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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            color: #333;
            background: #f5f7fa;
        }

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

        header {
            background: #fff;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
        }

        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .logo {
            font-size: 28px;
            font-weight: bold;
            color: #ff6b35;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .logo img {
            height: 36px;
            width: auto;
        }

        .nav-links {
            display: flex;
            gap: 30px;
            list-style: none;
        }

        .nav-links a {
            text-decoration: none;
            color: #333;
            font-weight: 500;
            transition: color 0.3s;
        }

        .nav-links a:hover {
            color: #ff6b35;
        }

        .hero {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: #fff;
            padding: 150px 20px 100px;
            text-align: center;
            min-height: 600px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
        }

        .hero h1 {
            font-size: 48px;
            margin-bottom: 20px;
            font-weight: 700;
        }

        .hero p {
            font-size: 20px;
            margin-bottom: 40px;
            max-width: 700px;
            line-height: 1.8;
        }

        .user-count {
            background: rgba(255, 255, 255, 0.2);
            padding: 20px 40px;
            border-radius: 50px;
            margin-bottom: 30px;
            backdrop-filter: blur(10px);
        }

        .user-count span {
            font-size: 36px;
            font-weight: bold;
            color: #ffd700;
        }

        .cta-button {
            background: #ff6b35;
            color: #fff;
            padding: 18px 50px;
            border: none;
            border-radius: 50px;
            font-size: 18px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            text-decoration: none;
            display: inline-block;
            box-shadow: 0 4px 15px rgba(255, 107, 53, 0.4);
        }

        .cta-button:hover {
            background: #ff8c5a;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 107, 53, 0.6);
        }

        .qr-code {
            margin-top: 40px;
            text-align: center;
        }

        .qr-code img {
            width: 200px;
            height: 200px;
            border-radius: 10px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
            background: #fff;
            padding: 10px;
        }

        .qr-code p {
            margin-top: 15px;
            color: #fff;
            font-size: 16px;
            font-weight: 500;
        }

        .partners {
            padding: 60px 0;
            background: #fff;
            text-align: center;
        }
        
        .app-showcase {
            padding: 80px 0;
            background: #fff;
        }
        
        .app-showcase h2 {
            text-align: center;
            font-size: 36px;
            margin-bottom: 20px;
            color: #333;
        }
        
        .app-showcase .subtitle {
            text-align: center;
            font-size: 18px;
            color: #666;
            margin-bottom: 60px;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .showcase-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 40px;
        }
        
        .showcase-item {
            text-align: center;
            padding: 20px;
            background: #f8f9fa;
            border-radius: 20px;
            transition: all 0.3s;
        }
        
        .showcase-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        }
        
        .showcase-item img {
            width: 100%;
            max-width: 280px;
            height: auto;
            border-radius: 15px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
            margin-bottom: 20px;
        }
        
        .showcase-item p {
            font-size: 18px;
            font-weight: 600;
            color: #333;
        }
        
        .partners h2 {
            font-size: 28px;
            margin-bottom: 40px;
            color: #333;
        }

        .partners-grid {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
        }

        .partner-item {
            padding: 15px 30px;
            background: #f8f9fa;
            border-radius: 10px;
            font-weight: 600;
            color: #666;
            transition: all 0.3s;
        }

        .partner-item:hover {
            background: #ff6b35;
            color: #fff;
            transform: translateY(-3px);
        }

        .features {
            padding: 80px 0;
            background: #f5f7fa;
        }

        .features h2 {
            text-align: center;
            font-size: 36px;
            margin-bottom: 20px;
            color: #333;
        }

        .features p.subtitle {
            text-align: center;
            font-size: 18px;
            color: #666;
            margin-bottom: 60px;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 30px;
        }

        .feature-card {
            background: #fff;
            padding: 40px;
            border-radius: 20px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            transition: all 0.3s;
        }

        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
        }

        .feature-icon {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 25px;
            font-size: 32px;
        }

        .feature-card h3 {
            font-size: 24px;
            margin-bottom: 15px;
            color: #333;
        }

        .feature-card p {
            color: #666;
            line-height: 1.8;
        }

        .how-to-use {
            padding: 80px 0;
            background: #fff;
        }

        .how-to-use h2 {
            text-align: center;
            font-size: 36px;
            margin-bottom: 20px;
            color: #333;
        }

        .how-to-use p.subtitle {
            text-align: center;
            font-size: 18px;
            color: #666;
            margin-bottom: 60px;
        }

        .steps-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }

        .step-card {
            text-align: center;
            padding: 30px;
        }

        .step-number {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            font-weight: bold;
            margin: 0 auto 25px;
        }

        .step-card h3 {
            font-size: 22px;
            margin-bottom: 15px;
            color: #333;
        }

        .step-card p {
            color: #666;
            line-height: 1.8;
        }

        .task-types {
            padding: 80px 0;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: #fff;
        }

        .task-types h2 {
            text-align: center;
            font-size: 36px;
            margin-bottom: 60px;
        }

        .task-types-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }

        .task-card {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            padding: 40px 30px;
            border-radius: 20px;
            text-align: center;
            transition: all 0.3s;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .task-card:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-5px);
        }

        .task-icon {
            font-size: 48px;
            margin-bottom: 20px;
        }

        .task-card h3 {
            font-size: 22px;
            margin-bottom: 15px;
        }

        .task-card p {
            opacity: 0.9;
            line-height: 1.8;
        }

        .faq {
            padding: 80px 0;
            background: #f5f7fa;
        }

        .faq h2 {
            text-align: center;
            font-size: 36px;
            margin-bottom: 60px;
            color: #333;
        }

        .faq-item {
            background: #fff;
            margin-bottom: 20px;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
        }

        .faq-question {
            padding: 25px 30px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 18px;
            color: #333;
        }

        .faq-answer {
            padding: 0 30px 25px;
            color: #666;
            line-height: 1.8;
            display: none;
        }

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

        .faq-item.active .faq-question {
            background: #f8f9fa;
        }

        footer {
            background: #1a1a2e;
            color: #fff;
            padding: 60px 0 30px;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-section h3 {
            font-size: 20px;
            margin-bottom: 20px;
            color: #ff6b35;
        }

        .footer-section p {
            color: #aaa;
            line-height: 1.8;
            margin-bottom: 15px;
        }

        .footer-section a {
            color: #aaa;
            text-decoration: none;
            transition: color 0.3s;
        }

        .footer-section a:hover {
            color: #ff6b35;
        }

        .footer-bottom {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #888;
        }

        @media (max-width: 768px) {
            .hero h1 {
                font-size: 32px;
            }

            .hero p {
                font-size: 16px;
            }

            .user-count span {
                font-size: 28px;
            }

            .nav-links {
                display: none;
            }

            .features-grid,
            .steps-container,
            .task-types-grid {
                grid-template-columns: 1fr;
            }

            .feature-card,
            .step-card,
            .task-card {
                padding: 30px 20px;
            }
        }