.hero .hero-media {
    /* Automne */
    /*background-image:url(//s3.amazonaws.com/imagescloud/images/rf/por/20150825-m.jpg);*/
    /* Été */
   /* background-image:url(//s3.amazonaws.com/imagescloud/images/rf/por/20200326-m.jpg);*/
    /*Hiver */
    background-image:url(//s3.amazonaws.com/imagescloud/images/rf/por/20141205-m.jpg);
}

@media only screen and (min-width: 768px) {
  .hero .hero-media {
    /* Automne */
   /* background-image:url(//s3.amazonaws.com/imagescloud/images/rf/por/20150825.jpg);*/
    /* Été */
   /* background-image:url(//s3.amazonaws.com/imagescloud/images/rf/por/20200326.jpg);*/
    /* Hiver */
   background-image:url(//s3.amazonaws.com/imagescloud/images/rf/por/20141205.jpg);
}
}