30 秒影片：女性登山車手沿山脊下坡，越過樹根與岩石，最後停在俯瞰山谷的觀景點

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超寫實的 30 秒 16:9 登山車動作影片。全程保持同一位女性騎士、同一輛自行車、服裝、越野路徑與日光照明。呈現她從山脊開始，自然地加速下坡，穿越樹根、岩石、碎石與狹窄彎道，並具備逼真的煞車、平衡、輪胎抓地力與避震器運動。最後她駛出森林，在景色優美的山谷觀景點停下。電影感跟拍鏡頭、逼真的戶外物理效果、自然的森林環境音、自行車聲、風聲與呼吸聲。不要對話、CGI 質感、不可能的跳躍、瞬間移動、變形的身體、文字、標誌或浮水印。

Ultra-photorealistic 30-second 16:9 mountain-bike action video. Same female rider, bike, clothing, trail, and daylight throughout. Show her starting on a mountain ridge, accelerating naturally downhill, navigating roots, rocks, gravel, and tight corners with realistic braking, balance, tire traction, and suspension movement. Finish as she exits the forest and stops at a scenic valley viewpoint. Cinematic tracking shots, realistic outdoor physics, natural forest ambience, bike sounds, wind, and breathing. No dialogue, CGI look, impossible jumps, teleportation, distorted anatomy, text, logos, or watermark.