/* 主容器 */
        body {
            padding-top: 60px;
            background: #f5f7fa;
        }
        
        .main-content {
            min-height: calc(100vh - 60px);
        }
        
        /* Hero区 - 腾讯云风格 */
        .hero-section {
            background: linear-gradient(135deg, #0052d9 0%, #0043b3 50%, #003087 100%);
            color: white;
            padding: 100px 0;
            position: relative;
            overflow: hidden;
        }
        
        .hero-section::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: 
                radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(255, 106, 0, 0.1) 0%, transparent 50%);
            opacity: 0.6;
        }
        
        .hero-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
            text-align: center;
        }
        
        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        
        .hero-subtitle {
            font-size: 1.3rem;
            opacity: 0.95;
            max-width: 700px;
            margin: 0 auto;
            line-height: 1.6;
        }
        
        /* 内容区 */
        .content-section {
            padding: 80px 0;
            background: white;
        }
        
        .content-section.alt-bg {
            background: #f5f7fa;
        }
        
        .section-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        
        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .section-title {
            font-size: 2.5rem;
            font-weight: 700;
            color: #1f2937;
            margin-bottom: 16px;
        }
        
        .section-subtitle {
            font-size: 1.2rem;
            color: #6b7280;
            max-width: 700px;
            margin: 0 auto;
        }
        
        /* 折叠展开样式 - 腾讯云风格 */
        .collapsible-section {
            border: 2px solid #e5e7eb;
            border-radius: 12px;
            margin-bottom: 24px;
            background: white;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }
        
        .collapsible-section:hover {
            box-shadow: 0 4px 12px rgba(0, 82, 217, 0.1);
        }
        
        .collapsible-header {
            padding: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-bottom: 2px solid #e5e7eb;
            background: linear-gradient(135deg, #f8fafc, #f1f5f9);
            cursor: pointer;
            transition: background 0.3s ease;
        }
        
        .collapsible-header:hover {
            background: linear-gradient(135deg, #e0f2fe, #dbeafe);
        }
        
        .collapsible-header.active {
            border-bottom: none;
        }
        
        .collapsible-title {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 1.4rem;
            font-weight: 700;
            color: #1f2937;
            flex: 1;
        }
        
        .collapsible-icon {
            font-size: 2.5rem;
            flex-shrink: 0;
        }
        
        .collapsible-arrow {
            font-size: 1.2rem;
            color: #6b7280;
            transition: transform 0.3s ease;
        }
        
        .collapsible-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }
        
        .collapsible-content.active {
            max-height: 5000px;
            overflow: visible;
        }
        
        .collapsible-body {
            padding: 32px 24px;
        }
        
        .collapsible-subsection {
            margin-bottom: 24px;
        }
        
        .collapsible-subsection:last-child {
            margin-bottom: 0;
        }
        
        .subsection-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: #1f2937;
            margin-bottom: 12px;
            padding: 16px 20px;
            border-left: 4px solid #0052d9;
            cursor: pointer;
            transition: all 0.3s ease;
            background: #f8fafc;
            border-radius: 0 8px 8px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            user-select: none;
        }
        
        .subsection-title:hover {
            background: #e0f2fe;
            border-left-color: #0043b3;
        }
        
        .subsection-title.active {
            background: linear-gradient(135deg, #dbeafe, #e0f2fe);
            border-left-color: #0052d9;
        }
        
        .subsection-arrow {
            font-size: 1rem;
            color: #6b7280;
            transition: transform 0.3s ease;
        }
        
        .subsection-title.active .subsection-arrow {
            transform: rotate(180deg);
        }
        
        .subsection-content {
            color: #4b5563;
            line-height: 1.8;
            font-size: 1rem;
            margin-bottom: 16px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 20px;
        }
        
        .subsection-content.active {
            max-height: 1000px;
            padding: 16px 20px;
        }
        
        .subsection-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .subsection-list li {
            padding: 8px 0;
            padding-left: 24px;
            position: relative;
            color: #4b5563;
            line-height: 1.8;
        }
        
        .subsection-list li::before {
            content: '●';
            color: #0052d9;
            position: absolute;
            left: 0;
            top: 8px;
            font-weight: 700;
        }
        
