.wrap{
    height: 100vh;
    width: 100%;
}
.main{
    background: url('../../assets/images/index/banner.png');
    background-size: 100% 100%;
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.wrap .main .content{
    display: flex;
    justify-content: center;
}

.wrap .main .content .banner_desc{
    width: 1089px;
    height: 96px;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
}
.wrap .main .content .download_btn{
    align-self: center;
    display: block;
    width: 282px;
    height: 70px;
    background: url('../images/index/download_btn.png');
    background-size: 100%;
    position: fixed;
    top: 65%;
    left: 50%;
    transform: translate(-50%,-65%); 
}