.about_container{
    max-width: 1024px; 
    margin: 0 auto;
}

.about_img{
    float: right; 
    margin-left: 40px; 
    margin-bottom: 40px; 
    width: 250px;
}

@media (max-width:991px){
    .about_container{
        padding: 0 20px;
    }

    .about_img{
        float: none; 
        margin: 0 auto 30px auto;
        width: 250px;
    }
}