.contant{background-size: 100% 100% !important;  height:500px  !important;}
*{
	box-sizing: border-box;
	-webkit-box-sizing: border-box;
	-moz-box-sizing: border-box;
	-ms-box-sizing: border-box;
}
body{
	margin: 0;
	padding: 0;
	font-family: "microsoft yahei";
	color: #333;
	font-size: 16px;
}
ul,li,dl,dt,dd{
	margin: 0;
	padding: 0;
	list-style: none;
}
isy_frame{
	display: block;
}
img{
	border: none;
	max-width: 100%;
}
p,h1,h2,h3,h4,h5,h6{
	margin: 0;
	padding: 0;
}
h1,h2,h3,h4,h5,h6,i,em,b{
	font-weight: normal;
	font-style: normal;
}
a{
	text-decoration: none;
}
input,select,textarea,button{
	outline: none;
	padding-top: 0;
	padding-bottom: 0;
	font-family: "microsoft yahei";
}


.clearfix:before,
.clearfix:after {
    display: table;
    content: " ";
}
.clearfix:after {
    clear: both;
}
.clearfix{
    *zoom: 1;
}
.ss_main{ width: 1200px; margin: 0 auto;}