* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', Arial, sans-serif;
        }
        
        main {
            background-color: #ffffff;
            color: #333;
            line-height: 1.6;
            padding: 40px 20px;
            max-width: 1200px;
            margin: 0 auto;
            margin-top:200px;

        }
        
        /* 顶部区域 */
        .top-section {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 60px;
            flex-wrap: wrap;
        }
        
        .title-section {
            flex: 1;
            min-width: 300px;
        }
        
        .main-title {
            font-size: 32px;
            font-weight: 700;
            color: #1a3a6c;
            margin-bottom: 24px;
            line-height: 1.3;
        }
        
        .business-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 30px;
        }
        
        .tag {
            background-color: #f0f7ff;
            color: #1a6fd0;
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 15px;
            font-weight: 500;
            border: 1px solid #d1e5ff;
            transition: all 0.3s;
        }
        
        .tag:hover {
            background-color: #1a6fd0;
            color: white;
            transform: translateY(-2px);
        }
        
        .solution-btn {
            background: linear-gradient(135deg, #1a6fd0, #4a9bff);
            color: white;
            border: none;
            padding: 14px 32px;
            border-radius: 6px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            box-shadow: 0 4px 12px rgba(26, 111, 208, 0.2);
        }
        
        .solution-btn:hover {
            background: linear-gradient(135deg, #155bb5, #3a8ae8);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(26, 111, 208, 0.3);
        }
        
        /* 右侧图表区域 */
        .chart-section {
            flex: 0 0 280px;
            background-color: #f0f8ff;
            border-radius: 12px;
            padding: 20px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            border: 1px solid #e1f0ff;
            box-shadow: 0 8px 20px rgba(0, 102, 204, 0.08);
        }
        
        .chart-title {
            color: #1a6fd0;
            font-weight: 600;
            margin-bottom: 15px;
            font-size: 16px;
        }
        
        .chart-container {
            width: 100%;
            height: 160px;
            position: relative;
        }
        
        .chart-bar {
            position: absolute;
            bottom: 0;
            width: 16%;
            background: linear-gradient(to top, #1a6fd0, #4a9bff);
            border-radius: 4px 4px 0 0;
            transition: height 0.5s ease;
        }
        
        .chart-bar:nth-child(1) { left: 5%; height: 70%; }
        .chart-bar:nth-child(2) { left: 25%; height: 85%; }
        .chart-bar:nth-child(3) { left: 45%; height: 60%; }
        .chart-bar:nth-child(4) { left: 65%; height: 95%; }
        .chart-bar:nth-child(5) { left: 85%; height: 75%; }
        
        .chart-bar::after {
            content: attr(data-value);
            position: absolute;
            top: -25px;
            left: 50%;
            transform: translateX(-50%);
            color: #1a6fd0;
            font-weight: 600;
            font-size: 13px;
        }
        
        /* 案例展示区域 */
        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        
        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: #1a3a6c;
            margin-bottom: 12px;
        }
        
        .section-subtitle {
            color: #666;
            font-size: 16px;
            max-width: 800px;
            margin: 0 auto;
            line-height: 1.7;
        }
        
        /* 案例卡片容器 */
        .cases-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-bottom: 50px;
        }
        
        .case-card {
            background-color: white;
            border-radius: 10px;
            padding: 24px;
            height: 180px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            transition: all 0.3s ease;
            border: 1px solid #e6f0ff;
            box-shadow: 0 4px 12px rgba(0, 60, 120, 0.05);
            position: relative;
            overflow: hidden;
        }
        
        .case-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 12px 24px rgba(26, 111, 208, 0.12);
            border-color: #4a9bff;
        }
        
        .case-header {
            display: flex;
            align-items: center;
            margin-bottom: 16px;
        }
        
        .case-logo {
            width: 48px;
            height: 48px;
            border-radius: 8px;
            margin-right: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            color: white;
            font-size: 18px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }
        
