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

        body {
            font-family: 'Arial', sans-serif;
            font-size: 14px;
            line-height: 1.6;
            color: #2a2a2a;
            background: #fff;
        }

        .container {
            max-width: 960px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header */
        header {
            background: #f9f9f9;
            border-bottom: 1px solid #e5e5e5;
            padding: 15px 0;
        }

        .logo-header {
            text-align: center;
            padding: 15px 0;
            background: #fff;
        }

        .logo-header h1 {
            margin: 0;
        }

        .logo-header a {
            text-decoration: none;
            color: #2a2a2a;
            font-size: 24px;
            font-weight: 300;
        }

        .siteSubTitle {
            color: #4c4c4c;
            font-weight: 300;
            font-size: 16px;
            margin-top: 5px;
        }

        /* Navigation */
        .nav-container {
            background: #f9f9f9;
            border-bottom: 1px solid #e5e5e5;
        }

        nav {
            padding: 0;
        }

        .nav-menu {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            margin: 0;
            padding: 0;
        }

        .nav-menu > li {
            position: relative;
        }

        .nav-menu > li > a {
            display: block;
            padding: 19px 11px 21px;
            color: #4c4c4c;
            text-decoration: none;
            font-size: 16px;
            border-right: 1px solid #e5e5e5;
            border-left: 1px solid #fff;
            transition: all 0.3s ease;
        }

        .nav-menu > li:first-child > a {
            border-left: none;
        }

        .nav-menu > li:hover,
        .nav-menu > li.current {
            background: #72aad0;
        }

        .nav-menu > li:hover > a,
        .nav-menu > li.current > a {
            color: #fff;
        }

        .nav-menu .sub-menu {
            position: absolute;
            top: 100%;
            left: 0;
            background: #72aad0;
            width: 250px;
            list-style: none;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-10px);
            transition: all 0.3s ease;
            z-index: 1000;
        }

        .nav-menu li:hover .sub-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .sub-menu li {
            border-top: 1px solid #588eb3;
        }

        .sub-menu li:first-child {
            border-top: none;
        }

        .sub-menu a {
            display: block;
            padding: 10px 17px 8px;
            color: #fff;
            text-decoration: none;
            font-size: 16px;
            transition: background 0.3s ease;
        }

        .sub-menu a:hover {
            background: #639cc8;
        }

        /* Main Content */
        main {
            padding: 40px 0;
        }

        h1 {
            color: #5a99c4;
            font-size: 36px;
            font-weight: 300;
            margin-bottom: 30px;
            text-align: center;
        }

        article {
            background: #fff;
            padding: 40px;
            margin-bottom: 30px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.04);
            border: 1px solid rgba(0, 0, 0, 0.1);
        }

        article p {
            margin-bottom: 20px;
            line-height: 1.8;
        }

        article h2,
        article h3,
        article h4,
        article h5,
        article h6 {
            color: #5a99c4;
            margin-bottom: 15px;
            margin-top: 25px;
        }

        article h2 {
            font-size: 28px;
        }

        article h3 {
            font-size: 24px;
        }

        article h4 {
            font-size: 20px;
        }

        /* Transition section */
        .transition-section {
            background: #fafafa;
            padding: 30px 40px;
            margin-bottom: 30px;
            border: 1px solid #e5e5e5;
        }

        /* Links section */
        .links-section {
            background: #fff;
            padding: 40px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.04);
            border: 1px solid rgba(0, 0, 0, 0.1);
        }

        .links-section h3 {
            color: #5a99c4;
            font-size: 20px;
            margin-bottom: 15px;
            padding-bottom: 5px;
            border-bottom: 2px solid #e5e5e5;
        }

        .links-list {
            list-style: none;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px 30px;
            margin-bottom: 30px;
        }

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

        .links-list li {
            position: relative;
            padding-left: 15px;
        }

        .links-list li:before {
            content: '';
            position: absolute;
            top: 12px;
            left: 4px;
            width: 0;
            height: 0;
            border: 3px solid transparent;
            border-left-color: #4bb6f5;
        }

        .links-list a {
            color: #4bb6f5;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .links-list a:hover {
            color: #2a2a2a;
        }

        /* Footer */
        footer {
            background: #72aad0;
            color: #fff;
            padding: 40px 0 20px;
        }

        .footer-nav {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }

        .footer-nav h4 {
            font-size: 16px;
            margin-bottom: 15px;
        }

        .footer-nav ul {
            list-style: none;
        }

        .footer-nav li {
            margin-bottom: 8px;
        }

        .footer-nav a {
            color: #fff;
            text-decoration: none;
            font-size: 14px;
            transition: opacity 0.3s ease;
        }

        .footer-nav a:hover {
            opacity: 0.8;
        }

        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
            font-size: 12px;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .nav-menu {
                flex-direction: column;
            }

            .nav-menu > li > a {
                border-right: none;
                border-bottom: 1px solid #e5e5e5;
            }

            .nav-menu .sub-menu {
                position: static;
                opacity: 1;
                visibility: visible;
                transform: none;
                width: 100%;
                background: #639cc8;
            }

            article,
            .links-section {
                padding: 20px;
            }

            .links-list {
                grid-template-columns: 1fr;
                gap: 10px;
            }

            h1 {
                font-size: 28px;
            }

            .footer-nav {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }

            .logo-header a {
                font-size: 20px;
            }

            h1 {
                font-size: 24px;
            }

            article,
            .links-section {
                padding: 15px;
            }
        }