关于这个设计

A wide chest print: a retro boxy camper van drives from left to right across the middle of the design, drawn flat in three-quarter view with a rounded roof rack, round headlights and a small bunch of balloons tied to the rear bumper trailing behind it. A dashed road curves out from under the van's wheels and loops around to form the underline of the headline. Above the van, in a chunky retro script with a long tail, sits "Birthday Road Trip", and below the road line in small spaced caps "MILES BEHIND US, CAKE AHEAD". Three cute stylized cartoon women lean out of the van's windows as friendly cartoon-avatars standing in for a customer photo (NOT photorealistic), waving. The three handwritten names "Ivy", "Thea" and "Elodie" are lettered along the van's side panel like a painted decal. Sunset orange, dusty turquoise, warm sand and deep brown on white. Text, each spelled correctly and appearing exactly once: "Birthday Road Trip", "MILES BEHIND US, CAKE AHEAD", "Ivy", "Thea", "Elodie". Style: retro 70s road-trip flat illustration with warm faded tones, wanderlust and nostalgic, high-contrast and print-ready.