diff --git a/.gitignore b/.gitignore
index a4cf52e..1b07b36 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
+models/
+hf_cache/
 server/server/
diff --git a/docs/models_downloading.py b/docs/models_downloading.py
index 8821831..f9c1867 100644
--- a/docs/models_downloading.py
+++ b/docs/models_downloading.py
@@ -1,69 +1,154 @@
 #!/usr/bin/env python3
 """
-离线模型下载器（Hugging Face Hub + SOCKS5 自动支持）
+models_downloading.py
+- 优先级：CN 镜像 (hf-mirror.com) -> 代理(PROXY) -> 官方直连
+- 统一缓存：HF_HOME=./hf_cache（可被环境变量覆盖）
+- 进度可见：启用 huggingface_hub 的 tqdm 进度
+- 幂等安全：本地目录已有关键文件则跳过下载
 
-默认参数：
-- MODEL_ID="BAAI/bge-m3"
-- MODEL_DIR="./models/bge-m3"
-- PROXY="socks5://127.0.0.1:1080"
-
-可用环境变量覆盖：
-- export MODEL_ID="你的模型ID"
-- export MODEL_DIR="/保存路径"
-- export PROXY="socks5h://ip:port"   # 为空表示直连
+可选环境变量：
+- MODEL_ID   默认 "BAAI/bge-m3"
+- MODEL_DIR  默认 "models/bge-m3"
+- HF_HOME    默认 "./hf_cache"
+- PROXY      默认 "socks5h://127.0.0.1:1081"（留空表示不走代理）
+- HF_ENDPOINT 手动指定镜像时可设置（脚本也会自动探测 cn mirror）
 """
 
 import os
 import sys
 from pathlib import Path
 
-# ==== 自动安装 SOCKS 依赖 ====
-try:
-    import socks  # PySocks
-except ImportError:
-    print("📦 Installing SOCKS proxy support (requests[socks])...")
-    os.system(f"{sys.executable} -m pip install -U 'requests[socks]'")
-    import socks
+# ---------- 配置 ----------
+MODEL_ID  = os.getenv("MODEL_ID", "BAAI/bge-m3")
+MODEL_DIR = Path(os.getenv("MODEL_DIR", "models/bge-m3"))
+HF_HOME   = Path(os.getenv("HF_HOME", Path.cwd() / "hf_cache"))
 
-# ==== 自动安装 huggingface_hub ====
+CN_MIRROR = "https://hf-mirror.com"
+PROXY     = os.getenv("PROXY", "socks5h://127.0.0.1:1081")
+
+# ---------- 提前设置缓存目录（在 import 前） ----------
+os.environ["HF_HOME"] = str(HF_HOME)
+
+# ---------- 依赖安装 ----------
+def _install(pkgs: str):
+    os.system(f"{sys.executable} -m pip install -U {pkgs}")
+
+try:
+    import requests
+except ImportError:
+    _install("requests")
+    import requests
+
+# 若走 socks 代理需要 PySocks
+if PROXY and "socks" in PROXY:
+    try:
+        import socks  # noqa: F401
+    except ImportError:
+        _install("'requests[socks]'")
+
+# ---------- 选择网络模式（镜像 → 代理 → 官方） ----------
+def set_network_mode():
+    # 若外部已设置 HF_ENDPOINT，尊重外部配置
+    if os.getenv("HF_ENDPOINT"):
+        print(f"🌏 Using custom HF endpoint: {os.getenv('HF_ENDPOINT')}")
+        return
+
+    # 1) 尝试 CN 镜像
+    try:
+        r = requests.get(CN_MIRROR, timeout=2)
+        if r.status_code == 200:
+            os.environ["HF_ENDPOINT"] = CN_MIRROR
+            print(f"🌏 Using Hugging Face CN mirror: {CN_MIRROR}")
+            return
+    except Exception:
+        pass
+
+    # 2) 走代理
+    if PROXY:
+        os.environ["HTTP_PROXY"]  = PROXY
+        os.environ["HTTPS_PROXY"] = PROXY
+        print(f"🌐 Using proxy: {PROXY}")
+        return
+
+    # 3) 官方直连
+    print("⚠️  No mirror or proxy, using official huggingface.co")
+
+set_network_mode()
+
+# 现在再导入 huggingface_hub，确保拿到正确的 endpoint/proxy 设置
 try:
     from huggingface_hub import snapshot_download
 except ImportError:
-    print("📦 Installing huggingface_hub...")
-    os.system(f"{sys.executable} -m pip install -U huggingface_hub")
+    _install("'huggingface_hub[tqdm]'")
     from huggingface_hub import snapshot_download
 
