“Happy 50.5 birthday Heidi !!”是使用 FontVibe AI 创作的生日文字效果。彩虹条纹的圆胖大写字母带清晰白描边，四周是彩纸屑和气球簇，背景是饱和的粉色到青绿派对渐变。

Create a finished, extra-wide 21:9 birthday party banner. Render only these exact words, spelled and punctuated exactly, with no additional text: “Happy” / “50.5” / “birthday” / “Heidi !!”. Arrange them to read “Happy 50.5 birthday Heidi !!”: “Happy” small at upper left; “50.5” as the dominant oversized line; “birthday” below it, followed by “Heidi !!” in a strong, clear supporting line. Keep all type within generous banner-safe margins and highly legible at a distance. Use firm, structured, heavy geometric display letterforms, near-square proportions, even strokes, open counters, crisp joins, and gently softened corners—not rounded, inflated, or balloon-shaped. Give the letters a smooth glossy coral-to-tangerine finish, one sharp specular highlight, a thin crisp white keyline, and a soft drop shadow. Stage the text over a bright, highly saturated hot-pink-to-turquoise party gradient with luminous party lighting. Place a decorated birthday cake with unlettered candles as a distinct visual subject on the right, clear of the text. Frame the composition with generous clusters of vivid balloons, dense multicolor confetti, sparkling glints, and a few bright light streaks; keep the central text field clean and high-contrast. Bright, punchy, polished 3D illustration; crisp edges and readable typography. No pale pastel wash, no dark stage, no extra words or numbers.