:root {  /* 颜色变量定义 */
    --bg-color: #f8f9fa;
    --text-color: #333;
    --link-color: #228ae6;
    --link-hover: #1b6ec2;
    --date-color: #868e96;
    --border-color: #dee2e6;
}
.site-header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}
h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: #212529;
}
.description {
    color: var(--date-color);
    font-size: 1.1rem;
}
body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: 20px;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}
.nav-links {
            margin-top: 1rem;
        }
        .nav-links a {
            color: var(--link-color);
            text-decoration: none;
            margin: 0 10px;
            font-size: 1.1rem;
            font-weight: bold;
            transition: color 0.2s;
        }
        .nav-links a:hover {
            color: var(--link-hover);
        }
.post-list {
    list-style: none;
    padding: 0;
}
.post-item {
    margin-bottom: 1.5rem;
    display: flex;
    align-items: baseline;
    gap: 1.5rem;
}
.post-date {
    color: var(--date-color);
    font-size: 0.9rem;
    min-width: 100px;
    font-family: monospace;
}
.post-link {
    color: var(--link-color);
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 500;
    transition: color 0.2s;
}
    .post-link:hover {
        color: var(--link-hover);
        text-decoration: none;
    }