body {
    font-family: "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background: #f5f5f5;
}
header, footer {
    text-align: center;
    padding: 1rem;
    background: #333;
    color: #fff;
}
header h1 {
    margin: 0;
}
article {
    max-width: 800px;
    margin: 2rem auto;
    background: #fff;
    padding: 1.5rem;
    border-radius: 8px;
}
.article-list {
    list-style: none;
    padding: 0;
    max-width: 800px;
    margin: 2rem auto;
}
.article-list li {
    background: #fff;
    margin-bottom: 0.5rem;
    padding: 0.8rem;
    border-radius: 5px;
}
.article-list li a {
    text-decoration: none;
    color: #333;
    font-weight: bold;
}
.article-list li span {
    float: right;
    color: #999;
}
nav {
    text-align: center;
    margin-top: 1rem;
}
a {
    color: #1a73e8;
}