diff --git a/src/components/Demo.vue b/src/components/Demo.vue
index 3a0a0b9..5c13221 100644
--- a/src/components/Demo.vue
+++ b/src/components/Demo.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { useCounterStore } from '@/stores/counter';
+import { useCounterStore } from '@/stores/counter.ts';
 
 import { useDark, useToggle } from '@vueuse/core';
 const isDark = useDark();
@@ -20,6 +20,8 @@ const store = useCounterStore();
   </el-icon>
 
   <SvgIcon icon="lock"></SvgIcon>
+
+  <ChangeTheme />
 </template>
 
 <style scoped>
diff --git a/src/components/i18n/SelectLanguage.vue b/src/components/i18n/SelectLanguage.vue
new file mode 100644
index 0000000..f706394
--- /dev/null
+++ b/src/components/i18n/SelectLanguage.vue
@@ -0,0 +1,19 @@
+<template>
+  <el-dropdown trigger="click">
+    <SvgIcon pointer icon="language"></SvgIcon>
+    <template #dropdown>
+      <el-dropdown-menu>
+        <el-dropdown-item @click="changeLang('zh')">中文</el-dropdown-item>
+        <el-dropdown-item @click="changeLang('en')">English</el-dropdown-item>
+      </el-dropdown-menu>
+    </template>
+  </el-dropdown>
+</template>
+<script setup lang="ts">
+const { locale } = useI18n();
+const changeLang = (lang: string) => {
+  locale.value = lang;
+  localStorage.setItem('lang', lang);
+};
+</script>
+``
diff --git a/src/components/icon/SvgIcon.vue b/src/components/icon/SvgIcon.vue
new file mode 100644
index 0000000..ecd1f24
--- /dev/null
+++ b/src/components/icon/SvgIcon.vue
@@ -0,0 +1,33 @@
+<script setup lang="ts">
+const props = defineProps({
+  prefix: {
+    type: String,
+    default: 'icon',
+  },
+  icon: {
+    type: String,
+    required: true,
+  },
+  color: {
+    type: String,
+  },
+  size: {
+    type: Number,
+  },
+  pointer: {
+    type: Boolean,
+  },
+});
+
+const symbolId = computed(() => {
+  return `#${props.prefix}-${props.icon}`;
+});
+</script>
+
+<template>
+  <el-icon :size="size" :color="color" :style="props.pointer ? { cursor: 'pointer' } : {}">
+    <svg aria-hidden="true">
+      <use :xlink:href="symbolId" :fill="color" />
+    </svg>
+  </el-icon>
+</template>
diff --git a/src/components/icon/data.d.ts b/src/components/icon/data.d.ts
new file mode 100644
index 0000000..d41bdcc
--- /dev/null
+++ b/src/components/icon/data.d.ts
@@ -0,0 +1,8 @@
+declare namespace TYPE {
+  type SvgIconType = {
+    icon: string;
+    size?: number;
+    color?: string;
+    prefix?: string;
+  };
+}
diff --git a/src/components/icon/useSvgIcon.ts b/src/components/icon/useSvgIcon.ts
new file mode 100644
index 0000000..4e51179
--- /dev/null
+++ b/src/components/icon/useSvgIcon.ts
@@ -0,0 +1,6 @@
+import type { VNode } from 'vue';
+import SvgIcon from './SvgIcon.vue';
+
+export const useSvgIcon = (props: TYPE.SvgIconType): VNode => {
+  return h(SvgIcon, props);
+};
diff --git a/src/components/theme/ChangeTheme.vue b/src/components/theme/ChangeTheme.vue
new file mode 100644
index 0000000..933259b
--- /dev/null
+++ b/src/components/theme/ChangeTheme.vue
@@ -0,0 +1,66 @@
+<script setup lang="ts">
+import { useDark } from '@vueuse/core';
+import { useSvgIcon } from '../icon/useSvgIcon';
+const isDark = useDark();
+
+const darkIcon = useSvgIcon({ icon: 'dark', color: '#fde047' });
+const lightIcon = useSvgIcon({ icon: 'light', color: '#fde047' });
+
+// 添加动画效果
+function toggleTheme(event: MouseEvent) {
+  const isAppearanceTransition =
+    // @ts-expect-error 实验性质方法
+    document.startViewTransition &&
+    !window.matchMedia('(prefers-reduced-motion: reduce)').matches;
+  if (!isAppearanceTransition || !event) {
+    return;
+  }
+  const x = event.clientX;
+  const y = event.clientY;
+  const endRadius = Math.hypot(
+    Math.max(x, innerWidth - x),
+    Math.max(y, innerHeight - y)
+  );
+  // @ts-expect-error: Transition API
+  const transition = document.startViewTransition(async () => {
+    isDark.value = !isDark.value;
+    await nextTick();
+  });
+  transition.ready.then(() => {
+    const clipPath = [
+      `circle(0px at ${x}px ${y}px)`,
+      `circle(${endRadius}px at ${x}px ${y}px)`,
+    ];
+    document.documentElement.animate(
+      {
+        clipPath: isDark.value ? [...clipPath].reverse() : clipPath,
+      },
+      {
+        duration: 4500,
+        easing: 'ease-in',
+        pseudoElement: isDark.value
+          ? '::view-transition-old(root)'
+          : '::view-transition-new(root)',
+      }
+    );
+  });
+}
+</script>
+<!-- :border-color="blackColor"
+:active-color="blackColor" -->
+
+<template>
+  <el-switch
+    @click.stop="
+      (e:MouseEvent) => {
+        toggleTheme(e);
+      }
+    "
+    :before-change="() => false"
+    v-model="isDark"
+    inline-prompt
+    style="--el-switch-on-color: #13ce66; --el-switch-off-color: #a1a1a1"
+    :active-icon="darkIcon"
+    :inactive-icon="lightIcon"
+  ></el-switch>
+</template>
diff --git a/src/main.ts b/src/main.ts
index ad8bb63..90e078d 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -5,6 +5,7 @@ import { createMemoryHistory, createRouter } from 'vue-router';
 import App from './App.vue';
 import HelloWorld from './components/HelloWorld.vue';
 
