body {
    background-image: url('../../images/payment.jpg');
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: cover;
    background-color: #464646;
    opacity:.91;
}

@media only screen and (max-width: 767px) {
    body {
        background-image: url('../../Images/payment-mobile.jpg');
    }
}