.tab-group{
}
.tab{
	flex-grow: 1;
	text-align: center;
	cursor: pointer;
	background-image: url(../image/exbtn1.png);
	background-repeat: no-repeat;
	height: 100px;
	background-size: contain;
}
.panel{
  display:none;
}
.tab.is-active{
	color: #FFF;
	transition: all 0.2s ease-out;
	background-image: url(../image/exbtn2.png);
	background-repeat: no-repeat;
}
.panel.is-show{
  display:block;
}