diff --git a/frontend/src/lib/mind-elixir/src/index.less b/frontend/src/lib/mind-elixir/src/index.less
index fc78e70..4b68f81 100644
--- a/frontend/src/lib/mind-elixir/src/index.less
+++ b/frontend/src/lib/mind-elixir/src/index.less
@@ -235,11 +235,61 @@
     max-width: 35em;
     white-space: pre-wrap;
     pointer-events: all;
-    // 确保整个节点内容居中对齐
+    // 默认居中对齐，但会根据是否有图片动态调整
     text-align: center !important;
     flex-direction: column !important;
     align-items: center !important;
     justify-content: center !important;
+    
+    // 没有图片的节点使用左对齐
+    &.no-image {
+      text-align: left !important;
+      align-items: flex-start !important;
+      
+      .text {
+        text-align: left !important;
+      }
+      
+      ul, ol {
+        text-align: left !important;
+        padding-left: 20px !important;
+        list-style-position: outside !important;
+      }
+      
+      li {
+        text-align: left !important;
+        list-style-position: outside !important;
+      }
+      
+      p, span, div, strong, em {
+        text-align: left !important;
+      }
+    }
+    
+    // 有图片的节点保持居中对齐
+    &.has-image {
+      text-align: center !important;
+      align-items: center !important;
+      
+      .text {
+        text-align: center !important;
+      }
+      
+      ul, ol {
+        text-align: center !important;
+        padding-left: 0 !important;
+        list-style-position: inside !important;
+      }
+      
+      li {
+        text-align: center !important;
+        list-style-position: inside !important;
+      }
+      
+      p, span, div, strong, em {
+        text-align: center !important;
+      }
+    }
     box-sizing: border-box !important;
     // 确保节点有固定的最小高度，避免内容变化导致尺寸不稳定
     min-height: 2em !important;
@@ -260,7 +310,6 @@
     }
     & > .text {
       display: block !important;
-      text-align: center !important; // 确保文本居中对齐，避免与连线错位
       width: 100% !important; // 确保文本容器占满节点宽度
       margin: 0 auto !important; // 强制居中
       // 确保文本不会导致节点尺寸不稳定
diff --git a/frontend/src/lib/mind-elixir/src/plugin/exportImage.ts b/frontend/src/lib/mind-elixir/src/plugin/exportImage.ts
index a0e1702..1b775b6 100644
--- a/frontend/src/lib/mind-elixir/src/plugin/exportImage.ts
+++ b/frontend/src/lib/mind-elixir/src/plugin/exportImage.ts
@@ -35,16 +35,36 @@ function generateSvgText(tpc: HTMLElement, tpcStyle: CSSStyleDeclaration, x: num
   const paddingTop = parseInt(tpcStyle.paddingTop) || 8
   const paddingLeft = parseInt(tpcStyle.paddingLeft) || 8
   
-  // 计算节点宽度用于居中
+  // 计算节点宽度和文本起始位置
   const nodeWidth = tpc.offsetWidth || 200
-  const centerX = x + nodeWidth / 2
+  const textX = x + paddingLeft // 纯文本节点使用左对齐
+  
+  // 计算实际需要的内容高度
+  const contentHeight = (lines.length - 1) * lineHeight + fontSize + paddingTop + (parseInt(tpcStyle.paddingBottom) || 8)
+  const nodeHeight = tpc.offsetHeight || 100
+  const actualHeight = Math.min(contentHeight, nodeHeight) // 不超过原始节点高度
+  
+  // 创建背景矩形，使用计算出的实际高度
+  const bg = document.createElementNS(ns, 'rect')
+  setAttributes(bg, {
+    x: x + '',
+    y: y + '',
+    rx: tpcStyle.borderRadius || '8',
+    ry: tpcStyle.borderRadius || '8',
+    width: nodeWidth + 'px',
+    height: actualHeight + 'px',
+    fill: tpcStyle.backgroundColor || 'white',
+    stroke: tpcStyle.borderColor || '#ccc',
+    'stroke-width': tpcStyle.borderWidth || '1',
+  })
+  g.appendChild(bg)
   
   lines.forEach((line, index) => {
     const text = document.createElementNS(ns, 'text')
     setAttributes(text, {
-      x: centerX + '',
+      x: textX + '',
       y: y + paddingTop + fontSize + (lineHeight * index) + '',
-      'text-anchor': 'middle',
+      'text-anchor': 'start',
       'font-family': tpcStyle.fontFamily,
       'font-size': `${tpcStyle.fontSize}`,
       'font-weight': `${tpcStyle.fontWeight}`,
@@ -53,6 +73,13 @@ function generateSvgText(tpc: HTMLElement, tpcStyle: CSSStyleDeclaration, x: num
     text.innerHTML = line
     g.appendChild(text)
   })
+  
+  console.log('✅ generateSvgText优化了底部间距:', {
+    originalHeight: nodeHeight,
+    actualHeight: actualHeight,
+    linesCount: lines.length
+  })
+  
   return g
 }
 
