:root {
            --bg-main: #060713;
            --bg-card: #0d0f28;
            --bg-input: #13173a;
            --primary: #00f2fe;
            --secondary: #7f00ff;
            --accent: #ff007f;
            --text-main: #ffffff;
            --text-muted: #a0a5c4;
            --border: rgba(0, 242, 254, 0.15);
            --border-hover: rgba(255, 0, 127, 0.4);
            --neon-glow: 0 0 15px rgba(0, 242, 254, 0.3);
            --transition: all 0.3s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-main);
            color: var(--text-main);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        /* Typography */
        h1, h2, h3, h4 {
            font-weight: 700;
            letter-spacing: 1px;
        }

        .gradient-text {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        /* Buttons & Badges */
        .btn-neon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 600;
            text-decoration: none;
            color: #fff;
            background: linear-gradient(95deg, var(--primary), var(--secondary));
            border: none;
            box-shadow: 0 4px 15px rgba(0, 242, 254, 0.4);
            transition: var(--transition);
            cursor: pointer;
            text-shadow: 0 1px 3px rgba(0,0,0,0.3);
        }

        .btn-neon:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 242, 254, 0.6), 0 0 10px rgba(255, 0, 127, 0.4);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 600;
            text-decoration: none;
            color: #fff;
            background: transparent;
            border: 2px solid var(--primary);
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-secondary:hover {
            background: rgba(0, 242, 254, 0.1);
            box-shadow: var(--neon-glow);
        }

        /* Header Navigation */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(6, 7, 19, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
        }

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

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

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

        nav {
            display: flex;
            align-items: center;
            gap: 20px;
        }

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

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

        .nav-links a:hover {
            color: var(--primary);
            text-shadow: 0 0 8px rgba(0, 242, 254, 0.6);
        }

        .ai-page-home-link {
            color: var(--primary) !important;
            font-weight: bold;
        }

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

        .menu-toggle span {
            width: 25px;
            height: 2px;
            background-color: #fff;
            transition: var(--transition);
        }

        /* Section Layouts */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border);
            position: relative;
        }

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

        .section-header h2 {
            font-size: 2.2rem;
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background: linear-gradient(to right, var(--primary), var(--accent));
            border-radius: 2px;
        }

        .section-header p {
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }

        /* Hero Section (No images allowed) */
        #hero {
            padding-top: 150px;
            padding-bottom: 100px;
            background: radial-gradient(circle at top right, rgba(127, 0, 255, 0.15), transparent 60%),
                        radial-gradient(circle at bottom left, rgba(0, 242, 254, 0.15), transparent 60%);
            text-align: center;
        }

        .hero-badge {
            background: rgba(0, 242, 254, 0.1);
            border: 1px solid var(--primary);
            padding: 6px 16px;
            border-radius: 20px;
            color: var(--primary);
            font-size: 0.85rem;
            display: inline-block;
            margin-bottom: 20px;
            box-shadow: 0 0 10px rgba(0, 242, 254, 0.2);
        }

        #hero h1 {
            font-size: 3rem;
            line-height: 1.2;
            margin-bottom: 25px;
        }

        .hero-desc {
            font-size: 1.2rem;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 40px auto;
        }

        .hero-ctas {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 60px;
            flex-wrap: wrap;
        }

        /* Stats Grid */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            margin-top: 40px;
        }

        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            padding: 30px;
            border-radius: 15px;
            transition: var(--transition);
        }

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

        .stat-num {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }

        /* About Section */
        #about .about-content {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 40px;
            align-items: center;
        }

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

        .about-intro-box {
            background: var(--bg-card);
            border-left: 4px solid var(--accent);
            padding: 20px;
            border-radius: 0 10px 10px 0;
            margin-bottom: 20px;
        }

        /* Service System */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 15px;
            padding: 30px;
            transition: var(--transition);
        }

        .service-card:hover {
            border-color: var(--accent);
            transform: translateY(-5px);
            box-shadow: 0 0 20px rgba(255, 0, 127, 0.2);
        }

