High-end 3D breakthrough commercial poster design

A professional high-end graphic design advertisement composition on a pure solid white canvas. Centered is a perfectly symmetrical, large solid rounded square (not a hollow frame). The entire interior of this square is filled with a smooth, vibrant color gradient fading from [Top-Left Color/Hex] to [Bottom-Right Color/Hex]. A [Description of Character] is positioned such that the bottom of their torso is perfectly flush and aligned with the very bottom edge of the square, leaving no thick colored border visible beneath them. Crucially, the person and their clothing maintain natural, realistic colors and textures, illuminated by professional studio lighting that is independent of the background gradient (preventing any color cast on their skin or clothes). They are firmly and realistically gripping [Product Description]. Crucially, the top of their head and hair break the top boundary of the square, partially overlapping the white background. Their hands and the [Product Name] also break the side boundaries for a powerful 3D breakout effect, extending onto the white canvas. Typography Layout: At the top, in the white space distinctly above the square with a clear gap, is the [Font Style] brand text '[Brand Name]' in [Top Text Color]. In the bottom-right corner, layered directly on top of the gradient inside the square, is a block of small, thin, clean [Bottom Text Color] descriptive text: '[Slogan/Tagline]'. The lighting is [Lighting Type: e.g., Sharp/Soft], crisp, and commercial, emphasizing the textures of both the subject and the product.