Cosmic Milestone Celebration Poster

Prompt

A vertical poster design with a deep blue cosmic theme. The background features a stunning view of Earth's horizon from space, with the Milky Way galaxy visible in the upper portion and ocean waves below reflecting light. A large luminous ring or halo arcs across the composition, displaying a rainbow spectrum on its inner edge. In the center, massive 3D metallic chrome text reads "4000+" with reflective surfaces showing the cosmos within. Top left corner displays "DeepBlue深藍" branding text. Small vertical Chinese text appears on the left side reading "AI 創作 Prompt 靈感". Top right shows "ONLINE" with a cursor icon. Bottom right contains "THANK YOU FOR BEING HERE" and "感謝每一份關注". Bottom left has a signature-style "DeepBlue" logo with a blue dot. Bottom right corner reads "KEEP CREATING SEE YOU BEYOND 4000+". The overall aesthetic is sleek, futuristic, and celebratory with cinematic lighting.