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

        body {
            font-family: 'Arial', sans-serif;
            line-height: 1.6;
            color: #333;
            background: linear-gradient(135deg, #0f0f23 0%, #1a1a3e 50%, #2d2d5f 100%);
            overflow-x: hidden;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header */
        header {
            position: fixed;
            top: 0;
            width: 100%;
            background: rgba(15, 15, 35, 0.95);
            backdrop-filter: blur(10px);
            z-index: 1000;
            transition: all 0.3s ease;
        }

        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 2rem;
            font-weight: bold;
            cursor: pointer;
        }

        .logo-icon {
            filter: drop-shadow(0 0 10px rgba(50, 205, 50, 0.3));
            animation: treeGlow 3s ease-in-out infinite alternate;
        }

        .logo-text {
            background: linear-gradient(45deg, #00d4ff, #ff6b6b, #4ecdc4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            animation: glow 2s ease-in-out infinite alternate;
        }

        @keyframes treeGlow {
            from { filter: drop-shadow(0 0 5px rgba(50, 205, 50, 0.3)); }
            to { filter: drop-shadow(0 0 15px rgba(50, 205, 50, 0.6)); }
        }

        @keyframes glow {
            from { filter: drop-shadow(0 0 5px rgba(0, 212, 255, 0.3)); }
            to { filter: drop-shadow(0 0 20px rgba(0, 212, 255, 0.6)); }
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
            align-items: center;
        }

        .nav-links a {
            color: white;
            text-decoration: none;
            transition: color 0.3s ease;
            position: relative;
        }

        .nav-links a:hover {
            color: #00d4ff;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: #00d4ff;
            transition: width 0.3s ease;
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        .language-switcher {
            padding: 0.5rem;
            background: rgba(255, 255, 255, 0.2);
            border: none;
            border-radius: 5px;
            color: white;
            cursor: pointer;
            z-index: 1100;
            font-size: 1rem;
            appearance: none;
            background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 24 24" fill="white"><path d="M7 10l5 5 5-5z"/></svg>');
            background-repeat: no-repeat;
            background-position: right 0.5rem center;
            padding-right: 2rem;
        }

        .language-switcher:focus,
        .language-switcher option {
            background: #1a1a3e;
            color: white;
            border: 1px solid #00d4ff;
        }

        /* Hero Section */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
        }

        .hero-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .hero-text h1 {
            font-size: 3.5rem;
            margin-bottom: 1rem;
            background: linear-gradient(45deg, #ffffff, #00d4ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            animation: slideInLeft 1s ease-out;
        }

        .hero-text .subtitle {
            font-size: 1.5rem;
            color: #00d4ff;
            margin-bottom: 1rem;
            animation: slideInLeft 1s ease-out 0.2s both;
        }

        .hero-text .slogan {
            font-size: 1.2rem;
            color: #a0a0ff;
            margin-bottom: 2rem;
            animation: slideInLeft 1s ease-out 0.4s both;
        }

        .hero-text p {
            white-space: pre-line;
            font-size: 1.1rem;
            color: #ccc;
            margin-bottom: 2rem;
            animation: slideInLeft 1s ease-out 0.6s both;
        }

        .cta-button {
            display: inline-block;
            padding: 1rem 2rem;
            background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
            color: white;
            text-decoration: none;
            border-radius: 50px;
            font-weight: bold;
            transition: all 0.3s ease;
            animation: slideInLeft 1s ease-out 0.8s both;
            position: relative;
            overflow: hidden;
        }

        .cta-button::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.5s ease;
        }

        .cta-button:hover::before {
            left: 100%;
        }

        .cta-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
        }

        /* Hero Visual */
        .hero-visual {
            position: relative;
            animation: slideInRight 1s ease-out;
        }

        .chart-container {
            width: 100%;
            height: 400px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 20px;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        .chart-lines {
            position: absolute;
            width: 100%;
            height: 100%;
        }

