* {
            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: #f5f5f5;
            padding: 20px;
        }

        h1 {
            font-size: 2.5rem;
            font-weight: 300;
            text-align: center;
            margin: 40px 0 60px 0;
            color: #222;
            letter-spacing: 2px;
        }

        article {
            max-width: 800px;
            margin: 0 auto 60px auto;
            background: #fff;
            padding: 40px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }

        article h2 {
            font-size: 1.8rem;
            font-weight: 400;
            margin: 30px 0 15px 0;
            color: #222;
        }

        article h3 {
            font-size: 1.4rem;
            font-weight: 400;
            margin: 25px 0 12px 0;
            color: #333;
        }

        article p {
            margin-bottom: 20px;
            text-align: justify;
            color: #555;
        }

        section {
            max-width: 800px;
            margin: 0 auto 40px auto;
            background: #fff;
            padding: 40px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }

        section p {
            margin-bottom: 20px;
            color: #555;
            line-height: 1.8;
        }

        .links-section {
            max-width: 900px;
            margin: 60px auto;
            background: #fff;
            padding: 50px 40px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }

        .links-section h3 {
            font-size: 1.5rem;
            font-weight: 400;
            margin: 30px 0 20px 0;
            color: #222;
            border-bottom: 2px solid #eee;
            padding-bottom: 10px;
        }

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

        .links-section ul {
            list-style: none;
            columns: 2;
            column-gap: 40px;
            margin-bottom: 30px;
        }

        .links-section li {
            margin-bottom: 12px;
            break-inside: avoid;
        }

        .links-section a {
            color: #0066cc;
            text-decoration: none;
            transition: color 0.2s ease;
            display: inline-block;
        }

        .links-section a:hover {
            color: #004499;
            text-decoration: underline;
        }

        @media (max-width: 768px) {
            body {
                padding: 15px;
            }

            h1 {
                font-size: 2rem;
                margin: 30px 0 40px 0;
            }

            article {
                padding: 30px 25px;
            }

            section {
                padding: 30px 25px;
            }

            .links-section {
                padding: 40px 25px;
            }

            .links-section ul {
                columns: 1;
            }

            article h2 {
                font-size: 1.5rem;
            }

            article h3 {
                font-size: 1.2rem;
            }

            .links-section h3 {
                font-size: 1.3rem;
            }
        }

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

            article {
                padding: 20px 15px;
            }

            section {
                padding: 20px 15px;
            }

            .links-section {
                padding: 30px 15px;
            }
        }