@@ -331,6 +358,12 @@ function cleanHtmlForSvg(html: string): string {
   // 移除其他可能导致SVG解析错误的标签
   cleanedHtml = cleanedHtml.replace(/<br\s*\/?>/gi, ' ')
   
+  // 清理重复的格式标记
+  cleanedHtml = cleanedHtml.replace(/•\s*【/g, '【')
+  cleanedHtml = cleanedHtml.replace(/•\s*\[/g, '[')
+  cleanedHtml = cleanedHtml.replace(/•\s*（/g, '（')
+  cleanedHtml = cleanedHtml.replace(/•\s*\(/g, '(')
+  
   // 确保所有标签都正确闭合
   cleanedHtml = cleanedHtml.replace(/<([^>]+)>/g, (match, tagContent) => {
     // 检查是否是自闭合标签
@@ -403,12 +436,18 @@ function generateSvgTextUsingForeignObject(tpc: HTMLElement, tpcStyle: CSSStyleD
     const nodeWidth = rect.width
     const nodeHeight = rect.height
     
+    // 检查是否包含任何图片
+    const hasImages = cleanedHtml.includes('<img')
+    const hasNodeImage = tpcWithNodeObj.nodeObj && tpcWithNodeObj.nodeObj.image
+    const hasAnyImage = hasImages || hasNodeImage
+    
     console.log('🔍 使用getBoundingClientRect获取尺寸:', { 
       nodeWidth, 
       nodeHeight,
       offsetWidth: tpc.offsetWidth,
       offsetHeight: tpc.offsetHeight,
-      rect: rect
+      rect: rect,
+      hasAnyImage: hasAnyImage
     })
     
     // 尝试使用原生SVG文本渲染
@@ -435,15 +474,25 @@ function generateSvgTextUsingForeignObject(tpc: HTMLElement, tpcStyle: CSSStyleD
       if (lines.length > 0) {
         const fontSize = parseFloat(tpcStyle.fontSize) || 14
         const lineHeight = fontSize * 1.4
-        const centerX = x + nodeWidth / 2
-        const startY = y + fontSize + (parseInt(tpcStyle.paddingTop) || 8)
+        const paddingTop = parseInt(tpcStyle.paddingTop) || 8
+        const paddingBottom = parseInt(tpcStyle.paddingBottom) || 8
+        const paddingLeft = parseInt(tpcStyle.paddingLeft) || 8
+        
+        // 计算实际需要的内容高度
+        const contentHeight = (lines.length - 1) * lineHeight + fontSize + paddingTop + paddingBottom
+        const actualHeight = Math.min(contentHeight, nodeHeight) // 不超过原始节点高度
+        
+        // 检查是否包含图片
+        const hasImages = cleanedHtml.includes('<img')
+        const textX = hasImages ? x + nodeWidth / 2 : x + paddingLeft
+        const startY = y + fontSize + paddingTop
         
         lines.forEach((line, index) => {
           const text = document.createElementNS(ns, 'text')
           setAttributes(text, {
-            x: centerX + '',
+            x: textX + '',
             y: startY + (lineHeight * index) + '',
-            'text-anchor': 'middle',
+            'text-anchor': hasImages ? 'middle' : 'start',
             'font-family': tpcStyle.fontFamily,
             'font-size': tpcStyle.fontSize,
             'font-weight': tpcStyle.fontWeight,
@@ -453,8 +502,27 @@ function generateSvgTextUsingForeignObject(tpc: HTMLElement, tpcStyle: CSSStyleD
           g.appendChild(text)
         })
         
