CodePen Embed - LBxrMQ

<h2>見出しのサンプル</h2>
アンダーラインの色が変わる見出し

h2 {
  border-bottom: solid 3px #f2e391;
  position: relative;
}

h2:after {
  position: absolute;
  content: " ";
  display: block;
  border-bottom: solid 3px #f7ad01;
  bottom: -3px;
  width: 20%;
}

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