css圆角梯形

.tabs-item {
  position: relative;
  width: 77px;
  height: 32px;
  line-height: 32px;
  padding: 0;
  text-align: center;
  color: #333;

  &::after {
    content: '';
    position: absolute;
    top: 4px;
    left: 7px;
    right: 6px;
    bottom: 5px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 6px 6px 0 0;
    transform: perspective(10px)scale(1.1, 1.3) rotateX(5deg);
    z-index: -1;
  }

  &.is-active {
    color: #fff;

    &::after {
      background: #1C4DBF;
      border-color: #1C4DBF;
    }
  }
}

记录进步！！！