Remove certain menu items with CSS (Vantage theme)

Hi,

First of all, I have to say I love the Vantage theme.

I am currently working on setting up some landing pages. I would like to hide/disable every menu item except 1, the contact button. Is there a way to disable these items using CSS on these landing pages?

I have found the following code:

.page-id-1702 .main-navigation {
display: none;

}

But as you can see, this will remove the entire menu.

Thanks in advance!

Laurence