Merge pull request #1012 from Jasonzhu1207/main

fix: WelcomePage

src/pages/WelcomePage.scss

@@ -201,6 +201,7 @@
       padding: 12px 16px;
       margin-left: -4px;
       margin-right: -4px;
+      overflow: hidden;
 
       // 遮挡流程线
       &::before {
@@ -212,7 +213,7 @@
         width: 20px;
         background: var(--primary);
         border-radius: 12px 0 0 12px;
-        z-index: -1;
+        z-index: 0;
       }
     }
 
@@ -234,6 +235,8 @@
   flex-shrink: 0;
   margin-top: 2px;
   transition: all 0.3s ease;
+  position: relative;
+  z-index: 1;
 
   [data-mode="dark"] .welcome-sidebar & {
     border-color: rgba(255, 255, 255, 0.2); // 稍微调亮边框
@@ -273,6 +276,8 @@
   display: flex;
   flex-direction: column;
   transition: transform 0.3s ease;
+  position: relative;
+  z-index: 1;
 }
 
 .nav-title {