ad-manage/public/ueditor/themes/iframe.css

/*可以在这里添加你自己的css*/
.audio_iframe {
  position: relative;
  font-size: 14px;
  color: #333;
  display: inline-block;
  border: 1px solid #e7e7eb;
  padding: 9px 6px 9px 60px;
  overflow: hidden;
  width: 100%;
  height: 60px;
  background: #fcfcfc
    url(http://res.wx.qq.com/mmbizwap/zh_CN/htmledition/images/icon/appmsg/audio/icon_audio_unread26f1f1.png)
    no-repeat 16px 16px;
  background-size: 18px auto;
}
.audio_iframe::before {
  position: absolute;
  left: 60px;
  top: 10px;
  color: #333;
  content: attr(name);
}
.audio_iframe::after {
  position: absolute;
  right: 10px;
  top: 7px;
  color: #8d8d8d;
  content: attr(data-length);
}
mp-miniprogram {
  border-radius: 8px;
  background-color: #f7f7f7;
  height: 200px;
  width: 200px;
  margin: 0 auto;
  display: block;
  position: relative;
}
mp-miniprogram::before {
  content: '小程序卡片请用预览查看';
  position: absolute;
  top: 50%;
  left: 50%;
  display: block;
  transform: translate(-50%, -50%);
  width: 100%;
  text-align: center;
}