缺少箭头，需要补上

index.html

@@ -122,6 +122,13 @@
                     <p>传统智慧 · 临床经验 · 师徒传承</p>
                 </div>
             </div>
+            
+            <!-- Arrow 1 -->
+            <div class="arrow flex-1 mx-8">
+                <div class="text-center">
+                    <i data-feather="arrow-right" class="w-8 h-8 mx-auto" style="color: #64748b;"></i>
+                </div>
+            </div>
 <!-- Stage 2: Evidence Medicine -->
             <div class="stage-card flex-1 text-center mx-4" style="color: #3b82f6;">
                 <div class="icon-container w-32 h-32 rounded-2xl mx-auto mb-6 flex items-center justify-center floating" style="animation-delay: 0.5s;">