/* 全局样式 */
        body {
            font-family: 'Microsoft YaHei', Arial, sans-serif;
            color: #333;
            overflow-x: hidden;
        }
        /* 按钮样式 */
        .btn {
            display: inline-block;
            padding: 16px 36px;
            font-size: 18px;
            font-weight: bold;
            text-decoration: none;
            border-radius: 50px;
            transition: all 0.4s cubic-bezier(0.215, 0.61, 0.355, 1);
            border: 2px solid transparent;
            position: relative;
            overflow: hidden;
            z-index: 1;
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: all 0.6s ease;
            z-index: -1;
        }

        .btn:hover::before {
            left: 100%;
        }

        .btn-primary {
            background: linear-gradient(90deg, #0066cc, #0088ff);
            color: white;
            box-shadow: 0 4px 15px rgba(0, 102, 204, 0.3);
        }

        .btn-primary:hover {
            background: transparent;
            border-color: #0066cc;
            color: #0066cc;
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0, 102, 204, 0.4);
        }

        .btn-outline {
            background: transparent;
            border-color: #0066cc;
            color: #0066cc;
            box-shadow: 0 4px 15px rgba(0, 102, 204, 0.1);
        }

        .btn-outline:hover {
            background: linear-gradient(90deg, #0066cc, #0088ff);
            color: white;
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0, 102, 204, 0.4);
        }

        /* 按钮点击效果 */
        .btn:active {
            transform: translateY(-2px);
        }

        /* 页面标题样式 */
        .page-header {
            background: url('https://qiniu.weibeicc.com/image/pic46.png') center/cover no-repeat;
            padding: 150px 0 100px;
            position: relative;
            text-align: center;
            color: white;
        }

        .page-header::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 102, 204, 0.7);
        }

        .page-header .container {
            position: relative;
            z-index: 1;
        }

        .page-header h1 {
            font-size: 48px;
            font-weight: bold;
            margin-bottom: 20px;
            animation: fadeInUp 1s ease;
        }

        .page-header p {
            font-size: 20px;
            animation: fadeInUp 1s ease 0.3s both;
        }

        /* 案例筛选样式 */
        .cases-section {
            padding: 100px 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 80px;
        }

        .section-title h2 {
            font-size: 36px;
            font-weight: bold;
            margin-bottom: 20px;
            color: #333;
        }

        .section-title p {
            font-size: 18px;
            color: #666;
            max-width: 600px;
            margin: 0 auto;
        }

        .filter-tabs {
            display: flex;
            justify-content: center;
            margin-bottom: 60px;
            flex-wrap: wrap;
        }

        .filter-tab {
            padding: 10px 25px;
            margin: 0 10px 10px;
            background: #f1f1f1;
            border: none;
            border-radius: 50px;
            font-size: 16px;
            color: #333;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .filter-tab:hover,
        .filter-tab.active {
            background: #0066cc;
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 102, 204, 0.3);
        }

        /* 案例网格样式 */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
        }

        .case-item {
            position: relative;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }

        .case-item:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }

        .case-image {
            height: 280px;
            overflow: hidden;
        }



        .case-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: all 0.5s ease;
        }

        .case-item:hover .case-image img {
            transform: scale(1.1);
        }

        .case-overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: -1px;
            background: rgba(0, 102, 204, 0.7);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            transform: translateY(100%);
            transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            z-index: 2;
        }

        .case-item:hover .case-overlay {
            transform: translateY(0);
        }

        .case-overlay h3 {
            font-size: 24px;
            font-weight: bold;
            color: white;
            margin-bottom: 10px;
            transform: translateY(30px);
            opacity: 0;
            transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.2s;
        }

        .case-overlay p {
            font-size: 16px;
            color: white;
            margin-bottom: 20px;
            transform: translateY(30px);
            opacity: 0;
            transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.3s;
        }

        .case-item:hover .case-overlay h3,
        .case-item:hover .case-overlay p {
            transform: translateY(0);
            opacity: 1;
        }

        .case-content {
            padding: 30px;
            background: white;
        }

        .case-content h3 {
            font-size: 20px;
            font-weight: bold;
            margin-bottom: 10px;
            color: #333;
        }

        .case-content p {
            font-size: 14px;
            color: #666;
            line-height: 1.6;
            margin-bottom: 15px;
        }

        .case-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 14px;
            color: #999;
        }

        /* 案例详情样式 */
        .case-detail {
            padding: 100px 0;
            background: #f9f9f9;
        }

        .detail-content {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
        }

        .detail-header {
            padding: 50px;
            text-align: center;
            background: linear-gradient(135deg, #0066cc 0%, #0088ff 100%);
            color: white;
        }

        .detail-header h2 {
            font-size: 36px;
            font-weight: bold;
            margin-bottom: 20px;
        }

        .detail-header p {
            font-size: 18px;
            margin-bottom: 30px;
        }

        .detail-body {
            padding: 50px;
        }

        .detail-section {
            margin-bottom: 50px;
        }

        .detail-section h3 {
            font-size: 24px;
            font-weight: bold;
            margin-bottom: 20px;
            color: #333;
        }

        .detail-section p {
            font-size: 16px;
            color: #666;
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .detail-images {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }

        .detail-image {
            border-radius: 10px;
            overflow: hidden;
        }

        .detail-image img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: all 0.3s ease;
        }

        .detail-image:hover img {
            transform: scale(1.1);
        }

        /* 客户评价样式 */
        .testimonials {
            padding: 100px 0;
            background: #f9f9f9;
        }

        .testimonial-slider {
            max-width: 1000px;
            margin: 0 auto;
        }

        .testimonial-item {
            text-align: center;
            padding: 40px;
            background: white;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
        }

        .testimonial-content {
            font-size: 16px;
            color: #666;
            line-height: 1.8;
            margin-bottom: 30px;
            font-style: italic;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
        }

        .author-avatar {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            overflow: hidden;
        }

        .author-avatar img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .author-info h4 {
            font-size: 18px;
            font-weight: bold;
            margin-bottom: 5px;
            color: #333;
        }

        .author-info p {
            font-size: 14px;
            color: #999;
        }

        /* 响应式样式 */
        @media (max-width: 751px) {
            .page-header h1 {
                font-size: 36px;
            }

            .section-title h2 {
                font-size: 28px;
            }

            .cases-section,
            .case-detail,
            .testimonials {
                padding: 60px 0;
            }

            .filter-tabs {
                flex-direction: column;
                align-items: center;
            }

            .filter-tab {
                margin: 5px 0;
                width: 80%;
            }

            .detail-header,
            .detail-body {
                padding: 30px;
            }

            .detail-header h2 {
                font-size: 28px;
            }

            .testimonial-item {
                padding: 30px;
            }

            /* 案例网格响应式样式 */
            .cases-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* 动画效果 */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* 滚动条样式 */
        ::-webkit-scrollbar {
            width: 8px;
        }

        ::-webkit-scrollbar-track {
            background: #f1f1f1;
        }

        ::-webkit-scrollbar-thumb {
            background: #0066cc;
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: #0088ff;
        }

        /* 单个案例时的样式 */
        .cases-grid.single-case {
            grid-template-columns: 1fr;
        }
        
        .cases-grid.single-case .case-image {
            height: 550px;
        }

        /* 两个案例时的样式 */
        .cases-grid.double-case {
            grid-template-columns: repeat(2, 1fr);
        }
        
        .cases-grid.double-case .case-image {
            height: 400px;
        }