Font size H2 H3 etc issue in Hello elementor wordpress 6.5.3

Hello!

I am facing problem with the font size issues of H2, H3, H4 etc. Although H1 is showing fine, However the size of H2<H3, H3=H4 and so on.

Example: In the shared link, we can see that H2 “Introduction” font is < H3 “Brief overview . . . . “

I can see this issue on my landing pages as well.

Theme: I am using free version of Hello elementor.

WordPress 6.5.3

I happened to find the css code where they mentioned about font sizes in Theme file editor (Attached)

I also found mention of H2 in “Additional CSS” (Attached)

Please let me know if you need any further information. Any help would be greatly appreciated.

The page I need help with: [log in to see the link]