Regarding CSS Styles for Lists

On our site, we have an administrative portal that has several forms, log-ins, etc, built in .aspx, that are set up using something about like this format:

<ol>
    <li>Input for Name</li>
    <li>Input for Password</li>
    <li>Button to Log In</li>
    <li>Check-Box to Keep Me Logged In</li>
</ol>

Of course, they didn't want the numbers or bullet-points to show up on the side, so they wrote some CSS like this:

.inside fieldset ol li {
list-style: none;
margin-left: 0;
}

The problem now, is that we have a lot of informational pages in there now, that contain numbered lists, and because of the CSS styling, they do not display the numbers.

I have tried putting this code directly onto one of the pages:

<style>
.wwu-inside fieldset ol li {
list-style: decimal; !important
margin-left: 0;
}
</style>

But apparently, the numbers still don't show up...

There are more of those forms than there are informational pages, and to root through the whole thing to find and change individual styling would be far too tedious a task, so I was wondering if anyone could suggest a solution to this.

I have also tried creating a new class, like this:

.numbered-list {
list-style-type: decimal;
}

But that doesn't seem to work either.

(Furthermore, do I apply that class to the < ol > tags, or to each individual < li> tag? I assumed the < ol > and applied it there, as I assumed it would carry down, but it doesn't look like it has.)

Any assistance or insight would be greatly appreciated. I really feel like I should be more familiar with CSS than I am, having been at it this long. :\

Thanks!