.html404{ position: relative; height:100%; }
.body404{ position: relative; width:100%; height:100%; overflow:hidden; background:#78b6dd url("../images/404/404bg.png") no-repeat center bottom; background-size:100% auto; color:#ffffff; font-family: Verdana, "微软雅黑", Arial, Helvetica, sans-serif}


.container404{ position: relative; top: 50%; margin-top: -100px; text-align: center;  }
	.container404 .font_big{ font-size:80px; }
	.container404 .font_mid{ font-size:48px; }
	.container404 .font_small{ font-size:22px; }
	.container404 .btn_back{ display:inline-block; width:90px; height:34px; background: #ffffff url("../images/404/btn_back_bg.gif") 9px center no-repeat;  line-height:34px; text-align: left; text-indent:29px; color:#78b6dd; text-decoration:none; margin-top:50px;}
	.container404 .btn1{ margin-right:20px; }
	.container404 .btn_back:hover{ background-color:#f2f8fc;}
@media screen and (max-width:640px){
	.container404{ margin-top: 0px; transform:translateY(-50%);}
	.container404 .font_big{ font-size:40px; }
	.container404 .font_mid{ font-size:24px; }
	.container404 .font_small{ font-size:12px; }		
}