圆筒形玻璃塔群的都市综合体：中央高塔与环绕裙楼

Design a riverfront mixed-use megastructure in the manner of John Portman as one tall mirrored cylinder surrounded by four shorter identical glass drums, all standing on a massive fortified concrete base of ramps and berms. Compose the symmetrical cluster reflecting a grey sky, the raw concrete podium reading as a defensive wall at ground level, a wide river in the foreground and a flat industrial skyline, cold overcast northern light, low view from the far bank, 28mm lens, architectural photography, ultra photorealistic, 8K