#clockdiv {

 text-align: left;

}
* 回到首页 */

#btn_home {

 width: 40px;

 height: 40px;

 display: block;

 position: fixed;

 left: 67%;

 bottom: 200px;

 background: url("https://files.cnblogs.com/files/siwuxie095/home.bmp" )no-repeat left top;

}

  

/* 刷新页面 */

#btn_refresh {

 width: 40px;

 height: 40px;

 display: block;

 position: fixed;

 left: 67%;

 bottom: 160px;

 background: url("https://files.cnblogs.com/files/siwuxie095/refresh.bmp" )no-repeat left top;
#clockdiv {

 text-align: left;

}


}

  

/* 关注博主 */

#btn_follow {

 width: 40px;

 height: 40px;

 display: block;

 position: fixed;

 left: 67%;

 bottom: 120px;

 background: url("https://files.cnblogs.com/files/siwuxie095/follow.bmp" )no-repeat left top;

}

  

/* 邮件联系 */

#btn_at {

 width: 40px;

 height: 40px;

 display: block;

 position: fixed;

 left: 67%;

 bottom: 80px;

 background: url("https://files.cnblogs.com/files/siwuxie095/at.bmp" )no-repeat left top;

}

  

/* 回到顶部 */

#btn_top {

 width: 40px;

 height: 40px;

 display: none;

 position: fixed;

 left: 67%;

 bottom: 40px;

 background: url("https://files.cnblogs.com/files/siwuxie095/top.bmp" )no-repeat left top;

}