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

        body {
            font-family: 'Georgia', 'Times New Roman', serif;
            line-height: 1.6;
            color: #333;
            background-color: #f5f5f5;
        }

        header {
            background-color: #fff;
            border-bottom: 1px solid #e0e0e0;
            padding: 1.5rem 0;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        }

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

        nav {
            background-color: #2c2c2c;
            padding: 0;
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            padding: 0;
        }

        nav ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            margin: 0;
            padding: 0;
            width: 100%;
        }

        nav li {
            margin: 0;
        }

        nav a {
            display: block;
            color: #fff;
            text-decoration: none;
            padding: 1rem 1.5rem;
            transition: background-color 0.3s ease;
            font-size: 0.95rem;
            letter-spacing: 0.5px;
        }

        nav a:hover {
            background-color: #444;
        }

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

        h1 {
            font-size: 2.5rem;
            color: #2c2c2c;
            margin: 2rem 0 1.5rem 0;
            font-weight: 400;
            letter-spacing: 1px;
        }

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

        article h2 {
            font-size: 1.8rem;
            color: #2c2c2c;
            margin: 2rem 0 1rem 0;
            font-weight: 400;
        }

        article h3 {
            font-size: 1.4rem;
            color: #444;
            margin: 1.5rem 0 0.8rem 0;
            font-weight: 400;
        }

        article h4 {
            font-size: 1.2rem;
            color: #555;
            margin: 1.2rem 0 0.6rem 0;
            font-weight: 400;
        }

        article p {
            margin-bottom: 1.2rem;
            color: #444;
            font-size: 1.05rem;
        }

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

        .transition-section p {
            margin-bottom: 1rem;
            color: #444;
            font-size: 1.05rem;
        }

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

        .links-section h2 {
            font-size: 1.8rem;
            color: #2c2c2c;
            margin-bottom: 1.5rem;
            font-weight: 400;
        }

        .links-section h3 {
            font-size: 1.3rem;
            color: #2c2c2c;
            margin: 1.5rem 0 1rem 0;
            font-weight: 400;
            border-bottom: 1px solid #e0e0e0;
            padding-bottom: 0.5rem;
        }

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

        .links-section li {
            margin-bottom: 0.6rem;
            break-inside: avoid;
        }

        .links-section a {
            color: #555;
            text-decoration: none;
            transition: color 0.3s ease;
            display: inline-block;
            padding: 0.3rem 0;
            font-size: 1rem;
        }

        .links-section a:hover {
            color: #2c2c2c;
            text-decoration: underline;
        }

        .links-section a::before {
            content: "→ ";
            color: #999;
            margin-right: 0.3rem;
        }

        footer {
            background-color: #2c2c2c;
            color: #ccc;
            padding: 2rem 0;
            margin-top: 3rem;
            text-align: center;
        }

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

        footer p {
            margin: 0.5rem 0;
            font-size: 0.9rem;
        }

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

            article {
                padding: 1.5rem;
            }

            article h2 {
                font-size: 1.5rem;
            }

            article h3 {
                font-size: 1.2rem;
            }

            .transition-section {
                padding: 1.5rem;
            }

            .links-section {
                padding: 1.5rem;
            }

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

            nav a {
                padding: 0.8rem 1rem;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 480px) {
            h1 {
                font-size: 1.6rem;
                margin: 1.5rem 0 1rem 0;
            }

            article {
                padding: 1rem;
            }

            article h2 {
                font-size: 1.3rem;
            }

            .transition-section {
                padding: 1rem;
            }

            .links-section {
                padding: 1rem;
            }

            nav a {
                padding: 0.7rem 0.8rem;
                font-size: 0.85rem;
            }
        }