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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
        }

        header {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            padding: 2rem 0;
            margin-bottom: 3rem;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        h1 {
            font-size: 2.5rem;
            color: #667eea;
            text-align: center;
            font-weight: 700;
            letter-spacing: -0.5px;
        }

        .subtitle {
            text-align: center;
            color: #666;
            font-size: 1.1rem;
            margin-top: 0.5rem;
        }

        main {
            background: white;
            max-width: 1200px;
            margin: 0 auto 3rem;
            padding: 3rem;
            border-radius: 12px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
        }

        article {
            margin-bottom: 3rem;
        }

        article h2 {
            color: #764ba2;
            font-size: 1.8rem;
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-weight: 600;
        }

        article h3 {
            color: #667eea;
            font-size: 1.4rem;
            margin-top: 1.5rem;
            margin-bottom: 0.8rem;
            font-weight: 600;
        }

        article h4 {
            color: #555;
            font-size: 1.2rem;
            margin-top: 1.2rem;
            margin-bottom: 0.6rem;
            font-weight: 600;
        }

        article p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
            color: #444;
        }

        .transition-section {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            padding: 2.5rem;
            border-radius: 8px;
            margin-bottom: 3rem;
        }

        .transition-section p {
            font-size: 1.05rem;
            color: #333;
            margin-bottom: 1rem;
        }

        .links-section {
            background: #f8f9fa;
            padding: 2.5rem;
            border-radius: 8px;
            border-left: 4px solid #667eea;
        }

        .links-section h3 {
            color: #764ba2;
            font-size: 1.5rem;
            margin-bottom: 1.2rem;
            margin-top: 2rem;
            font-weight: 600;
        }

        .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 2rem;
            margin-bottom: 2rem;
        }

        .links-section li {
            padding-left: 1.5rem;
            position: relative;
        }

        .links-section li:before {
            content: "→";
            position: absolute;
            left: 0;
            color: #667eea;
            font-weight: bold;
        }

        .links-section a {
            color: #667eea;
            text-decoration: none;
            transition: color 0.3s ease;
            font-size: 1rem;
        }

        .links-section a:hover {
            color: #764ba2;
            text-decoration: underline;
        }

        footer {
            background: rgba(255, 255, 255, 0.95);
            padding: 2rem 0;
            text-align: center;
            color: #666;
            font-size: 0.9rem;
        }

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

            main {
                padding: 2rem 1.5rem;
                margin: 0 1rem 2rem;
            }

            .container {
                padding: 0 1rem;
            }

            article h2 {
                font-size: 1.5rem;
            }

            article h3 {
                font-size: 1.3rem;
            }

            .links-section ul {
                grid-template-columns: 1fr;
                gap: 0.8rem;
            }

            .transition-section {
                padding: 1.5rem;
            }

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

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

            main {
                padding: 1.5rem 1rem;
                margin: 0 0.5rem 1.5rem;
            }

            header {
                padding: 1.5rem 0;
                margin-bottom: 2rem;
            }
        }