.background_phone{
    position: fixed;
    right: 2%;
    bottom: 45px;
    transition: all 0.3s;
    z-index: 99999;

}

.img_phone{
    width: 100%;
    max-width: 180px;
}

.phone_sticky{
    overflow: hidden;
}

.effet{
    animation: drop-in 1s ease 200ms backwards;
}

@keyframes drop-in {
    from {
     opacity: 0;
     transform: translateY(-800px);
    }
    to {
     opacity: 1;
     transform: translate(0px);
    }
   }

   @media (max-width: 768px) { 

    .phone_sticky{
        display: none;
    }
   }