body > .content {
	margin: 0 auto;
}

.header_img, .header_img img {
	animation-name: op;
	animation-duration: 10s;
	animation-iteration-count: 1;
	-moz-animation-fill-mode:forwards;
	     animation-fill-mode:forwards;
	opacity: 0;
}

.header_img {
	background-repeat: no-repeat;
	height: 660px;
	margin-bottom: 200px;
	margin-left:-700px;
	margin-top: 80px;
	left:50%;
	position: relative;
	width: 1400px;
}

.header_img img {
	left:0;
	position: absolute;
	top:0;
	
	animation-delay: 2s;
}

@keyframes op {
	0%   {opacity:0}
	20%  {opacity:0}
	38%  {opacity:1}
	100% {opacity:1}
}

nav {
	position: absolute;
	top: 820px;
	width: 100%;
	z-index:999;
}

.category .content.row {
	height: 240px;
	position: relative;
}

.category a {
	display: block;
	height: 100%;
	-webkit-transition: all 0.5s linear;
	   -moz-transition: all 0.5s linear;
	    -ms-transition: all 0.5s linear;
	     -o-transition: all 0.5s linear;
	        transition: all 0.5s linear;
	width: 100%;
}

.category a:hover {
	opacity: 0.6;
}

.category .info {
	box-sizing:border-box;
	padding-left: 80px;
	padding-top: 70px;
	text-align: left;
	width: 50%;
}

.category .description {
	font-size: 1.4rem;
	letter-spacing: 0.04px;
	line-height: 2;
	margin-top: 30px;
}

.category .image {
	height: 100%;
	width: 700px;
}

.category .image.left {
	margin-left: -200px;
}

.category .image.right {
	margin-right: -200px;
}

.category.scene .image {
	background-image: url(../img/top/category_bg/scene.png);
}
.category.gather .image {
	background-image: url(../img/top/category_bg/gather.png);
}
.category.knowledge .image {
	background-image: url(../img/top/category_bg/knowledge.png);
}
.category.feel .image {
	background-image: url(../img/top/category_bg/feel.png);
}

.illustrative_area {
	height: 760px;
	left: 50%;
	margin-left: -700px;
	position: relative;
	width: 1400px;
}

.illustrative_area img {
	position: absolute;
}

.illustrative_area .image01 {
	left: 372px;
	top: 107px;
}
.illustrative_area .image02 {
	left: 776px;
	top: 163px;
}
.illustrative_area .image03 {
	left: 1035px;
	top: 26px;
}
.illustrative_area .image04 {
	left: 138px;
	top: 385px;
}
.illustrative_area .image05 {
	left: 439px;
	top: 411px;
}
.illustrative_area .image06 {
	left: 772px;
	top: 471px;
}

.backnumber {
	height: 100px;
}