/*==============================
　角丸４方向
==============================*/
.rounded{
  border-radius: 4px;
  -webkit-border-radius: 4px;
  -moz-border-radius: 4px;
  -webkit-transition: border-color .5s;
  -moz-transition: border-color .5s;
  -o-transition: border-color .5s;
  transition: border-color .5s;
}