哎呀！

This tool splits a PDF file into multiple PDFs based on its chapter structure.

Bookmark Level: Choose the level of bookmarks to use for splitting (0 for top-level, 1 for second-level, etc.).

Include Metadata: If checked, the original PDF's metadata will be included in each split PDF.

Allow Duplicates: If checked, allows multiple bookmarks on the same page to create separate PDFs.