        .service-card h3 {
            font-size: 1.4rem;
            margin-bottom: 15px;
            color: var(--primary);
        }

        .service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 15px;
        }

        .service-tags span {
            background: rgba(255,255,255,0.05);
            font-size: 0.75rem;
            padding: 4px 8px;
            border-radius: 4px;
            color: var(--text-muted);
        }

        /* Workflow Timeline */
        .workflow-timeline {
            display: flex;
            flex-direction: column;
            gap: 30px;
            max-width: 800px;
            margin: 0 auto;
        }

        .timeline-item {
            display: flex;
            gap: 30px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            padding: 25px;
            border-radius: 12px;
            position: relative;
        }

        .timeline-num {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            width: 45px;
            height: 45px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            flex-shrink: 0;
        }

        /* Solutions */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .solution-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 15px;
            padding: 30px;
            transition: var(--transition);
        }

        .solution-card:hover {
            border-color: var(--primary);
        }

        .solution-card h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: var(--primary);
        }

        /* Service Network & Technical Standards */
        .grid-two-col {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .info-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            padding: 30px;
            border-radius: 15px;
        }

        .info-card ul {
            list-style: none;
            margin-top: 20px;
        }

        .info-card li {
            position: relative;
            padding-left: 20px;
            margin-bottom: 12px;
        }

        .info-card li::before {
            content: '✦';
            position: absolute;
            left: 0;
            color: var(--primary);
        }

        /* Cases Center */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }

        .case-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 12px;
            overflow: hidden;
            transition: var(--transition);
        }

        .case-card:hover {
            transform: scale(1.02);
            border-color: var(--accent);
        }

        .case-img-container {
            width: 100%;
            height: 200px;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #000;
        }

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

        .case-details {
            padding: 20px;
        }

        /* Comparison Section */
        .comparison-table-wrapper {
            width: 100%;
            overflow-x: auto;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 12px;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 700px;
        }

        .comparison-table th,
        .comparison-table td {
            padding: 16px 20px;
            text-align: left;
            border-bottom: 1px solid var(--border);
        }

        .comparison-table th {
            background: rgba(0, 242, 254, 0.05);
            font-weight: 700;
        }

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

        .rating-box {
            text-align: center;
            padding: 30px;
            background: rgba(127, 0, 255, 0.1);
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-top: 30px;
            display: flex;
            align-items: center;
            justify-content: space-around;
            flex-wrap: wrap;
            gap: 20px;
        }

        .rating-stars {
            color: #ffd700;
            font-size: 2rem;
            text-shadow: 0 0 10px rgba(255,215,0,0.5);
        }

        .rating-score {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary);
        }

        /* Token Pricing & Matcher */
        .token-pricing-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }

        .token-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            padding: 25px;
            border-radius: 12px;
            text-align: center;
            position: relative;
        }

        .token-card.best-value::after {
            content: '推荐';
            position: absolute;
            top: 10px;
            right: 10px;
            background: var(--accent);
            color: #fff;
            font-size: 0.75rem;
            padding: 2px 8px;
            border-radius: 4px;
        }

        .token-price {
            font-size: 2rem;
            font-weight: bold;
            color: var(--accent);
            margin: 15px 0;
        }

        /* Matcher UI */
        .matcher-ui {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 15px;
            padding: 30px;
            max-width: 700px;
            margin: 0 auto;
        }

        .matcher-step {
            margin-bottom: 25px;
        }

        .matcher-step label {
            display: block;
            margin-bottom: 10px;
            font-weight: bold;
        }

        .matcher-options {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
            gap: 10px;
        }

        .matcher-btn {
            background: var(--bg-input);
            border: 1px solid var(--border);
            color: #fff;
            padding: 10px;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition);
        }

        .matcher-btn.active,
        .matcher-btn:hover {
            border-color: var(--primary);
            background: rgba(0, 242, 254, 0.1);
        }

        /* Trainings */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .training-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            padding: 25px;
            border-radius: 15px;
            transition: var(--transition);
        }

