Create a stunning illustration in vector format, depicting the panoramic view of the Arosa mountains at sunrise. Utilize flat design techniques to portray the landscape with bold shapes and vibrant colors. Focus on capturing the ethereal beauty of the morning light as it illuminates the mountain peaks and valleys. Incorporate intricate details and textures to add depth and visual interest to the illustration. Experiment with composition to create a balanced and harmonious composition that draws the viewer's eye towards the radiant sunrise.