diff --git a/src/assets/styles/index.scss b/src/assets/styles/index.scss
index 87898e6..3027045 100644
--- a/src/assets/styles/index.scss
+++ b/src/assets/styles/index.scss
@@ -123,6 +123,7 @@ aside {
 //main-container全局样式
 .app-container {
   padding: 20px;
+  transition: background-color 0.3s ease;
 }
 
 .components-container {
diff --git a/src/assets/styles/variables.module.scss b/src/assets/styles/variables.module.scss
index 4579b69..a884595 100644
--- a/src/assets/styles/variables.module.scss
+++ b/src/assets/styles/variables.module.scss
@@ -89,49 +89,74 @@ $--color-info: #909399;
 
 // 暗黑模式变量
 html.dark {
-  /* 默认通用 */
-  --el-bg-color: #141414;
-  --el-bg-color-overlay: #1d1e1f;
-  --el-text-color-primary: #ffffff;
-  --el-text-color-regular: #d0d0d0;
-  --el-border-color: #434343;
-  --el-border-color-light: #434343;
+  /* 默认通用 - 优化为更舒适的深色背景 */
+  --el-bg-color: #0f1419;
+  --el-bg-color-overlay: #1a1f24;
+  --el-text-color-primary: #e4e7ed;
+  --el-text-color-regular: #b3b9c4;
+  --el-border-color: #2d3339;
+  --el-border-color-light: #252a2f;
+
+  /* 主体内容区域背景 */
+  --main-bg-color: #0f1419;
+  --content-bg-color: #151a20;
 
   /* 侧边栏 */
-  --sidebar-bg: #141414;
-  --sidebar-text: #ffffff;
-  --menu-hover: #2d2d2d;
+  --sidebar-bg: #0f1419;
+  --sidebar-text: #e4e7ed;
+  --menu-hover: #1f2529;
   --menu-active-text: #{$menuActiveText};
 
   /* 顶部导航栏 */
-  --navbar-bg: #141414;
-  --navbar-text: #ffffff;
-  --navbar-hover: #141414;
+  --navbar-bg: #0f1419;
+  --navbar-text: #e4e7ed;
+  --navbar-hover: #1a1f24;
+  --navbar-border: #252a2f;
 
   /* 标签栏 */
-  --tags-bg: #141414;
-  --tags-item-bg: #1d1e1f;
-  --tags-item-border: #303030;
-  --tags-item-text: #d0d0d0;
-  --tags-item-hover: #2d2d2d;
-  --tags-close-hover: #64666a;
+  --tags-bg: #0f1419;
+  --tags-item-bg: #1a1f24;
+  --tags-item-border: #252a2f;
+  --tags-item-text: #b3b9c4;
+  --tags-item-hover: #1f2529;
+  --tags-close-hover: #4a5568;
 
   /* splitpanes 组件暗黑模式变量 */
-  --splitpanes-bg: #141414;
-  --splitpanes-border: #303030;
-  --splitpanes-splitter-bg: #1d1e1f;
-  --splitpanes-splitter-hover-bg: #2d2d2d;
+  --splitpanes-bg: #0f1419;
+  --splitpanes-border: #252a2f;
+  --splitpanes-splitter-bg: #1a1f24;
+  --splitpanes-splitter-hover-bg: #1f2529;
 
   /* blockquote 暗黑模式变量 */
-  --blockquote-bg: #1d1e1f;
-  --blockquote-border: #303030;
-  --blockquote-text: #d0d0d0;
+  --blockquote-bg: #1a1f24;
+  --blockquote-border: #252a2f;
+  --blockquote-text: #b3b9c4;
   
   /* Cron 时间表达式 模式变量 */
-  --cron-border: #303030;
+  --cron-border: #252a2f;
 
