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

        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: #f9f9f9;
        }

        /* 导航栏样式 */
        .sw9d9n-navbar {
            background-color: #fff;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .sw9d9n-navbar-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

        .sw9d9n-logo {
            display: flex;
            align-items: center;
            font-size: 24px;
            font-weight: bold;
            color: #4285f4;
            text-decoration: none;
        }

        .sw9d9n-logo img {
            height: 40px;
            margin-right: 10px;
        }

        .sw9d9n-nav-menu {
            display: flex;
            gap: 30px;
            list-style: none;
        }

        .sw9d9n-nav-link {
            color: #333;
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s ease;
            padding: 8px 0;
        }

        .sw9d9n-nav-link:hover {
            color: #4285f4;
            border-bottom: 2px solid #4285f4;
        }

        /* 英雄区样式 */
        .sw9d9n-hero {
            background: linear-gradient(135deg, #4285f4 0%, #1a73e8 100%);
            color: white;
            padding: 80px 20px;
            text-align: center;
        }

        .sw9d9n-hero-container {
            max-width: 1000px;
            margin: 0 auto;
        }

        .sw9d9n-hero-title {
            font-size: 48px;
            font-weight: 700;
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .sw9d9n-hero-subtitle {
            font-size: 20px;
            margin-bottom: 40px;
            opacity: 0.95;
            line-height: 1.5;
        }

        .sw9d9n-hero-image {
            margin-top: 40px;
        }

        .sw9d9n-hero-image img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }

        /* 下载区样式 */
        .sw9d9n-download-section {
            background-color: white;
            padding: 60px 20px;
            margin-top: -40px;
            position: relative;
            z-index: 10;
        }

        .sw9d9n-download-container {
            max-width: 1000px;
            margin: 0 auto;
        }

        .sw9d9n-download-title {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 40px;
            text-align: center;
            color: #1a1a1a;
        }

        .sw9d9n-download-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            justify-content: center;
            margin-bottom: 40px;
        }

        .sw9d9n-btn-primary {
            background-color: #4285f4;
            color: white;
            padding: 16px 40px;
            font-size: 16px;
            font-weight: 600;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(66, 133, 244, 0.3);
            text-decoration: none;
            display: inline-block;
        }

        .sw9d9n-btn-primary:hover {
            background-color: #1a73e8;
            box-shadow: 0 6px 16px rgba(26, 115, 232, 0.4);
            transform: translateY(-2px);
        }

        .sw9d9n-btn-secondary {
            background-color: #f1f3f4;
            color: #1a1a1a;
            padding: 16px 40px;
            font-size: 16px;
            font-weight: 600;
            border: 1px solid #dadce0;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .sw9d9n-btn-secondary:hover {
            background-color: #dadce0;
            border-color: #999;
        }

        /* 系统要求 */
        .sw9d9n-requirements {
            background-color: #f8f9fa;
            padding: 30px;
            border-radius: 8px;
            margin-bottom: 30px;
        }

        .sw9d9n-requirements-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 20px;
            color: #1a1a1a;
        }

        .sw9d9n-requirements-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }

        .sw9d9n-requirement-item {
            padding: 15px;
            background-color: white;
            border-radius: 6px;
            border-left: 4px solid #4285f4;
        }

        .sw9d9n-requirement-label {
            font-weight: 600;
            color: #4285f4;
            font-size: 14px;
            margin-bottom: 5px;
        }

        .sw9d9n-requirement-value {
            color: #555;
            font-size: 14px;
        }

        /* 版本信息 */
        .sw9d9n-versions {
            margin-top: 30px;
        }

        .sw9d9n-versions-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 20px;
            color: #1a1a1a;
        }

        .sw9d9n-version-card {
            background-color: white;
            padding: 20px;
            border-radius: 8px;
            margin-bottom: 15px;
            border: 1px solid #dadce0;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .sw9d9n-version-info h4 {
            font-size: 16px;
            margin-bottom: 5px;
            color: #1a1a1a;
        }

        .sw9d9n-version-info p {
            font-size: 13px;
            color: #666;
        }

        .sw9d9n-version-size {
            background-color: #f1f3f4;
            padding: 8px 15px;
            border-radius: 6px;
            font-size: 13px;
            color: #555;
            font-weight: 500;
        }

        /* 特性区 */
        .sw9d9n-features {
            background-color: white;
            padding: 60px 20px;
        }

        .sw9d9n-features-container {
            max-width: 1000px;
            margin: 0 auto;
        }

