:root {
            --primary: #6e48aa;
            --secondary: #9d50bb;
            --dark: #1a1a2e;
            --light: #f8f9fa;
            --accent: #00b4d8;
            --danger: #e63946;
            --success: #2ecc71;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, var(--dark), #16213e);
            color: var(--light);
            min-height: 100vh;
            overflow-x: hidden;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem;
        }
        
        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            margin-bottom: 3rem;
        }
        
        .logo {
            font-size: 2rem;
            font-weight: 700;
            background: linear-gradient(to right, var(--primary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        
        .nav-links {
            display: flex;
            gap: 2rem;
        }
        
        .nav-links a {
            color: var(--light);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            position: relative;
        }
        
        .nav-links a:hover {
            color: var(--accent);
        }
        
        .nav-links a::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: -5px;
            left: 0;
            background-color: var(--accent);
            transition: width 0.3s ease;
        }
        
        .nav-links a:hover::after {
            width: 100%;
        }
        
        .hero {
            text-align: center;
            margin: 5rem 0;
        }
        
        .hero h1 {
            font-size: 4rem;
            margin-bottom: 1rem;
            background: linear-gradient(to right, var(--primary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        
        .hero p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 2rem;
            line-height: 1.6;
            color: rgba(255, 255, 255, 0.7);
        }
        
        .ai-cards {
            display: flex;
            justify-content: center;
            gap: 3rem;
            flex-wrap: wrap;
            margin-top: 4rem;
        }
        
        .ai-card {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 15px;
            padding: 2rem;
            width: 350px;
            transition: all 0.3s ease;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            position: relative;
            overflow: hidden;
        }
        
        .ai-card::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(110, 72, 170, 0.1) 0%, transparent 70%);
            transform: rotate(30deg);
            z-index: -1;
        }
        
        .ai-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
            border-color: rgba(157, 80, 187, 0.3);
        }
        
        .ai-card h2 {
            font-size: 1.8rem;
            margin-bottom: 1rem;
            color: var(--light);
        }
        
        .ai-card.vortex h2 {
            color: var(--accent);
        }
        
        .ai-card.fukushima h2 {
            color: var(--secondary);
        }
        
        .ai-card p {
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 2rem;
            line-height: 1.6;
        }
        
        .features {
            margin-bottom: 2rem;
        }
        
        .feature {
            display: flex;
            align-items: center;
            margin-bottom: 0.8rem;
            color: rgba(255, 255, 255, 0.7);
        }
        
        .feature i {
            margin-right: 0.5rem;
            color: var(--accent);
        }
        
        .btn {
            display: inline-block;
            padding: 0.8rem 1.8rem;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            font-size: 1rem;
        }
        
        .btn-primary {
            background: linear-gradient(to right, var(--primary), var(--secondary));
            color: white;
        }
        
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(110, 72, 170, 0.3);
        }
        
        .btn-secondary {
            background: rgba(255, 255, 255, 0.1);
            color: white;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.2);
        }
        
        /* Modal Styles */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.8);
            backdrop-filter: blur(5px);
            z-index: 1000;
            justify-content: center;
            align-items: center;
        }
        
        .modal-content {
            background: linear-gradient(145deg, #1a1a2e, #16213e);
            padding: 2rem;
            border-radius: 15px;
            width: 400px;
            max-width: 90%;
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.5);
            border: 1px solid rgba(157, 80, 187, 0.3);
            position: relative;
        }
        
        .close-modal {
            position: absolute;
            top: 1rem;
            right: 1rem;
            font-size: 1.5rem;
            color: rgba(255, 255, 255, 0.5);
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .close-modal:hover {
            color: var(--danger);
        }
        
        .modal-content h2 {
            margin-bottom: 1.5rem;
            color: var(--secondary);
        }
        
        .form-group {
            margin-bottom: 1.5rem;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            color: rgba(255, 255, 255, 0.7);
        }
        
        .form-group input {
            width: 100%;
            padding: 0.8rem;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.05);
            color: white;
            font-size: 1rem;
        }
        
        .form-group input:focus {
            outline: none;
            border-color: var(--secondary);
        }
        
        /* Payment Modal Specific */
        .payment-plans {
            display: flex;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        
        .plan {
            flex: 1;
            padding: 1rem;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .plan:hover {
            border-color: var(--secondary);
        }
        
        .plan.selected {
            border-color: var(--success);
            background: rgba(46, 204, 113, 0.1);
        }
        
        .plan h3 {
            color: var(--light);
            margin-bottom: 0.5rem;
        }
        
        .plan .price {
            font-size: 1.2rem;
            font-weight: bold;
            color: var(--success);
        }
        
        .plan .duration {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.5);
        }
        
        /* Status Messages */
        .status-message {
            padding: 1rem;
            border-radius: 8px;
            margin-bottom: 1rem;
            display: none;
        }
        
        .error {
            background: rgba(230, 57, 70, 0.2);
            border: 1px solid var(--danger);
            color: var(--danger);
            display: block;
        }
        
        .success {
            background: rgba(46, 204, 113, 0.2);
            border: 1px solid var(--success);
            color: var(--success);
            display: block;
        }
        
        .info {
            background: rgba(0, 180, 216, 0.2);
            border: 1px solid var(--accent);
            color: var(--accent);
            display: block;
        }
        
        footer {
            text-align: center;
            margin-top: 5rem;
            padding: 2rem 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.5);
        }
        
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            
            .ai-cards {
                flex-direction: column;
                align-items: center;
            }
            
            .nav-links {
                display: none;
            }
            
            .payment-plans {
                flex-direction: column;
            }
        }
        
        @keyframes float {
            0%, 100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-10px);
            }
        }
        
        .floating {
            animation: float 4s ease-in-out infinite;
        }
        
        .spinner {
            display: none;
            width: 40px;
            height: 40px;
            margin: 0 auto;
            border: 4px solid rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            border-top: 4px solid var(--accent);
            animation: spin 1s linear infinite;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
          }