.so cial_share_privacy_area .mail a {
text-indent: -9999em;
overflow: hidden;
}
.so cial_share_privacy_area.line .mail a {
display: inline-block;
width: 43px;
height: 20px;
margin-right: 20px;
background: url(../images/mail.png) top left no-repeat transparent;
}
.so cial_share_privacy_area.box .mail a {
display: block;
margin: auto;
width: 58px;
height: 39px;
background: url(../images/mail_box.png) top left no-repeat transparent;
}