.field.field-name-field-upload-image.field-type-image.field-label-hidden:last-child .field-items{
  line-height: 0;       
  -webkit-column-count: 4;    
  -webkit-column-gap: 0px;    
  -moz-column-count: 4;
  -moz-column-gap: 0px;
  column-count: 4;    
  column-gap: 0px;
  display:inline-block !important;    
  margin-right: auto;    
  margin-left: auto;  
}
.field.field-name-field-upload-image.field-type-image.field-label-hidden:last-child .field-items img{
  width: 100% !important; 
}
@media (max-width: 1000px) {
   .field.field-name-field-upload-image.field-type-image.field-label-hidden:last-child .field-items {
   -moz-column-count:    3;
   -webkit-column-count: 3;
   column-count:         3;
   }
  }  
@media (max-width: 800px) {
  .field.field-name-field-upload-image.field-type-image.field-label-hidden:last-child .field-items {
   -moz-column-count:    2;
   -webkit-column-count: 2;
   column-count:         2;
   }
  }  
@media (max-width: 400px) {
   .field.field-name-field-upload-image.field-type-image.field-label-hidden:last-child .field-items {
   -moz-column-count:    1;
   -webkit-column-count: 1;
    column-count:        1;
   }
  }