带彩色地灯的空房间绿幕背景墙图片

Help me generate an image: The stage background of the domestic large language model launch event is fully covered with pure green without light and shadow changes, convenient for later background removal and content replacement, completely unobstructed, an empty minimalist stage from a front view, a deep gray floor paired with purple-blue gradient atmospheric lighting for a futuristic feel, the main subject centered in the composition occupying three-quarters of the frame without going out of frame, 16:9 landscape, realistic tech launch event photography style.