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

        body {
            font-family: Verdana, Geneva, sans-serif;
            background: linear-gradient(to right, #868686 0%, #DAE4DC 200px, #DAE4DC 100%);
            color: #333;
            line-height: 1.6;
            min-height: 100vh;
        }

        .container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            min-height: 100vh;
        }

        .sidebar {
            width: 200px;
            background: linear-gradient(to bottom, rgba(255,255,255,0.1), transparent);
            padding: 20px 15px;
            color: #fff;
            flex-shrink: 0;
        }

        .sidebar h4 {
            font-size: 14px;
            margin-bottom: 15px;
            font-weight: bold;
        }

        .sidebar h4:first-child {
            font-size: 18px;
            margin-bottom: 20px;
        }

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

        .sidebar li {
            margin-bottom: 8px;
            font-size: 10pt;
        }

        .sidebar a {
            color: #fff;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .sidebar a:hover {
            color: #FF0000;
        }

        .sidebar .highlight {
            color: #FF0000;
        }

        .sidebar p {
            font-size: 10pt;
            margin-bottom: 15px;
        }

        .spacer {
            width: 20px;
            background: #868686;
            flex-shrink: 0;
        }

        .main-content {
            flex: 1;
            background: #DAE4DC;
            padding: 0;
        }

        .header {
            background: linear-gradient(135deg, #b8c9bb 0%, #DAE4DC 100%);
            padding: 25px 30px;
            border-bottom: 3px solid #868686;
        }

        .header h1 {
            font-size: 32px;
            color: #2c3e50;
            font-weight: bold;
        }

        .content-area {
            padding: 30px;
        }

        article {
            background: #fff;
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
            margin-bottom: 30px;
        }

        article h2,
        article h3,
        article h4 {
            color: #2c3e50;
            margin-top: 20px;
            margin-bottom: 15px;
        }

        article h2 {
            font-size: 24px;
            border-bottom: 2px solid #868686;
            padding-bottom: 8px;
        }

        article h3 {
            font-size: 20px;
        }

        article h4 {
            font-size: 16px;
        }

        article p {
            margin-bottom: 15px;
            font-size: 14px;
        }

        article b,
        article strong {
            color: #2c3e50;
        }

        .transition-section {
            background: #f5f8f6;
            padding: 25px 30px;
            border-radius: 8px;
            margin-bottom: 30px;
            border-left: 4px solid #868686;
        }

        .transition-section p {
            font-size: 14px;
            margin-bottom: 10px;
        }

        .links-section {
            background: #fff;
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
        }

        .links-section h2 {
            font-size: 24px;
            color: #2c3e50;
            margin-bottom: 20px;
            border-bottom: 2px solid #868686;
            padding-bottom: 10px;
        }

        .links-section h3 {
            font-size: 18px;
            color: #2c3e50;
            margin-top: 25px;
            margin-bottom: 12px;
        }

        .links-section ul {
            list-style: none;
            column-count: 2;
            column-gap: 30px;
            margin-bottom: 20px;
        }

        .links-section li {
            margin-bottom: 10px;
            break-inside: avoid;
            page-break-inside: avoid;
        }

        .links-section li::before {
            content: ">> ";
            color: #868686;
            font-weight: bold;
        }

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

        .links-section a:hover {
            color: #FF0000;
            text-decoration: underline;
        }

        @media (max-width: 1024px) {
            body {
                background: #DAE4DC;
            }

            .container {
                flex-direction: column;
            }

            .sidebar {
                width: 100%;
                background: #868686;
                padding: 20px;
            }

            .spacer {
                display: none;
            }

            .header h1 {
                font-size: 28px;
            }

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

        @media (max-width: 768px) {
            .content-area {
                padding: 20px;
            }

            article {
                padding: 20px;
            }

            .header {
                padding: 20px;
            }

            .header h1 {
                font-size: 24px;
            }

            article h2 {
                font-size: 20px;
            }

            article h3 {
                font-size: 18px;
            }

            .links-section {
                padding: 20px;
            }

            .transition-section {
                padding: 20px;
            }
        }

        @media (max-width: 480px) {
            .header h1 {
                font-size: 20px;
            }

            article p,
            .transition-section p,
            .links-section a {
                font-size: 13px;
            }

            .sidebar h4:first-child {
                font-size: 16px;
            }
        }