div+css网站模版

/* 确保父元素有相对定位 */
.parent {
  position: relative;
}

/* 子元素使用绝对定位 */
.child {
  position: absolute;
  top: 0;
  left: 0;
}

/* 使用媒体查询实现响应式设计 */
@media (max-width: 600px) {
  .element {
    width: 100%;
  }
}

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Div+CSS 网站模板</title>
  <style>
    body {
      font-family: Arial, sans-serif;
    }
    .container {
      width: 80%;
      margin: 0 auto;
    }
    .header {
      background-color: #f1f1f1;
      padding: 20px;
      text-align: center;
    }
    .content {
      display: flex;
      justify-content: space-between;
    }
    .sidebar {
      width: 25%;
      background-color: #ddd;
      padding: 15px;
    }
    .main {
      width: 70%;
      padding: 15px;
    }
    @media (max-width: 600px) {
      .content {
        flex-direction: column;
      }
      .sidebar, .main {
        width: 100%;
      }
    }
  </style>
</head>
<body>
  <div class="container">
    <div class="header">
      <h1>网站标题</h1>
    </div>
    <div class="content">
      <div class="sidebar">
        <h2>侧边栏</h2>
        <p>这里是侧边栏内容。</p>
      </div>
      <div class="main">
        <h2>主要内容</h2>
        <p>这里是主要内容区域。</p>
      </div>
    </div>
  </div>
</body>
</html>