/* CSS Reset & Variables */
        :root {
            --primary: #0052ff;
            --primary-bright: #00f2fe;
            --secondary: #ff6a00;
            --secondary-bright: #ff007f;
            --dark-bg: #0b0f19;
            --light-bg: #f8fafc;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --white: #ffffff;
            --border-color: #e2e8f0;
            --card-shadow: 0 10px 30px -10px rgba(0, 82, 255, 0.08);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            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(--light-bg);
        }

        body {
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* Layout Container */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Typography */
        h1, h2, h3, h4 {
            font-weight: 700;
            line-height: 1.3;
        }

        .section-title {
            font-size: 2.2rem;
            text-align: center;
            margin-bottom: 15px;
            color: var(--text-main);
            position: relative;
        }

        .section-subtitle {
            font-size: 1.1rem;
            text-align: center;
            color: var(--text-muted);
            margin-bottom: 50px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), #4facfe);
            color: var(--white);
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 82, 255, 0.4);
        }

        .btn-secondary {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-bright));
            color: var(--white);
            box-shadow: 0 4px 15px rgba(255, 106, 0, 0.3);
        }

        .btn-secondary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(255, 106, 0, 0.4);
        }

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

        .btn-outline:hover {
            background: var(--primary);
            color: var(--white);
        }

        /* Header Navigation */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            transition: var(--transition);
        }

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

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .ai-page-logo {
            height: 40px;
            width: auto;
        }

        .nav-menu {
            display: flex;
            gap: 20px;
            list-style: none;
        }

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

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

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

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
        }

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--text-main);
            transition: var(--transition);
        }

        /* Hero Section (No Image, Bright Tech Style) */
        .hero {
            padding: 160px 0 100px;
            background: radial-gradient(circle at 90% 10%, rgba(0, 242, 254, 0.15) 0%, transparent 40%),
                        radial-gradient(circle at 10% 90%, rgba(255, 106, 0, 0.1) 0%, transparent 40%),
                        var(--white);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(180deg, rgba(255,255,255,0) 0%, var(--light-bg) 100%);
            pointer-events: none;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(0, 82, 255, 0.08);
            color: var(--primary);
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 25px;
            border: 1px solid rgba(0, 82, 255, 0.15);
            animation: pulse 2s infinite;
        }

        .hero-title {
            font-size: 3rem;
            max-width: 900px;
            margin: 0 auto 20px;
            background: linear-gradient(135deg, #0f172a 30%, var(--primary) 70%, var(--primary-bright));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.25rem;
            color: var(--text-muted);
            max-width: 750px;
            margin: 0 auto 35px;
        }

        .hero-ctas {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 50px;
        }

        /* Stats Cards */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 40px;
        }

        .stat-card {
            background: rgba(255, 255, 255, 0.8);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 25px 20px;
            backdrop-filter: blur(10px);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
            box-shadow: var(--card-shadow);
        }

        .stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }

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

        /* Sections General */
        .section {
            padding: 90px 0;
            position: relative;
        }

        .section-white {
            background-color: var(--white);
        }

        .section-light {
            background-color: var(--light-bg);
        }

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

        .service-card {
            background: var(--white);
            border-radius: 20px;
            padding: 40px 30px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 5px;
            height: 100%;
            background: linear-gradient(180deg, var(--primary), var(--primary-bright));
            opacity: 0;
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--card-shadow);
            border-color: transparent;
        }

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

        .service-icon {
            width: 60px;
            height: 60px;
            border-radius: 14px;
            background: rgba(0, 82, 255, 0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.5rem;
            margin-bottom: 25px;
        }

        .service-card h3 {
            margin-bottom: 15px;
            font-size: 1.3rem;
        }

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

        /* Models Showcase */
        .model-tags-container {
            margin-top: 40px;
            background: var(--white);
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: 20px;
        }

        .model-tags-title {
            font-size: 1.1rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 20px;
            color: var(--text-main);
        }

