Prompt d’image
Create a vertical 3:4 premium product render on a completely black background. Center a surreal folding smartphone object whose four triangular blue display surfaces converge at a single precise point slightly above the canvas midpoint. Its silhouette resembles a broad butterfly or four pointed folded paper fortune teller, with four rounded outside tips at upper left, upper right, lower left and lower right. The overall object occupies about four fifths of the canvas width and three fifths of its height, leaving generous empty black space above and below. Each outer diagonal wing is bordered by a thin polished silver smartphone frame with dark inset seams; show elongated side buttons along both upper diagonal silver rails. The blue screens fold inward into crisp dark central valleys and catch luminous diagonal bands of icy white, cobalt and pale blue, with a soft warm bronze reflection on the lower wings. Keep the left and right sides closely symmetrical and the central crossing extremely sharp. The top edge forms a deep downward V toward the central spine, and the lower edge rises into an inverted V. Use smoothly curved metallic outer corners, glossy glass planes and precise studio strip reflections. The object floats without a pedestal or visible cast shadow. No visible icons, logo, text, open conventional laptop hinge or extra detached devices.