diff --git a/backend/src/routes/accounts.ts b/backend/src/routes/accounts.ts
index 93f8bad..636f73c 100644
--- a/backend/src/routes/accounts.ts
+++ b/backend/src/routes/accounts.ts
@@ -77,6 +77,11 @@ accounts.get('/', async (c) => {
     return c.json(response);
 });
 
+// 获取服务器当前时间 (用于时间校准)
+accounts.get('/server-time', (c) => {
+    return c.json({ success: true, time: Date.now() });
+});
+
 // 添加新账号
 accounts.post('/', async (c) => {
     const { service, category, account, secret, digits = 6, period = 30 } = await c.req.json();
diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index 183b9ce..6a9dea4 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -32,25 +32,3 @@ onBeforeUnmount(() => {
     <TheFooter />
   </div>
 </template>
-
-<style>
-body {
-  margin: 0;
-  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
-  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
-  min-height: 100vh;
-  -webkit-font-smoothing: antialiased;
-}
-.app-container {
-  display: flex;
-  flex-direction: column;
-  height: 100vh; /* 改为固定高度，以便内部滚动 */
-  overflow: hidden;
-}
-main {
-  flex: 1;
-  overflow: hidden; /* 防止 main 自身滚动，让子元素决定 */
-  display: flex;
-  flex-direction: column;
-}
-</style>
diff --git a/frontend/src/components/AccountList.vue b/frontend/src/components/AccountList.vue
index df5dc84..af2285c 100644
--- a/frontend/src/components/AccountList.vue
+++ b/frontend/src/components/AccountList.vue
@@ -16,7 +16,7 @@
         />
         
         <div class="batch-actions" v-if="selectedIds.length > 0" style="display: flex; align-items: center; gap: 10px;">
-          <span style="color: #606266; font-size: 14px;">已选择 {{ selectedIds.length }} 项</span>
+          <span class="batch-text">已选择 {{ selectedIds.length }} 项</span>
           <el-button type="danger" plain @click="handleBulkDelete" :loading="isBulkDeleting">
             <el-icon><Delete /></el-icon> 批量删除
           </el-button>
@@ -31,9 +31,9 @@
         <el-col :xs="24" :sm="12" :md="8" :lg="6" v-for="account in accounts" :key="account.id" style="margin-bottom: 20px;">
           <el-card class="account-card" :class="{ 'is-selected': selectedIds.includes(account.id) }" shadow="hover" @click="copyCode(account)">
             <div class="card-header">
-              <div class="service-info" style="display: flex; align-items: center; gap: 10px;">
+              <div class="service-info">
                 <el-checkbox :model-value="selectedIds.includes(account.id)" @change="toggleSelection(account.id)" @click.stop />
-                <h3 class="service-name">{{ account.service }}</h3>
+                <h3 class="service-name" :title="account.service">{{ account.service }}</h3>
                 <el-tag size="small" v-if="account.category" effect="light">{{ account.category }}</el-tag>
               </div>
               
@@ -55,7 +55,7 @@
               </el-dropdown>
             </div>
             
-            <p class="account-name" style="margin-left: 24px;">{{ account.account }}</p>
+            <p class="account-name">{{ account.account }}</p>
             
             <div class="code-display-area">
               <div class="code-left">
@@ -73,7 +73,7 @@
                   :color="account.color || '#67C23A'"
                 >
                   <template #default>
-                    <span class="timer-text-small">{{ account.remaining || 30 }}</span>
+                    <span class="timer-text">{{ account.remaining || 30 }}</span>
                   </template>
                 </el-progress>
               </div>
@@ -443,48 +443,4 @@ onMounted(() => {
 onUnmounted(() => {
   if (globalTimer) clearInterval(globalTimer)
 })
-</script>
-
-<style scoped>
-.account-card { border-radius: 12px; transition: all 0.3s ease; border: none; cursor: pointer; }
-.account-card:hover { transform: translateY(-5px); box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1) !important; }
-.card-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 10px; }
-.service-name { margin: 0 0 5px 0; font-size: 18px; color: #303133; }
-.account-name { color: #909399; font-size: 14px; margin: 0 0 10px 0; word-break: break-all; }
-.more-icon { cursor: pointer; color: #909399; padding: 5px; }
-.more-icon:hover { color: #409EFF; }
-.account-card.is-selected { border: 1px solid #409EFF; background-color: #f4f9ff; }
-
-.code-display-area { display: flex; justify-content: space-between; align-items: center; margin-top: 15px; padding-left: 24px; }
-.code-left { display: flex; flex-direction: column; justify-content: center; }
-.current-code { font-size: 24px; font-weight: bold; color: #409EFF; letter-spacing: 2px; line-height: 1; font-family: monospace; }
-.next-code { font-size: 16px; color: #909399; margin-top: 4px; font-family: monospace; }
-.timer-text-small { font-size: 12px; color: #606266; font-weight: bold; display: block; text-align: center; }
-:deep(.el-progress__text) { 
-  top: 0;
-  left: 0;
-  width: 100%;
-  height: 100%;
-  transform: none; /* 移除默认的偏移，由 Flex 接管 */
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  min-width:30px;
-}
-
-.qr-container { display: flex; flex-direction: column; align-items: center; text-align: center; }
-.qr-info { margin-bottom: 15px; }
-.qr-service { margin: 0 0 5px 0; font-size: 20px; color: #303133; }
-.qr-account { margin: 0; color: #909399; font-size: 14px; }
-.qr-image-wrapper { margin: 10px 0; padding: 10px; background: #fff; border-radius: 8px; border: 1px solid #EBEEF5; }
-.qr-code-img { display: block; width: 200px; height: 200px; }
-.qr-tip { font-size: 12px; color: #606266; margin: 10px 0 20px 0; }
-
-.secret-section { width: 100%; margin-bottom: 15px; }
-.secret-box { display: flex; align-items: center; justify-content: space-between; background: #f5f7fa; padding: 10px 15px; border-radius: 6px; border: 1px solid #e4e7ed; }
-.secret-text { font-family: monospace; font-size: 14px; color: #606266; letter-spacing: 1px; }
-.secret-actions { display: flex; gap: 15px; }
-.action-icon { cursor: pointer; font-size: 16px; color: #909399; transition: color 0.2s; }
-.action-icon:hover { color: #409EFF; }
-.uri-link-wrapper { margin-top: 5px; }
-</style>
\ No newline at end of file
+</script>
\ No newline at end of file
diff --git a/frontend/src/components/AddAccountManual.vue b/frontend/src/components/AddAccountManual.vue
index 677c32e..9567da8 100644
--- a/frontend/src/components/AddAccountManual.vue
+++ b/frontend/src/components/AddAccountManual.vue
@@ -87,14 +87,4 @@ const submitAddAccount = async () => {
     }
   })
 }
-</script>
-
-<style scoped>
-.tab-card-wrapper {
-  background: white;
-  padding: 40px;
-  border-radius: 12px;
-  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.05);
-  min-height: 400px;
-}
-</style>
\ No newline at end of file
+</script>
\ No newline at end of file
diff --git a/frontend/src/components/AddAccountScan.vue b/frontend/src/components/AddAccountScan.vue
index 6526031..4c28df4 100644
--- a/frontend/src/components/AddAccountScan.vue
+++ b/frontend/src/components/AddAccountScan.vue
@@ -4,7 +4,7 @@
       <h2 style="text-align: center; margin-bottom: 20px;">📷 扫码添加</h2>
       <div style="max-width: 600px; margin: 0 auto;">
         <div style="text-align: center; margin-bottom: 20px; margin-top: 10px;">
-          <p style="color: #909399;">请允许浏览器使用摄像头，或直接上传微信/系统截图。</p>
+          <p style="color: var(--el-text-color-secondary);">请允许浏览器使用摄像头，或直接上传微信/系统截图。</p>
         </div>
         <QrScanner @scan-success="handleScanSuccess" />
       </div>
@@ -57,14 +57,4 @@ const handleScanSuccess = async (uri) => {
     if (err !== 'cancel') console.error(err)
   }
 }
-</script>
-
-<style scoped>
-.tab-card-wrapper {
-  background: white;
-  padding: 40px;
-  border-radius: 12px;
-  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.05);
-  min-height: 400px;
-}
-</style>
\ No newline at end of file
+</script>
\ No newline at end of file
diff --git a/frontend/src/components/BackupSettings.vue b/frontend/src/components/BackupSettings.vue
index 9b8f816..42c7126 100644
--- a/frontend/src/components/BackupSettings.vue
+++ b/frontend/src/components/BackupSettings.vue
@@ -117,9 +117,9 @@
           </div>
           <div v-if="!(isEditing && hasExistingAutoPwd && configUseExistingAutoPwd)" style="width: 100%;">
             <el-input v-model="form.autoBackupPassword" type="password" show-password placeholder="输入加密密码" />
-            <div class="form-tip" style="font-size: 12px; color: #909399; margin-top: 5px;"><span style="color: #F56C6C;">*</span> 必填项，长度必须 &ge; 12 位。</div>
+            <div class="form-tip"><span style="color: #F56C6C;">*</span> 必填项，长度必须 &ge; 12 位。</div>
           </div>
-          <div v-else style="padding: 10px; background-color: #f0f9eb; border-radius: 4px; color: #67C23A; font-size: 13px; display: flex; align-items: center; gap: 8px; width: 100%;">
+          <div v-else class="success-tip">
             <el-icon><CircleCheck /></el-icon><span>系统将继续使用原有的自动备份密码。</span>
           </div>
         </el-form-item>
@@ -145,7 +145,7 @@
       <div v-if="!useAutoPassword">
         <el-input v-model="backupPassword" type="password" show-password placeholder="输入加密密码 (至少12位)" />
       </div>
-      <div v-else style="padding: 10px; background-color: #f0f9eb; border-radius: 4px; color: #67C23A; font-size: 13px; display: flex; align-items: center; gap: 8px;">
+      <div v-else class="success-tip">
         <el-icon><CircleCheck /></el-icon>
         <span>系统将使用您预设的自动备份密码进行加密。</span>
       </div>
@@ -398,14 +398,4 @@ const handleRestore = async () => {
 }
 
 onMounted(fetchProviders)
-</script>
-
-<style scoped>
-.header-actions { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
-.provider-card { height: 100%; }
-.card-header { display: flex; justify-content: space-between; align-items: center; }
-.provider-info { display: flex; align-items: center; }
-.provider-title { display: flex; align-items: center; gap: 8px; font-weight: bold; flex-wrap: wrap; }
-.status-text { font-size: 13px; color: #666; margin-bottom: 15px; }
-.action-buttons { display: flex; gap: 10px; }
-</style>
\ No newline at end of file
+</script>
\ No newline at end of file
diff --git a/frontend/src/components/DataBackup.vue b/frontend/src/components/DataBackup.vue
index 70fbd23..dd73043 100644
--- a/frontend/src/components/DataBackup.vue
+++ b/frontend/src/components/DataBackup.vue
@@ -3,7 +3,7 @@
     <div class="tab-card-wrapper">
       <div style="text-align: center; margin-bottom: 30px;">
         <h2>云端备份中心</h2>
-        <p style="color: #909399;">配置多个备份源（WebDAV, S3等），确保数据万无一失。</p>
+        <p style="color: var(--el-text-color-secondary);">配置多个备份源（WebDAV, S3等），确保数据万无一失。</p>
       </div>
       <BackupSettings @restore-success="$emit('success')" />
     </div>
@@ -14,14 +14,4 @@
 import BackupSettings from './BackupSettings.vue'
 
 const emit = defineEmits(['success'])
-</script>
-
-<style scoped>
-.tab-card-wrapper {
-  background: white;
-  padding: 40px;
-  border-radius: 12px;
-  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.05);
-  min-height: 400px;
-}
-</style>
\ No newline at end of file
+</script>
\ No newline at end of file
diff --git a/frontend/src/components/DataExport.vue b/frontend/src/components/DataExport.vue
index 271e2c6..20f9b0f 100644
--- a/frontend/src/components/DataExport.vue
+++ b/frontend/src/components/DataExport.vue
@@ -3,7 +3,7 @@
     <div class="tab-card-wrapper">
       <div style="text-align: center; margin-bottom: 30px;">
         <h2>数据导出</h2>
-        <p style="color: #909399;">选择您需要的导出格式。请注意，明文导出存在安全风险。</p>
+        <p style="color: var(--el-text-color-secondary);">选择您需要的导出格式。请注意，明文导出存在安全风险。</p>
       </div>
 
