@import url('https://fonts.googleapis.com/css2?family=Inter:ital,opsz,wght@0,14..32,100..900;1,14..32,100..900&display=swap');
        * {
            box-sizing: border-box;
        }

        body {
            line-height: 1.6;
            color: #1f2937;
            background: #fff;
            overflow-x: hidden;
        }
        
        /* Main Layout */
        .container {
            max-width: calc(1240px + 60px);
            margin: 100px auto 0 auto;
            padding: 0 30px;
            display: grid;
            grid-template-columns: 280px 1fr;
            gap: 40px;
        }

        /* Sidebar */
        .sidebar {
            position: sticky;
            top: 100px;
            height: fit-content;
        }

        .sidebar-card {
            background: white;
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
        }

        .sidebar-title {
            font-size: 1rem;
            font-weight: 700;
            color: #111827;
            margin-bottom: 15px;
        }

        .sidebar-menu {
            list-style: none;
        }

        .sidebar-menu li {
            margin-bottom: 10px;
        }

        .sidebar-menu a {
            display: block;
            padding: 10px;
            color: #6b7280;
            text-decoration: none;
            border-radius: 8px;
            transition: all 0.2s;
            font-weight: 500;
        }

        .sidebar-menu a:hover {
            background: #f3f4f6;
            color: #00BDF2;
        }

        .sidebar-menu a.active {
            background: #eff6ff;
            color: #00BDF2;
            font-weight: 600;
        }

        /* Content Area */
        .content {
            background: white;
        }

        .page-header {
            margin-bottom: 40px;
            padding-bottom: 30px;
            border-bottom: 2px solid #e5e7eb;
        }

        .page-title {
            font-size: 2.5rem;
            font-weight: 800;
            color: #111827;
            margin-bottom: 15px;
        }

        .page-meta {
            display: flex;
            gap: 20px;
            color: #6b7280;
            font-size: 0.9rem;
        }

        .meta-item {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        /* Typography */
        .content h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #111827;
            margin-top: 30px;
            margin-bottom: 20px;
        }

        .content h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: #111827;
            margin-top: 30px;
            margin-bottom: 15px;
        }

        .content h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #111827;
            margin-top: 25px;
            margin-bottom: 12px;
        }

        .content p {
            color: #4b5563;
            line-height: 1.8;
            margin-bottom: 20px;
            font-size: 1rem;
        }

        .content ul,
        .content ol {
            margin-left: 30px;
            margin-bottom: 20px;
            color: #4b5563;
            line-height: 1.8;
        }

        .content li {
            margin-bottom: 10px;
            padding-left: 5px;
        }

        .content a {
            color: #00BDF2;
            text-decoration: none;
            font-weight: 500;
        }

        .content a:hover {
            text-decoration: underline;
        }

        /* Info Boxes */
        .info-box {
            padding: 20px 25px;
            border-radius: 10px;
            margin: 25px 0;
            border-left: 4px solid;
        }

        .info-box.note {
            background: #eff6ff;
            border-color: #00BDF2;
        }

        .info-box.warning {
            background: #fef3c7;
            border-color: #f59e0b;
        }

        .info-box.success {
            background: #dcfce7;
            border-color: #10b981;
        }

        .info-box-title {
            font-weight: 700;
            color: #111827;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .info-box p {
            margin-bottom: 0;
            font-size: 0.95rem;
        }

        /* Table */
        .content table {
            width: 100%;
            border-collapse: collapse;
            margin: 25px 0;
            background: white;
            border: 1px solid #e5e7eb;
            border-radius: 8px;
            overflow: hidden;
        }

        .content th {
            background: #f9fafb;
            padding: 15px;
            text-align: left;
            font-weight: 700;
            color: #111827;
            border-bottom: 2px solid #e5e7eb;
        }

        .content td {
            padding: 15px;
            border-bottom: 1px solid #e5e7eb;
            color: #4b5563;
        }

        .content tr:last-child td {
            border-bottom: none;
        }

        /* Contact Box */
        .contact-box {
            background: linear-gradient(135deg, #dbeafe 0%, #e0e7ff 100%);
            padding: 30px;
            border-radius: 12px;
            margin-top: 40px;
            text-align: center;
        }

        .contact-box h3 {
            color: #134689;
            margin-top: 0;
            margin-bottom: 10px;
        }

        .contact-box p {
            color: #134689;
            margin-bottom: 20px;
        }

        .contact-btn {
            display: inline-block;
            padding: 12px 30px;
            background: #134689;
            color: white;
            text-decoration: none;
            border-radius: 8px;
            font-weight: 600;
            transition: all 0.2s;
        }

        .contact-btn:hover {
            background: #134689;
            transform: translateY(-2px);
        }

        /* Table of Contents */
        .toc {
            background: #f9fafb;
            padding: 25px;
            border-radius: 10px;
            margin-bottom: 30px;
            border: 1px solid #e5e7eb;
        }

        .toc-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: #111827;
            margin-bottom: 15px;
        }

        .toc-list {
            list-style: none;
            margin: 0;
        }

        .toc-list li {
            margin-bottom: 10px;
            padding-left: 0;
        }

        .toc-list a {
            color: #6b7280;
            text-decoration: none;
            transition: color 0.2s;
        }

        .toc-list a:hover {
            color: #00BDF2;
        }

        /* Footer */
        footer {
            background: #134689 !important;
            color: #9ca3af;
            padding: 30px !important;
            text-align: center;
            margin-top: 40px !important;
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .container {
                grid-template-columns: 1fr;
            }

            .sidebar {
                position: relative;
                top: 0;
            }

            .sidebar-card {
                margin-bottom: 20px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 30px;
                margin: 80px auto 0 auto;
                gap: 14px;
            }

            .page-title {
                font-size: 2rem;
            }

            .content h2 {
                font-size: 1.5rem;
            }

            .content h3 {
                font-size: 1.2rem;
            }

            .page-meta {
                flex-direction: column;
                gap: 10px;
            }
        }