/* ===== HELP CENTER PAGE STYLES ===== */
        .help-center-page {
            padding: 32px 0 48px;
        }

        /* Sidebar */
        .help-tree-sidebar {
            background: #fff;
            border: 1px solid #e8ecf0;
            border-radius: 12px;
            padding: 20px;
            position: sticky;
            top: 16px;
        }

        .help-tree-header {
            font-size: 1rem;
            font-weight: 700;
            color: #1a1a2e;
            padding-bottom: 12px;
            margin-bottom: 12px;
            border-bottom: 2px solid #f0f2f5;
        }

        .help-tree-search input {
            border-radius: 20px 0 0 20px;
            font-size: 0.82rem;
        }

        .help-tree-search .input-group-text {
            border-radius: 0 20px 20px 0;
            background: #f8f9fa;
            border-left: 0;
            font-size: 0.82rem;
        }

        /* Tree */
        .help-tree {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .tree-category {
            margin-bottom: 6px;
        }

        .tree-category-label {
            display: flex;
            align-items: center;
            padding: 8px 10px;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.88rem;
            color: #2d3748;
            background: #f7f8fa;
            transition: background 0.2s;
            user-select: none;
        }

        .tree-category-label:hover {
            background: #eef2ff;
        }

        .tree-arrow {
            font-size: 0.72rem;
            margin-right: 6px;
            transition: transform 0.25s;
            color: #aaa;
        }

        .tree-category.collapsed .tree-arrow {
            transform: rotate(-90deg);
        }

        .tree-children {
            list-style: none;
            padding: 4px 0 4px 18px;
            margin: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .tree-category.collapsed .tree-children {
            display: none;
        }

        .tree-item {
            padding: 6px 10px;
            border-radius: 6px;
            cursor: pointer;
            font-size: 0.84rem;
            color: #4a5568;
            transition: background 0.15s, color 0.15s;
            display: flex;
            align-items: center;
            gap: 2px;
        }

        .tree-item:hover {
            background: #eef2ff;
            color: #4361ee;
        }

        .tree-item.active {
            background: #eef2ff;
            color: #4361ee;
            font-weight: 600;
        }

        .tree-item i.bi-dot {
            font-size: 1.1rem;
            color: #cbd5e0;
        }

        .tree-item.active i.bi-dot {
            color: #4361ee;
        }

        .help-contact-cta {
            border-top: 1px solid #f0f2f5;
            padding-top: 16px;
            font-size: 0.82rem;
            color: #718096;
            text-align: center;
        }

        /* Content panel */
        .help-content-panel {
            background: #fff;
            border: 1px solid #e8ecf0;
            border-radius: 12px;
            padding: 32px 36px;
            min-height: 500px;
        }

        .faq-content-header {
            margin-bottom: 24px;
            padding-bottom: 16px;
            border-bottom: 2px solid #f0f2f5;
        }

        .faq-content-header h2 {
            font-size: 1.55rem;
            font-weight: 700;
            color: #1a1a2e;
            margin-top: 8px;
            margin-bottom: 0;
        }

        .faq-badge {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            text-transform: uppercase;
        }

        .faq-badge.ordering {
            background: #e8f4fd;
            color: #1a73e8;
        }

        .faq-badge.payment {
            background: #e6f9f0;
            color: #0f9d58;
        }

        .faq-badge.shipping {
            background: #fff8e6;
            color: #f4a100;
        }

        .faq-badge.quality {
            background: #fde8e8;
            color: #d93025;
        }

        .faq-content-body {
            font-size: 0.95rem;
            color: #4a5568;
            line-height: 1.75;
        }

        /* Contact info card */
        .contact-info-card {
            background: #f7f9ff;
            border: 1px solid #dce8ff;
            border-radius: 10px;
            padding: 16px 20px;
            margin-top: 16px;
        }

        .contact-info-title {
            font-weight: 700;
            font-size: 0.9rem;
            color: #2d3748;
            margin-bottom: 10px;
        }

        .contact-info-item {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 8px;
            font-size: 0.9rem;
        }

        .contact-info-item i {
            font-size: 1rem;
        }

        /* Steps */
        .step-list {
            margin-top: 8px;
        }

        .step-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            margin-bottom: 14px;
        }

        .step-number {
            width: 28px;
            height: 28px;
            background: #4361ee;
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.82rem;
            flex-shrink: 0;
        }

        .step-text {
            padding-top: 3px;
        }

        /* MOQ cards */
        .moq-cards {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            margin-top: 16px;
        }

        .moq-card {
            flex: 1;
            min-width: 180px;
            background: #f7f9ff;
            border: 1px solid #dce8ff;
            border-radius: 10px;
            padding: 20px;
            text-align: center;
        }

        .moq-icon {
            font-size: 2rem;
            color: #4361ee;
            margin-bottom: 8px;
        }

        .moq-label {
            font-weight: 700;
            font-size: 0.9rem;
            color: #2d3748;
            margin-bottom: 6px;
        }

