.index_banner{
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100vh;
}
.index_banner .des{
  text-align: center;
}
.index_banner .des span{
  color: var(--green-color);
}
.index_banner >video{
  width: 100%;
  height: 100%;
  -o-object-fit: cover;
     object-fit: cover;
  display: block;
}
.index_banner img {
  width: 100%;
  display: none;
}
.index_banner .txt {
  text-align: center;
  color: #fff;
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
      -ms-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
}
.index_banner .tit {
  margin-top: 30px;
}
.index_banner .same_btn1 {
  background: none;
  border: 1px solid #fff;
}
.index_banner .same_btn1 svg path{
  transition: all 0.5s;
}
.index_banner .same_btn1:hover{
  background: #fff;
  color: var(--primary-color);
}
.index_banner .same_btn1:hover svg path{
  stroke: #0D2014;
}


@media screen and (max-width: 768px){
  .index_banner .txt{
    margin-top: -10%;
  }
  .index_banner .sub{
    font-size: 16px;
    word-spacing: 2px;
  }
  .index_banner .tit{
    font-size: 30px;
    font-weight: bold;
    margin:10% 0;
  line-height: 1.5;

  }
  .index_banner{
    height: calc(100% - 60px);
    margin-top: 60px;
  }
    .index_banner video{
      display: none;
    }
    .index_banner img{
      display: block;
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
}