#ban .swiper-slide {
  height: 100vh;
  max-height: 1080px;
  background-color: #000;
  background-position: center;
  background-repeat: no-repeat;
  -webkit-background-size: cover;
  -ms-background-size: cover;
  -o-background-size: cover;
  -moz-background-size: cover;
  background-size: cover;
}
@media screen and (max-width: 1440px) {
  #ban .swiper-slide {
    height: calc(1080 / 1920 * 100vw);
    -webkit-background-size: cover;
    -ms-background-size: cover;
    -o-background-size: cover;
    -moz-background-size: cover;
    background-size: cover;
  }
}
@media screen and (max-width: 750px) {
  #ban .swiper-slide {
    height: calc(1080 / 750 * 100vw);
  }
}
#ban .ban_txt {
  z-index: 2;
}
.searchForm {
  flex-direction: column;
  -ms-flex-direction: column;
}