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

        .training-badge {
            background: rgba(127, 0, 255, 0.2);
            color: var(--primary);
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 0.8rem;
            display: inline-block;
            margin-bottom: 15px;
        }

        /* Help Center / FAQ / Troubleshooting / Glossary */
        .faq-accordion {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            margin-bottom: 15px;
            border-radius: 8px;
            overflow: hidden;
        }

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

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

        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            color: var(--text-muted);
        }

        .faq-item.active .faq-answer {
            padding: 20px;
            max-height: 200px;
            border-top: 1px solid var(--border);
        }

        /* Articles & News */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .article-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            padding: 25px;
            border-radius: 12px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .article-card h4 {
            margin-bottom: 15px;
            font-size: 1.1rem;
        }

        .article-card a {
            color: var(--primary);
            text-decoration: none;
            font-size: 0.9rem;
            margin-top: 15px;
            display: inline-block;
        }

        .article-card a:hover {
            text-decoration: underline;
        }

        /* User Reviews (6 items) */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 25px;
        }

        .review-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            padding: 30px;
            border-radius: 15px;
            position: relative;
        }

        .review-card::before {
            content: '“';
            position: absolute;
            top: 20px;
            left: 20px;
            font-size: 4rem;
            color: rgba(255,255,255,0.05);
            line-height: 1;
        }

        .reviewer-info {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-top: 20px;
            border-top: 1px solid var(--border);
            padding-top: 15px;
        }

        .reviewer-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }

        /* Contact & Submit Form */
        .contact-layout {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 50px;
        }

        .form-box {
            background: var(--bg-card);
            border: 1px solid var(--border);
            padding: 40px;
            border-radius: 15px;
        }

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

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

        .form-control {
            width: 100%;
            background: var(--bg-input);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 12px;
            color: #fff;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: var(--neon-glow);
        }

        .contact-info-panel {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }

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

        .info-icon {
            background: rgba(0, 242, 254, 0.1);
            color: var(--primary);
            width: 40px;
            height: 40px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

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

        .qr-box {
            background: #fff;
            padding: 10px;
            border-radius: 8px;
            text-align: center;
            max-width: 150px;
        }

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

        .qr-box span {
            color: #333;
            font-size: 0.75rem;
            display: block;
            margin-top: 5px;
        }

        /* Floating Widgets */
        .floating-kefu {
            position: fixed;
            bottom: 40px;
            right: 40px;
            z-index: 999;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 20px rgba(0,0,0,0.5);
            cursor: pointer;
            transition: var(--transition);
        }

        .floating-kefu:hover {
            transform: scale(1.1) rotate(15deg);
        }

        .floating-qr-card {
            position: absolute;
            bottom: 80px;
            right: 0;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 15px;
            display: none;
            flex-direction: column;
            align-items: center;
            box-shadow: 0 10px 30px rgba(0,0,0,0.5);
        }

        .floating-kefu:hover .floating-qr-card {
            display: flex;
        }

        /* Footer */
        footer {
            background: #03040a;
            border-top: 1px solid var(--border);
            padding: 60px 0 30px 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-col h5 {
            color: var(--primary);
            font-size: 1.1rem;
            margin-bottom: 20px;
        }

        .footer-col ul {
            list-style: none;
        }

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

        .footer-col a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: var(--primary);
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 20px;
        }

        .friend-links a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.85rem;
            background: rgba(255,255,255,0.03);
            padding: 4px 10px;
            border-radius: 4px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

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

        .copyright {
            text-align: center;
            border-top: 1px solid var(--border);
            padding-top: 30px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Responsive Settings */
        @media (max-width: 992px) {
            .grid-two-col, .contact-layout {
                grid-template-columns: 1fr;
            }
            #about .about-content {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            #hero h1 {
                font-size: 2.2rem;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: var(--bg-main);
                border-bottom: 1px solid var(--border);
                padding: 20px;
                gap: 15px;
            }
            .nav-links.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
        }