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

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

        /* 导航栏样式 */
        .bh040-navbar-wrapper {
            background: linear-gradient(135deg, #0088cc 0%, #005fa3 100%);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .bh040-navbar-container {
            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: 12px;
        }

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

        .bh040-brand-name {
            color: white;
            font-size: 18px;
            font-weight: 600;
            letter-spacing: 0.5px;
        }

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

        .bh040-nav-link {
            color: white;
            text-decoration: none;
            font-size: 15px;
            font-weight: 500;
            transition: all 0.3s ease;
            padding: 8px 12px;
            border-radius: 4px;
        }

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

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

        /* 顶部横幅 */
        .bh040-hero-section {
            background: linear-gradient(135deg, #0088cc 0%, #005fa3 100%);
            color: white;
            padding: 60px 20px;
            text-align: center;
            margin-bottom: 50px;
        }

        .bh040-hero-title {
            font-size: 48px;
            font-weight: 700;
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .bh040-hero-subtitle {
            font-size: 20px;
            margin-bottom: 30px;
            opacity: 0.95;
            font-weight: 300;
        }

        .bh040-hero-cta-btn {
            display: inline-block;
            background: white;
            color: #0088cc;
            padding: 14px 40px;
            font-size: 16px;
            font-weight: 600;
            border-radius: 6px;
            text-decoration: none;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        }

        .bh040-hero-cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        }

        /* 内容区 */
        .bh040-content-section {
            margin-bottom: 60px;
        }

        .bh040-section-title {
            font-size: 32px;
            font-weight: 700;
            color: #0088cc;
            margin-bottom: 30px;
            padding-bottom: 15px;
            border-bottom: 3px solid #0088cc;
        }

        .bh040-section-subtitle {
            font-size: 24px;
            font-weight: 600;
            color: #005fa3;
            margin-top: 40px;
            margin-bottom: 20px;
            padding-left: 15px;
            border-left: 4px solid #0088cc;
        }

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

        .bh040-tutorial-step:hover {
            background: #f0f4f8;
            box-shadow: 0 4px 12px rgba(0, 136, 204, 0.1);
        }

        .bh040-step-number {
            display: inline-block;
            background: #0088cc;
            color: white;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            text-align: center;
            line-height: 40px;
            font-weight: 700;
            font-size: 18px;
            margin-right: 15px;
        }

        .bh040-step-title {
            font-size: 18px;
            font-weight: 600;
            color: #333;
            display: inline-block;
            vertical-align: middle;
            margin-bottom: 15px;
        }

        .bh040-step-content {
            margin-left: 55px;
            color: #666;
            line-height: 1.8;
        }

        .bh040-step-content p {
            margin-bottom: 10px;
        }

        .bh040-step-tip {
            background: #e3f2fd;
            border-left: 4px solid #2196f3;
            padding: 15px;
            margin-top: 15px;
            border-radius: 4px;
            font-size: 14px;
            color: #1565c0;
        }

        .bh040-feature-list {
            list-style: none;
            margin: 20px 0;
        }

        .bh040-feature-item {
            padding: 12px 0;
            padding-left: 35px;
            position: relative;
            color: #666;
            line-height: 1.7;
        }

        .bh040-feature-item::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: #0088cc;
            font-weight: 700;
            font-size: 18px;
        }

        /* 两列布局 */
        .bh040-two-column {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            margin: 30px 0;
            align-items: start;
        }

        .bh040-column-text {
            color: #666;
            line-height: 1.8;
        }

        .bh040-column-text p {
            margin-bottom: 15px;
        }

        .bh040-column-image {
            background: #f0f4f8;
            padding: 20px;
            border-radius: 8px;
            text-align: center;
            min-height: 300px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .bh040-column-image img {
            max-width: 100%;
            height: auto;
            border-radius: 6px;
        }

        .bh040-placeholder-image {
            background: linear-gradient(135deg, #e0e7ff 0%, #cffafe 100%);
            width: 100%;
            height: 300px;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #666;
            font-size: 16px;
        }

