* {
            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;
        }

        header {
            background: linear-gradient(135deg, #00a69c 0%, #008c84 100%);
            color: #fff;
            padding: 2rem 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

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

        nav {
            background: #fff;
            border-bottom: 3px solid #00a69c;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
        }

        nav ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        nav ul li {
            margin: 0;
        }

        nav ul li a {
            display: block;
            padding: 15px 20px;
            color: #333;
            text-decoration: none;
            transition: all 0.3s ease;
            border-bottom: 3px solid transparent;
        }

        nav ul li a:hover {
            color: #00a69c;
            background: #f9f9f9;
            border-bottom-color: #00a69c;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 40px 20px;
        }

        h1 {
            font-size: 2.5rem;
            color: #333;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 4px solid #00a69c;
        }

        article {
            background: #fff;
            padding: 30px;
            margin-bottom: 30px;
            border-radius: 8px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.08);
        }

        article h2 {
            color: #00a69c;
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-size: 1.8rem;
        }

        article h3 {
            color: #333;
            margin-top: 1.5rem;
            margin-bottom: 0.8rem;
            font-size: 1.4rem;
        }

        article h4 {
            color: #555;
            margin-top: 1.2rem;
            margin-bottom: 0.6rem;
            font-size: 1.2rem;
        }

        article p {
            margin-bottom: 1.2rem;
            color: #555;
            line-height: 1.8;
        }

        .transition-section {
            background: #fff;
            padding: 30px;
            margin-bottom: 30px;
            border-radius: 8px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.08);
        }

        .transition-section p {
            color: #555;
            line-height: 1.8;
            margin-bottom: 1rem;
        }

        .links-section {
            background: #fff;
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.08);
        }

        .links-section h2 {
            color: #00a69c;
            margin-bottom: 1.5rem;
            font-size: 2rem;
        }

        .links-section h3 {
            color: #333;
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-size: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e5e5e5;
        }

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 10px 30px;
            margin-bottom: 2rem;
        }

        .links-section ul li {
            padding: 8px 0;
        }

        .links-section ul li a {
            color: #00a69c;
            text-decoration: none;
            transition: all 0.3s ease;
            display: inline-block;
        }

        .links-section ul li a:hover {
            color: #008c84;
            padding-left: 5px;
        }

        footer {
            background: #333;
            color: #fff;
            padding: 30px 0;
            margin-top: 40px;
        }

        .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            text-align: center;
        }

        .footer-inner p {
            margin: 10px 0;
            color: #ccc;
        }

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

            nav ul {
                flex-direction: column;
            }

            nav ul li a {
                padding: 12px 15px;
            }

            article {
                padding: 20px;
            }

            .links-section ul {
                grid-template-columns: 1fr;
                gap: 8px;
            }

            article h2 {
                font-size: 1.5rem;
            }

            article h3 {
                font-size: 1.3rem;
            }
        }

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

            .container {
                padding: 20px 15px;
            }

            article {
                padding: 15px;
            }

            .transition-section {
                padding: 20px;
            }

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