根据进度自动切换内容 预览 哔哩哔哩 <iframe src="//player.bilibili.com/player.html?aid=728645067&bvid=BV1gS4y1E7wP&cid=780064959&page=1" scrolling="no" border="0" frameborder="no" framespacing="0" allowfullscreen="true"> </iframe> 请在 gitpage 中浏览本页