diff --git a/themes/next/source/css/_common/components/post/post-expand.styl b/themes/next/source/css/_common/components/post/post-expand.styl
index 8836c0ea..8c6d8a5b 100644
--- a/themes/next/source/css/_common/components/post/post-expand.styl
+++ b/themes/next/source/css/_common/components/post/post-expand.styl
@@ -4,7 +4,7 @@
   padding-top: 40px;
 }
 
-@media (max-width: 600px) {
+@media (max-width: 767px) {
   .posts-expand {
     margin: 0 20px;
   }
diff --git a/themes/next/source/css/_variables/custom.styl b/themes/next/source/css/_variables/custom.styl
index e69de29b..37a0b55e 100644
--- a/themes/next/source/css/_variables/custom.styl
+++ b/themes/next/source/css/_variables/custom.styl
@@ -0,0 +1,5 @@
+// 修改成你期望的宽度
+$content-desktop = 700px
+
+// 当视窗超过 1600px 后的宽度
+$content-desktop-large = 900px