让 el-dialog 居中，并且内容多的时候内部可以滚动

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---

.el-dialog {
    position: absolute;
    top: 50%;
    left: 50%;
    margin: 0 !important;
    transform: translate(-50%, -50%);
    max-height: calc(100% - 30px);
    max-width: calc(100% - 30px);
    display: flex;
    flex-direction: column;
}

.el-dialog__body {
    overflow: auto;
}