diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 00000000..3558463f
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,49 @@
+# 统一文本文件行尾为 LF，避免 Windows 编辑器把 LF 变 CRLF 污染 diff / git blame
+*              text=auto eol=lf
+
+# 源码类：显式标记，拒绝 autocrlf
+*.java         text eol=lf
+*.kt           text eol=lf
+*.groovy       text eol=lf
+*.xml          text eol=lf
+*.yaml         text eol=lf
+*.yml          text eol=lf
+*.json         text eol=lf
+*.properties   text eol=lf
+*.md           text eol=lf
+*.sql          text eol=lf
+*.sh           text eol=lf
+*.py           text eol=lf
+*.ts           text eol=lf
+*.tsx          text eol=lf
+*.js           text eol=lf
+*.vue          text eol=lf
+*.html         text eol=lf
+*.css          text eol=lf
+*.scss         text eol=lf
+Jenkinsfile    text eol=lf
+Dockerfile     text eol=lf
+
+# Windows 专用脚本保持 CRLF
+*.bat          text eol=crlf
+*.cmd          text eol=crlf
+*.ps1          text eol=crlf
+
+# 二进制类：禁止任何转换
+*.jar          binary
+*.class        binary
+*.png          binary
+*.jpg          binary
+*.jpeg         binary
+*.gif          binary
+*.ico          binary
+*.pdf          binary
+*.zip          binary
+*.gz           binary
+*.so           binary
+*.dll          binary
+*.exe          binary
+*.woff         binary
+*.woff2        binary
+*.ttf          binary
+*.eot          binary