style: update border-radius and padding values across components

- standardize border-radius from 8px to 6px for consistent styling
- adjust padding values from 1rem to 0.75rem for better visual hierarchy
- remove redundant overflow-y properties for cleaner code

docs/.vitepress/theme/components/appendix/frontend-routing/RouteMatchingDemo.vue

@@ -173,12 +173,12 @@ testMatch()
 <style scoped>
 .route-matching-demo {
   border: 1px solid var(--vp-c-divider);
-  border-radius: 8px;
+  border-radius: 6px;
   background: var(--vp-c-bg-soft);
-  padding: 1rem;
-  margin: 1rem 0;
-  max-height: 600px;
-  overflow-y: auto;
+  padding: 0.75rem;
+  margin: 0.5rem 0;
+  
+  
 }
 
 .demo-header {
@@ -216,7 +216,7 @@ testMatch()
 
 .input-section, .result-section {
   background: var(--vp-c-bg);
-  border-radius: 8px;
+  border-radius: 6px;
   padding: 0.75rem;
   border: 1px solid var(--vp-c-divider);
 }
@@ -318,7 +318,7 @@ h5 {
 
 .match-fail {
   text-align: center;
-  padding: 1rem;
+  padding: 0.75rem;
   color: var(--vp-c-text-3);
 }
 
@@ -329,7 +329,7 @@ h5 {
 
 .routes-list {
   background: var(--vp-c-bg);
-  border-radius: 8px;
+  border-radius: 6px;
   padding: 0.75rem;
   border: 1px solid var(--vp-c-divider);
   margin-bottom: 1rem;