/* 全局样式 */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    color: #333;
}

nav {
    background-color: #333;
}

nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

nav ul li a:hover {
    background-color: #555;
}

section {
    padding: 40px;
    max-width: 800px;
    margin: 0 auto;
}

h2 {
    border-bottom: 1px solid #ccc;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

article {
    margin-bottom: 30px;
}

.date {
    font-style: italic;
    color: #777;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 10px;
}
footer a{
    color: white;
    text-decoration: none;
}