/* 重置样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 导航栏样式 */
        .navbar {
            background-color: #fff;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
        }
        
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        
        .logo {
            height: 40px;
            transition: transform 0.3s ease;
        }
        
        .logo:hover {
            transform: scale(1.05);
        }
        
        /* 电脑端导航菜单 */
        .nav-menu {
            display: flex;
            list-style: none;
            margin-left: 40px;
        }
        
        .nav-menu li {
            margin-right: 30px;
        }
        
        .nav-menu a {
            text-decoration: none;
            color: #555;
            font-weight: 500;
            font-size: 16px;
            transition: color 0.3s ease;
        }
        
        .nav-menu a:hover {
            color: #4F46E5;
        }
        
        /* 电脑端按钮 */
        .nav-buttons {
            display: flex;
            gap: 15px;
        }
        
        .btn {
            padding: 8px 20px;
            border-radius: 6px;
            font-weight: 500;
            text-decoration: none;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            display: inline-block;
            text-align: center;
            font-size: 16px;
        }
        
        .btn-primary {
            background-color: #4F46E5;
            color: white;
        }
        
        .btn-primary:hover {
            background-color: #4338CA;
        }
        
        /* 移动端菜单按钮 */
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: #4F46E5;
            cursor: pointer;
        }
        
        /* 移动端菜单 */
        .mobile-menu {
            display: none;
            position: absolute;
            top: 70px;
            left: 0;
            width: 100%;
            background-color: white;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            padding: 20px;
            z-index: 100;
        }
        
        .mobile-menu.active {
            display: block;
        }
        
        .mobile-menu-links {
            list-style: none;
            margin-bottom: 20px;
        }
        
        .mobile-menu-links li {
            margin-bottom: 15px;
        }
        
        .mobile-menu-links a {
            color: #4B5563;
            text-decoration: none;
            font-weight: 500;
            display: block;
            padding: 10px 15px;
            border-radius: 8px;
            transition: all 0.3s ease;
        }
        
        .mobile-menu-links a:hover {
            background-color: #F3F4F6;
            color: #4F46E5;
        }
        
        .mobile-menu-buttons {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        
        /* 主横幅 */
        .hero {
            padding: 120px 0 60px;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
        }
        
        .hero-content {
            display: flex;
            align-items: center;
            gap: 50px;
        }
        
        .hero-text {
            flex: 1;
        }
        
        .hero-title {
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: 20px;
            color: #1F2937;
        }
        
        .hero-subtitle {
            font-size: 1.1rem;
            color: #6B7280;
            margin-bottom: 30px;
        }
        
        .feature-list {
            margin-bottom: 30px;
        }
        
        .feature-item {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
            padding: 15px;
            border-radius: 10px;
            transition: background-color 0.3s ease;
        }
        
        .feature-item:hover {
            background-color: rgba(79, 70, 229, 0.05);
        }
        
        .feature-icon {
            color: #4F46E5;
            margin-right: 15px;
            font-size: 20px;
        }
        
        .payment-methods {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 30px;
        }
        
        .payment-method {
            padding: 10px 20px;
            border-radius: 10px;
            font-weight: 600;
            text-align: center;
            transition: transform 0.3s ease;
        }
        
        .payment-method:hover {
            transform: translateY(-5px);
        }
        
        .alipay {
            background-color: #E6F7FF;
            color: #1890FF;
        }
        
        .wechat {
            background-color: #E6FFFB;
            color: #13C2C2;
        }
        
        .qq {
            background-color: #FFF7E6;
            color: #FA8C16;
        }
        
        .usdt {
            background-color: #FFF1F0;
            color: #F5222D;
        }
        
        .hero-image {
            flex: 1;
            max-width: 400px;
        }
        
        .hero-card {
            background-color: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            overflow: hidden;
        }
        
        .hero-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        
        .hero-card-body {
            padding: 30px;
        }
        
        .hero-card-buttons {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        
        .btn-hero {
            padding: 15px;
            border-radius: 10px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            border: none;
            cursor: pointer;
            font-size: 16px;
        }
        
        .btn-register {
            background-color: #4F46E5;
            color: white;
        }
        
        .btn-register:hover {
            background-color: #4338CA;
            transform: translateY(-3px);
        }
        
        .btn-login {
            background-color: #4F46E5;
            color: white;
        }
        
        .btn-login:hover {
            background-color: #4338CA;
            transform: translateY(-3px);
        }
        
        /* 功能区域 */
        .features {
            padding: 80px 0;
            background-color: white;
        }
        
        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 15px;
            color: #1F2937;
        }
        
        .section-subtitle {
            font-size: 1rem;
            color: #6B7280;
            max-width: 700px;
            margin: 0 auto;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }
        
        .feature-card {
            background-color: #f9fafb;
            border-radius: 15px;
            padding: 30px;
            text-align: center;
            transition: all 0.3s ease;
            height: 100%;
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .feature-icon-wrapper {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            background-color: #EEF2FF;
            color: #4F46E5;
        }
        
        .feature-icon-wrapper i {
            font-size: 30px;
        }
        
        .feature-card-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: #1F2937;
        }
        
        .feature-card-text {
            color: #6B7280;
        }
        
        /* 支付接口区域 */
        .payment-interfaces {
            padding: 80px 0;
            background-color: #f9fafb;
        }
        
