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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #fff;
        }

        header {
            background: linear-gradient(135deg, #00AFF2 0%, #0088cc 100%);
            padding: 20px 0;
            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: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 24px;
            font-weight: bold;
            color: #fff;
            text-decoration: none;
        }

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

        nav a {
            color: #fff;
            text-decoration: none;
            font-weight: 500;
            transition: opacity 0.3s ease;
        }

        nav a:hover {
            opacity: 0.8;
        }

        .main-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 60px 20px;
        }

        h1 {
            font-size: 42px;
            font-weight: 700;
            color: #222;
            margin-bottom: 40px;
            line-height: 1.2;
            text-align: center;
        }

        article {
            background: #fff;
            padding: 40px;
            margin-bottom: 50px;
            border-radius: 8px;
            box-shadow: 0 2px 20px rgba(0,0,0,0.08);
        }

        article h2 {
            font-size: 32px;
            color: #222;
            margin: 40px 0 20px 0;
            font-weight: 600;
        }

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

        article h3 {
            font-size: 24px;
            color: #333;
            margin: 30px 0 15px 0;
            font-weight: 600;
        }

        article h4 {
            font-size: 20px;
            color: #444;
            margin: 25px 0 12px 0;
            font-weight: 600;
        }

        article p {
            font-size: 17px;
            line-height: 1.8;
            margin-bottom: 20px;
            color: #555;
        }

        article ul, article ol {
            margin: 20px 0;
            padding-left: 30px;
        }

        article li {
            margin-bottom: 10px;
            font-size: 17px;
            line-height: 1.7;
            color: #555;
        }

        .transition-section {
            background: #f8f9fa;
            padding: 40px;
            margin-bottom: 50px;
            border-radius: 8px;
            border-left: 4px solid #00AFF2;
        }

        .transition-section p {
            font-size: 17px;
            line-height: 1.8;
            color: #555;
            margin-bottom: 20px;
        }

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

        {% if links %}
        .links-section {
            background: #fff;
            padding: 50px 40px;
            border-radius: 8px;
            box-shadow: 0 2px 20px rgba(0,0,0,0.08);
            margin-bottom: 50px;
        }

        .links-section h3 {
            font-size: 26px;
            color: #222;
            margin-bottom: 20px;
            font-weight: 600;
            padding-bottom: 10px;
            border-bottom: 3px solid #00AFF2;
        }

        .links-section ul {
            list-style: none;
            padding: 0;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px 30px;
            margin-bottom: 40px;
        }

        .links-section ul:last-child {
            margin-bottom: 0;
        }

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

        .links-section a {
            color: #00AFF2;
            text-decoration: none;
            font-size: 16px;
            line-height: 1.6;
            display: inline-block;
            transition: all 0.3s ease;
            position: relative;
            padding-left: 15px;
        }

        .links-section a:before {
            content: "→";
            position: absolute;
            left: 0;
            transition: transform 0.3s ease;
        }

        .links-section a:hover {
            color: #0088cc;
            padding-left: 20px;
        }

        .links-section a:hover:before {
            transform: translateX(5px);
        }
        {% endif %}

        footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 30px 20px;
            text-align: center;
            margin-top: 60px;
        }

        footer p {
            font-size: 15px;
            margin: 0;
        }

        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                gap: 20px;
            }

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

            h1 {
                font-size: 32px;
                margin-bottom: 30px;
            }

            article {
                padding: 25px;
            }

            article h2 {
                font-size: 26px;
            }

            article h3 {
                font-size: 22px;
            }

            article h4 {
                font-size: 18px;
            }

            article p, article li {
                font-size: 16px;
            }

            .transition-section {
                padding: 25px;
            }

            .transition-section p {
                font-size: 16px;
            }

            {% if links %}
            .links-section {
                padding: 30px 25px;
            }

            .links-section ul {
                grid-template-columns: 1fr;
                gap: 12px;
            }

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

            .links-section a {
                font-size: 15px;
            }
            {% endif %}
        }

        @media (max-width: 480px) {
            .main-content {
                padding: 40px 15px;
            }

            h1 {
                font-size: 28px;
            }

            article {
                padding: 20px;
            }

            article h2 {
                font-size: 24px;
            }

            .transition-section {
                padding: 20px;
            }

            {% if links %}
            .links-section {
                padding: 25px 20px;
            }
            {% endif %}
        }