/* Base Variables & Reset */
        :root {
            --primary: #4f46e5;
            --primary-light: #818cf8;
            --secondary: #9333ea;
            --accent: #f43f5e;
            --gradient: linear-gradient(135deg, #4f46e5, #9333ea, #ec4899);
            --gradient-hover: linear-gradient(135deg, #4338ca, #7e22ce, #db2777);
            --bg-main: #f8fafc;
            --bg-card: #ffffff;
            --text-main: #0f172a;
            --text-muted: #475569;
            --border-color: #e2e8f0;
            --container-width: 1200px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--bg-main);
            color: var(--text-main);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* Utility Classes */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        .section {
            padding: 80px 0;
        }

        .section-title {
            text-align: center;
            font-size: 2.2rem;
            margin-bottom: 15px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.025em;
        }

        .section-subtitle {
            text-align: center;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 50px auto;
            font-size: 1.1rem;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 9999px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            font-size: 1rem;
        }

        .btn-primary {
            background: var(--gradient);
            color: #ffffff;
            box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
            background: var(--gradient-hover);
        }

        .btn-outline {
            background: transparent;
            color: var(--text-main);
            border: 2px solid var(--border-color);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }

        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 9999px;
            font-size: 0.85rem;
            font-weight: 600;
            background: rgba(79, 70, 229, 0.1);
            color: var(--primary);
            margin-bottom: 15px;
        }

        /* Header Navigation */
        header {
            background-color: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            transition: var(--transition);
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            color: var(--text-main);
            font-weight: 700;
            font-size: 1.3rem;
        }

        .ai-page-logo {
            height: 35px;
            width: auto;
        }

        .nav-links {
            display: flex;
            gap: 25px;
            align-items: center;
            list-style: none;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--text-muted);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
        }

        .nav-links a:hover {
            color: var(--primary);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-main);
        }

        /* Hero Section (No Image) */
        .hero {
            padding: 160px 0 100px 0;
            background: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.05) 0%, rgba(147, 51, 234, 0.05) 90%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -10%;
            left: -10%;
            width: 300px;
            height: 300px;
            background: var(--gradient);
            filter: blur(150px);
            opacity: 0.15;
            border-radius: 50%;
            pointer-events: none;
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1.25;
            margin-bottom: 25px;
            background: var(--gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -0.03em;
        }

        .hero p {
            font-size: 1.25rem;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 40px auto;
        }

        .hero-btn-group {
            display: flex;
            justify-content: center;
            gap: 15px;
            flex-wrap: wrap;
            margin-bottom: 60px;
        }

        /* Statistics Cards */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 25px 20px;
            border-radius: 16px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 20px -5px rgba(0, 0, 0, 0.1);
        }

        .stat-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* Platform Introduction */
        .intro-section {
            background-color: #ffffff;
        }

        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .intro-content h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            font-weight: 700;
        }

        .intro-content p {
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 30px;
        }

        .intro-feat-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
            color: var(--text-main);
        }

        .intro-feat-icon {
            color: var(--primary);
            font-size: 1.2rem;
        }

        /* AIGC Services Grid */
        .services-section {
            background-color: var(--bg-main);
        }

        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 35px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .service-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--gradient);
            opacity: 0;
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.05);
        }

        .service-card:hover::after {
            opacity: 1;
        }

        .service-icon {
            width: 50px;
            height: 50px;
            border-radius: 12px;
            background: rgba(79, 70, 229, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.5rem;
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .service-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 15px;
        }

        /* Tags Cloud for Supported Models */
        .models-box {
            margin-top: 40px;
            padding: 25px;
            background: rgba(255, 255, 255, 0.6);
            border-radius: 16px;
            border: 1px dashed var(--border-color);
        }

        .models-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-muted);
            margin-bottom: 15px;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 6px 14px;
            border-radius: 9999px;
            font-size: 0.85rem;
            color: var(--text-main);
            font-weight: 500;
            transition: var(--transition);
        }

        .tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background-color: rgba(79, 70, 229, 0.05);
        }

        /* One-stop AIGC Creation */
        .onestop-section {
            background-color: #ffffff;
        }

        .onestop-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .onestop-card {
            background-color: var(--bg-main);
            border-radius: 16px;
            padding: 25px;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .onestop-card:hover {
            background-color: var(--bg-card);
            border-color: var(--primary-light);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
        }

        .onestop-card h4 {
            font-size: 1.15rem;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .onestop-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* Industry Solutions */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .solution-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            transition: var(--transition);
        }

