“LILY'S RAINBOW BIRTHDAY LET'S PARTY!”是使用 FontVibe AI 创作的彩虹文字效果。绚丽的多彩虹色渐变文字特效，色彩过渡顺滑，棱镜般的光泽与欢快的多彩排版。

Create a finished, wide horizontal kids’ birthday party banner, 16:9. Render only these exact words, with no extra lettering: headline “LILY'S”; subhead “RAINBOW BIRTHDAY”; small party line “LET'S PARTY!” Keep the headline and subhead large and immediately legible. Use bold, rounded display lettering with extreme spherical pneumatic inflation, hemisphere terminals and ultra-glossy candy lacquer. Every individual letter must contain its own complete vertical ROYGBIV gradient: red at the top, then orange, yellow, green, blue, indigo and violet at the bottom. Full-chroma rainbow colors, never one color per letter and never a gradient across the whole word. Add circular near-white specular highlights at each letter’s apex and smooth, inflated 3D edges. Arrange the copy in a centered three-tier stack across the upper two-thirds, with “LILY'S” largest, “RAINBOW BIRTHDAY” beneath it, and “LET'S PARTY!” as a small supporting line. In the lower center, show a small decorated birthday cake with rainbow icing and candles, flanked by clusters of bright balloons; keep the cake clear of the lettering. Use a bright, warm golden-hour background with amber-to-pink bokeh, scattered multicolor confetti and a few string lights. Strong warm sunlight from the upper right creates glossy highlights on the letters and cake. Maintain generous safe margins for banner printing; crisp, clean edges, polished 3D render, high color contrast, no border, no logos, no other text.