+        // 创建背景矩形，使用计算出的实际高度
+        const bg = document.createElementNS(ns, 'rect')
+        setAttributes(bg, {
+          x: x + '',
+          y: y + '',
+          rx: tpcStyle.borderRadius || '8',
+          ry: tpcStyle.borderRadius || '8',
+          width: nodeWidth + 'px',
+          height: actualHeight + 'px',
+          fill: tpcStyle.backgroundColor || 'white',
+          stroke: tpcStyle.borderColor || '#ccc',
+          'stroke-width': tpcStyle.borderWidth || '1',
+        })
+        g.insertBefore(bg, g.firstChild) // 将背景放在最前面
+        
         document.body.removeChild(tempDiv)
-        console.log('✅ 使用原生SVG文本渲染成功')
+        console.log('✅ 使用原生SVG文本渲染成功，优化了底部间距:', {
+          originalHeight: nodeHeight,
+          actualHeight: actualHeight,
+          linesCount: lines.length
+        })
         return g
       }
       
@@ -493,12 +561,12 @@ function generateSvgTextUsingForeignObject(tpc: HTMLElement, tpcStyle: CSSStyleD
       padding: ${paddingTop}px ${paddingRight}px ${paddingBottom}px ${paddingLeft}px;
       box-sizing: border-box;
       overflow: visible;
-      text-align: center !important;
+      text-align: ${hasAnyImage ? 'center' : 'left'} !important;
       line-height: 1.4;
       display: flex;
       flex-direction: column;
       justify-content: flex-start;
-      align-items: center;
+      align-items: ${hasAnyImage ? 'center' : 'flex-start'};
       position: relative;
     `
     
@@ -536,9 +604,9 @@ function generateSvgTextUsingForeignObject(tpc: HTMLElement, tpcStyle: CSSStyleD
       const htmlList = list as HTMLElement
       htmlList.style.cssText = `
         margin: 2px 0 4px 0 !important;
-        padding-left: 0 !important;
-        text-align: center !important;
-        list-style-position: inside !important;
+        padding-left: ${hasAnyImage ? '0' : '20px'} !important;
+        text-align: ${hasAnyImage ? 'center' : 'left'} !important;
+        list-style-position: ${hasAnyImage ? 'inside' : 'outside'} !important;
       `
     })
     
@@ -549,12 +617,12 @@ function generateSvgTextUsingForeignObject(tpc: HTMLElement, tpcStyle: CSSStyleD
         margin: 1px 0 !important;
         line-height: 1.2 !important;
         padding: 0 !important;
-        text-align: center !important;
-        list-style-position: inside !important;
+        text-align: ${hasAnyImage ? 'center' : 'left'} !important;
+        list-style-position: ${hasAnyImage ? 'inside' : 'outside'} !important;
       `
     })
     
-    // 为段落文本添加居中样式
+    // 为段落文本添加样式
     const paragraphs = div.querySelectorAll('p')
     paragraphs.forEach(p => {
       const htmlP = p as HTMLElement
@@ -562,27 +630,17 @@ function generateSvgTextUsingForeignObject(tpc: HTMLElement, tpcStyle: CSSStyleD
         margin: 2px 0 !important;
         line-height: 1.4 !important;
         padding: 0 !important;
-        text-align: center !important;
+        text-align: ${hasAnyImage ? 'center' : 'left'} !important;
       `
     })
     
-    // 为所有文本元素添加居中样式
+    // 为所有文本元素添加样式
     const textElements = div.querySelectorAll('span, div, strong, em')
     textElements.forEach(element => {
       const htmlElement = element as HTMLElement
-      htmlElement.style.textAlign = 'center !important'
+      htmlElement.style.textAlign = `${hasAnyImage ? 'center' : 'left'} !important`
     })
     
-    // 添加全局CSS样式确保所有内容居中
-    const style = document.createElement('style')
-    style.textContent = `
-      * {
-        text-align: center !important;
-        margin-left: auto !important;
-        margin-right: auto !important;
-      }
-    `
-    div.appendChild(style)
     
     // 为图片元素添加特殊样式处理，彻底解决图片压线问题
     const images = div.querySelectorAll('img')
@@ -637,11 +695,12 @@ function createElBox(mei: MindElixirInstance, tpc: Topic) {
   const tpcStyle = getComputedStyle(tpc)
   const { offsetLeft: x, offsetTop: y } = getOffsetLT(mei.nodes, tpc)
 
