.phone-button {
    position: fixed;
    right: 13px;
    bottom: 90px;
    transform: translate(-50%, -50%);
    background: #00BFFF;
    border-radius: 50%;
    width: 55px;
    height: 55px;
    color: #fff;
    text-align: center;
    line-height: 55px;
    font-size: 30px;
    z-index: 9999;
}
.phone-button a {
    color: #fff;
}
.phone-button:before,
.phone-button:after {
    content: " ";
    display: block;
    position: absolute;
    border: 50%;
    border: 1px solid #00BFFF;
    left: -20px;
    right: -20px;
    top: -20px;
    bottom: -20px;
    border-radius: 50%;
    animation: animate 1.5s linear infinite;
    opacity: 0;
    backface-visibility: hidden; 
}
.phone-button:after{
    animation-delay: .5s;
}
.phone-button i {
        color:#fff;
        transition:.3s;
        animation: 1200ms ease 0s normal none 1 running shake;
        animation-iteration-count: infinite;
}
@keyframes animate
{
    0%
    {
        transform: scale(0.5);
        opacity: 0;
    }
    50%
    {
        opacity: 1;
    }
    100%
    {
        transform: scale(1.2);
        opacity: 0;
    }
}
@keyframes shake {
0% {
    transform: rotateZ(0deg);
        -ms-transform: rotateZ(0deg);
        -webkit-transform: rotateZ(0deg);
}
10% {
    transform: rotateZ(-30deg);
        -ms-transform: rotateZ(-30deg);
        -webkit-transform: rotateZ(-30deg);
}
20% {
    transform: rotateZ(15deg);
        -ms-transform: rotateZ(15deg);
        -webkit-transform: rotateZ(15deg);
}
30% {
    transform: rotateZ(-10deg);
        -ms-transform: rotateZ(-10deg);
        -webkit-transform: rotateZ(-10deg);
}
40% {
    transform: rotateZ(7.5deg);
        -ms-transform: rotateZ(7.5deg);
        -webkit-transform: rotateZ(7.5deg);
}
50% {
    transform: rotateZ(-6deg);
        -ms-transform: rotateZ(-6deg);
        -webkit-transform: rotateZ(-6deg);
}
60% {
    transform: rotateZ(5deg);
        -ms-transform: rotateZ(5deg);
        -webkit-transform: rotateZ(5deg);
}
70% {
    transform: rotateZ(-4.28571deg);
        -ms-transform: rotateZ(-4.28571deg);
        -webkit-transform: rotateZ(-4.28571deg);
}
80% {
    transform: rotateZ(3.75deg);
        -ms-transform: rotateZ(3.75deg);
        -webkit-transform: rotateZ(3.75deg);
}
90% {
    transform: rotateZ(-3.33333deg);
        -ms-transform: rotateZ(-3.33333deg);
        -webkit-transform: rotateZ(-3.33333deg);
}
100% {
    transform: rotateZ(0deg);
        -ms-transform: rotateZ(0deg);
        -webkit-transform: rotateZ(0deg);
}
}
@media (max-width : 800px) {  
.phone-button {   
    bottom: 20px; /*отступ кнопки снизу от экрана*/
    right: 20px; /*отступ кнопки слева от экрана(right - справа)*/
  }
}
.phone-button i {
        color:#fff;
        transition:.3s;
        animation: 1200ms ease 0s normal none 1 running shake;
        animation-iteration-count: infinite;
}