.banner {
  overflow: hidden;
  position: relative;
  color: white;
}
.banner_phone{
    display: none;
}
.banner_img img{
    display: none;
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.banner_img img:first-child{
    display: block;
}
.banner .banner_bg {
  width: 100%;
}
.banner .banner_txt {
  position: absolute;
  left: 50%;
  top: 45%;
  -webkit-transform: translate(-50%, -50%);
      -ms-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
}
.banner .banner_txt > * {
  opacity: 0;
  -webkit-transform: translateY(25px);
      -ms-transform: translateY(25px);
          transform: translateY(25px);
  -webkit-transition: all 1s;
  transition: all 1s;
}
.banner .banner_txt > *:nth-child(1) {
  -webkit-transition-delay: 0.4s;
          transition-delay: 0.4s;
}
.banner .banner_txt > *:nth-child(2) {
  -webkit-transition-delay: 0.6s;
          transition-delay: 0.6s;
}
.banner .banner_txt > *:nth-child(3) {
  -webkit-transition-delay: 0.8s;
          transition-delay: 0.8s;
}
.banner .banner_tit {
  font-weight: 700;
  text-align: center;
}
.banner video {
  width: 100%;
}
.banner .phone_play {
  display: none;
}
.banner .swiper-slide {
  height: 100vh;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
          justify-content: center;
}
.banner.banner_act .banner_txt > * {
  opacity: 1;
  -webkit-transform: none;
      -ms-transform: none;
          transform: none;
}

@media screen and (max-width: 1200px) {
  .banner {
    margin-top: 60px;
  }
}
@media screen and (max-width: 768px) {
  .banner .swiper-slide {
    height: calc(100vh - 60px);
  }
  .banner .banner_bg {
    height: 100%;
    width: auto;
  }
  .banner_phone{
    display: block;
}
.banner_pc{
    display: none;
}
.banner .banner_txt{
    top: 35%;
}
}
@media screen and (max-width: 500px){
    .banner_img{
        height: calc(100vh - 60px);
        display: flex;
        align-items: end;
        justify-content: center;
    }
    .banner_img img{
        height: 100%;
        width: auto;
    }
}