form .submit-button {
    width: 100%;
}

@media only screen and (max-width: 992px) {
    .know-image {
        padding-top: 0px;
    }
    h4,
    h6 {
        text-align: center;
    }
}

@media only screen and (max-width: 768px) {
    form .submit-button {
        width: 30%;
        float: right;
    }
    .vertical {
        visibility: hidden;
    }
}