diff --git a/packages/frontend/src/components/LayoutRenderer.vue b/packages/frontend/src/components/LayoutRenderer.vue
index 462b737..e7a6ba1 100644
--- a/packages/frontend/src/components/LayoutRenderer.vue
+++ b/packages/frontend/src/components/LayoutRenderer.vue
@@ -1,15 +1,16 @@
 <script setup lang="ts">
-import type { ConnectionInfo } from '../stores/connections.store'; 
-import { computed, defineAsyncComponent, type PropType, type Component, ref, watch, onMounted } from 'vue';
-import { useI18n } from 'vue-i18n'; 
+import type { ConnectionInfo } from '../stores/connections.store';
+import { computed, defineAsyncComponent, type PropType, type Component, ref, watch, onMounted, nextTick, type CSSProperties } from 'vue'; // Added nextTick and CSSProperties
+import { useI18n } from 'vue-i18n';
 
 import '@fortawesome/fontawesome-free/css/all.min.css';
 import { Splitpanes, Pane } from 'splitpanes';
 import { useLayoutStore, type LayoutNode, type PaneName } from '../stores/layout.store';
 import { useSessionStore } from '../stores/session.store';
 import { useFileEditorStore } from '../stores/fileEditor.store'; 
-import { useSettingsStore } from '../stores/settings.store'; 
-import { useSidebarResize } from '../composables/useSidebarResize'; 
+import { useSettingsStore } from '../stores/settings.store';
+import { useAppearanceStore } from '../stores/appearance.store'; // +++ Import appearance store +++
+import { useSidebarResize } from '../composables/useSidebarResize';
 import { storeToRefs } from 'pinia';
 
 
@@ -54,6 +55,16 @@ const sessionStore = useSessionStore();
 const fileEditorStore = useFileEditorStore(); // <-- Initialize FileEditorStore
 const settingsStore = useSettingsStore(); // +++ Initialize SettingsStore +++
 const { t } = useI18n(); // <-- Get translation function
+
+// +++ Appearance Store Refs +++
+const appearanceStore = useAppearanceStore();
+const {
+  terminalBackgroundImage,
+  isTerminalBackgroundEnabled,
+  currentTerminalBackgroundOverlayOpacity,
+  terminalCustomHTML,
+} = storeToRefs(appearanceStore);
+
 const { activeSession } = storeToRefs(sessionStore);
 const { workspaceSidebarPersistentBoolean, getSidebarPaneWidth } = storeToRefs(settingsStore);
 const { sidebarPanes } = storeToRefs(layoutStore);
@@ -66,6 +77,7 @@ const leftSidebarPanelRef = ref<HTMLElement | null>(null); // +++ Ref for left p
 const rightSidebarPanelRef = ref<HTMLElement | null>(null); // +++ Ref for right panel +++
 const leftResizeHandleRef = ref<HTMLElement | null>(null); // +++ Ref for left handle +++
 const rightResizeHandleRef = ref<HTMLElement | null>(null); // +++ Ref for right handle +++
+const customHtmlLayerRef = ref<HTMLElement | null>(null); // +++ Ref for custom HTML layer +++
 
 // --- Component Mapping ---
 // 使用 defineAsyncComponent 优化加载，并映射 PaneName 到实际组件
@@ -385,6 +397,74 @@ onMounted(() => {
   });
 });
 
