.about_box1{
    margin-top: 46px;
    text-align: center;
}
.about_box{
    margin-top: 136px;
    background-color: white;
  
}
.about_box3{
    margin-top: 30px;

}

@media  screen and (max-width: 768px) {
    .about{
       margin-top: -320px;
    }
    .about_box{
        margin-top: 0px;
      
      
    }
 }