:root {
            --primary: #0052d9;
            --primary-light: #e8f2ff;
            --accent: #00f2fe;
            --accent-purple: #7000ff;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --bg-main: #ffffff;
            --bg-section: #f8fafc;
            --border-color: #e2e8f0;
            --container-width: 1200px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* Reset */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-main);
            background-color: var(--bg-main);
        }
        body {
            line-height: 1.6;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        /* Utilities */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 90px 0;
        }
        .section-light {
            background-color: var(--bg-section);
        }
        .section-title {
            text-align: center;
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .section-subtitle {
            text-align: center;
            font-size: 1.1rem;
            color: var(--text-muted);
            margin-bottom: 50px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        .badge {
            display: inline-block;
            padding: 6px 16px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            border-radius: 50px;
            margin-bottom: 16px;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 30px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition);
            border: none;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
            color: #ffffff !important;
            box-shadow: 0 4px 15px rgba(0, 82, 217, 0.2);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 82, 217, 0.35);
        }
        .btn-secondary {
            background-color: var(--primary-light);
            color: var(--primary) !important;
            border: 1px solid rgba(0, 82, 217, 0.15);
        }
        .btn-secondary:hover {
            background-color: #dbeaff;
            transform: translateY(-2px);
        }

        /* Header Navigation */
        header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .ai-page-logo {
            height: 38px;
            width: auto;
        }
        .logo-text {
            font-size: 1.25rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 24px;
        }
        nav ul li a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-main);
        }
        nav ul li a:hover {
            color: var(--primary);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 5px;
        }

        /* Hero Section (No Image) */
        .hero {
            position: relative;
            padding: 120px 0 100px 0;
            background: radial-gradient(circle at 80% 20%, rgba(0, 242, 254, 0.08) 0%, transparent 50%),
                        radial-gradient(circle at 10% 80%, rgba(112, 0, 255, 0.06) 0%, transparent 50%),
                        linear-gradient(180deg, #fdfdff 0%, #f8fafc 100%);
            text-align: center;
            overflow: hidden;
        }
        .hero-badge-container {
            display: flex;
            justify-content: center;
            margin-bottom: 24px;
        }
        .hero-badge {
            background: linear-gradient(90deg, rgba(0, 82, 217, 0.08) 0%, rgba(112, 0, 255, 0.08) 100%);
            border: 1px solid rgba(0, 82, 217, 0.15);
            padding: 8px 20px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--primary);
        }
        h1.hero-title {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -1px;
            background: linear-gradient(135deg, #0b1a30 0%, #0052d9 50%, #7000ff 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-desc {
            font-size: 1.25rem;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 35px auto;
            line-height: 1.7;
        }
        .hero-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            margin-bottom: 40px;
        }
        /* Grid background pattern for Hero instead of images */
        .hero-grid-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: linear-gradient(to right, rgba(0, 82, 217, 0.03) 1px, transparent 1px),
                              linear-gradient(to bottom, rgba(0, 82, 217, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
            z-index: 0;
        }
        .hero .container {
            position: relative;
            z-index: 1;
        }

        /* Stats Cards */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 40px;
        }
        .stats-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }
        .stats-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 82, 217, 0.08);
            border-color: rgba(0, 82, 217, 0.2);
        }
        .stats-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
            line-height: 1;
        }
        .stats-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* About Us & Platform Intro */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .about-content h3 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 20px;
            color: #0b1a30;
        }
        .about-features {
            margin-top: 30px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .about-feature-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }
        .about-feature-icon {
            color: var(--primary);
            flex-shrink: 0;
            margin-top: 3px;
        }
        .about-feature-text h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .about-feature-text p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Service Cards (Capability) */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .service-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 30px rgba(0, 82, 217, 0.1);
            border-color: rgba(0, 82, 217, 0.3);
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(to bottom, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .service-card:hover::before {
            opacity: 1;
        }
        .service-icon {
            width: 50px;
            height: 50px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }
        .service-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .service-desc {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 16px;
        }
        .service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .service-tag {
            font-size: 0.75rem;
            background: #f1f5f9;
            color: var(--text-muted);
            padding: 4px 10px;
            border-radius: 4px;
        }

