/*daohang*/
.daohang{
	width: 100%;
	height: 62px;
	background: url(../img/daohang_bg.jpg) no-repeat 0 center;
}
.daohang .nav{
	width:1200px;
	margin: 0 auto;
	line-height: 63px;
	height: 63px;
	overflow: hidden;
}
.daohang .nav li{
	float: left;
	line-height: 63px;
}
.daohang .nav li:hover{
	background-color: #0677d5;
}
.daohang .nav li a{
	font-family: "times new roman";
	font-size: 24px;
	color: #fff;
	padding-left: 42px;
	padding-right: 45px;
	border-left:2px solid #276ec7;
	border-right:2px solid #276ec7 ;	
}
.daohang .nav li:hover a{
	border: none;
}
/*banner*/
.banner_w{
	width: 100%;
	min-width: 1200px;
	height: 336px;
	background: url(../img/banner.jpg) no-repeat top center;	
}

.banner_w img{display:none;}
.robot{
	width: 257px;
	height: 485px;
	margin-top: 20px;
	background: url(../img/ai_robot.png) no-repeat;
	float: right;
	text-align: center;
}
.robot img{
	width: 228px;
	height: 84px;
	margin-top: 364px;
}
@media (max-width: 599px){
  .banner_w{background:none;height:auto;min-width:100%;}
  .banner_w img{display:block;width:100%;}
}