夏空の下、日差しあふれる緑の丘でくつろぐ少年

Anime-style cinematic illustration of a young boy lying on a gentle green hillside, hands behind head, relaxed posture, staring at the sky, lone large tree with thick branches and fresh green leaves beside him, bright blue sky filled with fluffy white clouds, soft sunlight, peaceful summer afternoon mood, calm and nostalgic vibe, slow life feeling, wind gently moving grass and leaves, nature-focused composition, vibrant yet soft color palette, painterly anime background style, Studio Ghibli–inspired atmosphere, emotional calm and freedom, clean line art, high detail, smooth shading, depth and perspective, 4K quality, vertical frame, no text, no watermark, perfect background for chill phonk or lofi music