        .model-tags-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
        }

        .model-tag {
            padding: 8px 18px;
            background: var(--light-bg);
            border: 1px solid var(--border-color);
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-main);
            transition: var(--transition);
        }

        .model-tag:hover {
            background: var(--primary);
            color: var(--white);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* Steps Flow */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 25px;
            position: relative;
        }

        .step-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px 20px;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .step-num {
            width: 45px;
            height: 45px;
            background: linear-gradient(135deg, var(--primary), #4facfe);
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            margin: 0 auto 20px;
            box-shadow: 0 4px 10px rgba(0, 82, 255, 0.2);
        }

        .step-card h4 {
            margin-bottom: 10px;
            font-size: 1.1rem;
        }

        .step-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
        }

        /* Compare Section & Table */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            background: var(--white);
            border-radius: 20px;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
        }

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

        .compare-table th, .compare-table td {
            padding: 18px 24px;
            border-bottom: 1px solid var(--border-color);
        }

        .compare-table th {
            background-color: #f8fafc;
            font-weight: 700;
            color: var(--text-main);
        }

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

        .compare-table tr.highlight-row {
            background-color: rgba(0, 82, 255, 0.02);
        }

        .badge-star {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            background: linear-gradient(135deg, #f59e0b, #d97706);
            color: var(--white);
            padding: 4px 10px;
            border-radius: 12px;
            font-size: 0.8rem;
            font-weight: 700;
        }

        .score-pill {
            font-weight: 800;
            color: var(--secondary);
            font-size: 1.1rem;
        }

        /* Token 比价 */
        .token-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .token-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 25px;
            text-align: center;
            transition: var(--transition);
        }

        .token-card:hover {
            border-color: var(--primary);
            box-shadow: var(--card-shadow);
        }

        .token-name {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .token-price {
            font-size: 1.6rem;
            color: var(--primary);
            font-weight: 800;
            margin-bottom: 5px;
        }

        .token-unit {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 15px;
        }

        /* Cases Grid & Images */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            overflow: hidden;
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--card-shadow);
        }

        .case-img-container {
            width: 100%;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background-color: #eaeaea;
        }

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

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

        .case-content {
            padding: 25px;
        }

        .case-tag {
            display: inline-block;
            padding: 4px 10px;
            background: rgba(0, 82, 255, 0.05);
            color: var(--primary);
            border-radius: 8px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .case-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .case-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
        }

        /* Comments Slider/Grid */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .comment-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 30px;
            position: relative;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.02);
        }

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

        .comment-user {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .user-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: linear-gradient(135deg, #e2e8f0, #cbd5e1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--text-main);
        }

        .user-info h5 {
            font-size: 0.95rem;
            font-weight: 700;
        }

        .user-info p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* Form Section */
        .form-section-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .form-info h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
        }

        .form-info p {
            color: var(--text-muted);
            margin-bottom: 25px;
        }

        .form-features {
            list-style: none;
        }

        .form-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
            font-weight: 500;
        }

        .form-features li::before {
            content: '✓';
            color: #10b981;
            font-weight: 700;
        }

        .form-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 24px;
            padding: 40px;
            box-shadow: var(--card-shadow);
        }

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

        .form-group label {
            display: block;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 0.95rem;
            transition: var(--transition);
            outline: none;
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 82, 255, 0.1);
        }

        /* FAQ Accordion */
        .faq-container {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            margin-bottom: 15px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-trigger {
            width: 100%;
            padding: 20px 25px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: none;
            border: none;
            text-align: left;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
        }

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

        .faq-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: #fafbfc;
        }

        .faq-content-inner {
            padding: 20px 25px;
            border-top: 1px solid var(--border-color);
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .faq-item.active .faq-content {
            max-height: 200px; /* Adjust dynamic or high enough */
        }

        .faq-item.active .faq-icon {
            transform: rotate(45px);
        }

        /* Articles Grid */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }

        .article-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 20px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            transition: var(--transition);
            text-decoration: none;
            color: inherit;
        }

