兄弟选择器 ~

<template lang="html">
  <div class="wrapper" flex="main:center cross:center">
    <div flex="cross:center">
      <div class="peng" flex="main:center cross:center">
        我是捧哏
      </div>
      <div class="dou same" flex="main:center cross:center">
        我是逗哏
      </div>
      <div class="peng-dou same" flex="main:center cross:center">
        论捧逗
      </div>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {};
  },
  computed: {},
  created() {},
  mounted() {},
  methods: {},
  watch: {},
  components: {}
};
</script>

<style lang="scss" scoped>
.wrapper {
  height: 100vh;
  .peng {
    width: 100px;
    height: 40px;
    background: red;
    color: #fff;
    margin-right: 30px;
    order: 2;
    &:hover + .dou {
      background: blue;
      width: 500px;
      height: 500px;
      font-size: 50px;
    }
    &:hover ~ div {
      background: orange;
      width: 500px;
      height: 500px;
      font-size: 50px;
    }
  }
  .same {
    border-radius: 20px;
    color: #fff;
    font-size: 20px;
    transition: all 1s;
    font-weight: bold;
  }
  .dou {
    width: 100px;
    height: 100px;
    order: 1;
    background: red;
    margin-right: 30px;
  }
  .peng-dou {
    width: 200px;
    height: 200px;
    background: pink;
    order: 3;
  }
}
</style>

所有后面的兄弟

核心代码：&:hover ~ div { background: orange; width: 500px; height: 500px; font-size: 50px; }