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

        body {
            font-family: 'Open Sans', helvetica, arial, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f9f9f9;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        header {
            background-color: #fff;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px 30px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo {
            font-size: 24px;
            font-weight: 700;
            color: #267697;
            text-decoration: none;
        }

        nav ul {
            list-style: none;
            display: flex;
            gap: 30px;
            align-items: center;
        }

        nav ul li a {
            text-decoration: none;
            color: #333;
            font-weight: 500;
            transition: color 0.3s;
            font-size: 15px;
        }

        nav ul li a:hover {
            color: #267697;
        }

        .main-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 60px 30px;
        }

        h1 {
            font-size: 48px;
            line-height: 1.2;
            color: #267697;
            margin-bottom: 40px;
            font-weight: 700;
        }

        article {
            background-color: #fff;
            padding: 50px;
            border-radius: 8px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
            margin-bottom: 50px;
        }

        article h2 {
            font-size: 32px;
            color: #333;
            margin-top: 40px;
            margin-bottom: 20px;
            font-weight: 600;
        }

        article h3 {
            font-size: 24px;
            color: #444;
            margin-top: 30px;
            margin-bottom: 15px;
            font-weight: 600;
        }

        article h4 {
            font-size: 20px;
            color: #555;
            margin-top: 25px;
            margin-bottom: 12px;
            font-weight: 600;
        }

        article p {
            font-size: 16px;
            line-height: 1.8;
            color: #666;
            margin-bottom: 20px;
        }

        .transition-section {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 30px 40px;
        }

        .transition-section p {
            font-size: 17px;
            line-height: 1.8;
            color: #555;
            background-color: #fff;
            padding: 30px;
            border-radius: 8px;
            margin-bottom: 20px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }

        .links-section {
            max-width: 1200px;
            margin: 0 auto;
            padding: 50px 30px;
            background-color: #fff;
            border-radius: 8px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }

        .links-section h3 {
            font-size: 26px;
            color: #267697;
            margin-bottom: 25px;
            font-weight: 600;
            padding-bottom: 15px;
            border-bottom: 3px solid #267697;
        }

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px 30px;
            margin-bottom: 50px;
        }

        .links-section ul:last-child {
            margin-bottom: 0;
        }

        .links-section ul li {
            padding-left: 20px;
            position: relative;
        }

        .links-section ul li:before {
            content: "→";
            position: absolute;
            left: 0;
            color: #267697;
            font-weight: bold;
        }

        .links-section ul li a {
            color: #3a579a;
            text-decoration: none;
            font-size: 15px;
            transition: color 0.3s;
            display: inline-block;
        }

        .links-section ul li a:hover {
            color: #267697;
            text-decoration: underline;
        }

        footer {
            background-color: #32506d;
            color: #fff;
            padding: 40px 30px;
            margin-top: 80px;
        }

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

        .footer-container p {
            font-size: 14px;
            opacity: 0.9;
        }

        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                gap: 20px;
                padding: 15px 20px;
            }

            nav ul {
                flex-direction: column;
                gap: 15px;
            }

            .main-content {
                padding: 30px 20px;
            }

            h1 {
                font-size: 32px;
                margin-bottom: 30px;
            }

            article {
                padding: 30px 25px;
            }

            article h2 {
                font-size: 26px;
            }

            article h3 {
                font-size: 20px;
            }

            article h4 {
                font-size: 18px;
            }

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

            .links-section ul {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .links-section h3 {
                font-size: 22px;
            }

            .transition-section {
                padding: 0 20px 30px;
            }
        }

        @media (max-width: 480px) {
            h1 {
                font-size: 28px;
            }

            article {
                padding: 20px;
            }

            article h2 {
                font-size: 22px;
            }

            .links-section {
                padding: 25px 15px;
            }
        }