.hero .hero-media {
    /*Automne*/
    /*  background-image:url(//s3.amazonaws.com/imagescloud/images/rf/rim/20150825-m.jpg);*/
    /*Été*/
    background-image:url(//s3.amazonaws.com/imagescloud/images/rf/rim/20250219-m.jpg); 
}

@media only screen and (min-width: 768px) {
  .hero .hero-media {
        /*Automne*/
       /*  background-image:url(//s3.amazonaws.com/imagescloud/images/rf/rim/20150825.jpg);*/
        /*Été*/
       background-image:url(//s3.amazonaws.com/imagescloud/images/rf/rim/20250219.jpg); 
    }
}