        .sw9d9n-features-title {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 50px;
            text-align: center;
            color: #1a1a1a;
        }

        .sw9d9n-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .sw9d9n-feature-card {
            text-align: center;
            padding: 30px;
            background-color: #f9f9f9;
            border-radius: 8px;
            transition: all 0.3s ease;
        }

        .sw9d9n-feature-card:hover {
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
            transform: translateY(-5px);
        }

        .sw9d9n-feature-icon {
            font-size: 40px;
            margin-bottom: 15px;
        }

        .sw9d9n-feature-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            color: #1a1a1a;
        }

        .sw9d9n-feature-description {
            font-size: 14px;
            color: #666;
            line-height: 1.6;
        }

        /* 常见问题 */
        .sw9d9n-faq {
            background-color: #f9f9f9;
            padding: 60px 20px;
        }

        .sw9d9n-faq-container {
            max-width: 1000px;
            margin: 0 auto;
        }

        .sw9d9n-faq-title {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 50px;
            text-align: center;
            color: #1a1a1a;
        }

        .sw9d9n-faq-item {
            background-color: white;
            margin-bottom: 15px;
            border-radius: 8px;
            border: 1px solid #dadce0;
            overflow: hidden;
        }

        .sw9d9n-faq-question {
            padding: 20px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            color: #1a1a1a;
            transition: background-color 0.3s ease;
        }

        .sw9d9n-faq-question:hover {
            background-color: #f1f3f4;
        }

        .sw9d9n-faq-toggle {
            font-size: 20px;
            color: #4285f4;
        }

        .sw9d9n-faq-answer {
            padding: 0 20px 20px 20px;
            color: #555;
            line-height: 1.8;
            display: none;
        }

        .sw9d9n-faq-answer.active {
            display: block;
        }

        /* 页脚 */
        .sw9d9n-footer {
            background-color: #202124;
            color: #9aa0a6;
            padding: 40px 20px;
            font-size: 14px;
        }

        .sw9d9n-footer-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .sw9d9n-footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }

        .sw9d9n-footer-section h3 {
            color: white;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 15px;
        }

        .sw9d9n-footer-section ul {
            list-style: none;
        }

        .sw9d9n-footer-section li {
            margin-bottom: 10px;
        }

        .sw9d9n-footer-section a {
            color: #9aa0a6;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .sw9d9n-footer-section a:hover {
            color: white;
        }

        .sw9d9n-footer-bottom {
            border-top: 1px solid #3c4043;
            padding-top: 20px;
            text-align: center;
        }

        /* CTA区 */
        .sw9d9n-cta {
            background: linear-gradient(135deg, #4285f4 0%, #1a73e8 100%);
            color: white;
            padding: 60px 20px;
            text-align: center;
        }

        .sw9d9n-cta-container {
            max-width: 1000px;
            margin: 0 auto;
        }

        .sw9d9n-cta-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .sw9d9n-cta-description {
            font-size: 16px;
            margin-bottom: 30px;
            opacity: 0.95;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .sw9d9n-hero-title {
                font-size: 32px;
            }

            .sw9d9n-hero-subtitle {
                font-size: 16px;
            }

            .sw9d9n-hero {
                padding: 50px 20px;
            }

            .sw9d9n-download-title {
                font-size: 28px;
            }

            .sw9d9n-features-title {
                font-size: 28px;
            }

            .sw9d9n-faq-title {
                font-size: 28px;
            }

            .sw9d9n-cta-title {
                font-size: 24px;
            }

            .sw9d9n-nav-menu {
                gap: 15px;
            }

            .sw9d9n-nav-link {
                font-size: 12px;
            }

            .sw9d9n-download-buttons {
                flex-direction: column;
            }

            .sw9d9n-btn-primary,
            .sw9d9n-btn-secondary {
                width: 100%;
            }

            .sw9d9n-version-card {
                flex-direction: column;
                align-items: flex-start;
            }

            .sw9d9n-version-size {
                margin-top: 10px;
                align-self: flex-start;
            }
        }

        @media (max-width: 480px) {
            .sw9d9n-hero-title {
                font-size: 24px;
            }

            .sw9d9n-nav-menu {
                display: none;
            }

            .sw9d9n-navbar-container {
                height: 60px;
            }

            .sw9d9n-logo {
                font-size: 18px;
            }

            .sw9d9n-logo img {
                height: 30px;
            }

            .sw9d9n-requirements-grid {
                grid-template-columns: 1fr;
            }

            .sw9d9n-features-grid {
                grid-template-columns: 1fr;
            }
        }