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

        html {
            scroll-behavior: smooth;
        }

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

        .sw9d9n-header {
            background: linear-gradient(135deg, #ffffff 0%, #f5f5f5 100%);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .sw9d9n-navbar {
            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: 700;
            color: #1f2937;
            text-decoration: none;
        }

        .sw9d9n-logo img {
            height: 40px;
            margin-right: 12px;
        }

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

        .sw9d9n-nav-link {
            text-decoration: none;
            color: #4b5563;
            font-weight: 500;
            font-size: 15px;
            transition: all 0.3s ease;
            position: relative;
        }

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

        .sw9d9n-nav-link::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: #4285f4;
            transition: width 0.3s ease;
        }

        .sw9d9n-nav-link:hover::after {
            width: 100%;
        }

        .sw9d9n-hero {
            background: linear-gradient(135deg, #4285f4 0%, #34a853 50%, #fbbc04 100%);
            color: white;
            padding: 80px 20px;
            text-align: center;
        }

        .sw9d9n-hero-content {
            max-width: 900px;
            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;
            font-weight: 300;
        }

        .sw9d9n-cta-button {
            display: inline-block;
            background-color: white;
            color: #4285f4;
            padding: 14px 40px;
            border-radius: 25px;
            text-decoration: none;
            font-weight: 600;
            font-size: 16px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
            margin: 0 10px;
        }

        .sw9d9n-cta-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        }

        .sw9d9n-cta-secondary {
            background-color: transparent;
            color: white;
            border: 2px solid white;
        }

        .sw9d9n-cta-secondary:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }

        .sw9d9n-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .sw9d9n-section {
            padding: 80px 20px;
        }

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

        .sw9d9n-section-subtitle {
            font-size: 18px;
            color: #666;
            text-align: center;
            margin-bottom: 40px;
        }

        .sw9d9n-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 50px;
        }

        .sw9d9n-feature-card {
            background: white;
            padding: 35px;
            border-radius: 12px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            text-align: center;
        }

        .sw9d9n-feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
        }

        .sw9d9n-feature-icon {
            font-size: 48px;
            margin-bottom: 20px;
        }

        .sw9d9n-feature-title {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 15px;
            color: #1f2937;
        }

        .sw9d9n-feature-desc {
            font-size: 15px;
            color: #666;
            line-height: 1.6;
        }

        .sw9d9n-version-info {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            padding: 60px 20px;
        }

        .sw9d9n-version-box {
            background: white;
            padding: 40px;
            border-radius: 12px;
            max-width: 800px;
            margin: 0 auto;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
        }

        .sw9d9n-version-header {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 20px;
            color: #4285f4;
        }

        .sw9d9n-version-number {
            font-size: 18px;
            color: #666;
            margin-bottom: 30px;
        }

        .sw9d9n-changelog {
            margin-top: 40px;
        }

        .sw9d9n-changelog-title {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 25px;
            color: #1f2937;
        }

        .sw9d9n-changelog-item {
            padding: 15px 0;
            border-bottom: 1px solid #eee;
            display: flex;
            gap: 15px;
        }

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

        .sw9d9n-changelog-icon {
            color: #34a853;
            font-weight: bold;
            font-size: 20px;
            flex-shrink: 0;
        }

        .sw9d9n-changelog-text {
            color: #555;
            line-height: 1.6;
        }

        .sw9d9n-system-requirements {
            background: white;
            padding: 60px 20px;
        }

        .sw9d9n-requirements-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }

        .sw9d9n-requirement-card {
            background: #f8f9fa;
            padding: 30px;
            border-radius: 10px;
            border-left: 4px solid #4285f4;
        }

        .sw9d9n-requirement-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 15px;
            color: #1f2937;
        }

        .sw9d9n-requirement-list {
            list-style: none;
            padding: 0;
        }

        .sw9d9n-requirement-list li {
            padding: 8px 0;
            color: #666;
            font-size: 14px;
        }

        .sw9d9n-requirement-list li:before {
            content: "✓ ";
            color: #34a853;
            font-weight: bold;
            margin-right: 8px;
        }

        .sw9d9n-download-section {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 80px 20px;
            text-align: center;
        }

        .sw9d9n-download-title {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .sw9d9n-download-desc {
            font-size: 18px;
            margin-bottom: 40px;
            opacity: 0.9;
        }

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

        .sw9d9n-download-btn {
            display: inline-block;
            background-color: white;
            color: #667eea;
            padding: 15px 35px;
            border-radius: 25px;
            text-decoration: none;
            font-weight: 600;
            font-size: 16px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        }

        .sw9d9n-download-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        }

        .sw9d9n-benefits {
            background: white;
            padding: 80px 20px;
        }

        .sw9d9n-benefits-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 25px;
            margin-top: 50px;
        }

        .sw9d9n-benefit-item {
            padding: 25px;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            border-radius: 10px;
            display: flex;
            gap: 15px;
            align-items: flex-start;
        }

        .sw9d9n-benefit-number {
            font-size: 28px;
            font-weight: 700;
            color: #4285f4;
            flex-shrink: 0;
        }

        .sw9d9n-benefit-content h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
            color: #1f2937;
        }

        .sw9d9n-benefit-content p {
            font-size: 14px;
            color: #666;
            line-height: 1.5;
        }

        .sw9d9n-footer {
            background-color: #1f2937;
            color: white;
            padding: 60px 20px 20px;
        }

        .sw9d9n-footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .sw9d9n-footer-section h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .sw9d9n-footer-link {
            display: block;
            color: #d1d5db;
            text-decoration: none;
            font-size: 14px;
            margin-bottom: 12px;
            transition: color 0.3s ease;
        }

        .sw9d9n-footer-link:hover {
            color: white;
        }

        .sw9d9n-footer-bottom {
            border-top: 1px solid #374151;
            padding-top: 30px;
            text-align: center;
            color: #9ca3af;
            font-size: 14px;
        }

        .sw9d9n-security-badge {
            display: flex;
            justify-content: center;
            gap: 30px;
            margin-top: 40px;
            flex-wrap: wrap;
        }

        .sw9d9n-badge {
            background: white;
            padding: 15px 25px;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            font-size: 13px;
            color: #666;
            text-align: center;
        }

        .sw9d9n-badge strong {
            display: block;
            color: #1f2937;
            font-size: 14px;
            margin-bottom: 5px;
        }

        @media (max-width: 768px) {
            .sw9d9n-hero-title {
                font-size: 32px;
            }

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

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

            .sw9d9n-nav-menu {
                gap: 15px;
                font-size: 13px;
            }

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

            .sw9d9n-download-btn {
                width: 100%;
                max-width: 300px;
            }

            .sw9d9n-cta-button {
                display: block;
                margin: 10px auto;
            }
        }

        @media (max-width: 600px) {
            .sw9d9n-navbar {
                flex-direction: column;
                gap: 15px;
                height: auto;
                padding: 15px 20px;
            }

            .sw9d9n-nav-menu {
                flex-direction: column;
                gap: 10px;
                width: 100%;
                text-align: center;
            }

            .sw9d9n-nav-link {
                display: block;
                padding: 10px 0;
            }

            .sw9d9n-section {
                padding: 50px 15px;
            }

            .sw9d9n-hero {
                padding: 50px 15px;
            }

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

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