       <div style="max-width: 600px; margin: 0 auto;">
@@ -125,18 +125,4 @@ const executeExport = async () => {
     showWarningDialog.value = false
   } catch (error) {} finally { isExporting.value = false }
 }
-</script>
-
-<style scoped>
-.tab-card-wrapper {
-  background: white;
-  padding: 40px;
-  border-radius: 12px;
-  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.05);
-  min-height: 400px;
-}
-
-.export-options { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin-top: 20px; }
-.export-options .el-button { margin: 0; justify-content: flex-start; padding-left: 20px; height: auto; padding-top: 15px; padding-bottom: 15px; }
-@media (max-width: 768px) { .export-options { grid-template-columns: 1fr; } }
-</style>
\ No newline at end of file
+</script>
\ No newline at end of file
diff --git a/frontend/src/components/DataImport.vue b/frontend/src/components/DataImport.vue
index 7407aff..a981fce 100644
--- a/frontend/src/components/DataImport.vue
+++ b/frontend/src/components/DataImport.vue
@@ -3,7 +3,7 @@
     <div class="tab-card-wrapper">
       <div style="text-align: center; margin-bottom: 30px;">
         <h2>数据导入</h2>
-        <p style="color: #909399;">支持从各类 2FA 软件或本系统的备份文件中恢复数据。</p>
+        <p style="color: var(--el-text-color-secondary);">支持从各类 2FA 软件或本系统的备份文件中恢复数据。</p>
       </div>
 
       <div style="max-width: 600px; margin: 0 auto;" v-loading="isImporting && !showDecryptDialog" :element-loading-text="loadingText">
@@ -101,17 +101,4 @@ const submitImportData = async () => {
     }
   } catch (error) {} finally { isImporting.value = false }
 }
-</script>
-
-<style scoped>
-.tab-card-wrapper {
-  background: white;
-  padding: 40px;
-  border-radius: 12px;
-  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.05);
-  min-height: 400px;
-}
-.import-options { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin-top: 20px; }
-.import-options .el-button { margin: 0; justify-content: flex-start; padding-left: 20px; height: auto; padding-top: 15px; padding-bottom: 15px; }
-@media (max-width: 768px) { .import-options { grid-template-columns: 1fr; } }
-</style>
\ No newline at end of file
+</script>
\ No newline at end of file
diff --git a/frontend/src/components/TheFooter.vue b/frontend/src/components/TheFooter.vue
index b33efbe..b93180a 100644
--- a/frontend/src/components/TheFooter.vue
+++ b/frontend/src/components/TheFooter.vue
@@ -12,35 +12,4 @@
 
 <script setup>
 // 这里可以添加页脚需要的逻辑，例如版本号显示等
-</script>
-
-<style scoped>
-.global-footer {
-  width: 100%;
-  padding: 0.25rem 0;
-  background-color: #f8f9fa;
-  border-top: 1px solid #e9ecef;
-  text-align: center;
-  margin-top: auto;
-}
-
-.footer-content {
-  color: #6c757d;
-  font-size: 0.875rem;
-}
-
-.divider {
-  margin: 0 0.5rem;
-  color: #dee2e6;
-}
-
-a {
-  color: inherit;
-  text-decoration: none;
-  transition: color 0.2s;
-}
-
-a:hover {
-  color: #409EFF;
-}
-</style>
\ No newline at end of file
+</script>
\ No newline at end of file
diff --git a/frontend/src/components/TheHeader.vue b/frontend/src/components/TheHeader.vue
index 27cbc06..c342b19 100644
--- a/frontend/src/components/TheHeader.vue
+++ b/frontend/src/components/TheHeader.vue
@@ -2,7 +2,7 @@
   <header class="header">
     <div class="logo">
       <el-button v-if="layoutState.isMobile && route.path !== '/login'" link @click="layoutState.showMobileMenu = true" style="margin-right: 5px; padding: 0;">
-        <el-icon :size="24" color="#606266"><Menu /></el-icon>
+        <el-icon :size="24" class="menu-icon"><Menu /></el-icon>
       </el-button>
       <el-icon :size="24" color="#409EFC" style="margin-right: 10px;"><Lock /></el-icon>
       <h2>2FAuth</h2>
@@ -12,54 +12,16 @@
         <el-avatar :size="32" :src="userState.userInfo?.avatar_template" />
         <span class="username">{{ userState.userInfo?.username }}</span>
       </div>
-      <el-button type="danger" circle @click="handleLogout" title="退出登录">
-        <el-icon><SwitchButton /></el-icon>
-      </el-button>
     </div>
   </header>
 </template>
 
 <script setup>
 import { ref } from 'vue'
-import { useRouter, useRoute } from 'vue-router'
-import { Lock, SwitchButton, Menu } from '@element-plus/icons-vue'
-import { ElMessage } from 'element-plus'
+import { useRoute } from 'vue-router'
+import { Lock, Menu } from '@element-plus/icons-vue'
 import { layoutState } from '../states/layout'
 import { userState } from '../states/user'
 
