Hi Mohd Fahad,
i gone through the note
http://service.sap.com/sap/support/notes/2150460
Known CSS issues:
- CSS pseudo-elements are not supported, for example ::before, ::after. Therefore, components styled using pseudo-elements will not be exported exactly as they appear.
- Background images may not be exported.
- The CSS overflow property is not supported. Therefore scrollbars within the application may not be exported.
Regards,
Subhash