.desctop{
    display: block;
}
.mobile{
    display: none;
}

@media(max-width: 768px){
    .desctop{
        display: none;
    }
    .mobile{
        display: block;

        margin: 0 auto;
    }
    .bannder_index{
        padding-left: 16px;
        padding-right: 16px;
        position: relative;
        top: 30px;
    }
}