1.首先组件导入,

<template>
  <div class="number-container d-flex justify-content-center align-items-center">
    <!-- 减 1 的按钮 -->
    <button type="button" class="btn btn-light btn-sm">-</button>
    <!-- 购买的数量 -->
    <span class="number-box">1</span>
    <!-- 加 1 的按钮 -->
    <button type="button" class="btn btn-light btn-sm">+</button>
  </div>
</template>

<script>
export default {}
</script>

<style lang="less" scoped>
.number-box {
  min-width: 30px;
  text-align: center;
  margin: 0 5px;
  font-size: 12px;
}

.btn-sm {
  width: 30px;
}
</style>

<template>
  <div class="number-container d-flex justify-content-center align-items-center">
    <!-- 减 1 的按钮 -->
    <button type="button" class="btn btn-light btn-sm">-</button>
    <!-- 购买的数量 -->
    <span class="number-box">1</span>
    <!-- 加 1 的按钮 -->
    <button type="button" class="btn btn-light btn-sm">+</button>
  </div>
</template>

<script>
export default {}
</script>

<style lang="less" scoped>
.number-box {
  min-width: 30px;
  text-align: center;
  margin: 0 5px;
  font-size: 12px;
}

.btn-sm {
  width: 30px;
}
</style>

<template>
  <div class="goods-container">
    <!-- 左侧图片 -->
    <div class="thumb">
      <div class="custom-control custom-checkbox">
        <!-- 复选框 -->
        <input type="checkbox" class="custom-control-input" id="cb1" :checked="true" />
        <label class="custom-control-label" for="cb1">
          <!-- 商品的缩略图 -->
          <img src="../../assets/logo.png" alt="" />
        </label>
      </div>
    </div>
    <!-- 右侧信息区域 -->
    <div class="goods-info">
      <!-- 商品标题 -->
      <h6 class="goods-title">商品名称商品名称商品名称商品名称</h6>
      <div class="goods-info-bottom">
        <!-- 商品价格 -->
        <span class="goods-price">￥0</span>
        <!-- 商品的数量 -->
      </div>
    </div>
  </div>
</template>

<script>
export default {}
</script>

<style lang="less" scoped>
.goods-container {
  + .goods-container {
    border-top: 1px solid #efefef;
  }
  padding: 10px;
  display: flex;
  .thumb {
    display: flex;
    align-items: center;
    img {
      width: 100px;
      height: 100px;
      margin: 0 10px;
    }
  }

  .goods-info {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    flex: 1;
    .goods-title {
      font-weight: bold;
      font-size: 12px;
    }
    .goods-info-bottom {
      display: flex;
      justify-content: space-between;
      .goods-price {
        font-weight: bold;
        color: red;
        font-size: 13px;
      }
    }
  }
}
</style>

<template>
  <div class="header-container">标题</div>
</template>

<script>
export default {}
</script>

<style lang="less" scoped>
.header-container {
  font-size: 12px;
  height: 45px;
  width: 100%;
  background-color: #1d7bff;
  display: flex;
  justify-content: center;
  align-items: center;
  color: #fff;
  position: fixed;
  top: 0;
  z-index: 999;
}
</style>