{
  "model": "doubao-seedance-2-5-260628",
  "content": [
    {
      "type": "text",
      "text": "One curved rachis with separated translucent blue pinnae and bright lime veins; every leaflet stays attached to that rachis. Never create a flower or compress the whole frond. Locked camera, unchanged lighting, black background, entire specimen inside frame. Keep the lower stem and base anchored. No orbit, zoom, cut, text, UI, watermarks, rain or drifting particles. Keep the reference material and fine veins temporally stable. This is a fictional botanical organ study, not a measured plant growth rate. Begin exactly at the supplied first frame and finish at the supplied last frame. 0–0.5s: hold the initial form. 0.5–4.5s: The crozier slowly uncoils. Lower pinnae separate before the tip; all connections remain continuous. 4.5–5s: settle at the target form. All change comes from the existing growth points, never a dissolve, replacement or disconnected new structure."
    },
    {
      "type": "image_url",
      "image_url": {
        "url": "https://xeed-living-companion.yomwu.chatgpt.site/assets/growth-hd/filix-1.png"
      },
      "role": "first_frame"
    },
    {
      "type": "image_url",
      "image_url": {
        "url": "https://xeed-living-companion.yomwu.chatgpt.site/assets/growth-hd/filix-2.png"
      },
      "role": "last_frame"
    }
  ],
  "ratio": "adaptive",
  "duration": 5,
  "resolution": "720p",
  "generate_audio": false,
  "output_format": "mp4"
}