/* 基础重置和变量定义 */
        :root {
            --primary-color: #3498db;
            --secondary-color: #2c3e50;
            --accent-color: #e74c3c;
            --light-color: #f9f9f9;
            --dark-color: #2c3e50;
            --text-color: #333;
            --text-light: #777;
            --border-color: #eaeaea;
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            --shadow-deep: 0 10px 30px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --transition-slow: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
            --border-radius: 8px;
            --container-width: 1200px;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #f8fafc;
            padding-top: 80px; /* 为固定头部留出空间 */
            overflow-x: hidden; /* 防止水平滚动 */
        }
        
        body.menu-open {
            overflow: hidden;
            height: 100vh;
        }
        
        a {
            text-decoration: none;
            color: var(--primary-color);
            transition: var(--transition);
        }
        
        ul {
            list-style: none;
        }
        
        img {
            max-width: 100%;
            height: auto;
        }
        
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .btn {
            display: inline-block;
            padding: 12px 28px;
            background-color: var(--primary-color);
            color: white;
            border-radius: var(--border-radius);
            font-weight: 600;
            cursor: pointer;
            border: none;
            transition: var(--transition);
            font-size: 16px;
        }
        
        .btn:hover {
            background-color: #2980b9;
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        
        .btn-secondary {
            background-color: var(--secondary-color);
        }
        
        .btn-secondary:hover {
            background-color: #1a252f;
        }
        
        .section {
            padding: 80px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-title h2 {
            font-size: 2.5rem;
            color: var(--secondary-color);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }
        
        .section-title h2:after {
            content: '';
            position: absolute;
            width: 70px;
            height: 4px;
            background-color: var(--primary-color);
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }
        
        .section-title p {
            color: var(--text-light);
            max-width: 700px;
            margin: 0 auto;
            font-size: 1.1rem;
        }
        
        /* ============== 优化后的头部样式 ============== */
        header {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            transition: var(--transition);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.2);
        }
        
        header.scrolled {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
            transition: var(--transition);
        }
        
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--secondary-color);
            display: flex;
            align-items: center;
            letter-spacing: -0.5px;
        }
        
        .logo i {
            color: var(--primary-color);
            margin-right: 12px;
            font-size: 2rem;
            background: linear-gradient(135deg, var(--primary-color), #2ecc71);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .logo span {
            color: var(--primary-color);
            font-weight: 700;
            background: linear-gradient(135deg, var(--primary-color), #2ecc71);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .logo:hover {
            transform: scale(1.03);
        }
        
        /* 桌面导航样式 */
        .desktop-nav {
            display: flex;
        }
        
        .desktop-nav ul {
            display: flex;
            align-items: center;
        }
        
        .desktop-nav ul li {
            margin-left: 30px;
            position: relative;
        }
        
        .desktop-nav ul li a {
            color: var(--secondary-color);
            font-weight: 600;
            font-size: 1rem;
            padding: 8px 0;
            position: relative;
        }
        
        .desktop-nav ul li a:after {
            content: '';
            position: absolute;
            width: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary-color), #2ecc71);
            bottom: 0;
            left: 0;
            border-radius: 3px;
            transition: var(--transition);
        }
        
        .desktop-nav ul li a:hover:after,
        .desktop-nav ul li a.active:after {
            width: 100%;
        }
        
        .desktop-nav ul li a:hover,
        .desktop-nav ul li a.active {
            color: var(--primary-color);
        }
        
        /* ============== 修复的手机端下拉菜单 ============== */
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--secondary-color);
            cursor: pointer;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            justify-content: center;
            align-items: center;
            transition: var(--transition);
            z-index: 1001;
            position: relative;
        }
        
        .mobile-menu-btn:hover {
            background-color: rgba(52, 152, 219, 0.1);
        }
        
        .mobile-menu-btn i {
            transition: var(--transition-slow);
        }
        
        .mobile-menu-btn.active i {
            transform: rotate(180deg);
        }
        
        /* 移动端菜单容器 - 修复版 */
        .mobile-menu-container {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh; /* 使用视口高度确保完全覆盖 */
            z-index: 999;
            pointer-events: none;
        }
        
        .mobile-menu-container.active {
            display: block;
            pointer-events: all;
        }
        
        /* 遮罩层 - 修复版 */
        .mobile-menu-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.6);
            opacity: 0;
            transition: opacity 0.3s ease;
            z-index: 1;
        }
        
        .mobile-menu-container.active .mobile-menu-overlay {
            opacity: 1;
        }
        
