Restore research direction numbering

Author: Vericoware

index.html

@@ -80,6 +80,7 @@ <h2>Four shared directions for open 3D world models</h2>
         </div>
         <div class="direction-grid">
           <article class="direction-card">
+            <span class="index">01</span>
             <h3>Foundation Representation and Manipulation</h3>
             <p>
               Compact and controllable 3D asset representations for reconstruction,
@@ -92,6 +93,7 @@ <h3>Foundation Representation and Manipulation</h3>
             </ul>
           </article>
           <article class="direction-card">
+            <span class="index">02</span>
             <h3>Spatial Understanding and Synthesis</h3>
             <p>
               Agentic generation pipelines and engine-grounded tools for coherent 3D
@@ -104,6 +106,7 @@ <h3>Spatial Understanding and Synthesis</h3>
             </ul>
           </article>
           <article class="direction-card">
+            <span class="index">03</span>
             <h3>Interaction Dynamics and Motion</h3>
             <p>
               Expressive avatars, human-scene interaction, and multi-person motion
@@ -116,6 +119,7 @@ <h3>Interaction Dynamics and Motion</h3>
             </ul>
           </article>
           <article class="direction-card">
+            <span class="index">04</span>
             <h3>Decision Intelligence and Reasoning</h3>
             <p>
               LLM-based reasoning, language-guided planning, reinforcement learning,

styles.css

@@ -331,6 +331,14 @@ h3 {
   border-top: 4px solid var(--cyan);
 }
 
+.index {
+  display: block;
+  margin-bottom: 28px;
+  color: var(--red);
+  font-size: 14px;
+  font-weight: 900;
+}
+
 .direction-card p,
 .direction-card li,
 .project-card span,