body {
    margin: 0;
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    background-color: #f7f9fc;
    color: #333;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    height: 100vh;
    padding: 0 20px;
    user-select: none;
}
h1 {
    font-size: 48px;
    color: #e74c3c;
    margin-bottom: 10px;
}
p {
    font-size: 18px;
    margin: 5px 0 20px;
}
a {
    display: inline-block;
    padding: 10px 20px;
    background-color: #3498db;
    color: #fff;
    text-decoration: none;
    border-radius: 6px;
    transition: background-color 0.3s;
}
a:hover {
    background-color: #217dbb;
}
a:active {
    background-color: #217dbb;
}
footer {
    font-size: 14px;
    color: #888;
    margin-top: 30px;
}