+// +++ Background Image Style +++
+const terminalBackgroundImageStyle = computed((): CSSProperties => {
+  if (isTerminalBackgroundEnabled.value && terminalBackgroundImage.value && props.layoutNode.component === 'terminal') {
+    const backendUrl = import.meta.env.VITE_API_BASE_URL || '';
+    const imagePath = terminalBackgroundImage.value;
+    const fullImageUrl = `${backendUrl}${imagePath}`;
+    return {
+      backgroundImage: `url(${fullImageUrl})`,
+      backgroundSize: 'cover',
+      backgroundPosition: 'center',
+      backgroundRepeat: 'no-repeat',
+      position: 'absolute',
+      top: '0',
+      left: '0',
+      width: '100%',
+      height: '100%',
+      zIndex: 0, // Base layer for background
+    };
+  }
+  return {
+    backgroundImage: 'none',
+    position: 'absolute',
+    top: '0',
+    left: '0',
+    width: '100%',
+    height: '100%',
+    zIndex: 0,
+  };
+});
+
+// +++ Function to execute scripts (migrated from Terminal.vue) +++
+const executeScriptsInElement = (container: HTMLElement) => {
+  if (!container) return;
+  const scripts = Array.from(container.getElementsByTagName('script'));
+  scripts.forEach((oldScript) => {
+    const newScript = document.createElement('script');
+    Array.from(oldScript.attributes).forEach(attr => {
+      newScript.setAttribute(attr.name, attr.value);
+    });
+    if (oldScript.textContent) {
+      newScript.textContent = oldScript.textContent;
+    }
+    if (oldScript.parentNode) {
+      oldScript.parentNode.replaceChild(newScript, oldScript);
+    } else {
+       container.appendChild(newScript); // Fallback, though less likely if script was in container
+    }
+  });
+};
+
+// +++ Watch for changes in terminalCustomHTML and execute scripts (migrated) +++
+watch(terminalCustomHTML, (newHtmlContent, oldHtmlContent) => {
+  if (props.layoutNode.component !== 'terminal') return; // Only for terminal panes
+
+  if (newHtmlContent === oldHtmlContent && oldHtmlContent !== undefined) {
+    return;
+  }
+  nextTick(() => {
+    const container = customHtmlLayerRef.value;
+    if (container) {
+      if (newHtmlContent) {
+        executeScriptsInElement(container);
+      }
+    }
+  });
+}, { immediate: true });
+
+
 </script>
 
 <template>
@@ -438,24 +518,60 @@ onMounted(() => {
             <template v-else-if="layoutNode.type === 'pane'">
                 <!-- Terminal Pane: Render ALL SSH sessions, show only the active one -->
                <template v-if="layoutNode.component === 'terminal'">
-                   <div class="terminal-pane-container relative flex-grow overflow-hidden bg-background"> <!-- Add bg-background -->
+                   <div
+                       class="terminal-pane-container relative flex-grow overflow-hidden"
+                       :class="{ 'has-global-terminal-background': isTerminalBackgroundEnabled, 'bg-background': !isTerminalBackgroundEnabled }"
+                   >
+                       <!-- Shared Background Layers -->
+                       <div
+                           v-if="isTerminalBackgroundEnabled"
+                           class="shared-terminal-background-layers"
+                           style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 0;"
+                       >
+                           <!-- Background Image -->
+                           <div
+                               class="terminal-background-image-layer"
+                               :style="terminalBackgroundImageStyle"
+                           ></div>
+                           <!-- Color Overlay -->
+                           <div
+                               class="terminal-background-overlay-layer"
+                               :style="{
+                                   position: 'absolute', top: '0', left: '0', width: '100%', height: '100%',
+                                   backgroundColor: `rgba(0, 0, 0, ${currentTerminalBackgroundOverlayOpacity})`,
+                                   zIndex: 1, pointerEvents: 'none'
+                               }"
+                           ></div>
+                           <!-- Custom HTML -->
+                           <div
+                               ref="customHtmlLayerRef"
+                               v-if="terminalCustomHTML"
+                               class="terminal-custom-html-layer"
+                               style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 2;"
+                               v-html="terminalCustomHTML"
+                           ></div>
+                       </div>
+
+                       <!-- Terminal Instances -->
                        <template v-for="[sessionId, sessionState] in sessionStore.sessions" :key="sessionId">
-                           <!-- Only render terminals if terminalManager exists (indicates SSH) -->
                            <template v-if="sessionState.terminalManager">
-                                <keep-alive>
+                               <keep-alive>
                                    <component
                                        :is="componentMap.terminal"
                                        v-show="sessionId === activeSessionId"
                                        :session-id="sessionId"
                                        :is-active="sessionId === activeSessionId"
-                                       class="absolute inset-0 w-full h-full"
+                                       :class="['terminal-instance-wrapper absolute inset-0 w-full h-full', { 'terminal-transparent': isTerminalBackgroundEnabled }]"
+                                       :style="{ zIndex: 3 }"
                                        :options="{}"
                                    />
-                                </keep-alive>
+                               </keep-alive>
                            </template>
                        </template>
-                       <!-- Placeholder if no session is active or no SSH sessions exist -->
-                       <div v-if="!activeSessionId || !hasSshSessions" class="absolute inset-0 flex justify-center items-center text-center text-text-secondary bg-header text-sm p-4"> <!-- Use absolute positioning for placeholder too -->
+                       <!-- Placeholder -->
+                       <div v-if="!activeSessionId || !hasSshSessions"
+                            class="absolute inset-0 flex justify-center items-center text-center text-text-secondary bg-header text-sm p-4"
+                            :style="{ zIndex: 4 }">
                            <div class="flex flex-col items-center justify-center p-8 w-full h-full">
                                <i class="fas fa-plug text-4xl mb-3 text-text-secondary"></i>
                                <span class="text-lg font-medium text-text-secondary mb-2">{{ activeSessionId ? t('layout.noSshSessionActive.title', '无活动的 SSH 会话') : t('layout.noActiveSession.title') }}</span>
@@ -672,5 +788,15 @@ onMounted(() => {
   background-color: var(--border-color) !important; /* Override hover effect */
 }
 
