.kb-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 2rem;
            background: var(--white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin-top: 2rem;
            margin-bottom: 2rem;
        }

        .kb-header {
            text-align: center;
            margin-bottom: 3rem;
            padding-bottom: 2rem;
            border-bottom: 3px solid var(--accent);
        }

        .kb-header h1 {
            color: var(--primary);
            font-size: 2.5rem;
            margin-bottom: 1rem;
            font-weight: 700;
        }

        .kb-header p {
            color: var(--text);
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto;
        }

        .tab-container {
            margin-bottom: 2rem;
            background: linear-gradient(165deg, #f6fffc 0%, #ffffff 68%);
            border-radius: 18px;
            box-shadow: 0 10px 24px rgba(0, 0, 0, 0.08);
            border: 1px solid rgba(65, 184, 168, 0.2);
            padding: 1.25rem 1.25rem 1.5rem;
        }

        .tab-buttons {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 1rem;
            margin-bottom: 0.6rem;
            padding: 0;
            align-items: stretch;
        }

        .tab-button {
            background: #ffffff;
            border: 1px solid rgba(89, 201, 188, 0.55);
            border-radius: 8px 8px 0 0;
            padding: 1.1rem 1rem 1rem;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 700;
            color: #2ea89b;
            transition: all 0.25s ease;
            position: relative;
            overflow: hidden;
            text-align: center;
            box-shadow: 0 6px 14px rgba(0, 0, 0, 0.08);
            min-height: 128px;
        }

        .tab-button .button-content {
            position: relative;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 0.65rem;
            height: 100%;
        }

        .tab-button .button-icon {
            width: auto;
            height: auto;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2.1rem;
            color: inherit;
            transition: transform 0.25s ease;
        }

        .tab-button .button-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin: 0;
            color: inherit;
            transition: color 0.25s ease;
            line-height: 1.2;
            max-width: 18ch;
        }

        .tab-button .button-description {
            display: -webkit-box;
            margin: 0;
            font-size: 0.95rem;
            font-weight: 500;
            line-height: 1.35;
            opacity: 0.92;
            max-width: 44ch;
            overflow: hidden;
            text-overflow: ellipsis;
            line-clamp: 3;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
        }

        .tab-button .document-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.25rem 0.6rem;
            border-radius: 999px;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.02em;
            background: rgba(255, 255, 255, 0.18);
            border: 1px solid rgba(255, 255, 255, 0.28);
            color: inherit;
        }

        .tab-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.12);
            border-color: rgba(89, 201, 188, 0.75);
        }

        .tab-button:hover .button-icon {
            transform: scale(1.03);
        }

        .tab-button.active {
            background: #59c9bc;
            border-color: #59c9bc;
            color: #0b0b0b;
            box-shadow: 0 12px 26px rgba(58, 176, 163, 0.26);
            border-radius: 16px 16px 0 0;
            transform: translateY(-4px);
            padding-top: 1.25rem;
            margin-bottom: -2px;
        }

        .tab-button.active .button-icon {
            color: inherit;
            transform: none;
        }

        .tab-button.active .button-title {
            color: inherit;
        }

        .tab-button.active .button-description {
            opacity: 0.95;
        }

        .tab-button.active .document-badge {
            background: rgba(255, 255, 255, 0.3);
            border-color: rgba(255, 255, 255, 0.45);
        }

        .tab-content {
            display: none;
            animation: fadeIn 0.5s ease-in-out;
        }

        .tab-content.active {
            display: block;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .content-wrapper {
            background: var(--white);
            border-radius: 0 0 14px 14px;
            padding: 2rem;
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.07);
            border: 1px solid rgba(73, 188, 174, 0.35);
            border-top: 3px solid #59c9bc;
        }

        .back-button {
            display: inline-flex;
            align-items: center;
            padding: 0.75rem 1.5rem;
            background: var(--primary);
            color: var(--white);
            text-decoration: none;
            border-radius: var(--radius);
            font-weight: 600;
            transition: all 0.3s ease;
            margin-bottom: 2rem;
            box-shadow: 0 2px 8px rgba(26, 35, 126, 0.2);
        }

