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

        html, body {
            width: 100%;
            height: 100%;
        }

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

        /* 导航栏样式 */
        .sw9d9n-navbar-wrapper {
            width: 100%;
            background-color: #fff;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .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-section {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            color: #333;
        }

        .sw9d9n-logo-img {
            width: 40px;
            height: 40px;
        }

        .sw9d9n-logo-text {
            font-size: 20px;
            font-weight: 700;
            color: #1f2937;
        }

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

        .sw9d9n-nav-link {
            text-decoration: none;
            color: #6b7280;
            font-size: 15px;
            font-weight: 500;
            transition: color 0.3s ease;
            padding: 8px 12px;
            border-radius: 4px;
        }

        .sw9d9n-nav-link:hover {
            color: #4285f4;
            background-color: #f0f7ff;
        }

        .sw9d9n-nav-link.active {
            color: #4285f4;
            border-bottom: 3px solid #4285f4;
        }

        /* 主内容区 */
        .sw9d9n-main-wrapper {
            min-height: calc(100vh - 70px);
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
        }

        .sw9d9n-hero-section {
            max-width: 1200px;
            margin: 0 auto;
            padding: 60px 20px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .sw9d9n-hero-content {
            color: #1f2937;
        }

        .sw9d9n-hero-title {
            font-size: 48px;
            font-weight: 700;
            margin-bottom: 24px;
            line-height: 1.2;
            color: #1f2937;
        }

        .sw9d9n-hero-subtitle {
            font-size: 18px;
            color: #6b7280;
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .sw9d9n-download-buttons {
            display: flex;
            gap: 16px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        .sw9d9n-btn-primary {
            background-color: #4285f4;
            color: #fff;
            padding: 14px 40px;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 12px rgba(66, 133, 244, 0.3);
        }

        .sw9d9n-btn-primary:hover {
            background-color: #3367d6;
            box-shadow: 0 6px 16px rgba(66, 133, 244, 0.4);
            transform: translateY(-2px);
        }

        .sw9d9n-btn-secondary {
            background-color: #fff;
            color: #4285f4;
            padding: 14px 40px;
            border: 2px solid #4285f4;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .sw9d9n-btn-secondary:hover {
            background-color: #f0f7ff;
            border-color: #3367d6;
            color: #3367d6;
        }

        .sw9d9n-hero-image {
            text-align: center;
        }

        .sw9d9n-hero-image img {
            max-width: 100%;
            height: auto;
            filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.15));
        }

        /* 版本信息 */
        .sw9d9n-version-info {
            background-color: rgba(255, 255, 255, 0.95);
            border-radius: 8px;
            padding: 20px;
            margin-top: 30px;
            font-size: 14px;
            color: #6b7280;
            line-height: 1.8;
        }

        .sw9d9n-version-item {
            display: flex;
            justify-content: space-between;
            padding: 8px 0;
            border-bottom: 1px solid #e5e7eb;
        }

        .sw9d9n-version-item:last-child {
            border-bottom: none;
        }

        .sw9d9n-version-label {
            font-weight: 600;
            color: #1f2937;
        }

        /* 特性区域 */
        .sw9d9n-features-section {
            background-color: #fff;
            padding: 80px 20px;
        }

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

        .sw9d9n-section-title {
            font-size: 36px;
            font-weight: 700;
            text-align: center;
            margin-bottom: 50px;
            color: #1f2937;
        }

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

        .sw9d9n-feature-card {
            background-color: #f9fafb;
            border-radius: 8px;
            padding: 30px;
            text-align: center;
            transition: all 0.3s ease;
            border: 1px solid #e5e7eb;
        }

        .sw9d9n-feature-card:hover {
            background-color: #fff;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
            transform: translateY(-4px);
        }

        .sw9d9n-feature-icon {
            font-size: 48px;
            margin-bottom: 16px;
            color: #4285f4;
        }

        .sw9d9n-feature-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 12px;
            color: #1f2937;
        }

        .sw9d9n-feature-desc {
            font-size: 14px;
            color: #6b7280;
            line-height: 1.8;
        }

        /* 系统要求 */
        .sw9d9n-requirements-section {
            background-color: #f3f4f6;
            padding: 60px 20px;
        }

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

        .sw9d9n-requirements-title {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 30px;
            color: #1f2937;
        }

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

        .sw9d9n-requirement-box {
            background-color: #fff;
            border-radius: 8px;
            padding: 24px;
            border-left: 4px solid #4285f4;
        }

        .sw9d9n-requirement-os {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 12px;
            color: #1f2937;
        }

        .sw9d9n-requirement-detail {
            font-size: 14px;
            color: #6b7280;
            line-height: 1.8;
        }

        .sw9d9n-requirement-detail strong {
            color: #1f2937;
        }

        /* CTA区域 */
        .sw9d9n-cta-section {
            background: linear-gradient(135deg, #4285f4 0%, #357ae8 100%);
            padding: 80px 20px;
            text-align: center;
            color: #fff;
        }

        .sw9d9n-cta-container {
            max-width: 900px;
            margin: 0 auto;
        }

        .sw9d9n-cta-title {
            font-size: 40px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .sw9d9n-cta-desc {
            font-size: 18px;
            margin-bottom: 40px;
            opacity: 0.95;
            line-height: 1.8;
        }

        .sw9d9n-cta-button {
            background-color: #fff;
            color: #4285f4;
            padding: 16px 48px;
            border: none;
            border-radius: 8px;
            font-size: 18px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        }

        .sw9d9n-cta-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
        }

        /* 页脚 */
        .sw9d9n-footer-wrapper {
            background-color: #1f2937;
            color: #d1d5db;
            padding: 60px 20px 30px;
        }

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

        .sw9d9n-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .sw9d9n-footer-column h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
            color: #fff;
        }

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

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

        .sw9d9n-footer-column a {
            color: #d1d5db;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s ease;
        }

        .sw9d9n-footer-column a:hover {
            color: #4285f4;
        }

        .sw9d9n-footer-bottom {
            border-top: 1px solid #374151;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 14px;
        }

        .sw9d9n-footer-copyright {
            color: #9ca3af;
        }

        .sw9d9n-footer-links {
            display: flex;
            gap: 20px;
        }

        .sw9d9n-footer-links a {
            color: #d1d5db;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .sw9d9n-footer-links a:hover {
            color: #4285f4;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .sw9d9n-hero-section {
                grid-template-columns: 1fr;
                padding: 40px 20px;
                gap: 40px;
            }

            .sw9d9n-hero-title {
                font-size: 32px;
            }

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

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

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

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

            .sw9d9n-nav-link {
                font-size: 13px;
                padding: 6px 8px;
            }

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

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

            .sw9d9n-cta-desc {
                font-size: 16px;
            }

            .sw9d9n-footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 480px) {
            .sw9d9n-navbar-container {
                height: 60px;
            }

            .sw9d9n-hero-section {
                padding: 30px 15px;
            }

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

            .sw9d9n-nav-menu {
                gap: 8px;
            }

            .sw9d9n-nav-link {
                font-size: 12px;
                padding: 4px 6px;
            }

            .sw9d9n-features-section,
            .sw9d9n-requirements-section,
            .sw9d9n-cta-section {
                padding: 40px 15px;
            }

            .sw9d9n-section-title {
                font-size: 22px;
                margin-bottom: 30px;
            }
        }

        /* 动画 */
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .sw9d9n-hero-content {
            animation: fadeIn 0.8s ease-out;
        }

        .sw9d9n-feature-card {
            animation: fadeIn 0.8s ease-out;
        }