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

        html, body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
        }

        /* 导航栏样式 */
        .yewq9-navbar-container {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            padding: 0 20px;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }

        .yewq9-navbar-wrapper {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .yewq9-logo-section {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: bold;
            color: white;
            font-size: 18px;
        }

        .yewq9-logo-section img {
            height: 40px;
            width: auto;
        }

        .yewq9-nav-links {
            display: flex;
            gap: 30px;
            align-items: center;
        }

        .yewq9-nav-link {
            color: white;
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: opacity 0.3s ease;
        }

        .yewq9-nav-link:hover {
            opacity: 0.8;
        }

        /* 主要内容区 */
        .yewq9-hero-section {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 80px 20px;
            text-align: center;
        }

        .yewq9-hero-wrapper {
            max-width: 1200px;
            margin: 0 auto;
        }

        .yewq9-hero-title {
            font-size: 48px;
            font-weight: bold;
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .yewq9-hero-subtitle {
            font-size: 20px;
            margin-bottom: 40px;
            opacity: 0.95;
        }

        .yewq9-cta-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }

        .yewq9-btn-primary {
            background: #ffffff;
            color: #667eea;
            padding: 16px 40px;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        }

        .yewq9-btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        }

        .yewq9-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;
        }

        .yewq9-btn-secondary:hover {
            background: white;
            color: #667eea;
        }

        .yewq9-version-info {
            background: rgba(255, 255, 255, 0.15);
            padding: 15px 20px;
            border-radius: 8px;
            display: inline-block;
            font-size: 14px;
        }

        /* 下载选项区 */
        .yewq9-download-section {
            background: #f8f9fa;
            padding: 60px 20px;
        }

        .yewq9-download-wrapper {
            max-width: 1200px;
            margin: 0 auto;
        }

        .yewq9-section-title {
            font-size: 36px;
            font-weight: bold;
            margin-bottom: 50px;
            text-align: center;
            color: #333;
        }

        .yewq9-download-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-bottom: 40px;
        }

        .yewq9-download-card {
            background: white;
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            text-align: center;
        }

        .yewq9-download-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
        }

        .yewq9-platform-icon {
            font-size: 48px;
            margin-bottom: 15px;
        }

        .yewq9-platform-name {
            font-size: 20px;
            font-weight: bold;
            margin-bottom: 10px;
            color: #333;
        }

        .yewq9-platform-version {
            font-size: 12px;
            color: #999;
            margin-bottom: 15px;
        }

        .yewq9-download-btn {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 12px 25px;
            border: none;
            border-radius: 6px;
            font-size: 14px;
            font-weight: bold;
            cursor: pointer;
            transition: transform 0.2s ease;
            width: 100%;
            margin-bottom: 12px;
        }

        .yewq9-download-btn:hover {
            transform: scale(1.02);
        }

        .yewq9-file-size {
            font-size: 12px;
            color: #666;
        }

        /* 功能介绍区 */
        .yewq9-features-section {
            background: white;
            padding: 60px 20px;
        }

        .yewq9-features-wrapper {
            max-width: 1200px;
            margin: 0 auto;
        }

        .yewq9-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-top: 40px;
        }

        .yewq9-feature-item {
            padding: 20px;
            border-left: 4px solid #667eea;
        }

        .yewq9-feature-icon {
            font-size: 32px;
            margin-bottom: 15px;
        }

        .yewq9-feature-title {
            font-size: 18px;
            font-weight: bold;
            margin-bottom: 10px;
            color: #333;
        }

        .yewq9-feature-desc {
            font-size: 14px;
            color: #666;
            line-height: 1.6;
        }

        /* 系统要求区 */
        .yewq9-requirements-section {
            background: #f8f9fa;
            padding: 60px 20px;
        }

        .yewq9-requirements-wrapper {
            max-width: 1200px;
            margin: 0 auto;
        }

        .yewq9-requirements-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }

        .yewq9-requirement-card {
            background: white;
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
        }

        .yewq9-requirement-title {
            font-size: 18px;
            font-weight: bold;
            margin-bottom: 15px;
            color: #333;
        }

        .yewq9-requirement-list {
            list-style: none;
        }

        .yewq9-requirement-list li {
            padding: 8px 0;
            color: #666;
            font-size: 14px;
            border-bottom: 1px solid #eee;
        }

        .yewq9-requirement-list li:last-child {
            border-bottom: none;
        }

        .yewq9-requirement-list li:before {
            content: "✓ ";
            color: #667eea;
            font-weight: bold;
            margin-right: 8px;
        }

        /* 常见问题区 */
        .yewq9-faq-section {
            background: white;
            padding: 60px 20px;
        }

        .yewq9-faq-wrapper {
            max-width: 1200px;
            margin: 0 auto;
        }

        .yewq9-faq-item {
            margin-bottom: 20px;
            border: 1px solid #e0e0e0;
            border-radius: 8px;
            overflow: hidden;
        }

        .yewq9-faq-question {
            background: #f8f9fa;
            padding: 20px;
            cursor: pointer;
            font-weight: bold;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: background 0.3s ease;
        }

        .yewq9-faq-question:hover {
            background: #e9ecef;
        }

        .yewq9-faq-toggle {
            font-size: 18px;
            color: #667eea;
        }

        .yewq9-faq-answer {
            padding: 20px;
            color: #666;
            font-size: 14px;
            line-height: 1.6;
            display: none;
            background: #fafafa;
        }

        .yewq9-faq-answer.active {
            display: block;
        }

        /* 页脚 */
        .yewq9-footer {
            background: #2c3e50;
            color: white;
            padding: 40px 20px;
        }

        .yewq9-footer-wrapper {
            max-width: 1200px;
            margin: 0 auto;
        }

        .yewq9-footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 30px;
        }

        .yewq9-footer-section h4 {
            font-size: 16px;
            margin-bottom: 15px;
            font-weight: bold;
        }

        .yewq9-footer-links {
            list-style: none;
        }

        .yewq9-footer-links li {
            margin-bottom: 10px;
        }

        .yewq9-footer-links a {
            color: #bbb;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s ease;
        }

        .yewq9-footer-links a:hover {
            color: white;
        }

        .yewq9-footer-bottom {
            border-top: 1px solid #444;
            padding-top: 20px;
            text-align: center;
            font-size: 14px;
            color: #999;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .yewq9-hero-title {
                font-size: 32px;
            }

            .yewq9-hero-subtitle {
                font-size: 16px;
            }

            .yewq9-nav-links {
                gap: 15px;
                font-size: 12px;
            }

            .yewq9-cta-buttons {
                flex-direction: column;
                align-items: center;
            }

            .yewq9-btn-primary,
            .yewq9-btn-secondary {
                width: 100%;
                max-width: 300px;
            }

            .yewq9-section-title {
                font-size: 28px;
            }

            .yewq9-download-grid {
                grid-template-columns: 1fr;
            }

            .yewq9-features-grid {
                grid-template-columns: 1fr;
            }

            .yewq9-requirements-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            .yewq9-navbar-wrapper {
                height: auto;
                flex-direction: column;
                padding: 15px 0;
                gap: 15px;
            }

            .yewq9-nav-links {
                flex-wrap: wrap;
                justify-content: center;
            }

            .yewq9-hero-title {
                font-size: 24px;
            }

            .yewq9-hero-subtitle {
                font-size: 14px;
            }

            .yewq9-btn-primary,
            .yewq9-btn-secondary {
                padding: 12px 20px;
                font-size: 14px;
            }
        }