一张 lo-fi 学习直播用的背景，采用雨夜温馨风格。深色木桌上摆着暖光台灯、一摞书、笔筒、马克杯和绿植，窗玻璃上雨水往下流，窗外是虚化的城市灯火。中间那块深色区域专门留给你的摄像头。

Create a finished 16:9 stream background for a lo-fi study stream, composed for 1824 × 1024 px. Show a quiet desk beside a large rainy window at night, viewed straight on from seated eye level. Outside the window: soft, sparse rain trails on glass and a distant city reduced to a few dim, defocused lights. Inside: warm amber light from a shaded desk lamp placed at the far left edge, falling across a small stack of books and a closed notebook; a modest plant and a mug sit low at the far right edge. Keep all props and brighter highlights near the outer edges and lower corners. Reserve the central 40% of the frame as a broad, uninterrupted, low-detail area of dark muted wall and softly graded shadow, suitable for a webcam or VTuber model; no objects, bright spots, patterns, or text in that area. Keep the bottom-center mostly clear as well. Use deep blue-charcoal shadows, muted slate window tones, warm amber lamp light, restrained film grain, soft realistic materials, gentle volumetric light, and low contrast in the center. Calm, uncluttered scene designed to remain comfortable behind a live stream for hours. No lettering, logos, symbols, interface elements, people, or camera equipment.