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

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

        /* 导航栏样式 */
        .bh040-navbar {
            background: linear-gradient(135deg, #0088cc 0%, #006ba3 100%);
            padding: 0 20px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .bh040-nav-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .bh040-logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .bh040-logo img {
            height: 45px;
            width: auto;
        }

        .bh040-logo-text {
            color: white;
            font-size: 20px;
            font-weight: 600;
        }

        .bh040-nav-menu {
            display: flex;
            gap: 30px;
            align-items: center;
        }

        .bh040-nav-link {
            color: white;
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: opacity 0.3s ease;
        }

        .bh040-nav-link:hover {
            opacity: 0.8;
        }

        /* 主容器 */
        .bh040-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 顶部英雄区域 */
        .bh040-hero {
            background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
            padding: 60px 20px;
            margin-top: 0;
        }

        .bh040-hero-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .bh040-hero-text h1 {
            font-size: 42px;
            line-height: 1.3;
            margin-bottom: 20px;
            color: #0088cc;
        }

        .bh040-hero-text p {
            font-size: 16px;
            color: #666;
            margin-bottom: 15px;
        }

        .bh040-hero-feature-list {
            list-style: none;
            margin-bottom: 30px;
        }

        .bh040-hero-feature-list li {
            padding: 8px 0;
            color: #555;
            font-size: 15px;
        }

        .bh040-hero-feature-list li:before {
            content: "✓ ";
            color: #0088cc;
            font-weight: bold;
            margin-right: 10px;
        }

        .bh040-hero-image {
            text-align: center;
        }

        .bh040-hero-image img {
            max-width: 100%;
            height: auto;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 136, 204, 0.15);
        }

        /* 下载按钮区域 */
        .bh040-download-section {
            padding: 80px 20px;
            background: white;
        }

        .bh040-download-wrapper {
            max-width: 1200px;
            margin: 0 auto;
        }

        .bh040-section-title {
            font-size: 36px;
            font-weight: 700;
            text-align: center;
            margin-bottom: 50px;
            color: #1a1a1a;
        }

        .bh040-section-title .bh040-highlight {
            color: #0088cc;
        }

        .bh040-download-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-bottom: 50px;
        }

        .bh040-download-card {
            background: #f8f9fa;
            border: 2px solid #e8ecf1;
            border-radius: 12px;
            padding: 30px;
            text-align: center;
            transition: all 0.3s ease;
        }

        .bh040-download-card:hover {
            border-color: #0088cc;
            box-shadow: 0 8px 24px rgba(0, 136, 204, 0.12);
            transform: translateY(-5px);
        }

        .bh040-platform-icon {
            font-size: 48px;
            margin-bottom: 15px;
        }

        .bh040-platform-name {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            color: #333;
        }

        .bh040-platform-version {
            font-size: 13px;
            color: #999;
            margin-bottom: 20px;
        }

        .bh040-btn-primary {
            display: inline-block;
            background: linear-gradient(135deg, #0088cc 0%, #006ba3 100%);
            color: white;
            padding: 12px 32px;
            border-radius: 6px;
            text-decoration: none;
            font-weight: 600;
            font-size: 15px;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
        }

        .bh040-btn-primary:hover {
            transform: scale(1.05);
            box-shadow: 0 6px 20px rgba(0, 136, 204, 0.4);
        }

        /* 信息卡片区域 */
        .bh040-info-section {
            background: #f8f9fa;
            padding: 60px 20px;
        }

        .bh040-info-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .bh040-info-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }

        .bh040-info-card {
            background: white;
            padding: 25px;
            border-radius: 10px;
            border-left: 4px solid #0088cc;
        }

        .bh040-info-card h3 {
            font-size: 18px;
            margin-bottom: 12px;
            color: #333;
        }

        .bh040-info-card p {
            font-size: 14px;
            color: #666;
            line-height: 1.7;
        }

        /* 功能特性区域 */
        .bh040-features-section {
            padding: 80px 20px;
            background: white;
        }

        .bh040-features-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .bh040-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 40px;
            margin-top: 50px;
        }

