body { font-family: Arial, sans-serif; line-height:1.6; margin:0 auto; padding:30px; max-width:960px; color:#222;}
    h1 { font-size:28px; color:#003366; margin-bottom:10px;}
    h2 { font-size:22px; color:#003366; margin-top:40px;}
    h3 { font-size:18px; color:#003366; margin-top:28px;}
    img { max-width:100%; height:auto; display:block; margin:20px 0; border-radius:8px;}
    .toc { background:#f4f8fc; padding:20px; border-left:4px solid #007acc; margin-bottom:30px; }
    .toc ul { list-style:none; padding-left:0; }
    .toc ul li { margin:8px 0; }
    a { color:#007acc; text-decoration:none; }
    a:hover { text-decoration:underline; }
    .internal-links { margin:30px 0; background:#f9f9f9; padding:15px; border-radius:6px;}