户外阳光青年男孩

生成一张 4:5 竖版户外阳光青年男孩半身肖像。主体是一位 18 岁左右的亚洲男孩，在夏日校园篮球场旁，穿浅蓝运动背心和白色 T 恤，肩上搭白色毛巾，怀里抱篮球，微笑看向镜头。必须完整显示头部、五官、肩膀和上半身，头顶留白自然。背景为树荫、球场围网和清爽下午阳光，色调草绿、天蓝、白色和暖阳。无文字、无 logo、无水印。

Create a 4:5 vertical sunlit outdoor half-body portrait of a young man. The subject is an Asian boy around 18 beside a summer campus basketball court, wearing a light blue jersey over a white T-shirt with a white towel over his shoulders, holding a basketball and smiling at the camera. Show the full head, facial features, shoulders, and upper body with natural headroom. Use a background of trees, court fence, and fresh afternoon light in grass green, sky blue, white, and warm sunlight. No text, logo, or watermark.