.ion h1{width: 100%;text-align: center;font-weight: normal;font-size: 20px;margin-top: 25px;}
.center ul{margin-top: 40px;}
.ion li{width:283px;height:400px;float: left;margin-left: 17px;overflow: hidden;font-size: 16px;}
.ion img{width:280px;height:220px;}
.ion li p a{display:block;font-size:18px;margin-top: 10px;color: #000000;}
.ion .ion_1{margin-top: 20px;}
.ion p a:hover{color: #3EA9EF;}
@media  screen and (min-width:100px ) and (max-width:640px){
	.ion h1{font-size: 15px;}
	.ion li{margin-left:5px;}
	}