Hi, thx for your answers.
But still, something strikes me : why is it that in the Crane Style Feat Description, the benefit is split in two parts : one passive bonus that doesn't say that you have to use the crane stance, and one active bonus that says that you have to use the crane stance.
Likewise, there's a bunch of style feats that add additional use per day of stunning or elemental fists : are those extra uses per day available only when you are using the stance ?
And by the way, the Crane Style has no "Style feat" as prequisite ;-)
cyberbougret