.collapse-close span {
    display:block;
    float:right;
    background:url(img/arrow-down.png) center center no-repeat;
    padding:10px;
}
.collapse-open span {
    display:block;
    float:right;
    padding:10px;
}


.collapse-open span {
    background:url(img/arrow-up.png) center center no-repeat;
}

.collapse-open {
    background:#03224c !important;
    color: #fff;
}

.collapse-open-these {
    background:#506232 !important;
    color: #fff;
}


.collapse-open-labo {
    background: #03224c!important;
    color: #fff;
}


.collapse-open-brevet {
    background:#606060 !important;
    color: #fff;
}

.collapse-open-unite {
    background: #0073aa !important;
    color: #fff;
}