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

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

        /* 导航栏 */
        .bh040-navbar {
            background: linear-gradient(135deg, #0088cc 0%, #00a8e8 100%);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        }

        .bh040-navbar-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .bh040-logo-section {
            display: flex;
            align-items: center;
            gap: 1rem;
            text-decoration: none;
            color: white;
            font-weight: bold;
            font-size: 1.3rem;
        }

        .bh040-logo-section img {
            height: 40px;
            width: auto;
        }

        .bh040-nav-menu {
            display: flex;
            gap: 2rem;
            list-style: none;
        }

        .bh040-nav-link {
            color: white;
            text-decoration: none;
            font-size: 0.95rem;
            font-weight: 500;
            transition: all 0.3s ease;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
        }

        .bh040-nav-link:hover {
            background-color: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }

        /* 主容器 */
        .bh040-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        /* 英雄区域 */
        .bh040-hero {
            background: linear-gradient(135deg, #f5f7fa 0%, #e9f0f7 100%);
            padding: 4rem 0;
            margin-top: 2rem;
            border-radius: 12px;
            overflow: hidden;
        }

        .bh040-hero-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }

        .bh040-hero-text h1 {
            font-size: 2.8rem;
            color: #0088cc;
            margin-bottom: 1rem;
            line-height: 1.2;
            font-weight: 700;
        }

        .bh040-hero-text p {
            font-size: 1.1rem;
            color: #555;
            margin-bottom: 1.5rem;
            line-height: 1.8;
        }

        .bh040-hero-text .bh040-highlight {
            color: #0088cc;
            font-weight: 600;
        }

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

        .bh040-hero-image img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            box-shadow: 0 8px 24px rgba(0, 136, 204, 0.15);
        }

        /* CTA按钮区域 */
        .bh040-cta-section {
            background: white;
            padding: 3rem 0;
            margin: 3rem 0;
        }

        .bh040-cta-title {
            text-align: center;
            font-size: 2rem;
            color: #0088cc;
            margin-bottom: 2rem;
            font-weight: 700;
        }

        .bh040-download-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 3rem;
        }

        .bh040-download-card {
            background: linear-gradient(135deg, #ffffff 0%, #f9fbfd 100%);
            border: 2px solid #e0e8f0;
            border-radius: 12px;
            padding: 2rem;
            text-align: center;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
        }

        .bh040-download-card:hover {
            border-color: #0088cc;
            box-shadow: 0 8px 24px rgba(0, 136, 204, 0.2);
            transform: translateY(-5px);
        }

        .bh040-platform-icon {
            font-size: 3rem;
            margin-bottom: 1rem;
        }

        .bh040-platform-name {
            font-size: 1.3rem;
            font-weight: 600;
            color: #333;
            margin-bottom: 0.5rem;
        }

        .bh040-platform-version {
            color: #888;
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }

        .bh040-file-size {
            background: #f0f5fa;
            padding: 0.8rem;
            border-radius: 6px;
            color: #666;
            font-size: 0.85rem;
            margin-bottom: 1.5rem;
        }

        .bh040-download-btn {
            display: inline-block;
            background: linear-gradient(135deg, #0088cc 0%, #00a8e8 100%);
            color: white;
            padding: 1rem 2.5rem;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 12px rgba(0, 136, 204, 0.3);
        }

        .bh040-download-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 136, 204, 0.4);
            background: linear-gradient(135deg, #006fa3 0%, #0088cc 100%);
        }

        /* 系统要求 */
        .bh040-requirements {
            background: #f9fbfd;
            padding: 3rem 0;
            margin: 3rem 0;
        }

        .bh040-section-title {
            font-size: 1.8rem;
            color: #0088cc;
            margin-bottom: 2rem;
            font-weight: 700;
            text-align: center;
        }

        .bh040-requirements-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin-top: 2rem;
        }

        .bh040-req-item {
            background: white;
            padding: 1.5rem;
            border-radius: 8px;
            border-left: 4px solid #0088cc;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
        }

        .bh040-req-label {
            font-weight: 600;
            color: #0088cc;
            margin-bottom: 0.5rem;
            font-size: 0.95rem;
        }

        .bh040-req-value {
            color: #666;
            font-size: 0.9rem;
        }

        /* 功能特性 */
        .bh040-features {
            padding: 3rem 0;
            margin: 3rem 0;
        }

        .bh040-features-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
            margin-top: 2rem;
        }

        .bh040-feature-item {
            display: flex;
            gap: 1.5rem;
        }

        .bh040-feature-icon {
            flex-shrink: 0;
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, #0088cc 0%, #00a8e8 100%);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.5rem;
            font-weight: bold;
        }

        .bh040-feature-content h3 {
            font-size: 1.1rem;
            color: #333;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }

        .bh040-feature-content p {
            color: #666;
            font-size: 0.95rem;
            line-height: 1.6;
        }

