diff --git a/app/src/main/java/org/yameida/worktool/utils/WeworkTextUtil.kt b/app/src/main/java/org/yameida/worktool/utils/WeworkTextUtil.kt
index 815abd0..6837139 100644
--- a/app/src/main/java/org/yameida/worktool/utils/WeworkTextUtil.kt
+++ b/app/src/main/java/org/yameida/worktool/utils/WeworkTextUtil.kt
@@ -329,7 +329,12 @@ object WeworkTextUtil {
      * 是否为文件上方时间
      */
     fun isFileSize(size: String?): Boolean {
-        return size?.matches("[0-9\\.]+[BKMG]".toRegex()) ?: false
+        if (size.isNullOrBlank()) return false
+        // 兼容常见文件大小格式: 12M / 12MB / 12.5 MB / 12 kb
+        val normalized = size.trim()
+        return normalized.matches(
+            "^[0-9]+(?:\\.[0-9]+)?[\\s\\u00A0]?(?:B|KB|MB|GB|TB|K|M|G)$".toRegex(RegexOption.IGNORE_CASE)
+        )
     }
 
     /**
@@ -555,4 +560,4 @@ object WeworkTextUtil {
         }
         return null
     }
-}
\ No newline at end of file
+}