<h2>見出しのサンプル</h2>
左の枠のみ丸みをもたせた見出しです。
h2 {
  color: #6d4504;  /*文字色*/
  background: #fcc56c;  /*背景色*/
  padding: 10px 10px 10px 30px;  /*余白*/
  border-radius: 40px 0 0 40px;  /*角に丸み*/
}

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