        /* Model Cloud (Tag Cloud) */
        .model-cloud-container {
            background: linear-gradient(135deg, #0b1a30 0%, #002b6e 100%);
            color: #ffffff;
            border-radius: 20px;
            padding: 40px;
            text-align: center;
            margin-top: 50px;
        }
        .model-cloud-title {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: #ffffff;
        }
        .model-cloud-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            max-width: 900px;
            margin: 0 auto;
        }
        .model-tag {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: rgba(255, 255, 255, 0.9);
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .model-tag:hover {
            background: #ffffff;
            color: var(--primary);
            transform: scale(1.05);
        }

        /* Workflow Steps */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .step-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px 24px;
            position: relative;
            z-index: 2;
        }
        .step-num {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 3rem;
            font-weight: 900;
            line-height: 1;
            color: rgba(0, 82, 217, 0.06);
        }
        .step-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-top: 15px;
            margin-bottom: 10px;
        }
        .step-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* Customer Cases */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .case-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }
        .case-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
        }
        .case-img-wrap {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: #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-badge {
            position: absolute;
            top: 15px;
            left: 15px;
            background: rgba(11, 26, 48, 0.8);
            backdrop-filter: blur(5px);
            color: #ffffff;
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .case-body {
            padding: 24px;
        }
        .case-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .case-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .case-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-top: 1px solid var(--border-color);
            padding-top: 16px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .case-rating {
            color: #ff9800;
            font-weight: 600;
        }

        /* Comparison Board */
        .comparison-table-wrap {
            overflow-x: auto;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
            background: #ffffff;
        }
        table.comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 800px;
        }
        .comparison-table th, .comparison-table td {
            padding: 20px 24px;
            border-bottom: 1px solid var(--border-color);
        }
        .comparison-table th {
            background-color: var(--bg-section);
            font-weight: 700;
        }
        .comparison-table tr:last-child td {
            border-bottom: none;
        }
        .comparison-table .highlight-col {
            background-color: rgba(0, 82, 217, 0.02);
            font-weight: 600;
        }
        .comparison-table th.highlight-col {
            background-color: var(--primary-light);
            color: var(--primary);
        }
        .status-check {
            color: #10b981;
            font-weight: bold;
        }
        .status-cross {
            color: #ef4444;
        }
        .comp-score-box {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
            color: #ffffff;
            padding: 30px;
            border-radius: 16px;
            margin-top: 30px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
        }
        .comp-score-left h4 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .comp-score-left p {
            opacity: 0.9;
            font-size: 0.95rem;
        }
        .comp-score-right {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        .comp-score-num {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1;
        }

        /* Token Price Reference */
        .token-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .token-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
        }
        .token-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 16px;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 12px;
        }
        .token-name {
            font-weight: 700;
            font-size: 1.1rem;
        }
        .token-price {
            color: #10b981;
            font-weight: 700;
        }
        .token-detail {
            font-size: 0.85rem;
            color: var(--text-muted);
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        /* Training & Certification */
        .training-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .training-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .training-item {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 16px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition);
        }
        .training-item:hover {
            border-color: var(--primary);
            transform: translateX(4px);
        }
        .training-info h4 {
            font-size: 1.05rem;
            font-weight: 700;
        }
        .training-info p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .training-cert {
            font-size: 0.8rem;
            background: #fef3c7;
            color: #d97706;
            padding: 4px 10px;
            border-radius: 4px;
            font-weight: 600;
        }

        /* FAQ Accordion */
        .faq-list {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background: #ffffff;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 700;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: #ffffff;
            user-select: none;
        }
        .faq-question:hover {
            background-color: var(--bg-section);
        }
        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            color: var(--text-muted);
            font-size: 0.95rem;
            border-top: 0 solid var(--border-color);
        }
        .faq-item.active {
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(0, 82, 217, 0.05);
        }
        .faq-item.active .faq-answer {
            padding: 18px 24px;
            max-height: 200px;
            border-top-width: 1px;
        }
        .faq-icon-arrow {
            transition: transform 0.3s;
        }
        .faq-item.active .faq-icon-arrow {
            transform: rotate(180deg);
        }

