Create a dynamic 4K resolution close-up portrait of Black Widow

Create a dynamic 4K resolution close-up portrait of Black Widow, the fierce Marvel superheroine, capturing her strength and determination: Visualize Black Widow with her striking features: her red hair styled in a sleek, shoulder-length bob or pulled back into a practical, tactical ponytail. Her eyes, sharp and focused, should reflect her unwavering determination and strategic mind. Dress Black Widow in her iconic black tactical suit, featuring intricate details such as reinforced armor, utility belts, and the red hourglass symbol on her belt. The suit should appear sleek and functional, emphasizing her agility and combat prowess. Set the scene against the backdrop of a high-tech, futuristic environment, perhaps a S.H.I.E.L.D. headquarters or a cityscape at dusk, with neon lights casting dramatic shadows. Include elements such as holographic displays or glimpses of advanced technology to enhance the modern, action-packed atmosphere. The color palette should be dark and intense, with shades of black and deep reds, contrasted by the cool blues and silvers of the high-tech background, highlighting Black Widow's stealthy and formidable presence. Black Widow's expression should convey a blend of determination, focus, and a hint of vulnerability, capturing her complex character. Her gaze should be piercing and resolute, embodying her role as a master spy and a skilled combatant. This portrait aims to celebrate Black Widow as a symbol of strength, intelligence, and resilience, capturing her iconic features and the high-stakes, action-packed world she inhabits in the Marvel Universe.