* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.7;
    color: #333;
    background: #fff;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
}

.language-switch {
    text-align: right;
    margin-bottom: 24px;
}

.language-switch a {
    color: #0066cc;
    text-decoration: none;
    font-size: 14px;
    padding: 6px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.language-switch a:hover {
    background: #f5f5f5;
}

h1 {
    font-size: 28px;
    font-weight: 600;
    color: #000;
    margin-bottom: 12px;
}

.last-updated {
    color: #666;
    font-size: 14px;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid #e0e0e0;
}

.intro {
    font-size: 15px;
    color: #555;
    margin-bottom: 32px;
    line-height: 1.7;
}

h2 {
    font-size: 22px;
    font-weight: 600;
    color: #000;
    margin-top: 40px;
    margin-bottom: 16px;
}

h3 {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    margin-top: 24px;
    margin-bottom: 12px;
}

p {
    margin-bottom: 16px;
    font-size: 15px;
    line-height: 1.7;
}

ul {
    margin: 16px 0;
    padding-left: 28px;
}

li {
    margin-bottom: 10px;
    font-size: 15px;
    line-height: 1.7;
}

strong {
    font-weight: 600;
}

.footer {
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid #e0e0e0;
    text-align: center;
    color: #666;
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 12px;
    }
    
    .container {
        padding: 24px 16px;
    }
    
    h1 {
        font-size: 24px;
    }
    
    h2 {
        font-size: 20px;
        margin-top: 32px;
    }
    
    h3 {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 20px 12px;
    }
    
    h1 {
        font-size: 22px;
    }
    
    h2 {
        font-size: 18px;
    }
    
    h3 {
        font-size: 15px;
    }
    
    p, li {
        font-size: 14px;
    }
}

/* Print Styles */
@media print {
    .language-switch {
        display: none;
    }
    
    h2 {
        page-break-after: avoid;
    }
}