/* CSS Variables - 高亮度鲜活风 */
        :root {
            --primary: #0066ff; /* 活力科技蓝 */
            --primary-hover: #0052cc;
            --secondary: #00e676; /* 极光绿 */
            --accent: #ff9100; /* 活力橙 */
            --dark: #0f172a; /* 深蓝黑 */
            --light-bg: #f8fafc; /* 浅暖灰 */
            --white: #ffffff;
            --gray-100: #f1f5f9;
            --gray-200: #e2e8f0;
            --gray-600: #475569;
            --gray-700: #334155;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --shadow: 0 10px 30px -10px rgba(0, 102, 255, 0.1);
            --shadow-lg: 0 20px 40px -15px rgba(0, 102, 255, 0.15);
            --max-width: 1200px;
        }

        /* Reset */
        *, *::before, *::after {
            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(--gray-700);
            background-color: var(--light-bg);
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
        }

        /* Typography */
        h1, h2, h3, h4, h5, h6 {
            color: var(--dark);
            font-weight: 700;
            line-height: 1.3;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

        ul {
            list-style: none;
        }

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

        .section-padding {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-title {
            font-size: 2.2rem;
            position: relative;
            display: inline-block;
            margin-bottom: 15px;
            color: var(--dark);
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 2px;
        }

        .section-subtitle {
            color: var(--gray-600);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition);
            border: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), #00a2ff);
            color: var(--white);
            box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 102, 255, 0.4);
        }

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

        .btn-secondary:hover {
            background-color: var(--gray-100);
            transform: translateY(-2px);
        }

        /* Header Navigation */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            z-index: 1000;
            transition: var(--transition);
        }

        .nav-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;
        }

        .brand-name {
            font-size: 1.4rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .nav-menu {
            display: flex;
            gap: 20px;
        }

        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--gray-700);
            padding: 5px 10px;
            border-radius: 4px;
        }

        .nav-link:hover {
            color: var(--primary);
            background-color: rgba(0, 102, 255, 0.05);
        }

        .nav-btn {
            font-size: 0.9rem;
            padding: 8px 18px;
        }

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

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--dark);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* Hero Section (No Image Allowed) */
        .hero {
            padding: 160px 0 100px;
            background: radial-gradient(circle at 80% 20%, rgba(0, 230, 118, 0.1) 0%, transparent 40%),
                        radial-gradient(circle at 10% 80%, rgba(0, 102, 255, 0.08) 0%, transparent 50%),
                        var(--white);
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background-color: rgba(0, 102, 255, 0.08);
            color: var(--primary);
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 25px;
            animation: pulse 2s infinite;
        }

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

        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            letter-spacing: -1px;
            margin-bottom: 20px;
            color: var(--dark);
        }

        .hero h1 span {
            background: linear-gradient(135deg, var(--primary) 30%, var(--secondary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.25rem;
            color: var(--gray-600);
            max-width: 800px;
            margin: 0 auto 40px;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 50px;
        }

        /* Stats Cards (Inside Hero / Page start) */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 30px;
        }

        .stat-card {
            background-color: var(--white);
            padding: 25px 20px;
            border-radius: 12px;
            box-shadow: var(--shadow);
            border: 1px solid var(--gray-100);
            transition: var(--transition);
        }

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

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

        .stat-label {
            font-size: 0.9rem;
            color: var(--gray-600);
            font-weight: 500;
        }

        /* About Section */
        .about-section {
            background-color: var(--white);
        }

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

        .about-content h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            position: relative;
        }

        .about-text {
            color: var(--gray-600);
            margin-bottom: 25px;
            font-size: 1.05rem;
        }

        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

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

        .about-feat-item span {
            width: 8px;
            height: 8px;
            background-color: var(--secondary);
            border-radius: 50%;
        }

        /* Services的能力卡片 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            background-color: var(--white);
            border-radius: 16px;
            padding: 35px 30px;
            box-shadow: var(--shadow);
            border: 1px solid var(--gray-100);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: var(--transition);
        }

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

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

        .service-icon {
            width: 60px;
            height: 60px;
            background-color: rgba(0, 102, 255, 0.05);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 25px;
            color: var(--primary);
            font-size: 1.8rem;
            font-weight: 700;
        }

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

        .service-card p {
            color: var(--gray-600);
            font-size: 0.95rem;
        }

        /* One stop Section */
        .onestop-section {
            background-color: var(--white);
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-top: 30px;
        }

        .tag-item {
            padding: 8px 16px;
            background-color: var(--gray-100);
            color: var(--gray-700);
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: var(--transition);
        }

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

        /* Process Steps */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            position: relative;
        }

        .process-card {
            background-color: var(--white);
            padding: 30px 25px;
            border-radius: 12px;
            box-shadow: var(--shadow);
            border: 1px solid var(--gray-100);
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .process-num {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 20px;
        }

