@media(max-width:750px){

 .seo_cases_list {
            flex: 1 1 100%;
            margin: 10px;
            background: #ffffff;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            height: 300px;
            position: relative;
            overflow: hidden;
        }
.center {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0px;
        }
        
         .f_box4 {
            padding: 3px;
            background-color: #f9f9f9;
        }
	}


@media (min-width: 1500px){
 .f_box4 {
            padding: 20px;
            background-color: #f9f9f9;
        }

        .center {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }

        .ftit h2 {
            font-size: 24px;
            font-weight: bold;
            margin: 0 0 10px;
            text-align: center;
        }

        .seo_cases {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
        }

        .seo_cases_list {
            flex: 1 1 100%;
            margin: 10px;
            background: #ffffff;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            height: 300px;
            position: relative;
            overflow: hidden;
        }}

        @media (min-width: 600px) {
            .seo_cases_list {
                flex: 1 1 45%;
            }
        }

        .title {
            display: flex;
            justify-content: space-between;
            
            padding: 10px;
            position: sticky;
            top: 0;
            z-index: 1;
        }

        .bd {
            height: calc(100% - 50px); /* 留出标题高度 */
            overflow: hidden; /* 不显示滚动条 */
            position: relative;
        }

        .infoList {
            list-style: none;
            padding: 0;
            margin: 0;
            transition: transform 0.5s linear; /* 平滑过渡 */
        }

        .infoList li {
            padding: 8px 0;
            border-bottom: 1px solid #eee;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .infoList li a {
            display: flex;
            justify-content: space-between;
            width: 100%;
            padding: 0 10px;
            text-decoration: none;
            color: #333;
            transition: background-color 0.3s;
        }

        .infoList li a:hover,
        .infoList li a:focus {
            background-color: #f0f0f0; 
        }