a.social_facebook{
background:url('//blog.hsdn.net/images/social/social.png') no-repeat 0 0;
background-position: -0px -0px; width: 40px; height: 40px;
margin: 0 5px;
float:left;
display:block;
}

a.social_gooleplus{
background:url('//blog.hsdn.net/images/social/social.png') no-repeat 0 0;
background-position: -0px -50px; width: 40px; height: 40px;
margin: 0 5px;
float:left;
display:block;
}

a.social_linkedin{
background:url('//blog.hsdn.net/images/social/social.png') no-repeat 0 0;
background-position: -0px -100px; width: 40px; height: 40px;
margin: 0 5px;
float:left;
display:block;
}

a.social_rss{
background:url('//blog.hsdn.net/images/social/social.png') no-repeat 0 0;
background-position: -0px -150px; width: 40px; height: 40px;
margin: 0 5px;
float:left;
display:block;
}

a.social_twitter{
background:url('//blog.hsdn.net/images/social/social.png') no-repeat 0 0;
background-position: -0px -200px; width: 40px; height: 40px;
margin: 0 5px;
float:left;
display:block;
}