:root {
            --primary-blue: #1652F0;
            --secondary-blue: #0A41C4;
            --accent-green: #00D2D3;
            --dark-bg: #0F1421;
            --light-bg: #F8F9FA;
            --text-dark: #212529;
            --text-light: #6C757D;
        }
        
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6;
            color: var(--text-dark);
            overflow-x: hidden;
        }
        
        /* 导航栏样式 */
        .navbar {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
            padding: 15px 0;
            transition: all 0.3s ease;
        }
        
        .navbar.scrolled {
            padding: 10px 0;
            backdrop-filter: blur(10px);
            background-color: rgba(255, 255, 255, 0.95);
        }
        
        .navbar-brand {
            font-weight: 700;
            font-size: 26px;
            color: var(--primary-blue);
        }
        
        .navbar-brand span {
            color: var(--text-dark);
        }
        
        .nav-link {
            font-weight: 500;
            color: var(--text-dark) !important;
            margin: 0 8px;
            transition: color 0.3s ease;
        }
        
        .nav-link:hover, .nav-link.active {
            color: var(--primary-blue) !important;
        }
        
        .download-btn-nav {
            background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
            color: white;
            border-radius: 8px;
            padding: 8px 20px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        
        .download-btn-nav:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(22, 82, 240, 0.3);
            color: white;
        }
        
        /* 英雄区域样式 */
        .hero-section {
            background: linear-gradient(135deg, var(--dark-bg) 0%, #1A2238 100%);
            color: white;
            padding: 140px 0 100px;
            position: relative;
            overflow: hidden;
        }
        
        .hero-bg-pattern {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            opacity: 0.05;
            background-image: 
                radial-gradient(circle at 20% 30%, var(--accent-green) 0%, transparent 20%),
                radial-gradient(circle at 80% 70%, var(--primary-blue) 0%, transparent 20%);
        }
        
        .hero-content h1 {
            font-size: 3.2rem;
            font-weight: 700;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        
        .hero-highlight {
            color: var(--accent-green);
            position: relative;
            display: inline-block;
        }
        
        .hero-highlight::after {
            content: '';
            position: absolute;
            bottom: 5px;
            left: 0;
            width: 100%;
            height: 8px;
            background-color: rgba(0, 210, 211, 0.2);
            z-index: -1;
        }
        
        .hero-subtitle {
            font-size: 1.3rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 30px;
            max-width: 600px;
        }
        
        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-bottom: 40px;
        }
        
        .badge-item {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 50px;
            padding: 8px 20px;
            font-size: 0.9rem;
            backdrop-filter: blur(5px);
        }
        
        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-bottom: 30px;
        }
        
        .btn-download-main {
            background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
            color: white;
            padding: 14px 30px;
            border-radius: 10px;
            font-weight: 600;
            border: none;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }
        
        .btn-download-main:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(22, 82, 240, 0.3);
            color: white;
        }
        
        .btn-outline-light {
            border: 2px solid rgba(255, 255, 255, 0.3);
            padding: 12px 28px;
            border-radius: 10px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.5);
        }
        
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            margin-top: 30px;
        }
        
        .stat-item {
            text-align: center;
        }
        
        .stat-number {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--accent-green);
            line-height: 1;
        }
        
        .stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 5px;
        }
        
        .hero-image {
            position: relative;
            animation: float 6s ease-in-out infinite;
        }
        
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-15px); }
        }
        
        /* 特性区域样式 */
        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .section-title h2 {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }
        
        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: linear-gradient(to right, var(--primary-blue), var(--accent-green));
            border-radius: 2px;
        }
        
        .section-title p {
            color: var(--text-light);
            max-width: 700px;
            margin: 0 auto;
            font-size: 1.1rem;
        }
        
        .feature-card {
            background: white;
            border-radius: 15px;
            padding: 35px 30px;
            margin-bottom: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            height: 100%;
            border: 1px solid rgba(0, 0, 0, 0.05);
            position: relative;
            overflow: hidden;
        }
        
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 5px;
            height: 100%;
            background: linear-gradient(to bottom, var(--primary-blue), var(--accent-green));
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
        }
        
        .feature-icon {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
            border-radius: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 25px;
            color: white;
            font-size: 28px;
        }
        
        .feature-card h4 {
            font-weight: 700;
            margin-bottom: 15px;
            color: var(--text-dark);
            font-size: 1.3rem;
        }
        
        .feature-card p {
            color: var(--text-light);
            margin-bottom: 0;
        }
        
        /* 下载指南区域 */
        .download-guide {
            background: var(--light-bg);
            padding: 100px 0;
        }
        
