.heading {
    margin-bottom: 50px;
}
.padding-top-150 {
    padding-top: 70px !important;
}
@media only screen and (max-width: 750px) {
    .contain_item{
        justify-content: center;
        flex-direction:column;
    }
    .contain_item li{
        margin-bottom:10px;
    }
}