body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

/* 导航栏 */
nav {
    background: #333;
    padding: 10px;
    text-align: center;
}

nav ul {
    list-style: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
}

/* 内容样式 */
.container {
    max-width: 800px;
    margin: 50px auto;
    padding: 20px;
    text-align: center;
}

h1 {
    color: #333;
}

p {
    font-size: 18px;
    color: #555;
}