紫色灯光下的观众席与绿幕舞台图片

Help me generate an image: In the center of the stage at an AI large model launch event, a huge widescreen displays pure green with no shadows or text, convenient for later cut?out and content replacement. The dark venue has audience seats neatly arranged with no people. At the top of the stage, professional truss spotlights emit purple?blue cold light, creating a technological atmosphere. The main subject is centered, occupying three?quarters of the frame, fully within the picture, 16:9 landscape, realistic AI launch event photography style.