* {
            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: #E8E8E8;
        }

        header {
            background: linear-gradient(135deg, #1a4d7a 0%, #2870a8 100%);
            color: white;
            padding: 2rem 1rem;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
        }

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

        h1 {
            font-size: 2.5rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
        }

        nav {
            background-color: #fff;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        nav ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0;
        }

        nav ul li {
            flex: 1 1 auto;
        }

        nav ul li a {
            display: block;
            padding: 1rem 1.5rem;
            color: #1a4d7a;
            text-decoration: none;
            font-weight: 500;
            transition: background-color 0.3s, color 0.3s;
            text-align: center;
        }

        nav ul li a:hover {
            background-color: #2870a8;
            color: white;
        }

        main {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 1rem;
        }

        article {
            background: white;
            padding: 2.5rem;
            margin-bottom: 2rem;
            border-radius: 8px;
            box-shadow: 0 2px 12px rgba(0,0,0,0.08);
        }

        article h2 {
            color: #1a4d7a;
            font-size: 2rem;
            margin-top: 2rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #2870a8;
        }

        article h3 {
            color: #2870a8;
            font-size: 1.5rem;
            margin-top: 1.5rem;
            margin-bottom: 0.75rem;
        }

        article h4 {
            color: #1a4d7a;
            font-size: 1.25rem;
            margin-top: 1.25rem;
            margin-bottom: 0.5rem;
        }

        article p {
            margin-bottom: 1.25rem;
            font-size: 1.05rem;
            line-height: 1.8;
        }

        .transition-section {
            background: white;
            padding: 2rem 2.5rem;
            margin-bottom: 2rem;
            border-radius: 8px;
            box-shadow: 0 2px 12px rgba(0,0,0,0.08);
        }

        .transition-section p {
            font-size: 1.05rem;
            line-height: 1.8;
            margin-bottom: 1rem;
        }

        .links-section {
            background: white;
            padding: 2.5rem;
            border-radius: 8px;
            box-shadow: 0 2px 12px rgba(0,0,0,0.08);
            margin-bottom: 2rem;
        }

        .links-section h3 {
            color: #1a4d7a;
            font-size: 1.5rem;
            margin-top: 2rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #E8E8E8;
        }

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

        .links-section ul {
            list-style: none;
            column-count: 2;
            column-gap: 2rem;
            margin-bottom: 1.5rem;
        }

        .links-section ul li {
            break-inside: avoid;
            margin-bottom: 0.75rem;
        }

        .links-section ul li a {
            color: #2870a8;
            text-decoration: none;
            font-size: 1rem;
            transition: color 0.3s;
            display: inline-block;
            padding: 0.25rem 0;
        }

        .links-section ul li a:hover {
            color: #1a4d7a;
            text-decoration: underline;
        }

        footer {
            background: linear-gradient(135deg, #1a4d7a 0%, #2870a8 100%);
            color: white;
            padding: 2rem 1rem;
            margin-top: 3rem;
        }

        footer ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            max-width: 1200px;
            margin: 0 auto;
            gap: 1.5rem;
        }

        footer ul li a {
            color: white;
            text-decoration: none;
            font-size: 0.95rem;
            transition: opacity 0.3s;
        }

        footer ul li a:hover {
            opacity: 0.8;
            text-decoration: underline;
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 1.75rem;
            }

            nav ul {
                flex-direction: column;
            }

            nav ul li {
                border-bottom: 1px solid #E8E8E8;
            }

            nav ul li:last-child {
                border-bottom: none;
            }

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

            article h2 {
                font-size: 1.5rem;
            }

            article h3 {
                font-size: 1.25rem;
            }

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

            footer ul {
                flex-direction: column;
                align-items: center;
                gap: 0.75rem;
            }
        }

        @media (max-width: 480px) {
            header {
                padding: 1.5rem 1rem;
            }

            h1 {
                font-size: 1.5rem;
            }

            nav ul li a {
                padding: 0.75rem 1rem;
            }

            article, .transition-section, .links-section {
                padding: 1.25rem;
            }
        }