        .process-card h4 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }

        .process-card p {
            font-size: 0.9rem;
            color: var(--gray-600);
        }

        /* Network Section */
        .network-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .network-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .network-item {
            padding: 15px;
            background-color: var(--white);
            border-radius: 8px;
            border-left: 4px solid var(--primary);
            box-shadow: var(--shadow);
        }

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

        .case-card {
            background-color: var(--white);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--gray-100);
            transition: var(--transition);
        }

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

        .case-img-wrapper {
            position: relative;
            overflow: hidden;
            background-color: var(--gray-100);
        }

        .case-img-wrapper img {
            width: 100%;
            display: block;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .case-info {
            padding: 25px;
        }

        .case-tag {
            display: inline-block;
            padding: 4px 10px;
            background-color: rgba(0, 230, 118, 0.1);
            color: #00b358;
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 4px;
            margin-bottom: 10px;
        }

        .case-info h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
        }

        .case-info p {
            font-size: 0.9rem;
            color: var(--gray-600);
        }

        /* Comparison Table & Pricing */
        .pricing-section {
            background-color: var(--white);
        }

        .comparison-wrapper {
            overflow-x: auto;
            margin-bottom: 50px;
            box-shadow: var(--shadow);
            border-radius: 12px;
            border: 1px solid var(--gray-200);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            background-color: var(--white);
            min-width: 800px;
        }

        .comparison-table th, .comparison-table td {
            padding: 18px 24px;
            border-bottom: 1px solid var(--gray-200);
        }

        .comparison-table th {
            background-color: var(--gray-100);
            font-weight: 700;
            color: var(--dark);
        }

        .comparison-table tr:hover {
            background-color: rgba(0, 102, 255, 0.02);
        }

        .badge-star {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            color: var(--accent);
            font-weight: 700;
        }

        .score-highlight {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--primary);
        }

        /* Token 比价 */
        .token-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .token-card {
            background-color: var(--light-bg);
            border-radius: 10px;
            padding: 20px;
            border: 1px solid var(--gray-200);
        }

        .token-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 1px dashed var(--gray-200);
        }

        .token-name {
            font-weight: 700;
            color: var(--dark);
        }

        .token-price {
            color: var(--secondary);
            font-weight: 700;
        }

        .token-detail {
            font-size: 0.85rem;
            color: var(--gray-600);
            display: flex;
            justify-content: space-between;
            margin-bottom: 8px;
        }

        /* Training section */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .training-card {
            background-color: var(--white);
            border-radius: 12px;
            padding: 30px;
            box-shadow: var(--shadow);
            border: 1px solid var(--gray-100);
            transition: var(--transition);
        }

        .training-card:hover {
            transform: translateY(-5px);
        }

        .training-card h4 {
            font-size: 1.2rem;
            color: var(--primary);
            margin-bottom: 15px;
        }

        .training-card ul {
            font-size: 0.9rem;
            color: var(--gray-600);
        }

        .training-card ul li {
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .training-card ul li::before {
            content: "✓";
            color: var(--secondary);
            font-weight: bold;
        }

        /* Article / Knowledge base */
        .articles-section {
            background-color: var(--white);
        }

        .article-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 25px;
        }

        .article-item {
            background-color: var(--light-bg);
            padding: 25px;
            border-radius: 10px;
            border-left: 5px solid var(--primary);
            transition: var(--transition);
        }

        .article-item:hover {
            transform: translateX(5px);
            background-color: var(--white);
            box-shadow: var(--shadow);
        }

        .article-item h4 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }

        .article-item h4 a {
            color: var(--dark);
        }

        .article-item h4 a:hover {
            color: var(--primary);
        }

        .article-desc {
            font-size: 0.9rem;
            color: var(--gray-600);
            margin-bottom: 15px;
        }

        .article-meta {
            display: flex;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--gray-600);
        }

        .article-meta a {
            color: var(--primary);
            font-weight: 600;
        }

        /* FAQ Accordion */
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: var(--white);
            margin-bottom: 15px;
            border-radius: 8px;
            box-shadow: var(--shadow);
            border: 1px solid var(--gray-100);
            overflow: hidden;
        }

        .faq-question {
            padding: 20px;
            font-weight: 600;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition);
        }

        .faq-question:hover {
            background-color: rgba(0, 102, 255, 0.02);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: var(--light-bg);
        }

        .faq-answer p {
            padding: 20px;
            font-size: 0.95rem;
            color: var(--gray-600);
            border-top: 1px solid var(--gray-100);
        }

        .faq-icon {
            transition: transform 0.3s;
            font-weight: bold;
        }

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

        .faq-item.active .faq-answer {
            max-height: 200px;
        }

        /* Comments / Testimonials */
        .comments-section {
            background-color: var(--white);
        }

