Change H1 size on pages – Enfold theme

Hi,

I want to increase the H1 heading font size on internal pages. I’ve tried previous support suggestions of quick CSS changes like this:

h1 { font-size: 34px; }

and

.template-page .entry-content h1 { font-size: 34px;}

But this only affects the H1 on the home page. I want to enlarge the H1 on internal pages – an example page on my site (under construction) is http://welloptimised.com.au/website-optimisation/content-marketing/

Can you please advise how / where I can make that change?

Thanks a lot,

Steve