        .moq-value {
            font-size: 1.4rem;
            font-weight: 800;
            color: #4361ee;
            margin-bottom: 8px;
        }

        .moq-desc {
            font-size: 0.82rem;
            color: #718096;
        }

        /* Payment methods */
        .payment-methods {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 16px;
        }

        .payment-method-item {
            display: flex;
            align-items: center;
            gap: 10px;
            background: #f7f9ff;
            border: 1px solid #dce8ff;
            border-radius: 8px;
            padding: 12px 18px;
            font-size: 0.9rem;
            font-weight: 500;
        }

        .payment-method-item i {
            font-size: 1.2rem;
        }

        /* Payment terms table */
        .payment-terms-table {
            border: 1px solid #e2e8f0;
            border-radius: 10px;
            overflow: hidden;
            margin-top: 16px;
        }

        .pt-row {
            display: flex;
            border-bottom: 1px solid #e2e8f0;
        }

        .pt-row:last-child {
            border-bottom: none;
        }

        .pt-header {
            background: #f7f9ff;
            font-weight: 700;
            font-size: 0.82rem;
            color: #4a5568;
            text-transform: uppercase;
        }

        .pt-col {
            flex: 1;
            padding: 12px 16px;
            font-size: 0.88rem;
            display: flex;
            align-items: center;
        }

        .pt-col:first-child {
            border-right: 1px solid #e2e8f0;
        }

        /* Package options */
        .package-options {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 16px;
        }

        .package-option {
            display: flex;
            align-items: center;
            gap: 16px;
            background: #f7f9ff;
            border: 1px solid #dce8ff;
            border-radius: 10px;
            padding: 14px 18px;
        }

        .package-icon {
            font-size: 1.5rem;
            flex-shrink: 0;
        }

        .package-title {
            font-weight: 700;
            font-size: 0.88rem;
            color: #2d3748;
            margin-bottom: 2px;
        }

        .package-desc {
            font-size: 0.85rem;
            color: #718096;
        }

        /* Delivery timeline */
        .delivery-timeline {
            display: flex;
            flex-direction: column;
            gap: 0;
            margin-top: 16px;
        }

        .timeline-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid #f0f2f5;
        }

        .timeline-item:last-child {
            border-bottom: none;
        }

        .timeline-badge {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .timeline-content h6 {
            font-weight: 700;
            margin-bottom: 4px;
            color: #2d3748;
        }

        .timeline-content p {
            margin: 0;
            font-size: 0.9rem;
            color: #4a5568;
        }

        /* Transport grid */
        .transport-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            margin-top: 16px;
        }

        .transport-card {
            background: #f7f9ff;
            border: 1px solid #dce8ff;
            border-radius: 10px;
            padding: 20px;
            text-align: center;
        }

        .transport-icon {
            font-size: 2rem;
            margin-bottom: 10px;
        }

        .transport-title {
            font-weight: 700;
            font-size: 0.9rem;
            color: #2d3748;
            margin-bottom: 6px;
        }

        .transport-desc {
            font-size: 0.84rem;
            color: #718096;
            line-height: 1.5;
        }

        /* Quality process */
        .quality-process {
            margin-top: 16px;
        }

        .qp-step {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: #f7f9ff;
            border: 1px solid #dce8ff;
            border-radius: 10px;
            padding: 16px;
            margin-bottom: 4px;
        }

        .qp-icon {
            font-size: 1.4rem;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .qp-title {
            font-weight: 700;
            font-size: 0.9rem;
            color: #2d3748;
            margin-bottom: 4px;
        }

        .qp-desc {
            font-size: 0.85rem;
            color: #718096;
        }

        .qp-arrow {
            text-align: center;
            padding: 2px 0;
        }

        /* Resolve steps */
        .resolve-steps {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 16px;
        }

        .rs-step {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 14px 16px;
            background: #f7f9ff;
            border-left: 4px solid #4361ee;
            border-radius: 0 8px 8px 0;
        }

        .rs-badge {
            background: #4361ee;
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: 20px;
            white-space: nowrap;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .rs-text {
            font-size: 0.9rem;
            color: #4a5568;
        }

        /* OEM options */
        .oem-options {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-top: 16px;
        }

        .oem-option {
            display: flex;
            align-items: flex-start;
            gap: 18px;
            background: #f7f9ff;
            border: 1px solid #dce8ff;
            border-radius: 10px;
            padding: 20px;
        }

        .oem-icon {
            font-size: 1.8rem;
            flex-shrink: 0;
            margin-top: 4px;
        }

        .oem-title {
            font-weight: 700;
            font-size: 0.95rem;
            color: #2d3748;
            margin-bottom: 6px;
        }

        .oem-desc {
            font-size: 0.88rem;
            color: #718096;
            margin-bottom: 8px;
        }

        .oem-list {
            font-size: 0.85rem;
            color: #4a5568;
            padding-left: 18px;
            margin: 0;
        }

        .oem-list li {
            margin-bottom: 4px;
        }

        /* Search highlight */
        .search-highlight {
            background: #fff176;
            border-radius: 2px;
        }