No, your CSS is fine, don’t make those changes.
Above, I suggested you add:
<div class="alert-meetings">Please help us add more meetings. Click <span style=”text-decoration: underline;”>HERE!</span></div>
What you added instead was:
<h4><span style="color: #000000;">Please help us add more meetings. Click <span style="color: #ff0000;"><a style="color: #ff0000;" href="https://www.101tipsforaddicts.com/add-a-meeting/"><span style="text-decoration: underline;"><strong>HERE</strong></span></a></span>!</span></h4>
What I’m saying is wrap that whole thing in the div.
<div class="alert-meetings"><h4><span style="color: #000000;">Please help us add more meetings. Click <span style="color: #ff0000;"><a style="color: #ff0000;" href="https://www.101tipsforaddicts.com/add-a-meeting/"><span style="text-decoration: underline;"><strong>HERE</strong></span></a></span>!</span></h4></div>