How does Audi A8's all-wheel steering system work?

I've heard that the Audi A8 offers an all-wheel steering system, but I'm not sure exactly how it functions. Can someone explain it to me?

The Audi A8's all-wheel steering system works by adjusting the rear wheels to turn in the same direction as the front wheels at high speeds, improving stability and handling. At low speeds, the rear wheels turn in the opposite direction, allowing for tighter turns.

The Audi A8's all-wheel steering system uses electronic actuators to control the movement of the rear wheels, improving agility and maneuverability on both straight roads and in tight corners. It also enhances stability on uneven roads.