diff --git a/tools/screencast/composer.py b/tools/screencast/composer.py
index cea3c45..4ea95b9 100644
--- a/tools/screencast/composer.py
+++ b/tools/screencast/composer.py
@@ -7,6 +7,17 @@ import sys
 from pathlib import Path
 
 
+# 匠厂统一字幕样式 —— 所有 skill 录屏共用，做品牌一致性
+# FontSize 14：1080p 屏幕约占 1.3% 高度，演示视频留足画面呼吸感
+# Outline 2：14 号字配 Outline 3 会显胖，2 已足够在浅色背景上保持可读
+# 修改请评估对所有 skill 录屏的影响。
+_JIANGCHANG_SUBTITLE_STYLE = (
+    "FontName=Arial,FontSize=14,"
+    "PrimaryColour=&H00FFFFFF,OutlineColour=&H00000000,"
+    "Outline=2,Shadow=1,Alignment=2"
+)
+
+
 def compose_video(
     frames_dir: str,
     fps: int,
@@ -32,9 +43,7 @@ def compose_video(
 
     subtitle_filter = (
         f"subtitles='{srt_path_str}'"
-        ":force_style='FontName=Arial,FontSize=28,"
-        "PrimaryColour=&H00FFFFFF,OutlineColour=&H00000000,"
-        "Outline=2,Shadow=1,Alignment=2'"
+        f":force_style='{_JIANGCHANG_SUBTITLE_STYLE}'"
     )
 
     # 视频和音频都放进 filter_complex，避免 -vf 与 -filter_complex 混用报错
diff --git a/tools/screencast/runner.py b/tools/screencast/runner.py
index 477781c..13ef29f 100644
--- a/tools/screencast/runner.py
+++ b/tools/screencast/runner.py
@@ -66,6 +66,13 @@ def run_screencast(
         engine.set_start_time(time.time())
 
         try:
+            # Windows 子进程 stdout 默认走系统 ANSI code page（中文 Windows 是 cp936/GBK），
+            # 这边用 encoding="utf-8" 解码会乱码。注入 PYTHONIOENCODING + PYTHONUTF8 让
+            # 子进程 Python 强制以 UTF-8 输出，两端编码对齐。非 Windows 默认就 UTF-8，无副作用。
+            env = os.environ.copy()
+            env["PYTHONIOENCODING"] = "utf-8"
+            env["PYTHONUTF8"] = "1"
+
             proc = subprocess.Popen(
                 [sys.executable, "-m", "pytest", *pytest_args],
                 stdout=subprocess.PIPE,
@@ -73,6 +80,7 @@ def run_screencast(
                 text=True,
                 encoding="utf-8",
                 errors="replace",
+                env=env,
             )
             assert proc.stdout is not None
             for line in proc.stdout:
diff --git a/tools/screencast/subtitle.py b/tools/screencast/subtitle.py
index 122eb6c..a8b7ae8 100644
--- a/tools/screencast/subtitle.py
+++ b/tools/screencast/subtitle.py
@@ -40,6 +40,15 @@ class SubtitleEngine:
                 self._matched.add(keyword)
 
     def generate_srt(self, output_path: str) -> None:
+        """生成 SRT 文件，自动处理字幕重叠。
+
+        字幕重叠修复策略（避免屏幕上同时显示 2+ 条叠成两行）：
+        - 字幕按 start 时间升序排序后；
+        - 相邻字幕保留 GAP=0.1s 间隔；
+        - 每条字幕保证至少 MIN_DURATION=1.0s 显示时间（短到这个值仍读不完是字幕脚本设计问题）；
+        - 若当前条让位给下一条后剩余时间 < MIN_DURATION，则把下一条 start 往后推。
+        这样任意时刻屏幕上最多 1 条字幕。
+        """
         def _fmt(s: float) -> str:
             h = int(s // 3600)
             m = int((s % 3600) // 60)
@@ -47,9 +56,26 @@ class SubtitleEngine:
             ms = int((s % 1) * 1000)
             return f"{h:02d}:{m:02d}:{sec:02d},{ms:03d}"
 
+        # 防重叠 post-process
+        MIN_DURATION = 1.0
+        GAP = 0.1
+        entries = sorted(self._entries, key=lambda e: e.start)
+        for i in range(len(entries) - 1):
+            cur, nxt = entries[i], entries[i + 1]
+            max_end = nxt.start - GAP
+            new_dur = max_end - cur.start
+            if new_dur < MIN_DURATION:
+                # 太挤：cur 至少撑 MIN_DURATION 秒，把 nxt 推迟
+                cur.duration = MIN_DURATION
+                nxt.start = cur.start + MIN_DURATION + GAP
+            else:
+                # 正常让位：cur 显示到 (nxt.start - GAP)
+                cur.duration = min(cur.duration, new_dur)
+        # 最后一条不需要让位，保持原 duration
+
         Path(output_path).parent.mkdir(parents=True, exist_ok=True)
         with open(output_path, "w", encoding="utf-8") as f:
-            for i, e in enumerate(self._entries, 1):
+            for i, e in enumerate(entries, 1):
                 f.write(f"{i}\n")
                 f.write(f"{_fmt(e.start)} --> {_fmt(e.start + e.duration)}\n")
                 f.write(f"{e.text}\n\n")