中文提示词（Prompt）：
主体与核心：
一个结构鲜明、充满未来科技感的字母“B”。其几何线条与块面，本身构成一个展示微型未来都市的框架。
视觉细节：
该字母的内部空间被构建成一个密集的赛博朋克风格微缩城市。细节包含：字母的负空间化身为纵横交错的霓虹街道，其中穿梭着微小的悬浮车辆；建筑是层层叠叠的全息广告牌与发光网格立面，闪烁着蓝色、紫色与洋红色的光芒；数据流与数字雨如同新的“植被”般在结构间流动；字母本身的材质是带有内部电路纹理的发光金属板或深色哑光合金，边缘散发着冷色调的LED光晕。
风格与技术：
整体设计充满动态、科技感与视觉冲击力。背景采用深邃的暗色调，以最大化对比并突出字母内部的绚丽光芒。采用超高清渲染，强调霓虹光的折射、金属的冰冷质感与复杂的层次细节，呈现出高端、前卫且极具概念性的数字艺术质感。
英文提示词（Prompt）：
Subject & Core:
A structurally defined, futuristic letter “B” imbued with technological aesthetic. Its geometric lines and planes form a frame showcasing a miniature metropolis.
Visual Details:
The interior space of the letter is constructed as a dense cyberpunk-style miniature city. Details include: the negative space of the letter transformed into a crisscross of neon-lit streets with tiny hover vehicles; buildings are stacked layers of holographic billboards and glowing grid facades emitting blue, purple, and magenta light; data streams and digital rain flow between structures like new-age flora. The letter itself is made of luminous metal plates with internal circuit patterns or dark matte alloy, edged with cool-toned LED halos.
Style & Technique:
The overall design is dynamic, technological, and visually striking. Set against a deep, dark background to maximize contrast and highlight the radiant glow within the letter. Rendered in ultra-high definition, emphasizing neon light refraction, cold metallic textures, and intricate layered details, resulting in a premium, avant-garde, and highly conceptual digital art quality.