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

        body {
            font-family: 'Open Sans', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f5f5f5;
        }

        .container {
            max-width: 1140px;
            margin: 0 auto;
            padding: 0 20px;
        }

        header {
            background-color: #fff;
            padding: 30px 0;
            border-bottom: 3px solid #00a8e3;
            margin-bottom: 40px;
        }

        h1 {
            color: #2c3e50;
            font-size: 2.5em;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 3px solid #00a8e3;
            text-align: center;
        }

        article {
            background-color: #fff;
            padding: 40px;
            margin-bottom: 40px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            border-radius: 5px;
        }

        article p {
            margin-bottom: 20px;
            font-size: 15px;
            line-height: 1.7;
        }

        article h2 {
            color: #2c3e50;
            margin-top: 30px;
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 2px solid #e0e0e0;
        }

        article h3 {
            color: #34495e;
            margin-top: 25px;
            margin-bottom: 12px;
        }

        article h4 {
            color: #555;
            margin-top: 20px;
            margin-bottom: 10px;
        }

        .transition-section {
            background-color: #fff;
            padding: 35px 40px;
            margin-bottom: 40px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            border-radius: 5px;
            border-left: 5px solid #00a8e3;
        }

        .transition-section p {
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 15px;
        }

        .links-section {
            background-color: #fff;
            padding: 40px;
            margin-bottom: 40px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            border-radius: 5px;
        }

        .links-section h3 {
            color: #2c3e50;
            font-size: 1.4em;
            margin-top: 25px;
            margin-bottom: 20px;
            padding-bottom: 12px;
            border-bottom: 2px solid #00a8e3;
        }

        .links-section h3:first-child {
            margin-top: 0;
        }

        .links-section ul {
            list-style: none;
            column-count: 2;
            column-gap: 30px;
            margin-bottom: 30px;
        }

        .links-section li {
            break-inside: avoid;
            margin-bottom: 12px;
            padding-left: 20px;
            position: relative;
        }

        .links-section li:before {
            content: "›";
            position: absolute;
            left: 0;
            color: #00a8e3;
            font-weight: bold;
            font-size: 1.3em;
        }

        .links-section a {
            color: #00a8e3;
            text-decoration: none;
            transition: color 0.3s ease;
            font-size: 15px;
        }

        .links-section a:hover {
            color: #0077a3;
            text-decoration: underline;
        }

        footer {
            background-color: #2c3e50;
            color: #ecf0f1;
            padding: 30px 0;
            margin-top: 60px;
            text-align: center;
        }

        footer p {
            font-size: 14px;
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 2em;
            }

            article, .transition-section, .links-section {
                padding: 25px;
            }

            .links-section ul {
                column-count: 1;
            }

            article p, .transition-section p, .links-section a {
                font-size: 14px;
            }
        }

        @media (max-width: 480px) {
            h1 {
                font-size: 1.6em;
            }

            article, .transition-section, .links-section {
                padding: 20px;
            }

            header {
                padding: 20px 0;
            }
        }