:root {
            --bg-color: #0b0813;
            --card-bg: rgba(25, 20, 45, 0.7);
            --primary-color: #ff2a85;
            --secondary-color: #8a2be2;
            --text-color: #ffffff;
            --text-muted: #a5a1b8;
            --border-color: rgba(255, 42, 133, 0.2);
            --border-hover: rgba(255, 42, 133, 0.5);
            --glow-shadow: 0 0 15px rgba(255, 42, 133, 0.3);
            --glow-shadow-strong: 0 0 25px rgba(255, 42, 133, 0.6);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            background-color: var(--bg-color);
            color: var(--text-color);
            font-family: var(--font-sans);
            font-size: 16px;
        }

        body {
            background: radial-gradient(circle at 50% 0%, #1c0e35 0%, #0b0813 60%);
            overflow-x: hidden;
            line-height: 1.6;
        }

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

        section {
            padding: 80px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        /* Typography */
        h1, h2, h3, h4 {
            font-weight: 700;
            letter-spacing: 0.5px;
            color: var(--text-color);
        }

        .section-title {
            text-align: center;
            font-size: 2.2rem;
            margin-bottom: 15px;
            background: linear-gradient(135deg, #fff, #ff2a85);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-transform: uppercase;
        }

        .section-subtitle {
            text-align: center;
            font-size: 1rem;
            color: var(--text-muted);
            margin-bottom: 50px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        p {
            color: var(--text-muted);
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 30px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 30px;
            text-decoration: none;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: #fff;
            box-shadow: var(--glow-shadow);
        }

        .btn-primary:hover {
            box-shadow: var(--glow-shadow-strong);
            transform: translateY(-2px);
        }

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

        .btn-outline:hover {
            background: rgba(255, 42, 133, 0.1);
            box-shadow: var(--glow-shadow);
            transform: translateY(-2px);
        }

        /* Header Navigation */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(11, 8, 19, 0.85);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            height: 70px;
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

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

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

        .brand-name {
            font-size: 1.25rem;
            font-weight: 800;
            background: linear-gradient(135deg, #fff, var(--primary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

        .nav-link {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.3s;
            white-space: nowrap;
        }

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

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

        /* Hero Section (No Image) */
        .hero {
            padding-top: 150px;
            padding-bottom: 100px;
            text-align: center;
            position: relative;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 18px;
            background: rgba(255, 42, 133, 0.15);
            border: 1px solid var(--primary-color);
            border-radius: 20px;
            color: var(--primary-color);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 25px;
            letter-spacing: 1px;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(255, 42, 133, 0.4); }
            70% { box-shadow: 0 0 0 10px rgba(255, 42, 133, 0); }
            100% { box-shadow: 0 0 0 0 rgba(255, 42, 133, 0); }
        }

        .hero-title {
            font-size: 3rem;
            line-height: 1.2;
            margin-bottom: 25px;
            font-weight: 900;
            background: linear-gradient(135deg, #ffffff 30%, #ff2a85 70%, #8a2be2 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        /* Data Info Cards */
        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 60px;
        }

        .data-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            text-align: center;
            transition: all 0.3s;
        }

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

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

        .data-label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

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

        .service-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 15px;
            padding: 30px;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            opacity: 0;
            transition: opacity 0.3s;
        }

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

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

        .service-icon {
            font-size: 2.5rem;
            margin-bottom: 20px;
            color: var(--primary-color);
            display: inline-block;
        }

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

        .service-card p {
            font-size: 0.9rem;
            margin-bottom: 15px;
        }

        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 15px;
        }

        .tag {
            font-size: 0.75rem;
            padding: 3px 8px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 4px;
            color: var(--text-muted);
        }

        /* One-stop Platform Info */
        .platform-intro-box {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 40px;
            margin-top: 30px;
        }

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

        .intro-item {
            display: flex;
            gap: 15px;
        }

        .intro-item-icon {
            color: var(--primary-color);
            font-size: 1.5rem;
            flex-shrink: 0;
        }

        /* Steps Block */
        .steps-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            padding: 25px;
            border-radius: 12px;
            position: relative;
            z-index: 1;
        }

        .step-num {
            position: absolute;
            top: -20px;
            left: 20px;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            box-shadow: var(--glow-shadow);
        }

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

        .case-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.3s;
        }

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

        .case-img-wrap {
            width: 100%;
            position: relative;
            overflow: hidden;
        }

        .case-img-wrap img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            transition: transform 0.5s;
        }

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

        .case-info {
            padding: 20px;
        }

        .case-tag {
            color: var(--primary-color);
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 8px;
            display: block;
        }

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

        /* Compare Table */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border-radius: 12px;
            border: 1px solid var(--border-color);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            background: var(--card-bg);
            min-width: 600px;
        }

        .compare-table th, .compare-table td {
            padding: 18px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .compare-table th {
            background: rgba(255, 42, 133, 0.1);
            color: var(--text-color);
            font-weight: 600;
        }