   /* splitpanes default-theme 暗黑模式变量 */
-  --splitpanes-default-bg: #141414;
+  --splitpanes-default-bg: #0f1419;
+
+  /* 搜索框暗黑模式变量 */
+  --search-bg: #1a1f24;
+  --search-border: #252a2f;
+  --search-text: #e4e7ed;
+  --search-placeholder: #6b7280;
+  --search-hover-bg: #1f2529;
+  --search-suffix-bg: #252a2f;
+
+  /* 下拉菜单暗黑模式变量 */
+  --dropdown-bg: #1a1f24;
+  --dropdown-border: #252a2f;
+  --dropdown-item-hover: #1f2529;
+  --dropdown-divider: #252a2f;
+
+  /* 主体内容区域 */
+  --main-bg-color: #0f1419;
+  --content-bg-color: #151a20;
+  --card-bg-color: #1a1f24;
+  --card-border-color: #252a2f;
 
   /* 侧边栏菜单覆盖 */
    .sidebar-container {
@@ -224,5 +249,63 @@ html.dark {
     background: var(--cron-border);
   }
 
+  /* 主体内容区域样式覆盖 */
+  .app-main {
+    background-color: var(--main-bg-color) !important;
+  }
+
+  .app-container {
+    background-color: var(--content-bg-color);
+    color: var(--el-text-color-primary);
+  }
+
+  .components-container {
+    background-color: var(--content-bg-color);
+    color: var(--el-text-color-primary);
+  }
+
+  /* 卡片样式夜间模式 */
+  .el-card {
+    background-color: var(--card-bg-color) !important;
+    border-color: var(--card-border-color) !important;
+    color: var(--el-text-color-primary) !important;
+  }
+
+  /* 面包屑导航夜间模式 */
+  .el-breadcrumb {
+    .el-breadcrumb__inner {
+      color: var(--el-text-color-regular) !important;
+
+      &.is-link {
+        color: var(--el-text-color-regular) !important;
+
+        &:hover {
+          color: var(--el-color-primary) !important;
+        }
+      }
+    }
+  }
+
+  /* 侧边栏菜单项夜间模式优化 */
+  .sidebar-container {
+    .el-menu-item,
+    .el-sub-menu__title {
+      &:hover {
+        background-color: rgba(0, 168, 98, 0.12) !important;
+      }
+    }
+
+    .el-menu-item.is-active {
+      background-color: rgba(0, 168, 98, 0.18) !important;
+    }
+  }
+
+  /* 导航栏汉堡菜单夜间模式 */
+  .hamburger-container {
+    &:hover {
+      background: rgba(255, 255, 255, 0.05) !important;
+    }
+  }
+
 }
 
diff --git a/src/layout/components/AppMain.vue b/src/layout/components/AppMain.vue
index d6b95c6..e473c8e 100644
--- a/src/layout/components/AppMain.vue
+++ b/src/layout/components/AppMain.vue
@@ -42,6 +42,8 @@ function addIframe() {
   width: 100%;
   position: relative;
   overflow: hidden;
+  background-color: var(--main-bg-color, #ffffff);
+  transition: background-color 0.3s ease;
 }
 
 .fixed-header + .app-main {
@@ -81,10 +83,32 @@ function addIframe() {
 
 ::-webkit-scrollbar-track {
   background-color: #f1f1f1;
+  transition: background-color 0.3s ease;
 }
 
 ::-webkit-scrollbar-thumb {
   background-color: #c0c0c0;
   border-radius: 3px;
+  transition: background-color 0.3s ease;
+
+  &:hover {
+    background-color: #a0a0a0;
+  }
+}
+
+// 夜间模式滚动条样式
+html.dark {
+  ::-webkit-scrollbar-track {
+    background-color: var(--el-bg-color, #0f1419);
+  }
+
+  ::-webkit-scrollbar-thumb {
+    background-color: #4a5568;
+    border-radius: 3px;
+
+    &:hover {
+      background-color: #5a6578;
+    }
+  }
 }
 </style>
diff --git a/src/layout/components/Navbar.vue b/src/layout/components/Navbar.vue
index 9fb87ef..d45b59a 100644
--- a/src/layout/components/Navbar.vue
+++ b/src/layout/components/Navbar.vue
@@ -20,7 +20,8 @@
                         style="width: 130px"
                         placeholder="搜索"
                         class="search-input"
-                        @keydown.ctrl.k="handleSearch"
+                        readonly
+                        @click="handleSearch"
                     >
                         <template #prefix>
                             <el-icon class="el-input__icon"><search /></el-icon>
@@ -30,18 +31,28 @@
                         </template>
                     </el-input>
 