        .solution-card:hover {
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
            border-color: var(--primary-light);
        }

        .solution-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .solution-card ul {
            list-style: none;
        }

        .solution-card li {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 8px;
            position: relative;
            padding-left: 15px;
        }

        .solution-card li::before {
            content: "•";
            color: var(--primary);
            position: absolute;
            left: 0;
            font-weight: bold;
        }

        /* Service Network & Standard Flow */
        .flow-section {
            background-color: var(--bg-card);
        }

        .flow-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            position: relative;
            margin-top: 40px;
        }

        .flow-step {
            position: relative;
            padding-top: 30px;
        }

        .flow-step::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background-color: var(--border-color);
            z-index: 1;
        }

        .flow-step::after {
            content: '';
            position: absolute;
            top: -6px;
            left: 0;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--gradient);
            z-index: 2;
        }

        .flow-step-num {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--primary);
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .flow-step h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }

        .flow-step p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* Compare Table Section */
        .compare-section {
            background-color: var(--bg-main);
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            background-color: var(--bg-card);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 800px;
        }

        .compare-table th, .compare-table td {
            padding: 16px 24px;
            border-bottom: 1px solid var(--border-color);
        }

        .compare-table th {
            background-color: #f1f5f9;
            font-weight: 700;
            color: var(--text-main);
        }

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

        .compare-table td strong {
            color: var(--primary);
        }

        .score-box {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-top: 30px;
            padding: 20px;
            background: rgba(79, 70, 229, 0.05);
            border-radius: 12px;
            border: 1px solid rgba(79, 70, 229, 0.15);
        }

        .score-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
        }

        .score-info h4 {
            font-size: 1.1rem;
            margin-bottom: 4px;
        }

        .score-info p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* Token Price Reference Table */
        .token-section {
            background-color: var(--bg-card);
        }

        /* Training & Certification */
        .training-section {
            background-color: var(--bg-main);
        }

        .training-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .training-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            transition: var(--transition);
        }

        .training-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 20px rgba(0, 0, 0, 0.05);
            border-color: var(--primary-light);
        }

        .training-tag {
            display: inline-block;
            padding: 3px 8px;
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: bold;
            background: rgba(147, 51, 234, 0.1);
            color: var(--secondary);
            margin-bottom: 12px;
        }

        .training-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .training-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 15px;
        }

        /* Case Show Center (Contain prescribed images) */
        .cases-section {
            background-color: var(--bg-card);
        }

        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background-color: var(--bg-main);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }

        .case-img-wrap {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background-color: #e2e8f0;
        }

        .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .case-card:hover .case-img-wrap img {
            transform: scale(1.05);
        }

        .case-info {
            padding: 20px;
        }

        .case-info h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            font-weight: 700;
        }

        .case-info p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* User Testimonials */
        .reviews-section {
            background-color: var(--bg-main);
        }

        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .review-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .review-text {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-style: italic;
            margin-bottom: 20px;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .review-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background-color: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #ffffff;
            font-weight: bold;
        }

        .review-meta h5 {
            font-size: 0.95rem;
            font-weight: 700;
        }

        .review-meta span {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* Article List (Required articles link integration) */
        .articles-section {
            background-color: var(--bg-card);
        }

        .articles-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .article-item {
            background-color: var(--bg-main);
            border-radius: 12px;
            padding: 20px;
            border: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition);
        }

        .article-item:hover {
            border-color: var(--primary);
            background-color: #ffffff;
        }

        .article-info h4 {
            font-size: 1rem;
            margin-bottom: 5px;
            font-weight: 600;
        }

        .article-info p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .article-link {
            color: var(--primary);
            text-decoration: none;
            font-weight: bold;
            font-size: 0.9rem;
            white-space: nowrap;
        }

        /* AI Encyclopedia Section */
        .encyclopedia-section {
            background-color: var(--bg-main);
        }

        .encyclopedia-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .encyclopedia-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 20px;
        }

        .encyclopedia-card h4 {
            font-size: 1rem;
            margin-bottom: 8px;
            color: var(--primary);
        }

        .encyclopedia-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* FAQ Section (Accordion) */
        .faq-section {
            background-color: var(--bg-card);
        }

        .faq-accordion {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: 15px 0;
        }

        .faq-header {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            text-align: left;
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-main);
            padding: 10px 0;
            cursor: pointer;
            outline: none;
        }

