body {
            font-family: 'Arial', sans-serif;
            line-height: 1.6;
            color: #333;
            margin: 0;
            padding: 0;
            background-color: #f9f9f9;
        }
        main {
            padding-top: 80px;
            padding-bottom: 40px;
        }
        .container {
            max-width: 1140px;
            margin: 0 auto;
            padding: 0 20px;
        }
        h1 {
            color: #0d4d80;
            border-bottom: 2px solid #0d4d80;
            padding-bottom: 10px;
            font-size: 2.2em;
        }
        h2 {
            color: #0d4d80;
            margin-top: 30px;
            font-size: 1.6em;
        }
        .section {
            background-color: #fff;
            padding: 25px;
            margin-bottom: 20px;
            border-radius: 5px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
        }
        .date-info {
            font-style: italic;
            color: #666;
            margin-bottom: 30px;
        }
        .toc {
            background-color: #f0f5fa;
            padding: 15px 25px;
            border-radius: 5px;
            margin-bottom: 30px;
        }
        .toc ul {
            list-style-type: none;
            padding-left: 10px;
        }
        .toc li {
            margin-bottom: 8px;
        }
        .toc a {
            text-decoration: none;
            color: #0d4d80;
        }
        .toc a:hover {
            text-decoration: underline;
        }
        .important {
            background-color: #f8f9fa;
            border-left: 4px solid #0d4d80;
            padding: 10px 15px;
            margin: 15px 0;
        }