        .interfaces-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }
        
        .interface-card {
            background-color: white;
            border-radius: 15px;
            padding: 30px;
            text-align: center;
            transition: all 0.3s ease;
            height: 100%;
        }
        
        .interface-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .interface-icon-wrapper {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            background-color: #EEF2FF;
            color: #4F46E5;
        }
        
        .interface-icon-wrapper i {
            font-size: 24px;
        }
        
        .interface-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: #1F2937;
        }
        
        .interface-text {
            color: #6B7280;
        }
        
        /* 行业解决方案 */
        .solutions {
            padding: 80px 0;
            background-color: white;
        }
        
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }
        
        .solution-card {
            background-color: #f9fafb;
            border-radius: 15px;
            padding: 30px;
            text-align: center;
            transition: all 0.3s ease;
            height: 100%;
        }
        
        .solution-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .solution-icon-wrapper {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            background-color: #EEF2FF;
            color: #4F46E5;
        }
        
        .solution-icon-wrapper i {
            font-size: 30px;
        }
        
        .solution-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 15px;
            color: #1F2937;
        }
        
        .solution-list {
            list-style: none;
            text-align: left;
            padding: 0 15px;
        }
        
        .solution-list li {
            margin-bottom: 10px;
            color: #6B7280;
            font-size: 0.9rem;
            position: relative;
            padding-left: 15px;
        }
        
        .solution-list li::before {
            content: "•";
            position: absolute;
            left: 0;
            color: #4F46E5;
        }
        
        /* 使用步骤 */
        .steps {
            padding: 80px 0;
            background-color: #f9fafb;
        }
        
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-top: 50px;
        }
        
        .step-card {
            background-color: white;
            border-radius: 15px;
            padding: 30px;
            text-align: center;
            transition: all 0.3s ease;
            height: 100%;
        }
        
        .step-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .step-number {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background-color: #EEF2FF;
            color: #4F46E5;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 700;
            margin: 0 auto 20px;
        }
        
        .step-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: #1F2937;
        }
        
        .step-text {
            color: #6B7280;
        }
        
        /* 核心优势 */
        .core-advantages {
            padding: 80px 0;
            background-color: white;
        }
        
        .core-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }
        
        .core-card {
            background-color: #f9fafb;
            border-radius: 15px;
            padding: 30px;
            text-align: center;
            transition: all 0.3s ease;
            height: 100%;
        }
        
        .core-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .core-icon-wrapper {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            background-color: #EEF2FF;
            color: #4F46E5;
        }
        
        .core-icon-wrapper i {
            font-size: 24px;
        }
        
        .core-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: #1F2937;
        }
        
        .core-text {
            color: #6B7280;
        }
        
        /* 联系方式 */
        .contact {
            padding: 80px 0;
            background-color: #f9fafb;
        }
        
        .contact-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
        }
        
        .contact-card {
            background-color: white;
            border-radius: 15px;
            padding: 30px;
            text-align: center;
            transition: all 0.3s ease;
            height: 100%;
        }
        
        .contact-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .contact-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 15px;
            background-color: #EEF2FF;
            color: #4F46E5;
        }
        
        .contact-icon i {
            font-size: 24px;
        }
        
        .contact-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: #1F2937;
        }
        
        /* 页脚 */
        .footer {
            background-color: #1F2937;
            color: #D1D5DB;
            padding: 40px 0 20px;
        }
        
        .footer-content {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 30px;
            margin-bottom: 30px;
        }
        
        .footer-column {
            flex: 1;
            min-width: 200px;
        }
        
        .footer-column h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 15px;
            color: white;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 10px;
        }
        
        .footer-links a {
            color: #D1D5DB;
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.3s ease;
        }
        
        .footer-links a:hover {
            color: white;
        }
        
        .footer-bottom {
            border-top: 1px solid #374151;
            padding-top: 20px;
            text-align: center;
            font-size: 0.9rem;
        }
        
        .footer-bottom a {
            color: #9CA3AF;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        
        .footer-bottom a:hover {
            color: white;
        }
        
        /* 返回顶部按钮 */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: #4F46E5;
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            z-index: 1000;
        }
        
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        
        .back-to-top:hover {
            background-color: #4338CA;
            transform: translateY(-5px);
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .hero-content {
                flex-direction: column;
            }
            
            .hero-text {
                text-align: center;
                margin-bottom: 40px;
            }
            
            .nav-menu {
                margin-left: 20px;
            }
            
            .nav-menu li {
                margin-right: 20px;
            }
        }
        
        @media (max-width: 768px) {
            /* 隐藏电脑端导航菜单和按钮 */
            .nav-menu {
                display: none;
            }
            
            .nav-buttons {
                display: none;
            }
            
            /* 显示移动端菜单按钮 */
            .mobile-menu-btn {
                display: block;
            }
        }
        
        @media (max-width: 576px) {
            .hero-title {
                font-size: 1.8rem;
            }
            
            .section-title {
                font-size: 1.5rem;
            }
            
            .features-grid,
            .interfaces-grid,
            .solutions-grid,
            .steps-grid,
            .core-grid,
            .contact-grid {
                grid-template-columns: 1fr;
            }
            
            .footer-content {
                flex-direction: column;
            }
        }