@charset "utf-8"; 

.main_content {position:relative; width:100%; margin-top:-150px; z-index:10; }

.conBox01 {width:1400px; margin:0 auto;}
.conBox02 {width:1400px; margin:0 auto 70px;}
.conBox02::after{display: block; content: ''; clear: both;}

.I01_1{position:relative; width: 100%; margin-bottom: 40px;}
.I01_2{position:relative; width: 100%; height: 270px; margin-bottom: 20px;}
.I01_3{position:relative; width:915px; float: left;}
.I01_4{position: relative; width: 425px; float: right;}

@media screen and (max-width:1420px) {
	.conBox01 {width: 95%;}
	.conBox02 {width: 95%;}
	.I01_3{width: 60%;}
	.I01_4{width: 38%;}
}

@media screen and (max-width:1024px) {
	.main_content{margin-top: -85px;}
	.conBox02{margin-bottom: 40px;}

	.I01_3{width: 100%;}
	.I01_4{width: 100%;}
}

@media screen and (max-width:680px) { 
	.I01_1{margin-bottom: 20px;}
}

@media screen and (max-width:480px) {
	.conBox02{margin-bottom: 30px;}
	
	.I01_2{height: 250px;}	
}