* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}
body {
	width: 100%;
	height: 100%;
}
.sub_content_title {padding-bottom:5%;}
.history_btn {
	display:flex;
	justify-content: center;
	gap: 2.5%;
	padding-bottom:7%;
}
.history_btn span {
	padding : 1rem 1.5rem;
	border-radius:10px;
	border: 1px solid #999;
}
.history_btn span:hover {
	cursor:pointer;
}
.on {
	color: #fff;
	border: none !important;
	background: linear-gradient(270deg, #14aee1, #1fdbb1);
}
.history_wrap {
	display: flex;
	justify-content: center;
	gap: 5%;
	padding-bottom: 80px;
}
#reverse{
	flex-direction: row-reverse;
}
.year {
	background: linear-gradient(270deg, #14aee1, #1fdbb1);
	color: transparent;
	-webkit-background-clip: text;
	font-size: 3em;
	font-weight: 600;
}
.year img {padding-top: 10px;}
hr {
	width: 3.5px;
	height: 80px;
	margin: 0 auto;
	background: linear-gradient(270deg, #14aee1, #1fdbb1);
	border: 0;
}
.history_content{
	text-align:left;
	color: #7c7c7c;
}
#reverse .history_content {
	text-align:right;
}
.history_content p {line-height:1.5rem;}
.history_content p:first-child {
	font-size: 1.5rem;
	font-weight: 600;
	color: #1d1d1d;
	padding-bottom:2%;
}
.history_content p:last-child {
	padding-bottom: 1.5rem;
}

/*¸ð¹ÙÀÏ ¹ÝÀÀÇü*/
@media screen and (max-width:500px) {
.history_btn {
	padding-bottom: 10%;
}
.sub_content_title {padding-bottom:10%;}
.history_wrap, #reverse
{	
	padding-bottom: 50px;
	flex-direction:column;
	}
.year {
	font-size: 1.5rem;	
	display: flex;
	justify-content: center;
    align-items: center;
}
.year img {display:none}
hr {
	width: 8px;
    height: 8px;
    border-radius: 100%;
	margin: 0 0.5rem;
	}
.history_content,
#reverse .history_content
{
	text-align: center;
	padding-top: 5%;
}

.history_content p {font-size:0.8rem;}
.history_content p:first-child {
	font-size: 1.1rem;
}
.history_content p:last-child {padding-bottom: 1.2rem;}
.history_btn {
	flex-direction:column;
	align-items: center;
	}
.history_btn span {
	padding : 0.7rem 0.5rem;
	border-radius:5px;
	font-size:0.9rem;
	width:50%;
	margin-bottom:10px;
	}
}