"Mega Castle Build" 是一张方块建造游戏视频的 YouTube 缩略图，采用多彩的体素风格。带绿描边的方块白字叠在左边，右边是一座蓝屋顶、带瀑布的巨大像素城堡，在夕阳天空下发光。可以换成你自己的建筑和钩子词。

Create a finished 16:9 YouTube thumbnail at 1824 × 1024 px, designed to read instantly at phone size. Use a vivid voxel pixel-art register throughout: crisp square-pixel edges, chunky block geometry, bright sunset color, clean high contrast. Render only this exact text: “MEGA CASTLE BUILD”. Set it as the sole headline, stacked across three lines on the left half, in huge custom block-built capitals: thick uniform strokes, squared corners, compact spacing, solid white faces, a broad saturated green outline, and a short dark pixel shadow for separation. Keep every letter fully inside the safe margins. On the right, show a gigantic, unmistakable voxel castle built from colorful square blocks, with tall towers, crenellated walls, a central gate, and small glowing window pixels. Place a large orange-pink pixel sun behind the towers; use a saturated sunset sky transitioning from golden yellow to coral and violet, with a few square cloud clusters. Add subtle pixel-scale ground blocks at the bottom. Keep the text readable against a darker patch of sky, with the castle as the dominant scene prop. Preserve a clear, low-detail area in the bottom-right corner for YouTube’s video-length overlay; put no words, faces, or important castle details there. No extra text, logos, channel name, play button, interface graphics, timestamp, or progress bar. Sharp pixel edges, rich saturated color, strong separation between foreground and sky.