简约卡通扁平化风格跃出水面的鱼水波纹动态场景现代插

A circular logo， with a fluid and dynamic line representing the Yangtze River as the background. It features a simplified image of a finless porpoise， with 12 dots symbolizing 12 cities. The design is minimalist and symmetrical， primarily following the style of Kenya Hara. The color scheme is in shades of blue and green，扁平风格，插画，网页插画，平面