body,div，a{ font-family: 宋体;}
.k_nav{
    width: 890px;
    height: 36px;
    margin-left: auto;
    margin-right: auto;
    background-color: #333;
    margin: 0;
    padding: 0;
    overflow: hidden;
}
.k_nav ul{
    margin: 0;
    padding: 6.5px 10px 6.5px 12.5px;
}
.k_nav ul li{
    list-style: none;
    margin: 0;
    padding: 0;
    float: left;
    height: 23px;
}
.k_nav ul li.a{
    list-style: none;
    margin: 0;
    padding: 0;
    width: 1px;
    height: 16px;
    background-color: #fff;
    overflow: hidden;
    margin-top: 3.5px;
}
.k_nav ul li.b{
    margin-left: 12px;
    margin-right: 13px;
    z-index: 11;
}
.k_nav ul li.b a{
    display: block;
    width: 100%;
    height: 100%;
    font-size: 12px;
    color: #fff;
    line-height: 23px;
    text-decoration: none;
}
.k_nav ul li.b a:hover{
    color: #fff;
    text-decoration: none;
}

.k_menu{
    position: absolute;
    z-index: 22;
    top: 11.5px;
    left: 0;
    padding: 5px 20px 5px 20px;
    background-color: #333;
    border: 1px solid #fff;
    display: none;
}
.k_menu a{
    display: block;
    line-height: 3;
    font-size: 12px;
    color: #fff;
    text-decoration: none;
    text-align: left;
}
.k_menu a:hover{
    color: #fff;
    text-decoration: none;

}