chore: modify style

Author: booxood

index.html

@@ -65,7 +65,7 @@
       }
       .demo-title span {
         display: inline-block;
-        padding-bottom: 4px;
+        padding-bottom: 10px;
         font-size: 20px;
         border-bottom: 1px dashed #6190E8;
         width: 120px;