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

        body {
            font-family: 'Microsoft YaHei', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }

        .jav6db-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .jav6db-header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .jav6db-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }

        .jav6db-logo img {
            height: 40px;
            width: auto;
        }

        .jav6db-nav-menu {
            display: flex;
            gap: 30px;
            align-items: center;
        }

        .jav6db-nav-link {
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            padding: 8px 16px;
            border-radius: 20px;
        }

        .jav6db-nav-link:hover {
            background-color: rgba(255,255,255,0.2);
            transform: translateY(-2px);
        }

        .jav6db-hero {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 80px 0;
            text-align: center;
        }

        .jav6db-hero-title {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 20px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }

        .jav6db-hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 40px;
            opacity: 0.9;
        }

        .jav6db-download-btn {
            display: inline-block;
            background: linear-gradient(45deg, #ff6b6b, #ee5a24);
            color: white;
            padding: 18px 40px;
            text-decoration: none;
            border-radius: 50px;
            font-size: 1.2rem;
            font-weight: 600;
            transition: all 0.3s ease;
            box-shadow: 0 8px 25px rgba(238, 90, 36, 0.3);
        }

        .jav6db-download-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 35px rgba(238, 90, 36, 0.4);
        }

        .jav6db-main-content {
            padding: 80px 0;
            background: white;
        }

        .jav6db-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 40px;
            margin-bottom: 60px;
        }

        .jav6db-feature-card {
            background: white;
            padding: 40px 30px;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            text-align: center;
            transition: all 0.3s ease;
            border: 1px solid #e9ecef;
        }

        .jav6db-feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.15);
        }

        .jav6db-feature-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, #667eea, #764ba2);
            border-radius: 50%;
            margin: 0 auto 25px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            color: white;
        }

        .jav6db-feature-title {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 15px;
            color: #2c3e50;
        }

        .jav6db-feature-desc {
            color: #6c757d;
            line-height: 1.8;
        }

        .jav6db-system-requirements {
            background: #f8f9fa;
            padding: 60px 0;
        }

        .jav6db-section-title {
            font-size: 2.5rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 50px;
            color: #2c3e50;
        }

        .jav6db-requirements-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }

        .jav6db-requirement-item {
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }

        .jav6db-requirement-label {
            font-weight: 600;
            color: #495057;
            margin-bottom: 10px;
        }

        .jav6db-requirement-value {
            color: #6c757d;
        }

        .jav6db-installation-guide {
            padding: 80px 0;
            background: white;
        }

        .jav6db-steps-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 40px;
        }

        .jav6db-step-card {
            position: relative;
            padding: 40px 30px;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            border-radius: 15px;
            border-left: 5px solid #667eea;
        }

        .jav6db-step-number {
            position: absolute;
            top: -15px;
            left: 30px;
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: white;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
        }

        .jav6db-step-title {
            font-size: 1.3rem;
            font-weight: 600;
            margin-bottom: 15px;
            color: #2c3e50;
            margin-top: 10px;
        }

        .jav6db-step-desc {
            color: #6c757d;
            line-height: 1.7;
        }

        .jav6db-cta-section {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            padding: 80px 0;
            text-align: center;
            color: white;
        }

        .jav6db-cta-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .jav6db-cta-desc {
            font-size: 1.2rem;
            margin-bottom: 40px;
            opacity: 0.9;
        }

        .jav6db-footer {
            background: #2c3e50;
            color: white;
            padding: 50px 0 30px;
        }

        .jav6db-footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 30px;
        }

        .jav6db-footer-section h3 {
            margin-bottom: 20px;
            color: #ecf0f1;
        }

        .jav6db-footer-section p,
        .jav6db-footer-section a {
            color: #bdc3c7;
            text-decoration: none;
            line-height: 1.8;
        }

        .jav6db-footer-section a:hover {
            color: #ecf0f1;
        }

        .jav6db-footer-bottom {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #34495e;
            color: #95a5a6;
        }

        @media (max-width: 768px) {
            .jav6db-nav-menu {
                flex-direction: column;
                gap: 15px;
            }

            .jav6db-hero-title {
                font-size: 2.5rem;
            }

            .jav6db-hero-subtitle {
                font-size: 1.1rem;
            }

            .jav6db-section-title {
                font-size: 2rem;
            }

            .jav6db-cta-title {
                font-size: 2rem;
            }
        }