表中的圆角

table {
  border-spacing: 0;
  width: 50%;
  font-family: Proxima Nova, Arial;
}

.h1 {
  /*Head cell red*/
  text-align: center;
  border: 1px solid #D81541;
  border-radius: 20px 20px 0px 0px;
  background-color: #D81541;
  color: white;
  font-size: 1.5em;
  font-weight: bold;
  width: 60%;
}

.td1 {
  /*right column cells*/
  border: 1px solid #6D6E70;
  text-align: left;
  width: 60%;
}

.td2 {
  /*left column cells bold*/
  border-bottom: 1px solid #6D6E70;
  border-top: 1px solid #6D6E70;
  font-weight: bold;
  vertical-align: top;
}

.td3 {
  /*last cell right column*/
  border: 1px solid #6D6E70;
  border-radius: 0px 0px 20px 20px;
  text-align: left;
  width: 60%;
}

.td4 {
  /*last cell left column*/
  vertical-align: top;
  font-weight: bold;
  border-top: 1px solid #6D6E70;
}
.td5 {
  /*left column  first cells*/
  border-bottom: 1px solid #6D6E70;
  font-weight: bold;
  vertical-align: top;
}

<table>
  <tr>
    <td class="td5"></td>
    <td class="h1">My top corners should be round</td>
  </tr>
  <tr>
    <td class="td2">bla</td>
    <td class="td1">blabla</td>
  </tr>
  <tr>
    <td class="td4">last row</td>
    <td class="td3">my bottom corners should be round</td>
  </tr>
</table>