* {
            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: #f5f5f5;
            background-image: repeating-linear-gradient(90deg, #f5f5f5 0px, #f5f5f5 2px, #fafafa 2px, #fafafa 4px);
        }

        header {
            background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
            padding: 2rem 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

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

        h1 {
            color: #fff;
            font-size: 2.5rem;
            font-weight: 300;
            letter-spacing: 1px;
            text-align: left;
        }

        main {
            max-width: 1200px;
            margin: 3rem auto;
            padding: 0 2rem;
        }

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

        article h2 {
            color: #2c3e50;
            font-size: 2rem;
            margin-bottom: 1.5rem;
            font-weight: 400;
            border-bottom: 3px solid #3498db;
            padding-bottom: 0.5rem;
        }

        article h3 {
            color: #34495e;
            font-size: 1.5rem;
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-weight: 400;
        }

        article h4 {
            color: #34495e;
            font-size: 1.2rem;
            margin-top: 1.5rem;
            margin-bottom: 0.8rem;
            font-weight: 400;
        }

        article p {
            margin-bottom: 1.2rem;
            text-align: justify;
            color: #555;
        }

        .transition-section {
            background: #fff;
            padding: 2.5rem 3rem;
            margin-bottom: 3rem;
            border-radius: 8px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.08);
            border-left: 5px solid #3498db;
        }

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

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

        .links-section h3 {
            color: #2c3e50;
            font-size: 1.6rem;
            margin-top: 2rem;
            margin-bottom: 1.2rem;
            font-weight: 400;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #ecf0f1;
        }

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

        .links-section ul {
            list-style: none;
            column-count: 2;
            column-gap: 3rem;
            margin-bottom: 2rem;
        }

        .links-section li {
            margin-bottom: 0.8rem;
            break-inside: avoid;
            page-break-inside: avoid;
        }

        .links-section a {
            color: #3498db;
            text-decoration: none;
            transition: all 0.3s ease;
            display: inline-block;
            padding: 0.3rem 0;
            position: relative;
        }

        .links-section a:hover {
            color: #2980b9;
            padding-left: 0.5rem;
        }

        .links-section a::before {
            content: "→";
            position: absolute;
            left: -1.2rem;
            opacity: 0;
            transition: all 0.3s ease;
        }

        .links-section a:hover::before {
            opacity: 1;
            left: -0.2rem;
        }

        footer {
            background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
            color: #ecf0f1;
            text-align: center;
            padding: 2rem;
            margin-top: 4rem;
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 1.8rem;
            }

            article {
                padding: 2rem 1.5rem;
            }

            article h2 {
                font-size: 1.6rem;
            }

            article h3 {
                font-size: 1.3rem;
            }

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

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

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

            .links-section h3 {
                font-size: 1.4rem;
            }

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

        @media (max-width: 480px) {
            h1 {
                font-size: 1.5rem;
            }

            header {
                padding: 1.5rem 0;
            }

            article {
                padding: 1.5rem 1rem;
            }

            article h2 {
                font-size: 1.4rem;
            }

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

            .transition-section {
                padding: 1.2rem 1rem;
            }
        }