-                    <Icon size="18">
-                        <Moon />
-                    </Icon>
-                    <Icon size="18">
-                        <ScanOutline />
-                    </Icon>
-                    <Icon size="18">
-                        <SunnyOutline />
-                    </Icon>
-                    <Icon size="18">
-                        <NotificationsOutline />
-                    </Icon>
+                    <el-tooltip
+                        :content="settingsStore.isDark ? '切换到日间模式' : '切换到夜间模式'"
+                        effect="dark"
+                        placement="bottom"
+                    >
+                        <div class="icon-wrapper theme-toggle" @click="handleThemeToggle">
+                            <Icon size="18">
+                                <SunnyOutline v-if="settingsStore.isDark" />
+                                <Moon v-else />
+                            </Icon>
+                        </div>
+                    </el-tooltip>
+                    <div class="icon-wrapper">
+                        <Icon size="18">
+                            <ScanOutline />
+                        </Icon>
+                    </div>
+                    <div class="icon-wrapper">
+                        <Icon size="18">
+                            <NotificationsOutline />
+                        </Icon>
+                    </div>
                 </div>
 
                 <!-- <screenfull id="screenfull" class="right-menu-item hover-effect" />
@@ -62,10 +73,9 @@
             </template>
 
             <el-dropdown
+                placement="bottom-end"
                 @command="handleCommand"
                 class="avatar-container right-menu-item hover-effect"
-                placement="bottom-end"
-                trigger="click"
             >
                 <div class="avatar-wrapper">
                     <img :src="userStore.avatar" class="user-avatar" />
@@ -137,7 +147,9 @@
 </template>
 
 <script setup>
+import { onMounted, onUnmounted } from 'vue'
 import { ElMessageBox } from 'element-plus'
+import { Search } from '@element-plus/icons-vue'
 import {
     Moon,
     ScanOutline,
@@ -149,6 +161,7 @@ import {
     ChevronForward,
     ExitOutline,
 } from '@vicons/ionicons5'
+import { initThemeTransitionCSS } from '@/utils/themeTransition'
 import { Icon } from '@vicons/utils'
 import Breadcrumb from '@/components/Breadcrumb'
 import TopNav from '@/components/TopNav'
@@ -206,9 +219,34 @@ function toggleTheme() {
     settingsStore.toggleTheme()
 }
 
+// 处理主题切换（带动画）
+function handleThemeToggle(event) {
+    settingsStore.toggleThemeWithAnimation(event)
+}
+
 const handleSearch = () => {
     console.log('handleSearch')
+    // 这里后续会打开搜索框
 }
+
+// 监听全局 Ctrl+K 快捷键
+const handleKeyDown = (e) => {
+    if (e.ctrlKey && e.key === 'k') {
+        e.preventDefault()
+        e.stopPropagation()
+        handleSearch()
+    }
+}
+
+onMounted(() => {
+    window.addEventListener('keydown', handleKeyDown)
+    // 初始化主题切换动画 CSS
+    initThemeTransitionCSS()
+})
+
+onUnmounted(() => {
+    window.removeEventListener('keydown', handleKeyDown)
+})
 </script>
 
 <style lang='scss' scoped>
@@ -218,6 +256,7 @@ const handleSearch = () => {
     position: relative;
     background: var(--navbar-bg);
     box-shadow: 0 2px 8px rgba(0, 168, 98, 0.1);
+    transition: background-color 0.3s ease, box-shadow 0.3s ease;
 
     .hamburger-container {
         line-height: 46px;
@@ -260,6 +299,7 @@ const handleSearch = () => {
             justify-content: center;
             gap: 18px;
             border-right: 1px solid #e0e0e0;
+            transition: border-color 0.3s ease;
         }
 
