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

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

        /* 导航栏样式 */
        .bh040-navbar {
            background: linear-gradient(135deg, #0088cc 0%, #006ba8 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 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .bh040-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: bold;
            color: #fff;
            text-decoration: none;
        }

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

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

        .bh040-nav-link {
            color: #fff;
            text-decoration: none;
            font-size: 0.95rem;
            font-weight: 500;
            transition: opacity 0.3s ease, text-shadow 0.3s ease;
            position: relative;
        }

        .bh040-nav-link:hover {
            opacity: 0.8;
            text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
        }

        .bh040-nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: -5px;
            left: 0;
            background-color: #fff;
            transition: width 0.3s ease;
        }

        .bh040-nav-link:hover::after {
            width: 100%;
        }

        /* 英雄区域 */
        .bh040-hero {
            background: linear-gradient(135deg, #0088cc 0%, #006ba8 50%, #004d7a 100%);
            color: #fff;
            padding: 100px 20px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .bh040-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.1)" fill-opacity="1" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,144C960,149,1056,139,1152,128C1248,117,1344,107,1392,101.3L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
            background-size: cover;
            opacity: 0.3;
        }

        .bh040-hero-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
            margin: 0 auto;
        }

        .bh040-hero h1 {
            font-size: 3rem;
            margin-bottom: 1.5rem;
            font-weight: 700;
            line-height: 1.2;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }

        .bh040-hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 2rem;
            opacity: 0.95;
            font-weight: 300;
        }

        .bh040-cta-buttons {
            display: flex;
            gap: 1.5rem;
            justify-content: center;
            flex-wrap: wrap;
            margin-top: 2rem;
        }

        .bh040-btn {
            padding: 14px 35px;
            font-size: 1rem;
            font-weight: 600;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            text-decoration: none;
            display: inline-block;
            transition: all 0.3s ease;
            text-align: center;
        }

        .bh040-btn-primary {
            background: #fff;
            color: #0088cc;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        }

        .bh040-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
            background: #f5f5f5;
        }

        .bh040-btn-secondary {
            background: transparent;
            color: #fff;
            border: 2px solid #fff;
        }

        .bh040-btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }

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

        /* 功能特性区 */
        .bh040-features {
            padding: 80px 20px;
            background: #f8f9fa;
        }

        .bh040-section-title {
            text-align: center;
            font-size: 2.2rem;
            margin-bottom: 3rem;
            color: #0088cc;
            font-weight: 700;
        }

        .bh040-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }

        .bh040-feature-card {
            background: #fff;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            text-align: center;
        }

        .bh040-feature-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
        }

        .bh040-feature-icon {
            font-size: 3rem;
            margin-bottom: 1rem;
            display: inline-block;
        }

        .bh040-feature-card h3 {
            font-size: 1.3rem;
            margin-bottom: 1rem;
            color: #0088cc;
        }

        .bh040-feature-card p {
            color: #666;
            font-size: 0.95rem;
            line-height: 1.8;
        }

        /* 关于我们区 */
        .bh040-about {
            padding: 80px 20px;
            background: #fff;
        }

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

        .bh040-about-text h2 {
            font-size: 2rem;
            margin-bottom: 1.5rem;
            color: #0088cc;
        }

        .bh040-about-text p {
            margin-bottom: 1rem;
            color: #555;
            line-height: 1.9;
            font-size: 0.95rem;
        }

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

        .bh040-about-image img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        }

        /* 下载区 */
        .bh040-download {
            padding: 80px 20px;
            background: linear-gradient(135deg, #f0f4f8 0%, #e8f1f8 100%);
        }

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

        .bh040-download-item {
            background: #fff;
            padding: 2rem;
            border-radius: 10px;
            text-align: center;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
        }

        .bh040-download-item:hover {
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
            transform: translateY(-5px);
        }

        .bh040-download-icon {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }

        .bh040-download-item h3 {
            font-size: 1.2rem;
            margin-bottom: 0.5rem;
            color: #0088cc;
        }

        .bh040-download-item p {
            color: #666;
            font-size: 0.85rem;
            margin-bottom: 1.5rem;
        }

        .bh040-download-btn {
            background: #0088cc;
            color: #fff;
            padding: 10px 20px;
            border-radius: 5px;
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 600;
            display: inline-block;
            transition: all 0.3s ease;
        }

        .bh040-download-btn:hover {
            background: #006ba8;
            transform: scale(1.05);
        }

        /* FAQ区 */
        .bh040-faq {
            padding: 80px 20px;
            background: #fff;
        }

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

        .bh040-faq-item {
            margin-bottom: 1.5rem;
            border: 1px solid #e0e0e0;
            border-radius: 8px;
            overflow: hidden;
        }

        .bh040-faq-question {
            background: #f5f5f5;
            padding: 1.5rem;
            cursor: pointer;
            font-weight: 600;
            color: #0088cc;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: background 0.3s ease;
        }

        .bh040-faq-question:hover {
            background: #efefef;
        }

        .bh040-faq-toggle {
            font-size: 1.3rem;
            color: #0088cc;
        }

        .bh040-faq-answer {
            padding: 0 1.5rem;
            max-height: 0;
            overflow: hidden;
            transition: all 0.3s ease;
            color: #555;
            line-height: 1.8;
        }

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

        /* 页脚 */
        .bh040-footer {
            background: #1a1a1a;
            color: #fff;
            padding: 4rem 20px 2rem;
        }

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

        .bh040-footer-section h3 {
            margin-bottom: 1.5rem;
            color: #0088cc;
            font-size: 1.1rem;
        }

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

        .bh040-footer-section ul li {
            margin-bottom: 0.8rem;
        }

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

        .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-nav-menu {
                gap: 1rem;
                font-size: 0.85rem;
            }

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

            .bh040-hero-subtitle {
                font-size: 1.05rem;
            }

            .bh040-cta-buttons {
                flex-direction: column;
                align-items: stretch;
            }

            .bh040-btn {
                width: 100%;
            }

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

            .bh040-section-title {
                font-size: 1.8rem;
            }

            .bh040-hero {
                padding: 60px 20px;
            }

            .bh040-features,
            .bh040-about,
            .bh040-download,
            .bh040-faq {
                padding: 50px 20px;
            }
        }

        @media (max-width: 480px) {
            .bh040-navbar-container {
                flex-direction: column;
                gap: 1rem;
            }

            .bh040-nav-menu {
                flex-direction: column;
                gap: 0.5rem;
                width: 100%;
            }

            .bh040-nav-link {
                display: block;
            }

            .bh040-hero h1 {
                font-size: 1.5rem;
            }

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