Change the font size of title

Hello, Support,

I fixed the title font size from Home menu, but I still can see the article title font size is still big.
Now, here is the summary.

1. After clicking "read more" button, then the font size of title is still big. I would like to change this font size also. What is the css tag? It should be similar with as follows?

div#fd.eb .eb-entry-title reset-heading a {
font-size: 15px !important;
}

Please see font1 and font2.jpg also.

Thanks for your kind support

Regards,