.lyj_header{
    background-repeat: no-repeat;
    background-position: 0 0;
    background: -moz-linear-gradient(top, none, none);
    background: -webkit-gradient(linear, left top, left bottom, from(none), to(none));
    background: -o-linear-gradient(top, none, none);
    background: -ms-linear-gradient(top, none, none);
    background: linear-gradient(top, none, none);
    width: 100%;
    min-width: 1200px;
    background-size: auto;
    height: 80px;
    left: 0px;
    top: 0px;
    position: fixed;
    z-index: 1000;
    margin-top: 0px;
    background-color: #262626;
}

.header{
    width: 1200px;
    height: 80px;
    position: relative;
    margin: 0 auto;
}


.header_img{
    position: absolute;
    height: 70px;
    width: 128px;
    left: 0px;
    top: 7px;
    z-index: 18;
}

.header_nav{
    position: absolute;
    height: 74px;
    width: 500px;
    right: 0px;
    top: 6px;
    z-index: 16;
}

.header_nav ul{
    height: 74px;
    width: 500px;
}

.header_nav ul li{
    height: 74px;
    line-height: 74px;
    width: 25%;
    float: left;
    padding: 0;
    margin: 0;
    list-style: none;
    background-color: transparent;
    background-image: none;
    background-repeat: no-repeat;
    background-position: 50% 50%;
    background: -webkit-linear-gradient(none, none);
    background: -moz-linear-gradient(none, none);
    background: -ms-linear-gradient(none, none);
    background: linear-gradient(none, none);
    background-size: auto;
    text-align: center;
}
.header_nav ul li a{
    height: 100%;
    width: 100%;
    display: block;
    font-family: "思源黑体"!important;
    font-size: 14px;
    position: relative;
    color: #fff;
}

.header_nav ul li a:hover  span.mw-iconfont{
    display: block;
}

.header_nav ul li a.active  span.mw-iconfont{
    display: block;
}


.header_nav ul li a span.mw-iconfont{
    position: absolute;
    width: 5px;
    height: 5px;
    background: #3d92fa;
    top: 58px;
    left: 56px;
    border-radius: 5px;
    display: none;
}


.dropdown  .dropdown-menu{
    background: #fff;
    width: 100% !important;
    height: auto;
    display: none;
}

.dropdown  .dropdown-menu li{
    width: 100% !important;
    color: #474157 !important;
}

.dropdown  .dropdown-menu li a {
    color: #474157 !important;
}

li.dropdown:hover  .dropdown-menu{
    display: block;
}