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

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f9f9f9;
        }

        /* 导航栏样式 */
        .vjh3-navbar-wrapper {
            background: linear-gradient(135deg, #0084ff 0%, #0073e6 100%);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 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;
            gap: 12px;
        }

        .vjh3-logo-img {
            height: 40px;
            width: auto;
        }

        .vjh3-brand-text {
            font-size: 20px;
            font-weight: bold;
            color: white;
            text-decoration: none;
        }

        .vjh3-nav-menu {
            display: flex;
            gap: 30px;
            list-style: none;
        }

        .vjh3-nav-link {
            color: white;
            text-decoration: none;
            font-size: 15px;
            transition: all 0.3s ease;
            position: relative;
        }

        .vjh3-nav-link:hover {
            opacity: 0.8;
        }

        .vjh3-nav-link::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: white;
            transition: width 0.3s ease;
        }

        .vjh3-nav-link:hover::after {
            width: 100%;
        }

        /* 响应式导航 */
        @media (max-width: 768px) {
            .vjh3-nav-menu {
                gap: 15px;
            }

            .vjh3-nav-link {
                font-size: 13px;
            }

            .vjh3-navbar-container {
                height: 60px;
            }

            .vjh3-logo-img {
                height: 35px;
            }

            .vjh3-brand-text {
                font-size: 18px;
            }
        }

        /* 主内容区 */
        .vjh3-main-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }

        /* 英雄区 */
        .vjh3-hero-section {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            border-radius: 12px;
            padding: 60px 40px;
            margin: 40px 0;
            text-align: center;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
        }

        .vjh3-hero-title {
            font-size: 42px;
            font-weight: bold;
            color: #1a1a1a;
            margin-bottom: 20px;
            line-height: 1.3;
        }

        .vjh3-hero-subtitle {
            font-size: 18px;
            color: #555;
            margin-bottom: 30px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .vjh3-cta-button-group {
            display: flex;
            gap: 15px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .vjh3-cta-btn-primary {
            background: linear-gradient(135deg, #0084ff 0%, #0073e6 100%);
            color: white;
            padding: 14px 40px;
            border: none;
            border-radius: 6px;
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(0, 132, 255, 0.3);
            text-decoration: none;
            display: inline-block;
        }

        .vjh3-cta-btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 132, 255, 0.4);
        }

        .vjh3-cta-btn-secondary {
            background: white;
            color: #0084ff;
            padding: 14px 40px;
            border: 2px solid #0084ff;
            border-radius: 6px;
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .vjh3-cta-btn-secondary:hover {
            background: #f0f5ff;
            transform: translateY(-2px);
        }

        /* 功能特点区 */
        .vjh3-features-section {
            margin: 60px 0;
        }

        .vjh3-section-title {
            font-size: 32px;
            font-weight: bold;
            color: #1a1a1a;
            margin-bottom: 40px;
            text-align: center;
        }

        .vjh3-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-bottom: 50px;
        }

        .vjh3-feature-card {
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            border-top: 4px solid #0084ff;
        }

        .vjh3-feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
        }

        .vjh3-feature-icon {
            font-size: 40px;
            margin-bottom: 15px;
            display: inline-block;
        }

        .vjh3-feature-title {
            font-size: 20px;
            font-weight: bold;
            color: #1a1a1a;
            margin-bottom: 12px;
        }

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

        /* 安装说明区 */
        .vjh3-installation-section {
            background: white;
            padding: 50px 40px;
            border-radius: 12px;
            margin: 60px 0;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
        }

        .vjh3-steps-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-top: 40px;
        }

        .vjh3-step-item {
            position: relative;
        }

        .vjh3-step-number {
            background: #0084ff;
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: bold;
            margin-bottom: 20px;
        }

        .vjh3-step-title {
            font-size: 18px;
            font-weight: bold;
            color: #1a1a1a;
            margin-bottom: 10px;
        }

