:root {
            --primary-color: #00a95c;
            --primary-dark: #008d4c;
            --secondary-color: #f5f5f5;
            --accent-color: #ff6a00;
            --text-dark: #333;
            --text-light: #666;
            --white: #fff;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
        }
        
        body {
            background-color: #f8f9fa;
            color: var(--text-dark);
            overflow-x: hidden;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 导航栏 */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            z-index: 1000;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        
        .nav-container {
            display: flex;
            justify-content: flex-start;
            align-items: center;
            padding: 15px 0;
        }
        
        .logo {
            height: 36px;
        }
        
        /* 英雄区域 */
        .hero {
            padding: 150px 0 100px;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            position: relative;
            overflow: hidden;
        }
        
        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 169, 92, 0.1) 0%, rgba(0, 169, 92, 0) 70%);
            border-radius: 50%;
        }
        
        .hero-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        
        .hero-text {
            flex: 1;
            max-width: 600px;
        }
        
        .hero-image {
            flex: 1;
            text-align: center;
            animation: float 6s ease-in-out infinite;
        }
        
        @keyframes float {
            0% { transform: translateY(0px); }
            50% { transform: translateY(-20px); }
            100% { transform: translateY(0px); }
        }
        
        .hero-image img {
            max-width: 100%;
            filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.1));
        }
        
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 20px;
            background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        
        .hero p {
            font-size: 1.2rem;
            color: var(--text-light);
            margin-bottom: 30px;
            line-height: 1.6;
        }
        
        .download-buttons {
            display: flex;
            gap: 20px;
            margin-bottom: 30px;
        }
        
        .btn {
            display: inline-flex;
            align-items: center;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            box-shadow: var(--shadow);
            position: relative;
            overflow: hidden;
        }
        
        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
            transition: var(--transition);
        }
        
        .btn:hover::before {
            left: 100%;
        }
        
        .btn-primary {
            background: var(--primary-color);
            color: var(--white);
        }
        
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 6px 15px rgba(0, 169, 92, 0.3);
        }
        
        .btn-secondary {
            background: var(--white);
            color: var(--primary-color);
            border: 2px solid var(--primary-color);
        }
        
        .btn-secondary:hover {
            background: var(--primary-color);
            color: var(--white);
            transform: translateY(-3px);
        }
        
        .btn-icon {
            margin-right: 8px;
            font-size: 1.2rem;
        }
        
        .hero-features {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 40px;
        }
        
        .feature-tag {
            background: rgba(255, 255, 255, 0.7);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 0.9rem;
            color: var(--text-light);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        
        .feature-tag:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
        }
        
        /* 功能卡片区域 - 创新设计 */
        .features {
            padding: 80px 0;
            background: var(--white);
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .section-title h2 {
            font-size: 2.5rem;
            margin-bottom: 15px;
            color: var(--text-dark);
        }
        
        .section-title p {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
        }
        
        .features-container {
            position: relative;
            height: 450px;
            margin: 0 auto;
            max-width: 900px;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        
        .features-ring {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 400px;
            height: 400px;
            border-radius: 50%;
            border: 2px dashed rgba(0, 169, 92, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .features-center {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 100px;
            height: 100px;
            background: var(--primary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 1rem;
            box-shadow: 0 10px 20px rgba(0, 169, 92, 0.3);
            z-index: 10;
        }
        
        .feature-item {
            position: absolute;
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background: white;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow);
            transition: var(--transition);
            cursor: pointer;
            z-index: 5;
            text-align: center;
            padding: 15px;
        }
        
        .feature-item:hover {
            transform: scale(1.1);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
            z-index: 20;
        }
        
        .feature-item.active {
            transform: scale(1.15);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
            z-index: 25;
        }
        
        .feature-icon {
            width: 40px;
            height: 40px;
            margin-bottom: 8px;
        }
        
        .feature-item h3 {
            font-size: 0.85rem;
            margin-bottom: 5px;
            color: var(--text-dark);
        }
        
        .feature-item p {
            font-size: 0.65rem;
            color: var(--text-light);
            line-height: 1.2;
        }
        
        .feature-description {
            position: absolute;
            width: 300px;
            padding: 20px;
            background: white;
            border-radius: 15px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            opacity: 0;
            pointer-events: none;
            transition: var(--transition);
            z-index: 30;
        }
        
        .feature-description.left {
            left: 0;
            top: 50%;
            transform: translateY(-50%);
        }
        
        .feature-description.right {
            right: 0;
            top: 50%;
            transform: translateY(-50%);
        }
        
        .feature-description.active {
            opacity: 1;
        }
        
        .feature-description h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
            color: var(--primary-color);
        }
        
        .feature-description p {
            color: var(--text-light);
            line-height: 1.5;
            margin-bottom: 15px;
            font-size: 0.9rem;
        }
        
