[verb (plain)] + ので [i-adj (plain)] + ので
[na-adj] + な + ので [noun] + な + ので
Polite variant:
The ~ので structure is used to indicate reason or cause, similar to ~から, but it conveys a softer, more polite tone.
~ので implies a logical or objective connection between the reason and the result, whereas ~から feels slightly more subjective or emotional.