#webchat {
    background: url("../images/wechat-qimo.png")no-repeat 50% 50% transparent;
    background-size: auto 100%;
    background-position: center;
    height:98%;
    width:98%;
}
.btn-group {
    width: 65px;
    position: fixed;
    right: 0px;
    bottom: 20%;
    z-index: 1000;
}
.btn-group-bg {
    padding: 4px;
    display: inline-block;
    width: 46px;
    height: 46px;
    background: rgb(25, 202, 166);
    border-radius: 3px;
    z-index: 999;
}