.btn{
  line-height: 25px;
  padding:0px 5px;
  font-size: 14px;
  border:1px solid gray;
  border-radius: 5px;
  text-align: center;
  cursor: pointer;
}
.btn_s{
  line-height: 17px;
  padding:0px 3px;
  font-size: 12px;
  border:1px solid gray;
  border-radius: 5px;
  text-align: center;
  cursor: pointer;
}
.btn_gray{
  background: #929292;
  color:#fff;
}
.btn_gray:hover{
  background: #aaa;
  color:#fff;
}
.btn_red{
  background: red;
  color:#fff;
}