.callback_float {
        position: fixed;
        left: 24px;
        bottom: 104px;
        z-index: 98;
        display: -webkit-box;
        display: -webkit-flex;
        display: -ms-flexbox;
        display: flex;
        width: 64px;
        height: 64px;
        -webkit-box-pack: center;
        -webkit-justify-content: center;
        -ms-flex-pack: center;
        justify-content: center;
        -webkit-box-align: center;
        -webkit-align-items: center;
        -ms-flex-align: center;
        align-items: center;
        /*border: 3px solid rgba(255, 255, 255, 0.3);*/
        border-radius: 50px;
        /*background: rgb(1, 199, 22) none repeat scroll 0% 0%;*/
        background: rgba(0, 0, 0, 0) linear-gradient(95deg, rgb(47, 50, 74) 20%, rgb(66, 72, 103) 80%) repeat scroll 0% 0%;
        -webkit-transition: all 200ms ease;
        transition: all 200ms ease;
        color: #fff;
        text-align: center;
        cursor: pointer;
        box-shadow: 0 12px 14px 8px rgba(0,0,0,.17);
    }