-const router = useRouter()
 const route = useRoute()
-
-const handleLogout = () => {
-  userState.clearUserInfo()
-  router.push('/login')
-  ElMessage.success('已安全退出')
-}
-</script>
-
-<style scoped>
-.header {
-  background: white;
-  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.05);
-  display: flex;
-  justify-content: space-between;
-  align-items: center;
-  padding: 0 20px;
-  height: 60px;
-  flex-shrink: 0; /* 防止被压缩 */
-  z-index: 100;
-  position: relative;
-}
-
-.logo, .user-actions, .user-profile {
-  display: flex;
-  align-items: center;
-}
-
-.logo h2 { margin: 0; color: #303133; font-size: 20px; }
-.user-actions { gap: 20px; }
-.user-profile { gap: 10px; background: #f0f2f5; padding: 4px 15px 4px 4px; border-radius: 20px; }
-.username { font-weight: 600; color: #606266; font-size: 14px; }
-
-@media (max-width: 768px) { .header { padding: 0 15px; } .logo h2 { font-size: 18px; } }
-</style>
\ No newline at end of file
+</script>
\ No newline at end of file
diff --git a/frontend/src/components/ToolPassword.vue b/frontend/src/components/ToolPassword.vue
new file mode 100644
index 0000000..4d18d24
--- /dev/null
+++ b/frontend/src/components/ToolPassword.vue
@@ -0,0 +1,71 @@
+<template>
+  <div class="tool-pane">
+    <div class="result-box">
+      <div class="password-display">{{ password }}</div>
+      <el-button type="primary" link @click="copyPassword" title="复制">
+        <el-icon size="20"><CopyDocument /></el-icon>
+      </el-button>
+    </div>
+    
+    <div class="controls">
+      <div class="control-row">
+        <span class="label">长度: {{ length }}</span>
+        <el-slider v-model="length" :min="6" :max="64" @input="generate" style="flex: 1; margin: 0 15px;" />
+      </div>
+      
+      <div class="control-row checkboxes">
+        <el-checkbox v-model="useUpper" label="A-Z" @change="generate" />
+        <el-checkbox v-model="useLower" label="a-z" @change="generate" />
+        <el-checkbox v-model="useNumber" label="0-9" @change="generate" />
+        <el-checkbox v-model="useSymbol" label="#$@" @change="generate" />
+      </div>
+    </div>
+
+    <el-button type="primary" size="large" @click="generate" style="width: 100%; margin-top: 20px;">
+      <el-icon><Refresh /></el-icon> 重新生成
+    </el-button>
+  </div>
+</template>
+
+<script setup>
+import { ref, onMounted } from 'vue'
+import { ElMessage } from 'element-plus'
+import { CopyDocument, Refresh } from '@element-plus/icons-vue'
+
+const password = ref('')
+const length = ref(16)
+const useUpper = ref(true)
+const useLower = ref(true)
+const useNumber = ref(true)
+const useSymbol = ref(true)
+
+const generate = () => {
+  let chars = ''
+  if (useLower.value) chars += 'abcdefghijklmnopqrstuvwxyz'
+  if (useUpper.value) chars += 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+  if (useNumber.value) chars += '0123456789'
+  if (useSymbol.value) chars += '!@#$%^&*()_+-=[]{}|;:,.<>?'
+  
+  if (!chars) return (password.value = '')
+  
+  let res = ''
+  const array = new Uint32Array(length.value)
+  window.crypto.getRandomValues(array)
+  for (let i = 0; i < length.value; i++) {
+    res += chars[array[i] % chars.length]
+  }
+  password.value = res
+}
+
+const copyPassword = async () => {
+  if (!password.value) return
+  try {
+    await navigator.clipboard.writeText(password.value)
+    ElMessage.success('密码已复制')
+  } catch (e) {
+    ElMessage.error('复制失败')
+  }
+}
+
+onMounted(generate)
+</script>
\ No newline at end of file
diff --git a/frontend/src/components/ToolQrParser.vue b/frontend/src/components/ToolQrParser.vue
new file mode 100644
index 0000000..bdd9d02
--- /dev/null
+++ b/frontend/src/components/ToolQrParser.vue
@@ -0,0 +1,129 @@
+<template>
+  <div class="tool-pane">
+    <div class="qr-parser-container">
+      <el-radio-group v-model="parserMode" style="margin-bottom: 20px; width: 100%; display: flex; justify-content: center;">
+        <el-radio-button label="camera">摄像头扫描</el-radio-button>
+        <el-radio-button label="image">图片识别</el-radio-button>
+      </el-radio-group>
+
+      <!-- Camera Mode -->
+      <div v-if="parserMode === 'camera'" class="scan-area">
+        <div class="video-wrapper" v-show="isScanning">
+          <video ref="videoEl" playsinline muted style="width: 100%; border-radius: 8px; background: #000;"></video>
+        </div>
+        <div v-if="!isScanning" class="camera-placeholder" @click="toggleCamera">
+          <el-icon :size="48" color="#909399"><Camera /></el-icon>
+          <p>点击开启摄像头</p>
+        </div>
+        <el-button :type="isScanning ? 'danger' : 'primary'" @click="toggleCamera" style="margin-top: 15px; width: 100%;">
+          {{ isScanning ? '停止扫描' : '开启摄像头' }}
+        </el-button>
+      </div>
+
+      <!-- Image Mode -->
+      <div v-else class="upload-area">
+        <div class="image-preview" @click="triggerFileUpload">
+          <img v-if="previewImg" :src="previewImg" class="preview-img" />
+          <div v-else class="upload-placeholder">
+            <el-icon :size="48"><Upload /></el-icon>
+            <p>点击选择或拖拽二维码图片</p>
+          </div>
+        </div>
+        <input type="file" ref="fileInput" accept="image/*" style="display: none" @change="handleFileChange" />
+      </div>
+
+      <!-- Result -->
+      <div v-if="scanResult" class="result-section" style="margin-top: 20px;">
+        <el-divider content-position="left">解析结果</el-divider>
+        <el-input v-model="scanResult" type="textarea" :rows="3" readonly resize="none" />
+        <el-button type="success" plain style="width: 100%; margin-top: 10px;" @click="copyResult">
+          <el-icon><CopyDocument /></el-icon> 复制内容
+        </el-button>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup>
+import { ref, onUnmounted, watch } from 'vue'
+import { ElMessage } from 'element-plus'
+import { Camera, Upload, CopyDocument } from '@element-plus/icons-vue'
+import jsQR from 'jsqr'
+
+const parserMode = ref('camera')
+const scanResult = ref('')
+const isScanning = ref(false)
+const videoEl = ref(null)
+const fileInput = ref(null)
+const previewImg = ref('')
+let stream = null
+let rafId = null
+
+const toggleCamera = async () => {
+  if (isScanning.value) stopCamera()
+  else await startCamera()
+}
+
+const startCamera = async () => {
+  try {
+    stream = await navigator.mediaDevices.getUserMedia({ video: { facingMode: 'environment' } })
+    isScanning.value = true
+    setTimeout(() => {
+      if (videoEl.value) {
+        videoEl.value.srcObject = stream
+        videoEl.value.play()
+        requestAnimationFrame(tick)
+      }
+    }, 100)
+  } catch (err) { ElMessage.error('无法访问摄像头，请检查权限') }
+}
+
+const stopCamera = () => {
+  isScanning.value = false
+  if (stream) { stream.getTracks().forEach(track => track.stop()); stream = null }
+  if (rafId) { cancelAnimationFrame(rafId); rafId = null }
+}
+
+const tick = () => {
+  if (!isScanning.value || !videoEl.value) return
+  if (videoEl.value.readyState === videoEl.value.HAVE_ENOUGH_DATA) {
+    const canvas = document.createElement('canvas')
+    canvas.width = videoEl.value.videoWidth
+    canvas.height = videoEl.value.videoHeight
+    const ctx = canvas.getContext('2d')
+    ctx.drawImage(videoEl.value, 0, 0, canvas.width, canvas.height)
+    const imageData = ctx.getImageData(0, 0, canvas.width, canvas.height)
+    const code = jsQR(imageData.data, imageData.width, imageData.height, { inversionAttempts: 'dontInvert' })
+    if (code) {
+      scanResult.value = code.data
+      ElMessage.success('二维码识别成功')
+      stopCamera()
+      return
+    }
+  }
+  rafId = requestAnimationFrame(tick)
+}
+
+const triggerFileUpload = () => fileInput.value.click()
+const handleFileChange = (e) => {
+  const file = e.target.files[0]; if (!file) return
+  const reader = new FileReader()
+  reader.onload = (ev) => {
+    previewImg.value = ev.target.result
+    const img = new Image(); img.onload = () => {
+      const canvas = document.createElement('canvas'); canvas.width = img.width; canvas.height = img.height
+      const ctx = canvas.getContext('2d'); ctx.drawImage(img, 0, 0)
+      const imageData = ctx.getImageData(0, 0, canvas.width, canvas.height)
+      const code = jsQR(imageData.data, imageData.width, imageData.height)
+      if (code) { scanResult.value = code.data; ElMessage.success('图片识别成功') } else { ElMessage.warning('未识别到二维码') }
+    }; img.src = ev.target.result
+  }; reader.readAsDataURL(file); e.target.value = ''
+}
+
+const copyResult = async () => {
+  if (!scanResult.value) return
+  try { await navigator.clipboard.writeText(scanResult.value); ElMessage.success('内容已复制') } catch (e) {}
+}
+
+onUnmounted(stopCamera)
+</script>
\ No newline at end of file
diff --git a/frontend/src/components/ToolTimeSync.vue b/frontend/src/components/ToolTimeSync.vue
new file mode 100644
index 0000000..90b6321
--- /dev/null
+++ b/frontend/src/components/ToolTimeSync.vue
@@ -0,0 +1,81 @@
+<template>
+  <div class="tool-pane">
+    <div class="time-sync-container">
+      <!-- 状态横幅 -->
+      <el-alert
+        v-if="syncStatus"
+        :title="syncStatus.title"
+        :type="syncStatus.type"
+        :description="syncStatus.desc"
+        show-icon
+        :closable="false"
+        style="margin-bottom: 20px;"
+      />
+
+      <!-- 时钟仪表盘 -->
+      <div class="clocks-wrapper">
+        <div class="clock-card local">
+          <div class="clock-label">📱 本地设备时间</div>
+          <div class="clock-time">{{ formatTime(localTime) }}</div>
+        </div>
+        <div class="clock-card server">
+          <div class="clock-label">☁️ 服务器时间 (估算)</div>
+          <div class="clock-time">{{ formatTime(serverTime) }}</div>
+        </div>
+      </div>
+
+      <!-- 详细数据 -->
+      <div class="sync-details">
+        <p>时间偏差: <strong>{{ offset !== null ? `${offset > 0 ? '+' : ''}${offset} ms` : '--' }}</strong></p>
+        <p>网络延迟: <span>{{ rtt !== null ? `${rtt} ms` : '--' }}</span></p>
+      </div>
+
+      <el-button type="primary" size="large" :loading="isSyncing" @click="syncTime" style="width: 100%; margin-top: 20px;">
+        <el-icon><Refresh /></el-icon> 立即检测
+      </el-button>
+    </div>
+  </div>
+</template>
+
+<script setup>
+import { ref, computed, onMounted, onUnmounted } from 'vue'
+import { ElMessage } from 'element-plus'
+import { Refresh } from '@element-plus/icons-vue'
+import { request } from '../utils/request'
+
+const localTime = ref(Date.now())
+const offset = ref(null)
+const rtt = ref(null)
+const isSyncing = ref(false)
+let clockTimer = null
+
+const serverTime = computed(() => localTime.value + (offset.value || 0))
+const formatTime = (ts) => new Date(ts).toLocaleTimeString()
+
+const syncStatus = computed(() => {
+  if (offset.value === null) return null
+  const abs = Math.abs(offset.value)
+  if (abs < 2000) return { title: '时间同步正常', type: 'success', desc: '本地时间与服务器误差极小，不影响 2FA 验证。' }
+  if (abs < 30000) return { title: '存在微小偏差', type: 'warning', desc: '建议校准本地时间，但通常仍可使用。' }
+  return { title: '时间偏差过大', type: 'error', desc: '严重偏差！2FA 验证码将失效，请务必校准设备时间。' }
+})
+
+const syncTime = async () => {
+  isSyncing.value = true
+  const start = Date.now()
+  try {
+    const res = await request('/api/accounts/server-time')
+    const end = Date.now()
+    if (res.success) {
+      const serverTs = res.time
+      rtt.value = end - start
+      const estimatedServerTime = serverTs + (rtt.value / 2)
+      offset.value = Math.round(estimatedServerTime - end)
+      ElMessage.success(`校准完成，偏差 ${offset.value}ms`)
+    }
+  } catch (e) { ElMessage.error('无法连接服务器') } finally { isSyncing.value = false }
+}
+
+onMounted(() => { clockTimer = setInterval(() => { localTime.value = Date.now() }, 1000); syncTime() })
+onUnmounted(() => { if (clockTimer) clearInterval(clockTimer) })
+</script>
\ No newline at end of file
diff --git a/frontend/src/components/ToolTotpSecret.vue b/frontend/src/components/ToolTotpSecret.vue
new file mode 100644
index 0000000..1d76c4a
--- /dev/null
+++ b/frontend/src/components/ToolTotpSecret.vue
@@ -0,0 +1,472 @@
+<template>
+  <div class="tool-pane">
+    <div class="totp-layout">
+      <!-- Bottom: Configuration -->
+      <div class="config-side">
+        <!-- 1. Secret Input (Tabs) -->
+        <div class="config-section">
+          <div class="section-header">
+            <h3 class="section-title">密钥配置</h3>
+            <el-button link type="primary" @click="triggerImportQr">
+              <el-icon><Camera /></el-icon> 识别二维码导入
