<!-- 主营品牌css -->
   <style>
    .brand .bd {
      position: relative;
      width: 100%;
      overflow: hidden;
      margin: 0 auto; /* 居中显示 */
    }
    .brand .bd ul {
      list-style: none;
      margin: 0;
      padding: 0;
      display: flex;
      transition: transform 0.3s ease;
    }
    .brand .bd li {
      flex: 0 0 25%; /* 一次性显示4张图片 */
      margin-right: 10px;
    }
    .brand .bd .img img {
      width: 100%;
      height: auto;
    }
    /*主营品牌*/
      #brand{ width:100%; height:445px;}
      #brand .brand{ width:1120px; margin:auto; height:445px;}
      #brand .brand .title{ width:100%;height:70px; margin-bottom:40px;margin-top:50px; }
      #brand .brand .title h1{ width:100%; text-align:center; height:40px; line-height:40px;font-size:22px; color:#103d87;  }
      #brand .brand .title h1 font{ display:inline-block; height:40px; border-bottom:1px solid #569cdc;}
      #brand .brand .title span{ display:block;width:100%; height:30px; line-height:30px; text-align:center; font-size:16px; color:#b8b8b8; }


<!-- 控制左侧菜单栏展示收缩css -->

    .sub-category {
      display: none;
    }
    .category {
      user-select: none;
      pointer-events: none;
    }
</style>