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

        /* 系统兼容性区 */
        .vjh3-compatibility-section {
            margin: 60px 0;
        }

        .vjh3-compatibility-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 25px;
            margin-top: 35px;
        }

        .vjh3-compatibility-card {
            background: white;
            padding: 25px;
            border-radius: 10px;
            text-align: center;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
        }

        .vjh3-compatibility-card:hover {
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
            transform: translateY(-3px);
        }

        .vjh3-os-icon {
            font-size: 50px;
            margin-bottom: 15px;
        }

        .vjh3-os-name {
            font-size: 18px;
            font-weight: bold;
            color: #1a1a1a;
            margin-bottom: 10px;
        }

        .vjh3-os-version {
            font-size: 13px;
            color: #888;
            margin-bottom: 15px;
        }

        .vjh3-download-link {
            color: #0084ff;
            text-decoration: none;
            font-weight: bold;
            font-size: 14px;
            transition: all 0.3s ease;
        }

        .vjh3-download-link:hover {
            color: #0073e6;
            text-decoration: underline;
        }

        /* 常见问题区 */
        .vjh3-faq-section {
            background: white;
            padding: 50px 40px;
            border-radius: 12px;
            margin: 60px 0;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
        }

        .vjh3-faq-list {
            margin-top: 35px;
        }

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

        .vjh3-faq-item:last-child {
            border-bottom: none;
        }

        .vjh3-faq-question {
            font-size: 16px;
            font-weight: bold;
            color: #1a1a1a;
            margin-bottom: 10px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .vjh3-faq-question:hover {
            color: #0084ff;
        }

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

        /* CTA 区域 */
        .vjh3-cta-section {
            background: linear-gradient(135deg, #0084ff 0%, #0073e6 100%);
            color: white;
            padding: 60px 40px;
            border-radius: 12px;
            text-align: center;
            margin: 60px 0;
            box-shadow: 0 4px 20px rgba(0, 132, 255, 0.3);
        }

        .vjh3-cta-section-title {
            font-size: 36px;
            font-weight: bold;
            margin-bottom: 20px;
        }

        .vjh3-cta-section-desc {
            font-size: 18px;
            margin-bottom: 30px;
            opacity: 0.95;
        }

        .vjh3-cta-btn-white {
            background: white;
            color: #0084ff;
            padding: 14px 45px;
            border: none;
            border-radius: 6px;
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .vjh3-cta-btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 255, 255, 0.3);
        }

        /* 页脚 */
        .vjh3-footer {
            background: #1a1a1a;
            color: #ccc;
            padding: 50px 40px 30px;
            margin-top: 80px;
        }

        .vjh3-footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

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

        .vjh3-footer-link {
            color: #ccc;
            text-decoration: none;
            font-size: 14px;
            line-height: 2;
            transition: all 0.3s ease;
        }

        .vjh3-footer-link:hover {
            color: #0084ff;
        }

        .vjh3-footer-bottom {
            max-width: 1200px;
            margin: 0 auto;
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #333;
            font-size: 13px;
            color: #888;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .vjh3-hero-title {
                font-size: 28px;
            }

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

            .vjh3-hero-section {
                padding: 40px 20px;
            }

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

            .vjh3-installation-section,
            .vjh3-faq-section {
                padding: 30px 20px;
            }

            .vjh3-cta-section {
                padding: 40px 20px;
            }

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

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

            .vjh3-footer {
                padding: 30px 20px 20px;
            }

            .vjh3-cta-button-group {
                flex-direction: column;
                align-items: center;
            }

            .vjh3-cta-btn-primary,
            .vjh3-cta-btn-secondary {
                width: 100%;
                max-width: 300px;
            }
        }

        @media (max-width: 480px) {
            .vjh3-hero-title {
                font-size: 22px;
            }

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

            .vjh3-section-title {
                font-size: 20px;
            }

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

            .vjh3-feature-title {
                font-size: 18px;
            }

            .vjh3-step-title {
                font-size: 16px;
            }
        }