Hi there!

Thanks for reaching out.

It would be better to have your site URL though.

You may try the following code in your custom CSS:

#sp-header{
    margin-top: 80px !important;
}
#sp-header-topbar {
    position: fixed;
    z-index: 999999;
    top: 0;
    left: 0;
    width: 100%;
}

In general this code should work. Otherwise give me your site URL to have a look into it.

Here is all about custom code placement in the Helix Ultimate framework: https://www.joomshaper.com/documentation/helix-framework/custom-code-css-js-meta

Best regards,