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

        .comment-card {
            background-color: var(--light-bg);
            padding: 25px;
            border-radius: 12px;
            border: 1px solid var(--gray-200);
            box-shadow: var(--shadow);
            position: relative;
        }

        .comment-text {
            font-size: 0.95rem;
            color: var(--gray-600);
            margin-bottom: 20px;
            font-style: italic;
        }

        .comment-author {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--gray-200);
            padding-top: 15px;
        }

        .author-info h4 {
            font-size: 0.95rem;
            margin-bottom: 2px;
        }

        .author-info p {
            font-size: 0.8rem;
            color: var(--primary);
        }

        /* Contact & Form */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
        }

        .contact-info-panel {
            background-color: var(--white);
            padding: 40px;
            border-radius: 16px;
            box-shadow: var(--shadow);
        }

        .info-item {
            display: flex;
            align-items: flex-start;
            gap: 15px;
            margin-bottom: 25px;
        }

        .info-icon {
            width: 40px;
            height: 40px;
            background-color: rgba(0, 102, 255, 0.1);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            flex-shrink: 0;
        }

        .info-text h4 {
            font-size: 1.05rem;
            margin-bottom: 5px;
        }

        .info-text p, .info-text a {
            color: var(--gray-600);
            font-size: 0.95rem;
        }

        .qr-box {
            margin-top: 30px;
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 20px;
            background-color: var(--light-bg);
            border-radius: 8px;
        }

        .qr-box img {
            width: 100px;
            height: 100px;
            border-radius: 4px;
        }

        .qr-desc {
            font-size: 0.9rem;
            color: var(--gray-700);
        }

        .contact-form-panel {
            background-color: var(--white);
            padding: 40px;
            border-radius: 16px;
            box-shadow: var(--shadow);
        }

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

        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark);
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1.5px solid var(--gray-200);
            border-radius: 8px;
            font-size: 0.95rem;
            transition: var(--transition);
            background-color: var(--white);
            color: var(--dark);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
        }

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

        .form-submit-btn {
            width: 100%;
            padding: 14px;
            font-size: 1rem;
        }

        /* Footer */
        .footer {
            background-color: var(--dark);
            color: #94a3b8;
            padding: 60px 0 30px;
        }

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

        .footer-logo {
            margin-bottom: 20px;
        }

        .footer-desc {
            font-size: 0.9rem;
            line-height: 1.8;
            margin-bottom: 15px;
        }

        .footer-title {
            color: var(--white);
            font-size: 1.1rem;
            margin-bottom: 20px;
            font-weight: 700;
            position: relative;
        }

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

        .footer-links a {
            font-size: 0.9rem;
            color: #94a3b8;
        }

        .footer-links a:hover {
            color: var(--white);
            padding-left: 5px;
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 10px;
        }

        .friend-links a {
            display: inline-block;
            font-size: 0.85rem;
            background-color: rgba(255, 255, 255, 0.05);
            padding: 5px 10px;
            border-radius: 4px;
            color: #cbd5e1;
        }

        .friend-links a:hover {
            background-color: var(--primary);
            color: var(--white);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 25px;
            text-align: center;
            font-size: 0.85rem;
        }

        /* Float KF */
        .float-kf {
            position: fixed;
            right: 20px;
            bottom: 40px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-item {
            width: 50px;
            height: 50px;
            background-color: var(--white);
            border-radius: 50%;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            color: var(--primary);
            font-weight: bold;
            font-size: 0.9rem;
            position: relative;
        }

        .float-item:hover {
            background-color: var(--primary);
            color: var(--white);
            transform: scale(1.1);
        }

        .float-qr-hover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background-color: var(--white);
            padding: 15px;
            border-radius: 8px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--gray-200);
            display: none;
            text-align: center;
            width: 140px;
        }

        .float-qr-hover img {
            width: 110px;
            height: 110px;
            margin-bottom: 5px;
        }

        .float-qr-hover span {
            font-size: 0.75rem;
            color: var(--gray-700);
            display: block;
        }

        .float-item-qr:hover .float-qr-hover {
            display: block;
        }

        /* Responsive Design */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .services-grid, .cases-grid, .comments-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .token-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--white);
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 4px 10px rgba(0,0,0,0.05);
                border-top: 1px solid var(--gray-100);
            }

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

            .menu-toggle {
                display: flex;
            }

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

            .hero-desc {
                font-size: 1.05rem;
            }

            .about-grid, .network-grid, .contact-grid {
                grid-template-columns: 1fr;
                gap: 35px;
            }

            .about-features {
                grid-template-columns: 1fr;
            }

            .services-grid, .cases-grid, .comments-grid, .training-grid, .article-list {
                grid-template-columns: 1fr;
            }

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

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

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

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

            .section-title {
                font-size: 1.8rem;
            }
        }