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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background: #f8f9fa;
        }

        header {
            background: linear-gradient(135deg, #00A8FF 0%, #0077CC 100%);
            color: #fff;
            padding: 1.5rem 0;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        }

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

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        nav {
            background: #fff;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
            position: sticky;
            top: 0;
            z-index: 100;
        }

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

        nav ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            padding: 1rem 0;
        }

        nav ul li a {
            color: #333;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s ease;
            position: relative;
        }

        nav ul li a:hover {
            color: #00A8FF;
        }

        nav ul li a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: #00A8FF;
            transition: width 0.3s ease;
        }

        nav ul li a:hover::after {
            width: 100%;
        }

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

        h1 {
            font-size: 2.5rem;
            color: #222;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 3px solid #00A8FF;
            font-weight: 700;
        }

        article {
            background: #fff;
            padding: 3rem;
            margin-bottom: 3rem;
            border-radius: 8px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
        }

        article h2 {
            font-size: 2rem;
            color: #222;
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-weight: 600;
        }

        article h3 {
            font-size: 1.5rem;
            color: #333;
            margin-top: 1.5rem;
            margin-bottom: 0.8rem;
            font-weight: 600;
        }

        article h4 {
            font-size: 1.25rem;
            color: #444;
            margin-top: 1.2rem;
            margin-bottom: 0.6rem;
            font-weight: 600;
        }

        article p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
            color: #555;
        }

        article ul, article ol {
            margin-bottom: 1.2rem;
            margin-left: 2rem;
        }

        article li {
            margin-bottom: 0.5rem;
            color: #555;
        }

        .transition-section {
            background: #fff;
            padding: 2.5rem 3rem;
            margin-bottom: 3rem;
            border-radius: 8px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
        }

        .transition-section p {
            font-size: 1.05rem;
            color: #555;
            margin-bottom: 1rem;
        }

        .links-section {
            background: #fff;
            padding: 3rem;
            border-radius: 8px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
            margin-bottom: 3rem;
        }

        .links-section h2 {
            font-size: 2rem;
            color: #222;
            margin-bottom: 2rem;
            font-weight: 600;
        }

        .links-section h3 {
            font-size: 1.4rem;
            color: #00A8FF;
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-weight: 600;
        }

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 0.8rem 2rem;
            margin-bottom: 2rem;
        }

        .links-section ul li {
            position: relative;
            padding-left: 1.2rem;
        }

        .links-section ul li::before {
            content: '→';
            position: absolute;
            left: 0;
            color: #00A8FF;
            font-weight: bold;
        }

        .links-section ul li a {
            color: #333;
            text-decoration: none;
            transition: color 0.3s ease, padding-left 0.3s ease;
            display: inline-block;
        }

        .links-section ul li a:hover {
            color: #00A8FF;
            padding-left: 0.3rem;
        }

        footer {
            background: #222;
            color: #fff;
            padding: 2rem 0;
            margin-top: 4rem;
        }

        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            text-align: center;
        }

        footer p {
            margin-bottom: 0.5rem;
            opacity: 0.9;
        }

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

            article {
                padding: 2rem 1.5rem;
            }

            article h2 {
                font-size: 1.6rem;
            }

            article h3 {
                font-size: 1.3rem;
            }

            nav ul {
                flex-direction: column;
                gap: 0.8rem;
            }

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

            .links-section ul {
                grid-template-columns: 1fr;
                gap: 0.6rem;
            }

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

            main {
                margin: 2rem auto;
            }
        }

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

            .header-container {
                padding: 0 1rem;
            }

            .nav-container {
                padding: 0 1rem;
            }

            main {
                padding: 0 1rem;
            }

            article {
                padding: 1.5rem 1rem;
            }

            article h2 {
                font-size: 1.4rem;
            }

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

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