/* 案例卡片美化 */
        .case-card {
            transition: transform 0.25s ease, box-shadow 0.25s ease;
            height: 100%;
            border: none;
            border-radius: 12px;
            overflow: hidden;
        }
        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.12);
        }
        .case-card img {
            height: 200px;
            object-fit: cover;
            background-color: #f8f9fa;
        }
        .case-card .card-body {
            padding: 1.25rem;
        }
        .case-card .card-title {
            font-size: 1.25rem;
            font-weight: 600;
            color: #212529;
            margin-bottom: 0.75rem;
        }
        .case-card .card-text {
            color: #6c757d;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* Logo 墙优化 */
        .logo-wall {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px;
            margin-top: 1.5rem;
        }
        .logo-wall img {
            width: 100px;
            height: 60px;
            object-fit: contain;
            filter: grayscale(100%) opacity(0.7);
            transition: all 0.3s ease;
        }
        .logo-wall img:hover {
            filter: grayscale(0%) opacity(1);
            transform: scale(1.05);
        }

        /* 标题美化 */
        .section-title {
            position: relative;
            margin-bottom: 2rem;
            font-weight: 600;
            color: #343a40;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background: #0d6efd;
            border-radius: 2px;
        }

        /* 空状态 */
        .empty-state {
            padding: 3rem 1rem;
            text-align: center;
            color: #adb5bd;
            font-style: italic;
        }

        /* 保证每行显示3个项目 */
        @media (min-width: 768px) {
            .case-grid .col-lg-4 {
                max-width: calc(100% / 3);
                flex: 0 0 calc(100% / 3);
            }
        }