+.terminal-pane-container.has-global-terminal-background .terminal-outer-wrapper.terminal-transparent {
+  background-color: transparent !important; /* 使 Terminal.vue 的最外层容器背景透明 */
+}
+
+.terminal-pane-container.has-global-terminal-background .terminal-outer-wrapper.terminal-transparent .terminal-inner-container .xterm-viewport,
+.terminal-pane-container.has-global-terminal-background .terminal-outer-wrapper.terminal-transparent .terminal-inner-container .xterm-screen {
+  background-color: transparent !important;
+}
+
+
 </style>
 
diff --git a/packages/frontend/src/components/Terminal.vue b/packages/frontend/src/components/Terminal.vue
index fc98979..50b1f82 100644
--- a/packages/frontend/src/components/Terminal.vue
+++ b/packages/frontend/src/components/Terminal.vue
@@ -29,7 +29,6 @@ const terminalOuterWrapperRef = ref<HTMLElement | null>(null); // 最外层容
 let terminal: Terminal | null = null;
 let fitAddon: FitAddon | null = null;
 let searchAddon: SearchAddon | null = null; // *** 添加 searchAddon 变量 ***
-const customHtmlLayerRef = ref<HTMLElement | null>(null); // Ref for the custom HTML layer
 let resizeObserver: ResizeObserver | null = null;
 let observedElement: HTMLElement | null = null; // +++ Store the observed element +++
 let debounceTimer: number | null = null; // 用于防抖的计时器 ID
@@ -49,11 +48,7 @@ const appearanceStore = useAppearanceStore();
 const {
   effectiveTerminalTheme,
   currentTerminalFontFamily,
-  terminalBackgroundImage,
   currentTerminalFontSize,
-  isTerminalBackgroundEnabled,
-  currentTerminalBackgroundOverlayOpacity, // 获取蒙版透明度
-  terminalCustomHTML, // 用于自定义终端背景 HTML
   // --- 文字描边和阴影状态 ---
   terminalTextStrokeEnabled,
   terminalTextStrokeWidth,
@@ -122,17 +117,6 @@ const fitAndEmitResizeNow = (term: Terminal) => {
 
 
             
-            // --- 稳定 customHtmlLayerRef 的尺寸 (确保在 DOM 更新后) ---
-            nextTick(() => {
-                if (customHtmlLayerRef.value && terminalRef.value) {
-                    const newWidth = terminalRef.value.offsetWidth;
-                    const newHeight = terminalRef.value.offsetHeight;
-                    customHtmlLayerRef.value.style.width = `${newWidth}px`;
-                    customHtmlLayerRef.value.style.height = `${newHeight}px`;
-                    console.log(`[Terminal ${props.sessionId}] customHtmlLayerRef stabilized (in nextTick) after immediate fit to: ${newWidth}x${newHeight}`);
-                }
-            });
-
             // 使用 nextTick 确保 fit() 的效果已反映，再触发 resize
             nextTick(() => {
                 // 再次检查终端实例是否仍然存在
@@ -332,16 +316,6 @@ onMounted(() => {
                   fitAddon?.fit();
                   // console.log(`[TerminalResizeObserver sessionId=${props.sessionId}] After fitAddon.fit(). New xterm_cols: ${terminal.cols}, xterm_rows: ${terminal.rows}`);
                   
