diff --git a/app.py b/app.py
index af99e98..dd40853 100644
--- a/app.py
+++ b/app.py
@@ -1682,13 +1682,17 @@ async def hairline_grow_v2_final_v2(
 
 @app.get("/api/v1/debug/hairline_log", include_in_schema=False)
 async def download_hairline_log(rid: Optional[str] = None, tail: int = 500):
-    """返回 /home/xsl/hair/log/hairline_grow.log 的内容。
+    """返回 <仓库根>/log/hairline_grow.log 的内容。
 
     rid 非空时只返回该 request id 相关的行；tail 限制返回最后 N 行（默认 500）。
     供调试页"下载日志"按钮调用。
     """
     from fastapi.responses import PlainTextResponse
-    log_path = "/home/xsl/hair/log/hairline_grow.log"
+    log_path = os.getenv(
+        "HAIR_LOG_DIR",
+        os.path.join(os.path.dirname(os.path.abspath(__file__)), "log"),
+    )
+    log_path = os.path.join(log_path, "hairline_grow.log")
     try:
         with open(log_path, encoding="utf-8") as fh:
             lines = fh.readlines()
diff --git a/face_analysis/hairline_grow.py b/face_analysis/hairline_grow.py
index 4b39c29..5cfc5f1 100644
--- a/face_analysis/hairline_grow.py
+++ b/face_analysis/hairline_grow.py
@@ -47,8 +47,11 @@ from face_analysis.head_mask import (
     _draw_baseline,
 )
 
-# 调试日志：写 /home/xsl/hair/log/hairline_grow.log，每个步骤详细记录
-_LOG_DIR = "/home/xsl/hair/log"
+# 调试日志：写 <仓库根>/log/hairline_grow.log，每个步骤详细记录（可用 HAIR_LOG_DIR 覆盖）
+_LOG_DIR = os.getenv(
+    "HAIR_LOG_DIR",
+    os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), "log"),
+)
 os.makedirs(_LOG_DIR, exist_ok=True)
 logger = logging.getLogger("hairline_grow")
 _log_fh = logging.FileHandler(os.path.join(_LOG_DIR, "hairline_grow.log"), encoding="utf-8")