Github Style Alert cannot show in HTML or PDF

[HoeYeungHo]

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Describe the bug I know Github Style Alert did not adapt to i18n, so I followed the documentation to modify the CSS file, and all of this worked in typora, which is great! But when I export the markup to an HTML or PDF file, it has an effect on the style of Github Style Alert, but it does not have an effect on its text content.

• Effectively modifying styles

  .md-alert.md-alert-tip {
      border-left: 4px solid rgb(31, 136, 61);
      padding: 10px 15px;
      color: var(--text-color);
      background-color: rgba(31, 136, 61, .02);
      border-radius:0px 5px 5px 0px ;
  }
  

• The modification of text content only works in typora and is ineffective in exported HTML and PDF files

  .md-alert-text-tip .md-alert-text-container:after {
      content: "面试真题";
  }
  

Screenshots / Screencasts

Desktop (please complete the following information):

Windows 11 64bit

Typora Version

Typora 1.8.10