[Theme Twenty-Fourteen] Remove post title from display page, but keep on Grid

I’d like to know what CSS changes I can make to remove (or change) the post title from the content page where the post displays. But I’d also like to keep it on the front page so that it displays with the Grid.

I have no problem removing the title from the post, but using the usual method targeting the post title with the following (where x is the post number) always removes it from both the front page and the content page:

#post-x .entry-title {
display: none;
}