“RAINBOW”是使用 FontVibe AI 创作的彩色玻璃文字效果。厚实的实心玻璃字母，每个字母一种宝石色，在明亮的白色影棚地面上投出彩色光斑和焦散光扇。

sculpted as thick solid colored glass letterforms — each letter formed from deep-saturated jewel-tone glass with visible material weight and depth. The glass holds intense color throughout its body: ruby red, sapphire blue, emerald green, amber gold, cyan, or violet — color set by scene context. Top surfaces carry sharp mirror-bright specular highlights; side edges reveal full glass thickness with bright refracted light lines. Internal light scatters creating subsurface color gradients — luminous at the core, deeply saturated at edges. Caustic light patterns (rainbow-edged refraction fans) radiate from letter bases onto surrounding surfaces. Style may range from smooth precision-cut optical glass sculpture (modern) to segmented cathedral stained glass (traditional lead-came divided jewel panes) — determined by font choice. The defining quality: saturated transparent color glowing with transmitted light, like jewels held to sunlight. Square 1:1. A modern smartphone displayed face-down on a white marble surface, showing a custom phone case with RAINBOW as colored glass letters printed across the back. R=ruby, A=amber, I=yellow, N=emerald, B=sapphire, O=indigo, W=violet spectrum sequence. The glass effect typography on the phone case looks premium and vibrant against the white case material. Clean product mockup shot. The carrier communicates: rainbow glass font used for custom phone case or merchandise printing.