.accueil_public {
    position: relative;
}

.accueil_public img {
    width: 70%;
}

.accueil_public a {
    position: relative;
    top: -30px;
    left: 0px;
    display: block;
    width: 130px!important;
    height: unset;
    padding: 1.0em;
    border-radius: unset;
    background-image: unset;
    background-color: #004FEE;
    color: white;
    text-shadow: unset;
}

.accueil_public a:hover {
    color: aqua;
}

/* Affichage sur écran large */
@media all and (min-width: 768px) { 
    .accueil_public a {
        top: -100px;
        left: 150px;
    }
}