diff --git a/src/pages/OmniEditor.tsx b/src/pages/OmniEditor.tsx
index 9787f4c..0bab109 100644
--- a/src/pages/OmniEditor.tsx
+++ b/src/pages/OmniEditor.tsx
@@ -170,6 +170,7 @@ const OmniEditor: React.FC = () => {
   const [dragState, setDragState] = useState<{ id: string; startX: number; startY: number; nodeX: number; nodeY: number } | null>(null);
   const [bottomTab, setBottomTab] = useState<'agents' | 'variables' | 'sensing' | 'internalModels' | 'schedule' | 'data' | 'io' | 'validation'>('variables');
   const [isDetailOpen, setIsDetailOpen] = useState(false);
+  const [isPipelineMenuOpen, setIsPipelineMenuOpen] = useState(false);
   const [showInitModal, setShowInitModal] = useState(!!location.state?.fromLanding);
   const [selectedSpaceType, setSelectedSpaceType] = useState<InitialSpaceType>('grid');
   const [canvasSize, setCanvasSize] = useState({ width: 0, height: 0 });
@@ -575,28 +576,6 @@ const OmniEditor: React.FC = () => {
                       : '当前默认收起 AI：先把右侧图形化模型编辑器作为主工作区。'}
                   </p>
                 </div>
-                <div className="p-3 rounded-lg bg-white border border-slate-200 shadow-sm">
-                  <div className="text-[10px] font-black uppercase tracking-widest text-slate-400 mb-3">Pipeline Nodes</div>
-                  <div className="grid grid-cols-2 gap-2">
-                    {[
-                      ['Data Source', Database, 'Excel / raw data entry'],
-                      ['Parameter Table', Table2, 'Model-ready parameters'],
-                      ['Validation', CheckCircle, 'Rules and checks'],
-                      ['Model Output', Layers3, 'Simulation outputs'],
-                    ].map(([label, Icon, desc]) => (
-                      <button
-                        key={label as string}
-                        onClick={() => handleAction(label as string)}
-                        className="text-left p-3 rounded-lg border border-slate-200 bg-slate-50 hover:bg-white hover:border-blue-200 transition-all"
-                        title={desc as string}
-                      >
-                        <Icon className="w-4 h-4 text-blue-600 mb-2" />
-                        <div className="text-[11px] font-black text-slate-800">{label as string}</div>
-                        <div className="text-[10px] text-slate-400 mt-1 leading-snug">{desc as string}</div>
-                      </button>
-                    ))}
-                  </div>
-                </div>
                 {messages.map((msg, index) => (
                   <div key={`${msg.role}-${index}`} className={`flex flex-col gap-1 ${msg.role === 'user' ? 'items-end' : ''}`}>
                     <span className="text-[10px] text-slate-400 font-black uppercase tracking-wider">
@@ -649,10 +628,44 @@ const OmniEditor: React.FC = () => {
                   </span>
                   <div>
                     <span className="block text-[10px] font-black uppercase tracking-[0.2em] text-slate-500">Model Subjects</span>
-                    <span className="block text-[10px] text-slate-400">Environment, space, agents, observation and behaviors</span>
                   </div>
                 </div>
                 <div className="flex items-center gap-2">
+                  <div className="relative">
+                    <button
+                      onClick={() => setIsPipelineMenuOpen((open) => !open)}
+                      className="px-3 py-1.5 bg-white hover:bg-slate-50 text-blue-600 text-[10px] font-black rounded-md border border-slate-200 shadow-sm transition-all uppercase flex items-center gap-2"
+                    >
+                      <Workflow className="w-3.5 h-3.5" /> Pipeline Nodes
+                      <ChevronDown className={`w-3.5 h-3.5 text-slate-400 transition-transform ${isPipelineMenuOpen ? 'rotate-180' : ''}`} />
+                    </button>
+                    {isPipelineMenuOpen && (
+                      <div className="absolute right-0 top-10 z-30 w-64 rounded-lg border border-slate-200 bg-white p-2 shadow-xl">
+                        {[
+                          ['Data Source', Database, 'Excel / raw data entry'],
+                          ['Parameter Table', Table2, 'Model-ready parameters'],
+                          ['Validation', CheckCircle, 'Rules and checks'],
+                          ['Model Output', Layers3, 'Simulation outputs'],
+                        ].map(([label, Icon, desc]) => (
+                          <button
+                            key={label as string}
+                            onClick={() => {
+                              setIsPipelineMenuOpen(false);
+                              handleAction(label as string);
+                            }}
+                            className="w-full text-left p-3 rounded-md hover:bg-blue-50 transition-colors flex items-start gap-3"
+                            title={desc as string}
+                          >
+                            <Icon className="w-4 h-4 text-blue-600 mt-0.5 shrink-0" />
+                            <span>
+                              <span className="block text-[12px] font-black text-slate-900">{label as string}</span>
+                              <span className="block text-[11px] text-slate-400 mt-1 leading-snug">{desc as string}</span>
+                            </span>
+                          </button>
+                        ))}
+                      </div>
+                    )}
+                  </div>
                   <button
                     onClick={() => setSelectedNodeId('grid-space')}
                     className="px-3 py-1.5 bg-white hover:bg-slate-50 text-emerald-600 text-[10px] font-black rounded-md border border-slate-200 shadow-sm transition-all uppercase flex items-center gap-2"