.bloc_presentation {
    background: url(/Files/App_002/Images/bg_blanc.jpg) no-repeat center;
    background-attachment: fixed;
    background-size: cover;
    min-height: 820px;
    padding-top: 50px;
    padding-bottom: 50px;
}
.bloc_sup_title {
    font-weight: bold;
    color: #555555;
    text-transform: uppercase;
    margin-bottom: 15px;
    margin-top: 60px;
}
.nos_objectifs {
    position: relative;
}
.presentation_motif {
    position: absolute;
    left: -390px;
}


@media (max-width: 992px) {
  .bloc_presentation {padding-top: 30px;padding-bottom: 30px;min-height: auto;}
}

@media (max-width: 769px) {
  .presentation_img {margin: 0 auto 20px auto;}
}