“SWEET 16”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。

a bright, joyful birthday celebration scene. BACKGROUND: light and airy — soft white, warm cream, or a gentle pastel wash (blush, mint, sky-blue, buttercream) with a subtle luminous gradient and soft party bokeh; bright and cheerful, never dark, never muddy. Soft daylight-bright illumination with a gentle warm lift, colors kept clean and fresh. ATMOSPHERE (always): a lively but tasteful scatter of multicolor confetti and a few clustered balloons framing the composition, light glints and soft sparkle — festive and happy, with clear breathing room around the text so it never looks cluttered. LETTERFORM COLOR: when the chosen font defines its own color keep it; otherwise cheerful saturated party colors with a clear hierarchy — one or two dominant hues plus accents, never a muddy single tone and never a garish rainbow smeared over every letter. GROUND: no dark stage — the text floats in a bright celebratory space. LETTERFORM PRIORITY: when the chosen font carries its own treatment (balloon, bubble, foil, script, sticker), that font treatment takes absolute priority and owns the letters; this style governs only the bright party light, confetti, balloons and palette — never the letter shapes. FALLBACK MATERIAL: if the font carries no material of its own, render the letters as clean glossy party lettering in one or two cheerful saturated colors with a soft highlight on the bright confetti background, so the happy birthday energy always reads. Render the exact text provided, with no extra or altered words. A smartphone screen showing 'SWEET 16' in glossy balloon letters just generated, held up at a bright sunny party with pastel balloons and a cake softly out of focus behind. The phone and its high-impact balloon text are the crisp focal point. 9:16 vertical.