Square video, 6 seconds, aspect 1:1. Animation: morph (morphing) "7" → "8", smooth continuous deformation, no sudden shape jumps. Object: vivid 3D digit “7”, glossy, solid thickness as an extruded sign, then fully transforms into digit “8”. Material of “8”: dense arrangement of crystal rhinestones + mirror sequins (small-scale sparkle), realistic microtexture, accurate reflective specular, strong but controlled glitter. Reflections: digit reflects on a polished surface (mirror/glass floor). Correct specular highlights and soft reflections; reflections of rhinestone/sequin elements appear on the surface; slight physically-plausible refraction component. Scene: dark neutral gradient background, clean frame, no text, no logos. Camera: smooth dolly-in (subtle push-in) + slight side parallax; stable focus on the digits. Lighting: studio lighting with key + rim, high-specular illumination, crisp crystal glints on curved edges and seams. Quality: photoreal / 3D render, ultra-detailed, high resolution, sharp edges, clean look. Timing: transformation happens mid-clip; strongest sparkle/highlight moment at the transition point. Output constraints: square framing consistency, no flicker. Negative prompt: text, logos, watermark, extra symbols, extra digits, unreadable shapes, broken geometry, blur, flickering, noise, artifacts, camera shake, extra objects/people, messy edges.