css selectors - CSS element child vs child with text node

Question

I have an element that has a child and another element with the same child, but there is also a text node:

<p><strong>This should be heading</strong></p>
...
<p>There is a sentence that has <strong>strong text</strong> inside it.</p>

I do not have the ability to modify the DOM structure in any way, including no JavaScript. All I can do is edit CSS, but I want to style the inline strong differently than the strong that is the only child.

I thought this might work:

p strong:only-child
{
    color: red;
}

However, both items turn red.

Is there a way to target child nodes that don't have text node siblings, using only CSS?

I don't think it can be done, but I figured I'd ask in case there is some sort of clever work-around.

Answer 1

As per my understanding I think it should be like

p:first-child
{
    color: red;
}

JSFiddle