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

        body {
            font-family: 'Microsoft YaHei', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        }

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

        .yzde-header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
        }

        .yzde-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }

        .yzde-logo {
            height: 40px;
        }

        .yzde-nav-menu {
            display: flex;
            gap: 30px;
        }

        .yzde-nav-link {
            text-decoration: none;
            color: #333;
            font-weight: 500;
            transition: color 0.3s ease;
            position: relative;
        }

        .yzde-nav-link:hover {
            color: #667eea;
        }

        .yzde-nav-link::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: #667eea;
            transition: width 0.3s ease;
        }

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

        .yzde-main {
            margin-top: 80px;
            padding: 60px 0;
        }

        .yzde-hero {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            padding: 60px 40px;
            text-align: center;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
            margin-bottom: 40px;
        }

        .yzde-title {
            font-size: 3.5rem;
            font-weight: 700;
            color: #2c3e50;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #667eea, #764ba2);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .yzde-subtitle {
            font-size: 1.3rem;
            color: #666;
            margin-bottom: 40px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .yzde-download-section {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            padding: 40px;
            margin-bottom: 40px;
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
        }

        .yzde-download-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-bottom: 40px;
        }

        .yzde-download-card {
            background: #f8f9fa;
            border-radius: 15px;
            padding: 30px;
            text-align: center;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: 2px solid transparent;
        }

        .yzde-download-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
            border-color: #667eea;
        }

        .yzde-platform-icon {
            font-size: 3rem;
            margin-bottom: 20px;
            color: #667eea;
        }

        .yzde-platform-name {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 15px;
            color: #2c3e50;
        }

        .yzde-version-info {
            color: #666;
            margin-bottom: 20px;
            line-height: 1.8;
        }

        .yzde-download-btn {
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: white;
            padding: 15px 30px;
            border: none;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
        }

        .yzde-download-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(102, 126, 234, 0.6);
        }

        .yzde-features-section {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            padding: 40px;
            margin-bottom: 40px;
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
        }

        .yzde-section-title {
            font-size: 2.5rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 40px;
            color: #2c3e50;
        }

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

        .yzde-feature-card {
            text-align: center;
            padding: 30px 20px;
            border-radius: 15px;
            background: #f8f9fa;
            transition: transform 0.3s ease;
        }

        .yzde-feature-card:hover {
            transform: translateY(-5px);
        }

        .yzde-feature-icon {
            font-size: 3rem;
            color: #667eea;
            margin-bottom: 20px;
        }

        .yzde-feature-title {
            font-size: 1.3rem;
            font-weight: 600;
            margin-bottom: 15px;
            color: #2c3e50;
        }

        .yzde-feature-desc {
            color: #666;
            line-height: 1.6;
        }

        .yzde-system-requirements {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            padding: 40px;
            margin-bottom: 40px;
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
        }

        .yzde-requirements-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .yzde-requirement-item {
            background: #f8f9fa;
            padding: 25px;
            border-radius: 15px;
            border-left: 4px solid #667eea;
        }

        .yzde-requirement-title {
            font-weight: 600;
            color: #2c3e50;
            margin-bottom: 10px;
        }

        .yzde-requirement-text {
            color: #666;
        }

        .yzde-cta-section {
            background: linear-gradient(135deg, #667eea, #764ba2);
            border-radius: 20px;
            padding: 60px 40px;
            text-align: center;
            color: white;
            margin-bottom: 40px;
        }

        .yzde-cta-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .yzde-cta-desc {
            font-size: 1.2rem;
            margin-bottom: 30px;
            opacity: 0.9;
        }

        .yzde-cta-btn {
            background: white;
            color: #667eea;
            padding: 20px 40px;
            border: none;
            border-radius: 50px;
            font-size: 1.2rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
        }

        .yzde-cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        }

        .yzde-footer {
            background: rgba(255, 255, 255, 0.95);
            padding: 40px 0;
            text-align: center;
            color: #666;
            border-radius: 20px 20px 0 0;
        }

        .yzde-footer-content {
            max-width: 800px;
            margin: 0 auto;
        }

        .yzde-footer-links {
            display: flex;
            justify-content: center;
            gap: 30px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .yzde-footer-link {
            color: #666;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .yzde-footer-link:hover {
            color: #667eea;
        }

        .yzde-copyright {
            font-size: 0.9rem;
            opacity: 0.8;
        }

        @media (max-width: 768px) {
            .yzde-nav-menu {
                display: none;
            }

            .yzde-title {
                font-size: 2.5rem;
            }

            .yzde-hero {
                padding: 40px 20px;
            }

            .yzde-download-section,
            .yzde-features-section,
            .yzde-system-requirements,
            .yzde-cta-section {
                padding: 30px 20px;
            }

            .yzde-download-grid,
            .yzde-features-grid,
            .yzde-requirements-grid {
                grid-template-columns: 1fr;
            }
        }