.reseau_national {
    display: block;
    float: left;
    position: relative;
    overflow: hidden;
    max-width: 120px;
    z-index: 200;
}

.rtl .reseau_national {
    float: right;
}

.reseau_national span {
    padding: .3em .6em;
    display: inline-block;
    white-space: nowrap;
}

.reseau_national ul {
    position: absolute;
    top: 0;
    left: 0;
    min-width: 300px;
    margin: 1.8em 0 0 0;
    z-index: 200;
    height: 0;
    -webkit-transition: all .5s ease-in-out;
    -moz-transition: all .5s ease-in-out;
    -o-transition: all .5s ease-in-out;
    -ms-transition: all .5s ease-in-out;
    transition: all .5s ease-in-out;
    -moz-box-shadow: 3px 3px 4px rgba(0, 0, 0, .25);
    -webkit-box-shadow: 3px 3px 4px rgba(0, 0, 0, .25);
    box-shadow: 3px 3px 4px rgba(0, 0, 0, .25);
}

.reseau_national ul li a {
    padding: .8em 1em;
    display: block;
}

.reseau_national:hover {
    overflow: visible;
}

.reseau_national:hover ul {
    height: auto;
}