* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            color: #333;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* Header */
        header {
            background: #fff;
            color: #5f6368;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 3px rgba(0,0,0,0.12);
            border-bottom: 1px solid #e8eaed;
        }
        
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 24px;
            font-weight: 700;
            color: #5f6368;
        }
        
        .logo img {
            width: 40px;
            height: 40px;
        }
        
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        
        nav a {
            color: #5f6368;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
        }
        
        nav a:hover {
            color: #1a73e8;
        }
        
        /* Hero Section */
        .hero {
            background: linear-gradient(135deg, #4285f4 0%, #34a853 100%);
            color: white;
            padding: 100px 0;
            text-align: center;
        }
        
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            font-weight: 800;
        }
        
        .hero p {
            font-size: 1.3rem;
            margin-bottom: 2rem;
            opacity: 0.95;
        }
        
        .cta-button {
            display: inline-block;
            background: white;
            color: #1a73e8;
            padding: 15px 40px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        
        .cta-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.2);
        }
        
        /* Sections */
        section {
            padding: 80px 0;
        }
        
        section:nth-child(even) {
            background: #f8f9fa;
        }
        
        h2 {
            font-size: 2.5rem;
            margin-bottom: 3rem;
            text-align: center;
            color: #2c3e50;
        }
        
        h3 {
            font-size: 1.8rem;
            margin-bottom: 1rem;
            color: #1a73e8;
        }
        
        h4 {
            font-size: 1.3rem;
            margin-bottom: 0.8rem;
            color: #555;
        }
        
        /* What is Section */
        .what-is-content {
            max-width: 900px;
            margin: 0 auto;
            text-align: center;
        }
        
        .what-is-content p {
            font-size: 1.15rem;
            line-height: 1.8;
            margin-bottom: 1.5rem;
        }
        
        .feature-image {
            width: 100%;
            max-width: 800px;
            margin: 30px auto;
            display: block;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        }
        
        /* Why Section */
        .why-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }
        
        .why-item {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        
        .why-item h3 {
            margin-bottom: 1rem;
        }
        
        /* Features Section */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
        }
        
        .feature-card {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transition: transform 0.3s;
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
        }
        
        .feature-icon {
            font-size: 3rem;
            margin-bottom: 1rem;
        }
        
        /* How to Section */
        .how-to-steps {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .step {
            display: flex;
            gap: 2rem;
            margin-bottom: 2.5rem;
            align-items: start;
        }
        
        .step-number {
            background: #1a73e8;
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        
        .step-content h3 {
            margin-top: 0;
        }
        
        /* Pricing Section */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
            max-width: 1000px;
            margin: 0 auto;
        }
        
        .pricing-card {
            background: white;
            padding: 2.5rem 2rem;
            border-radius: 15px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
            text-align: center;
            transition: transform 0.3s;
        }
        
        .pricing-card:hover {
            transform: translateY(-5px);
        }
        
        .pricing-card.featured {
            border: 3px solid #1a73e8;
            position: relative;
        }
        
        .pricing-card h3 {
            margin-bottom: 1.5rem;
        }
        
        .price {
            font-size: 2.5rem;
            font-weight: 700;
            color: #1a73e8;
            margin-bottom: 1rem;
        }
        
        .price-unit {
            font-size: 1rem;
            color: #666;
        }
        
        .pricing-features {
            list-style: none;
            margin: 2rem 0;
            text-align: left;
        }
        
        .pricing-features li {
            padding: 0.5rem 0;
            border-bottom: 1px solid #eee;
        }
        
        .pricing-features li:before {
            content: "✓ ";
            color: #34a853;
            font-weight: bold;
            margin-right: 8px;
        }
        
        /* FAQ Section */
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .faq-item {
            background: white;
            margin-bottom: 1.5rem;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 3px 10px rgba(0,0,0,0.08);
        }
        
        .faq-question {
            padding: 1.5rem;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .faq-question:hover {
            background: #f8f9fa;
        }
        
        .faq-answer {
            padding: 0 1.5rem 1.5rem;
            line-height: 1.8;
        }
        
        /* Footer */
        footer {
            background: #2c3e50;
            color: white;
            padding: 3rem 0 1.5rem;
            text-align: center;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        
        .footer-section h4 {
            color: white;
            margin-bottom: 1rem;
        }
        
        .footer-section ul {
            list-style: none;
        }
        
        .footer-section a {
            color: #bdc3c7;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-section a:hover {
            color: white;
        }
        
        .copyright {
            padding-top: 2rem;
            border-top: 1px solid #34495e;
            color: #bdc3c7;
        }
        .sj{ display: none;}
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            .sj{ display: block;}
            nav ul {
                display: none;
            }
            
            .features-grid, .pricing-grid {
                grid-template-columns: 1fr;
            }
        }