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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }

        /* 导航栏样式 */
        .bh040-navbar-container {
            background: linear-gradient(135deg, #0088cc 0%, #0077b6 100%);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .bh040-navbar-wrapper {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

        .bh040-logo-section {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
            color: white;
        }

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

        .bh040-logo-text {
            font-size: 18px;
            color: white;
            text-decoration: none;
        }

        .bh040-nav-menu {
            display: flex;
            gap: 30px;
            list-style: none;
        }

        .bh040-nav-link {
            color: white;
            text-decoration: none;
            font-size: 14px;
            transition: all 0.3s ease;
            position: relative;
            padding-bottom: 5px;
        }

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

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

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

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

        /* 英雄区域 */
        .bh040-hero-section {
            background: linear-gradient(135deg, #0088cc 0%, #0077b6 100%);
            color: white;
            padding: 80px 20px;
            text-align: center;
            margin-bottom: 60px;
            border-radius: 0 0 20px 20px;
        }

        .bh040-hero-title {
            font-size: 42px;
            font-weight: 700;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .bh040-hero-subtitle {
            font-size: 18px;
            margin-bottom: 30px;
            opacity: 0.95;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .bh040-cta-button-primary {
            display: inline-block;
            background-color: #fff;
            color: #0088cc;
            padding: 14px 40px;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            font-size: 16px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        }

        .bh040-cta-button-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        }

        /* 内容区域 */
        .bh040-content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            margin-bottom: 60px;
        }

        .bh040-main-content {
            background: white;
            padding: 40px;
            border-radius: 12px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
        }

        /* 目录侧边栏 */
        .bh040-sidebar-toc {
            background: white;
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
            height: fit-content;
            position: sticky;
            top: 90px;
        }

        .bh040-toc-title {
            font-size: 16px;
            font-weight: 600;
            color: #0088cc;
            margin-bottom: 15px;
        }

        .bh040-toc-list {
            list-style: none;
        }

        .bh040-toc-item {
            margin-bottom: 10px;
        }

        .bh040-toc-link {
            color: #666;
            text-decoration: none;
            font-size: 14px;
            transition: all 0.3s ease;
        }

        .bh040-toc-link:hover {
            color: #0088cc;
            padding-left: 5px;
        }

        /* 段落和文本 */
        .bh040-section-title {
            font-size: 28px;
            font-weight: 700;
            color: #222;
            margin-top: 40px;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 3px solid #0088cc;
        }

        .bh040-section-title:first-child {
            margin-top: 0;
        }

        .bh040-subsection-title {
            font-size: 20px;
            font-weight: 600;
            color: #333;
            margin-top: 30px;
            margin-bottom: 15px;
        }

        .bh040-paragraph {
            margin-bottom: 15px;
            line-height: 1.8;
            color: #555;
        }

        .bh040-highlight-text {
            background-color: #fff3cd;
            padding: 2px 6px;
            border-radius: 4px;
            color: #856404;
        }

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

        /* 步骤列表 */
        .bh040-steps-container {
            margin: 30px 0;
        }

        .bh040-step-item {
            display: flex;
            gap: 20px;
            margin-bottom: 25px;
            background: #f8f9fa;
            padding: 20px;
            border-radius: 8px;
            border-left: 4px solid #0088cc;
            transition: all 0.3s ease;
        }

        .bh040-step-item:hover {
            box-shadow: 0 4px 12px rgba(0, 136, 204, 0.15);
        }

        .bh040-step-number {
            min-width: 40px;
            height: 40px;
            background: #0088cc;
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
        }

        .bh040-step-content {
            flex: 1;
        }

        .bh040-step-title {
            font-weight: 600;
            color: #222;
            margin-bottom: 8px;
            font-size: 16px;
        }

        .bh040-step-desc {
            color: #666;
            font-size: 14px;
            line-height: 1.6;
        }

        /* 功能列表 */
        .bh040-feature-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin: 30px 0;
        }

        .bh040-feature-card {
            background: linear-gradient(135deg, #f0f7ff 0%, #e8f2ff 100%);
            padding: 20px;
            border-radius: 8px;
            border-left: 4px solid #0088cc;
            transition: all 0.3s ease;
        }

        .bh040-feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 16px rgba(0, 136, 204, 0.15);
        }

        .bh040-feature-name {
            font-weight: 600;
            color: #0088cc;
            margin-bottom: 8px;
            font-size: 15px;
        }

