分步实现

<ul class="progressbar">
      <li class="active" style="width: 25%;">步骤1</li>
      <li class="active" style="width: 25%;">步骤2</li>
      <li class="" style="width: 25%;">步骤3</li>
      <li class="" style="width: 25%;">步骤4</li>
    </ul>

.progressbar {
    font-family: montserrat, arial, verdana;
    margin: 15px;
    padding: 0;
    text-align: center;
    margin-bottom: 30px;
    overflow: hidden;
    counter-reset: step;
    z-index: 99;
  }
  .progressbar li {
    list-style-type: none;
    font-size: 9px;
    float: left;
    position: relative;
  }
  .progressbar li:before {
    content: counter(step);
    counter-increment: step;
    width: 20px;
    line-height: 20px;
    display: block;
    font-size: 10px;
    color: #333;
    background: #ebebeb;
    border-radius: 20px;
    margin: 0 auto 5px auto;
  }
  .progressbar li:after {
    content: '';
    width: calc(100% - 20px);
    height: 2px;
    background: #ebebeb;
    position: absolute;
    left: calc((-100% + 20px) / 2);
    top: 9px;
  }
  .progressbar li:first-child:after {
    content: none;
  }
  .progressbar li.active:before,
  .progressbar li.active:after {
    background: #a56428;
    color: white;
  }