        /* 安全保证 */
        .bh040-security {
            background: linear-gradient(135deg, #f0f8ff 0%, #e6f3ff 100%);
            padding: 3rem;
            border-radius: 12px;
            margin: 3rem 0;
            border: 2px solid #0088cc;
        }

        .bh040-security h2 {
            font-size: 1.5rem;
            color: #0088cc;
            margin-bottom: 1.5rem;
            font-weight: 700;
        }

        .bh040-security-points {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
        }

        .bh040-security-point {
            display: flex;
            gap: 1rem;
            align-items: flex-start;
        }

        .bh040-security-check {
            color: #0088cc;
            font-weight: bold;
            font-size: 1.3rem;
            flex-shrink: 0;
        }

        .bh040-security-text {
            color: #555;
            font-size: 0.95rem;
        }

        /* 安装指南 */
        .bh040-guide {
            padding: 3rem 0;
            margin: 3rem 0;
        }

        .bh040-guide-steps {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
        }

        .bh040-step {
            padding: 2rem;
            border-bottom: 1px solid #e0e8f0;
            display: flex;
            gap: 2rem;
        }

        .bh040-step:last-child {
            border-bottom: none;
        }

        .bh040-step-number {
            flex-shrink: 0;
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, #0088cc 0%, #00a8e8 100%);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.3rem;
        }

        .bh040-step-content h3 {
            font-size: 1.2rem;
            color: #333;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }

        .bh040-step-content p {
            color: #666;
            font-size: 0.95rem;
            line-height: 1.6;
        }

        /* FAQ */
        .bh040-faq {
            padding: 3rem 0;
            margin: 3rem 0;
        }

        .bh040-faq-items {
            display: grid;
            gap: 1.5rem;
        }

        .bh040-faq-item {
            background: white;
            border: 1px solid #e0e8f0;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
        }

        .bh040-faq-question {
            padding: 1.5rem;
            background: #f9fbfd;
            cursor: pointer;
            font-weight: 600;
            color: #333;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: all 0.3s ease;
            user-select: none;
        }

        .bh040-faq-question:hover {
            background: #eef5fb;
            color: #0088cc;
        }

        .bh040-faq-toggle {
            color: #0088cc;
            font-size: 1.5rem;
            font-weight: bold;
            transition: transform 0.3s ease;
        }

        .bh040-faq-item.bh040-active .bh040-faq-toggle {
            transform: rotate(180deg);
        }

        .bh040-faq-answer {
            padding: 0 1.5rem;
            max-height: 0;
            overflow: hidden;
            transition: all 0.3s ease;
            background: white;
        }

        .bh040-faq-item.bh040-active .bh040-faq-answer {
            padding: 1.5rem;
            max-height: 500px;
        }

        .bh040-faq-answer p {
            color: #666;
            font-size: 0.95rem;
            line-height: 1.6;
            font-weight: normal;
        }

        /* 页脚 */
        .bh040-footer {
            background: #1a1a1a;
            color: #ccc;
            padding: 3rem 0 1rem;
            margin-top: 4rem;
        }

        .bh040-footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .bh040-footer-section h4 {
            color: white;
            margin-bottom: 1rem;
            font-size: 1rem;
            font-weight: 600;
        }

        .bh040-footer-section ul {
            list-style: none;
        }

        .bh040-footer-section ul li {
            margin-bottom: 0.5rem;
        }

        .bh040-footer-section a {
            color: #ccc;
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.3s ease;
        }

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

        .bh040-footer-bottom {
            border-top: 1px solid #333;
            padding-top: 2rem;
            text-align: center;
            color: #999;
            font-size: 0.9rem;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .bh040-navbar-container {
                padding: 0 1rem;
            }

            .bh040-nav-menu {
                gap: 1rem;
            }

            .bh040-nav-link {
                font-size: 0.85rem;
                padding: 0.4rem 0.6rem;
            }

            .bh040-hero {
                padding: 2rem;
            }

            .bh040-hero-content {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .bh040-hero-text h1 {
                font-size: 2rem;
            }

            .bh040-hero-text p {
                font-size: 1rem;
            }

            .bh040-container {
                padding: 0 1rem;
            }

            .bh040-cta-title {
                font-size: 1.5rem;
            }

            .bh040-section-title {
                font-size: 1.5rem;
            }

            .bh040-download-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

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

            .bh040-step {
                flex-direction: column;
                gap: 1rem;
            }

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

        @media (max-width: 480px) {
            .bh040-hero-text h1 {
                font-size: 1.5rem;
            }

            .bh040-cta-title {
                font-size: 1.3rem;
            }

            .bh040-nav-menu {
                gap: 0.5rem;
                flex-wrap: wrap;
            }

            .bh040-download-btn {
                padding: 0.8rem 1.5rem;
                font-size: 0.9rem;
            }

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