/* 主容器：毛玻璃轻质感 */
        .case-premium {
            max-width: 1450px;
            width: 100%;
			margin: 0 auto;
            backdrop-filter: blur(3px);
            padding: 1.5rem 1rem;
            transition: all 0.2s;
        }

        /* 轮播核心行：左右箭头 + 滚动视窗 */
        .case-row {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.9rem;
            position: relative;
        }

        /* 箭头按钮样式（位于图片两侧） */
        .arrow-btn {
            background: rgba(20, 32, 48, 0.85);
            backdrop-filter: blur(10px);
            border: none;
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.25s cubic-bezier(0.2, 0.9, 0.4, 1.1);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
            color: white;
            font-size: 34px;
            font-weight: 500;
            z-index: 15;
            flex-shrink: 0;
            line-height: 1;
        }

        .arrow-btn:hover {
            background: #1f4460;
            transform: scale(1.06);
            box-shadow: 0 14px 26px rgba(0, 0, 0, 0.3);
        }

        .arrow-btn:active {
            transform: scale(0.94);
        }

        /* 视窗：溢出隐藏 */
        .case-viewport {
            flex: 1;
            overflow: hidden;
            background: rgba(0, 0, 0, 0.02);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
        }

        /* ----- 核心：使用 ul 列表，li 表示每张图片 + 标题，图片内容在 div 中 ----- */
        .case-list {
            display: flex;
            flex-wrap: nowrap;
            transition: transform 0.45s cubic-bezier(0.2, 0.9, 0.4, 1.1);
            will-change: transform;
            cursor: grab;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .case-list:active {
            cursor: grabbing;
        }

        /* 每一个 li 代表一个完整的图片组（图片+标题） */
        .case-item {
            flex: 0 0 auto;
            padding: 0 8px;
            list-style: none;
        }

        /* 图片内容容器 div (满足：每组图片和标题用li来做，放在div里面) */
        .case-card {
            background: #ffffff;
            overflow: hidden;
            box-shadow: 0 15px 25px -10px rgba(0, 0, 0, 0.2);
            transition: all 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .case-card img {
            width: 100%;
            height: auto;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            transition: transform 0.35s ease;
            background: #eef2f7;
        }

        /* 标题区域 (图片说明) */
        .card-title {
            padding: 12px 12px 14px;
            text-align: center;
            font-weight: 500;
            font-size: 0.9rem;
            color: #1f2a3e;
            background: rgba(255, 255, 250, 0.94);
            border-top: 1px solid rgba(0, 0, 0, 0.05);
            letter-spacing: 0.3px;
        }

        /* 桌面悬停效果 */
        @media (min-width: 768px) {
            .case-card:hover img {
                transform: scale(1.02);
            }
            .case-card:hover {
                box-shadow: 0 22px 32px -12px rgba(0, 0, 0, 0.3);
            }
        }

        
        .case-item {
            width: 100%;
        }

        /* 电脑端: 宽度 ≥ 1024px 时显示 3 张图片 */
        @media (min-width: 1024px) {
            .case-item {
                width: 33.333333%;
            }
        }

        /* 手机端优化 */
        @media (max-width: 767px) {
            .case-item {
                width: 100%;
            }
            .arrow-btn {
                width: 44px;
                height: 44px;
                font-size: 28px;
            }
            .case-row {
                gap: 0.5rem;
            }
            .card-title {
                font-size: 0.75rem;
                padding: 8px 6px;
            }
			
			
        }

        /* 拖拽时锁定滚动 */
        body.dragging-active {
            overflow: hidden;
        }

        /* 重置列表样式 */
        .case-list {
            margin-block-start: 0;
            margin-block-end: 0;
            padding-inline-start: 0;
        }
.casebt{
	max-width: 1400px; width: 90%; height: 100px; margin: 0 auto; 
}
.casebta{
	 margin: 0 auto; font-size: 26px;color: #2a5298;font-weight: 900; 
}