diff --git a/public/static/index/pc/css/orico_header.css b/public/static/index/pc/css/orico_header.css
index 96c3685d..f1fa2012 100755
--- a/public/static/index/pc/css/orico_header.css
+++ b/public/static/index/pc/css/orico_header.css
@@ -3,11 +3,13 @@
   width: 100%;
 }
 .header-PC #header {
-  margin: 0 auto;
+  /* margin: 0 auto; */
   height: 3.75rem;
-  width: 1920px;
+  max-width: var(--max-width); /* 与 body 同步 */
   position: fixed;
   top: 0;
+  left: 50%; /* 先定位到视口中间 */
+  transform: translateX(-50%); /* 再向左回退自身宽度的一半 */
   display: flex;
   flex-direction: row;
   align-items: center;
diff --git a/public/static/index/pc/css/public.css b/public/static/index/pc/css/public.css
index 9fc91b49..98b79706 100755
--- a/public/static/index/pc/css/public.css
+++ b/public/static/index/pc/css/public.css
@@ -43,8 +43,9 @@ body {
 	font-size: 1.2em;
 	font-weight: 400;
 	color: #333;
-	max-width: 1920px !important;
-	margin:0 auto;
+	--max-width: 1920px;
+    max-width: var(--max-width);
+    margin: 0 auto;
 }
 
 select,