* { margin: 0; padding: 0; outline: 0; }

img{ 
	display: block; 
	width: 100%;
}

a{
	text-decoration: none;
}

li,ol{
	list-style: none;
}

.limit_div{
	width: 1500px;
	height: auto;
	margin: 0 auto;
}

.header_div{
	position: relative;
	width: 100%;
	height: 70px;
	background-color: #ffffff;
	border-bottom: 1px solid #222222;
	box-sizing: border-box;
}


.header_logo{
	position: absolute;
	top: 15px;
	width: 480px;
	height: 70px;
}

.header_meun{
	float: right;
	width: 700px;
	height: 70px;
}

.header_meun li{
	float: left;
	width: 170px;
	height: 70px;
	line-height: 70px;
	font-family: "Microsoft Yahei";
	font-size: 14px;
	font-weight: 600;
	color: #000000;
	text-align: center;
}

.header_meun li:hover {
	font-size: 15px;
	font-weight: bold;
	color: #000000;
  }

@media (min-width: 1900px){

	.limit_div{
		width: 1500px;
	}
	
}