yanzong/public/store/static/UEditor/themes/iframe.css

/*可以在这里添加你自己的css*/
* {
  max-width: 100% !important;
}

body {
  font-size: 14px;
}

a {
    color: #3284e6;
    word-break: break-all;
    text-decoration: none;
}

p {
  margin: 0
}

img {
  display: block;
}