AI Video Prompt: Mountain Waterfall Train

Create a 10-second vertical 9:16 cinematic stylized 3D animation of a classic steam train crossing a high stone railway bridge above a giant waterfall in a dramatic green mountain valley. Start with a wide establishing view showing towering cliffs, flowing waterfall, stone bridge arches, river below, blue sky and clouds. A colorful steam locomotive with red, blue and yellow sections moves smoothly across the bridge while thick white steam rises naturally from the chimney. Keep the train connected to the railway tracks and preserve realistic smoke, water flow and environmental physics. The camera smoothly follows the train with cinematic wide shots and closer side views, then ends with a wide view showing the entire mountain landscape and the train continuing its journey. Maintain consistent train design, bridge structure, waterfall, lighting and realistic 3D quality. No humans, no extra objects, no text, no watermark, no scene changes.