Why does the Audi A7 have a sloping roofline?

I have noticed that the Audi A7 has a sleek and distinct sloping roofline. What is the purpose of this design element? Does it affect the performance of the car in any way?

The sloping roofline of the Audi A7 is part of its signature design, emphasizing the sporty and luxurious aesthetic of the car. This design element also helps improve the car's aerodynamics at high speeds.

The sloping roofline of the Audi A7 is also functional, as it allows for better headroom and visibility for the rear passengers.