        .case-name {
            font-size: 18px;
            font-weight: 700;
            color: #1a3a6c;
        }
        
        .case-description {
            color: #666;
            font-size: 14px;
            line-height: 1.6;
            flex-grow: 1;
        }
        
        .view-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(26, 111, 208, 0.95), rgba(74, 155, 255, 0.95));
            color: white;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            opacity: 0;
            transition: opacity 0.3s;
            border-radius: 10px;
            padding: 24px;
            text-align: center;
            backdrop-filter: blur(2px);
        }
        
        .case-card:hover .view-overlay {
            opacity: 1;
        }
        
        .view-btn {
            background-color: white;
            color: #1a6fd0;
            border: none;
            padding: 10px 24px;
            border-radius: 6px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            margin-top: 16px;
            transition: all 0.3s;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }
        
        .view-btn:hover {
            background-color: #f0f8ff;
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }
        
        /* 分页导航 */
        .pagination {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin-top: 40px;
        }
        
        .page-btn {
            width: 44px;
            height: 44px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            background-color: #f0f8ff;
            color: #1a6fd0;
            border: 1px solid #d1e5ff;
            cursor: pointer;
            transition: all 0.3s;
            font-weight: 600;
            font-size: 16px;
        }
        
        .page-btn.active {
            background: linear-gradient(135deg, #1a6fd0, #4a9bff);
            color: white;
            border-color: #1a6fd0;
            box-shadow: 0 4px 8px rgba(26, 111, 208, 0.2);
        }
        
        .page-btn:hover:not(.active) {
            background-color: #e1f0ff;
            border-color: #4a9bff;
        }
        
        /* 案例详情模态框 */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.7);
            z-index: 1000;
            justify-content: center;
            align-items: center;
            padding: 20px;
        }
        
        .modal-content {
            background-color: white;
            width: 90%;
            max-width: 800px;
            border-radius: 12px;
            padding: 40px;
            max-height: 85vh;
            overflow-y: auto;
            position: relative;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
        }
        
        .close-modal {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 28px;
            color: #999;
            cursor: pointer;
            background: none;
            border: none;
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: color 0.3s;
        }
        
        .close-modal:hover {
            color: #1a6fd0;
        }
        
        .modal-title {
            font-size: 26px;
            color: #1a3a6c;
            margin-bottom: 10px;
            padding-right: 40px;
        }
        
        .modal-subtitle {
            color: #1a6fd0;
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 25px;
            padding-bottom: 15px;
            border-bottom: 1px solid #e6f0ff;
        }
        
        .modal-body {
            line-height: 1.8;
        }
        
        .modal-body h3 {
            color: #1a3a6c;
            margin: 24px 0 12px;
            font-size: 18px;
        }
        
        .modal-body ul {
            margin-left: 24px;
            margin-bottom: 18px;
        }
        
        .modal-body li {
            margin-bottom: 8px;
            position: relative;
        }
        
        .modal-body li:before {
            content: "•";
            color: #1a6fd0;
            font-weight: bold;
            position: absolute;
            left: -15px;
        }
        
        .modal-body p {
            margin-bottom: 18px;
        }
        
        .quote {
            background-color: #f0f8ff;
            border-left: 4px solid #1a6fd0;
            padding: 16px 20px;
            margin: 20px 0;
            font-style: italic;
            border-radius: 0 8px 8px 0;
        }
        
        /* 响应式设计 */
        @media (max-width: 1100px) {
            .cases-container {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        
        @media (max-width: 900px) {
            .top-section {
                flex-direction: column;
            }
            
            .chart-section {
                margin-top: 30px;
                width: 100%;
                max-width: 400px;
            }
            
            .cases-container {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 600px) {
            .cases-container {
                grid-template-columns: 1fr;
            }
            
            .main-title {
                font-size: 28px;
            }
            
            .section-title {
                font-size: 24px;
            }
            
            .business-tags {
                justify-content: center;
            }
        }