-# ==== 默认配置 ====
-DEFAULT_MODEL_ID = "BAAI/bge-m3"
-DEFAULT_MODEL_DIR = "models/bge-m3"
-DEFAULT_PROXY = "socks5://127.0.0.1:1080"
-
-# ==== 从环境变量读取 ====
-MODEL_ID = os.environ.get("MODEL_ID", DEFAULT_MODEL_ID)
-MODEL_DIR = Path(os.environ.get("MODEL_DIR", DEFAULT_MODEL_DIR))
-PROXY = os.environ.get("PROXY", DEFAULT_PROXY)
-
-# ==== 设置代理 ====
-if PROXY:
-    os.environ["HTTP_PROXY"] = PROXY
-    os.environ["HTTPS_PROXY"] = PROXY
-    print(f"🌐 Using proxy: {PROXY}")
-else:
-    print("🚫 No proxy configured, direct connection.")
-
-# ==== 创建保存目录 ====
-MODEL_DIR.parent.mkdir(parents=True, exist_ok=True)
-
-# ==== 下载模型 ====
-print(f"⬇️  Downloading model from Hugging Face...")
-print(f"   Model ID: {MODEL_ID}")
-print(f"   Save dir: {MODEL_DIR}")
-
-snapshot_download(
-    repo_id=MODEL_ID,
-    local_dir=str(MODEL_DIR),
-    local_dir_use_symlinks=False
+# ---------- 工具函数 ----------
+KEY_FILES = (
+    "tokenizer.json",
+    "config.json",
+    "sentencepiece.bpe.model",
+    "onnx/model.onnx",
+    "pytorch_model.bin",
+    "model.safetensors",
 )
 
-print(f"✅ Model cached to {MODEL_DIR}")
+def has_local_model(root: Path) -> bool:
+    if not root.exists():
+        return False
+    for k in KEY_FILES:
+        if any(root.rglob(k)):
+            return True
+    # 兜底：只要非空也算有内容（对应部分仓库布局）
+    return any(root.iterdir())
 
+# ---------- 主流程 ----------
+def main():
+    print("⬇️  Downloading model from Hugging Face…")
+    print(f"   Model ID : {MODEL_ID}")
+    print(f"   Save dir : {MODEL_DIR}")
+    print(f"   HF_HOME  : {HF_HOME}")
+    if os.getenv("HF_ENDPOINT"):
+        print(f"   Endpoint : {os.getenv('HF_ENDPOINT')}")
+    elif os.getenv("HTTP_PROXY"):
+        print(f"   Proxy    : {os.getenv('HTTP_PROXY')}")
+    else:
+        print("   Endpoint : official (huggingface.co)")
+
+    MODEL_DIR.parent.mkdir(parents=True, exist_ok=True)
+    HF_HOME.mkdir(parents=True, exist_ok=True)
+
+    # 已有可用文件 → 跳过下载
+    if has_local_model(MODEL_DIR):
+        print(f"📂 Local model exists, skip download: {MODEL_DIR}")
+        print("💡 To force re-download, remove the folder and rerun.")
+        return
+
+    # 下载（显示进度）
+    try:
+        snapshot_download(
+            repo_id=MODEL_ID,
+            local_dir=str(MODEL_DIR),
+            local_dir_use_symlinks=False,
+            tqdm_class=None,   # 使用默认 tqdm 进度条
+        )
+    except Exception as e:
+        # 失败时检查是否已经有部分或全部文件
+        if has_local_model(MODEL_DIR):
+            print(f"⚠️  Online fetch failed but local files exist: {MODEL_DIR}")
+            print(f"   Error: {e}")
+        else:
+            print("❌ Download failed and no local files found.")
+            print(f"   Error: {e}")
+            print("🔁 Try: 1) 切换镜像/代理  2) 检查网络  3) 稍后重试")
+            sys.exit(1)
+
+    # 最终确认
+    if has_local_model(MODEL_DIR):
+        print(f"✅ Model cached to {MODEL_DIR}")
+        print("💡 To run offline later, set: export HF_HUB_OFFLINE=1")
+    else:
+        print("❌ No model files found after download attempt.")
+        sys.exit(1)
+
+if __name__ == "__main__":
+    main()
\ No newline at end of file
diff --git a/docs/offline_embed_server.py b/docs/offline_embed_server.py
index 711c5c3..be4b00b 100644
--- a/docs/offline_embed_server.py
+++ b/docs/offline_embed_server.py
@@ -2,44 +2,134 @@
 import os, sys, numpy as np
 from pathlib import Path
 
