CSS change summary grid block headlines

Site URL: https://wave-take-two.squarespace.com/

How do i change the headlines for a Grid page so that the text of this:

Looks like this

https://wave-take-two.squarespace.com/team-1

https://wave-take-two.squarespace.com/team

You target the h1 or h2 font and  size for just that page or the code would change the whole site. Stick this in the summary page advanced header code injection. If the text is h1  not h2 then change the code, plus you may need to adjust the font px size. 

<style> h2 { font-size: 35px !important; } </style>

Add to Page Settings > Advanced > Header

<style>
  h2 {
    font-size: 1rem;
}
</style>

@tuanphan 

This doesnt work, its the peoples names i need to look bold and capitalised with my font.\

I am using a grid system to put them on the page