        /* Testimonials */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .review-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.02);
            transition: var(--transition);
        }
        .review-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
        }
        .review-rating {
            color: #ffb800;
            font-size: 1.1rem;
            margin-bottom: 12px;
        }
        .review-text {
            font-size: 0.95rem;
            color: var(--text-main);
            margin-bottom: 20px;
            font-style: italic;
        }
        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .review-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
        }
        .review-info h5 {
            font-size: 0.95rem;
            font-weight: 700;
        }
        .review-info p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* Articles (Knowledge Base) */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }
        .article-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 20px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .article-card:hover {
            border-color: var(--primary);
            box-shadow: 0 8px 16px rgba(0, 82, 217, 0.05);
        }
        .article-meta {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-bottom: 8px;
        }
        .article-title {
            font-size: 0.95rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 16px;
        }
        .article-link {
            font-size: 0.85rem;
            color: var(--primary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* Contact & Lead Form & Agent */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
        }
        .contact-info-wrap {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .contact-agent-card {
            background: var(--primary-light);
            border: 1px solid rgba(0, 82, 217, 0.15);
            border-radius: 16px;
            padding: 30px;
            margin-bottom: 30px;
        }
        .agent-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .agent-desc {
            font-size: 0.95rem;
            color: var(--text-main);
            margin-bottom: 16px;
        }
        .contact-details {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .contact-item {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1rem;
        }
        .contact-icon {
            color: var(--primary);
            font-weight: 700;
        }
        .form-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 40px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-label {
            display: block;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .form-input, .form-select, .form-textarea {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background-color: var(--bg-section);
            color: var(--text-main);
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .form-input:focus, .form-select:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--primary);
            background-color: #ffffff;
            box-shadow: 0 0 0 3px rgba(0, 82, 217, 0.1);
        }

        /* Footer */
        footer {
            background-color: #0b1a30;
            color: rgba(255, 255, 255, 0.8);
            padding: 80px 0 30px 0;
            font-size: 0.9rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 50px;
            margin-bottom: 50px;
        }
        .footer-logo-wrap {
            margin-bottom: 20px;
        }
        .footer-desc {
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 20px;
            max-width: 400px;
        }
        .footer-title {
            color: #ffffff;
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
        }
        .footer-links a:hover {
            color: #ffffff;
            padding-left: 4px;
        }
        .footer-qr-group {
            display: flex;
            gap: 20px;
            align-items: center;
        }
        .footer-qr {
            width: 100px;
            height: 100px;
            background: #ffffff;
            padding: 5px;
            border-radius: 8px;
        }
        .footer-qr img {
            width: 100%;
            height: 100%;
        }
        .footer-meta {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.8rem;
        }
        .footer-friends {
            margin-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 20px;
            font-size: 0.8rem;
        }
        .footer-friends-title {
            color: rgba(255, 255, 255, 0.4);
            margin-bottom: 10px;
        }
        .footer-friends-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }
        .footer-friends-links a {
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-friends-links a:hover {
            color: #ffffff;
        }

        /* Floating Contact Widget */
        .floating-widget {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: #ffffff;
            box-shadow: 0 4px 15px rgba(0,0,0,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            position: relative;
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }
        .float-btn:hover {
            transform: scale(1.05);
            border-color: var(--primary);
        }
        .float-kefu {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
            color: #ffffff;
            border: none;
        }
        .kefu-popover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 16px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            display: none;
            width: 220px;
            text-align: center;
            color: var(--text-main);
        }
        .float-btn:hover .kefu-popover {
            display: block;
        }
        .kefu-popover img {
            width: 120px;
            height: 120px;
            margin: 0 auto 10px auto;
        }
        .kefu-popover p {
            font-size: 0.8rem;
            margin-bottom: 4px;
            font-weight: 500;
        }

        /* Responsive Design */
        @media (max-width: 1024px) {
            .stats-grid, .services-grid, .steps-grid, .case-grid, .token-grid, .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .article-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .about-grid, .training-grid, .contact-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            h1.hero-title {
                font-size: 2.2rem;
            }
            .hero-desc {
                font-size: 1.05rem;
            }
            nav {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: #ffffff;
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                box-shadow: 0 4px 12px rgba(0,0,0,0.05);
            }
            nav.active {
                display: block;
            }
            nav ul {
                flex-direction: column;
                gap: 15px;
            }
            .menu-toggle {
                display: block;
            }
            .stats-grid, .services-grid, .steps-grid, .case-grid, .token-grid, .reviews-grid, .article-grid {
                grid-template-columns: 1fr;
            }
        }