登录页面美化 css

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>登录页面</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            background-color: #f4f4f4;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
        }
        .login-container {
            background-color: #fff;
            padding: 40px;
            border-radius: 8px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
            width: 300px;
        }
        .login-container h2 {
            margin-bottom: 30px;
            text-align: center;
            color: #333;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 5px;
            color: #555;
        }
        .form-group input {
            width: 100%;
            padding: 10px;
            border: 1px solid #ccc;
            border-radius: 4px;
        }
        .form-group input:focus {
            border-color: #007bff;
            outline: none;
        }
        .btn-login {
            width: 100%;
            padding: 10px;
            background-color: #007bff;
            border: none;
            border-radius: 4px;
            color: #fff;
            font-size: 16px;
            cursor: pointer;
        }
        .btn-login:hover {
            background-color: #0056b3;
        }
    </style>
</head>
<body>
    <div class="login-container">
        <h2>登录</h2>
        <div class="form-group">
            <label for="username">用户名</label>
            <input type="text" id="username" name="username">
        </div>
        <div class="form-group">
            <label for="password">密码</label>
            <input type="password" id="password" name="password">
        </div>
        <button class="btn-login">登录</button>
    </div>
</body>
</html>