        .guide-step {
            background: white;
            border-radius: 15px;
            padding: 30px;
            margin-bottom: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            text-align: center;
            transition: all 0.3s ease;
        }
        
        .guide-step:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
        }
        
        .step-number {
            display: inline-block;
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
            color: white;
            border-radius: 50%;
            line-height: 50px;
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 20px;
        }
        
        .guide-step h4 {
            font-weight: 600;
            margin-bottom: 15px;
            color: var(--text-dark);
        }
        
        .guide-step p {
            color: var(--text-light);
            margin-bottom: 0;
        }
        
        .qr-code-container {
            background: white;
            border-radius: 15px;
            padding: 30px;
            text-align: center;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
        }
        
        .qr-code {
            width: 180px;
            height: 180px;
            background: #f8f9fa;
            border-radius: 10px;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            color: var(--text-light);
            border: 1px solid #e9ecef;
        }
        
        /* 安全特性区域 */
        .security-section {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            padding: 100px 0;
        }
        
        .security-card {
            background: white;
            border-radius: 15px;
            padding: 30px;
            margin-bottom: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }
        
        .security-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
        }
        
        .security-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, var(--accent-green), #00b8a9);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: white;
            font-size: 24px;
        }
        
        /* FAQ区域样式 */
        .faq-accordion .accordion-item {
            border: none;
            margin-bottom: 15px;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .faq-accordion .accordion-button {
            background: white;
            border: none;
            font-weight: 600;
            padding: 20px 25px;
            box-shadow: none;
            color: var(--text-dark);
        }
        
        .faq-accordion .accordion-button:not(.collapsed) {
            background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
            color: white;
        }
        
        .faq-accordion .accordion-button::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23212529'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
        }
        
        .faq-accordion .accordion-button:not(.collapsed)::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='white'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
        }
        
        .faq-accordion .accordion-body {
            padding: 20px 25px;
            color: var(--text-light);
        }
        
        /* 下载区域样式 */
        .download-section {
            background: linear-gradient(135deg, var(--dark-bg) 0%, #1A2238 100%);
            color: white;
            padding: 100px 0;
            text-align: center;
        }
        
        .download-section h2 {
            font-size: 2.8rem;
            font-weight: 700;
            margin-bottom: 20px;
        }
        
        .download-section p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 700px;
            margin: 0 auto 50px;
        }
        
        .download-platforms {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 40px;
        }
        
        .platform-card {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 15px;
            padding: 30px;
            width: 220px;
            text-align: center;
            transition: all 0.3s ease;
            backdrop-filter: blur(5px);
        }
        
        .platform-card:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-5px);
            border-color: rgba(255, 255, 255, 0.3);
        }
        
        .platform-icon {
            font-size: 48px;
            margin-bottom: 20px;
            color: white;
        }
        
        .platform-card h4 {
            font-weight: 600;
            margin-bottom: 10px;
        }
        
        .platform-card p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
            margin-bottom: 20px;
        }
        
        .btn-platform {
            background: rgba(255, 255, 255, 0.2);
            color: white;
            border: none;
            border-radius: 8px;
            padding: 10px 20px;
            font-weight: 600;
            width: 100%;
            transition: all 0.3s ease;
        }
        
        .btn-platform:hover {
            background: rgba(255, 255, 255, 0.3);
            color: white;
        }
        
        /* 页脚样式 */
        footer {
            background: var(--dark-bg);
            color: rgba(255, 255, 255, 0.8);
            padding: 70px 0 30px;
        }
        
        .footer-logo {
            font-size: 28px;
            font-weight: 700;
            color: white;
            margin-bottom: 20px;
        }
        
        .footer-logo span {
            color: var(--accent-green);
        }
        
        .footer-links h5 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.1rem;
        }
        
        .footer-links ul {
            list-style: none;
            padding: 0;
        }
        
        .footer-links ul li {
            margin-bottom: 10px;
        }
        
        .footer-links ul li a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        
        .footer-links ul li a:hover {
            color: var(--accent-green);
        }
        
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 30px;
            margin-top: 50px;
            text-align: center;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
        }
        
        /* 响应式调整 */
        @media (max-width: 768px) {
            .hero-content h1 {
                font-size: 2.2rem;
            }
            
            .hero-subtitle {
                font-size: 1.1rem;
            }
            
            .section-title h2 {
                font-size: 2rem;
            }
            
            .platform-card {
                width: 100%;
                max-width: 300px;
            }
            
            .navbar-collapse {
                background: white;
                padding: 20px;
                border-radius: 10px;
                margin-top: 15px;
                box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            }
        }
        
        /* 动画效果 */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.8s ease, transform 0.8s ease;
        }
        
        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }