* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
        }
        
        :root {
            --primary-color: #00a95c;
            --primary-dark: #008d4c;
            --primary-light: #e8f7f0;
            --secondary-color: #2d3748;
            --accent-color: #ff6a00;
            --text-dark: #333;
            --text-light: #666;
            --white: #fff;
            --light-bg: #f8f9fa;
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        
        body {
            background-color: var(--light-bg);
            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, 0.98);
            backdrop-filter: blur(10px);
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
            padding: 12px 0;
        }
        
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            height: 32px;
        }
        
        .btn {
            display: inline-flex;
            align-items: center;
            padding: 10px 24px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            box-shadow: var(--shadow);
            font-size: 0.9rem;
        }
        
        .btn-primary {
            background: var(--primary-color);
            color: var(--white);
        }
        
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 169, 92, 0.3);
        }
        
        /* 标题横幅 */
        .title-banner {
            background: var(--primary-color);
            color: var(--white);
            padding: 120px 0 60px;
            text-align: center;
        }
        
        .title-banner h1 {
            font-size: 2.8rem;
            margin-bottom: 15px;
            line-height: 1.2;
        }
        
        .title-banner p {
            font-size: 1.2rem;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto;
        }
        
        /* 英雄区域 */
        .hero {
            padding: 80px 0;
            background: linear-gradient(135deg, #f5f7fa 0%, #e3f2fd 100%);
            position: relative;
            overflow: hidden;
        }
        
        .hero-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        
        .hero-text {
            flex: 1;
            max-width: 550px;
        }
        
        .hero-image {
            flex: 1;
            text-align: center;
            position: relative;
        }
        
        .hero-image img {
            max-width: 90%;
            filter: drop-shadow(0 15px 30px rgba(0, 0, 0, 0.1));
            animation: float 6s ease-in-out infinite;
        }
        
        @keyframes float {
            0% { transform: translateY(0px); }
            50% { transform: translateY(-15px); }
            100% { transform: translateY(0px); }
        }
        
        .hero h2 {
            font-size: 2.2rem;
            margin-bottom: 20px;
            color: var(--text-dark);
            line-height: 1.3;
        }
        
        .hero p {
            font-size: 1.1rem;
            color: var(--text-light);
            margin-bottom: 25px;
            line-height: 1.6;
        }
        
        .download-buttons {
            display: flex;
            gap: 15px;
            margin-bottom: 30px;
        }
        
        .btn-outline {
            background: transparent;
            color: var(--primary-color);
            border: 2px solid var(--primary-color);
        }
        
        .btn-outline:hover {
            background: var(--primary-color);
            color: var(--white);
            transform: translateY(-2px);
        }
        
        .hero-features {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 30px;
        }
        
        .feature-tag {
            background: rgba(255, 255, 255, 0.7);
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: var(--text-light);
            box-shadow: var(--shadow);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        
        .feature-tag:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
        }
        
        /* 功能展示区域 */
        .features {
            padding: 80px 0;
            background: var(--white);
            position: relative;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-title h2 {
            font-size: 2.2rem;
            margin-bottom: 15px;
            color: var(--text-dark);
            position: relative;
            display: inline-block;
        }
        
        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
            border-radius: 2px;
        }
        
        .section-title p {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
            margin: 0 auto;
            max-width: 1000px;
        }
        
        .feature-card {
            background: var(--white);
            border-radius: 15px;
            padding: 25px 20px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            height: 100%;
            border: 1px solid rgba(0, 0, 0, 0.03);
        }
        
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
            transform: scaleX(0);
            transform-origin: left;
            transition: var(--transition);
        }
        
        .feature-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 25px rgba(0, 0, 0, 0.1);
        }
        
        .feature-card:hover::before {
            transform: scaleX(1);
        }
        
        .feature-icon {
            width: 60px;
            height: 60px;
            background: var(--primary-light);
            border-radius: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            transition: var(--transition);
        }
        
        .feature-card:hover .feature-icon {
            background: var(--primary-color);
            transform: scale(1.05);
        }
        
        .feature-icon img {
            width: 30px;
            height: 30px;
            transition: var(--transition);
        }
        
        .feature-card:hover .feature-icon img {
            filter: brightness(0) invert(1);
        }
        