+// 引入黑色主题
 import 'element-plus/theme-chalk/dark/css-vars.css';
 import Demo from './components/Demo.vue';
 import './style.css';
diff --git a/src/stores/global.ts b/src/stores/global.ts
new file mode 100644
index 0000000..c80de03
--- /dev/null
+++ b/src/stores/global.ts
@@ -0,0 +1,11 @@
+import { defineStore } from 'pinia';
+
+export const useGlobalStore = defineStore('global', () => {
+  const count = ref(0);
+  const doubleCount = computed(() => count.value * 2);
+  function increment() {
+    count.value++;
+  }
+
+  return { count, doubleCount, increment };
+});
diff --git a/src/style.css b/src/style.css
index bb131d6..9d61131 100644
--- a/src/style.css
+++ b/src/style.css
@@ -1,79 +1,110 @@
-:root {
-  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
+/* 清除 HTML 默认样式的 CSS Reset */
+*,
+*::before,
+*::after {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
+html {
+  /* 使字体大小在浏览器上更容易控制 */
+  font-size: 100%;
   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;
+body {
+  /* 确保 body 占满整个屏幕高度 */
+  min-height: 100vh;
+  text-rendering: optimizeSpeed;
   -webkit-font-smoothing: antialiased;
   -moz-osx-font-smoothing: grayscale;
 }
 
+img,
+picture,
+video,
+canvas,
+svg {
+  /* 确保多媒体元素不超过其容器 */
+  display: block;
+  max-width: 100%;
+}
+
+button,
+input,
+select,
+textarea {
+  /* 去除表单元素的默认样式，使用继承字体 */
+  font: inherit;
+}
+
 a {
-  font-weight: 500;
-  color: #646cff;
-  text-decoration: inherit;
-}
-a:hover {
-  color: #535bf2;
+  /* 清除链接的默认下划线和颜色 */
+  text-decoration: none;
+  color: inherit;
 }
 
-body {
-  margin: 0;
-  display: flex;
-  place-items: center;
-  min-width: 320px;
-  min-height: 100vh;
+ul,
+ol {
+  /* 清除列表的默认缩进和样式 */
+  list-style: none;
 }
 
-h1 {
-  font-size: 3.2em;
-  line-height: 1.1;
+table {
+  /* 确保表格的布局正确 */
+  border-collapse: collapse;
+  width: 100%;
+}
+
+/* 确保所有元素都有一致的外边距、填充和边界盒模型 */
+* {
+  box-sizing: inherit;
+}
+
+html {
+  /* 为所有浏览器设定一致的滚动行为 */
+  scroll-behavior: smooth;
 }
 
 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;
+  /* 去除按钮的默认边框 */
+  background: none;
+  border: none;
   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;
+blockquote,
+q {
+  /* 取消 blockquote 和 q 的默认引用样式 */
+  quotes: none;
 }
 
-#app {
-  max-width: 1280px;
-  margin: 0 auto;
-  padding: 2rem;
-  text-align: center;
+blockquote::before,
+blockquote::after,
+q::before,
+q::after {
+  content: '';
 }
 
-@media (prefers-color-scheme: light) {
-  :root {
-    color: #213547;
-    background-color: #ffffff;
-  }
-  a:hover {
-    color: #747bff;
-  }
-  button {
-    background-color: #f9f9f9;
-  }
+// 添加主题切换动画
+::view-transition-new(root),
+::view-transition-old(root) {
+  animation: none;
+  mix-blend-mode: normal;
+}
+
+::view-transition-old(root) {
+  z-index: 1;
+}
+
+::view-transition-new(root) {
+  z-index: 2147483646;
+}
+
+html.dark::view-transition-old(root) {
+  z-index: 2147483646;
+}
+html.dark::view-transition-new(root) {
+  z-index: 1;
 }
diff --git a/src/vite-env.d.ts b/src/vite-env.d.ts
index 11f02fe..5748c3e 100644
--- a/src/vite-env.d.ts
+++ b/src/vite-env.d.ts
@@ -1 +1,13 @@
 /// <reference types="vite/client" />
+
+/**
+ * 1.	/// <reference types="vite/client" />:
+	•	这行代码是一个三斜线指令，它告诉 TypeScript 编译器去引用 vite/client 的类型声明。
+	•	Vite 自带的 vite/client 模块中包含了 Vite 环境下常用的全局变量和工具的类型声明。比如：
+	•	import.meta: Vite 扩展了 ES Modules 中的 import.meta 对象，在 Vite 项目中有额外的属性如 import.meta.env，该属性中包含了一些 Vite 的环境变量。
+	•	import.meta.env: 通过它，你可以访问定义在 .env 文件或 VITE_ 前缀的自定义环境变量。这些变量在 vite/client 模块中有类型定义，能提供良好的开发体验和自动完成支持。
+	2.	vite-env.d.ts 文件的作用：
+	•	这是一个全局的类型声明文件，通常用于声明在整个项目中可以使用的全局类型。
+	•	该文件通常位于项目的根目录下，它使 TypeScript 知道 Vite 环境下的一些特殊语法（如 import.meta）以及任何自定义的全局类型。
+	•	这个文件的存在确保在使用 Vite 特定功能（例如动态导入、环境变量）时，不会出现 TypeScript 编译错误，并能获得相应的类型提示。
+ */