#face_enigme_1:hover + div span:nth-child(1) {
    display: none;
}
#face_enigme_1:hover + div span:nth-child(2) {
    display: block !important;
}
#bulle_content_1 {
    width: 100%;
    text-align: center;
    position: absolute;
    top: 85px;
    left: 0px;
    font-size: 24px;
}
#content_enigme_1 {
    zoom:1;
    height:350px;
    position: relative; 
    display: inline-block;
}
@media(max-width: 720px) {
    #content_enigme_1 {
        zoom:0.7;
        height:300px;
    }
}