-                  // --- 稳定 customHtmlLayerRef 的尺寸 (确保在DOM更新后) ---
-                  nextTick(() => {
-                    if (customHtmlLayerRef.value) {
-                        customHtmlLayerRef.value.style.width = `${roundedWidth}px`;
-                        customHtmlLayerRef.value.style.height = `${roundedHeight}px`;
-                        console.log(`[TerminalResizeObserver sessionId=${props.sessionId}] customHtmlLayerRef stabilized (in nextTick) after ResizeObserver fit to: ${roundedWidth}x${roundedHeight}`);
-                    }
-                  });
-                  // --- 稳定 customHtmlLayerRef 尺寸结束 ---
-
                   debouncedEmitResize(terminal); // This will log the cols/rows after debouncing
                  } catch (e) {
                     console.warn(`[TerminalResizeObserver sessionId=${props.sessionId}] Fit addon or debouncedEmitResize failed:`, e);
@@ -500,14 +474,6 @@ onMounted(() => {
         }
     });
 
-    // 监听背景图片和启用状态的变化
-    watch([terminalBackgroundImage, isTerminalBackgroundEnabled], () => {
-        console.log(`[Terminal Watcher] Background image or enabled status changed. Image: ${terminalBackgroundImage.value}, Enabled: ${isTerminalBackgroundEnabled.value}`);
-        applyTerminalBackground();
-    }, { immediate: true }); // 强制立即执行一次
-    // 移除 onMounted 中的 applyTerminalBackground 调用，完全依赖 watch
-    // applyTerminalBackground(); // 初始应用一次
-
     // 聚焦终端 (添加 null check)
     if (terminal) {
         terminal.focus();
@@ -747,120 +713,10 @@ watchEffect(() => {
   }
 });
  
-// --- 应用终端背景 ---
-const applyTerminalBackground = () => {
-    // 背景应用到 terminalOuterWrapperRef
-    if (terminalOuterWrapperRef.value) {
-        if (isTerminalBackgroundEnabled.value) {
-            // 只要启用了背景功能，就应该让 xterm 透明以显示下方内容
-            nextTick(() => {
-                if (terminalOuterWrapperRef.value) {
-                    terminalOuterWrapperRef.value.classList.add('has-terminal-background');
-                    if (terminalBackgroundImage.value) {
-                        const backendUrl = import.meta.env.VITE_API_BASE_URL || '';
-                        const imagePath = terminalBackgroundImage.value;
-                        const fullImageUrl = `${backendUrl}${imagePath}`;
-                        terminalOuterWrapperRef.value.style.backgroundImage = `url(${fullImageUrl})`;
-                        terminalOuterWrapperRef.value.style.backgroundSize = 'cover';
-                        terminalOuterWrapperRef.value.style.backgroundPosition = 'center';
-                        terminalOuterWrapperRef.value.style.backgroundRepeat = 'no-repeat';
-                        console.log(`[Terminal ${props.sessionId}] 应用终端背景图片: ${terminalBackgroundImage.value}`);
-                    } else {
-                        terminalOuterWrapperRef.value.style.backgroundImage = 'none';
-                        console.log(`[Terminal ${props.sessionId}] 终端背景功能已启用，但无背景图片，xterm 应透明。`);
-                    }
-                }
-            });
-        } else {
-            // 背景功能禁用
-            nextTick(() => {
-                 if (terminalOuterWrapperRef.value) {
-                    terminalOuterWrapperRef.value.style.backgroundImage = 'none';
-                    terminalOuterWrapperRef.value.classList.remove('has-terminal-background');
-                 }
-            });
-            console.log(`[Terminal ${props.sessionId}] 终端背景已禁用，移除背景。`);
-        }
-    }
-};
-
-// Function to execute scripts within an element
-const executeScriptsInElement = (container: HTMLElement) => {
-  if (!container) return;
-  console.log('[Terminal] Attempting to execute scripts in custom HTML container:', container);
-
-  const scripts = Array.from(container.getElementsByTagName('script'));
-  console.log(`[Terminal] Found ${scripts.length} script(s) in custom HTML.`);
-
-  scripts.forEach((oldScript, index) => {
-    console.log(`[Terminal] Processing script #${index + 1}:`, oldScript.outerHTML.substring(0, 100) + '...');
-    const newScript = document.createElement('script');
-
-    // Copy attributes (type, src, async, defer, etc.)
-    Array.from(oldScript.attributes).forEach(attr => {
-      newScript.setAttribute(attr.name, attr.value);
-      console.log(`[Terminal] Script #${index + 1}: Copied attribute ${attr.name}="${attr.value}"`);
-    });
-
-    // Copy content for inline scripts
-    if (oldScript.textContent) {
-      newScript.textContent = oldScript.textContent;
-      console.log(`[Terminal] Script #${index + 1}: Copied inline content.`);
-    }
-
-    if (oldScript.parentNode) {
-      oldScript.parentNode.insertBefore(newScript, oldScript.nextSibling); // Insert new after old
-      oldScript.parentNode.removeChild(oldScript); // Then remove old
-      console.log('[Terminal] Script #${index + 1} re-inserted and old one removed.');
-    } else {
-      container.appendChild(newScript);
-    }
-  });
-};
-
-// Watch for changes in terminalCustomHTML and execute scripts
-watch(terminalCustomHTML, (newHtmlContent, oldHtmlContent) => {
-  console.log(`[TerminalCustomHTML Watch sessionId=${props.sessionId}] Triggered. New HTML defined: ${!!newHtmlContent}, Old HTML defined: ${!!oldHtmlContent}. New === Old: ${newHtmlContent === oldHtmlContent}`);
-  // 仅当实际 HTML 字符串内容发生变化时才继续。
-  if (newHtmlContent === oldHtmlContent && oldHtmlContent !== undefined) { // Ensure initial undefined oldHtmlContent still proceeds if newHtmlContent exists
-    console.log(`[TerminalCustomHTML Watch sessionId=${props.sessionId}] HTML content is same as old and old was defined. Skipping script execution.`);
-    return;
-  }
-
-  // 始终在 nextTick 中操作，以确保 v-html 已更新 DOM
-  nextTick(() => {
-    const container = customHtmlLayerRef.value;
-    if (container) {
-      if (newHtmlContent) {
-        // console.log('[Terminal] terminalCustomHTML 内容已更改，正在为脚本处理新的 HTML 内容。'); // 保留原始的简单日志（注释掉）
-        executeScriptsInElement(container);
-      } else {
-        // console.log('[Terminal] terminalCustomHTML 内容已清除，脚本将不被处理。'); // 保留原始的简单日志（注释掉）
-      }
-    }
-  });
-}, { immediate: true });
-                         
-                         
-                       
-
 </script>
 
