SOURCE

<div class="pancel">
        <div class="pancel-all">
          <div class="pancel-head">
            > This is panel header 1
          </div>
          <div class="pancel-body">
            <p>
              A dog is a type of domesticated animal. Known for its loyalty and
              faithfulness, it can be found as a welcome guest in many
              households across the world.
            </p>
          </div>
        </div>
        <div class="pancel-all">
          <div class="pancel-head">
            > This is panel header 2
          </div>
        </div>
        <div class="pancel-all">
          <div class="pancel-head">
            > This is panel header 3
          </div>
        </div>
      </div>

* {
    width: 800px;
    margin: 0 auto;
    padding: 30px 50px;
}

.pancel {
    width: 600px;
    margin: 0 auto;
}

.pancel-all {
    color: rgb(0, 0, 0);
    font-size: 14px;
    border: 1px solid rgba(155, 14, 168, 0.438);
}

.pancel-head {
    background-color: #c9baba;
    padding: 15px 25px;
}

.pancel-body {
    padding: 15px 25px;
    color: rgba(0, 0, 0, 0.45);
    border-top: 1px solid rgba(0, 0, 0, 0.25);
}