diff --git a/index.js b/index.js
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index 0000000..f65933c
--- /dev/null
+++ b/index.js
@@ -0,0 +1,323 @@
+< !DOCTYPE html >
+  <html lang="zh-CN">
+    <head>
+      <meta charset="UTF-8">
+        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+          <title>Index.js 示例应用</title>
+          <style>
+            * {
+              margin: 0;
+            padding: 0;
+            box-sizing: border-box;
+            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
+        }
+
+            body {
+              background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
+            color: #fff;
+            min-height: 100vh;
+            padding: 20px;
+        }
+
+            .container {
+              max - width: 1200px;
+            margin: 0 auto;
+        }
+
+            header {
+              text - align: center;
+            padding: 30px 0;
+            margin-bottom: 40px;
+        }
+
+            h1 {
+              font - size: 2.8rem;
+            margin-bottom: 10px;
+            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
+        }
+
+            .subtitle {
+              font - size: 1.2rem;
+            opacity: 0.9;
+        }
+
+            .card-container {
+              display: grid;
+            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
+            gap: 25px;
+            margin-bottom: 40px;
+        }
+
+            .card {
+              background: rgba(255, 255, 255, 0.1);
+            backdrop-filter: blur(10px);
+            border-radius: 15px;
+            padding: 25px;
+            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
+            transition: transform 0.3s ease, box-shadow 0.3s ease;
+        }
+
+            .card:hover {
+              transform: translateY(-5px);
+            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
+        }
+
+            .card h2 {
+              font - size: 1.5rem;
+            margin-bottom: 15px;
+            display: flex;
+            align-items: center;
+            gap: 10px;
+        }
+
+            .card h2 i {
+              font - size: 1.8rem;
+        }
+
+            .card p {
+              line - height: 1.6;
+            margin-bottom: 20px;
+        }
+
+            .btn {
+              display: inline-block;
+            background: #ff6b6b;
+            color: white;
+            padding: 10px 20px;
+            border-radius: 50px;
+            text-decoration: none;
+            font-weight: 600;
+            transition: all 0.3s ease;
+            border: none;
+            cursor: pointer;
+        }
+
+            .btn:hover {
+              background: #ff5252;
+            transform: scale(1.05);
+        }
+
+            .demo-area {
+              background: rgba(255, 255, 255, 0.1);
+            backdrop-filter: blur(10px);
+            border-radius: 15px;
+            padding: 30px;
+            margin-top: 30px;
+            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
+        }
+
+            .demo-area h2 {
+              margin - bottom: 20px;
+            font-size: 1.8rem;
+        }
+
+            .counter {
+              display: flex;
+            align-items: center;
+            justify-content: center;
+            gap: 20px;
+            margin-bottom: 30px;
+        }
+
+            .counter button {
+              width: 50px;
+            height: 50px;
+            border-radius: 50%;
+            font-size: 1.5rem;
+            display: flex;
+            align-items: center;
+            justify-content: center;
+        }
+
+            .counter span {
+              font - size: 2.5rem;
+            font-weight: bold;
+            min-width: 80px;
+            text-align: center;
+        }
+
+            .user-list {
+              display: grid;
+            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
+            gap: 15px;
+            margin-top: 20px;
+        }
+
+            .user-card {
+              background: rgba(255, 255, 255, 0.15);
+            padding: 15px;
+            border-radius: 10px;
+            text-align: center;
+        }
+
+            .user-card img {
+              width: 60px;
+            height: 60px;
+            border-radius: 50%;
+            margin-bottom: 10px;
+            object-fit: cover;
+        }
+
+            .user-card h3 {
+              font - size: 1rem;
+            margin-bottom: 5px;
+        }
+
+            .user-card p {
+              font - size: 0.8rem;
+            opacity: 0.8;
+        }
+
+            footer {
+              text - align: center;
+            margin-top: 50px;
+            padding: 20px;
+            font-size: 0.9rem;
+            opacity: 0.8;
+        }
+
+            @media (max-width: 768px) {
+              h1 {
+              font - size: 2.2rem;
+            }
+
+            .card-container {
+              grid - template - columns: 1fr;
+            }
+        }
+          </style>
+        </head>
+        <body>
+          <div class="container">
+            <header>
+              <h1>Index.js 示例应用</h1>
+              <p class="subtitle">展示现代JavaScript在前端开发中的强大功能</p>
+            </header>
+
+            <div class="card-container">
+              <div class="card">
+                <h2><i>📁</i> 模块化开发</h2>
+                <p>使用ES6模块系统组织代码，提高可维护性和复用性。</p>
+                <button class="btn" onclick="showModuleExample()">查看示例</button>
+              </div>
+
+              <div class="card">
+                <h2><i>🔄</i> 异步操作</h2>
+                <p>使用async/await和Promise处理异步操作，提高代码可读性。</p>
+                <button class="btn" onclick="showAsyncExample()">查看示例</button>
+              </div>
+
+              <div class="card">
+                <h2><i>🎯</i> DOM操作</h2>
+                <p>使用现代JavaScript高效操作DOM，创建动态用户界面。</p>
+                <button class="btn" onclick="showDOMExample()">查看示例</button>
+              </div>
+            </div>
+
+            <div class="demo-area">
+              <h2>JavaScript功能演示</h2>
+              <div class="counter">
+                <button class="btn" onclick="decrement()">-</button>
+                <span id="count">0</span>
+                <button class="btn" onclick="increment()">+</button>
+              </div>
+
+              <button class="btn" onclick="fetchUsers()">加载用户数据</button>
+
+              <div id="user-list" class="user-list">
+                <!-- 用户数据将在这里显示 -->
+              </div>
+            </div>
+
+            <footer>
+              <p>Index.js 示例应用 &copy; 2023 | 展示现代JavaScript开发实践</p>
+            </footer>
+          </div>
+
+          <script>
+        // 计数器状态
+            let count = 0;
+
+            // DOM元素引用
+            const countElement = document.getElementById('count');
+            const userListElement = document.getElementById('user-list');
+
+            // 计数器功能
+            function increment() {
+              count++;
+            updateCountDisplay();
+        }
+
+            function decrement() {
+              count--;
+            updateCountDisplay();
+        }
+
+            function updateCountDisplay() {
+              countElement.textContent = count;
+            // 添加动画效果
+            countElement.style.transform = 'scale(1.2)';
+            setTimeout(() => {
+              countElement.style.transform = 'scale(1)';
+            }, 200);
+        }
+
+            // 异步获取用户数据
+            async function fetchUsers() {
+            try {
+              userListElement.innerHTML = '<p>加载中...</p>';
+
+            // 使用公共API获取随机用户数据
+            const response = await fetch('https://jsonplaceholder.typicode.com/users');
+            const users = await response.json();
+
+            displayUsers(users.slice(0, 6)); // 只显示前6个用户
+            } catch (error) {
+              userListElement.innerHTML = '<p>加载用户数据时出错</p>';
+            console.error('Error fetching users:', error);
+            }
+        }
+
+            // 显示用户数据
+            function displayUsers(users) {
+              userListElement.innerHTML = '';
+            
+            users.forEach(user => {
+                const userCard = document.createElement('div');
+            userCard.className = 'user-card';
+
+            // 生成随机头像（使用占位符服务）
+            const randomId = Math.floor(Math.random() * 100);
+            const avatarUrl = `https://i.pravatar.cc/100?img=${randomId}`;
+
+            userCard.innerHTML = `
+            <img src="${avatarUrl}" alt="${user.name}">
+              <h3>${user.name}</h3>
+              <p>${user.email}</p>
+              `;
+
+              userListElement.appendChild(userCard);
+            });
+        }
+
+              // 示例功能
+              function showModuleExample() {
+                alert('模块化示例：\n\n// math.js\nexport function add(a, b) {\n  return a + b;\n}\n\n// index.js\nimport { add } from \'./math.js\';\nconsole.log(add(2, 3)); // 5');
+        }
+
+              function showAsyncExample() {
+                alert('异步操作示例：\n\nasync function fetchData() {\n  try {\n    const response = await fetch(\'api/data\');\n    const data = await response.json();\n    return data;\n  } catch (error) {\n    console.error(\'Error:\', error);\n  }\n}');
+        }
+
+              function showDOMExample() {
+                alert('DOM操作示例：\n\n// 创建元素\nconst newElement = document.createElement(\'div\');\nnewElement.textContent = \'Hello World!\';\n\n// 添加到DOM\ndocument.body.appendChild(newElement);\n\n// 事件监听\nnewElement.addEventListener(\'click\', () => {\n  alert(\'元素被点击了!\');\n});');
+        }
+
+        // 初始化
+        document.addEventListener('DOMContentLoaded', () => {
+                updateCountDisplay();
+              console.log('Index.js 示例应用已加载完成!');
+        });
+          </script>
+        </body>
+      </html>
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