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

        body {
            font-family: Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f4f4f4;
        }

        header {
            background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
            color: white;
            padding: 2rem 0;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }

        .header-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        h1 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }

        article {
            background: white;
            padding: 2.5rem;
            margin: 2rem 0;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.08);
        }

        article h2 {
            color: #2c3e50;
            font-size: 1.8rem;
            margin: 2rem 0 1rem 0;
        }

        article h3 {
            color: #34495e;
            font-size: 1.4rem;
            margin: 1.5rem 0 0.8rem 0;
        }

        article h4 {
            color: #34495e;
            font-size: 1.2rem;
            margin: 1.2rem 0 0.6rem 0;
        }

        article p {
            margin-bottom: 1.2rem;
            color: #555;
            font-size: 1rem;
        }

        article ul, article ol {
            margin: 1rem 0 1rem 2rem;
        }

        article li {
            margin-bottom: 0.5rem;
            color: #555;
        }

        .transition-section {
            background: white;
            padding: 2rem;
            margin: 2rem 0;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.08);
        }

        .transition-section p {
            color: #555;
            margin-bottom: 1rem;
            font-size: 1rem;
        }

        .links-section {
            background: white;
            padding: 2.5rem;
            margin: 2rem 0;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.08);
        }

        .links-section h3 {
            color: #2c3e50;
            font-size: 1.5rem;
            margin-top: 1.5rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #3498db;
        }

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

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 0.8rem;
            margin-bottom: 2rem;
        }

        .links-section li {
            margin: 0;
        }

        .links-section a {
            color: #2c3e50;
            text-decoration: none;
            padding: 0.5rem 0;
            display: block;
            transition: color 0.3s ease, padding-left 0.3s ease;
            position: relative;
            padding-left: 1.2rem;
        }

        .links-section a:before {
            content: "›";
            position: absolute;
            left: 0;
            color: #3498db;
            font-weight: bold;
            font-size: 1.2rem;
        }

        .links-section a:hover {
            color: #3498db;
            padding-left: 1.5rem;
        }

        footer {
            background: #2c3e50;
            color: white;
            text-align: center;
            padding: 2rem 0;
            margin-top: 3rem;
        }

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

            article {
                padding: 1.5rem;
            }

            article h2 {
                font-size: 1.5rem;
            }

            article h3 {
                font-size: 1.2rem;
            }

            .links-section ul {
                grid-template-columns: 1fr;
            }

            .links-section {
                padding: 1.5rem;
            }

            .transition-section {
                padding: 1.5rem;
            }
        }

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

            header {
                padding: 1.5rem 0;
            }

            article {
                padding: 1.2rem;
            }

            .container {
                padding: 10px;
            }
        }