+            </el-button>
+          </div>
+          
+          <el-tabs v-model="activeTab" type="border-card" class="secret-tabs">
+            <el-tab-pane label="Base32" name="base32">
+              <el-input 
+                v-model="secretBase32" 
+                @input="handleBase32Input" 
+                placeholder="JBSWY3DP..." 
+                clearable
+                type="textarea"
+                :rows="3"
+              />
+              <div class="tab-actions">
+                <el-button size="small" @click="refreshBase32"><el-icon><Refresh /></el-icon> 随机生成</el-button>
+                <el-button size="small" @click="copy(secretBase32)"><el-icon><CopyDocument /></el-icon> 复制</el-button>
+              </div>
+            </el-tab-pane>
+            
+            <el-tab-pane label="Hex (十六进制)" name="hex">
+              <el-input 
+                v-model="secretHex" 
+                @input="handleHexInput" 
+                placeholder="48656c6c6f..." 
+                clearable
+                type="textarea"
+                :rows="3"
+              />
+              <div class="tab-actions">
+                <el-button size="small" @click="refreshHex"><el-icon><Refresh /></el-icon> 随机生成</el-button>
+                <el-button size="small" @click="copy(secretHex)"><el-icon><CopyDocument /></el-icon> 复制</el-button>
+              </div>
+            </el-tab-pane>
+            
+            <el-tab-pane label="ASCII" name="ascii">
+              <el-input 
+                v-model="secretAscii" 
+                @input="handleAsciiInput" 
+                placeholder="Hello..." 
+                clearable
+                type="textarea"
+                :rows="3"
+              />
+              <div class="tab-actions">
+                <el-button size="small" @click="refreshAscii"><el-icon><Refresh /></el-icon> 随机生成</el-button>
+                <el-button size="small" @click="copy(secretAscii)"><el-icon><CopyDocument /></el-icon> 复制</el-button>
+              </div>
+            </el-tab-pane>
+          </el-tabs>
+        </div>
+
+        <!-- 2. Metadata -->
+        <div class="config-section">
+          <h3 class="section-title">基础信息</h3>
+          <div class="meta-row">
+            <el-input v-model="issuer" @input="updateUri">
+              <template #prefix><span class="input-label">服务商</span></template>
+            </el-input>
+            <el-input v-model="account" @input="updateUri">
+              <template #prefix><span class="input-label">账号标识</span></template>
+            </el-input>
+          </div>
+        </div>
+
+        <!-- 3. Result Preview -->
+        <div class="config-section">
+          <div class="section-header">
+            <h3 class="section-title">结果预览</h3>
+            <el-button link type="primary" @click="downloadQrCode" :disabled="!qrCodeUrl">
+              <el-icon><Download /></el-icon> 保存二维码
+            </el-button>
+          </div>
+          <div class="preview-top-section">
+            <div class="qr-wrapper" v-loading="!qrCodeUrl">
+              <img v-if="qrCodeUrl" :src="qrCodeUrl" alt="QR Code" class="qr-img" />
+              <el-empty v-else description="配置参数以生成预览" :image-size="100" />
+            </div>
+            <div class="result-card">
+              <div class="totp-code" :class="{ 'blur': !currentCode }">{{ currentCode || '------' }}</div>
+              <div class="totp-timer" :class="{ 'urgent': remaining < 5 }">
+                <el-icon><Timer /></el-icon> {{ remaining }}s 后刷新
+              </div>
+              <el-button type="primary" plain size="small" @click="copy(currentCode)" :disabled="!currentCode" style="margin-top: 10px;">
+                <el-icon><CopyDocument /></el-icon> 复制验证码
+              </el-button>
+            </div>
+          </div>
+          <div class="uri-box" v-if="qrCodeUrl">
+            <div class="uri-text">{{ currentUri }}</div>
+            <el-button link type="primary" @click="copy(currentUri)"><el-icon><CopyDocument /></el-icon></el-button>
+          </div>
+        </div>
+
+        <!-- 4. Advanced Settings -->
+        <div class="config-section">
+          <el-collapse>
+            <el-collapse-item title="高级设置 (算法/位数/步长)" name="1">
+              <div class="advanced-row">
+                <el-select v-model="algorithm" @change="updateAll('settings')" placeholder="算法" style="flex: 1">
+                  <el-option label="SHA-1 (默认)" value="SHA-1" />
+                  <el-option label="SHA-256" value="SHA-256" />
+                  <el-option label="SHA-512" value="SHA-512" />
+                </el-select>
+                <el-select v-model="digits" @change="updateAll('settings')" placeholder="位数" style="width: 100px">
+                  <el-option label="6 位" :value="6" />
+                  <el-option label="8 位" :value="8" />
+                </el-select>
+                <el-select v-model="period" @change="updateAll('settings')" placeholder="周期" style="width: 100px">
+                  <el-option label="30 秒" :value="30" />
+                  <el-option label="60 秒" :value="60" />
+                </el-select>
+              </div>
+            </el-collapse-item>
+          </el-collapse>
+        </div>
+
+        <!-- 5. Time Offset -->
+        <div class="config-section">
+          <div class="label-row">
+            <span class="label-text">时间偏移 (Time Travel): {{ timeOffset > 0 ? '+' : '' }}{{ timeOffset }}s</span>
+            <el-button link type="primary" @click="adjustTime(0, true)" size="small">重置</el-button>
+          </div>
+          <el-button-group style="width: 100%; display: flex;">
+            <el-button @click="adjustTime(-period)" style="flex:1" size="small">上个周期</el-button>
+            <el-button @click="adjustTime(period)" style="flex:1" size="small">下个周期</el-button>
+          </el-button-group>
+        </div>
+
+        <!-- Save Button -->
+        <div class="config-section" style="margin-top: 20px;">
+          <el-button type="success" size="large" @click="saveToAccount" style="width: 100%;" :loading="isSaving">
+            <el-icon><CircleCheck /></el-icon> 保存到我的账户
+          </el-button>
+        </div>
+      </div>
+    </div>
+    <input type="file" ref="qrFileInput" accept="image/*" style="display: none" @change="handleQrFileChange" />
+  </div>
+</template>
+
+<script setup>
+import { ref, onMounted, onUnmounted } from 'vue'
+import { ElMessage } from 'element-plus'
+import { CopyDocument, Refresh, Timer, Camera, CircleCheck, Download } from '@element-plus/icons-vue'
+import QRCode from 'qrcode'
+import jsQR from 'jsqr'
+import { request } from '../utils/request'
+
+// --- State ---
+const activeTab = ref('base32')
+const secretBase32 = ref('')
+const secretHex = ref('')
+const secretAscii = ref('')
+
+// Metadata & Settings
+const issuer = ref('2FAuth-Tool')
+const account = ref('TestUser')
+const algorithm = ref('SHA-1')
+const digits = ref(6)
+const period = ref(30)
+const timeOffset = ref(0)
+
+const qrCodeUrl = ref('')
+const currentUri = ref('')
+const currentCode = ref('')
+const remaining = ref(30)
+const isSaving = ref(false)
+const qrFileInput = ref(null)
+let timer = null
+
+// --- Base32 Logic ---
+const alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567'
+
+const base32Encode = (buffer) => {
+  let bits = 0, value = 0, output = ''
+  for (let i = 0; i < buffer.length; i++) {
+    value = (value << 8) | buffer[i]
+    bits += 8
+    while (bits >= 5) {
+      output += alphabet[(value >>> (bits - 5)) & 31]
+      bits -= 5
+    }
+  }
+  if (bits > 0) output += alphabet[(value << (5 - bits)) & 31]
+  return output
+}
+
+const base32Decode = (input) => {
+  let bits = 0, value = 0
+  const buffer = []
+  const cleaned = input.toUpperCase().replace(/=+$/, '').replace(/[^A-Z2-7]/g, '')
+  for (let i = 0; i < cleaned.length; i++) {
+    const val = alphabet.indexOf(cleaned[i])
+    value = (value << 5) | val
+    bits += 5
+    while (bits >= 8) {
+      buffer.push((value >>> (bits - 8)) & 255)
+      bits -= 8
+    }
+  }
+  return new Uint8Array(buffer)
+}
+
+// --- Hex Logic ---
+const toHex = (buffer) => {
+  return Array.from(buffer).map(b => b.toString(16).padStart(2, '0')).join('')
+}
+
+const fromHex = (hexString) => {
+  const hex = hexString.replace(/[^0-9a-fA-F]/g, '')
+  if (hex.length % 2 !== 0) return new Uint8Array(0)
+  const bytes = new Uint8Array(hex.length / 2)
+  for (let i = 0; i < hex.length; i += 2) bytes[i / 2] = parseInt(hex.substr(i, 2), 16)
+  return bytes
+}
+
+// --- ASCII Logic ---
+const toAscii = (buffer) => {
+  return String.fromCharCode.apply(null, buffer)
+}
+
+const fromAscii = (str) => {
+  const buffer = new Uint8Array(str.length)
+  for (let i = 0; i < str.length; i++) {
+    buffer[i] = str.charCodeAt(i)
+  }
+  return buffer
+}
+
+// --- Handlers ---
+const updateAll = async (sourceType) => {
+  try {
+    // 1. Sync Inputs
+    if (sourceType === 'base32') {
+      const bytes = base32Decode(secretBase32.value)
+      secretHex.value = toHex(bytes)
+      secretAscii.value = toAscii(bytes)
+    } else if (sourceType === 'hex') {
+      const bytes = fromHex(secretHex.value)
+      if (bytes.length > 0) secretBase32.value = base32Encode(bytes)
+      secretAscii.value = toAscii(bytes)
+    } else if (sourceType === 'ascii') {
+      const bytes = fromAscii(secretAscii.value)
+      secretBase32.value = base32Encode(bytes)
+      secretHex.value = toHex(bytes)
+    }
+
+    // 2. Generate QR
+    if (secretBase32.value) {
+      const label = encodeURIComponent(`${issuer.value}:${account.value}`)
+      const algoParam = algorithm.value.replace('-', '') // SHA-1 -> SHA1
+      const uri = `otpauth://totp/${label}?secret=${secretBase32.value}&issuer=${encodeURIComponent(issuer.value)}&algorithm=${algoParam}&period=${period.value}&digits=${digits.value}`
+      currentUri.value = uri
+      qrCodeUrl.value = await QRCode.toDataURL(uri, { width: 200, margin: 1 })
+    } else {
+      qrCodeUrl.value = ''
+      currentUri.value = ''
+      currentCode.value = ''
+    }
+
+    // 3. Update TOTP immediately
+    calcTotp()
+  } catch (e) {
+    console.error(e)
+    // Ignore decoding errors during typing
+  }
+}
+
+const handleBase32Input = () => updateAll('base32')
+const handleHexInput = () => updateAll('hex')
+const handleAsciiInput = () => updateAll('ascii')
+const updateUri = () => updateAll('settings')
+
+const refreshBase32 = () => {
+  // Generate 20 random bytes (160 bits) - Standard high security
+  const array = new Uint8Array(20)
+  window.crypto.getRandomValues(array)
+  secretBase32.value = base32Encode(array)
+  updateAll('base32')
+  ElMessage.success('已生成新的随机密钥')
+}
+
+const refreshHex = () => {
+  // Generate 20 random bytes
+  const array = new Uint8Array(20)
+  window.crypto.getRandomValues(array)
+  secretHex.value = toHex(array)
+  updateAll('hex')
+  ElMessage.success('已生成新的 Hex 密钥')
+}
+
+const refreshAscii = () => {
+  const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*()'
+  let result = ''
+  const array = new Uint32Array(20)
+  window.crypto.getRandomValues(array)
+  for (let i = 0; i < 20; i++) result += chars[array[i] % chars.length]
+  secretAscii.value = result
+  updateAll('ascii')
+  ElMessage.success('已生成随机 ASCII 密钥')
+}
+
+// --- TOTP Calculation ---
+const calcTotp = async () => {
+  if (!secretBase32.value) return
+  
+  const p = period.value
+  const now = (Date.now() / 1000) + timeOffset.value
+  const epoch = Math.floor(now / p)
+  remaining.value = Math.ceil(p - (now % p))
+
+  try {
+    const keyBytes = base32Decode(secretBase32.value)
+    if (keyBytes.length === 0) return
+
+    const timeBuffer = new ArrayBuffer(8)
+    new DataView(timeBuffer).setBigUint64(0, BigInt(epoch), false)
+
+    const key = await window.crypto.subtle.importKey('raw', keyBytes, { name: 'HMAC', hash: algorithm.value }, false, ['sign'])
+    const signature = await window.crypto.subtle.sign('HMAC', key, timeBuffer)
+    
+    const view = new DataView(signature)
+    const offset = view.getUint8(19) & 0xf
+    const binary = ((view.getUint8(offset) & 0x7f) << 24) |
+                   ((view.getUint8(offset + 1) & 0xff) << 16) |
+                   ((view.getUint8(offset + 2) & 0xff) << 8) |
+                   (view.getUint8(offset + 3) & 0xff)
+    
+    const mod = Math.pow(10, digits.value)
+    currentCode.value = (binary % mod).toString().padStart(digits.value, '0')
+  } catch (e) {
