国家美术馆入口序列：地下大厅与轴线

Design a national museum entrance inspired by I. M. Pei. Create a monumental yet restrained arrival sequence featuring a transparent geometric pavilion, underground orientation hall, reflecting pools, and perfectly aligned circulation axes that connect historic and contemporary architecture. A spiral stair and open lift descending from a glazed pavilion into a daylit underground concourse, beige stone walls and floor, sightlines aligning exactly with historic wings above, visitors moving along the axis, soft daylight falling from the pavilion far overhead, wide view from the concourse floor, 24mm lens, architectural photography, ultra photorealistic, 8K