el-dialog居中对齐

    /deep/ .el-dialog {
        display: flex;
        flex-direction: column;
        margin: 0 !important;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        max-height: calc(100% - 30px);
        max- calc(100% - 30px);
        .el-dialog__body {
            padding: 30px 25px;
            height: 800px;
            flex: 1;
            overflow: auto;
        }
    }