Subject: Green-blue gradient flowing wave lines, semi-transparent lines outlining a butterfly shape. Scene: High-end real estate ecological residential promotion visual scene, no text. Style: Modern minimalist line art, simple and elegant, light luxury ethereal. Color tone: Natural green-blue gradient transition, fresh and soft, matching the ecological residence style. Light and shadow: Overall transparent and hazy soft light, smooth line edges with no hard boundaries, naturally has a lightweight and high-end atmosphere. Composition: Flowing wave lines stretch to lay the foundation, linear butterflies are interspersed among them, layout is lively and relaxed, simple and grand. Use cases: Real estate project main image poster, sales office background wall, WeChat Moments promotion image, real estate site enclosure, and promotional album base image.