diff --git a/train_sft_ds.py b/train_sft_ds.py
index 1d7d1ee..b4dca77 100644
--- a/train_sft_ds.py
+++ b/train_sft_ds.py
@@ -179,56 +179,6 @@ class CsvLossLogger(TrainerCallback):
 
 from typing import List, Tuple, Iterable, Iterator, Dict
 
-# ----------------- 工具：提取 assistant 字符区间 -----------------
-# def _assistant_char_spans(rendered: str) -> List[Tuple[int, int]]:
-#     spans: List[Tuple[int, int]] = []
-#     open_tag = "<|im_start|>assistant\n"
-#     close_token = "<|im_end|>"
-#     close_tag = close_token + "\n"  # 常见模板带换行
-
-#     pos = 0
-#     while True:
-#         a = rendered.find(open_tag, pos)
-#         if a == -1:
-#             break
-#         start = a + len(open_tag)
-
-#         # 先找含换行版本，找不到再退化找不带换行的
-#         b = rendered.find(close_tag, start)
-#         if b == -1:
-#             b = rendered.find(close_token, start)
-#             if b == -1:
-#                 break
-
-#         end = b + len(close_token)   # 把 <|im_end|> 本体纳入监督
-#         spans.append((start, end))
-
-#         # pos 跳过这一轮结束标记（带换行就多跳一格）
-#         pos = b + (len(close_tag) if rendered.startswith(close_tag, b) else len(close_token))
-#     return spans
-
-# def _think_char_spans(rendered: str) -> List[Tuple[int, int]]:
-#     """
-#     返回需要忽略监督的区间（仅 <think>...</think> 的“内部”），
-#     标签本身 <think> 与 </think> 仍参与监督，以便模型学会闭合。
-#     """
-#     spans: List[Tuple[int, int]] = []
-#     open_tag = "<think>"
-#     close_tag = "</think>"
-#     pos = 0
-#     while True:
-#         a = rendered.find(open_tag, pos)
-#         if a == -1:
-#             break
-#         b = rendered.find(close_tag, a + len(open_tag))
-#         if b == -1:
-#             break
-#         # 只忽略内部，不忽略两侧标签
-#         spans.append((a + len(open_tag), b))
-#         pos = b + len(close_tag)
-#     return spans
-
-
 # ----------------- 仅监督 assistant 内容（token-id 级，不用 offsets） -----------------
 class QwenChatSFTDataset(IterableDataset):
     """
@@ -510,12 +460,85 @@ def main():
     set_seed(args.seed)
 
     host = socket.gethostname()
-    def dbg(msg):
-        print(
-            f"[dbg][host={host} RANK={os.environ.get('RANK','0')} "
-            f"LOCAL_RANK={os.environ.get('LOCAL_RANK', str(args.local_rank))}] {msg}",
-            flush=True
-        )
+
+
+    # ==== colored dbg (robust default to info) ====
+    try:
+        import colorama
+        colorama.just_fix_windows_console()
+    except Exception:
+        pass
+
+    def _use_color() -> bool:
+        if os.environ.get("NO_COLOR"): return False
+        if os.environ.get("FORCE_COLOR"): return True
+        return sys.stdout.isatty()
+
+    class _C:
+        reset  = "\033[0m"
+        gray   = "\033[90m"
+        green  = "\033[32m"
+        yellow = "\033[33m"
+        red    = "\033[31m"
+        cyan   = "\033[36m"
+
+    def _paint(s, color):
+        return f"{color}{s}{_C.reset}" if _use_color() else s
+
+    _LEVEL_ALIAS = {
+        "": "info", None: "info",
+        "ok": "ok", "success": "ok", "pass": "ok",
+        "warn": "warn", "warning": "warn",
+        "err": "err", "error": "err", "fatal": "err", "fail": "err",
+        "info": "info", "information": "info"
+    }
+
+    _LEVEL_COLOR = {
+        "ok":   _C.green,
+        "warn": _C.yellow,
+        "err":  _C.red,
+        "info": _C.cyan,
+    }
+
+    def _norm_level(level) -> str:
+        # 默认 info
+        if level is None:
+            return "info"
+        # 数字等级兼容（类似 logging）
+        if isinstance(level, (int, float)):
+            if level >= 40: return "err"
+            if level >= 30: return "warn"
+            return "info"
+        # 字符串别名
+        if isinstance(level, str):
+            key = level.strip().lower()
+            return _LEVEL_ALIAS.get(key, "info")
+        return "info"
+
+    def dbg(msg, level=None):
+        lvl = _norm_level(level)  # 未指定/非法 -> "info"
+        host = socket.gethostname()
+        rank = os.environ.get("RANK", "0")
+        lrank = os.environ.get("LOCAL_RANK", "-1")
+        prefix = f"[dbg][host={host} RANK={rank} LOCAL_RANK={lrank}] "
+        color = _LEVEL_COLOR.get(lvl, _C.cyan)
+        print(_paint(prefix, _C.gray) + _paint(str(msg), color), flush=True)
+
+    # 便捷别名（可选）
+    def dbg_ok(m):   dbg(m, "ok")
+    def dbg_warn(m): dbg(m, "warn")
+    def dbg_err(m): 
+        s = _paint(f"[dbg]{m}", _C.red)
+        print(s, flush=True, file=sys.stderr)
+
+
+
+    # def dbg(msg):
+    #     print(
+    #         f"[dbg][host={host} RANK={os.environ.get('RANK','0')} "
+    #         f"LOCAL_RANK={os.environ.get('LOCAL_RANK', str(args.local_rank))}] {msg}",
+    #         flush=True
+    #     )
 
     # 是否真的启用 DeepSpeed（传了配置文件且文件存在）
     use_ds = bool(args.deepspeed and os.path.isfile(args.deepspeed))
@@ -682,9 +705,9 @@ def main():
     )
 
     print(f"GC enabled? {getattr(model, 'is_gradient_checkpointing', False)}", flush=True)
-    dbg(f"model loaded: dtype={next(model.parameters()).dtype} "
-        f"use_cache={getattr(model.config,'use_cache',None)} "
-        f"pad_token_id={getattr(model.config,'pad_token_id',None)}")
+    # dbg(f"model loaded: dtype={next(model.parameters()).dtype} "
+    #     f"use_cache={getattr(model.config,'use_cache',None)} "
+    #     f"pad_token_id={getattr(model.config,'pad_token_id',None)}")
 
     # 3) pad/alibi 等配置
     model.config.pad_token_id = tokenizer.pad_token_id
@@ -703,6 +726,16 @@ def main():
         except Exception:
             pass
 
+    # ✅ 放在这里打印“修正后”的值
+    dbg(f"post-config: use_cache={model.config.use_cache} "
+        f"model.pad_token_id={model.config.pad_token_id} "
+        f"gen.pad_token_id={getattr(getattr(model,'generation_config',None),'pad_token_id',None)} "
+        f"tok.pad={tokenizer.pad_token}/{tokenizer.pad_token_id}")
+
+    assert tokenizer.pad_token_id is not None, "tokenizer.pad_token_id must not be None"
+    assert model.config.pad_token_id == tokenizer.pad_token_id, \
+        f"model.pad_token_id {model.config.pad_token_id} != tokenizer.pad_token_id {tokenizer.pad_token_id}"
+
     # ===== 数据鲁棒性检查（多机各自执行）=====
     files = sorted(glob.glob(args.data_glob))
     if len(files) == 0: