body {
    text-align: center;
}

#presentation {
    margin-top: 6%;
    margin-bottom: 6%;
    justify-content: center;
    display: block;
}

#syspertec_logo {
    width: 422px;
    height: 129px;
    justify-content: center;
    max-width: 92%;
}

#missions-centrer {
    display: flex;
    justify-content: space-around;
    text-align: center;
}

#missions {
    font-size: 120%;
    display: flex;
}

#imgcontour {
    margin-top: 10px;
    margin-left: 10px;
    margin-right: 10px;
    display: flex;
    border: 0.175rem solid;
    color: black;
}

#div1 {
    border: solid 2px red;
    position: absolute;
    top: 0px;
    overflow: hidden;
}

#img1 {
    position: absolute;
}

#infra_reseau {
    width: 600px;
    height: 800px;
    max-width: 60%;
}