<view id="ideaBox">
  <textarea class='areaInput' placeholder-style="font-size: 28rpx;color: #999;" value="{{idea}}" bindinput='inputchange' maxlength="1000" placeholder="请简要描述你的问题和意见" />
</view>
<view id="conLength">还可以输入{{1000-contentLength}}个字符</view>
<view id="submitBtn">
  <button id="submit" bindtap='submit'>提交</button>
</view>