        /* 菜单内容 - 修复版，确保完全显示 */
        .mobile-menu-content {
            position: absolute;
            top: 0;
            right: 0;
            width: 85%;
            max-width: 320px;
            height: 100%; /* 使用100%确保菜单占满整个高度 */
            background: linear-gradient(135deg, #2c3e50 0%, #1a252f 100%);
            box-shadow: -5px 0 30px rgba(0, 0, 0, 0.2);
            transform: translateX(100%);
            transition: transform 0.4s cubic-bezier(0.23, 1, 0.32, 1);
            overflow: hidden; /* 防止内容溢出 */
            display: flex;
            flex-direction: column;
            z-index: 2;
        }
        
        .mobile-menu-container.active .mobile-menu-content {
            transform: translateX(0);
        }
        
        /* 菜单头部 - 修复版 */
        .mobile-menu-header {
            padding: 30px 25px 25px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            margin-bottom: 15px;
            flex-shrink: 0; /* 防止头部被压缩 */
        }
        
        .mobile-menu-logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
        }
        
        .mobile-menu-logo i {
            color: var(--primary-color);
            margin-right: 10px;
            font-size: 1.8rem;
            background: linear-gradient(135deg, var(--primary-color), #2ecc71);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .mobile-menu-logo span {
            background: linear-gradient(135deg, var(--primary-color), #2ecc71);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .mobile-menu-tagline {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
            margin-top: 8px;
        }
        
        /* 菜单项容器 - 修复版，确保内容可滚动 */
        .mobile-menu-nav {
            flex: 1;
            padding: 0 15px;
            overflow-y: auto; /* 允许垂直滚动 */
            -webkit-overflow-scrolling: touch; /* iOS平滑滚动 */
            min-height: 0; /* 防止Flexbox压缩问题 */
        }
        
        /* 隐藏滚动条但保持功能 */
        .mobile-menu-nav::-webkit-scrollbar {
            width: 4px;
        }
        
        .mobile-menu-nav::-webkit-scrollbar-track {
            background: rgba(255, 255, 255, 0.1);
            border-radius: 2px;
        }
        
        .mobile-menu-nav::-webkit-scrollbar-thumb {
            background: var(--primary-color);
            border-radius: 2px;
        }
        
        .mobile-menu-nav ul {
            display: flex;
            flex-direction: column;
        }
        
        .mobile-menu-nav li {
            margin-bottom: 8px;
            position: relative;
            overflow: hidden;
        }
        
        .mobile-menu-nav a {
            display: flex;
            align-items: center;
            padding: 16px 20px;
            color: rgba(255, 255, 255, 0.9);
            font-weight: 600;
            font-size: 1.1rem;
            border-radius: 8px;
            transition: all 0.3s ease;
            position: relative;
        }
        
        .mobile-menu-nav a i {
            margin-right: 15px;
            font-size: 1.2rem;
            width: 24px;
            text-align: center;
            color: var(--primary-color);
            transition: var(--transition);
        }
        
        .mobile-menu-nav a:hover,
        .mobile-menu-nav a.active {
            background: rgba(255, 255, 255, 0.1);
            color: white;
            transform: translateX(5px);
        }
        
        .mobile-menu-nav a:hover i,
        .mobile-menu-nav a.active i {
            transform: scale(1.2);
            color: #2ecc71;
        }
        
        /* 菜单底部 - 修复版 */
        .mobile-menu-footer {
            padding: 25px 25px 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 15px;
            flex-shrink: 0; /* 防止底部被压缩 */
            background: rgba(0, 0, 0, 0.1);
        }
        
        .mobile-menu-footer p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
            line-height: 1.5;
            margin-bottom: 10px;
        }
        
        /* 菜单关闭按钮 - 修复版 */
        .mobile-menu-close {
            position: absolute;
            top: 25px;
            right: 20px;
            background: rgba(255, 255, 255, 0.15);
            border: none;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            color: white;
            font-size: 1.2rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
            z-index: 10;
        }
        
        .mobile-menu-close:hover {
            background: rgba(255, 255, 255, 0.25);
            transform: rotate(90deg);
        }
        
        /* 响应式调整 */
        @media (max-width: 992px) {
            .desktop-nav {
                display: none;
            }
            
            .mobile-menu-btn {
                display: flex;
            }
            
            .logo {
                font-size: 1.6rem;
            }
            
            .logo i {
                font-size: 1.8rem;
            }
        }
        
        /* 小屏幕调整 - 确保菜单完全显示 */
        @media (max-width: 576px) {
            .logo {
                font-size: 1.4rem;
            }
            
            .logo i {
                font-size: 1.6rem;
                margin-right: 8px;
            }
            
            .mobile-menu-content {
                width: 90%;
                max-width: 300px;
            }
            
            .mobile-menu-header {
                padding: 25px 20px 20px;
            }
            
            .mobile-menu-nav a {
                padding: 14px 18px;
                font-size: 1rem;
            }
            
            .mobile-menu-footer {
                padding: 20px 20px 15px;
            }
        }
        
        /* 超小屏幕调整 */
        @media (max-width: 380px) {
            .mobile-menu-content {
                width: 100%;
                max-width: 100%;
            }
            
