element-ui/examples/demo-styles/card.scss

.demo-block.demo-card {
  .text {
    font-size: 14px;
  }

  .time {
    font-size: 13px;
    color: #999;
  }

  .bottom {
    margin-top: 13px;
    line-height: 12px;
  }

  .item {
    margin-bottom: 18px;
  }

  .button {
    padding: 0;
    float: right;
  }

  .image {
    width: 100%;
    display: block;
  }

  .box-card {
    width: 480px;
  }
}