diff --git a/src/components/Export/ExportDefaultsSettingsForm.scss b/src/components/Export/ExportDefaultsSettingsForm.scss
index ccfa2bd..f570820 100644
--- a/src/components/Export/ExportDefaultsSettingsForm.scss
+++ b/src/components/Export/ExportDefaultsSettingsForm.scss
@@ -359,8 +359,19 @@
       margin-bottom: 0;
     }
 
+    .format-setting-group {
+      grid-template-columns: 1fr;
+      gap: 10px;
+      align-items: stretch;
+    }
+
+    .format-setting-group .form-control {
+      justify-content: flex-start;
+    }
+
     .format-grid {
-      max-width: 360px;
+      max-width: none;
+      grid-template-columns: repeat(3, minmax(0, 1fr));
       margin-bottom: 0;
     }
   }
@@ -384,5 +395,9 @@
     .format-grid {
       max-width: none;
     }
+
+    .format-grid {
+      grid-template-columns: repeat(auto-fit, minmax(156px, 1fr));
+    }
   }
 }
diff --git a/src/components/Export/ExportDefaultsSettingsForm.tsx b/src/components/Export/ExportDefaultsSettingsForm.tsx
index 681a3ee..974aa19 100644
--- a/src/components/Export/ExportDefaultsSettingsForm.tsx
+++ b/src/components/Export/ExportDefaultsSettingsForm.tsx
@@ -145,7 +145,7 @@ export function ExportDefaultsSettingsForm({
         </div>
       </div>
 
-      <div className="form-group">
+      <div className="form-group format-setting-group">
         <div className="form-copy">
           <label>聊天消息默认导出格式</label>
           <span className="form-hint">导出页面默认选中的格式</span>
diff --git a/src/pages/ExportPage.scss b/src/pages/ExportPage.scss
index 81fd177..a7d9683 100644
--- a/src/pages/ExportPage.scss
+++ b/src/pages/ExportPage.scss
@@ -2858,6 +2858,66 @@
   }
 }
 
+.dialog-format-select {
+  position: relative;
+  min-width: 220px;
+}
+
+.dialog-format-dropdown {
+  position: absolute;
+  top: calc(100% + 6px);
+  right: 0;
+  width: min(360px, calc(100vw - 64px));
+  background: color-mix(in srgb, var(--bg-primary) 85%, var(--bg-secondary));
+  border: 1px solid var(--border-color);
+  border-radius: 12px;
+  padding: 6px;
+  box-shadow: var(--shadow-md);
+  z-index: 120;
+  max-height: 320px;
+  overflow-y: auto;
+  backdrop-filter: blur(14px);
+  -webkit-backdrop-filter: blur(14px);
+}
+
+.dialog-format-option {
+  width: 100%;
+  text-align: left;
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+  padding: 10px 12px;
+  border: none;
+  border-radius: 10px;
+  background: transparent;
+  cursor: pointer;
+  transition: all 0.15s;
+  color: var(--text-primary);
+  font-size: 14px;
+
+  &:hover {
+    background: var(--bg-tertiary);
+  }
+
+  &.active {
+    background: color-mix(in srgb, var(--primary) 12%, transparent);
+    color: var(--primary);
+  }
+
+  .option-label {
+    font-weight: 500;
+  }
+
+  .option-desc {
+    font-size: 12px;
+    color: var(--text-tertiary);
+  }
+
+  &.active .option-desc {
+    color: var(--primary);
+  }
+}
+
 .scope-tag-row {
   display: flex;
   align-items: center;
diff --git a/src/pages/ExportPage.tsx b/src/pages/ExportPage.tsx
index b329a0e..5d243a8 100644
--- a/src/pages/ExportPage.tsx
+++ b/src/pages/ExportPage.tsx
@@ -1320,6 +1320,7 @@ function ExportPage() {
     sessionNames: [],
     title: ''
   })
+  const [showSessionFormatSelect, setShowSessionFormatSelect] = useState(false)
 
   const [tasks, setTasks] = useState<ExportTask[]>([])
   const [lastExportBySession, setLastExportBySession] = useState<Record<string, number>>({})
@@ -1354,6 +1355,7 @@ function ExportPage() {
   const contactsAvatarCacheRef = useRef<Record<string, configService.ContactsAvatarCacheEntry>>({})
   const contactsVirtuosoRef = useRef<VirtuosoHandle | null>(null)
   const sessionTableSectionRef = useRef<HTMLDivElement | null>(null)
+  const sessionFormatDropdownRef = useRef<HTMLDivElement | null>(null)
   const detailRequestSeqRef = useRef(0)
   const sessionsRef = useRef<SessionRow[]>([])
   const sessionContentMetricsRef = useRef<Record<string, SessionContentMetric>>({})
@@ -4801,6 +4803,24 @@ function ExportPage() {
     return () => window.removeEventListener('keydown', handleKeyDown)
   }, [closeSessionSnsTimeline, sessionSnsTimelineTarget])
 
