“OPEN DAY SATURDAY SATURDAY 26 SEPTEMBER · 10 AM–2 PM ALL WELCOME”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 horizontal outdoor gate banner, 3:2 ratio, designed for fast reading from a driveway. Print this exact text, with no extra wording: "OPEN DAY" "SATURDAY" "SATURDAY 26 SEPTEMBER · 10 AM–2 PM" "ALL WELCOME" Composition: a clean white vinyl banner stretched between two pale timber gateposts. The headline "OPEN DAY" occupies the upper 38% of the banner, centered and extremely large; "SATURDAY" occupies the central 32%, centered and nearly as large. Design both headline lines as bold rounded display lettering with extreme pneumatic 3D inflation, spherical convex volume, hemisphere-rounded terminals, ultra-glossy candy lacquer, sharp white circular specular highlights at each letter apex. Every single letter contains its own complete vertical ROYGBIV gradient: red at top, orange, yellow, green, blue-indigo, violet at bottom; do not spread one gradient across the word and do not assign one color per letter. Add a narrow cobalt-blue outline and a soft pale-blue contact shadow for separation from the white banner. Set the date-and-time line in compact uppercase cobalt sans serif below the title; set "ALL WELCOME" in white uppercase inside a rounded violet capsule at bottom center. Frame the banner edges with glossy rainbow balloon clusters at the four corners, keeping the text zone clear: small inflated stars, circles, and curled ribbon forms. Scatter a sparse field of red, yellow, green, blue and violet confetti around the perimeter only. Bright blue sky beyond the gate, soft warm sunlight from upper right, crisp outdoor shadows, photorealistic vinyl texture, high-resolution commercial event signage, clean margins, exact legible typography.