-  // 检查是否有HTML内容或节点图片，如果有则增加高度
-  const tpcWithNodeObj = tpc as Topic
-  const hasHTMLContent = tpcWithNodeObj.nodeObj && tpcWithNodeObj.nodeObj.dangerouslySetInnerHTML
-  const hasImages = hasHTMLContent && tpcWithNodeObj.nodeObj.dangerouslySetInnerHTML?.includes('<img')
-  const hasNodeImage = tpcWithNodeObj.nodeObj && tpcWithNodeObj.nodeObj.image
+    // 检查是否有HTML内容或节点图片，如果有则增加高度
+    const tpcWithNodeObj = tpc as Topic
+    const hasHTMLContent = tpcWithNodeObj.nodeObj && tpcWithNodeObj.nodeObj.dangerouslySetInnerHTML
+    const hasImages = hasHTMLContent && tpcWithNodeObj.nodeObj.dangerouslySetInnerHTML?.includes('<img')
+    const hasNodeImage = tpcWithNodeObj.nodeObj && tpcWithNodeObj.nodeObj.image
+    const hasAnyImage = hasImages || hasNodeImage // 判断是否包含任何图片
   
   const bg = document.createElementNS(ns, 'rect')
   const rect = tpc.getBoundingClientRect()
diff --git a/frontend/src/lib/mind-elixir/src/utils/dom.ts b/frontend/src/lib/mind-elixir/src/utils/dom.ts
index dad5fb4..27a53d4 100644
--- a/frontend/src/lib/mind-elixir/src/utils/dom.ts
+++ b/frontend/src/lib/mind-elixir/src/utils/dom.ts
@@ -26,7 +26,33 @@ export const shapeTpc = function (this: MindElixirInstance, tpc: Topic, nodeObj:
   }
 
   if (nodeObj.dangerouslySetInnerHTML) {
-    tpc.innerHTML = nodeObj.dangerouslySetInnerHTML
+    // 清理HTML内容，移除重复的格式
+    let cleanedHTML = nodeObj.dangerouslySetInnerHTML
+    
+    // 移除• 【这种重复格式
+    cleanedHTML = cleanedHTML.replace(/•\s*【/g, '【')
+    cleanedHTML = cleanedHTML.replace(/•\s*\[/g, '[')
+    
+    // 移除其他可能的重复格式
+    cleanedHTML = cleanedHTML.replace(/•\s*（/g, '（')
+    cleanedHTML = cleanedHTML.replace(/•\s*\(/g, '(')
+    
+    tpc.innerHTML = cleanedHTML
+    
+    // 检查是否包含图片，决定文本对齐方式
+    const hasImages = cleanedHTML.includes('<img')
+    const hasNodeImage = !!nodeObj.image
+    const hasAnyImage = hasImages || hasNodeImage
+    
+    // 应用智能文本对齐样式
+    if (hasAnyImage) {
+      tpc.classList.add('has-image')
+      tpc.classList.remove('no-image')
+    } else {
+      tpc.classList.add('no-image')
+      tpc.classList.remove('has-image')
+    }
+    
     return
   }
 
@@ -53,15 +79,37 @@ export const shapeTpc = function (this: MindElixirInstance, tpc: Topic, nodeObj:
     textEl.className = 'text'
 
     // Check if markdown parser is provided and topic contains markdown syntax
+    let content = ''
     if (this.markdown) {
-      textEl.innerHTML = this.markdown(nodeObj.topic, nodeObj)
+      content = this.markdown(nodeObj.topic, nodeObj)
     } else {
       // 直接设置文本内容，图片通过MindElixir原生image属性处理
-      textEl.innerHTML = nodeObj.topic || ''
+      content = nodeObj.topic || ''
     }
-
+    
+    // 清理文本内容，移除重复的格式
+    content = content.replace(/•\s*【/g, '【')
+    content = content.replace(/•\s*\[/g, '[')
+    content = content.replace(/•\s*（/g, '（')
+    content = content.replace(/•\s*\(/g, '(')
+    
+    textEl.innerHTML = content
     tpc.appendChild(textEl)
     tpc.text = textEl
+    
+    // 检查是否有图片，决定文本对齐方式
+    const hasNodeImage = !!nodeObj.image
+    const hasImageInText = content.includes('<img')
+    const hasAnyImage = hasNodeImage || hasImageInText
+    
+    // 应用智能文本对齐样式
+    if (hasAnyImage) {
+      tpc.classList.add('has-image')
+      tpc.classList.remove('no-image')
+    } else {
+      tpc.classList.add('no-image')
+      tpc.classList.remove('has-image')
+    }
   }
 
   if (nodeObj.hyperLink) {
@@ -229,6 +277,9 @@ export const editTopic = function (this: MindElixirInstance, el: Topic) {
 
     div.remove()
 
+    // 重新应用样式和清理逻辑
+    shapeTpc.call(this, el, node)
+
     if (inputContent === originalContent) return
 
     this.linkDiv()