diff --git a/frontend-web/src/open-canvas/components/ai-writing/CompletedInterventionCard.tsx b/frontend-web/src/open-canvas/components/ai-writing/CompletedInterventionCard.tsx
index db95fb3c..94f9c682 100644
--- a/frontend-web/src/open-canvas/components/ai-writing/CompletedInterventionCard.tsx
+++ b/frontend-web/src/open-canvas/components/ai-writing/CompletedInterventionCard.tsx
@@ -46,8 +46,14 @@ function MaterialCompleted({ record, expanded, onToggle }: { record: CompletedIn
         <CheckCircle2 className="size-3.5 text-green-500 shrink-0" />
         <FileText className="size-3.5 text-blue-500 shrink-0" />
         <span className="flex-1 font-medium">
-          已确认{' '}
-          <span className="text-muted-foreground font-normal">{count} 条素材</span>
+          {count === 0 && record.action !== 're_search' ? (
+            '已在无素材的情况下继续写作'
+          ) : (
+            <>
+              已确认{' '}
+              <span className="text-muted-foreground font-normal">{count} 条素材</span>
+            </>
+          )}
         </span>
         {count > 0 && (
           expanded
diff --git a/frontend-web/src/open-canvas/components/ai-writing/InterventionCard.tsx b/frontend-web/src/open-canvas/components/ai-writing/InterventionCard.tsx
index 824b9567..65526f27 100644
--- a/frontend-web/src/open-canvas/components/ai-writing/InterventionCard.tsx
+++ b/frontend-web/src/open-canvas/components/ai-writing/InterventionCard.tsx
@@ -118,6 +118,50 @@ function MaterialConfirmCard({ materials, onSubmit, disabled }: MaterialConfirmC
 
   const hasExtra = extraKeywords.length > 0;
 
+  // 空数据态：未检索到任何素材，提示用户重新搜索或在无素材情况下继续
+  if (materials.length === 0) {
+    return (
+      <div className="rounded-md border border-amber-200 bg-amber-50/50 dark:border-amber-900/40 dark:bg-amber-950/20 space-y-3 p-3">
+        <div className="flex items-start gap-2">
+          <ShieldAlert className="size-4 text-amber-500 shrink-0 mt-0.5" />
+          <div>
+            <p className="text-xs font-medium">未检索到任何素材</p>
+            <p className="text-xs text-muted-foreground mt-0.5">
+              素材收集专家本次没有检索到相关数据。你可以补充关键词重新搜索，或在无素材的情况下直接继续写作（文章将仅依据写作意图生成）。
+            </p>
+          </div>
+        </div>
+
+        <MaterialsToolbar
+          materials={materials}
+          selectedIds={selectedIds}
+          onSelectAll={() => setSelectedIds(new Set())}
+          onDeselectAll={() => setSelectedIds(new Set())}
+          extraKeywords={extraKeywords}
+          onAddKeyword={(kw) => setExtraKeywords((prev) => [...prev, kw])}
+          onRemoveKeyword={(kw) => setExtraKeywords((prev) => prev.filter((k) => k !== kw))}
+        />
+
+        <div className="flex gap-2 pt-1">
+          <Button
+            type="button" size="sm" className="flex-1 h-8 text-xs gap-1.5"
+            onClick={handleReSearch} disabled={disabled || submitting}
+          >
+            {hasExtra
+              ? <><Search className="size-3.5" />追加搜索</>
+              : <><RotateCcw className="size-3.5" />重新搜索</>}
+          </Button>
+          <Button
+            type="button" variant="outline" size="sm" className="h-8 text-xs gap-1.5 shrink-0"
+            onClick={handleConfirm} disabled={disabled || submitting}
+          >
+            <ArrowRight className="size-3.5" />无数据继续写作
+          </Button>
+        </div>
+      </div>
+    );
+  }
+
   return (
     <div className="rounded-md border bg-background space-y-3 p-3">
       <div className="flex items-start gap-2">
diff --git a/frontend-web/src/open-canvas/components/ai-writing/MaterialsToolbar.tsx b/frontend-web/src/open-canvas/components/ai-writing/MaterialsToolbar.tsx
index 0bd4c08e..aa38973e 100644
--- a/frontend-web/src/open-canvas/components/ai-writing/MaterialsToolbar.tsx
+++ b/frontend-web/src/open-canvas/components/ai-writing/MaterialsToolbar.tsx
@@ -34,20 +34,22 @@ export function MaterialsToolbar({
 