        .bh040-feature-item {
            text-align: center;
        }

        .bh040-feature-icon {
            font-size: 52px;
            margin-bottom: 20px;
        }

        .bh040-feature-item h4 {
            font-size: 18px;
            margin-bottom: 12px;
            color: #333;
        }

        .bh040-feature-item p {
            font-size: 14px;
            color: #666;
            line-height: 1.7;
        }

        /* 系统要求区域 */
        .bh040-requirements-section {
            padding: 60px 20px;
            background: #f8f9fa;
        }

        .bh040-requirements-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .bh040-requirements-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }

        .bh040-requirement-item {
            background: white;
            padding: 20px;
            border-radius: 8px;
            border-top: 3px solid #0088cc;
        }

        .bh040-requirement-label {
            font-size: 13px;
            color: #999;
            text-transform: uppercase;
            margin-bottom: 8px;
        }

        .bh040-requirement-value {
            font-size: 16px;
            font-weight: 600;
            color: #333;
        }

        /* CTA区域 */
        .bh040-cta-section {
            background: linear-gradient(135deg, #0088cc 0%, #006ba3 100%);
            padding: 80px 20px;
            text-align: center;
            color: white;
        }

        .bh040-cta-container {
            max-width: 800px;
            margin: 0 auto;
        }

        .bh040-cta-title {
            font-size: 38px;
            margin-bottom: 20px;
            font-weight: 700;
        }

        .bh040-cta-text {
            font-size: 18px;
            margin-bottom: 40px;
            opacity: 0.95;
        }

        .bh040-btn-cta {
            display: inline-block;
            background: white;
            color: #0088cc;
            padding: 15px 50px;
            border-radius: 6px;
            text-decoration: none;
            font-weight: 700;
            font-size: 16px;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
        }

        .bh040-btn-cta:hover {
            transform: scale(1.05);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
        }

        /* 页脚 */
        .bh040-footer {
            background: #1a1a1a;
            color: #999;
            padding: 40px 20px;
            font-size: 14px;
        }

        .bh040-footer-container {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }

        .bh040-footer-section h5 {
            color: white;
            margin-bottom: 15px;
            font-size: 15px;
        }

        .bh040-footer-link {
            color: #999;
            text-decoration: none;
            display: block;
            margin-bottom: 10px;
            transition: color 0.3s ease;
        }

        .bh040-footer-link:hover {
            color: #0088cc;
        }

        .bh040-footer-bottom {
            border-top: 1px solid #333;
            padding-top: 30px;
            text-align: center;
        }

        .bh040-footer-copyright {
            margin-bottom: 10px;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .bh040-nav-menu {
                gap: 15px;
            }

            .bh040-nav-link {
                font-size: 12px;
            }

            .bh040-hero-content {
                grid-template-columns: 1fr;
                gap: 30px;
            }

            .bh040-hero-text h1 {
                font-size: 28px;
            }

            .bh040-section-title {
                font-size: 28px;
            }

            .bh040-cta-title {
                font-size: 28px;
            }

            .bh040-download-grid {
                grid-template-columns: 1fr;
            }

            .bh040-features-grid {
                grid-template-columns: 1fr;
                gap: 25px;
            }

            .bh040-requirements-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 480px) {
            .bh040-nav-container {
                height: 60px;
            }

            .bh040-logo-text {
                font-size: 16px;
            }

            .bh040-nav-menu {
                display: none;
            }

            .bh040-hero {
                padding: 40px 20px;
            }

            .bh040-hero-text h1 {
                font-size: 22px;
            }

            .bh040-hero-text p {
                font-size: 14px;
            }

            .bh040-section-title {
                font-size: 22px;
                margin-bottom: 30px;
            }

            .bh040-cta-title {
                font-size: 22px;
            }

            .bh040-cta-text {
                font-size: 15px;
            }

            .bh040-btn-primary, .bh040-btn-cta {
                padding: 12px 25px;
                font-size: 14px;
            }

            .bh040-requirements-grid {
                grid-template-columns: 1fr;
            }

            .bh040-download-section,
            .bh040-features-section,
            .bh040-info-section,
            .bh040-requirements-section,
            .bh040-cta-section {
                padding: 40px 20px;
            }
        }