Placeholder "fixed" element, should not overlap active accordion item when page first loads.
Deep linking will auto-scroll to your selected accordion item. If there is a "fixed" element on the page, it may overlap your tabs. To fix this, use scroll_offset_selector to select the "fixed" element. That will offset the scroll position by the "fixed" element's height. Use scroll_offset for any additional adjstments. See a demo: ?selected-accordion-item=item-3.