The reason should still be the problem of QQ reading documents. When previewing, the reading is incorrect, and the main contents can be displayed normally, but some typesetting and tables will be abnormal. This is a problem with QQ ontology, so it is recommended to use corresponding professional software.

Maybe you opened it in the wrong way, so you should open it with the correct software. If it is only a preview, the display may be incomplete. In general, the files on the computer and the mobile phone are the same.

Different pages send different pages to the client by judging the browser UA. When accessing, judge according to the type of equipment. When it is judged as a mobile phone, redirection is used, or the data received by the mobile phone and the computer are different.