footer {
    text-align: center;
    padding: 20px;
    background-color: #eee;
    color: #666;
    font-size: 0.9em;
}

/* 通用按钮 */
.more-btn {
    display: inline-block;
    padding: 8px 16px;
    background-color: #555;
    color: white;
    border-radius: 20px;
    text-decoration: none;
    font-size: 0.9em;
}

.more-btn:hover {
    background-color: #333;
}