            .mobile-menu-nav a {
                padding: 12px 16px;
            }
            
            .mobile-menu-logo {
                font-size: 1.4rem;
            }
        }
        
        /* ============== 英雄区块样式 ============== */
        .hero {
            background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            padding: 100px 0;
            overflow: hidden;
            margin-top: -80px; /* 抵消固定头部的影响 */
            padding-top: 180px;
        }
        
        .hero-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        
        .hero-content {
            flex: 1;
            padding-right: 40px;
        }
        
        .hero-image {
            flex: 1;
            text-align: center;
        }
        
        .hero h1 {
            font-size: 3rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        
        .hero h1 span {
            background: linear-gradient(135deg, var(--primary-color), #2ecc71);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .hero p {
            font-size: 1.2rem;
            color: var(--text-light);
            margin-bottom: 30px;
            max-width: 600px;
        }
        
        .hero-buttons {
            display: flex;
            gap: 20px;
        }
        
        .hero-image img {
            max-width: 100%;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-deep);
            animation: float 6s ease-in-out infinite;
        }
        
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-20px); }
        }
        
        /* ============== 其余部分样式 ============== */
        /* 内容区块样式 */
        .content {
            background-color: white;
        }
        
        .content-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .content-card {
            background-color: var(--light-color);
            border-radius: var(--border-radius);
            padding: 30px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        
        .content-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow-deep);
        }
        
        .content-card i {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        
        .content-card h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: var(--secondary-color);
        }
        
        /* 特色服务区块样式 */
        .services {
            background-color: #f8fafc;
        }
        
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }
        
        .service-item {
            background-color: white;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        
        .service-item:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow-deep);
        }
        
        .service-icon {
            height: 80px;
            background: linear-gradient(135deg, var(--primary-color), #2ecc71);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 2rem;
        }
        
        .service-content {
            padding: 25px;
        }
        
        .service-content h3 {
            font-size: 1.4rem;
            margin-bottom: 15px;
            color: var(--secondary-color);
        }
        
        /* App下载指南样式 */
        .app-guide {
            background-color: white;
        }
        
        .app-container {
            display: flex;
            align-items: center;
            gap: 50px;
        }
        
        .app-image {
            flex: 1;
        }
        
        .app-content {
            flex: 1;
        }
        
        .app-steps {
            margin-top: 30px;
        }
        
        .app-step {
            display: flex;
            align-items: flex-start;
            margin-bottom: 25px;
        }
        
        .step-number {
            background: linear-gradient(135deg, var(--primary-color), #2ecc71);
            color: white;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            margin-right: 15px;
            flex-shrink: 0;
        }
        
        /* FAQ样式 */
        .faq {
            background-color: #f8fafc;
        }
        
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .faq-item {
            background-color: white;
            margin-bottom: 15px;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
        }
        
        .faq-question {
            padding: 20px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            color: var(--secondary-color);
        }
        
        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }
        
        .faq-answer.active {
            padding: 0 20px 20px;
            max-height: 500px;
        }
        
        .faq-question i {
            transition: var(--transition);
        }
        
        .faq-question.active i {
            transform: rotate(180deg);
        }
        
        /* 页脚样式 */
        footer {
            background-color: var(--secondary-color);
            color: white;
            padding: 60px 0 30px;
        }
        
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
        }
        
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 20px;
            color: white;
        }
        
        .footer-logo span {
            background: linear-gradient(135deg, var(--primary-color), #2ecc71);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .footer-description {
            max-width: 600px;
            margin-bottom: 30px;
            color: rgba(255, 255, 255, 0.8);
        }
        
        .footer-links {
            display: flex;
            gap: 30px;
            margin-bottom: 40px;
        }
        
        .footer-links a {
            color: rgba(255, 255, 255, 0.8);
        }
        
        .footer-links a:hover {
            color: white;
        }
        
        .copyright {
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            width: 100%;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .hero-container {
                flex-direction: column;
            }
            
            .hero-content {
                padding-right: 0;
                text-align: center;
                margin-bottom: 50px;
            }
            
            .hero h1 {
                font-size: 2.5rem;
            }
            
            .app-container {
                flex-direction: column;
            }
            
            .app-image {
                order: 2;
            }
            
            .app-content {
                order: 1;
            }
        }
        
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2rem;
            }
            
            .section-title h2 {
                font-size: 2rem;
            }
            
            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }
            
            .footer-links {
                flex-direction: column;
                gap: 15px;
            }
        }
        
        /* 关键词样式 - 自然融入 */
        .keyword {
            font-weight: 600;
            color: var(--primary-color);
        }
        
        /* 强调文本样式 */
        .highlight {
            background-color: rgba(52, 152, 219, 0.1);
            padding: 3px 8px;
            border-radius: 4px;
            font-weight: 500;
        }