创建视频生成任务

https://api.gravitex.ai/api/v3/contents/generations/tasks

curl -X POST https://api.gravitex.ai/api/v3/contents/generations/tasks \
  -H "Authorization: Bearer sk-your_token_key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedance-2-0",
    "content": [
      {"type": "text", "text": "黄金时刻，无人机航拍连绵山脉"}
    ],
    "duration": 5,
    "resolution": "720p",
    "ratio": "16:9",
    "generate_audio": true
  }'

{
  "id": "cgt-20260708094649-mxfjc"
}