diff --git a/.editorconfig b/.editorconfig
index 1cf3ef1..b4cbf37 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -1,4 +1,4 @@
-root=true
+root = true
 
 [*.tex, *.md]
 
@@ -7,3 +7,6 @@ end_of_line = lf
 
 insert_final_newline = true
 trim_trailing_whitespace = true
+
+indent_style = space
+indent_size = 4
diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..606b371
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,2 @@
+*.tex   text eol=lf
+*.md    text eol=lf
diff --git a/.gitignore b/.gitignore
index 4447157..bf4ef7f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,11 +1,14 @@
-.vscode
-
 ## Generated PDF files are ignored.
 ## Navigate to GitHub Actions or Releases to obtain a copy.
 讲义/*.pdf
 习题参考答案/*.pdf
 build
 
+## VSCode workspace settings
+.vscode/settings.json
+.vscode/launch.json
+.vscode/tasks.json
+
 ## Core latex/pdflatex auxiliary files:
 *.aux
 *.lof
diff --git a/.vscode/extensions.json b/.vscode/extensions.json
new file mode 100644
index 0000000..4aaf7b6
--- /dev/null
+++ b/.vscode/extensions.json
@@ -0,0 +1,3 @@
+{
+    "recommendations": [ "editorconfig.editorconfig" ]
+}