        .faq-header span {
            transition: var(--transition);
        }

        .faq-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .faq-content p {
            padding: 10px 0;
        }

        .faq-item.active .faq-header span {
            transform: rotate(45deg);
            color: var(--primary);
        }

        /* Self-Troubleshoot section inside Help Center */
        .troubleshoot-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            max-width: 800px;
            margin: 30px auto 0 auto;
        }

        .troubleshoot-card {
            background-color: var(--bg-main);
            border: 1px solid var(--border-color);
            padding: 20px;
            border-radius: 12px;
            text-align: center;
        }

        .troubleshoot-card h4 {
            margin-bottom: 10px;
            font-size: 1rem;
        }

        .troubleshoot-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Form & Contact Us */
        .contact-section {
            background-color: var(--bg-main);
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
        }

        .contact-info-wrap {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .contact-details {
            margin-bottom: 30px;
        }

        .contact-detail-item {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 20px;
        }

        .contact-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: rgba(79, 70, 229, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
        }

        .qr-codes {
            display: flex;
            gap: 30px;
            margin-top: 20px;
        }

        .qr-item {
            text-align: center;
        }

        .qr-item img {
            width: 120px;
            height: 120px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 8px;
        }

        .qr-item p {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-muted);
        }

        /* Form Style */
        .form-wrap {
            background-color: var(--bg-card);
            padding: 40px;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-label {
            display: block;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-main);
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            background-color: var(--bg-main);
            font-size: 0.95rem;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background-color: #ffffff;
            box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
        }

        textarea.form-control {
            resize: vertical;
            min-height: 120px;
        }

        /* Floating Sidebar Customer Service */
        .floating-kf {
            position: fixed;
            right: 25px;
            bottom: 25px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .kf-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--gradient);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            position: relative;
        }

        .kf-btn:hover {
            transform: scale(1.1);
        }

        .kf-tooltip {
            position: absolute;
            right: 65px;
            top: 50%;
            transform: translateY(-50%) translateX(10px);
            background-color: var(--bg-card);
            color: var(--text-main);
            padding: 10px;
            border-radius: 8px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
            border: 1px solid var(--border-color);
            white-space: nowrap;
            opacity: 0;
            pointer-events: none;
            transition: var(--transition);
        }

        .kf-tooltip img {
            width: 100px;
            height: 100px;
            display: block;
            margin: 0 auto 5px auto;
        }

        .kf-tooltip p {
            font-size: 0.8rem;
            text-align: center;
            font-weight: bold;
        }

        .kf-btn:hover .kf-tooltip {
            opacity: 1;
            transform: translateY(-50%) translateX(0);
        }

        /* Footer */
        footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px 0;
            border-top: 1px solid #1e293b;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand h3 {
            color: #ffffff;
            margin-bottom: 15px;
            font-size: 1.4rem;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .footer-col h4 {
            color: #ffffff;
            margin-bottom: 15px;
            font-size: 1rem;
            font-weight: 600;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 0.85rem;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: #ffffff;
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            font-size: 0.85rem;
        }

        .friend-links {
            margin-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .friend-links a {
            color: #64748b;
            text-decoration: none;
            transition: var(--transition);
        }

        .friend-links a:hover {
            color: #ffffff;
        }

        /* Responsive Design */
        @media (max-width: 1024px) {
            .stats-grid, .services-grid, .onestop-grid, .solutions-grid, .training-grid, .cases-grid, .reviews-grid, .encyclopedia-grid, .troubleshoot-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .intro-grid, .contact-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--bg-card);
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }

            .nav-links.active {
                display: flex;
            }

            .menu-toggle {
                display: block;
            }

            .hero h1 {
                font-size: 2.2rem;
            }

            .stats-grid, .onestop-grid, .troubleshoot-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .services-grid, .solutions-grid, .training-grid, .cases-grid, .reviews-grid, .encyclopedia-grid, .articles-list {
                grid-template-columns: 1fr;
            }

            .flow-timeline {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .flow-step::before {
                width: 4px;
                height: 100%;
                top: 0;
                left: 6px;
            }

            .flow-step::after {
                left: 0;
                top: 10px;
            }

            .flow-step {
                padding-left: 30px;
                padding-top: 0;
            }

            .footer-grid {
                grid-template-columns: 1fr;
            }

            .form-wrap {
                padding: 25px;
            }
        }

        @media (max-width: 480px) {
            .stats-grid, .onestop-grid, .troubleshoot-grid {
                grid-template-columns: 1fr;
            }
        }