"Create a logo for a brand named 'Xin Liu' (心流) that embodies the concept of 'flow' in psychology, representing a state of deep focus and inner peace. The logo should have a modern and serene aesthetic, with the following elements: - Color scheme: A soothing, gradient blue that conveys tranquility and depth. - Typography: A clean, sans-serif font that is easy to read and conveys modernity. - Graphics: Incorporate fluid lines or wave shapes to symbolize the continuous and dynamic nature of flow. Consider an abstract heart shape composed of flowing lines or a circular pattern representing infinity and the eternal state of flow. The layout should integrate the text 'Xin Liu' harmoniously with the graphic element, either above, in the center, or below it, depending on the design that provides the best visual balance. Ensure the overall design is smooth, without sharp edges, to maintain harmony. The final logo must be adaptable to different sizes, from large billboards to small social media icons, and should be provided in various formats including vector (for scalability) and raster (for web and print use)."