-# 自动装依赖
+# ==== 自动安装依赖 ====
+def install(pkg):
+    os.system(f"{sys.executable} -m pip install -U {pkg}")
+
 try:
     from flask import Flask, request, jsonify
     from fastembed import TextEmbedding
     from huggingface_hub import snapshot_download
 except ImportError:
-    os.system(f"{sys.executable} -m pip install -U flask fastembed numpy huggingface_hub")
+    install("flask fastembed numpy huggingface_hub")
     from flask import Flask, request, jsonify
     from fastembed import TextEmbedding
     from huggingface_hub import snapshot_download
 
-# 模型路径
-MODEL_DIR = Path(os.getenv("BGE_M3_DIR", "models/bge-m3"))
+# ==== 配置 ====
+MODEL_ID  = os.getenv("MODEL_ID", "BAAI/bge-m3")
+MODEL_DIR = Path(os.getenv("MODEL_DIR", "models/bge-m3"))
+HF_HOME   = Path(os.getenv("HF_HOME", Path.cwd() / "hf_cache"))
 
-# 如果本地无模型，先下载
-if not MODEL_DIR.exists():
-    print(f"⬇️ Downloading BGE-M3 to {MODEL_DIR} ...")
-    snapshot_download("BAAI/bge-m3", local_dir=str(MODEL_DIR), local_dir_use_symlinks=False)
+# 设置 HF 缓存目录
+os.environ["HF_HOME"] = str(HF_HOME)
 
-# 离线模式
-os.environ["HF_HOME"] = str(Path.cwd() / "hf_cache")
+# ==== 确保模型已存在（不在这里判断支持性） ====
+if not MODEL_DIR.exists() or not any(MODEL_DIR.iterdir()):
+    print(f"⬇️ Downloading model {MODEL_ID} to {MODEL_DIR} ...")
+    snapshot_download(repo_id=MODEL_ID, local_dir=str(MODEL_DIR), local_dir_use_symlinks=False)
+
+# ==== 离线模式 ====
 os.environ["HF_HUB_OFFLINE"] = "1"
 
-# 启动服务
+# ==== 启动 Flask 服务 ====
 app = Flask(__name__)
-model = TextEmbedding(str(MODEL_DIR))
+
+# 这里用模型 ID 初始化，而不是路径
+model = TextEmbedding(MODEL_ID)
+DIM = 1024  # bge-m3 的维度
 
 @app.post("/v1/embeddings")
 def embeddings():
     data = request.get_json(force=True) or {}
     texts = [data["input"]] if isinstance(data.get("input"), str) else data.get("input", [])
     vecs = [np.asarray(v, np.float32) / (np.linalg.norm(v) + 1e-12) for v in model.embed(texts)]
-    return jsonify({"object": "list", "data": [
-        {"object": "embedding", "index": i, "embedding": v.tolist()} for i, v in enumerate(vecs)
-    ], "model": data.get("model", "BAAI/bge-m3")})
+    return jsonify({
+        "object": "list",
+        "data": [
+            {"object": "embedding", "index": i, "embedding": v.tolist()}
+            for i, v in enumerate(vecs)
+        ],
+        "model": data.get("model", MODEL_ID)
+    })
 
