* {
            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, #1a4d7d 0%, #2c6ba8 100%);
            padding: 1.5rem 0;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }

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

        .brand {
            color: #fff;
            font-size: 1.8rem;
            font-weight: 700;
            text-decoration: none;
            display: inline-block;
            letter-spacing: 0.5px;
        }

        nav {
            background-color: #fff;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.08);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
        }

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

        nav ul li {
            position: relative;
        }

        nav ul li > a {
            display: block;
            padding: 1rem 1.2rem;
            color: #2c6ba8;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        nav ul li > a:hover {
            background-color: #f0f7ff;
            color: #1a4d7d;
        }

        nav ul li.book-btn {
            margin-left: auto;
        }

        nav ul li.book-btn a {
            background-color: #e74c3c;
            color: #fff;
            border-radius: 4px;
            padding: 0.8rem 1.5rem;
        }

        nav ul li.book-btn a:hover {
            background-color: #c0392b;
        }

        nav ul li ul {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            background-color: #fff;
            min-width: 220px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            border-radius: 0 0 4px 4px;
            flex-direction: column;
        }

        nav ul li:hover > ul {
            display: flex;
        }

        nav ul li ul li {
            width: 100%;
        }

        nav ul li ul li a {
            padding: 0.8rem 1.2rem;
            font-weight: 500;
            font-size: 0.85rem;
            border-bottom: 1px solid #f0f0f0;
        }

        nav ul li ul li:last-child a {
            border-bottom: none;
        }

        main {
            max-width: 1200px;
            margin: 0 auto;
            padding: 3rem 20px;
        }

        h1 {
            color: #1a4d7d;
            font-size: 2.5rem;
            margin-bottom: 2rem;
            text-align: center;
            font-weight: 700;
            line-height: 1.2;
        }

        article {
            background-color: #fff;
            padding: 2.5rem;
            margin-bottom: 3rem;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
        }

        article h2 {
            color: #2c6ba8;
            font-size: 1.8rem;
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-weight: 600;
        }

        article h3 {
            color: #1a4d7d;
            font-size: 1.4rem;
            margin-top: 1.5rem;
            margin-bottom: 0.8rem;
            font-weight: 600;
        }

        article h4 {
            color: #2c6ba8;
            font-size: 1.2rem;
            margin-top: 1.2rem;
            margin-bottom: 0.6rem;
            font-weight: 600;
        }

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

        .transition-section {
            background-color: #fff;
            padding: 2.5rem;
            margin-bottom: 3rem;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
        }

        .transition-section p {
            font-size: 1.05rem;
            color: #444;
            margin-bottom: 1.2rem;
            text-align: justify;
        }

        .links-section {
            background: linear-gradient(135deg, #f8fbff 0%, #ffffff 100%);
            padding: 3rem 2.5rem;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
            margin-bottom: 3rem;
        }

        .links-section h3 {
            color: #1a4d7d;
            font-size: 1.5rem;
            margin-top: 2rem;
            margin-bottom: 1.2rem;
            font-weight: 600;
            border-left: 4px solid #2c6ba8;
            padding-left: 1rem;
        }

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

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 0.8rem 2rem;
            margin-bottom: 2rem;
        }

        .links-section ul li {
            position: relative;
            padding-left: 1.5rem;
        }

        .links-section ul li:before {
            content: "→";
            position: absolute;
            left: 0;
            color: #2c6ba8;
            font-weight: bold;
        }

        .links-section ul li a {
            color: #2c6ba8;
            text-decoration: none;
            transition: all 0.3s ease;
            display: inline-block;
            font-size: 1rem;
        }

        .links-section ul li a:hover {
            color: #1a4d7d;
            transform: translateX(5px);
        }

        footer {
            background: linear-gradient(135deg, #1a4d7d 0%, #2c6ba8 100%);
            color: #fff;
            padding: 2.5rem 20px 1.5rem;
            margin-top: 3rem;
        }

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

        footer ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1.5rem;
            margin-bottom: 1.5rem;
        }

        footer ul li a {
            color: #fff;
            text-decoration: none;
            font-size: 0.9rem;
            transition: opacity 0.3s ease;
        }

        footer ul li a:hover {
            opacity: 0.8;
        }

        .footer-social {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
            font-size: 0.95rem;
        }

        .footer-social span {
            margin: 0 1rem;
            font-weight: 600;
        }

        @media (max-width: 968px) {
            nav ul {
                flex-direction: column;
            }

            nav ul li {
                width: 100%;
            }

            nav ul li.book-btn {
                margin-left: 0;
            }

            nav ul li ul {
                position: static;
                display: none;
                box-shadow: none;
                border-left: 3px solid #2c6ba8;
                margin-left: 1rem;
            }

            nav ul li:hover > ul,
            nav ul li:focus-within > ul {
                display: flex;
            }

            h1 {
                font-size: 2rem;
            }

            article {
                padding: 1.5rem;
            }

            .transition-section {
                padding: 1.5rem;
            }

            .links-section {
                padding: 2rem 1.5rem;
            }

            .links-section ul {
                grid-template-columns: 1fr;
                gap: 0.6rem;
            }

            footer ul {
                flex-direction: column;
                align-items: center;
                gap: 0.8rem;
            }
        }

        @media (max-width: 600px) {
            h1 {
                font-size: 1.6rem;
            }

            article h2 {
                font-size: 1.4rem;
            }

            article h3 {
                font-size: 1.2rem;
            }

            article {
                padding: 1.2rem;
            }

            .links-section {
                padding: 1.5rem 1.2rem;
            }

            .brand {
                font-size: 1.4rem;
            }
        }