* {
            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;
        }

        /* 导航栏样式 */
        .vjh3-navbar-wrapper {
            background: linear-gradient(135deg, #0088cc 0%, #00a8e8 100%);
            box-shadow: 0 2px 10px rgba(0, 136, 204, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .vjh3-navbar-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

        .vjh3-logo-section {
            display: flex;
            align-items: center;
            text-decoration: none;
            color: white;
            font-weight: 600;
            font-size: 20px;
        }

        .vjh3-logo-section img {
            height: 40px;
            margin-right: 12px;
        }

        .vjh3-nav-menu {
            display: flex;
            gap: 30px;
            align-items: center;
        }

        .vjh3-nav-link {
            color: white;
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s ease;
            padding: 8px 12px;
            border-radius: 4px;
        }

        .vjh3-nav-link:hover {
            background-color: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }

        /* 主内容区 */
        .vjh3-hero-section {
            background: linear-gradient(135deg, #0088cc 0%, #00a8e8 100%);
            color: white;
            padding: 80px 20px;
            text-align: center;
        }

        .vjh3-hero-content {
            max-width: 800px;
            margin: 0 auto;
        }

        .vjh3-hero-title {
            font-size: 48px;
            font-weight: 700;
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .vjh3-hero-subtitle {
            font-size: 20px;
            margin-bottom: 40px;
            opacity: 0.95;
            line-height: 1.5;
        }

        .vjh3-cta-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }

        .vjh3-btn-primary {
            background: white;
            color: #0088cc;
            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 15px rgba(0, 0, 0, 0.2);
            text-decoration: none;
            display: inline-block;
        }

        .vjh3-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        }

        .vjh3-btn-secondary {
            background: transparent;
            color: white;
            padding: 16px 40px;
            font-size: 16px;
            font-weight: 600;
            border: 2px solid white;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .vjh3-btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }

        .vjh3-hero-features {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 40px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
        }

        .vjh3-feature-badge {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
        }

        .vjh3-feature-icon {
            width: 24px;
            height: 24px;
            background: rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
        }

        /* 下载区域 */
        .vjh3-download-section {
            max-width: 1200px;
            margin: -60px auto 60px;
            padding: 40px;
            background: white;
            border-radius: 12px;
            box-shadow: 0 10px 40px rgba(0, 136, 204, 0.15);
            position: relative;
            z-index: 10;
        }

        .vjh3-download-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 30px;
            text-align: center;
            color: #0088cc;
        }

        .vjh3-download-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin-bottom: 30px;
        }

        .vjh3-download-card {
            border: 2px solid #e0e0e0;
            border-radius: 12px;
            padding: 30px;
            text-align: center;
            transition: all 0.3s ease;
            background: #f9f9f9;
        }

        .vjh3-download-card:hover {
            border-color: #0088cc;
            box-shadow: 0 8px 25px rgba(0, 136, 204, 0.1);
            transform: translateY(-5px);
        }

        .vjh3-platform-icon {
            font-size: 48px;
            margin-bottom: 15px;
        }

        .vjh3-platform-name {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 12px;
            color: #333;
        }

        .vjh3-version-info {
            font-size: 13px;
            color: #666;
            margin-bottom: 8px;
        }

        .vjh3-file-size {
            font-size: 13px;
            color: #999;
            margin-bottom: 20px;
        }

        .vjh3-btn-download {
            background: linear-gradient(135deg, #0088cc 0%, #00a8e8 100%);
            color: white;
            padding: 12px 24px;
            border: none;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            width: 100%;
        }

        .vjh3-btn-download:hover {
            transform: scale(1.05);
            box-shadow: 0 4px 15px rgba(0, 136, 204, 0.3);
        }

        /* 系统要求 */
        .vjh3-requirements-section {
            background: white;
            padding: 60px 20px;
            margin-bottom: 40px;
        }

        .vjh3-requirements-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .vjh3-section-title {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 40px;
            text-align: center;
            color: #333;
        }

        .vjh3-requirements-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .vjh3-requirement-card {
            border-left: 4px solid #0088cc;
            padding: 25px;
            background: #f0f8ff;
            border-radius: 8px;
        }

        .vjh3-requirement-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 15px;
            color: #0088cc;
        }

