.cta {
    display: flex;
    justify-content: center;
    align-items: center;
}


.cta {
    width: 66px;
    height: 66px;
    background: #f1f3f6;
    border-radius: 15px;
    box-shadow: inset 0 0 15px rgba(55, 84, 170, 0), inset 0 0 20px rgba(255, 255, 255, 0), 7px 7px 15px rgba(146, 156, 208, 0.8), -7px -7px 20px white, inset 0px 0px 4px rgba(255, 255, 255, 0.2);
    transition: box-shadow 399ms ease-in-out;
}
@media only screen and (max-width:768px) {
    .cta {
        width: 55px;
        height: 55px;
        border-radius: 10px;
    }
}

    .cta .icon {
        /*color: rgba(146, 156, 208, 10);*/
        color: #4d486b;
        height: 35px;
        width: 35px;
    }

        .cta .icon:hover {
            stroke: #6850e6; /* ÈäÝÔ ÑæÔä */
            filter: drop-shadow(0 0 6px rgba(195, 157, 242, 0.5)) drop-shadow(0 0 10px rgba(255, 255, 255, 0.3));
        }


    .cta:hover {
        box-shadow: inset 7px 7px 15px rgba(146, 156, 208, 0.8), inset -7px -7px 20px white, 0px 0px 4px rgba(255, 255, 255, 0.2);
    }