._left{

    position: relative;

    margin-top: 40rpx;

    width: 40%;

    height: 350rpx;

    border-radius: 12rpx;

    text-align: center;

    font-size: 26rpx;

    background-color: #FCF2D7;

    color: #9F7F43;

    border: 2rpx solid #FFC11B;

   }

._left:before{

  content: '';

  display: inline-block;

  position: absolute;

  right: 0;

  top: 0;

  width: 0;

  height: 0;

  border-top: 28px solid #FBCF6B;

  border-left: 28px solid transparent; 

  }

._left:after{

    content: '';

    position: absolute;

    right: 1px;

    top: 5px;

    width: 8px;

    height: 4px;

    display: inline-block;

    border: 1px solid #fff;

    border-width: 0 0 1px 1px;

    transform: rotate(-45deg);

    -ms-transform: rotate(-45deg);

    -moz-transform: rotate(-45deg);

    -webkit-transform: rotate(-45deg);

    -o-transform: rotate(-45deg);

    vertical-align: baseline;

  }