“BIRTHDAY IN 5 DAYS!”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。

rendered as rainbow text effect — COLOR (mandatory): each individual letter must contain a complete ROYGBIV rainbow gradient top-to-bottom within itself — top=red, upper=orange, mid=yellow-green, lower=blue-indigo, bottom=violet. NOT one color per letter. NOT a gradient across the whole word. Every letter is its own complete rainbow. Full chroma Pride flag saturation — not pastel, not muted, not shifted to any single hue. LETTERFORM PRIORITY: when the chosen font carries its own treatment, that font's letterform shapes take priority and own the letters; this style always governs the color — every letter still carries its own complete top-to-bottom ROYGBIV rainbow gradient. FALLBACK MATERIAL: if the font carries no material of its own, render clean bold letters each filled with a full vertical ROYGBIV rainbow. COLOR PRIORITY: the rainbow gradient is mandatory and overrides any single font color — each individual letter is its own complete rainbow at full Pride-flag saturation. 'BIRTHDAY IN 5 DAYS!' arranged in three celebratory lines, with BIRTHDAY commanding the upper center, IN 5 DAYS! beneath in a smaller but still exuberant scale. Every individual letter contains its own complete vertical ROYGBIV rainbow, beginning vivid red at the top and passing through orange, yellow, green, blue, indigo, and violet at its base; never a single hue per letter and never one gradient shared across the phrase. The letters are plump candy-gloss balloon forms with rounded inflated volume, crisp colorful edge definition, and brilliant warm-white specular highlights along their upper-right curves. Center the typography at roughly 76% of the square frame, leaving buoyant breathing room around it. Set it against a joyful birthday venue feature wall washed in sunny coral-pink and sky-blue light, with a canopy of warm fairy string lights dissolving into golden circular bokeh. Float glossy pink, gold, red, and cobalt balloon clusters at the outer corners, kept secondary to the text. A scatter of tiny rainbow confetti, metallic streamers, and a few curled ribbons gathers below the words. Bright golden-hour light, high-chroma Pride-festival color energy, polished invitation-ready celebration.