 @app.get("/healthz")
-def healthz(): return "ok", 200
+def healthz():
+    return "ok", 200
 
 if __name__ == "__main__":
-    app.run(host=os.getenv("EMBED_HOST", "0.0.0.0"), port=int(os.getenv("EMBED_PORT", 9000)))
+    host = os.getenv("EMBED_HOST", "0.0.0.0")
+    port = int(os.getenv("EMBED_PORT", 9000))
+    print(f"🚀 Starting embedding server on http://{host}:{port}")
+    print(f"   Model: {MODEL_ID}")
+    print(f"   Cache dir: {HF_HOME}")
+    app.run(host=host, port=port)
+shenlan@MacBook-Pro-3 XControl % clear
+shenlan@MacBook-Pro-3 XControl %
+shenlan@MacBook-Pro-3 XControl % cat docs/offline_embed_server.py
+#!/usr/bin/env python3
+import os, sys, numpy as np
+from pathlib import Path
+
+# ==== 自动安装依赖 ====
+def install(pkg):
+    os.system(f"{sys.executable} -m pip install -U {pkg}")
+
+try:
+    from flask import Flask, request, jsonify
+    from fastembed import TextEmbedding
+    from huggingface_hub import snapshot_download
+except ImportError:
+    install("flask fastembed numpy huggingface_hub")
+    from flask import Flask, request, jsonify
+    from fastembed import TextEmbedding
+    from huggingface_hub import snapshot_download
+
+# ==== 配置 ====
+MODEL_ID  = os.getenv("MODEL_ID", "BAAI/bge-m3")
+MODEL_DIR = Path(os.getenv("MODEL_DIR", "models/bge-m3"))
+HF_HOME   = Path(os.getenv("HF_HOME", Path.cwd() / "hf_cache"))
+
+# 设置 HF 缓存目录
+os.environ["HF_HOME"] = str(HF_HOME)
+
+# ==== 确保模型已存在（不在这里判断支持性） ====
+if not MODEL_DIR.exists() or not any(MODEL_DIR.iterdir()):
+    print(f"⬇️ Downloading model {MODEL_ID} to {MODEL_DIR} ...")
+    snapshot_download(repo_id=MODEL_ID, local_dir=str(MODEL_DIR), local_dir_use_symlinks=False)
+
+# ==== 离线模式 ====
+os.environ["HF_HUB_OFFLINE"] = "1"
+
+# ==== 启动 Flask 服务 ====
+app = Flask(__name__)
+
+# 这里用模型 ID 初始化，而不是路径
+model = TextEmbedding(MODEL_ID)
+DIM = 1024  # bge-m3 的维度
+
+@app.post("/v1/embeddings")
+def embeddings():
+    data = request.get_json(force=True) or {}
+    texts = [data["input"]] if isinstance(data.get("input"), str) else data.get("input", [])
+    vecs = [np.asarray(v, np.float32) / (np.linalg.norm(v) + 1e-12) for v in model.embed(texts)]
+    return jsonify({
+        "object": "list",
+        "data": [
+            {"object": "embedding", "index": i, "embedding": v.tolist()}
+            for i, v in enumerate(vecs)
+        ],
+        "model": data.get("model", MODEL_ID)
+    })
+
+@app.get("/healthz")
+def healthz():
+    return "ok", 200
+
+if __name__ == "__main__":
+    host = os.getenv("EMBED_HOST", "0.0.0.0")
+    port = int(os.getenv("EMBED_PORT", 9000))
+    print(f"🚀 Starting embedding server on http://{host}:{port}")
+    print(f"   Model: {MODEL_ID}")
+    print(f"   Cache dir: {HF_HOME}")
+    app.run(host=host, port=port)
\ No newline at end of file