        .feature-card h3 {
            font-size: 1.2rem;
            margin-bottom: 12px;
            color: var(--text-dark);
        }
        
        .feature-card p {
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 18px;
            font-size: 0.9rem;
        }
        
        .feature-card .btn {
            margin-top: auto;
            padding: 8px 18px;
            font-size: 0.85rem;
        }
        
        /* 安全防护区域 */
        .security {
            padding: 80px 0;
            background: linear-gradient(135deg, #f5f7fa 0%, #e3f2fd 100%);
            position: relative;
        }
        
        .security-container {
            display: flex;
            align-items: center;
            gap: 50px;
        }
        
        .security-content {
            flex: 1;
        }
        
        .security-image {
            flex: 1;
            text-align: center;
        }
        
        .security-image img {
            max-width: 90%;
            border-radius: 12px;
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .security-content h2 {
            font-size: 2rem;
            margin-bottom: 20px;
            color: var(--text-dark);
        }
        
        .security-content p {
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 25px;
            font-size: 1rem;
        }
        
        .security-features {
            display: flex;
            flex-direction: column;
            gap: 18px;
            margin-bottom: 30px;
        }
        
        .security-feature {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        
        .security-feature-icon {
            width: 40px;
            height: 40px;
            background: var(--primary-light);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-color);
            font-size: 1rem;
        }
        
        .security-feature-text h4 {
            font-size: 1rem;
            margin-bottom: 4px;
            color: var(--text-dark);
        }
        
        .security-feature-text p {
            margin: 0;
            font-size: 0.85rem;
        }
        
        /* 统计数据区域 */
        .stats {
            padding: 70px 0;
            background: var(--white);
        }
        
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 25px;
        }
        
        .stat-card {
            text-align: center;
            padding: 25px 15px;
            border-radius: 15px;
            background: var(--white);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        
        .stat-icon {
            width: 50px;
            height: 50px;
            background: var(--primary-light);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 15px;
            color: var(--primary-color);
            font-size: 1.4rem;
        }
        
        .stat-number {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .stat-label {
            color: var(--text-light);
            font-size: 0.9rem;
        }
        
        /* 下载区域 */
        .download {
            padding: 60px 0;
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
            color: var(--white);
            text-align: center;
        }
        
        .download h2 {
            font-size: 2.2rem;
            margin-bottom: 15px;
        }
        
        .download p {
            font-size: 1.1rem;
            margin-bottom: 30px;
            max-width: 550px;
            margin-left: auto;
            margin-right: auto;
            opacity: 0.9;
        }
        
        .download-buttons-large {
            display: flex;
            gap: 15px;
            justify-content: center;
            margin-bottom: 20px;
        }
        
        .btn-large {
            padding: 12px 28px;
            font-size: 1rem;
        }
        
        .btn-white {
            background: var(--white);
            color: var(--primary-color);
        }
        
        .btn-white:hover {
            background: var(--light-bg);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255, 255, 255, 0.2);
        }
        
        .btn-transparent {
            background: transparent;
            color: var(--white);
            border: 2px solid var(--white);
        }
        
        .btn-transparent:hover {
            background: var(--white);
            color: var(--primary-color);
            transform: translateY(-2px);
        }
        
        /* 页脚 */
        .footer {
            background: var(--secondary-color);
            color: var(--white);
            padding: 30px 0 20px;
        }
        
        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .hero-content {
                flex-direction: column;
                text-align: center;
            }
            
            .hero-text {
                margin-bottom: 50px;
            }
            
            .security-container {
                flex-direction: column;
            }
            
            .security-content {
                order: 2;
            }
            
            .security-image {
                order: 1;
                margin-bottom: 30px;
            }
            
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .download-buttons-large {
                flex-direction: column;
                align-items: center;
            }
        }
        
        @media (max-width: 768px) {
            .title-banner h1 {
                font-size: 2.2rem;
            }
            
            .hero h2 {
                font-size: 1.8rem;
            }
            
            .section-title h2 {
                font-size: 1.8rem;
            }
            
            .features-grid {
                grid-template-columns: 1fr;
            }
            
            .stats-grid {
                grid-template-columns: 1fr;
            }
            
            .download h2 {
                font-size: 1.8rem;
            }
        }