.image {
    background-image: url('../image/white ambulances.jpg') !important;
    background-repeat: no-repeat;
     content: "";
      background-size: contain;
       background-position: center; 
  background-size: cover;
      top: 0px;
      right: 0px;
      bottom: 0px;
      left: 0px;
      /*acity: 0.20;*/
      z-index: -3;

}
li.nav-link ul{
      display: none;
      position: absolute;
      background-color: #4bb5d8;
      min-width: 160px;
      box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
      padding: 12px 16px;
      z-index: 1;
}

li.nav-link:hover ul {
display: block;
}

@media (max-width: 960px) { 
      #generate-section-3, .image {
            background-image: none !important; 
      }
}