/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    background-color: #f5f5f5;
    color: #333;
    padding: 10px;
}

header {
    text-align: center;
    padding: 15px 0;
    margin-bottom: 20px;
    border-bottom: 1px solid #ddd;
}

header h1 {
    font-size: 24px;
    margin-bottom: 10px;
}

header a {
    color: #0066cc;
    text-decoration: none;
}

#nav-container {
    max-width: 600px;
    margin: 0 auto;
}

.loading {
    text-align: center;
    padding: 20px;
    color: #666;
}

.category-title {
    font-size: 18px;
    margin: 15px 0 10px;
    color: #333;
    padding-left: 5px;
    border-left: 3px solid #0066cc;
}

.link-list {
    margin-bottom: 20px;
    overflow: hidden;
}

.site-link {
    display: block;
    background-color: white;
    padding: 12px;
    margin-bottom: 8px;
    border-radius: 4px;
    text-decoration: none;
    color: #333;
    border: 1px solid #ddd;
}

.site-link:hover {
    background-color: #f0f7ff;
    border-color: #0066cc;
}

.site-name {
    font-weight: bold;
    font-size: 17px;
    margin-bottom: 3px;
}

.site-desc {
    font-size: 14px;
    color: #666;
}

footer {
    text-align: center;
    margin-top: 30px;
    padding: 15px 0;
    font-size: 14px;
    color: #666;
    border-top: 1px solid #ddd;
}

footer a {
    color: #0066cc;
    text-decoration: none;
}