3D渲染科技感DNA双螺旋结构深蓝渐变背景插画

Ultra-realistic, scientifically accurate 3D model of a B-form DNA double helix, isolated on a deep navy blue background. The DNA should be photorealistic, showing the detailed molecular structure of the sugar-phosphate backbone in a soft white material and the base pairs (adenine, thymine, cytosine, guanine) in subtle, distinct shades of light blue, gray, and white. The helix should be sharply in focus, twisting elegantly, and illuminated by a soft, cinematic side lighting that creates gentle shadows and highlights the intricate grooves and turns of the molecule. The background is a clean, solid matte navy blue with no distractions, emphasizing the biological structure. Macro photography, extreme detail, 8K, scientific illustration.