将Maya 2025 文档制成epub电子书
https://www.autodesk.com/support/technical/article/caas/tsarticles/ts/6hGHDwrHzKBq8zd65p4LpK.html
利用Calibre从epub转mobi时，为了能自动生成目录，需在结构检测>检测章节的XPath表达式处填入：
//*[((name()='h1' or name()='h2') and re:test(., '\s*((chapter|book|section|part)\s+)|((prolog|prologue|epilogue)(\s+|$))', 'i')) or @class = 'chapter' or @class = 'head-block' or @class ='head-text']