style: 使用伪元素替代单元格内阴影 fix #10867 (#13435)
* :art: style: 使用轮廓线和轮廓偏移替代内阴影 fix https://github.com/siyuan-note/siyuan/issues/10867
* :art: style: 使用轮廓线和轮廓偏移替代内阴影 fix https://github.com/siyuan-note/siyuan/issues/10867
* Revert ":art: style: 使用轮廓线和轮廓偏移替代内阴影 fix https://github.com/siyuan-note/siyuan/issues/10867"
This reverts commit d62e293926fd95b0aef8032037635e8d3b1d581a.
* style: 使用伪元素替代单元格内阴影 fix https://github.com/siyuan-note/siyuan/issues/10867