         &:focus {
@@ -311,18 +351,24 @@ const handleSearch = () => {
                 align-items: center;
                 border-radius: 6px;
                 padding: 4px;
+                transition: all 0.3s ease;
+
                 .user-avatar {
                     cursor: pointer;
                     width: 30px;
                     height: 30px;
                     margin-right: 8px;
                     border-radius: 50%;
+                    border: 2px solid transparent;
+                    transition: border-color 0.3s ease;
                 }
 
                 .user-nickname {
                     padding: 0 4px;
                     font-size: 14px;
-                    font-weight: bold;
+                    font-weight: 500;
+                    color: var(--navbar-text, #303133);
+                    transition: color 0.3s ease;
                 }
 
                 i {
@@ -349,6 +395,7 @@ const handleSearch = () => {
     font-size: 14px;
     font-family: 'PingFang SC', 'Microsoft YaHei', 'Arial', sans-serif;
     border-bottom: 1px dashed #f0f0f0;
+    transition: border-color 0.3s ease;
 
     .user-info-text {
         margin-left: 6px;
@@ -359,6 +406,7 @@ const handleSearch = () => {
             display: flex;
             align-items: center;
             justify-content: space-between;
+            gap: 8px;
         }
     }
 
@@ -367,16 +415,20 @@ const handleSearch = () => {
         height: 36px;
         margin-right: 8px;
         border-radius: 4px;
+        border: 2px solid transparent;
+        transition: border-color 0.3s ease;
     }
 
     .user-info-text div:last-child {
         color: #909599;
+        font-size: 12px;
     }
 }
 
 .user-info-item {
     padding: 4px 0 14px 0;
     border-bottom: 1px dashed #f0f0f0;
+    transition: border-color 0.3s ease;
 
     .user-info-item-text {
         padding: 12px 20px;
@@ -384,11 +436,24 @@ const handleSearch = () => {
         align-items: center;
         justify-content: space-between;
         cursor: pointer;
-        transition: all 0.6s ease;
-    }
-    .user-info-item-text:hover {
-        background-color: #f3f3f5;
-        border-radius: 4px;
+        transition: all 0.3s ease;
+        border-radius: 6px;
+        margin: 0 4px;
+        color: var(--el-text-color-regular, #606266);
+
+        :deep(svg) {
+            color: inherit;
+            transition: transform 0.3s ease;
+        }
+
+        &:hover {
+            background-color: rgba(0, 168, 98, 0.1);
+            color: var(--el-color-primary, #00a862);
+
+            :deep(svg:last-child) {
+                transform: translateX(2px);
+            }
+        }
     }
 }
 
@@ -399,20 +464,26 @@ const handleSearch = () => {
     justify-content: center;
 
     .logout-item-text {
-        padding: 6px 16px;
+        padding: 8px 20px;
         display: flex;
         align-items: center;
         justify-content: center;
+        gap: 6px;
         cursor: pointer;
         background-color: #f4f5f5;
-        border-radius: 4px;
+        border-radius: 6px;
         color: #767c82;
-        border-radius: 4px;
         letter-spacing: 1px;
-        transition: all 0.6s ease;
+        transition: all 0.3s ease;
+        font-size: 14px;
+
+        :deep(svg) {
+            color: inherit;
+        }
 
         &:hover {
-            background-color: #eceded;
+            background-color: rgba(245, 108, 108, 0.1);
+            color: #f56c6c;
         }
     }
 }
@@ -427,6 +498,25 @@ const handleSearch = () => {
     --el-input-border-color: transparent;
     --el-input-hover-border-color: transparent;
     --el-input-focus-border-color: transparent;
+    cursor: pointer;
+    transition: all 0.3s ease;
+
+    .el-input__wrapper {
+        cursor: pointer;
+        transition: all 0.3s ease;
+    }
+
+    .el-input__inner {
+        cursor: pointer;
+        caret-color: transparent;
+        transition: all 0.3s ease;
+    }
+
+    &:hover {
+        .el-input__wrapper {
+            background-color: rgba(0, 168, 98, 0.08);
+        }
+    }
 }
 
 .search-input-suffix-text {
@@ -435,16 +525,200 @@ const handleSearch = () => {
     line-height: 25px;
     padding: 0 4px;
     border-radius: 6px;
+    transition: all 0.3s ease;
+    font-size: 11px;
+    color: #909399;
 }
 
 .xicon {
     cursor: pointer;
 }
 
-.xicon:hover {
-    color: #00a862;
-    background-color: rgba(0, 168, 98, 0.1);
-    transform: scale(1.2);
+.icon-wrapper {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    width: 32px;
+    height: 32px;
+    border-radius: 6px;
+    cursor: pointer;
     transition: all 0.3s ease;
+    color: var(--navbar-text, #5a5e66);
+
+    &:hover {
+        transform: scale(1.1);
+        background-color: rgba(0, 168, 98, 0.1);
+
+        .xicon {
+            color: #00a862;
+        }
+    }
+
+    &.theme-toggle {
+        position: relative;
+
+        // 图标旋转动画
+        :deep(svg) {
+            transition: transform 0.3s ease;
+            color: inherit;
+        }
+
+        &:hover {
+            :deep(svg) {
+                transform: rotate(15deg);
+            }
+        }
+    }
+}
+</style>
+
+<style lang='scss'>
+// 全局样式，用于 Element Plus 的 popper（挂载在 body 下）
+.el-dropdown__popper .el-dropdown__list {
+    padding: 8px 14px !important;
+    border-radius: 8px;
+    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
+    transition: all 0.3s ease;
+}
+
+// 夜间模式下的导航栏样式
+html.dark {
+    .navbar {
+        background: var(--navbar-bg);
+        border-bottom: 1px solid var(--navbar-border, #252a2f);
+        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
+
+        .right-menu {
+            .icon-container {
+                border-right-color: var(--navbar-border, #252a2f);
+            }
+        }
+
+        .avatar-container {
+            .avatar-wrapper {
+                .user-nickname {
+                    color: var(--navbar-text);
+                }
+
+                &:hover {
+                    background-color: var(--navbar-hover);
+                }
+            }
+        }
+    }
+
+    // 搜索框夜间模式样式
+    .icon-container :deep(.el-input) {
+        --el-input-bg-color: var(--search-bg, #1a1f24);
+        --el-input-text-color: var(--search-text, #e4e7ed);
+        --el-input-placeholder-color: var(--search-placeholder, #6b7280);
+
+        .el-input__wrapper {
+            background-color: var(--search-bg, #1a1f24);
+            border: 1px solid var(--search-border, #252a2f);
+            box-shadow: none;
+
+            &:hover {
+                background-color: var(--search-hover-bg, #1f2529);
+                border-color: var(--el-color-primary);
+            }
+        }
+
+        .el-input__inner {
+            color: var(--search-text, #e4e7ed);
+
+            &::placeholder {
+                color: var(--search-placeholder, #6b7280);
+            }
+        }
+
+        .el-input__icon {
+            color: var(--search-placeholder, #6b7280);
+        }
+    }
+
+    .search-input-suffix-text {
+        background-color: var(--search-suffix-bg, #252a2f);
+        color: var(--search-placeholder, #6b7280);
+        border: 1px solid var(--search-border, #252a2f);
+    }
+
+    // 图标夜间模式样式
+    .icon-wrapper {
+        color: var(--navbar-text, #e4e7ed);
+
+        &:hover {
+            background-color: rgba(0, 168, 98, 0.15);
+        }
+    }
+
+    // 下拉菜单夜间模式样式
+    .el-dropdown__popper {
+        background-color: var(--dropdown-bg, #1a1f24) !important;
+        border: 1px solid var(--dropdown-border, #252a2f) !important;
+        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4) !important;
+
+        .el-dropdown-menu {
+            background-color: transparent;
+            border: none;
+        }
+
+        .el-dropdown-menu__item {
+            color: var(--el-text-color-regular, #b3b9c4) !important;
+
+            &:not(.is-disabled):hover,
+            &:not(.is-disabled):focus {
+                background-color: var(--dropdown-item-hover, #1f2529) !important;
+                color: var(--el-color-primary, #00a862) !important;
+            }
+        }
+    }
+
+    // 用户信息区域夜间模式样式
+    .user-info {
+        border-bottom-color: var(--dropdown-divider, #252a2f);
+        color: var(--el-text-color-primary, #e4e7ed);
+
+        .user-info-text {
+            div:first-child {
+                span {
+                    color: var(--el-text-color-primary, #e4e7ed);
+                }
+            }
+
+            div:last-child {
+                color: var(--el-text-color-regular, #b3b9c4);
+            }
+        }
+
+        .user-avatar {
+            border-color: var(--dropdown-border, #252a2f);
+        }
+    }
+
+    .user-info-item {
+        border-bottom-color: var(--dropdown-divider, #252a2f);
+
+        .user-info-item-text {
+            color: var(--el-text-color-regular, #b3b9c4);
+
+            &:hover {
+                background-color: var(--dropdown-item-hover, #1f2529);
+                color: var(--el-color-primary, #00a862);
+            }
+        }
+    }
+
+    .logout-item {
+        .logout-item-text {
+            background-color: var(--dropdown-item-hover, #1f2529);
+            color: var(--el-text-color-regular, #b3b9c4);
+
+            &:hover {
+                background-color: rgba(245, 108, 108, 0.15);
+                color: #f56c6c;
+            }
+        }
+    }
 }
 </style>
diff --git a/src/store/modules/settings.js b/src/store/modules/settings.js
index 2d3d4f6..e74b6ef 100644
--- a/src/store/modules/settings.js
+++ b/src/store/modules/settings.js
@@ -1,6 +1,7 @@
 import defaultSettings from '@/settings'
 import { useDark, useToggle } from '@vueuse/core'
 import { useDynamicTitle } from '@/utils/dynamicTitle'
+import { toggleThemeWithTransition } from '@/utils/themeTransition'
 
