A vibrant, vector-style illustration for an event announcement

A vibrant, vector-style illustration for an event announcement, featuring four people (two men and two women) enjoying Nordic walking by a serene mountain lake. The scene is set in a picturesque mountainous landscape with a clear, sparkling lake in the background. The characters are placed in the foreground, enjoying a refreshing morning walk under a bright, clear sky with the sun casting a gentle, invigorating light. The image should exude a fresh and lively atmosphere, without any unnatural buildings or litter. The focus is on a cheerful, health-promoting activity in a beautiful, natural setting.

worst quality, low quality, bad anatomy, bad hands, bad body, missing fingers, extra digit, fewer digits