a{
            font-family: 微软雅黑;
        }

        .top{
            width: 100%;
            height: 520px;
            margin: 0 auto;
        }

        .top-box {
            height: 200px;
            width: 100%;
            position: absolute;
            z-index: 100;
        }

        .top_context{
            width: 1600px;
            margin: 0 auto;
        }

        .top_logo {
            width: 300px;
            float: left;
            color: white;
            font-size: 30px;
            margin-top: 5px;
            margin-left: 50px;
            height: 100px;
        }

        .top_nav{
            width: 350px;
            margin-top: 50px;
            float: right;
            margin-right: 73px;
        }

        .top_nav a{
            float: left;
            font-size: 18px;
            text-decoration: none;
            color: white;

        }

        .top_search{
            width: 200px;
            height: 50px;
            float: right;
        }

        .top img {
            position: absolute;
            z-index: 1;
        }

        .main_nav{
            float: right;
            height: 200px;
            z-index: 100;
            position: relative;
            margin-right: 95px;
            margin-top: 50px;
        }

        .main_nav ul li{
            float: left;
            width: 120px;
            height: 50px;
            list-style: none;
            text-align: center;
        }

        .main_nav ul li a{
            color: #161b38;
            font-size: 22px;
            line-height: 50px;
            text-decoration: none;
        }
        .main_nav ul :hover .main_nav2{
            display: block;
        }

        .main_nav2{
            display: none;
            width: 370px;
            background: #FFFFFF;
            opacity: 0.9;
            position: absolute;
        }

        .main_nav2 ul{
            padding: 20px 20px;
            height: 160px;
        }

        .main_nav ul li ul li{
            float: left;
            width: 165px;
            height: 40px;
            list-style: none;
            color: #666666;
            text-align: left;
            overflow: hidden;
        }

        .main_nav ul li ul li a{
            font-size: 20px;
            line-height: 40px;
            color: #666666;
            font-weight: normal;
        }

        .main_nav2 :hover{
            color: #333664;
        }
        .box{
            width: 1600px;
            /*! height: 900px; */
            margin:  0 auto;
        }

        .box_left{
            width: 250px;
            background: #333664;
            margin-top: -220px;
            margin-left: 100px;
            z-index: 100;
            position: absolute;
            opacity: 0.9;
        }

        .box_left_top{
            width: 100%;
            height: 120px;
            text-align: center;
            overflow: hidden;
        }

        .box_left_top a{
            font-size: 30px;
            color: #FFFFFF;
            line-height: 130px;
        }

        .box_left_context{
            width: 230px;
        }

        .box_left_context ul li{
            width: 144px;
            height: 30px;
            list-style: none;
            margin-left: 19px;
            overflow: hidden;
            line-height: 30px;
        }

        .box_left_context ul li a{
            font-size: 18px;
            color: #FFFFFF;
            text-decoration: none;

        }

        .box_content{
            width: 1050px;
            margin-left: 447px;
            margin-top: 90px;

        }

        .box_right{
            width: 1100px;
            margin-left: 400px;
            margin-top: 100px;
        }

        .box_right_top{
            width:100%;
            height: 30px;
        }

        .box_right_top a{
            font-size: 30px;
            color: #333664;
            font-weight: bolder;
        }

        .box_right_context{
            width: 1050px;
            height: 600px;
            margin-top: 30px;
        }

        .box_right_context ul li{
            list-style: none;
            height: 40px;
        }

        .box_right_context ul li a {
            font-size: 18px;
            color: black;
            line-height: 40px;
            text-decoration: none;
            font-weight: normal;
        }

        .foot{
            width: 100%;
            height: 120px;
            background: #c8c8c8;
        }

        .foot_context{
            width: 1600px;
            margin: 0 auto;
        }