Generate a highly detailed 3D model of a lion in a majestic sitting pose, with its strong, muscular body resting on the ground and its head held high. The lion should have a broad chest, powerful shoulders, and a thick, flowing mane framing its face and extending down its neck. Its eyes should be intense and expressive, with a sharp, well-defined nose and mouth. Ensure realistic fur texture, symmetrical body structure, and fine anatomical details for lifelike accuracy.