#page_header.page_header_history {
  background-image: url(../img/history/page_header_history.jpg);
}

.history_classification .history_business .history_title_business,
.history_classification .history_tec_pro .history_title_tec_pro {
	text-align: center;
	color: #fff;
	font-weight: bold;
	background: #999999;
}

.history_classification .history_business .history_title_business {
	background: #c8161d;
}

.history_classification .history_tec_pro .history_title_tec_pro {
	background: #e7484f;
}

@media (max-width: 639px) {

	.history_block .history_age_wrap {
		margin-bottom: 38px;
		position: relative;
	}

	.history_block .history_age {
		margin-bottom: 10px;
		font-weight: bold;
		text-align: center;
		background: #fff;
	}

	.history_block .history_age {
		font-size: 16px;
	}

	.history_block .history_age strong {
		font-size: 20px;
	}

	.history_classification .history_business .history_title_business,
	.history_classification .history_tec_pro .history_title_tec_pro {
		padding: 10px;
	}
	
	.history_classification .history_business {
		margin-bottom: 20px;
	}
	
	.history_list {
		padding: 0;
		margin: 0;
		list-style-type: none;
		border: 1px solid #dedede;
	}

	.history_list li .history_season,
	.history_list li .history_content	{
		padding: 0 15px 15px;
	}
	
	.history_list li + li,
	.history_list .history_content {
		border-top: 1px solid #dedede;
	}
	
	.history_list li .history_season {
		padding: 8px 15px;
		margin: 0;
		background: #f8f8f8;
	}
	
	.history_list li .history_content {
		padding: 8px 15px 8px;
		margin: 0;
	}
	
	.history_list li .history_content p + p {
		padding-top: 12px;
	}
	
	.history_list li .history_content p {
		margin-bottom: 0;
	}
	
	.history_list li .history_content .img-area {
		padding-bottom: 7px;
	}
	
}

@media (min-width: 640px) {

	.history_block {
		position: relative;
	}

	.history_block:before {
		content: "";
		width:  0.3vw;
		height: calc(100% - 1.17vw);
		background: #999999;
		position: absolute;
		top: 0;
		right: 0;
		left: 0;
		margin: auto;
	}

	.history_block:after {
		content: "";
		width: 0;
		height: 0;
		border-style: solid;
		border-width: 1.3vw 0.83vw 0 0.83vw;
		border-color: #999999 transparent transparent transparent;
		position: absolute;
		bottom: 0;
		right: 0;
		left: 0;
		margin: auto;
	}

	.history_block .history_age_wrap {
		margin-bottom: 2.3vw;
		position: relative;
	}

	.history_block .history_age {
		margin-bottom: 0.833vw;
		font-size: 1.33vw;
		font-weight: bold;
		text-align: center;
		background: #fff;
	}

	.history_block .history_age strong {
		font-size: 2vw;
	}

	.history_classification:after {
		content: "";
		display: block;
		clear: both;
	}
	
	.history_classification .history_business {
		float: left;
	}

	.history_classification .history_tec_pro {
		float: right;
	}
	
	.history_classification .history_business,
	.history_classification .history_tec_pro {
		width: 48.33%;
		max-width: 580px;
	}

	.history_classification .history_business .history_title_business,
	.history_classification .history_tec_pro .history_title_tec_pro {
		padding: 1vw 0.8vw 0.8vw;
	}
	
	.history_list {
		padding: 0;
		margin: 0;
		list-style-type: none;
		border: 0.08vw solid #dedede;
	}

	.history_list li .history_season,
	.history_list li .history_content	{
		padding: 0 1.25vw 1.25vw;
	}
	
	.history_list li + li,
	.history_list .history_content {
		border-top: 0.08vw solid #dedede;
	}
	
	.history_list li .history_season {
		padding: 1.33vw 1.25vw 1.42vw;
		margin: 0;
		background: #f8f8f8;
	}
	
	.history_list li .history_content {
		padding: 1.33vw 1.25vw 1.25vw;
		margin: 0;
	}
	
	.history_list li .history_content p + p {
		padding-top: 1vw;
	}
	
	.history_list li .history_content p {
		margin-bottom: 0;
		line-height: 1.75;
	}
	
}

@media (min-width: 1200px) {

	.history_block:before {
		width:  4px;
		height: calc(100% - 14px);
	}

	.history_block:after {
		border-width: 16px 10px 0 10px;
	}

	.history_block .history_age_wrap {
		margin-bottom: 28px;
	}

	.history_block .history_age {
		margin-bottom: 10px;
		font-size: 16px;
	}

	.history_block .history_age strong {
		font-size: 24px;
	}

	.history_classification .history_business,
	.history_classification .history_tec_pro {
		width: 48.33%;
		max-width: 580px;
	}

	.history_classification .history_business .history_title_business,
	.history_classification .history_tec_pro .history_title_tec_pro {
		padding: 12px 10px 10px;
	}
	
	.history_list {
		border: 1px solid #dedede;
	}

	.history_list li .history_season,
	.history_list li .history_content	{
		padding: 0 15px 15px;
	}
	
	.history_list li + li,
	.history_list .history_content {
		border-top: 1px solid #dedede;
	}
	
	.history_list li .history_season {
		padding: 16px 15px 17px;
	}
	
	.history_list li .history_content {
		padding: 16px 15px 15px;
	}
	
	.history_list li .history_content p + p {
		padding-top: 12px;
	}

}