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    h1 {font-size:30px; color:#0b3d91; margin-bottom:6px;}
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    h3 {font-size:18px; color:#0b3d91; margin-top:20px;}
    p {margin:12px 0;}
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    .toc {background:#f3f7ff; padding:14px; border-left:4px solid #0b3d91; border-radius:8px;}
    .toc ul {padding-left:18px;}
    .toc a {color:#0b3d91; text-decoration:none;}
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    .note {background:#eef8ef; padding:10px; border-left:4px solid #36a64f; border-radius:6px;}
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    pre {background:#f4f7fb; padding:12px; border-radius:6px; overflow:auto;}