+    currentCode.value = 'ERROR'
+  }
+}
+
+// --- Time Travel ---
+const adjustTime = (delta, reset = false) => {
+  if (reset) timeOffset.value = 0
+  else timeOffset.value += delta
+  calcTotp()
+}
+
+// --- Import QR ---
+const triggerImportQr = () => qrFileInput.value.click()
+
+const handleQrFileChange = (e) => {
+  const file = e.target.files[0]
+  if (!file) return
+  
+  const reader = new FileReader()
+  reader.onload = (ev) => {
+    const img = new Image()
+    img.onload = () => {
+      const canvas = document.createElement('canvas')
+      canvas.width = img.width
+      canvas.height = img.height
+      const ctx = canvas.getContext('2d')
+      ctx.drawImage(img, 0, 0)
+      const imageData = ctx.getImageData(0, 0, canvas.width, canvas.height)
+      const code = jsQR(imageData.data, imageData.width, imageData.height)
+      
+      if (code) {
+        parseOtpUri(code.data)
+        ElMessage.success('二维码解析成功')
+      } else {
+        ElMessage.warning('未识别到二维码')
+      }
+    }
+    img.src = ev.target.result
+  }
+  reader.readAsDataURL(file)
+  e.target.value = ''
+}
+
+const parseOtpUri = (uri) => {
+  try {
+    if (!uri.startsWith('otpauth://')) return
+    const url = new URL(uri)
+    const params = url.searchParams
+    
+    if (params.has('secret')) {
+      secretBase32.value = params.get('secret')
+      updateAll('base32')
+    }
+    
+    if (params.has('issuer')) issuer.value = params.get('issuer')
+    if (params.has('digits')) digits.value = parseInt(params.get('digits'))
+    if (params.has('period')) period.value = parseInt(params.get('period'))
+    if (params.has('algorithm')) {
+      const algo = params.get('algorithm').toUpperCase()
+      if (algo === 'SHA1') algorithm.value = 'SHA-1'
+      else if (algo === 'SHA256') algorithm.value = 'SHA-256'
+      else if (algo === 'SHA512') algorithm.value = 'SHA-512'
+    }
+    
+    // Parse Label
+    const label = decodeURIComponent(url.pathname.replace(/^\//, ''))
+    if (label.includes(':')) {
+      const parts = label.split(':')
+      if (!params.has('issuer')) issuer.value = parts[0]
+      account.value = parts[1]
+    } else {
+      account.value = label
+    }
+    
+    updateAll('settings')
+  } catch (e) {
+    console.error('URI Parse Error', e)
+  }
+}
+
+// --- Save to Account ---
+const saveToAccount = async () => {
+  if (!secretBase32.value) return ElMessage.warning('密钥不能为空')
+  if (!issuer.value || !account.value) return ElMessage.warning('请填写服务商和账号')
+  
+  isSaving.value = true
+  try {
+    const res = await request('/api/accounts', {
+      method: 'POST',
+      body: JSON.stringify({
+        service: issuer.value,
+        account: account.value,
+        secret: secretBase32.value,
+        digits: digits.value,
+        period: period.value,
+        category: '工具箱添加'
+      })
+    })
+    if (res.success) {
+      ElMessage.success('已保存到我的账户')
+    }
+  } catch (e) {
+    // Error handled by request
+  } finally {
+    isSaving.value = false
+  }
+}
+
+const downloadQrCode = () => {
+  if (!qrCodeUrl.value) return
+  const a = document.createElement('a')
+  a.href = qrCodeUrl.value
+  a.download = `2fa-qr-${account.value || 'code'}.png`
+  document.body.appendChild(a)
+  a.click()
+  document.body.removeChild(a)
+}
+
+const copy = async (text) => {
+  if (!text) return
+  try { await navigator.clipboard.writeText(text); ElMessage.success('复制成功') } catch (e) {}
+}
+
+onMounted(() => {
+  refreshBase32() // Init with a random key
+  timer = setInterval(calcTotp, 1000)
+})
+
+onUnmounted(() => { if (timer) clearInterval(timer) })
+</script>
\ No newline at end of file
diff --git a/frontend/src/components/UtilityTools.vue b/frontend/src/components/UtilityTools.vue
new file mode 100644
index 0000000..7c7b119
--- /dev/null
+++ b/frontend/src/components/UtilityTools.vue
@@ -0,0 +1,102 @@
+<template>
+  <div class="tools-wrapper">
+    <div class="tab-card-wrapper">
+      <div class="tools-header">
+        <el-button v-if="currentTool" link @click="currentTool = null" class="back-btn">
+          <el-icon><ArrowLeft /></el-icon> 返回
+        </el-button>
+        <h2>{{ currentTool ? getToolTitle(currentTool) : '🛠️ 实用工具箱' }}</h2>
+      </div>
+
+      <!-- 工具列表 (卡片视图) -->
+      <div v-if="!currentTool" class="tools-grid">
+        <el-card 
+          v-for="tool in tools" 
+          :key="tool.id" 
+          shadow="hover" 
+          class="tool-card" 
+          @click="currentTool = tool.id"
+        >
+          <div class="tool-card-content">
+            <div class="icon-wrapper" :style="{ backgroundColor: tool.bgColor }">
+              <el-icon :size="32" :color="tool.iconColor"><component :is="tool.icon" /></el-icon>
+            </div>
+            <div class="text-info">
+              <h3>{{ tool.title }}</h3>
+              <p>{{ tool.desc }}</p>
+            </div>
+          </div>
+        </el-card>
+      </div>
+
+      <!-- 具体工具内容 -->
+      <div v-else class="tool-container">
+        
+        <!-- 动态组件加载 -->
+        <component :is="activeComponent" />
+
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup>
+import { ref, computed } from 'vue'
+import { Key, ArrowLeft, Timer, Lock, Camera } from '@element-plus/icons-vue'
+import ToolPassword from './ToolPassword.vue'
+import ToolTimeSync from './ToolTimeSync.vue'
+import ToolQrParser from './ToolQrParser.vue'
+import ToolTotpSecret from './ToolTotpSecret.vue'
+
+const currentTool = ref(null)
+
+const tools = [
+  { 
+    id: 'totp-secret', 
+    title: 'TOTP 密钥工具', 
+    desc: '随机生成密钥，支持 Base32 格式转换与校验', 
+    icon: Lock, 
+    iconColor: '#67C23A',
+    bgColor: 'var(--el-color-success-light-9)'
+  },
+  { 
+    id: 'password', 
+    title: '密码生成器', 
+    desc: '生成高强度随机密码，支持自定义长度和字符类型', 
+    icon: Key, 
+    iconColor: '#409EFF',
+    bgColor: 'var(--el-color-primary-light-9)'
+  },
+  {
+    id: 'time-sync',
+    title: '时间校准器',
+    desc: '精准检测本地时间与服务器时间的偏差',
+    icon: Timer,
+    iconColor: '#E6A23C',
+    bgColor: 'var(--el-color-warning-light-9)'
+  },
+  {
+    id: 'qr-parser',
+    title: '二维码解析器',
+    desc: '识别图片中的二维码内容，提取 OTP 链接',
+    icon: Camera,
+    iconColor: '#F56C6C',
+    bgColor: 'var(--el-color-danger-light-9)'
+  }
+]
+
+const getToolTitle = (id) => {
+  const t = tools.find(t => t.id === id)
+  return t ? t.title : '工具'
+}
+
+const activeComponent = computed(() => {
+  switch (currentTool.value) {
+    case 'password': return ToolPassword
+    case 'time-sync': return ToolTimeSync
+    case 'qr-parser': return ToolQrParser
+    case 'totp-secret': return ToolTotpSecret
+    default: return null
+  }
+})
+</script>
diff --git a/frontend/src/dark.css b/frontend/src/dark.css
new file mode 100644
index 0000000..afdff2a
--- /dev/null
+++ b/frontend/src/dark.css
@@ -0,0 +1,17 @@
+/* =========================================
+   深色模式变量配置 (Dark Mode Configuration)
+   ========================================= */
+
+html.dark {
+  /* 玻璃拟态卡片 */
+  --glass-card-bg: rgba(30, 30, 30, 0.6);
+  --glass-card-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
+
+  /* GitHub 按钮 (深色背景下使用纯黑+边框) */
+  --github-btn-bg: #000000;
+  --github-btn-border: var(--el-border-color-light);
+
+  /* 状态色块 */
+  --success-tip-bg: var(--el-fill-color-light);
+  --account-selected-bg: rgba(64, 158, 255, 0.15);
+}
\ No newline at end of file
diff --git a/frontend/src/main.css b/frontend/src/main.css
new file mode 100644
index 0000000..5368914
--- /dev/null
+++ b/frontend/src/main.css
@@ -0,0 +1,653 @@
+/* =========================================
+   0. 强制同步修复 (Force Sync)
+   ========================================= */
+/* 核心修复：强制禁用所有元素的过渡动画，确保深浅色切换瞬间完成，消除不同步感 */
+*, *::before, *::after {
+  transition: none !important;
+}
+
+/* =========================================
+   0.1 全局语义化变量 (Design Tokens)
+   ========================================= */
+:root {
+  /* 玻璃拟态卡片 (登录/加载) */
+  --glass-card-bg: rgba(255, 255, 255, 0.95);
+  --glass-card-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
+
+  /* GitHub 按钮 */
+  --github-btn-bg: #24292e;
+  --github-btn-border: #24292e;
+
+  /* 状态色块 */
+  --success-tip-bg: var(--el-color-success-light-9);
+  --account-selected-bg: var(--el-color-primary-light-9);
+}
+
+/* =========================================
+   1. 全局基础样式 (Global Reset & Base)
+   ========================================= */
+html, body, #app {
+  height: 100%;
+  margin: 0;
+  padding: 0;
+  background-color: var(--el-bg-color-page);
+  color: var(--el-text-color-primary);
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
+}
+
+a {
+  color: inherit;
+  text-decoration: none;
+  transition: color 0.2s;
+}
+
+a:hover {
+  color: #409EFF;
+}
+
+/* 滚动条优化 */
+::-webkit-scrollbar {
+  width: 8px;
+  height: 8px;
+}
+::-webkit-scrollbar-track {
+  background: transparent;
+}
+::-webkit-scrollbar-thumb {
+  background: var(--el-border-color);
+  border-radius: 4px;
+}
+::-webkit-scrollbar-thumb:hover {
+  background: var(--el-text-color-secondary);
+}
+
+/* 通用组件样式 */
+.tab-card-wrapper {
+  background: var(--el-bg-color);
+  padding: 40px;
+  border-radius: 12px;
+  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.05);
+  min-height: 400px;
+}
+
+/* =========================================
+   2. 布局组件 (Layout)
+   ========================================= */
+/* App.vue */
+.app-container {
+  display: flex;
+  flex-direction: column;
+  height: 100vh;
+  overflow: hidden;
+}
+main {
+  flex: 1;
+  overflow: hidden;
+  display: flex;
+  flex-direction: column;
+}
+
+/* TheHeader.vue */
+.header {
+  background: var(--el-bg-color);
+  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.05);
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 0 20px;
+  height: 60px;
+  flex-shrink: 0;
+  z-index: 100;
+  position: relative;
+  border-bottom: 1px solid var(--el-border-color-light);
+}
+.logo, .user-actions, .user-profile { display: flex; align-items: center; }
+.logo h2 { margin: 0; color: var(--el-text-color-primary); font-size: 20px; }
+.user-actions { gap: 20px; }
+.user-profile { gap: 10px; background: var(--el-fill-color-light); padding: 4px 15px 4px 4px; border-radius: 20px; }
+.username { font-weight: 600; color: var(--el-text-color-regular); font-size: 14px; }
+.menu-icon { color: var(--el-text-color-regular); }
+@media (max-width: 768px) { .header { padding: 0 15px; } .logo h2 { font-size: 18px; } }
+
+/* TheFooter.vue */
+.global-footer {
+  width: 100%;
+  padding: 0.25rem 0;
+  background-color: var(--el-bg-color);
+  border-top: 1px solid var(--el-border-color-light);
+  text-align: center;
+  margin-top: auto;
+}
+.footer-content { color: var(--el-text-color-secondary); font-size: 0.875rem; }
+.divider { margin: 0 0.5rem; color: var(--el-border-color); }
+
+/* Home.vue */
+.home-container { height: 100%; background-color: var(--el-bg-color-page); }
+.main-body { height: 100%; display: flex; overflow: hidden; }
+.left-aside { background: var(--el-bg-color); border-right: 1px solid var(--el-border-color-light); display: flex; flex-direction: column; }
+.side-menu { border-right: none; padding-top: 10px; flex: 1; }
+.main-content { padding: 30px 20px; width: 100%; background-color: var(--el-bg-color-page); overflow-y: auto; }
+.sidebar-footer { padding: 20px; text-align: center; display: flex; justify-content: center; gap: 10px; }
+.drawer-content { height: 100%; display: flex; flex-direction: column; }
+
+/* =========================================
+   3. 页面/功能组件 (Pages & Features)
+   ========================================= */
+
+/* Login.vue */
+.login-container {
+  display: flex; justify-content: center; align-items: center; height: 100%;
+  background: transparent; position: relative;
+}
+.login-card {
+  width: 100%; max-width: 420px; border-radius: 16px;
+  box-shadow: var(--glass-card-shadow);
+  background: var(--glass-card-bg);
+  backdrop-filter: blur(10px); border: none;
+}
+.logo-container { text-align: center; margin-bottom: 30px; padding-top: 10px; }
+.logo-container h2 { margin: 16px 0 8px; color: var(--el-text-color-primary); font-size: 24px; font-weight: 600; }
+.subtitle { margin: 0; color: var(--el-text-color-secondary); font-size: 14px; }
+.action-container { display: flex; justify-content: center; margin-bottom: 30px; }
+.github-btn {
+  width: 100%; height: 50px; font-size: 16px; border-radius: 8px;
+  background-color: var(--github-btn-bg); border-color: var(--github-btn-border);
+}
+.github-btn:hover, .github-btn:focus {
