.nav_bg {
    background: url(/web/images/head/daohang.png) repeat-x;
    height: 45px;
    margin: auto;
}

.nav {
    width: 1150px;
    margin: auto;
}

    /*链接未点击上去时候*/
    .nav a:link {
        text-decoration: none;
    }
    /* 链接已经点击过的*/
    .nav a:visited {
        text-decoration: none;
    }
.nav_ul {
    list-style: none;
}

.nav_item {
    font-size: 16px;
    float: left;
    width: 140px;
    margin-left: 3px;
    height: 35px;
    text-align: center;
    margin-top:5px;
}
    /*访问前*/
    .nav_item a {
        display: block;
        text-align: center;
        height: 35px;
        line-height: 35px;
    }

        .nav_item a:hover {
            display: block;
            color: white;
            background-image: url('/web/images/head/xuankuang.png');
        }

.nav_class {
    position: absolute;
    top: 169px;
    background-color: white;
    width: 140px;
    left: 145px;
    border: solid 1px #D2D2D2;
    border-width: 1px 1px 0 1px;
    z-index: 3;
    transition: all 0.5s linear;
    display: none;
}

.nav_class_ul {
    padding: 0;
    list-style: none;
}

.nav_class_item {
    text-align: left;
    border-bottom: solid 1px #E0E0E0;
    background-color: white;
}

    .nav_class_item a {
        display: block;
        padding: 0;
        line-height: 45px;
    }
        /**选中的背景色*/
        .nav_class_item a:hover {
            background-color: #379FC7;
            color:white;
        }


/***lanrenmoban***/
.nav_class ul {
    width: 150px;
    height: auto;
    position: absolute;
    background: #DADADA;
    list-style: none;
}

    .nav_class ul a {
        font-family: '微软雅黑';
        font-size: 14px;
        color: #333;
        text-decoration: none;
    }

        .nav_class ul a:hover {
            color: white;
            text-decoration: none;
        }

    .nav_class ul li {
        width: 210px;
        height: 45px;
        line-height: 45px;
        text-align: center;
        position: relative;
    }
        /*鼠标放在链接上未点击*/
        .nav_class ul li:hover {
            background: #379fc7;
        }

    .nav_class ul.nav_class_item_ul2 {
        left: 210px;
        top: 0;
        display: none;
    }

.nav_class_item_ul2 .nav_class_item2 {
    width: 150px;
}

.nav_class_item2 a:hover {
    background: #379fc7;
}

.nav_class .nav_class_ul .nav_class_item:hover ul.nav_class_item_ul2 {
    display: block;
    background: #72cdef;
}
/***lanrenmoban***/