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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }

        header {
            background-color: #fff;
            border-bottom: 3px solid #1a1a1a;
            padding: 1.5rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }

        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: #1a1a1a;
            text-decoration: none;
        }

        nav {
            display: flex;
            gap: 2rem;
        }

        nav a {
            color: #333;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s ease;
            padding: 0.5rem 0;
        }

        nav a:hover {
            color: #0066cc;
        }

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

        .hero {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: #fff;
            padding: 4rem 2rem;
            margin-bottom: 3rem;
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            margin-bottom: 1rem;
            line-height: 1.2;
        }

        article {
            background-color: #fff;
            padding: 3rem;
            margin-bottom: 3rem;
            border-radius: 8px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.08);
        }

        article h2 {
            font-size: 2rem;
            margin-top: 2rem;
            margin-bottom: 1rem;
            color: #1a1a1a;
            font-weight: 700;
        }

        article h3 {
            font-size: 1.5rem;
            margin-top: 1.5rem;
            margin-bottom: 0.75rem;
            color: #333;
            font-weight: 600;
        }

        article h4 {
            font-size: 1.25rem;
            margin-top: 1.25rem;
            margin-bottom: 0.5rem;
            color: #444;
            font-weight: 600;
        }

        article p {
            margin-bottom: 1.25rem;
            font-size: 1.1rem;
            color: #555;
            line-height: 1.8;
        }

        article ul, article ol {
            margin-bottom: 1.25rem;
            margin-left: 2rem;
        }

        article li {
            margin-bottom: 0.5rem;
            color: #555;
            line-height: 1.7;
        }

        .transition-section {
            background-color: #fff;
            padding: 2.5rem 3rem;
            margin-bottom: 3rem;
            border-radius: 8px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.08);
            border-left: 4px solid #667eea;
        }

        .transition-section p {
            font-size: 1.1rem;
            color: #555;
            line-height: 1.8;
            margin-bottom: 1rem;
        }

        .links-section {
            background-color: #fff;
            padding: 3rem;
            margin-bottom: 3rem;
            border-radius: 8px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.08);
        }

        .links-section h3 {
            font-size: 1.75rem;
            margin-bottom: 1.5rem;
            color: #1a1a1a;
            font-weight: 700;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #667eea;
        }

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 0.75rem 2rem;
            margin-bottom: 2.5rem;
        }

        .links-section li {
            margin: 0;
        }

        .links-section a {
            color: #0066cc;
            text-decoration: none;
            font-size: 1.05rem;
            transition: all 0.3s ease;
            display: inline-block;
            padding: 0.4rem 0;
            position: relative;
        }

        .links-section a::before {
            content: '→';
            margin-right: 0.5rem;
            transition: margin 0.3s ease;
        }

        .links-section a:hover {
            color: #004999;
            padding-left: 0.5rem;
        }

        .links-section a:hover::before {
            margin-right: 0.75rem;
        }

        footer {
            background-color: #1a1a1a;
            color: #fff;
            padding: 3rem 2rem;
            margin-top: 4rem;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            text-align: center;
        }

        .footer-content p {
            font-size: 0.95rem;
            color: #ccc;
            margin-bottom: 0.5rem;
        }

        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                gap: 1rem;
            }

            nav {
                flex-direction: column;
                gap: 0.75rem;
                text-align: center;
            }

            .hero h1 {
                font-size: 2rem;
            }

            article, .transition-section, .links-section {
                padding: 2rem 1.5rem;
            }

            article h2 {
                font-size: 1.5rem;
            }

            article h3 {
                font-size: 1.25rem;
            }

            .links-section ul {
                grid-template-columns: 1fr;
                gap: 0.5rem;
            }

            .container {
                padding: 0 1rem;
            }
        }

        @media (max-width: 480px) {
            .hero {
                padding: 2.5rem 1.5rem;
            }

            .hero h1 {
                font-size: 1.75rem;
            }

            article, .transition-section, .links-section {
                padding: 1.5rem 1rem;
            }

            article p, .transition-section p {
                font-size: 1rem;
            }
        }