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

        :root {
            --primary-color: #29a2cb;
            --secondary-color: #50596c;
            --dark-color: #333;
            --white-color: #fff;
        }

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

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

        header {
            background-color: var(--white-color);
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            padding: 20px 0;
            margin-bottom: 40px;
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
            text-decoration: none;
        }

        nav ul {
            list-style: none;
            display: flex;
            gap: 30px;
            flex-wrap: wrap;
        }

        nav a {
            color: var(--dark-color);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
        }

        nav a:hover {
            color: var(--primary-color);
        }

        h1 {
            font-size: 2.5rem;
            color: var(--dark-color);
            margin-bottom: 30px;
            line-height: 1.3;
            padding-bottom: 15px;
            border-bottom: 3px solid var(--primary-color);
        }

        article {
            background: #fff;
            padding: 40px;
            margin-bottom: 40px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.08);
            border-radius: 8px;
        }

        article h2 {
            font-size: 2rem;
            color: var(--secondary-color);
            margin-top: 30px;
            margin-bottom: 15px;
        }

        article h3 {
            font-size: 1.6rem;
            color: var(--secondary-color);
            margin-top: 25px;
            margin-bottom: 12px;
        }

        article h4 {
            font-size: 1.3rem;
            color: var(--secondary-color);
            margin-top: 20px;
            margin-bottom: 10px;
        }

        article h5 {
            font-size: 1.1rem;
            color: var(--secondary-color);
            margin-top: 18px;
            margin-bottom: 8px;
        }

        article h6 {
            font-size: 1rem;
            color: var(--secondary-color);
            margin-top: 15px;
            margin-bottom: 8px;
        }

        article p {
            margin-bottom: 18px;
            font-size: 1.05rem;
            color: #444;
        }

        article a {
            color: var(--primary-color);
            text-decoration: underline;
        }

        article a:hover {
            color: var(--secondary-color);
        }

        .transition-section {
            background: #f9f9f9;
            padding: 35px 40px;
            margin-bottom: 40px;
            border-left: 4px solid var(--primary-color);
            border-radius: 8px;
        }

        .transition-section p {
            margin-bottom: 15px;
            font-size: 1.05rem;
            color: #555;
        }

        .links-section {
            background: #fff;
            padding: 40px;
            margin-bottom: 40px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.08);
            border-radius: 8px;
        }

        .links-section h3 {
            font-size: 1.8rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #eee;
        }

        .links-section ul {
            list-style: none;
            column-count: 2;
            column-gap: 40px;
            margin-bottom: 30px;
        }

        .links-section li {
            margin-bottom: 12px;
            break-inside: avoid;
        }

        .links-section a {
            color: var(--dark-color);
            text-decoration: none;
            display: inline-block;
            padding: 8px 0;
            transition: all 0.3s;
            position: relative;
            padding-left: 20px;
        }

        .links-section a:before {
            content: "→";
            position: absolute;
            left: 0;
            color: var(--primary-color);
            font-weight: bold;
        }

        .links-section a:hover {
            color: var(--primary-color);
            padding-left: 25px;
        }

        footer {
            background-color: var(--secondary-color);
            color: var(--white-color);
            padding: 30px 0;
            margin-top: 60px;
            text-align: center;
        }

        footer p {
            margin: 0;
        }

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

            article {
                padding: 25px;
            }

            article h2 {
                font-size: 1.6rem;
            }

            article h3 {
                font-size: 1.4rem;
            }

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

            .header-content {
                flex-direction: column;
                gap: 20px;
            }

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

            .transition-section {
                padding: 25px;
            }

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

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

            article h2 {
                font-size: 1.4rem;
            }

            article p {
                font-size: 1rem;
            }
        }