#content {
    width: 900px;
    height: 80px;
    float: right;
}

    #content #nav {
        height: 77px;
        background-color: #fff;
        float: right;
        margin-right: 100px;
    }

        #content #nav ul {
            list-style: none;
        }

            #content #nav ul li {
                float: left;
                width: auto;
                margin-right: 35px;
                line-height: 77px;
                position: relative;
            }

#nav div {
    min-width: 100px;
    position: absolute;
    left: -10px;
    padding-bottom: 0px;
    float: left;
    height: 0;
    overflow: hidden;
    padding: 0px 10px 0px 10px;
}

#content #nav li .a {
    text-decoration: none;
    color: #000;
    line-height: 74px;
    display: block;
}

#content #nav li {
    border-bottom: 5px solid #fff;
}

    #content #nav li:hover {
        border-color: #23abf1;
    }

#nav div a {
    text-decoration: none;
    color: #000;
    line-height: 50px;
    display: block;
    border-bottom: 1px solid #fff;
    background-color: #fff;
    opacity: 0.8
}

    #nav div a:hover {
        border-color: #23abf1;
    }