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

        body {
            font-family: Arial, Verdana, sans-serif;
            background-color: #ffffff;
            color: #333;
            line-height: 1.6;
        }

        header {
            background: linear-gradient(to bottom, #f8f8f8 0%, #e6e6e6 100%);
            border-bottom: 3px solid #000099;
            padding: 20px 0;
        }

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

        .header-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
        }

        .logo-area {
            font-size: 24px;
            font-weight: bold;
            color: #000099;
        }

        .tagline {
            text-align: right;
            flex: 1;
            min-width: 250px;
        }

        .tagline-main {
            font-size: 28px;
            color: #dddddd;
            font-weight: normal;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
        }

        .tagline-sub {
            font-size: 12px;
            color: #000099;
            font-weight: bold;
            margin-top: 5px;
        }

        nav {
            background: linear-gradient(to bottom, #4a4a4a 0%, #2a2a2a 100%);
            border-top: 2px solid #000099;
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
        }

        nav a {
            color: #ffffff;
            text-decoration: none;
            padding: 12px 18px;
            display: block;
            font-size: 11px;
            font-weight: bold;
            text-transform: uppercase;
            border-right: 1px solid #555;
            transition: background-color 0.3s;
        }

        nav a:hover {
            background-color: #000099;
        }

        nav a:last-child {
            border-right: none;
        }

        .hero-image {
            width: 100%;
            max-height: 200px;
            overflow: hidden;
            background-color: #e6e6e6;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        main {
            max-width: 1200px;
            margin: 0 auto;
            padding: 40px 20px;
            display: flex;
            gap: 30px;
            flex-wrap: wrap;
        }

        .sidebar {
            flex: 0 0 250px;
            background-color: #e6e6e6;
            padding: 20px;
            border-left: 3px solid #dddddd;
        }

        .sidebar a {
            color: #000099;
            text-decoration: none;
            display: block;
            padding: 8px 0;
            font-size: 13px;
            font-weight: bold;
            text-align: right;
            transition: color 0.3s;
        }

        .sidebar a:hover {
            color: #0000cc;
        }

        .sidebar a::before {
            content: "■ ";
            color: #000099;
            font-size: 8px;
            margin-right: 8px;
        }

        .sidebar-section {
            margin-bottom: 25px;
        }

        .sidebar-title {
            font-size: 13px;
            font-weight: bold;
            text-align: center;
            margin-bottom: 15px;
            color: #333;
        }

        .content {
            flex: 1;
            min-width: 300px;
        }

        h1 {
            color: #000099;
            font-size: 32px;
            margin-bottom: 25px;
            padding-bottom: 15px;
            border-bottom: 3px solid #e6e6e6;
        }

        article h2 {
            color: #000099;
            font-size: 24px;
            margin-top: 30px;
            margin-bottom: 15px;
        }

        article h3 {
            color: #333;
            font-size: 18px;
            margin-top: 25px;
            margin-bottom: 12px;
        }

        article p {
            margin-bottom: 15px;
            text-align: justify;
        }

        .transition-section {
            margin: 40px 0;
            padding: 25px;
            background-color: #f8f8f8;
            border-left: 4px solid #000099;
        }

        .links-section {
            margin-top: 40px;
            padding: 30px;
            background-color: #e6e6e6;
            border-radius: 5px;
        }

        .links-section h3 {
            color: #000099;
            font-size: 20px;
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 2px solid #dddddd;
        }

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

        .links-section li {
            margin-bottom: 10px;
            break-inside: avoid;
            padding-left: 18px;
            position: relative;
        }

        .links-section li::before {
            content: "■";
            position: absolute;
            left: 0;
            color: #000099;
            font-size: 8px;
            top: 5px;
        }

        .links-section a {
            color: #000099;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }

        .links-section a:hover {
            color: #0000cc;
            text-decoration: underline;
        }

        footer {
            background: linear-gradient(to bottom, #4a4a4a 0%, #2a2a2a 100%);
            color: #ffffff;
            text-align: center;
            padding: 20px;
            margin-top: 50px;
            font-size: 12px;
        }

        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                text-align: center;
            }

            .tagline {
                text-align: center;
            }

            .tagline-main {
                font-size: 20px;
            }

            nav a {
                padding: 10px 12px;
                font-size: 10px;
            }

            main {
                flex-direction: column-reverse;
            }

            .sidebar {
                flex: 1 1 100%;
            }

            .sidebar a {
                text-align: left;
            }

            h1 {
                font-size: 26px;
            }

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

        @media (max-width: 480px) {
            .nav-container {
                flex-direction: column;
            }

            nav a {
                border-right: none;
                border-bottom: 1px solid #555;
            }

            h1 {
                font-size: 22px;
            }

            .tagline-main {
                font-size: 18px;
            }
        }