How to permanently change header font on my website?

[ManuFont79]

I have no idea why when I inspect my header's font got an "Important", ergo I cannot change the font of the Header. I can change the font of everything else, but not that one... I mean, it changes...but does not stay like that. I am good enough to see where the problem lays, but not code savvy enough to know how to fix it. Could any kind soul have a solution for this. I am under the impresion that somebody who knows how to code will be able to fix it quite easy. I tried on a copy of my theme...but least say...it was not pretty. 

my web page is called www.angelkissbeachwear.com

[ZestardTech · Accepted solution]

Hello There,

1. In your Shopify Admin go to online store > themes > actions > edit code
2. Find Asset >theme.scss.css and paste this at the bottom of the file:

body #Hero-hero-1 DIV.hero__inner DIV.page-width.text-center H2.h1.mega-title {
font-family: Alfie,serif !important;
}

[ManuFont79]

Thanks ZestardTech! Worked like a charm