Sticky Columns in Fluid Engine?

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I want to add a sticky sidebar (made of various blocks) and apply it to multiple pages.

In 7.1 classic editor, I could make the sidebar blocks collectively sticky by targeting the column within the section, using the code below. Super quick and easy.

Is there a way to do this in fluid engine? Feels a lot cleaner than having to target each block for different top heights, especially as I want to add it to a few pages.

section[data-section-id="...."] .sqs-layout > .sqs-row > .sqs-col-3 {
	position: sticky!important;
	position: -webkit-sticky!important;
	top: 140px;
    z-index: 99999;
    }

Thanks all!

Do Sidebar as first block, then use this code

section[data-section-id="...."] .fluid-engine>.fe-block:first-child {
	position: sticky!important;
	position: -webkit-sticky!important;
	top: 140px;
    z-index: 99999;
    }

First block means block which you added first in that section.