#section-eleven{
    margin-bottom: 20%;
}
#section-thirteen .rellax{
    margin-top: -60%;
    margin-bottom: 60%;
}
#section-five{
    margin-top: 70%;
}

@media (max-width:600px){
    #section-eleven{
        margin-bottom: 75%;
    }
    #section-thirteen .rellax{
        margin-top: 20%;
        margin-bottom: 10%;
    }
    #section-five.cambio{
        margin-top: 30% !important;
    }
    #section-twelve{
        margin-bottom: 40%;
    }
}

@media (min-width:600px) and (max-width:768px){
    .img-espacio{
        margin-top: -5%;
        margin-bottom: 5%;
    }
}

@media (min-width:768px) and (max-width:992px){
    #section-five{
        margin-top: 80%;
    }
}

@media (min-width:992px) and (max-width:1200px){
    #section-thirteen .rellax{
        margin-top: -30%;
        margin-bottom: 30%;
    }
    #section-five{
        margin-top: 50%;
    }
}

@media (min-width:1400px){
    #section-thirteen .rellax{
        margin-top: -40%;
        margin-bottom: 40%;
    }
}