.kefu-box {
    width: 80px;
    height: 400px;
    background: #0776f5;
    position: fixed;
    right: 20px;
    bottom: 100px;
    text-align: center;
    color: #fff;
    line-height: 40px;
    padding-top: 20px;
    border-radius: 30px;
    font-size: 16px;
}
.item{
    margin-bottom: 20px;
    border-bottom: 1px solid white;
}
.IM,
.gzh,
.phone-tel {
    width: 80px;
    height: 40px;
    line-height: 20px;
}

a{
    text-decoration: none;
}
/* 初始化tooltip为隐藏 */
.phone-num {
    display: none;
    width: 120px;
    background-color: #000;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px ;
    position: fixed;
    right: 80px;
    bottom: 140px;
}

/* 鼠标悬停在按钮上时显示tooltip */
.phone-tel:hover~.phone-num {
    display: block;
}

.phone-tela:hover~.phone-num {
    display: block;
}

/* 初始化tooltip为隐藏 */
.weixin {
    display: none;
    width: 200px;
    background-color: #FFF;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px;
    position: fixed;
    right: 80px;
    bottom: 240px;
}

.gzha:hover~.weixin {
    display: block;
}

.gzh:hover~.weixin {
    display: block;
}