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

        body {
            font-family: Arial, Helvetica, sans-serif;
            font-size: 14px;
            line-height: 1.6;
            color: #333;
            background-color: #f5f5f5;
        }

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

        header {
            background-color: #fff;
            border-bottom: 2px solid #ccc;
            padding: 15px 0;
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        .logo {
            font-size: 18px;
            font-weight: bold;
            color: #333;
            text-decoration: none;
        }

        .site-tools {
            display: flex;
            gap: 15px;
        }

        .site-tools a {
            color: #333;
            text-decoration: none;
            font-size: 13px;
        }

        .site-tools a:hover {
            color: #666;
        }

        .search-wrapper {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .search-input {
            padding: 6px 10px;
            border: 1px solid #ccc;
            border-radius: 3px;
            font-size: 13px;
        }

        nav {
            background-color: #e6e6e6;
            border-bottom: 1px solid #ccc;
        }

        .nav-content {
            display: flex;
            gap: 30px;
            padding: 12px 0;
        }

        .nav-content a {
            color: #333;
            text-decoration: none;
            font-size: 14px;
            font-weight: bold;
        }

        .nav-content a:hover {
            color: #666;
        }

        .main-wrapper {
            display: flex;
            gap: 20px;
            margin-top: 20px;
            align-items: flex-start;
        }

        .sidebar {
            flex: 0 0 250px;
            background-color: #fff;
            padding: 20px;
            border: 1px solid #ddd;
            border-radius: 5px;
        }

        .sidebar h3 {
            font-size: 14px;
            font-weight: bold;
            margin-bottom: 10px;
            color: #333;
            text-transform: uppercase;
        }

        .sidebar ul {
            list-style: none;
            margin-bottom: 20px;
        }

        .sidebar li {
            margin-bottom: 5px;
        }

        .sidebar a {
            color: #333;
            text-decoration: none;
            font-size: 13px;
        }

        .sidebar a:hover {
            color: #666;
        }

        .promo-section {
            margin-top: 20px;
            text-align: center;
            font-size: 12px;
        }

        .content-area {
            flex: 1;
            background-color: #fff;
            padding: 30px;
            border: 1px solid #ddd;
            border-radius: 5px;
        }

        h1 {
            font-size: 28px;
            font-weight: bold;
            color: #333;
            margin-bottom: 25px;
            text-align: center;
        }

        article {
            margin-bottom: 30px;
        }

        article p {
            margin-bottom: 15px;
            font-size: 15px;
            line-height: 1.7;
        }

        article h2 {
            font-size: 24px;
            margin: 25px 0 15px 0;
            color: #333;
        }

        article h3 {
            font-size: 20px;
            margin: 20px 0 12px 0;
            color: #333;
        }

        .transition-section {
            background-color: #f9f9f9;
            padding: 20px;
            margin: 30px 0;
            border-left: 4px solid #ccc;
            border-radius: 3px;
        }

        .transition-section p {
            margin-bottom: 15px;
            font-size: 15px;
        }

        .links-section {
            background-color: #fafafa;
            padding: 25px;
            border: 1px solid #e0e0e0;
            border-radius: 5px;
            margin-top: 20px;
        }

        .links-section h3 {
            font-size: 18px;
            margin-bottom: 15px;
            color: #333;
            border-bottom: 2px solid #ccc;
            padding-bottom: 8px;
        }

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px 30px;
            margin-bottom: 25px;
        }

        .links-section li {
            padding: 8px 0;
            border-bottom: 1px solid #eee;
        }

        .links-section a {
            color: #0066cc;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }

        .links-section a:hover {
            color: #004499;
            text-decoration: underline;
        }

        footer {
            background-color: #333;
            color: #fff;
            margin-top: 50px;
            padding: 30px 0;
        }

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

        .footer-section {
            padding: 10px;
        }

        .footer-section h4 {
            font-size: 16px;
            margin-bottom: 15px;
            color: #fff;
        }

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

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

        .footer-section a {
            color: #ccc;
            text-decoration: none;
            font-size: 13px;
        }

        .footer-section a:hover {
            color: #fff;
        }

        .footer-bottom {
            text-align: center;
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid #666;
            font-size: 12px;
            color: #ccc;
        }

        .footer-bottom a {
            color: #ccc;
            text-decoration: none;
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        @media (max-width: 768px) {
            .main-wrapper {
                flex-direction: column;
            }

            .sidebar {
                flex: none;
                width: 100%;
            }

            .header-content {
                flex-direction: column;
                text-align: center;
            }

            .nav-content {
                flex-wrap: wrap;
                justify-content: center;
            }

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

            h1 {
                font-size: 24px;
            }
        }

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

            .content-area {
                padding: 20px;
            }

            .site-tools {
                flex-direction: column;
                gap: 8px;
            }

            h1 {
                font-size: 22px;
            }
        }