        .back-button:hover {
            background: var(--accent);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(26, 35, 126, 0.3);
        }

        .back-button i {
            margin-right: 0.5rem;
        }

        .kb-summary {
            background: linear-gradient(135deg, #f8f9fa, #e9ecef);
            padding: 2rem;
            border-radius: var(--radius);
            margin-bottom: 2rem;
            border-left: 4px solid var(--accent);
        }

        .kb-summary h3 {
            color: var(--primary);
            margin-bottom: 1rem;
            font-size: 1.3rem;
        }

        .kb-summary ul {
            list-style: none;
            padding: 0;
        }

        .kb-summary li {
            padding: 0.5rem 0;
            padding-left: 1.5rem;
            position: relative;
        }

        .kb-summary li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--accent);
            font-weight: bold;
        }

        /* Article content styling */
        .article-content {
            line-height: 1.6;
            color: var(--text);
        }

        .article-content h1 {
            color: var(--primary);
            font-size: 2.2rem;
            margin-bottom: 1.5rem;
            font-weight: 700;
            border-bottom: 3px solid var(--accent);
            padding-bottom: 1rem;
        }

        .article-content h2 {
            color: var(--primary);
            font-size: 1.8rem;
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-weight: 600;
        }

        .article-content h3 {
            color: var(--text);
            font-size: 1.4rem;
            margin-top: 1.5rem;
            margin-bottom: 0.8rem;
            font-weight: 600;
        }

        .article-content p {
            margin-bottom: 1rem;
            font-size: 1rem;
        }

        .article-content ul, .article-content ol {
            margin-bottom: 1rem;
            padding-left: 2rem;
        }

        .article-content li {
            margin-bottom: 0.5rem;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
            border-radius: var(--radius);
            overflow: hidden;
        }

        .article-content th, .article-content td {
            padding: 1rem;
            text-align: left;
            border-bottom: 1px solid #e0e0e0;
        }

        .article-content th {
            background: var(--primary);
            color: var(--white);
            font-weight: 600;
        }

        .article-content tr:nth-child(even) {
            background: #f8f9fa;
        }

        .article-content tr:hover {
            background: rgba(26, 35, 126, 0.05);
        }

        .highlight-box {
            background: linear-gradient(135deg, #e3f2fd, #f3e5f5);
            padding: 1.5rem;
            border-radius: var(--radius);
            border-left: 4px solid var(--accent);
            margin: 1.5rem 0;
        }

        .highlight-box h4 {
            color: var(--primary);
            margin-bottom: 1rem;
            font-size: 1.2rem;
        }

        .cost-comparison {
            background: linear-gradient(135deg, #e8f5e8, #f0f8f0);
            padding: 2rem;
            border-radius: var(--radius);
            margin: 2rem 0;
            border: 2px solid var(--accent);
        }

        .cost-comparison h3 {
            color: var(--primary);
            text-align: center;
            margin-bottom: 1.5rem;
        }

        .savings-highlight {
            background: linear-gradient(135deg, #fff3cd, #ffeaa7);
            padding: 1rem;
            border-radius: var(--radius);
            text-align: center;
            font-weight: 600;
            color: var(--primary);
            margin: 1rem 0;
        }

        @media (max-width: 768px) {
            .kb-container {
                padding: 1rem;
                margin: 1rem;
            }

            .kb-header h1 {
                font-size: 2rem;
            }

            .tab-buttons {
                grid-template-columns: 1fr;
                gap: 0.8rem;
                margin-bottom: 0.5rem;
            }

            .tab-button {
                min-height: 100px;
                border-radius: 10px;
                padding: 0.85rem 0.8rem;
            }

            .tab-button.active {
                border-radius: 12px;
                transform: translateY(-2px);
                margin-bottom: 0;
            }

            .tab-button .button-icon {
                font-size: 1.7rem;
            }

            .tab-button .button-title {
                font-size: 1rem;
            }

            .article-content h1 {
                font-size: 1.8rem;
            }

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

            .article-content table {
                font-size: 0.9rem;
            }

            .article-content th, .article-content td {
                padding: 0.5rem;
            }
        }