.liucheng h1{width: 100%;text-align: center;font-weight: normal;font-size: 20px;margin-top: 25px;}
.liucheng p{width: 100%;text-align: center;font-size: 18px;padding-top: 10px;}
.liucheng span{display:block;font-size: 16px;padding-top: 10px;}
@media  screen and (min-width:100px ) and (max-width:640px){
	.liucheng h1{font-size: 15px;text-align: center;}
	.liucheng p{text-align:center;font-size:13px;}
	.liucheng span{font-size: 10px;margin-left:5px;}
	}