        .chart-line {
            position: absolute;
            height: 2px;
            background: linear-gradient(90deg, #00d4ff, #ff6b6b);
            animation: chartMove 3s ease-in-out infinite;
        }

        .chart-line:nth-child(1) { top: 20%; width: 80%; left: 10%; animation-delay: 0s; }
        .chart-line:nth-child(2) { top: 40%; width: 60%; left: 20%; animation-delay: 0.5s; }
        .chart-line:nth-child(3) { top: 60%; width: 70%; left: 15%; animation-delay: 1s; }
        .chart-line:nth-child(4) { top: 80%; width: 50%; left: 25%; animation-delay: 1.5s; }


        @keyframes chartMove {
            0% { transform: scaleX(0); opacity: 0; }
            50% { transform: scaleX(1); opacity: 1; }
            100% { transform: scaleX(0); opacity: 0; }
        }

        .floating-numbers {
            position: absolute;
            color: #00d4ff;
            font-family: 'Courier New', monospace;
            font-weight: bold;
        }

        .floating-numbers span {
            position: absolute;
            animation: float 4s ease-in-out infinite;
        }

        .floating-numbers span:nth-child(1) { top: 10%; left: 10%; animation-delay: 0s; }
        .floating-numbers span:nth-child(2) { top: 30%; right: 10%; animation-delay: 1s; }
        .floating-numbers span:nth-child(3) { bottom: 30%; left: 20%; animation-delay: 2s; }
        .floating-numbers span:nth-child(4) { bottom: 10%; right: 20%; animation-delay: 3s; }

        @keyframes float {
            0%, 100% { transform: translateY(0px); opacity: 0.7; }
            50% { transform: translateY(-20px); opacity: 1; }
        }

        
        .video-container {
            position: relative;
            width: 100%;
            padding-bottom: 56.25%; /* 16:9 aspect ratio */
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
        }

        .video-container iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
        }

        /* Course Overview Section */
        .course-overview {
            padding: 5rem 0;
            background: rgba(0, 0, 0, 0.3);
        }

        .course-overview h2 {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 2rem;
            color: white;
        }

        .course-intro {
            text-align: center;
            margin-bottom: 4rem;
        }

        .course-intro p {
            font-size: 1.2rem;
            color: #ccc;
            margin-bottom: 2rem;
        }

        .price-tag {
            display: inline-block;
            background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
            padding: 1rem 2rem;
            border-radius: 50px;
            font-size: 2rem;
            font-weight: bold;
            color: white;
            margin-bottom: 3rem;
        }

        .price-tag .currency {
            font-size: 1.5rem;
            opacity: 0.8;
        }

        .dao-fa-shu-qi {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 4rem;
        }

        .philosophy-card {
            background: rgba(255, 255, 255, 0.1);
            padding: 2rem;
            border-radius: 15px;
            text-align: center;
            transition: all 0.3s ease;
            border: 2px solid transparent;
            backdrop-filter: blur(10px);
        }

        .philosophy-card.dao {
            border-color: #ff6b6b;
        }

        .philosophy-card.fa {
            border-color: #4ecdc4;
        }

        .philosophy-card.shu {
            border-color: #45b7d1;
        }

        .philosophy-card.qi {
            border-color: #f9ca24;
        }

        .philosophy-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 212, 255, 0.2);
        }

        .philosophy-icon {
            font-size: 3rem;
            font-weight: bold;
            margin-bottom: 1rem;
            background: linear-gradient(45deg, #00d4ff, #ff6b6b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .philosophy-card h3 {
            color: white;
            margin-bottom: 1rem;
            font-size: 1.3rem;
        }

        .philosophy-card p {
            color: #ccc;
            font-size: 0.95rem;
        }

        .course-modules {
            display: grid;
            gap: 1.5rem;
        }

        .module-card {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.1);
            padding: 2rem;
            border-radius: 15px;
            transition: all 0.3s ease;
            border-left: 4px solid #00d4ff;
            backdrop-filter: blur(10px);
        }

