* {
            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: #f5f5f5;
        }

        header {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            padding: 2rem 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

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

        header h1 {
            color: #fff;
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }

        nav {
            background-color: #fff;
            border-bottom: 3px solid #ff0000;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

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

        nav ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            padding: 0;
        }

        nav ul li {
            margin: 0;
        }

        nav ul li a {
            display: block;
            padding: 1rem 1.2rem;
            text-decoration: none;
            color: #333;
            font-weight: 500;
            transition: all 0.3s ease;
            border-bottom: 3px solid transparent;
        }

        nav ul li a:hover,
        nav ul li a.current {
            color: #ff0000;
            border-bottom-color: #ff0000;
            background-color: #f9f9f9;
        }

        main {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 20px;
        }

        article {
            background: #fff;
            padding: 2.5rem;
            margin-bottom: 2rem;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.08);
        }

        article h1 {
            color: #1a1a2e;
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
            padding-bottom: 1rem;
            border-bottom: 3px solid #ff0000;
        }

        article h2 {
            color: #16213e;
            font-size: 2rem;
            margin: 2rem 0 1rem;
        }

        article h3 {
            color: #333;
            font-size: 1.5rem;
            margin: 1.5rem 0 1rem;
        }

        article h4 {
            color: #444;
            font-size: 1.25rem;
            margin: 1.25rem 0 0.75rem;
        }

        article h5 {
            color: #555;
            font-size: 1.1rem;
            margin: 1rem 0 0.5rem;
        }

        article h6 {
            color: #666;
            font-size: 1rem;
            margin: 1rem 0 0.5rem;
        }

        article p {
            margin-bottom: 1.25rem;
            text-align: justify;
            color: #444;
        }

        article ul,
        article ol {
            margin-bottom: 1.25rem;
            padding-left: 2rem;
        }

        article li {
            margin-bottom: 0.5rem;
        }

        article strong,
        article b {
            color: #1a1a2e;
        }

        article em,
        article i {
            color: #555;
        }

        .transition-section {
            background: #fff;
            padding: 2rem;
            margin-bottom: 2rem;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.08);
        }

        .transition-section p {
            margin-bottom: 1rem;
            color: #444;
            line-height: 1.8;
        }

        .links-section {
            background: #fff;
            padding: 2.5rem;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.08);
        }

        .links-section h2 {
            color: #1a1a2e;
            font-size: 2rem;
            margin-bottom: 2rem;
            padding-bottom: 0.75rem;
            border-bottom: 3px solid #ff0000;
        }

        .links-section h3 {
            color: #16213e;
            font-size: 1.5rem;
            margin: 2rem 0 1rem;
        }

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 0.75rem 1.5rem;
            margin-bottom: 2rem;
        }

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

        .links-section ul li a {
            color: #0066cc;
            text-decoration: none;
            transition: all 0.3s ease;
            display: inline-block;
            padding: 0.35rem 0;
            position: relative;
        }

        .links-section ul li a::before {
            content: "›";
            margin-right: 0.5rem;
            color: #ff0000;
            font-weight: bold;
            transition: margin-right 0.3s ease;
        }

        .links-section ul li a:hover {
            color: #ff0000;
            padding-left: 0.5rem;
        }

        .links-section ul li a:hover::before {
            margin-right: 0.75rem;
        }

        footer {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            color: #fff;
            padding: 1.5rem 0;
            margin-top: 3rem;
        }

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

        footer p {
            margin: 0.5rem 0;
            color: #ccc;
        }

        footer a {
            color: #fff;
            text-decoration: none;
            margin: 0 0.75rem;
            transition: color 0.3s ease;
        }

        footer a:hover {
            color: #ff0000;
        }

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

            nav ul {
                flex-direction: column;
            }

            nav ul li {
                width: 100%;
                border-bottom: 1px solid #eee;
            }

            nav ul li a {
                padding: 0.875rem 1rem;
                border-bottom: none;
                border-left: 3px solid transparent;
            }

            nav ul li a:hover,
            nav ul li a.current {
                border-bottom: none;
                border-left-color: #ff0000;
            }

            article {
                padding: 1.5rem;
            }

            article h1 {
                font-size: 1.875rem;
            }

            article h2 {
                font-size: 1.5rem;
            }

            article h3 {
                font-size: 1.25rem;
            }

            .links-section ul {
                grid-template-columns: 1fr;
                gap: 0.5rem;
            }

            .links-section {
                padding: 1.5rem;
            }

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

        @media (max-width: 480px) {
            header h1 {
                font-size: 1.5rem;
            }

            article h1 {
                font-size: 1.5rem;
            }

            nav ul li a {
                font-size: 0.9rem;
            }
        }