diff --git a/src/Makefile b/src/Makefile
index 5928e02..ad25461 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -19,9 +19,9 @@ define build
 	mkdir -p $(target_dir)/$(1)-$(2)
 	mkdir -p $(target_dir)/$(1)-$(2)/target
 	if [ "$(3)" = "light" ]; then \
-		scss --sourcemap=none --style expanded $(working_dir)/headers/$(1)/$(3).scss $(target_dir)/$(1)-$(2)/target/latex.css; \
+		sass --no-source-map --style expanded $(working_dir)/headers/$(1)/$(3).scss $(target_dir)/$(1)-$(2)/target/latex.css; \
 	else \
-		scss --sourcemap=none --style expanded $(working_dir)/headers/$(1)/$(3).scss $(target_dir)/$(1)-$(2)/target/latex-$(3).css; \
+		sass --no-source-map --style expanded $(working_dir)/headers/$(1)/$(3).scss $(target_dir)/$(1)-$(2)/target/latex-$(3).css; \
 	fi
 endef
 
diff --git a/src/scss/settings.scss b/src/scss/settings.scss
index d694ccb..42485e7 100644
--- a/src/scss/settings.scss
+++ b/src/scss/settings.scss
@@ -1,22 +1,27 @@
 :root {
+  $ui-font: null;
+  $heading-Chinese-font: null;
+  $chapter-Chinese-font: null;
+  $sub-chapter-Chinese-font: null;
+  $sub-sub-chapter-Chinese-font: null;
   @if $os == "windows" {
-    $ui-font: "\"阿里巴巴普惠体 2.0\"", "\"微软雅黑\"" !global;
-    $heading-Chinese-font: "华文黑体" !global;
-    $chapter-Chinese-font: "华文黑体" !global;
-    $sub-chapter-Chinese-font: "华文楷体" !global;
-    $sub-sub-chapter-Chinese-font: "华文仿宋" !global;
+    $ui-font: "\"阿里巴巴普惠体 2.0\"", "\"微软雅黑\"";
+    $heading-Chinese-font: "华文黑体";
+    $chapter-Chinese-font: "华文黑体";
+    $sub-chapter-Chinese-font: "华文楷体";
+    $sub-sub-chapter-Chinese-font: "华文仿宋";
   } @else if $os == "macos" {
-    $ui-font: "\"苹方-简\"" !global;
-    $heading-Chinese-font: "华文黑体Bold" !global;
-    $chapter-Chinese-font: "方正公文黑体" !global;
-    $sub-chapter-Chinese-font: "方正公文楷体" !global;
-    $sub-sub-chapter-Chinese-font: "方正公文仿宋" !global;
+    $ui-font: "\"苹方-简\"";
+    $heading-Chinese-font: "华文黑体Bold";
+    $chapter-Chinese-font: "方正公文黑体";
+    $sub-chapter-Chinese-font: "方正公文楷体";
+    $sub-sub-chapter-Chinese-font: "方正公文仿宋";
   } @else if $os == "linux" {
-    $ui-font: "\"Noto Sans CJK SC\"" !global;
-    $heading-Chinese-font: "Noto Sans CJK SC" !global;
-    $chapter-Chinese-font: "Noto Sans CJK SC" !global;
-    $sub-chapter-Chinese-font: "Noto Serif CJK SC" !global;
-    $sub-sub-chapter-Chinese-font: "Noto Serif CJK SC" !global;
+    $ui-font: "\"Noto Sans CJK SC\"";
+    $heading-Chinese-font: "Noto Sans CJK SC";
+    $chapter-Chinese-font: "Noto Sans CJK SC";
+    $sub-chapter-Chinese-font: "Noto Serif CJK SC";
+    $sub-sub-chapter-Chinese-font: "Noto Serif CJK SC";
   }
 
   /* == 字体设置 == */