@media (max-width: 599px) {
    .cmm-div {
        z-index: 997;
        position: fixed;
        bottom: 0;
        width: 100%;
    }

    .cmm-div button {
        width: 100%;
    }

    .cmm-div button span img {
        width: 32px;
        height: 32px;
        margin: 0 10px 0 0;
    }

    .cmm-div button span {
        font-size: 14px;
        font-weight: normal;
        margin: 0 5px 0 0;
    }
}

/* min = sm */
@media (min-width: 600px) {
    .cmm-div {
        z-index: 997;
        position: fixed;
    }

    .cmm-div button {
        width: 80px;
        height: 80px;
        padding: 2px;
    }

    .cmm-div button span img {
        width: 32px;
        height: 32px;
    }

    .cmm-div button span {
        font-size: 14px;
        font-weight: normal;
        padding: 2px;
    }
}

.cmm-btn {
    line-height: normal;
}