0, 0.2), 1px 1px 3px rgba(0, 0, 0, 0.5), 0 0 2px rgba(0, 0, 0, 0.8);
  }
  .mainvisual .mv_logo {
    display: none;
  }
}