* {
    margin: 0px;
    padding: 0px;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    font-family: "Microsoft Yahei";
}

li {
    list-style: none;
}

a {
    text-decoration: none;
    color: #666;
}
header,section,nav,footer{
	min-width: 1200px;
}
header>div,nav>div,section>div,footer>div{
	width: 1200px;
	margin: 0 auto;
}

header div{
	padding: 20px;
}

nav{
	background-color: #0159a0;
}
nav div{
	padding: 0px 36px;
}
nav div>ul{
	display: -webkit-box;
	display: -ms-flexbox;
	display: flex;
}
nav div>ul>li{
	-webkit-box-flex: 1;
	    -ms-flex-positive: 1;
	        flex-grow: 1;
	text-align: center;
	color: #fff;
	position: relative;
}
nav div>ul>li>a{
	color: inherit;
	line-height: 56px;
	display: block;

}
nav div>ul>li:hover,nav div ul>li.thisColumn{
	background-color: #fff;
	color: #0159a0;
}
nav div>ul>li>ul{
	display: none;
	position: absolute;
	width: 100%;
	top: 56px;
	z-index: 99;
	left: 0px;
	-webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
}
nav div>ul>li:hover>ul{
	display: -webkit-box;
	display: -ms-flexbox;
	display: flex;
}
nav div>ul>li>ul>li{
	background-color: rgba(0, 0, 0, .4);
    line-height: 48px;
    height: 48px;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
}
nav div>ul>li>ul>li:hover{
	background-color: rgba(0, 0, 0, .6);
}
nav div>ul>li>ul>li>a {
    color: #fff;

}

footer{
	background-color: #0159a0;
}
footer div{
	display: -webkit-box;
	display: -ms-flexbox;
	display: flex;
	padding: 24px 0px;
	-webkit-box-align: center;
	    -ms-flex-align: center;
	        align-items: center;
	position: relative;
}
footer div>img{
	margin-right: 12px;
}
footer div p{
	color: #fff;
	font-size: 14px;
	line-height: 26px;
}
.back_top{
	position: absolute;
	right: 0px;
	top: 32px;
}