+  background-color: #4a4e53; border-color: #4a4e53;
+  transform: translateY(-2px); box-shadow: 0 4px 12px rgba(36, 41, 46, 0.3);
+}
+.footer-tips { margin-top: 10px; }
+
+/* OAuthCallback.vue */
+.callback-container { display: flex; justify-content: center; align-items: center; height: 100%; background: transparent; }
+.loading-card {
+  width: 100%; max-width: 420px; border-radius: 16px;
+  background: var(--glass-card-bg);
+  backdrop-filter: blur(10px);
+}
+
+/* AccountList.vue */
+.account-card {
+  border-radius: 12px; 
+  /* 全局规则已覆盖 transition，此处只需定义样式 */
+  border: 1px solid var(--el-border-color-lighter);
+  cursor: pointer; background-color: var(--el-bg-color);
+  height: 100%;
+  display: flex; flex-direction: column;
+}
+.account-card:hover { transform: translateY(-5px); box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1) !important; }
+.account-list-wrapper .card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
+
+/* Flex 容器：限制宽度以支持内部文本截断 */
+.service-info {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  flex: 1;        /* 占据剩余空间 */
+  min-width: 0;   /* 关键：允许 Flex 子项收缩 */
+  margin-right: 10px;
+}
+
+/* 标题截断逻辑 */
+.service-name { margin: 0; font-size: 18px; color: var(--el-text-color-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
+
+/* 让卡片内容撑开，底部对齐 */
+.account-card .el-card__body {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+}
+.account-name { color: var(--el-text-color-secondary); font-size: 14px; margin: 0 0 10px 24px; word-break: break-all; }
+.more-icon { cursor: pointer; color: var(--el-text-color-secondary); padding: 5px; }
+.more-icon:hover { color: #409EFF; }
+.account-card.is-selected { border: 1px solid #409EFF; background-color: var(--account-selected-bg); }
+
+.batch-text { color: var(--el-text-color-regular); font-size: 14px; }
+.code-display-area { display: flex; justify-content: space-between; align-items: center; margin-top: auto; padding-left: 24px; padding-top: 15px; }
+.code-left { display: flex; flex-direction: column; justify-content: center; }
+.current-code { font-size: 24px; font-weight: bold; color: #409EFF; letter-spacing: 2px; line-height: 1; font-family: monospace; }
+.next-code { font-size: 16px; color: var(--el-text-color-secondary); margin-top: 4px; font-family: monospace; }
+.timer-text { font-size: 12px; color: var(--el-text-color-regular); font-weight: bold; display: block; text-align: center; }
+.el-progress__text { 
+  top: 0; left: 0; width: 100%; height: 100%; transform: none;
+  display: flex; align-items: center; justify-content: center; min-width:30px;
+}
+
+/* AccountList - QR Dialog */
+.qr-container { display: flex; flex-direction: column; align-items: center; text-align: center; }
+.qr-info { margin-bottom: 15px; }
+.qr-service { margin: 0 0 5px 0; font-size: 20px; color: var(--el-text-color-primary); }
+.qr-account { margin: 0; color: var(--el-text-color-secondary); font-size: 14px; }
+.qr-image-wrapper { margin: 10px 0; padding: 10px; background: #fff; border-radius: 8px; border: 1px solid var(--el-border-color-lighter); }
+.qr-code-img { display: block; width: 200px; height: 200px; }
+.qr-tip { font-size: 12px; color: var(--el-text-color-regular); margin: 10px 0 20px 0; }
+.secret-section { width: 100%; margin-bottom: 15px; }
+.secret-box { display: flex; align-items: center; justify-content: space-between; background: var(--el-fill-color-light); padding: 10px 15px; border-radius: 6px; border: 1px solid var(--el-border-color-light); }
+.secret-text { font-family: monospace; font-size: 14px; color: var(--el-text-color-regular); letter-spacing: 1px; }
+.secret-actions { display: flex; gap: 15px; }
+.action-icon { cursor: pointer; font-size: 16px; color: var(--el-text-color-secondary); transition: color 0.2s; }
+.action-icon:hover { color: #409EFF; }
+.uri-link-wrapper { margin-top: 5px; }
+
+/* BackupSettings.vue */
+.header-actions { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
+.provider-card { height: 100%; }
+.backup-container .card-header { display: flex; justify-content: space-between; align-items: center; }
+.provider-info { display: flex; align-items: center; }
+.provider-title { display: flex; align-items: center; gap: 8px; font-weight: bold; flex-wrap: wrap; }
+.status-text { font-size: 13px; color: var(--el-text-color-regular); margin-bottom: 15px; }
+.action-buttons { display: flex; gap: 10px; }
+.form-tip { font-size: 12px; color: var(--el-text-color-secondary); margin-top: 5px; }
+.success-tip { padding: 10px; background-color: var(--success-tip-bg); border-radius: 4px; color: var(--el-color-success); font-size: 13px; display: flex; align-items: center; gap: 8px; width: 100%; }
+
+/* DataImport.vue & DataExport.vue */
+.import-options, .export-options { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin-top: 20px; }
+.import-options .el-button, .export-options .el-button { margin: 0; justify-content: flex-start; padding-left: 20px; height: auto; padding-top: 15px; padding-bottom: 15px; }
+@media (max-width: 768px) { 
+  .import-options, .export-options { grid-template-columns: 1fr; } 
+}
+
+/* =========================================
+   4. UtilityTools 组件 (工具箱)
+   ========================================= */
+.tools-header {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  margin-bottom: 20px;
+}
+
+.tools-header .back-btn {
+  padding: 0;
+  font-size: 16px;
+  margin-right: 5px;
+}
+
+.tools-header h2 {
+  margin: 0;
+  font-size: 18px;
+  font-weight: 600;
+  color: var(--el-text-color-primary);
+}
+
+.tools-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
+  gap: 20px;
+}
+
+.tool-card {
+  cursor: pointer;
+  transition: all 0.3s;
+  border: 1px solid var(--el-border-color-lighter);
+}
+
+.tool-card:hover {
+  transform: translateY(-4px);
+  box-shadow: var(--el-box-shadow-light);
+}
+
+.tool-card-content {
+  display: flex;
+  align-items: center;
+}
+
+.icon-wrapper {
+  width: 50px;
+  height: 50px;
+  border-radius: 10px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  margin-right: 15px;
+}
+
+.text-info {
+  flex: 1;
+}
+
+.text-info h3 {
+  margin: 0 0 4px;
+  font-size: 16px;
+  font-weight: 600;
+  color: var(--el-text-color-primary);
+}
+
+.text-info p {
+  margin: 0;
+  font-size: 12px;
+  color: var(--el-text-color-secondary);
+  line-height: 1.4;
+}
+
+/* =========================================
+   5. UtilityTools 子组件详情页样式
+   ========================================= */
+
+/* 通用容器 */
+.tool-pane {
+  max-width: 600px;
+  margin: 0 auto;
+  padding: 10px 0;
+}
+
+/* --- ToolTimeSync (时间校准) --- */
+.time-sync-container {
+  text-align: center;
+}
+
+.clocks-wrapper {
+  display: flex;
+  gap: 20px;
+  margin-bottom: 30px;
+}
+
+.clock-card {
+  flex: 1;
+  background: var(--el-bg-color-overlay);
+  border: 1px solid var(--el-border-color-light);
+  border-radius: 12px;
+  padding: 20px;
+  text-align: center;
+  box-shadow: var(--el-box-shadow-light);
+}
+
+.clock-card.local { border-top: 4px solid #409EFF; }
+.clock-card.server { border-top: 4px solid #E6A23C; }
+
+.clock-label {
+  font-size: 14px;
+  color: var(--el-text-color-secondary);
+  margin-bottom: 10px;
+}
+
+.clock-time {
+  font-size: 24px;
+  font-weight: bold;
+  font-family: monospace;
+  color: var(--el-text-color-primary);
+}
+
+.sync-details {
+  background: var(--el-fill-color-light);
+  padding: 15px;
+  border-radius: 8px;
+  margin-bottom: 20px;
+  text-align: left;
+}
+
+.sync-details p {
+  margin: 5px 0;
+  display: flex;
+  justify-content: space-between;
+  color: var(--el-text-color-regular);
+}
+
+/* --- ToolQrParser (二维码解析) --- */
+.qr-parser-container {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+}
+
+.scan-area, .upload-area {
+  width: 100%;
+  margin-bottom: 20px;
+}
+
+.video-wrapper {
+  width: 100%;
+  border-radius: 12px;
+  overflow: hidden;
+  background: #000;
+  line-height: 0;
+}
+
+.camera-placeholder, .image-preview {
+  width: 100%;
+  height: 250px;
+  border: 2px dashed var(--el-border-color);
+  border-radius: 12px;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  cursor: pointer;
+  background: var(--el-fill-color-lighter);
+  transition: border-color 0.3s;
+  overflow: hidden;
+}
+
+.camera-placeholder:hover, .image-preview:hover {
+  border-color: #409EFF;
+}
+
+.camera-placeholder p, .upload-placeholder p {
+  margin-top: 10px;
+  color: var(--el-text-color-secondary);
+}
+
+.preview-img {
+  max-width: 100%;
+  max-height: 100%;
+  object-fit: contain;
+}
+
+.result-section {
+  width: 100%;
+}
+
+/* --- ToolPassword (密码生成) --- */
+.result-box {
+  background: var(--el-fill-color-light);
+  border: 1px solid var(--el-border-color);
+  border-radius: 8px;
+  padding: 20px;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: 30px;
+}
+
+.password-display {
+  font-family: monospace;
+  font-size: 20px;
+  font-weight: bold;
+  color: var(--el-text-color-primary);
+  word-break: break-all;
+  margin-right: 10px;
+}
+
+.controls {
+  background: var(--el-bg-color);
+  padding: 10px;
+}
+
+.control-row {
+  display: flex;
+  align-items: center;
+  margin-bottom: 20px;
+}
+
+.control-row.checkboxes {
+  justify-content: space-between;
+  flex-wrap: wrap;
+}
+
+.control-row .label {
+  min-width: 60px;
+  color: var(--el-text-color-regular);
+}
+
+@media (max-width: 768px) {
+  .clocks-wrapper {
+    flex-direction: column;
+  }
+  .control-row.checkboxes {
+    display: grid;
+    grid-template-columns: 1fr 1fr;
+    gap: 10px;
+  }
+}
+
+/* --- ToolTotpSecret (TOTP 密钥工具) --- */
+.totp-layout {
+  display: flex;
+  flex-direction: column;
+  gap: 30px;
+}
+
+.preview-top-section {
+  display: flex;
+  gap: 20px;
+  justify-content: center;
+  flex-wrap: wrap;
+}
+
+@media (max-width: 768px) {
+  .preview-top-section {
+    flex-direction: column;
+    align-items: center;
+  }
+}
+
+.qr-wrapper {
+  width: 200px;
+  height: 200px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: #fff;
+  border: 1px solid var(--el-border-color);
+  border-radius: 8px;
+  padding: 10px;
+  box-shadow: var(--el-box-shadow-light);
+  flex-shrink: 0;
+}
+
+.qr-img {
+  width: 100%;
+  height: 100%;
+}
+
+.uri-box {
+  margin-top: 15px;
+  background: var(--el-fill-color-light);
+  border-radius: 4px;
+  padding: 10px;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 10px;
+}
+
+.uri-text {
+  font-family: monospace;
+  font-size: 12px;
+  color: var(--el-text-color-regular);
+  word-break: break-all;
+  line-height: 1.4;
+}
+
+.config-section {
+  margin-bottom: 25px;
+}
+
+.section-title {
+  font-size: 16px;
+  font-weight: 600;
+  margin-bottom: 15px;
+  color: var(--el-text-color-primary);
+}
+
+.section-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 10px;
+}
+
+.label-row {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 5px;
+}
+
+.meta-row {
+  display: flex;
+  gap: 15px;
+  flex-wrap: wrap;
+}
+
+.meta-row .el-input {
+  flex: 1;
+  min-width: 200px;
+}
+
+.advanced-row {
+  display: flex;
+  gap: 10px;
+}
+
+.label-text {
+  font-size: 14px;
+  color: var(--el-text-color-regular);
+  font-weight: 500;
+}
+
+.result-card {
+  width: 200px;
+  height: 200px;
+  background: var(--el-bg-color-overlay);
+  border: 1px solid var(--el-border-color-light);
+  border-radius: 8px;
+  padding: 10px;
+  box-shadow: var(--el-box-shadow-light);
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  align-items: center;
+  flex-shrink: 0;
+}
+
+.totp-code {
+  font-size: 32px;
+  font-weight: bold;
+  color: #409EFF;
+  letter-spacing: 6px;
+  font-family: monospace;
+  margin-bottom: 5px;
+  transition: filter 0.3s;
+}
+
+.totp-code.blur {
+  filter: blur(4px);
+  opacity: 0.6;
+}
+
+.totp-timer {
+  font-size: 14px;
+  color: var(--el-text-color-secondary);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 5px;
+}
+
+.totp-timer.urgent {
+  color: #F56C6C;
+  font-weight: bold;
+}
+
+.tab-actions {
+  margin-top: 10px;
+  display: flex;
+  justify-content: flex-end;
+  gap: 10px;
+}
+
+.input-label {
+  margin-right: 12px;
+}
\ No newline at end of file
diff --git a/frontend/src/main.js b/frontend/src/main.js
index 3f0be0f..ebe58b4 100644
--- a/frontend/src/main.js
+++ b/frontend/src/main.js
@@ -1,11 +1,18 @@
 import { createApp } from 'vue'
 import ElementPlus from 'element-plus'
 import 'element-plus/dist/index.css'
+import 'element-plus/theme-chalk/dark/css-vars.css'
+import './main.css'
+import './dark.css'
 import App from './App.vue'
 import router from './router'
+import { initTheme } from './states/theme'
 
