.mt_40{
    margin-top: 40px !important;
}
.mt_50{
    margin-top: 50px !important;
}
.mb_0{
    margin-bottom: 0 !important;
}

.img_01{
    width: 90%;
}
.img_02{
    width: 90%;
}
.img_03{
    width: 90%;
}
.img_04{
    width: 90%;
}
@media screen and (min-width: 768px){
   .img_01{
       width: 55%;
   }
   .img_02{
       width: 60%;
   }
   .img_03{
       width: 60%;
   }
   .img_04{
       width: 55%;
   }
}