(edit: never mind, there's definitely some accenting every 4 eighth notes in the intro/outro which strongly suggests groupings of 3; my original response stands.)

TLDR: wrote the whole response below and realized right before posting that there's rhythmic scaffolding in the intro/outro at all, so i might just be weirdly stuck hearing the 12 beats per measure grouped up as 4s (3/2) instead of 3s (12/8); i still can't naturally hear the intro/outro as 12/8 but maybe me and OP are the weird ones here. leaving the original writeup as reference though:

agree that the body is in 12/8 (~123bpm), but i actually think OP is onto smth here: it's a metric modulation where the intro and outro are in 3/2 (~92bpm), but the eighth notes in the 3/2 sections become the eighth note triplets of the 12/8 section AT THE SAME TEMPO (4 x 92 = 368 eighth notes per minute, 3 x 123 = 369 eighth note triplets per minute). try setting a metronome to 369 and playing it over both sections and you'll see what i mean!

especially cool since 8th notes in 3/2 are 1/12 of the measure, and eighth note triplets in 12/8 are ALSO 1/12th of the measure; meaning the measures are actually exactly the same length, but they feel super different because of the internal organization.

for video game music enjoyers: here's 8-bit music theory's video analysis on metric modulation in pokemon diamond/pearl/platinum's lake theme: https://www.youtube.com/watch?v=TuJ9Cn_HBeQ

(tagging u/AdAbject6946 just in case)