Subject: A human wrist and forearm wearing a smart wristband, the wristband is projecting a tech-style holographic data module upwards. Scene: Dark deep blue background, the background has light vertical stripe textures, overall a virtual tech data space. Style: Futuristic sci-fi digital art style, concept visual design for a tech business theme. Color scheme: Mainly with different shades of cool blue, matched with the light tones of the wristband and human skin, creating a transparent and cool tech atmosphere. Lighting: Taking the bright cool white highlight projected by the wristband as the core light source, illuminating the holographic data module, and the remaining areas use soft and hazy dark lighting, highlighting the foreground subject and holographic content. Composition: Adopting a low-angle vertical composition, placing the wrist and the projected holographic content at the visual center of the frame, guiding the line of sight to extend upwards. Usage: Suitable for tech industry promotion, smart wearable device marketing, digital information-themed posters or concept illustrations.