* {
    margin: 0;
    padding: 0;
}
 
ul li {
    list-style: none;
}
 
.online-service {
    position: fixed;
    bottom: 100px;
    right: 50px;
}
 
#online_list {
    width: 50px;
}
 
#online_list li {
    border-radius: 4px;
    width: 60px;
    height: 60px;
    position: relative;
    background: url(https://www.cqyunkuai.com/images/weixin.svg) no-repeat;
}
 
#online_list li.icon1 {
    background-position: 0 0;
}
 
#online_list li.icon2 {
    background-position: 0 -50px;
}
 
#online_list li.icon3 {
    background-position: 0 -100px;
}
 
#online_list li.icon4 {
    background-position: 0 -150px;
}
 
 
/* css样式实现 */
 
 
/* .online-service #online_list li:hover {
    background-position-x: -50px;
} */
 
 
/* .online-service #online_list li:hover span {
    display: block;
} */
 
#online_list span {
    display: inline-block;
    width: 100px;
    height: 60px;
    background-color: #12ca35;
    position: absolute;
    top: 0;
    left: -100px;
    text-align: center;
    line-height: 60px;
    color: #fff;
    display: none;
	BORDER-RADIUS: 5PX;
	font-size: 18px;
}
#online_list span a {
    color: #fff;
    text-decoration: none;
    font-weight: 550;
}