a.ext span.ext,
a.ext span.mailto {
  display: none;
  padding: 0;
}

a.ext:after {
 background:url(../images/common/linkIcon_site.png) no-repeat center top;
}

a.ext:after {
 margin:0px 5px 0px 5px;
 display:inline-block;
 vertical-align:middle;
 height:1em;
 width:1em;
 content:"";
 background-size:contain;
}

@media screen and (max-width: 768px) {
a.ext:after {
 vertical-align:top;
}

.f-navi li a.ext:after {
 background:none;
 height:auto;
 margin-right: 0px;
 width: 0px;
}
}