I recently saw a Seven Star Praying Mantis school perform in public for a cultural festival, and one of their characteristics is the seven-star stance. The stance entails one of practictioner's leg sticking out straight with the heel on the ground and toe pointing upwards whilst the body weight is placed more on the back leg which is bent.

I was trying to figure out what is the purpose of this particular footwork in its applicability to defense and attack because it seems odd to stick out your leg like that, but I also wondered whether it may be a stylistic feature of this particular kung fu system.