   return (
     <div className="space-y-2">
-      {/* 全选/取消 */}
-      <div className="flex items-center gap-2">
-        <span className="text-xs text-muted-foreground">
-          已选 {selectedIds.size} / {materials.length} 条素材
-        </span>
-        <div className="flex-1" />
-        <button
-          type="button"
-          onClick={allSelected ? onDeselectAll : onSelectAll}
-          className="text-xs text-primary hover:underline"
-        >
-          {allSelected ? '取消全选' : '全选'}
-        </button>
-      </div>
+      {/* 全选/取消（无素材时隐藏） */}
+      {materials.length > 0 && (
+        <div className="flex items-center gap-2">
+          <span className="text-xs text-muted-foreground">
+            已选 {selectedIds.size} / {materials.length} 条素材
+          </span>
+          <div className="flex-1" />
+          <button
+            type="button"
+            onClick={allSelected ? onDeselectAll : onSelectAll}
+            className="text-xs text-primary hover:underline"
+          >
+            {allSelected ? '取消全选' : '全选'}
+          </button>
+        </div>
+      )}
 
       {/* 补充关键词 */}
       <div className="space-y-1.5">
diff --git a/frontend-web/src/open-canvas/components/artifact/TextArtifactRenderer.tsx b/frontend-web/src/open-canvas/components/artifact/TextArtifactRenderer.tsx
index a2b12ad5..23bca574 100644
--- a/frontend-web/src/open-canvas/components/artifact/TextArtifactRenderer.tsx
+++ b/frontend-web/src/open-canvas/components/artifact/TextArtifactRenderer.tsx
@@ -204,7 +204,7 @@ export function TextArtifactRenderer({ content, isStreaming }: TextArtifactRende
                   </h3>
                 ),
                 p: ({ children }) => (
-                  <p className="mb-4 leading-[1.8] text-[15px] text-foreground">
+                  <p className="mb-4 leading-[1.8] text-[15px] text-foreground indent-[2em]">
                     {children}
                   </p>
                 ),
diff --git a/frontend-web/src/styles/globals.css b/frontend-web/src/styles/globals.css
index c7d0036d..3b8f86da 100644
--- a/frontend-web/src/styles/globals.css
+++ b/frontend-web/src/styles/globals.css
@@ -579,6 +579,7 @@
   line-height: 1.8;
   font-size: 0.9375rem; /* 15px */
   color: var(--foreground);
+  text-indent: 2em; /* 段落首行缩进 */
 }
 
 .tiptap-writing-editor .ProseMirror h1 {
@@ -658,6 +659,7 @@
 
 .tiptap-writing-editor .ProseMirror li > p {
   margin-bottom: 0.25rem;
+  text-indent: 0; /* 列表项内段落不缩进 */
 }
 
 .tiptap-writing-editor .ProseMirror blockquote {
@@ -716,6 +718,10 @@
 }
 
 /* Placeholder */
+.tiptap-writing-editor .ProseMirror p.is-editor-empty:first-child {
+  text-indent: 0; /* 占位文案不缩进 */
+}
+
 .tiptap-writing-editor .ProseMirror p.is-editor-empty:first-child::before {
   content: attr(data-placeholder);
   color: var(--muted-foreground);
diff --git a/offline-backend-20260512/backend/packages/harness/deerflow/agents/ai_writing/nodes/researcher.py b/offline-backend-20260512/backend/packages/harness/deerflow/agents/ai_writing/nodes/researcher.py
index 59639aa2..361f3394 100644
--- a/offline-backend-20260512/backend/packages/harness/deerflow/agents/ai_writing/nodes/researcher.py
+++ b/offline-backend-20260512/backend/packages/harness/deerflow/agents/ai_writing/nodes/researcher.py
@@ -140,6 +140,10 @@ async def researcher_node(state: AIWritingState, config: RunnableConfig) -> dict
         materials = sorted(raw_materials, key=lambda m: m.get("relevance_score", 0), reverse=True)[:_MAX_MATERIALS]
         summary = f"共搜索到{len(raw_materials)}条素材，精选{len(materials)}条"
 
+    # 空结果兜底：未检索到任何素材时给出明确文案，前端据此弹出「无数据继续」选项
+    if not materials:
+        summary = "未检索到相关素材，可重新搜索或在无素材的情况下继续写作"
+
     pkg = MaterialPackage(keywords=keywords, materials=materials, summary=summary)
 
     return {