        .vjh3-requirement-item {
            font-size: 14px;
            color: #666;
            margin-bottom: 10px;
            padding-left: 20px;
            position: relative;
        }

        .vjh3-requirement-item:before {
            content: "✓";
            position: absolute;
            left: 0;
            color: #0088cc;
            font-weight: bold;
        }

        /* 功能介绍 */
        .vjh3-features-section {
            background: linear-gradient(135deg, #f0f8ff 0%, #e6f2ff 100%);
            padding: 60px 20px;
            margin-bottom: 40px;
        }

        .vjh3-features-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .vjh3-features-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .vjh3-feature-item {
            background: white;
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0, 136, 204, 0.1);
            transition: all 0.3s ease;
        }

        .vjh3-feature-item:hover {
            transform: translateY(-8px);
            box-shadow: 0 8px 30px rgba(0, 136, 204, 0.2);
        }

        .vjh3-feature-number {
            font-size: 32px;
            font-weight: 700;
            color: #0088cc;
            margin-bottom: 10px;
        }

        .vjh3-feature-name {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 12px;
            color: #333;
        }

        .vjh3-feature-desc {
            font-size: 14px;
            color: #666;
            line-height: 1.6;
        }

        /* 常见问题 */
        .vjh3-faq-section {
            background: white;
            padding: 60px 20px;
            margin-bottom: 40px;
        }

        .vjh3-faq-container {
            max-width: 800px;
            margin: 0 auto;
        }

        .vjh3-faq-item {
            margin-bottom: 20px;
            border-bottom: 1px solid #e0e0e0;
            padding-bottom: 20px;
        }

        .vjh3-faq-question {
            font-size: 16px;
            font-weight: 600;
            color: #0088cc;
            margin-bottom: 10px;
            cursor: pointer;
        }

        .vjh3-faq-answer {
            font-size: 14px;
            color: #666;
            line-height: 1.8;
        }

        /* 页脚 */
        .vjh3-footer-wrapper {
            background: #1a1a1a;
            color: #999;
            padding: 50px 20px 30px;
        }

        .vjh3-footer-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .vjh3-footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .vjh3-footer-section {
            font-size: 14px;
        }

        .vjh3-footer-title {
            color: white;
            font-weight: 600;
            margin-bottom: 15px;
            font-size: 16px;
        }

        .vjh3-footer-link {
            color: #999;
            text-decoration: none;
            display: block;
            margin-bottom: 10px;
            transition: color 0.3s ease;
        }

        .vjh3-footer-link:hover {
            color: #0088cc;
        }

        .vjh3-footer-bottom {
            border-top: 1px solid #333;
            padding-top: 30px;
            text-align: center;
            font-size: 13px;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .vjh3-hero-title {
                font-size: 36px;
            }

            .vjh3-hero-subtitle {
                font-size: 16px;
            }

            .vjh3-nav-menu {
                gap: 15px;
            }

            .vjh3-nav-link {
                font-size: 12px;
                padding: 6px 8px;
            }

            .vjh3-cta-buttons {
                flex-direction: column;
            }

            .vjh3-btn-primary,
            .vjh3-btn-secondary {
                width: 100%;
            }

            .vjh3-hero-features {
                gap: 20px;
            }

            .vjh3-download-section {
                margin-left: 0;
                margin-right: 0;
                border-radius: 0;
            }

            .vjh3-download-title {
                font-size: 24px;
            }

            .vjh3-section-title {
                font-size: 22px;
            }
        }

        @media (max-width: 480px) {
            .vjh3-navbar-container {
                padding: 0 15px;
                height: 60px;
            }

            .vjh3-logo-section {
                font-size: 16px;
            }

            .vjh3-logo-section img {
                height: 30px;
                margin-right: 8px;
            }

            .vjh3-nav-menu {
                gap: 10px;
            }

            .vjh3-hero-section {
                padding: 50px 15px;
            }

            .vjh3-hero-title {
                font-size: 28px;
            }

            .vjh3-hero-subtitle {
                font-size: 14px;
            }

            .vjh3-download-section {
                padding: 25px 15px;
                margin: -40px 0 40px;
            }

            .vjh3-download-grid {
                gap: 15px;
            }

            .vjh3-download-card {
                padding: 20px;
            }
        }