以下是一个简单的登录界面网页代码示例，使用HTML和CSS实现：
<!DOCTYPE html>
<html>
<head>
<title>Login Page</title>
<style>
body {
font-family: Arial, sans-serif;
background-color: #f2f2f2;
padding: 20px;
}
.container {
max-width: 400px;
margin: 0 auto;
background-color: #fff;
padding: 20px;
border-radius: 5px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
h2 {
text-align: center;
}
.form-group {
margin-bottom: 20px;
}
.form-group label {
display: block;
margin-bottom: 5px;
}
.form-group input {
width: 100%;
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
}
.form-group button {
width: 100%;
padding: 10px;
background-color: #4CAF50;
color: #fff;
border: none;
border-radius: 4px;
cursor: pointer;
}
</style>
</head>
<body>
<div class="container">
<h2>Login</h2>
<form>
<div class="form-group">
<label for="username">Username:</label>
<input type="text" id="username" name="username" required>
</div>
<div class="form-group">
<label for="password">Password:</label>
<input type="password" id="password" name="password" required>
</div>
<div class="form-group">
<button type="submit">Login</button>
</div>
</form>
</div>
</body>
</html>
