CSS實現簡易步驟

先上效果圖

html內容：

<ul class="steps">
    <li>用戶信息</li>
    <li>孩子信息</li>
    <li>孩子父母</li>
    <li class="active">完成提交</li>
</ul>'

添加樣式：

.steps {
  position: relative;
  margin-bottom: 30px;
  counter-reset: step;  /*創建步驟數字計數器*/
}
/*步驟描述*/
.steps li {
  list-style-type: none;
  font-size: 12px;
  text-align: center;
  width: 25%;
  position: relative;
  float: left;
}

/*步驟數字*/
.steps li:before {
  display: block;
  content: counter(step); /*設定計數器內容*/
  counter-increment: step;  /*計數器值遞增*/
  width: 32px;
  height: 32px;
  background-color: #019875;
  line-height: 32px;
  border-radius: 32px;
  font-size: 16px;
  color: #fff;
  text-align: center;
  font-weight: 700;
  margin: 0 auto 8px auto;
}

/*連接線*/
.steps li ~ li:after {
  content: '';
  width: 100%;
  height: 2px;
  background-color: #019875;
  position: absolute;
  left: -50%;
  top: 15px;
  z-index: -1; /*放置在數字後面*/
}

/*將當前/完成步驟之前的數字及連接線變綠*/
.steps li.active:before,
.steps li.active:after {
  background-color: #019875;
}

/*將當前/完成步驟之後的數字及連接線變灰*/
.steps li.active ~ li:before,
.steps li.active ~ li:after {
  background-color: #777;
}