Update Key Features
diff --git a/main/index.html b/main/index.html
index a322b33..487cc90 100755
--- a/main/index.html
+++ b/main/index.html
@@ -79,7 +79,7 @@
           <div class="col-12 text-center"><h2>Key Features</h2></div>

         </div>

         <div class="row py-4 justify-content-center m-1">

-          <div class="card shadow col-md-10 col-lg-5 m-3">

+          <div class="card shadow col-md-10 col-lg-5 col-xl-3 m-3">

             <div class="card-body">

               <div class="text-center text-primary">

                 <h2><i class="bi bi-shuffle"></i></h2>

@@ -88,25 +88,43 @@
               <div class="py-3">Primary-key table supports real-time streaming updates of large amounts of data. Real-time query within 1 minute.</div>

             </div>

           </div>

-          <div class="card shadow col-md-10 col-lg-5 m-3">

+          <div class="card shadow col-md-10 col-lg-5 col-xl-3 m-3">

             <div class="card-body">

               <div class="text-center text-primary">

                 <h2><i class="bi bi-calculator"></i></h2>

                 <h5>Flexible Updates</h5>

               </div>

-              <div class="py-3">Support defining Merge Engines, update records however you like. Deduplicate to keep last row, or partial-update, or aggregate records, or first-row, you decide.</div>

+              <div class="py-3">Defining Merge Engines, update records however you like. Deduplicate to keep last row, or partial-update, or aggregate records, or first-row, you decide.</div>

             </div>

           </div>

-          <div class="card shadow col-md-10 col-lg-5 m-3">

+          <div class="card shadow col-md-10 col-lg-5 col-xl-3 m-3">

             <div class="card-body">

               <div class="text-center text-primary">

                 <h2><i class="bi bi-clipboard2-pulse"></i></h2>

                 <h5>Change-tracking Updates</h5>

               </div>

-              <div class="py-3">Support defining changelog-producer, produce correct and complete changelog in updates for merge engines, simplifying your streaming analytics.</div>

+              <div class="py-3">Defining changelog-producer, produce correct and complete changelog in updates for merge engines, simplifying your streaming analytics.</div>

             </div>

           </div>

-          <div class="card shadow col-md-10 col-lg-5 m-3">

+          <div class="card shadow col-md-10 col-lg-5 col-xl-3 m-3">

+            <div class="card-body">

+              <div class="text-center text-primary">

+                <h2><i class="bi bi-table"></i></h2>

+                <h5>Append Data Processing</h5>

+              </div>

+              <div class="py-3">Append table (no primary-key) provides large scale batch and streaming processing capability. Supports compaction with z-order sorting.</div>

+            </div>

+          </div>

+          <div class="card shadow col-md-10 col-lg-5 col-xl-3 m-3">

+            <div class="card-body">

+              <div class="text-center text-primary">

+                <h2><i class="bi bi-calendar-event"></i></h2>

+                <h5>Query Data Skipping</h5>

+              </div>

+              <div class="py-3">Based on indexes such as minmax, filter irrelevant files and provide high-performance queries, more indexes are being supported.</div>

+            </div>

+          </div>

+          <div class="card shadow col-md-10 col-lg-5 col-xl-3 m-3">

             <div class="card-body">

               <div class="text-center text-primary">

                 <h2><i class="bi bi-clipboard2-pulse"></i></h2>

@@ -115,24 +133,6 @@
               <div class="py-3">Low cost, High reliability, Scalable metadata, Time Travel and Full Schema Evolution. All advantage as a data lake storage.</div>

             </div>

           </div>

-          <div class="card shadow col-md-10 col-lg-5 m-3">

-            <div class="card-body">

-              <div class="text-center text-primary">

-                <h2><i class="bi bi-table"></i></h2>

-                <h5>Huge Append Data Processing</h5>

-              </div>

-              <div class="py-3">Append table (no primary-key) provides large scale batch & streaming processing capability. Supports Data Compaction with z-order sorting to optimize file layout.</div>

-            </div>

-          </div>

-          <div class="card shadow col-md-10 col-lg-5 m-3">

-            <div class="card-body">

-              <div class="text-center text-primary">

-                <h2><i class="bi bi-calendar-event"></i></h2>

-                <h5>Data Skipping</h5>

-              </div>

-              <div class="py-3">Based on indexes such as minmax, filter irrelevant files and provide high-performance queries.</div>

-            </div>

-          </div>

         </div>

         <div class="row pb-3"></div>

       </div>