 const app = createApp(App)
 
+// 初始化主题状态 (从 localStorage 恢复)
+initTheme()
+
 app.use(router)
 app.use(ElementPlus)
 app.mount('#app')
\ No newline at end of file
diff --git a/frontend/src/states/theme.js b/frontend/src/states/theme.js
new file mode 100644
index 0000000..4888c21
--- /dev/null
+++ b/frontend/src/states/theme.js
@@ -0,0 +1,37 @@
+import { ref } from 'vue'
+
+export const isDark = ref(false)
+
+export const initTheme = () => {
+  // 1. 检查本地存储
+  const saved = localStorage.getItem('theme')
+  if (saved) {
+    isDark.value = saved === 'dark'
+  } else {
+    // 2. 跟随系统
+    isDark.value = window.matchMedia('(prefers-color-scheme: dark)').matches
+  }
+  applyTheme()
+}
+
+export const toggleTheme = () => {
+  isDark.value = !isDark.value
+  localStorage.setItem('theme', isDark.value ? 'dark' : 'light')
+  applyTheme()
+}
+
+const applyTheme = () => {
+  if (isDark.value) {
+    document.documentElement.classList.add('dark')
+  } else {
+    document.documentElement.classList.remove('dark')
+  }
+}
+
+// 监听系统变化 (仅在用户未手动设置过时生效)
+window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', (e) => {
+  if (!localStorage.getItem('theme')) {
+    isDark.value = e.matches
+    applyTheme()
+  }
+})
\ No newline at end of file
diff --git a/frontend/src/style.css b/frontend/src/style.css
deleted file mode 100644
index f691315..0000000
--- a/frontend/src/style.css
+++ /dev/null
@@ -1,79 +0,0 @@
-:root {
-  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
-  line-height: 1.5;
-  font-weight: 400;
-
-  color-scheme: light dark;
-  color: rgba(255, 255, 255, 0.87);
-  background-color: #242424;
-
-  font-synthesis: none;
-  text-rendering: optimizeLegibility;
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
-}
-
-a {
-  font-weight: 500;
-  color: #646cff;
-  text-decoration: inherit;
-}
-a:hover {
-  color: #535bf2;
-}
-
-body {
-  margin: 0;
-  display: flex;
-  place-items: center;
-  min-width: 320px;
-  min-height: 100vh;
-}
-
-h1 {
-  font-size: 3.2em;
-  line-height: 1.1;
-}
-
-button {
-  border-radius: 8px;
-  border: 1px solid transparent;
-  padding: 0.6em 1.2em;
-  font-size: 1em;
-  font-weight: 500;
-  font-family: inherit;
-  background-color: #1a1a1a;
-  cursor: pointer;
-  transition: border-color 0.25s;
-}
-button:hover {
-  border-color: #646cff;
-}
-button:focus,
-button:focus-visible {
-  outline: 4px auto -webkit-focus-ring-color;
-}
-
-.card {
-  padding: 2em;
-}
-
-#app {
-  max-width: 1280px;
-  margin: 0 auto;
-  padding: 2rem;
-  text-align: center;
-}
-
-@media (prefers-color-scheme: light) {
-  :root {
-    color: #213547;
-    background-color: #ffffff;
-  }
-  a:hover {
-    color: #747bff;
-  }
-  button {
-    background-color: #f9f9f9;
-  }
-}
diff --git a/frontend/src/views/Home.vue b/frontend/src/views/Home.vue
index a04eeaa..67624fc 100644
--- a/frontend/src/views/Home.vue
+++ b/frontend/src/views/Home.vue
@@ -2,18 +2,16 @@
   <el-container class="home-container">
     <el-container class="main-body">
       <!-- 侧边栏 (Desktop) -->
-      <el-aside width="240px" class="left-aside" v-if="!layoutState.isMobile">
+      <el-aside :width="isCollapse ? '64px' : '240px'" class="left-aside" v-if="!layoutState.isMobile">
         <el-menu
           :default-active="activeTab"
           class="side-menu"
           @select="handleMenuSelect"
-          background-color="#fff"
-          text-color="#606266"
-          active-text-color="#409EFF"
+          :collapse="isCollapse"
         >
           <el-menu-item index="accounts">
             <el-icon><Iphone /></el-icon>
-            <span>我的账户</span>
+            <template #title><span>我的账户</span></template>
           </el-menu-item>
 
