[Solution] The inner div cannot stretch the outer div (clear inner div float)

http://www.cnblogs.com/xiaoxiao2014/p/5474620.html

<!-- Main content -->
    <section class="content">
      <router-view></router-view>
      <div class="clearfloat"></div>
    </section>
<!-- /.content -->

<style lang="stylus" scoped>
  .clearfloat
    clear both
    height 0
    font-size 1px
    line-height 0px
</style>