 <template>
   <div ref="terminalOuterWrapperRef" class="terminal-outer-wrapper">
-    <!-- 蒙版层 -->
-    <div
-      v-if="isTerminalBackgroundEnabled"
-      class="terminal-background-overlay"
-      :style="{ backgroundColor: `rgba(0, 0, 0, ${currentTerminalBackgroundOverlayOpacity})` }"
-    ></div>
-    <div
-      ref="customHtmlLayerRef"
-      v-if="isTerminalBackgroundEnabled && terminalCustomHTML"
-      class="terminal-custom-html-layer"
-      style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 1; pointer-events: none;"
-      v-html="terminalCustomHTML"
-    ></div>
     <!-- xterm 实际挂载点 -->
     <div ref="terminalRef" class="terminal-inner-container"></div>
   </div>
@@ -874,21 +730,11 @@ watch(terminalCustomHTML, (newHtmlContent, oldHtmlContent) => {
   position: relative;
 }
 
-.terminal-background-overlay {
-  position: absolute;
-  top: 0;
-  left: 0;
-  width: 100%;
-  height: 100%;
-  pointer-events: none; /* 允许鼠标事件穿透 */
-  z-index: 1; /* 在背景图之上 */
-}
-
 .terminal-inner-container {
   width: 100%;
   height: 100%;
-  position: relative; /* 使 z-index 生效 */
-  z-index: 2; /* 在蒙版之上 */
+  /* position: relative;  移除了 position relative */
+  /* z-index 调整或移除，因为背景层不再在此组件内 */
 }
 
 /* 文字描边和阴影样式 */
@@ -910,10 +756,9 @@ watch(terminalCustomHTML, (newHtmlContent, oldHtmlContent) => {
   text-shadow: var(--terminal-shadow);
 }
 
-/* 当最外层容器有背景图时，强制内部 xterm 视口和屏幕背景透明 */
-.terminal-outer-wrapper.has-terminal-background .terminal-inner-container :deep(.xterm-viewport),
-.terminal-outer-wrapper.has-terminal-background .terminal-inner-container :deep(.xterm-screen) {
-  background-color: transparent !important;
-}
+/*
+  移除以下样式，因为它依赖于本组件内部管理的 .has-terminal-background 类，
+  该逻辑已移至 LayoutRenderer.vue
+*/
 </style>