完善页面8

pages/mall/admin/user/level/index.uvue

@@ -235,26 +235,24 @@ const handleSave = () => {
 
 <style scoped lang="scss">
 .admin-user-level {
-  background-color: #f0f2f5;
+  /* 使用 Layout 的背景和内边距 */
   min-height: 100vh;
-  padding: 24px;
 }
 
 .border-shadow {
   background-color: #fff;
   border-radius: 4px;
-  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.05);
 }
 
 .content-body {
   display: flex;
   flex-direction: column;
-  gap: 20px;
+  gap: var(--admin-section-gap);
 }
 
 /* 过滤栏 */
 .filter-card {
-  padding: 24px;
+  padding: var(--admin-card-padding);
   display: flex;
   flex-direction: row;
   align-items: center;