        .feature-description .btn {
            padding: 8px 20px;
            font-size: 0.9rem;
        }
        
        /* 安全防护区域 */
        .security {
            padding: 80px 0;
            background: linear-gradient(135deg, #e3f2fd 0%, #f5f7fa 100%);
        }
        
        .security-tabs {
            display: flex;
            gap: 10px;
            margin-bottom: 40px;
            flex-wrap: wrap;
            justify-content: center;
        }
        
        .tab-btn {
            padding: 12px 25px;
            background: var(--white);
            border: none;
            border-radius: 50px;
            font-weight: 600;
            color: var(--text-light);
            cursor: pointer;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        
        .tab-btn.active {
            background: var(--primary-color);
            color: var(--white);
        }
        
        .tab-btn:hover:not(.active) {
            background: rgba(0, 169, 92, 0.1);
            color: var(--primary-color);
        }
        
        .tab-content {
            display: none;
            animation: fadeIn 0.5s ease;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .tab-content.active {
            display: block;
        }
        
        .security-feature {
            display: flex;
            align-items: center;
            gap: 50px;
            background: var(--white);
            border-radius: 20px;
            padding: 40px;
            box-shadow: var(--shadow);
        }
        
        .security-text {
            flex: 1;
        }
        
        .security-image {
            flex: 1;
            text-align: center;
        }
        
        .security-image img {
            max-width: 100%;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }
        
        .security-text h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            color: var(--text-dark);
        }
        
        .security-text p {
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 25px;
        }
        
        .security-features-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
            margin-bottom: 25px;
        }
        
        .security-feature-item {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .security-feature-icon {
            width: 24px;
            height: 24px;
            background: rgba(0, 169, 92, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-color);
            font-size: 0.8rem;
        }
        
        .security-feature-text {
            font-size: 0.9rem;
            color: var(--text-light);
        }
        
        /* 统计数据区域 */
        .stats {
            padding: 80px 0;
            background: var(--white);
        }
        
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
        }
        
        .stat-card {
            text-align: center;
            padding: 30px 20px;
            border-radius: 15px;
            background: var(--secondary-color);
            transition: var(--transition);
        }
        
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
        }
        
        .stat-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .stat-label {
            color: var(--text-light);
            font-size: 1.1rem;
        }
        
        /* FAQ问答区域 */
        .faq {
            padding: 80px 0;
            background: linear-gradient(135deg, #f5f7fa 0%, #e3f2fd 100%);
        }
        
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .faq-item {
            background: var(--white);
            border-radius: 10px;
            margin-bottom: 15px;
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: var(--transition);
        }
        
        .faq-item:hover {
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        
        .faq-question {
            padding: 20px 25px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            color: var(--text-dark);
            transition: var(--transition);
        }
        
        .faq-question:hover {
            background: rgba(0, 169, 92, 0.05);
        }
        
        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            color: var(--primary-color);
            transition: var(--transition);
        }
        
        .faq-item.active .faq-question::after {
            transform: rotate(45deg);
        }
        
        .faq-answer {
            padding: 0 25px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            color: var(--text-light);
            line-height: 1.6;
        }
        
        .faq-item.active .faq-answer {
            padding: 0 25px 20px;
            max-height: 500px;
        }
        
        /* 页脚 */
        .footer {
            background: #1a1a1a;
            color: var(--white);
            padding: 30px 0;
        }
        
        .footer-bottom {
            text-align: center;
            color: #777;
            font-size: 0.9rem;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .hero-content {
                flex-direction: column;
                text-align: center;
            }
            
            .hero-text {
                margin-bottom: 50px;
            }
            
            .security-feature {
                flex-direction: column;
            }
            
            .security-image {
                order: -1;
                margin-bottom: 30px;
            }
            
            .features-container {
                height: 500px;
            }
            
            .features-ring {
                width: 350px;
                height: 350px;
            }
            
            .feature-item {
                width: 100px;
                height: 100px;
            }
            
            .feature-description {
                width: 250px;
            }
        }
        
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            
            .download-buttons {
                flex-direction: column;
                align-items: center;
            }
            
            .btn {
                width: 100%;
                max-width: 300px;
                justify-content: center;
            }
            
            .features-container {
                height: auto;
                flex-direction: column;
            }
            
            .features-ring {
                display: none;
            }
            
            .features-center {
                display: none;
            }
            
            .feature-item {
                position: static;
                width: 100%;
                height: auto;
                margin-bottom: 15px;
                border-radius: 10px;
                flex-direction: row;
                text-align: left;
                padding: 20px;
            }
            
            .feature-icon {
                margin-bottom: 0;
                margin-right: 15px;
            }
            
            .feature-description {
                position: static;
                transform: none;
                width: 100%;
                margin-top: 20px;
            }
            
            .security-features-list {
                grid-template-columns: 1fr;
            }
        }