  height: 20px;
        }

        .card-bg .r {
            position: absolute;
            width: 300px;
            height: 300px;
            border-radius: 50%;
        }
        .card-bg .r:nth-child(odd) {
            -webkit-animation: floating 7s infinite;
            animation: floating 7s infinite;
        }

        .card-bg .r:nth-child(even) {
            -webkit-animation: floating 9s infinite;
            animation: floating 9s infinite;
        }

        .btn-primary {
            color: #