Hi Reiner Kuske,
Thank you for contacting StyledThemes support team.
Sticky menu on your site is working perfectly but it is hiding just behind the top bar (). And also you had made your top bar fixed at the top. Here is the css you have done to make top bar fixed at the top
@media screen and (min-width: 640px) {
#scb-wrapper.scb-fixed {
position: fixed;
top: 0;
left: 0;
z-index: 2147483647;
width: 100%;
}
}
So we request you to disable the fixed position of top bar to make sticky menu working.
Let us know if you got any problems on this
Thanks