.img_blog{
	padding: 60px 0;
}
.container{
	width: 960px;
	margin: 0 auto;
	overflow: hidden;
}
.i_b{
	text-align: center;
}

.img_item{
	box-sizing: border-box;
	float: left;
	width: 25%;
	padding: 0 4px;
}
.i_b h1{
	font-size: 50px;
	font-weight: 700;
	padding-top: 100px;
	margin: 0;
	display: inline-block;
}
.width100 {
	width: 100%; 
}