        /* CTA区域 */
        .bh040-cta-section {
            background: linear-gradient(135deg, #0088cc 0%, #005fa3 100%);
            color: white;
            padding: 50px 40px;
            border-radius: 12px;
            text-align: center;
            margin: 60px 0;
            box-shadow: 0 8px 30px rgba(0, 136, 204, 0.2);
        }

        .bh040-cta-title {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 15px;
        }

        .bh040-cta-text {
            font-size: 16px;
            margin-bottom: 25px;
            opacity: 0.95;
        }

        .bh040-cta-button {
            display: inline-block;
            background: white;
            color: #0088cc;
            padding: 16px 45px;
            font-size: 16px;
            font-weight: 600;
            border-radius: 6px;
            text-decoration: none;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        }

        .bh040-cta-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        }

        /* FAQ区域 */
        .bh040-faq-container {
            margin: 50px 0;
        }

        .bh040-faq-item {
            background: white;
            border: 1px solid #e0e0e0;
            border-radius: 8px;
            margin-bottom: 15px;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .bh040-faq-item:hover {
            box-shadow: 0 4px 12px rgba(0, 136, 204, 0.1);
            border-color: #0088cc;
        }

        .bh040-faq-question {
            background: #f8f9fa;
            padding: 20px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            color: #333;
            transition: all 0.3s ease;
            user-select: none;
        }

        .bh040-faq-question:hover {
            background: #f0f4f8;
        }

        .bh040-faq-toggle {
            color: #0088cc;
            font-size: 20px;
            transition: transform 0.3s ease;
        }

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

        .bh040-faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.3s ease;
            color: #666;
            line-height: 1.8;
        }

        .bh040-faq-item.active .bh040-faq-answer {
            max-height: 500px;
            padding: 20px;
        }

        /* 页脚 */
        .bh040-footer-wrapper {
            background: #1a1a1a;
            color: #999;
            padding: 50px 20px 20px;
            margin-top: 80px;
        }

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

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

        .bh040-footer-section h4 {
            color: white;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .bh040-footer-link {
            display: block;
            color: #999;
            text-decoration: none;
            margin-bottom: 12px;
            transition: color 0.3s ease;
            font-size: 14px;
        }

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

        .bh040-footer-bottom {
            border-top: 1px solid #333;
            padding-top: 20px;
            text-align: center;
            font-size: 14px;
            color: #666;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .bh040-hero-title {
                font-size: 32px;
            }

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

            .bh040-nav-menu {
                gap: 15px;
            }

            .bh040-nav-link {
                font-size: 13px;
                padding: 6px 10px;
            }

            .bh040-two-column {
                grid-template-columns: 1fr;
                gap: 30px;
            }

            .bh040-section-title {
                font-size: 26px;
            }

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

            .bh040-footer-content {
                grid-template-columns: repeat(2, 1fr);
                gap: 30px;
            }

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

            .bh040-cta-button {
                padding: 12px 35px;
                font-size: 14px;
            }
        }

        @media (max-width: 480px) {
            .bh040-navbar-container {
                height: auto;
                flex-wrap: wrap;
                padding: 15px 20px;
            }

            .bh040-nav-menu {
                width: 100%;
                gap: 10px;
                margin-top: 15px;
                flex-wrap: wrap;
            }

            .bh040-nav-link {
                flex: 1;
                text-align: center;
                min-width: 80px;
            }

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

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

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

            .bh040-hero-cta-btn {
                padding: 12px 30px;
                font-size: 14px;
            }

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

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

            .bh040-step-number {
                width: 35px;
                height: 35px;
                line-height: 35px;
                font-size: 16px;
            }

            .bh040-step-content {
                margin-left: 50px;
            }
        }

        /* 额外样式 */
        .bh040-strong-text {
            color: #0088cc;
            font-weight: 600;
        }

        .bh040-highlight-box {
            background: linear-gradient(135deg, #e3f2fd 0%, #f3e5f5 100%);
            border-left: 4px solid #0088cc;
            padding: 20px;
            border-radius: 6px;
            margin: 20px 0;
        }

        .bh040-highlight-box h3 {
            color: #0088cc;
            margin-bottom: 10px;
        }

        .bh040-divider {
            height: 2px;
            background: linear-gradient(90deg, transparent, #0088cc, transparent);
            margin: 40px 0;
        }