ul#top-navi {
    margin: 0; 
    padding: 0;
    text-align: center;
}

ul#top-navi li {
    list-style: none;
    float: left;
    position: relative;
    margin-top: 0;
    margin-right: 0; 
    padding: 0;
    width: 160px;
    text-align: left;
}

ul#top-navi li ul {
    margin: 0; 
    padding: 0;
    position: absolute;
    top: 15px; 
    left: 0;
    display: none;
}

ul#top-navi li:hover ul {
    display: block;
}

ul#top-navi li ul li {
    float: none;
    display: block;
    margin-bottom: 0;
    text-align: left;
}

ul#top-navi a, ul#top-navi span {
    display: block;
    padding: 2px;
    text-decoration: none;
    border: 0;
}  
 
ul#top-navi ul li a
{
    background-color: #BCD8E9;
}
    
ul#top-navi ul li a:hover 
{
    background-color: #FFF;
}

ul#top-navi a:hover, ul#top-navi span, li a#aktuell {
    border: 0;
    background-color: #BCD8E9;
}

ul#top-navi li:hover 
{
    background-color: #BCD8E9;
}