This is very cool and works to highlight topics in topic lists, but I also want to highlight the topic itself. It seems that the tag exists on a topic page only for the tag itself.
I tried doing this, which seems like might work, but I’m probably doing it wrong.
.title-wrapper div.has-highlight {
/* Styles for the <h1> with the class */
color: blue !important;
font-weight: bold;
}