Problem with 3 or more level of tree-view UI on Mobile

I had come with a problem with review/summary screen on phone that requires the information to have 3-5 level of tree-view. Generally on mobile phone UI, nested information will be shown on another screen but because this is a review/summary screen that user will be able to review without any information hidden on another screen (user might miss it)

Any good suggestion for a design pattern for this? I find accordion gets too complicated and traditional tree view indentation limits horizontal space.