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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f8f8;
        }

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

        header {
            background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
            color: #fff;
            padding: 60px 20px 40px;
            text-align: center;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

        h1 {
            font-size: 2.5rem;
            font-weight: 300;
            letter-spacing: 2px;
            margin-bottom: 10px;
            text-transform: uppercase;
        }

        article {
            background: #fff;
            padding: 50px 20px;
            margin: 40px auto;
            max-width: 1200px;
            box-shadow: 0 0 20px rgba(0,0,0,0.08);
            border-radius: 8px;
        }

        article h2 {
            color: #2c3e50;
            font-size: 2rem;
            margin-top: 30px;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid #34495e;
            font-weight: 400;
        }

        article h3 {
            color: #34495e;
            font-size: 1.5rem;
            margin-top: 25px;
            margin-bottom: 15px;
            font-weight: 500;
        }

        article h4 {
            color: #555;
            font-size: 1.2rem;
            margin-top: 20px;
            margin-bottom: 12px;
            font-weight: 500;
        }

        article p {
            margin-bottom: 20px;
            font-size: 1.05rem;
            line-height: 1.8;
            color: #555;
        }

        article p:first-of-type {
            font-size: 1.15rem;
            color: #444;
        }

        .transition-section {
            background: #fff;
            padding: 40px 20px;
            margin: 40px auto;
            max-width: 1200px;
            box-shadow: 0 0 20px rgba(0,0,0,0.08);
            border-radius: 8px;
        }

        .transition-section p {
            font-size: 1.05rem;
            line-height: 1.8;
            color: #555;
            margin-bottom: 20px;
        }

        .links-section {
            background: #fff;
            padding: 50px 20px;
            margin: 40px auto;
            max-width: 1200px;
            box-shadow: 0 0 20px rgba(0,0,0,0.08);
            border-radius: 8px;
        }

        .links-section h2 {
            color: #2c3e50;
            font-size: 2rem;
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 3px solid #34495e;
            font-weight: 400;
        }

        .links-section h3 {
            color: #34495e;
            font-size: 1.4rem;
            margin-top: 35px;
            margin-bottom: 20px;
            font-weight: 500;
        }

        .links-section ul {
            list-style: none;
            column-count: 2;
            column-gap: 40px;
            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: #34495e;
            font-weight: bold;
        }

        .links-section a {
            color: #2c3e50;
            text-decoration: none;
            transition: color 0.3s ease;
            font-size: 1.05rem;
            line-height: 1.6;
        }

        .links-section a:hover {
            color: #3498db;
            text-decoration: underline;
        }

        footer {
            background: #2c3e50;
            color: #ecf0f1;
            text-align: center;
            padding: 30px 20px;
            margin-top: 60px;
        }

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

            header {
                padding: 40px 20px 30px;
            }

            article {
                padding: 30px 20px;
                margin: 20px auto;
            }

            article h2 {
                font-size: 1.6rem;
            }

            article h3 {
                font-size: 1.3rem;
            }

            article h4 {
                font-size: 1.1rem;
            }

            article p {
                font-size: 1rem;
            }

            .transition-section {
                padding: 30px 20px;
                margin: 20px auto;
            }

            .links-section {
                padding: 30px 20px;
                margin: 20px auto;
            }

            .links-section h2 {
                font-size: 1.6rem;
            }

            .links-section h3 {
                font-size: 1.2rem;
                margin-top: 25px;
            }

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

            .links-section a {
                font-size: 1rem;
            }
        }

        @media (max-width: 480px) {
            h1 {
                font-size: 1.6rem;
                letter-spacing: 1px;
            }

            article h2 {
                font-size: 1.4rem;
            }

            article h3 {
                font-size: 1.2rem;
            }

            .links-section h2 {
                font-size: 1.4rem;
            }

            .links-section h3 {
                font-size: 1.1rem;
            }
        }