tree:
  max_paragraphs_per_l2: 5
  l1_segment_duration: 600.0
  l2_clip_duration: 60.0
  l3_fps: 1.0
  l2_representative_frames: 10
  cache_dir: "cache/trees"
  concurrency: 16

embed:
  backend: "local"                    # "local" (sentence-transformers) | "remote" (OpenAI 兼容 API)
  model_name: "BAAI/bge-base-zh-v1.5"
  embed_dim: 2560
  device: "cuda"
  api_key: ""                         # 远程模式从 .env 覆盖
  api_url: ""                         # 远程模式从 .env 覆盖

llm:
  backend: "qwen"
  model: "qwen-plus"
  api_url: "https://dashscope.aliyuncs.com/compatible-mode/v1/chat/completions"
  max_tokens: 256
  temperature: 0.1
  # api_key: 从 .env 加载，此处不写

vlm:
  backend: "qwen"
  model: "qwen-vl-plus"
  api_url: "https://dashscope.aliyuncs.com/compatible-mode/v1/chat/completions"
  max_tokens: 256
  temperature: 0.1
  # api_key: 从 .env 加载，此处不写

retriever:
  embed_dim: 2560
  num_heads: 4
  L_layers: 2
  L_cycles: 4
  max_rounds: 5
  ffn_expansion: 2.0
  checkpoint: null

train:
  lr: 1.0e-4
  weight_decay: 1.0e-5
  batch_size: 1
  max_epochs_phase1: 30
  max_epochs_phase2: 20
  nav_loss_weight: 1.0
  act_loss_weight: 0.1
  margin_loss_weight: 0.5
  act_lambda_step: 0.1
  act_gamma: 0.9
  eval_interval: 5
  save_dir: "checkpoints"
  dataset: "longbench"
  dataset_path: "data/longbench"