Prompt:

Design a logo named "观心海" centered around water droplet as the main element. The logo should symbolize tranquility and mindfulness, incorporating a water droplet that seamlessly merges with oceanic waves or ripples to evoke the concept of a vast, calm sea of the mind. Use a lush forest green as the dominant color to emphasize nature, growth, and serenity. Avoid the inclusion of human figures or any human elements. The overall design should be clean, modern, and harmonious, highlighting the purity and depth associated with water and the expansive calmness of the sea.