        .module-card:hover {
            transform: translateX(10px);
            box-shadow: 0 10px 30px rgba(0, 212, 255, 0.2);
        }

        .module-number {
            font-size: 2rem;
            font-weight: bold;
            color: #00d4ff;
            margin-right: 2rem;
            min-width: 60px;
        }

        .module-content h4 {
            color: white;
            margin-bottom: 0.5rem;
            font-size: 1.2rem;
        }

        .module-content p {
            color: #ccc;
            font-size: 0.95rem;
        }

        .pricing-info {
            margin-bottom: 2rem;
        }

        .early-bird {
            display: inline-block;
            background: rgba(255, 107, 107, 0.1);
            padding: 1rem 2rem;
            border-radius: 15px;
            border: 2px solid #ff6b6b;
            backdrop-filter: blur(10px);
        }

        .early-bird .label {
            display: block;
            color: #ff6b6b;
            font-size: 0.9rem;
            margin-bottom: 0.5rem;
        }

        .early-bird .price {
            font-size: 2rem;
            font-weight: bold;
            color: #ff6b6b;
            margin-right: 1rem;
        }

        .early-bird .original {
            color: #888;
            text-decoration: line-through;
            font-size: 1.2rem;
        }

        .features {
            padding: 5rem 0;
            background: rgba(255, 255, 255, 0.05);
        }

        .features h2 {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 3rem;
            color: white;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }

        .feature-card {
            background: rgba(255, 255, 255, 0.1);
            padding: 2rem;
            border-radius: 15px;
            text-align: center;
            transition: all 0.3s ease;
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(10px);
        }

        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 212, 255, 0.2);
        }

        .feature-icon {
            font-size: 3rem;
            margin-bottom: 1rem;
            background: linear-gradient(45deg, #00d4ff, #ff6b6b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .feature-card h3 {
            color: white;
            margin-bottom: 1rem;
        }

        .feature-card p {
            color: #ccc;
        }

        /* Coming Soon Section */
        .coming-soon {
            padding: 5rem 0;
            text-align: center;
        }

        .coming-soon h2 {
            font-size: 2.5rem;
            margin-bottom: 2rem;
            color: white;
        }

        .coming-soon p {
            font-size: 1.2rem;
            color: #ccc;
            margin-bottom: 2rem;
        }

        .stripe-button {
            padding: 1rem 2rem;
            background: linear-gradient(45deg, #00d4ff, #4ecdc4);
            color: white;
            border: none;
            border-radius: 25px;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 1rem;
            font-weight: bold;
        }

        .stripe-button:hover {
            transform: scale(1.05);
        }

        /* Footer */
        footer {
            padding: 2rem 0;
            background: rgba(15, 15, 35, 0.9);
            text-align: center;
            color: #ccc;
        }

        /* Animations */
        @keyframes slideInLeft {
            from { transform: translateX(-50px); opacity: 0; }
            to { transform: translateX(0); opacity: 1; }
        }

        @keyframes slideInRight {
            from { transform: translateX(50px); opacity: 0; }
            to { transform: translateX(0); opacity: 1; }
        }

        /* Background Animation */
        .bg-animation {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            opacity: 0.1;
        }

        .bg-animation::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="2" fill="%2300d4ff"><animate attributeName="opacity" values="0;1;0" dur="2s" repeatCount="indefinite"/></circle></svg>') repeat;
            animation: bgMove 20s linear infinite;
        }

        @keyframes bgMove {
            0% { transform: translateY(0); }
            100% { transform: translateY(-100px); }
        }

        /* Responsive */
        @media (max-width: 768px) {
            .hero-content {
                grid-template-columns: 1fr;
                text-align: center;
            }
            
            .hero-text h1 {
                font-size: 2.5rem;
            }
            
            .nav-links {
                display: none;
            }
            
            .video-container {
                padding-bottom: 75%; /* Adjust for mobile */
            }
        }