           <el-sub-menu index="add-account">
@@ -37,9 +35,22 @@
           </el-sub-menu>
 
           <el-menu-item index="backups">
-            <el-icon><Cloudy /></el-icon><span>云端备份</span>
+            <el-icon><Cloudy /></el-icon><template #title><span>云端备份</span></template>
+          </el-menu-item>
+
+          <el-menu-item index="tools">
+            <el-icon><Tools /></el-icon><template #title><span>实用工具</span></template>
           </el-menu-item>
         </el-menu>
+
+        <!-- 底部切换按钮 -->
+        <div class="sidebar-footer" :class="{ 'is-collapsed': isCollapse }">
+          <el-button circle :icon="isCollapse ? Expand : Fold" @click="toggleCollapse" :title="isCollapse ? '展开' : '折叠'" />
+          <el-button circle :icon="isDark ? Sunny : Moon" @click="toggleTheme" />
+          <el-button circle @click="handleLogout" title="退出登录">
+            <el-icon><SwitchButton /></el-icon>
+          </el-button>
+        </div>
       </el-aside>
 
       <!-- 抽屉菜单 (Mobile) -->
@@ -49,38 +60,50 @@
         size="240px"
         :with-header="false"
       >
-        <el-menu
-          :default-active="activeTab"
-          class="side-menu"
-          @select="handleMenuSelect"
-          style="border-right: none;"
-        >
-          <el-menu-item index="accounts">
-            <el-icon><Iphone /></el-icon>
-            <span>我的账户</span>
-          </el-menu-item>
-          <el-sub-menu index="add-account">
-            <template #title>
-              <el-icon><Plus /></el-icon><span>添加账号</span>
-            </template>
-            <el-menu-item index="add-account-scan">
-              <el-icon><Camera /></el-icon><span>扫码添加</span>
+        <div class="drawer-content">
+          <el-menu
+            :default-active="activeTab"
+            class="side-menu"
+            @select="handleMenuSelect"
+            style="border-right: none;"
+          >
+            <el-menu-item index="accounts">
+              <el-icon><Iphone /></el-icon>
+              <span>我的账户</span>
             </el-menu-item>
-            <el-menu-item index="add-account-manual">
-              <el-icon><Edit /></el-icon><span>手动输入</span>
+            <el-sub-menu index="add-account">
+              <template #title>
+                <el-icon><Plus /></el-icon><span>添加账号</span>
+              </template>
+              <el-menu-item index="add-account-scan">
+                <el-icon><Camera /></el-icon><span>扫码添加</span>
+              </el-menu-item>
+              <el-menu-item index="add-account-manual">
+                <el-icon><Edit /></el-icon><span>手动输入</span>
+              </el-menu-item>
+            </el-sub-menu>
+            <el-sub-menu index="migration">
+              <template #title>
+                <el-icon><Sort /></el-icon><span>数据迁移</span>
+              </template>
+              <el-menu-item index="migration-export"><el-icon><Upload /></el-icon><span>数据导出</span></el-menu-item>
+              <el-menu-item index="migration-import"><el-icon><Download /></el-icon><span>数据导入</span></el-menu-item>
+            </el-sub-menu>
+            <el-menu-item index="backups">
+              <el-icon><Cloudy /></el-icon><span>云端备份</span>
             </el-menu-item>
-          </el-sub-menu>
-          <el-sub-menu index="migration">
-            <template #title>
-              <el-icon><Sort /></el-icon><span>数据迁移</span>
-            </template>
-            <el-menu-item index="migration-export"><el-icon><Upload /></el-icon><span>数据导出</span></el-menu-item>
-            <el-menu-item index="migration-import"><el-icon><Download /></el-icon><span>数据导入</span></el-menu-item>
-          </el-sub-menu>
-          <el-menu-item index="backups">
-            <el-icon><Cloudy /></el-icon><span>云端备份</span>
-          </el-menu-item>
-        </el-menu>
+            <el-menu-item index="tools">
+              <el-icon><Tools /></el-icon><span>实用工具</span>
+            </el-menu-item>
+          </el-menu>
+          
+          <div class="sidebar-footer">
+            <el-button circle :icon="isDark ? Sunny : Moon" @click="toggleTheme" />
+            <el-button circle @click="handleLogout" title="退出登录">
+              <el-icon><SwitchButton /></el-icon>
+            </el-button>
+          </div>
+        </div>
       </el-drawer>
 
       <el-main class="main-content">
@@ -112,6 +135,11 @@
           <DataBackup @success="handleSuccess" />
         </div>
 
+        <!-- 视图：实用工具 -->
+        <div v-if="activeTab === 'tools'" class="view-container">
+          <UtilityTools />
+        </div>
+
       </el-main>
     </el-container>
   </el-container>
@@ -119,8 +147,12 @@
 
 <script setup>
 import { ref, nextTick } from 'vue'
-import { Iphone, Plus, Camera, Edit, Sort, Upload, Download, Cloudy } from '@element-plus/icons-vue'
+import { useRouter } from 'vue-router'
+import { ElMessage } from 'element-plus'
+import { Iphone, Plus, Camera, Edit, Sort, Upload, Download, Cloudy, Sunny, Moon, SwitchButton, Fold, Expand, Tools } from '@element-plus/icons-vue'
 import { layoutState } from '../states/layout'
+import { isDark, toggleTheme } from '../states/theme'
+import { userState } from '../states/user'
 
 import AccountList from '../components/AccountList.vue'
 import AddAccountScan from '../components/AddAccountScan.vue'
@@ -128,9 +160,12 @@ import AddAccountManual from '../components/AddAccountManual.vue'
 import DataExport from '../components/DataExport.vue'
 import DataImport from '../components/DataImport.vue'
 import DataBackup from '../components/DataBackup.vue'
+import UtilityTools from '../components/UtilityTools.vue'
 
 const activeTab = ref('accounts')
 const accountListRef = ref(null)
+const router = useRouter()
+const isCollapse = ref(localStorage.getItem('sidebar_collapse') === 'true')
 
 // 移动端菜单处理
 const handleMenuSelect = (index) => {
@@ -149,12 +184,23 @@ const handleSuccess = () => {
     }
   })
 }
+
+const handleLogout = () => {
+  userState.clearUserInfo()
+  router.push('/login')
+  ElMessage.success('已安全退出')
+}
+
+const toggleCollapse = () => {
+  isCollapse.value = !isCollapse.value
+  localStorage.setItem('sidebar_collapse', isCollapse.value)
+}
 </script>
 
 <style scoped>
 .home-container {
   height: 100%; /* 占满父容器 (App.vue 的 main) */
-  background-color: #f5f7fa;
+  background-color: var(--el-bg-color-page);
 }
 
 .main-body {
@@ -164,19 +210,56 @@ const handleSuccess = () => {
 }
 
 .left-aside {
-  background: white;
-  border-right: 1px solid #e6e6e6;
+  background: var(--el-bg-color);
+  border-right: 1px solid var(--el-border-color-light);
+  display: flex;
+  flex-direction: column;
+  overflow-x: hidden;
+  overflow-y: auto;
+  white-space: nowrap;
+}
+
+/* 视觉优化：隐藏侧边栏滚动条，保持界面清爽 */
+.left-aside::-webkit-scrollbar {
+  width: 0;
+  height: 0;
 }
 
 .side-menu {
   border-right: none;
   padding-top: 10px;
+  flex: 1;
 }
 
 .main-content {
   padding: 30px 20px;
   width: 100%;
-  background-color: #f5f7fa;
+  background-color: var(--el-bg-color-page);
   overflow-y: auto; /* 内容区独立滚动 */
 }
+
+.sidebar-footer {
+  padding: 20px;
+  text-align: center;
+  display: flex;
+  justify-content: center;
+  gap: 10px;
+}
+
+.sidebar-footer .el-button {
+  margin-left: 0;
+}
+
+.sidebar-footer.is-collapsed {
+  flex-direction: column;
+  align-items: center;
+  padding: 10px 0;
+}
+
+.drawer-content {
+  height: 100%;
+  display: flex;
+  flex-direction: column;
+  overflow-y: auto; /* 确保移动端菜单过长时可以滚动 */
+}
 </style>
\ No newline at end of file
diff --git a/frontend/src/views/Login.vue b/frontend/src/views/Login.vue
index 25e7197..a9d72ad 100644
--- a/frontend/src/views/Login.vue
+++ b/frontend/src/views/Login.vue
@@ -63,72 +63,4 @@ const handleGitHubLogin = async () => {
     loading.value = false
   }
 }
-</script>
-
-<style scoped>
-.login-container {
-  display: flex;
-  justify-content: center;
-  align-items: center;
-  height: 100%;
-  /* 这里的背景色会覆盖 App.vue 的全局背景 */
-  background: transparent; 
-}
-
-.login-card {
-  width: 100%;
-  max-width: 420px;
-  border-radius: 16px;
-  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
-  background: rgba(255, 255, 255, 0.95);
-  backdrop-filter: blur(10px);
-  border: none;
-}
-
-.logo-container {
-  text-align: center;
-  margin-bottom: 30px;
-  padding-top: 10px;
-}
-
-.logo-container h2 {
-  margin: 16px 0 8px;
-  color: #303133;
-  font-size: 24px;
-  font-weight: 600;
-}
-
-.subtitle {
-  margin: 0;
-  color: #909399;
-  font-size: 14px;
-}
-
-.action-container {
-  display: flex;
-  justify-content: center;
-  margin-bottom: 30px;
-}
-
-.github-btn {
-  width: 100%;
-  height: 50px;
-  font-size: 16px;
-  border-radius: 8px;
-  background-color: #24292e;
-  border-color: #24292e;
-  transition: all 0.3s;
-}
-
-.github-btn:hover,
-.github-btn:focus {
-  background-color: #4a4e53;
-  border-color: #4a4e53;
-  transform: translateY(-2px);
-  box-shadow: 0 4px 12px rgba(36, 41, 46, 0.3);
-}
-
-.footer-tips {
-  margin-top: 10px;
-}
-</style>
\ No newline at end of file
+</script>
\ No newline at end of file
diff --git a/frontend/src/views/OAuthCallback.vue b/frontend/src/views/OAuthCallback.vue
index 2888ab2..8f53d36 100644
--- a/frontend/src/views/OAuthCallback.vue
+++ b/frontend/src/views/OAuthCallback.vue
@@ -88,22 +88,4 @@ onMounted(async () => {
 const goBackToLogin = () => {
   router.push('/login')
 }
-</script>
-
-<style scoped>
-.callback-container {
-  display: flex;
-  justify-content: center;
-  align-items: center;
-  height: 100%;
-  background: transparent;
-}
-
-.loading-card {
-  width: 100%;
-  max-width: 420px;
-  border-radius: 16px;
-  background: rgba(255, 255, 255, 0.95);
-  backdrop-filter: blur(10px);
-}
-</style>
\ No newline at end of file
+</script>
\ No newline at end of file