古老頭盔的深海潛水員手持神秘文物，被冷藍色水下光線和溫暖反光照亮

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Cinematic hyperreal close-up portrait of an antique deep-sea diver in a weathered brass diving helmet holding a dark mysterious square artifact directly in front of the face with intent. The object is centered and blocks most of the visor, appearing as a flat near-black charcoal square with a subtle vertical gradient, sharp clean edges, and no markings. Show the diver’s wet gloved hands at the bottom foreground, fingers curled around the artifact, with realistic skin/leather texture, droplets, grime, and specular highlights. The helmet fills the frame: aged bronze and blackened metal, round rivets, ornate circular side fittings, corroded seams, scratches, algae-like residue, and a glass porthole rim barely visible around the square. Illuminate the scene with cold blue underwater light from the left with warm amber reflections along the brass rim. Add suspended bubbles, drifting particles, and murky underwater haze throughout the frame. The mood is tense and enigmatic; any visible eyes behind the glass should convey focused obsession and dread. Use shallow depth of field, macro-level detail, cinematic contrast, teal-blue color grading, glossy wet surfaces, volumetric underwater ambience, no text, no watermark, vertical 4:5 composition.