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

        .highlight-col {
            color: var(--primary-color);
            font-weight: bold;
        }

        /* Token Pricing Table */
        .token-pricing-box {
            margin-top: 30px;
        }

        /* Training section */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .training-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 15px;
            padding: 30px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .training-list {
            margin: 20px 0;
            list-style: none;
        }

        .training-list li {
            margin-bottom: 12px;
            padding-left: 20px;
            position: relative;
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .training-list li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--primary-color);
            font-weight: bold;
        }

        /* User Reviews */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .review-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            position: relative;
        }

        .review-stars {
            color: #ffd700;
            margin-bottom: 15px;
        }

        .review-content {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            font-style: italic;
        }

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

        .review-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--secondary-color);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 0.9rem;
        }

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

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 15px;
            overflow: hidden;
            transition: all 0.3s;
        }

        .faq-question {
            padding: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
        }

        .faq-answer {
            padding: 0 20px 20px 20px;
            color: var(--text-muted);
            font-size: 0.9rem;
            display: none;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 15px;
        }

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

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }

        .faq-item.active .faq-answer {
            display: block;
        }

        /* Articles & Knowledge base */
        .article-section {
            background: rgba(11, 8, 19, 0.5);
        }

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

        .article-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            transition: all 0.3s;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .article-card:hover {
            border-color: var(--border-hover);
            transform: translateY(-3px);
        }

        .article-meta {
            font-size: 0.8rem;
            color: var(--primary-color);
            margin-bottom: 10px;
        }

        .article-title {
            font-size: 1.1rem;
            margin-bottom: 15px;
            color: var(--text-color);
            text-decoration: none;
            line-height: 1.4;
            display: inline-block;
        }

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

        .article-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .article-link {
            font-size: 0.85rem;
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        /* Contact & Form */
        .contact-box {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 40px;
        }

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

        .contact-methods {
            margin: 30px 0;
        }

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

        .contact-item-icon {
            width: 40px;
            height: 40px;
            background: rgba(255, 42, 133, 0.1);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-color);
            font-weight: bold;
        }

        .contact-qr-box {
            display: flex;
            gap: 20px;
            align-items: center;
            background: rgba(0, 0, 0, 0.2);
            padding: 15px;
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.05);
        }

        .contact-qr-box img {
            width: 90px;
            height: 90px;
            border-radius: 6px;
        }

        .contact-qr-info p {
            font-size: 0.85rem;
            line-height: 1.4;
        }

        /* Form styling */
        .contact-form {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .form-group label {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 600;
        }

        .form-control {
            background: rgba(0, 0, 0, 0.3);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 12px 15px;
            color: #fff;
            font-size: 0.95rem;
            outline: none;
            transition: all 0.3s;
        }

        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 10px rgba(255, 42, 133, 0.2);
        }

        textarea.form-control {
            resize: vertical;
            min-height: 100px;
        }

        /* Float Customer Service */
        .float-kefu {
            position: fixed;
            right: 25px;
            bottom: 25px;
            z-index: 999;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            width: 55px;
            height: 55px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: var(--glow-shadow-strong);
            transition: transform 0.3s;
        }

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

        .float-kefu svg {
            width: 25px;
            height: 25px;
            fill: #fff;
        }

        .float-kefu-pop {
            position: absolute;
            bottom: 70px;
            right: 0;
            width: 260px;
            background: var(--bg-color);
            border: 1px solid var(--primary-color);
            border-radius: 12px;
            padding: 20px;
            display: none;
            box-shadow: var(--glow-shadow-strong);
            text-align: center;
        }

        .float-kefu-pop img {
            width: 140px;
            height: 140px;
            margin: 10px 0;
            border-radius: 6px;
        }

        .float-kefu:hover .float-kefu-pop {
            display: block;
        }

        /* Footer */
        footer {
            background: #06040a;
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 50px;
        }

        .footer-logo-desc p {
            margin-top: 15px;
            font-size: 0.9rem;
            max-width: 320px;
        }

        .footer-title {
            font-size: 1.05rem;
            margin-bottom: 20px;
            position: relative;
        }

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

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.3s;
        }

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

        .footer-bottom {
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .footer-bottom-links {
            display: flex;
            gap: 20px;
        }

        .footer-bottom-links a {
            color: var(--text-muted);
            text-decoration: none;
        }

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

        /* Responsive Design */
        @media (max-width: 1024px) {
            .service-grid, .case-grid, .review-grid, .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .data-grid, .steps-container {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            html {
                font-size: 14px;
            }
            section {
                padding: 60px 0;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(11, 8, 19, 0.95);
                border-bottom: 1px solid var(--border-color);
                padding: 20px 0;
                gap: 15px;
                text-align: center;
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
            .contact-box {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .training-grid {
                grid-template-columns: 1fr;
            }
            .steps-container {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 480px) {
            .service-grid, .case-grid, .review-grid, .article-grid, .data-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }