#app {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 50px 30px; 
  }
  .modal-mask {
    background-color: rgba(0,0,0,.5);
    display: flex;
    height: 100%;
    justify-content: center;
    left: 0;
    padding-top: 216px;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 998;
  }
  .modal-mask .preferential {
    border: 2px solid #d5d5d5;
    border-radius: 22px;
    box-sizing: border-box;
    display: flex;
    height: 530px;
    overflow: hidden;
    position: relative;
    width: 913px;
  }
  .modal-mask .preferential .modal-close {
    background-image: url('./perferential-close.png');
    background-repeat: no-repeat;
    background-size: contain;
    background-color: unset;
    height: 35px;
    position: absolute;
    right: 20px;
    top: 12px;
    transition: all .3s;
    width: 35px;
    z-index: 1;
    cursor: pointer;
  }
  .modal-mask .preferential .modal-left {
    background-image: linear-gradient(90deg,#eaeaea, #f3f3f3,#fefefe);
    border-radius: 22px 0 0 22px;
    border-right: 1px solid #d5d5d5;
    height: 100%;
    position: relative;
    width: 223px;
  }
  .modal-mask .preferential .modal-left .modal-tabs {
    display: block;
  }
  .modal-mask .preferential .modal-left .modal-tabs .modal-tab:first-child.active,
  .modal-mask .preferential .modal-left .modal-tabs .modal-tab:first-child {
    border-radius: 16px 0 0 0;
  }
  .modal-mask .preferential .modal-left .modal-tabs .modal-tab:hover {
    background-image: linear-gradient(90deg,#8E8E8E,#9D9D9D,#BEBEBE);
    color: #ffffff;
    opacity: 1;
  }
  .modal-mask .preferential .modal-left .modal-tabs .modal-tab {
    word-wrap: break-word;
    border-bottom: 1px solid #d5d5d5;
    cursor: pointer;
    padding: 19px 30px;
    transition: all .3s ease;
    font-weight: 700;
    color: #565656;
    float: unset;
  }
  .modal-mask .preferential .modal-left .modal-tabs .modal-tab.active {
    background-image: linear-gradient(90deg,#373737, #5c5c5c,#7c7c7c);
    color: #ffffff;
    opacity: 1;
  }
  .modal-mask .preferential .modal-right {
    border-radius: 0 22px 22px 0;
    height: 100%;
    overflow: hidden;
    width: calc(100% - 223px);
    overflow-y: auto;
  }
  .modal-mask .preferential .modal-right #messageContextDiv {
    max-width: 610px;
    padding: 10px;
  }
  .modal-mask .preferential .modal-right #messageContextDiv img {
    width: 100%;
  }
  .modal-mask .preferential .modal-right #messageContextDiv #messageContext p {
    word-break: break-word;
  }
  .modal-mask .preferential .modal-right .img-list {
    height: 100%;
    transition: all .3s;
    background: url('./bg.jpg');
    padding: 40px;
    display: flex;
    flex-direction: column;
    gap: 20px;
  }
  .modal-mask .preferential .modal-right .img-list .item {
    overflow: hidden;
  }
  .el-scrollbar:hover .el-scrollbar::-webkit-scrollbar {
    opacity: 1;
  }
  .el-scrollbar::-webkit-scrollbar-thumb {
    width: 4px;
    background-color: #bbbbbb;
  }
  .el-scrollbar::-webkit-scrollbar {
    width: 6px;
    height: 8px;
    background-color: #ffff;
    opacity: 0;
  }
  .el-scrollbar {
    overflow: scroll;
    overflow-x: hidden;
  }
  .el-scrollbar__bar {
    opacity: 0;
    transition: opacity .2s;
  }
  .el-scrollbar .el-scrollbar__wrap {
    overflow-x: hidden;
  }
  .el-scrollbar .el-scrollbar__bar.is-horizontal {
    display: none;
  }