        /* 价格体系 */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        
        .pricing-card {
            background: white;
            border: 2px solid #e5e7eb;
            border-radius: 12px;
            padding: 32px 24px;
            text-align: center;
            transition: all 0.3s ease;
        }
        
        .pricing-card:hover {
            border-color: #0052d9;
            box-shadow: 0 12px 32px rgba(0, 82, 217, 0.15);
            transform: translateY(-8px);
        }
        
        .pricing-icon {
            font-size: 3rem;
            margin-bottom: 16px;
        }
        
        .pricing-card h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #1f2937;
            margin-bottom: 8px;
        }
        
        .pricing-card p {
            color: #6b7280;
            margin-bottom: 16px;
        }
        
        .pricing-price {
            font-size: 1.1rem;
            color: #0052d9;
            font-weight: 700;
            padding: 12px;
            background: linear-gradient(135deg, #dbeafe, #e0f2fe);
            border-radius: 8px;
        }
        
        /* 推广流程 */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px 24px;
            position: relative;
        }
        
        .process-card {
            background: white;
            border: 2px solid #e5e7eb;
            border-radius: 12px;
            padding: 32px 24px;
            transition: all 0.3s ease;
            position: relative;
            min-height: 280px;
        }
        
        .process-card:hover {
            border-color: #0052d9;
            box-shadow: 0 8px 24px rgba(0, 82, 217, 0.12);
            transform: translateY(-4px);
        }
        
        .process-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: #0052d9;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        
        .process-number {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, #0052d9, #1677ff);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 800;
            flex-shrink: 0;
        }
        
        .process-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .process-card li {
            padding: 10px 0;
            padding-left: 24px;
            position: relative;
            color: #4b5563;
            line-height: 1.7;
            font-size: 0.95rem;
        }
        
        .process-card li::before {
            content: '•';
            color: #0052d9;
            position: absolute;
            left: 0;
            top: 10px;
            font-weight: 700;
        }
        
        /* 箭头 */
        .process-card::after {
            position: absolute;
            font-size: 2rem;
            color: #0052d9;
            font-weight: 900;
            z-index: 10;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: white;
            border-radius: 50%;
            box-shadow: 0 4px 12px rgba(0, 82, 217, 0.2);
        }
        
        .process-card:nth-child(1)::after {
            content: '→';
            top: 50%;
            left: calc(100% + 12px - 20px);
            transform: translateY(-50%);
        }
        
        .process-card:nth-child(2)::after {
            content: '↓';
            top: calc(100% + 20px);
            left: 50%;
            transform: translateX(-50%);
        }
        
        .process-card:nth-child(3)::after {
            display: none;
        }
        
        .process-card:nth-child(4)::after {
            content: '←';
            top: 50%;
            left: calc(-20px - 12px);
            transform: translateY(-50%);
        }
        
        /* CTA区 */
        .cta-section {
            background: linear-gradient(135deg, #0052d9 0%, #0043b3 100%);
            color: white;
            padding: 80px 0;
            text-align: center;
        }
        
        .cta-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 20px;
        }
        
        .cta-subtitle {
            font-size: 1.2rem;
            margin-bottom: 40px;
            opacity: 0.95;
        }
        
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            border-radius: 4px;
            font-weight: 600;
            font-size: 1.1rem;
            text-decoration: none;
            transition: all 0.3s ease;
            background: white;
            color: #0052d9;
        }
        
        .cta-btn:hover {
            background: #f5f7fa;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
        }
        
        /* 响应式 */
        @media (max-width: 768px) {
            .hero-section {
                padding: 60px 0;
            }
            
            .hero-title {
                font-size: 2rem;
            }
            
            .hero-subtitle {
                font-size: 1rem;
            }
            
            .section-title {
                font-size: 1.8rem;
            }
            
            .pricing-grid {
                grid-template-columns: 1fr;
            }
            
            .process-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            
            .process-card::after {
                display: none !important;
            }
            
            .content-section {
                padding: 50px 0;
            }
            
            .collapsible-header {
                padding: 16px;
            }
            
            .collapsible-title {
                font-size: 1.1rem;
                gap: 12px;
            }
            
            .collapsible-icon {
                font-size: 2rem;
            }
            
            .collapsible-body {
                padding: 20px 16px;
            }
            
            .subsection-title {
                font-size: 1rem;
                padding: 12px 16px;
            }
        }