.section-intro {
  text-align:center;
  font-size:clamp(1.6rem,3vw,2.2rem);
  font-weight:600;
  margin-bottom:3rem;
}

.section-intro::after {
  content:"";
  display:block;
  width:90px;
  height:4px;
  margin:1rem auto 0;
  background:linear-gradient(to right,#ffcc66,#ffb400);
  border-radius:6px;
}

.highlight {
  background:linear-gradient(120deg,rgba(255,165,0,.35),rgba(255,200,80,.55));
  padding:.2em .4em;
  border-radius:.3em;
  font-weight:700;
}