        .bh040-feature-desc {
            color: #666;
            font-size: 14px;
            line-height: 1.6;
        }

        /* 注意事项 */
        .bh040-note-box {
            background: #fff3cd;
            border-left: 4px solid #ffc107;
            padding: 20px;
            border-radius: 8px;
            margin: 30px 0;
        }

        .bh040-note-title {
            font-weight: 600;
            color: #856404;
            margin-bottom: 10px;
        }

        .bh040-note-text {
            color: #856404;
            font-size: 14px;
            line-height: 1.6;
        }

        /* 安全建议 */
        .bh040-security-box {
            background: #d4edda;
            border-left: 4px solid #28a745;
            padding: 20px;
            border-radius: 8px;
            margin: 30px 0;
        }

        .bh040-security-title {
            font-weight: 600;
            color: #155724;
            margin-bottom: 10px;
        }

        .bh040-security-text {
            color: #155724;
            font-size: 14px;
            line-height: 1.6;
        }

        /* CTA区域 */
        .bh040-cta-section {
            background: linear-gradient(135deg, #0088cc 0%, #0077b6 100%);
            color: white;
            padding: 60px 40px;
            border-radius: 12px;
            text-align: center;
            margin-bottom: 60px;
        }

        .bh040-cta-section-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 15px;
        }

        .bh040-cta-section-desc {
            font-size: 16px;
            margin-bottom: 30px;
            opacity: 0.95;
        }

        .bh040-cta-button-secondary {
            display: inline-block;
            background-color: #fff;
            color: #0088cc;
            padding: 14px 40px;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            font-size: 16px;
            transition: all 0.3s ease;
            margin: 0 10px;
        }

        .bh040-cta-button-secondary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
        }

        /* FAQ 区域 */
        .bh040-faq-section {
            background: white;
            padding: 40px;
            border-radius: 12px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
            margin-bottom: 60px;
        }

        .bh040-faq-title {
            font-size: 28px;
            font-weight: 700;
            color: #222;
            margin-bottom: 30px;
            padding-bottom: 15px;
            border-bottom: 3px solid #0088cc;
        }

        .bh040-faq-item {
            margin-bottom: 20px;
            border-bottom: 1px solid #eee;
            padding-bottom: 20px;
        }

        .bh040-faq-item:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }

        .bh040-faq-question {
            font-weight: 600;
            color: #0088cc;
            margin-bottom: 10px;
            cursor: pointer;
            font-size: 15px;
        }

        .bh040-faq-answer {
            color: #666;
            font-size: 14px;
            line-height: 1.7;
        }

        /* 页脚 */
        .bh040-footer-container {
            background: #222;
            color: #aaa;
            padding: 50px 20px 30px;
        }

        .bh040-footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-bottom: 40px;
        }

        .bh040-footer-column-title {
            font-weight: 600;
            color: white;
            margin-bottom: 15px;
            font-size: 15px;
        }

        .bh040-footer-link {
            display: block;
            color: #aaa;
            text-decoration: none;
            font-size: 14px;
            margin-bottom: 10px;
            transition: color 0.3s ease;
        }

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

        .bh040-footer-bottom {
            max-width: 1200px;
            margin: 0 auto;
            padding-top: 30px;
            border-top: 1px solid #444;
            text-align: center;
            font-size: 13px;
            color: #888;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .bh040-navbar-wrapper {
                flex-direction: column;
                height: auto;
                padding: 15px 20px;
                gap: 15px;
            }

            .bh040-nav-menu {
                flex-direction: column;
                gap: 15px;
                width: 100%;
                text-align: center;
            }

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

            .bh040-hero-subtitle {
                font-size: 16px;
            }

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

            .bh040-sidebar-toc {
                position: static;
                margin-bottom: 40px;
            }

            .bh040-section-title {
                font-size: 24px;
            }

            .bh040-subsection-title {
                font-size: 18px;
            }

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

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

            .bh040-cta-section {
                padding: 40px 20px;
            }

            .bh040-cta-section-title {
                font-size: 24px;
            }
        }

        @media (max-width: 480px) {
            .bh040-main-content {
                padding: 20px;
            }

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

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

            .bh040-section-title {
                font-size: 20px;
            }

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

            .bh040-step-item {
                flex-direction: column;
                align-items: flex-start;
            }

            .bh040-cta-button-primary,
            .bh040-cta-button-secondary {
                display: block;
                width: 100%;
                text-align: center;
                margin-bottom: 10px;
            }
        }