.cu-textarea {
  .tip {
    position: absolute;
    right: 0;
    bottom: 5px;
  }
  .bg {
    position: relative;
    width: 100%;
    border-radius: 12px;
    overflow: auto;
    box-sizing: border-box;
    border: 1px solid #eee;
  }
  textarea {
    line-height: 1.2em;
    flex: 1;
    font-size: 28px;
    padding: 0;
    box-sizing: border-box;
    display: inline-block;
    vertical-align: top;
    .placeholder {
      color: transparent;
    }
    &::after {
      content: attr(data-placeholder);
      color: gray;
      position: absolute;
      top: 0;
      left: 0;
      pointer-events: none;
      transition: 0.2s;
      opacity: 1;
    }
    &.value {
      &::after {
        opacity: 0;
      }
    }
    &[disabled],
    &[disabled] .placeholder {
      color: transparent;
    }
  }
}