“HAPPY BIRTHDAY DAD CELEBRATING YOU TODAY”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 vertical birthday card, 3:4 ratio, designed for print and phone sharing. Render the exact text with perfect spelling and clear hierarchy: 1. "HAPPY" — small uppercase sans-serif eyebrow, centered at top. 2. "BIRTHDAY" — dominant oversized modern brush-script headline across the upper-middle. 3. "DAD" — even larger modern brush-script word centered below, the visual focal point. 4. "CELEBRATING YOU TODAY" — small uppercase sans-serif support line centered beneath. The headline lettering must be custom hand-painted modern brush script: connected, fast flowing letterforms, broad loaded-brush downstrokes and narrow upstrokes, lively bouncing baseline, slightly irregular dry-brush drag at lifted stroke ends, rounded paint edges, long swashes that do not obscure any text. Paint "BIRTHDAY" in saturated tangerine and hot pink; paint "DAD" in vivid turquoise with violet shadow accents. Give every headline letter a crisp thick white sticker-like outline, small white highlight streaks, and a soft deep-violet offset shadow for separation. Background: a bright saturated candy-color gradient, hot pink at upper left blending through tangerine into turquoise and violet at lower right; no pale wash, no dark stage. Build an energetic frame of glossy helium balloons: clustered hot-pink, turquoise, sunny-yellow, violet, and orange balloons at both upper corners and along lower left/right edges, with curled ribbons pointing inward. Dense multicolor paper confetti bursts around the outer perimeter, leaving clean breathing room around the text; add star-shaped sparkles, tiny white glints, warm bokeh dots, and diagonal light streaks. Centered composition, generous safe margins, sharp readable typography, high-resolution greeting-card illustration, clean print-ready edges. No people, no extra words, no logos, no watermark.