加 style="display: block; padding-top: 10px; margin-left: 27px"

        <el-checkbox
          :indeterminate="isIndeterminate"
          v-model="checkAll"
          @change="handleCheckAllChange"
          >全选（{{ memberList.length }}）</el-checkbox
        >
        <!-- <div style="margin: 15px 0"></div> -->
        <el-checkbox-group
          v-model="checkedCities"
          @change="handleCheckedCitiesChange"
        >
          <el-checkbox
            v-for="(item, index) in memberList"
            :label="item"
            :key="index"
            style="display: block; padding-top: 10px; margin-left: 27px"
            >{{ item }}</el-checkbox
          >
        </el-checkbox-group>