Japanese-style cool summer semi-realistic illustration, main subject xxx

Japanese-style cool summer semi-realistic illustration, main subject is 【xxx】, 9:16, low-angle upward view, subject occupies the center of the frame. Deep high-saturation cobalt blue sky, a few thick white clouds, strong blue-and-white contrast. Clear-day hard light from the upper side, cool white highlights, blue-gray shadows, skin and clothing with blue environmental reflections. Thick painting combined with fine line art, exquisite and visible brushstrokes, cold and clear facial features, hair strands slightly drifting, loose and pure white clothing with folds and cool blue reflections. Overall cool, quiet, lonely, free, summer transparency, like high-end Japanese literary illustration and poetry cover. No text, no watermark, no logo, no photographic feel, no 3D.