        .article-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
            box-shadow: var(--card-shadow);
        }

        .article-title {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 15px;
            line-height: 1.4;
            color: var(--text-main);
        }

        .article-card:hover .article-title {
            color: var(--primary);
        }

        .article-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* Contact Details & QR */
        .contact-layout {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
        }

        .contact-info-panel {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 40px;
        }

        .contact-info-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
            margin-top: 30px;
        }

        .contact-item-box {
            display: flex;
            align-items: flex-start;
            gap: 15px;
        }

        .contact-icon-box {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(0, 82, 255, 0.05);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        .contact-meta h5 {
            font-size: 1rem;
            margin-bottom: 5px;
        }

        .contact-meta p {
            font-size: 0.88rem;
            color: var(--text-muted);
        }

        .contact-qr-panel {
            background: linear-gradient(135deg, var(--primary), #4facfe);
            color: var(--white);
            border-radius: 20px;
            padding: 40px;
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }

        .qr-wrapper {
            background: var(--white);
            padding: 15px;
            border-radius: 16px;
            margin: 20px 0;
            width: 180px;
            height: 180px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .qr-wrapper img {
            max-width: 100%;
            height: auto;
        }

        /* Footer & Friend Links */
        .footer {
            background-color: var(--dark-bg);
            color: #94a3b8;
            padding: 80px 0 30px;
            border-top: 1px solid #1e293b;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 50px;
        }

        .footer-logo-desc h4 {
            color: var(--white);
            font-size: 1.3rem;
            margin-bottom: 15px;
        }

        .footer-logo-desc p {
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .footer-links-title {
            color: var(--white);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 20px;
        }

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

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

        .footer-links-list a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .footer-links-list a:hover {
            color: var(--white);
        }

        .friend-links-box {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            margin-bottom: 30px;
        }

        .friend-links-title {
            color: var(--white);
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 15px;
        }

        .friend-links-list {
            display: flex;
            flex-wrap: wrap;
            gap: 15px 25px;
        }

        .friend-links-list a {
            color: #64748b;
            text-decoration: none;
            font-size: 0.85rem;
            transition: var(--transition);
        }

        .friend-links-list a:hover {
            color: var(--primary-bright);
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
        }

        /* Float Customer Service */
        .float-kefu {
            position: fixed;
            right: 30px;
            bottom: 30px;
            background: var(--white);
            border: 1px solid var(--border-color);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            border-radius: 50%;
            width: 60px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            z-index: 999;
            transition: var(--transition);
        }

        .float-kefu:hover {
            transform: scale(1.1);
        }

        .float-kefu svg {
            width: 28px;
            height: 28px;
            fill: var(--primary);
        }

        .kefu-card-pop {
            position: fixed;
            right: 100px;
            bottom: 30px;
            width: 260px;
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            padding: 20px;
            display: none;
            flex-direction: column;
            align-items: center;
            z-index: 1000;
            animation: slideIn 0.3s ease;
        }

        .kefu-card-pop.active {
            display: flex;
        }

        .kefu-card-pop img {
            width: 150px;
            height: 150px;
            margin-bottom: 12px;
        }

        .kefu-card-pop h4 {
            font-size: 1rem;
            margin-bottom: 5px;
        }

        .kefu-card-pop p {
            font-size: 0.8rem;
            color: var(--text-muted);
            text-align: center;
        }

        /* Media Queries (Responsive) */
        @media (max-width: 1024px) {
            .services-grid, .cases-grid, .comments-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .token-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .articles-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .contact-layout {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

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

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

            .menu-toggle {
                display: flex;
            }

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

            .services-grid, .cases-grid, .comments-grid, .token-grid, .steps-grid {
                grid-template-columns: 1fr;
            }

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

            .form-section-inner {
                grid-template-columns: 1fr;
            }

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

        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }

        @keyframes slideIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }