web前端float布局、flex布局

1、float布局

<!DOCTYPE html>
<html>
<head>
  <title>Login Page</title>
  <style>
    body {
      font-family: Arial, sans-serif;
      background-color: #f3f3f3;
    }
    
    .container {
      max-width: 400px;
      margin: 0 auto;
      padding: 40px;
      background-color: #fff;
      border-radius: 5px;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
    }
    
    .form-group {
      margin-bottom: 20px;
    }
    
    .form-group label {
      display: block;
      margin-bottom: 5px;
      font-weight: bold;
    }
    
    .form-group input {
      width: 100%;
      padding: 10px;
      font-size: 16px;
      border-radius: 5px;
      border: 1px solid #ddd;
    }
    
    .form-group button {
      width: 100%;
      padding: 10px;
      font-size: 16px;
      border-radius: 5px;
      background-color: #4caf50;
      color: #fff;
      border: none;
    }
    
    .form-group button:hover {
      background-color: #45a049;
    }
  </style>
</head>
<body>
  <div class="container">
    <h1>Login</h1>
    <form>
      <div class="form-group">
        <label for="username">Username:</label>
        <input type="text" id="username" name="username" placeholder="Enter your username">
      </div>
      <div class="form-group">
        <label for="password">Password:</label>
        <input type="password" id="password" name="password" placeholder="Enter your password">
      </div>
      <div class="form-group">
        <button type="submit">Login</button>
      </div>
    </form>
  </div>
</body>
</html>

展示效果

2、flex布局

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Flex布局页面</title>
    <style>
        body {
            margin: 0;
            padding: 0;
            font-family: Arial, sans-serif;
        }

        .container {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-height: 100vh;
        }

        .header {
            background-color: #3498db;
            color: #fff;
            padding: 20px;
            text-align:
 center;
        }

        .content {
            flex: 1;
            padding: 20px;
            text-align: center;
        }

        .footer {
            background-color: #333;
            color: #fff;
            padding: 10px;
            text-align: center;
        }
    </style>
</head>
<body>
    <div class="container">
        <header class="header">
            <h1>网页标题</h1>
        </header>
        <main class="content">
            <p>这是页面的主要内容。使用Flex布局可以轻松实现垂直居中和响应式布局。</p>
        </main>
        <footer class="footer">
            <p>页脚信息 © 2023</p>
        </footer>
    </div>
</body>
</html>

运行结果

文章来源地址https://uudwc.com/A/zkrZ3