* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }

        /* 导航栏样式 */
        .ef9dq1-navbar {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .ef9dq1-navbar-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

        .ef9dq1-logo {
            display: flex;
            align-items: center;
            font-size: 24px;
            font-weight: bold;
            color: white;
            text-decoration: none;
        }

        .ef9dq1-logo img {
            height: 40px;
            margin-right: 10px;
        }

        .ef9dq1-nav-menu {
            display: flex;
            list-style: none;
            gap: 30px;
        }

        .ef9dq1-nav-link {
            color: white;
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: opacity 0.3s ease;
            padding: 5px 0;
            border-bottom: 2px solid transparent;
        }

        .ef9dq1-nav-link:hover {
            opacity: 0.8;
            border-bottom-color: white;
        }

        /* 主容器 */
        .ef9dq1-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Hero区域 */
        .ef9dq1-hero {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 80px 20px;
            text-align: center;
        }

        .ef9dq1-hero-title {
            font-size: 48px;
            font-weight: bold;
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .ef9dq1-hero-subtitle {
            font-size: 18px;
            margin-bottom: 40px;
            opacity: 0.95;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .ef9dq1-download-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 30px;
        }

        .ef9dq1-btn-primary {
            background: white;
            color: #667eea;
            padding: 16px 40px;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        }

        .ef9dq1-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        }

        .ef9dq1-btn-secondary {
            background: transparent;
            color: white;
            padding: 16px 40px;
            border: 2px solid white;
            border-radius: 8px;
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .ef9dq1-btn-secondary:hover {
            background: white;
            color: #667eea;
        }

        .ef9dq1-version-info {
            font-size: 14px;
            opacity: 0.9;
        }

        /* 内容区域 */
        .ef9dq1-content-section {
            background: white;
            padding: 60px 20px;
            margin-top: -40px;
            position: relative;
            z-index: 10;
            border-radius: 8px;
            margin-bottom: 40px;
        }

        .ef9dq1-section-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .ef9dq1-section-title {
            font-size: 32px;
            font-weight: bold;
            color: #333;
            margin-bottom: 30px;
            text-align: center;
        }

        .ef9dq1-h1-title {
            font-size: 36px;
            font-weight: bold;
            color: #667eea;
            margin-bottom: 20px;
        }

        /* 下载信息卡片 */
        .ef9dq1-download-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-bottom: 50px;
        }

        .ef9dq1-card {
            background: #f8f9fa;
            padding: 30px;
            border-radius: 8px;
            border-left: 4px solid #667eea;
            transition: all 0.3s ease;
        }

        .ef9dq1-card:hover {
            box-shadow: 0 8px 20px rgba(102, 126, 234, 0.15);
            transform: translateY(-5px);
        }

        .ef9dq1-card-title {
            font-size: 18px;
            font-weight: bold;
            color: #333;
            margin-bottom: 15px;
        }

        .ef9dq1-card-content {
            font-size: 14px;
            color: #666;
            line-height: 1.8;
        }

        .ef9dq1-card-icon {
            font-size: 32px;
            margin-bottom: 15px;
        }

        /* 特性列表 */
        .ef9dq1-features {
            margin-bottom: 50px;
        }

        .ef9dq1-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 25px;
            margin-top: 30px;
        }

        .ef9dq1-feature-item {
            display: flex;
            gap: 15px;
        }

        .ef9dq1-feature-icon {
            color: #667eea;
            font-size: 24px;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .ef9dq1-feature-text {
            flex: 1;
        }

        .ef9dq1-feature-title {
            font-weight: bold;
            color: #333;
            margin-bottom: 5px;
        }

        .ef9dq1-feature-desc {
            font-size: 14px;
            color: #666;
        }

        /* 系统要求 */
        .ef9dq1-requirements {
            background: #f0f4ff;
            padding: 30px;
            border-radius: 8px;
            margin-bottom: 40px;
        }

        .ef9dq1-requirements-title {
            font-size: 20px;
            font-weight: bold;
            color: #333;
            margin-bottom: 20px;
        }

        .ef9dq1-requirements-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
        }

        .ef9dq1-requirement-item {
            background: white;
            padding: 15px;
            border-radius: 6px;
            border-left: 3px solid #667eea;
        }

        .ef9dq1-requirement-label {
            font-size: 12px;
            color: #999;
            text-transform: uppercase;
            font-weight: bold;
            margin-bottom: 5px;
        }

        .ef9dq1-requirement-value {
            font-size: 14px;
            color: #333;
            font-weight: 500;
        }

        /* FAQ区域 */
        .ef9dq1-faq {
            margin-bottom: 50px;
        }

        .ef9dq1-faq-items {
            margin-top: 30px;
        }

        .ef9dq1-faq-item {
            background: #f8f9fa;
            padding: 20px;
            margin-bottom: 15px;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.3s ease;
            border-left: 4px solid transparent;
        }

        .ef9dq1-faq-item:hover {
            border-left-color: #667eea;
            background: #f0f4ff;
        }

        .ef9dq1-faq-question {
            font-weight: bold;
            color: #333;
            font-size: 16px;
            margin-bottom: 10px;
        }

        .ef9dq1-faq-answer {
            color: #666;
            font-size: 14px;
            line-height: 1.8;
        }

        /* CTA区域 */
        .ef9dq1-cta-section {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 60px 20px;
            text-align: center;
            border-radius: 8px;
            margin-bottom: 50px;
        }

        .ef9dq1-cta-title {
            font-size: 36px;
            font-weight: bold;
            margin-bottom: 20px;
        }

        .ef9dq1-cta-text {
            font-size: 18px;
            margin-bottom: 30px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 页脚 */
        .ef9dq1-footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 50px 20px 30px;
        }

        .ef9dq1-footer-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .ef9dq1-footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .ef9dq1-footer-section-title {
            font-weight: bold;
            margin-bottom: 15px;
            font-size: 16px;
        }

        .ef9dq1-footer-link {
            color: #bdc3c7;
            text-decoration: none;
            font-size: 14px;
            display: block;
            margin-bottom: 10px;
            transition: color 0.3s ease;
        }

        .ef9dq1-footer-link:hover {
            color: white;
        }

        .ef9dq1-footer-bottom {
            border-top: 1px solid #34495e;
            padding-top: 20px;
            text-align: center;
            font-size: 14px;
            color: #95a5a6;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .ef9dq1-hero-title {
                font-size: 32px;
            }

            .ef9dq1-hero-subtitle {
                font-size: 16px;
            }

            .ef9dq1-navbar-container {
                height: 60px;
            }

            .ef9dq1-nav-menu {
                gap: 15px;
            }

            .ef9dq1-nav-link {
                font-size: 12px;
            }

            .ef9dq1-download-buttons {
                flex-direction: column;
                align-items: center;
            }

            .ef9dq1-btn-primary,
            .ef9dq1-btn-secondary {
                width: 100%;
                max-width: 300px;
            }

            .ef9dq1-section-title {
                font-size: 24px;
            }

            .ef9dq1-h1-title {
                font-size: 24px;
            }

            .ef9dq1-cta-title {
                font-size: 24px;
            }
        }

        @media (max-width: 480px) {
            .ef9dq1-nav-menu {
                gap: 10px;
            }

            .ef9dq1-hero-title {
                font-size: 24px;
            }

            .ef9dq1-hero {
                padding: 50px 15px;
            }

            .ef9dq1-content-section {
                padding: 30px 15px;
            }
        }