This was inspired by the new AP News design. It makes a conservative section separator. It uses some ACSS variables, but these could easily be swapped out for custom or just hex colors of your choice.

Example and code

.title-highlighter{
  padding-block-start:1.5rem;
  border-block-start:1px solid var(--neutral-dark-trans-10);
  width:100%;
  position:relative;
}
.title-highlighter::before{
  content:"";
  position: absolute;
  top: 0;
  height: 8px;
  width: 80px;
  background-color: var(--danger);
}