* {
            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: #f8f8f8;
        }

        .header-wrapper {
            background: #fff;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 24px;
            font-weight: bold;
            color: #1d78cb;
        }

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

        nav a {
            text-decoration: none;
            color: #333;
            font-weight: 500;
            transition: color 0.3s;
            font-size: 15px;
        }

        nav a:hover {
            color: #1d78cb;
        }

        .hero-section {
            background: linear-gradient(135deg, #1d78cb 0%, #21a117 100%);
            padding: 80px 30px;
            text-align: center;
            color: #fff;
        }

        .hero-section h1 {
            font-size: 48px;
            margin-bottom: 20px;
            font-weight: 700;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
        }

        .main-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 60px 30px;
        }

        article {
            background: #fff;
            padding: 50px;
            margin-bottom: 50px;
            border-radius: 8px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        }

        article h2 {
            color: #1d78cb;
            margin-top: 40px;
            margin-bottom: 20px;
            font-size: 32px;
            font-weight: 600;
        }

        article h2:first-child {
            margin-top: 0;
        }

        article h3 {
            color: #333;
            margin-top: 30px;
            margin-bottom: 15px;
            font-size: 24px;
            font-weight: 600;
        }

        article h4 {
            color: #555;
            margin-top: 25px;
            margin-bottom: 12px;
            font-size: 20px;
            font-weight: 600;
        }

        article p {
            margin-bottom: 20px;
            font-size: 16px;
            line-height: 1.8;
            color: #555;
        }

        article ul, article ol {
            margin-bottom: 20px;
            margin-left: 30px;
        }

        article li {
            margin-bottom: 10px;
            line-height: 1.8;
            color: #555;
        }

        .transition-section {
            background: #f0f7ff;
            padding: 40px 50px;
            margin-bottom: 50px;
            border-radius: 8px;
            border-left: 5px solid #1d78cb;
        }

        .transition-section p {
            font-size: 16px;
            line-height: 1.8;
            color: #555;
            margin-bottom: 15px;
        }

        .transition-section p:last-child {
            margin-bottom: 0;
        }

        .links-section {
            background: #fff;
            padding: 50px;
            border-radius: 8px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        }

        .links-section h2 {
            color: #1d78cb;
            margin-bottom: 30px;
            font-size: 32px;
            font-weight: 600;
            text-align: center;
        }

        .links-section h3 {
            color: #333;
            margin-top: 40px;
            margin-bottom: 20px;
            font-size: 24px;
            font-weight: 600;
            padding-bottom: 10px;
            border-bottom: 2px solid #f0f7ff;
        }

        .links-section h3:first-of-type {
            margin-top: 0;
        }

        .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: #1d78cb;
            text-decoration: none;
            font-size: 15px;
            line-height: 1.6;
            transition: color 0.3s, padding-left 0.3s;
            display: inline-block;
        }

        .links-section a:hover {
            color: #21a117;
            padding-left: 5px;
        }

        .links-section a:before {
            content: "→ ";
            opacity: 0;
            transition: opacity 0.3s;
        }

        .links-section a:hover:before {
            opacity: 1;
        }

        footer {
            background: #333;
            color: #fff;
            padding: 40px 30px;
            text-align: center;
            margin-top: 60px;
        }

        footer p {
            font-size: 14px;
            opacity: 0.8;
        }

        @media (max-width: 968px) {
            .header-container {
                flex-direction: column;
                gap: 20px;
            }

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

            .hero-section h1 {
                font-size: 36px;
            }

            article {
                padding: 30px;
            }

            article h2 {
                font-size: 28px;
            }

            article h3 {
                font-size: 22px;
            }

            .transition-section {
                padding: 30px;
            }

            .links-section {
                padding: 30px;
            }

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

            .links-section h2 {
                font-size: 28px;
            }

            .links-section h3 {
                font-size: 22px;
            }
        }

        @media (max-width: 600px) {
            .hero-section {
                padding: 60px 20px;
            }

            .hero-section h1 {
                font-size: 28px;
            }

            .main-container {
                padding: 40px 20px;
            }

            article {
                padding: 20px;
            }

            article h2 {
                font-size: 24px;
            }

            article h3 {
                font-size: 20px;
            }

            article h4 {
                font-size: 18px;
            }

            .transition-section {
                padding: 20px;
            }

            .links-section {
                padding: 20px;
            }

            .links-section h2 {
                font-size: 24px;
            }

            .links-section h3 {
                font-size: 20px;
            }
        }