+  useEffect(() => {
+    if (!showSessionFormatSelect) return
+    const handlePointerDown = (event: MouseEvent) => {
+      const target = event.target as Node
+      if (sessionFormatDropdownRef.current && !sessionFormatDropdownRef.current.contains(target)) {
+        setShowSessionFormatSelect(false)
+      }
+    }
+    document.addEventListener('mousedown', handlePointerDown)
+    return () => document.removeEventListener('mousedown', handlePointerDown)
+  }, [showSessionFormatSelect])
+
+  useEffect(() => {
+    if (!exportDialog.open) {
+      setShowSessionFormatSelect(false)
+    }
+  }, [exportDialog.open])
+
   const handleCopyDetailField = useCallback(async (text: string, field: string) => {
     try {
       await navigator.clipboard.writeText(text)
@@ -4894,14 +4914,19 @@ function ExportPage() {
   const formatCandidateOptions = exportDialog.scope === 'sns'
     ? snsFormatOptions
     : formatOptions
+  const isSessionScopeDialog = exportDialog.scope === 'single' || exportDialog.scope === 'multi'
   const isContentScopeDialog = exportDialog.scope === 'content'
   const isContentTextDialog = isContentScopeDialog && exportDialog.contentType === 'text'
+  const useCollapsedSessionFormatSelector = isSessionScopeDialog
   const shouldShowFormatSection = !isContentScopeDialog || isContentTextDialog
   const shouldShowMediaSection = !isContentScopeDialog
   const avatarExportStatusLabel = options.exportAvatars ? '已开启聊天消息导出带头像' : '已关闭聊天消息导出带头像'
   const textContentFormatNote = options.exportAvatars
     ? '此模式包含用户头像，不导出图片语音视频表情包等多媒体内容'
     : '此模式不包含用户头像，不导出图片语音视频表情包等多媒体内容'
+  const activeDialogFormatLabel = exportDialog.scope === 'sns'
+    ? (snsFormatOptions.find(option => option.value === snsExportFormat)?.label ?? snsExportFormat)
+    : (formatOptions.find(option => option.value === options.format)?.label ?? options.format)
   const shouldShowDisplayNameSection = !(
     exportDialog.scope === 'sns' ||
     (
@@ -6057,33 +6082,69 @@ function ExportPage() {
 
               {shouldShowFormatSection && (
                 <div className="dialog-section">
-                  <h4>{exportDialog.scope === 'sns' ? '朋友圈导出格式选择' : '对话文本导出格式选择'}</h4>
+                  {useCollapsedSessionFormatSelector ? (
+                    <div className="section-header-action">
+                      <h4>对话文本导出格式选择</h4>
+                      <div className="dialog-format-select" ref={sessionFormatDropdownRef}>
+                        <button
+                          type="button"
+                          className={`time-range-trigger ${showSessionFormatSelect ? 'open' : ''}`}
+                          onClick={() => setShowSessionFormatSelect(prev => !prev)}
+                        >
+                          <span>{activeDialogFormatLabel}</span>
+                          <span className="time-range-arrow">&gt;</span>
+                        </button>
+                        {showSessionFormatSelect && (
+                          <div className="dialog-format-dropdown">
+                            {formatOptions.map(option => (
+                              <button
+                                key={option.value}
+                                type="button"
+                                className={`dialog-format-option ${options.format === option.value ? 'active' : ''}`}
+                                onClick={() => {
+                                  setOptions(prev => ({ ...prev, format: option.value as TextExportFormat }))
+                                  setShowSessionFormatSelect(false)
+                                }}
+                              >
+                                <span className="option-label">{option.label}</span>
+                                <span className="option-desc">{option.desc}</span>
+                              </button>
+                            ))}
+                          </div>
+                        )}
+                      </div>
+                    </div>
+                  ) : (
+                    <h4>{exportDialog.scope === 'sns' ? '朋友圈导出格式选择' : '对话文本导出格式选择'}</h4>
+                  )}
                   {!isContentScopeDialog && exportDialog.scope !== 'sns' && (
                     <div className="format-note">{avatarExportStatusLabel}</div>
                   )}
                   {isContentTextDialog && (
                     <div className="format-note">{textContentFormatNote}</div>
                   )}
-                  <div className="format-grid">
-                    {formatCandidateOptions.map(option => (
-                      <button
-                        key={option.value}
-                        className={`format-card ${exportDialog.scope === 'sns'
-                          ? (snsExportFormat === option.value ? 'active' : '')
-                          : (options.format === option.value ? 'active' : '')}`}
-                        onClick={() => {
-                          if (exportDialog.scope === 'sns') {
-                            setSnsExportFormat(option.value as SnsTimelineExportFormat)
-                          } else {
-                            setOptions(prev => ({ ...prev, format: option.value as TextExportFormat }))
-                          }
-                        }}
-                      >
-                        <div className="format-label">{option.label}</div>
-                        <div className="format-desc">{option.desc}</div>
-                      </button>
-                    ))}
-                  </div>
+                  {!useCollapsedSessionFormatSelector && (
+                    <div className="format-grid">
+                      {formatCandidateOptions.map(option => (
+                        <button
+                          key={option.value}
+                          className={`format-card ${exportDialog.scope === 'sns'
+                            ? (snsExportFormat === option.value ? 'active' : '')
+                            : (options.format === option.value ? 'active' : '')}`}
+                          onClick={() => {
+                            if (exportDialog.scope === 'sns') {
+                              setSnsExportFormat(option.value as SnsTimelineExportFormat)
+                            } else {
+                              setOptions(prev => ({ ...prev, format: option.value as TextExportFormat }))
+                            }
+                          }}
+                        >
+                          <div className="format-label">{option.label}</div>
+                          <div className="format-desc">{option.desc}</div>
+                        </button>
+                      ))}
+                    </div>
+                  )}
                 </div>
               )}