@media (max-width: 992px) {
    .container {
        width:75%;
    }
    .fomulario{
        margin-top: 35px;
    }
    .imagen{
        margin-top: 20px;
    } 
}

@media (min-width: 992px) {
    .container {
        margin-top: 25px;
        width:350px;
        border-radius: 25px;
        border: 6px solid #337ab7;
        padding: 20px; 
    }
    .fomulario{
        margin-top: 50px;
        margin-bottom: 20px;
    }
    .imagen{
        margin-top: 35px;
    } 
}   
.imagen{
    width: 70%;
    margin-left: 15%;
    margin-right: 15%;
}