.side-bar a,.chat-tips i {background: url(right_bg.png) no-repeat;} 
.side-bar {width: 66px;position: fixed;bottom: 50px;right: 25px;font-size: 0;line-height: 0;z-index: 100;} 
.side-bar a {width: 66px;height: 66px;display: inline-block;background-color: #ddd;margin-bottom: 2px;} 
.side-bar a:hover {background-color: #669fdd;} 
.side-bar .icon-qq {background-position: 0 -62px;} 
.side-bar .icon-chat {background-position: 0 -130px;position: relative;} 
.side-bar .icon-blog {background-position: 0 -198px;} 
.side-bar .icon-mail {background-position: 0 -266px;} 

.side-bar .icon-chat:hover .chat-tips {display: block;} 
.chat-tips {padding: 20px;border: 1px solid #d1d2d6;position: absolute;right: 78px;top: -55px;background-color: #fff;display: none;} 
.chat-tips i {width: 9px;height: 16px;display: inline-block;position: absolute;right: -9px;top: 80px;background-position:-88px -350px;} 
.chat-tips img {width: 138px;height: 138px;}