 const isDark = useDark()
 const toggleDark = useToggle(isDark)
@@ -40,10 +41,17 @@ const useSettingsStore = defineStore(
         this.title = title
         useDynamicTitle()
       },
-      // 切换暗黑模式
+      // 切换暗黑模式（无动画）
       toggleTheme() {
         this.isDark = !this.isDark
         toggleDark()
+      },
+      // 切换暗黑模式（带动画）
+      toggleThemeWithAnimation(event = null) {
+        toggleThemeWithTransition(() => {
+          this.isDark = !this.isDark
+          toggleDark()
+        }, event)
       }
     }
   })
diff --git a/src/utils/themeTransition.js b/src/utils/themeTransition.js
new file mode 100644
index 0000000..663c3c7
--- /dev/null
+++ b/src/utils/themeTransition.js
@@ -0,0 +1,175 @@
+/**
+ * 主题切换动画工具函数
+ * 使用 View Transitions API 实现圆形扩展/收缩动画效果
+ */
+
+/**
+ * 计算从指定点到视口角落的最大距离
+ * @param {number} x - 点击位置的 x 坐标
+ * @param {number} y - 点击位置的 y 坐标
+ * @returns {number} 最大距离（像素）
+ */
+function getDistance(x, y) {
+  const maxX = Math.max(x, window.innerWidth - x)
+  const maxY = Math.max(y, window.innerHeight - y)
+  return Math.sqrt(maxX * maxX + maxY * maxY)
+}
+
+/**
+ * 执行主题切换动画
+ * @param {Function} callback - 主题切换的回调函数
+ * @param {MouseEvent} event - 点击事件对象（可选）
+ */
+export function toggleThemeWithTransition(callback, event = null) {
+  // 检查浏览器是否支持 View Transitions API
+  if (!document.startViewTransition) {
+    // 不支持时直接执行回调，无动画
+    callback()
+    return
+  }
+
+  // 获取当前主题状态（切换前的状态）
+  const wasDark = document.documentElement.classList.contains('dark')
+
+  // 获取点击位置，如果没有事件则使用默认位置（右上角图标位置）
+  let iconX, iconY
+  if (event) {
+    iconX = event.clientX
+    iconY = event.clientY
+  } else {
+    // 默认位置：右上角图标区域（可以根据实际图标位置调整）
+    iconX = window.innerWidth - 100
+    iconY = 25 // 导航栏高度的一半
+  }
+
+  // 左下角位置
+  const bottomLeftX = 0
+  const bottomLeftY = window.innerHeight
+
+  // 计算从不同位置到视口边缘的最大距离
+  const iconRadius = getDistance(iconX, iconY)
+  const bottomLeftRadius = getDistance(bottomLeftX, bottomLeftY)
+
+  // 创建 View Transition
+  const transition = document.startViewTransition(() => {
+    callback()
+  })
+
+  // 设置动画样式
+  transition.ready.then(() => {
+    if (!wasDark) {
+      // 当前是日间模式，切换到夜间模式
+      // 动画效果：从左下角扩展到右上角（图标位置）
+
+      // 旧视图（日间模式）退出：淡出
+      document.documentElement.animate(
+        [
+          { opacity: 1 },
+          { opacity: 0 }
+        ],
+        {
+          duration: 1000,
+          easing: 'ease-in',
+          pseudoElement: '::view-transition-old(root)'
