body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: 50px auto;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.page {
    display: none; /* 隐藏所有页面 */
}

.page.active {
    display: block; /* 仅显示活动页面 */
}

h1 {
    color: #333;
}

p, ul, ol {
    line-height: 1.6;
}

button {
    margin-top: 20px;
    padding: 10px 15px;
    border: none;
    background-color: #5cb85c;
    color: white;
    cursor: pointer;
    border-radius: 5px;
    font-size: 16px;
}

button:hover {
    background-color: #4cae4c;
}