+        }
+      )
+
+      // 新视图（夜间模式）进入：从左下角圆形扩展到图标位置
+      document.documentElement.animate(
+        [
+          {
+            clipPath: `circle(0px at ${bottomLeftX}px ${bottomLeftY}px)`,
+            opacity: 0
+          },
+          {
+            clipPath: `circle(${iconRadius}px at ${iconX}px ${iconY}px)`,
+            opacity: 1
+          }
+        ],
+        {
+          duration: 1000,
+          easing: 'cubic-bezier(0.4, 0, 0.2, 1)',
+          pseudoElement: '::view-transition-new(root)'
+        }
+      )
+    } else {
+      // 当前是夜间模式，切换到日间模式
+      // 动画效果：从图标位置收缩到左下角
+
+      // 旧视图（夜间模式）退出：从图标位置圆形收缩到左下角
+      document.documentElement.animate(
+        [
+          {
+            clipPath: `circle(${iconRadius}px at ${iconX}px ${iconY}px)`,
+            opacity: 1
+          },
+          {
+            clipPath: `circle(0px at ${bottomLeftX}px ${bottomLeftY}px)`,
+            opacity: 0
+          }
+        ],
+        {
+          duration: 600,
+          easing: 'cubic-bezier(0.4, 0, 0.2, 1)',
+          pseudoElement: '::view-transition-old(root)'
+        }
+      )
+
+      // 新视图（日间模式）进入：从图标位置扩展到全屏
+      document.documentElement.animate(
+        [
+          {
+            clipPath: `circle(0px at ${iconX}px ${iconY}px)`,
+            opacity: 0
+          },
+          {
+            clipPath: `circle(${iconRadius}px at ${iconX}px ${iconY}px)`,
+            opacity: 1
+          }
+        ],
+        {
+          duration: 600,
+          easing: 'cubic-bezier(0.4, 0, 0.2, 1)',
+          pseudoElement: '::view-transition-new(root)'
+        }
+      )
+    }
+  })
+}
+
+/**
+ * 初始化 View Transitions API 的 CSS
+ * 需要在应用启动时调用
+ */
+export function initThemeTransitionCSS() {
+  // 检查是否已经添加过样式
+  if (document.getElementById('theme-transition-style')) {
+    return
+  }
+
+  const style = document.createElement('style')
+  style.id = 'theme-transition-style'
+  style.textContent = `
+    /* View Transitions API 样式 */
+    @view-transition {
+      navigation: auto;
+    }
+
+    ::view-transition-old(root),
+    ::view-transition-new(root) {
+      animation-duration: 0.6s;
+      animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
+    }
+
+    /* 确保动画覆盖整个视口 */
+    ::view-transition-old(root),
+    ::view-transition-new(root) {
+      width: 100%;
+      height: 100%;
+      top: 0;
+      left: 0;
+    }
+  `
+  document.head.appendChild(style)
+}
+