.v-button-group {

  //水平的
  &.v-button-group-horizontal {

    display: inline-flex;
    flex-flow: row nowrap;

    .v-button:first-child {
      border-top-right-radius: 0;
      border-bottom-right-radius: 0;
    }

    .v-button:not(:first-child):not(:last-child) {
      border-radius: 0;
      margin-left: -1px;
    }

    .v-button:last-child {
      border-top-left-radius: 0;
      border-bottom-left-radius: 0;
      margin-left: -1px;
    }
  }

  //竖直的
  &.v-button-group-vertical {

    display: inline-flex;
    flex-flow: column nowrap;

    .v-button:first-child {
      border-bottom-left-radius: 0;
      border-bottom-right-radius: 0;
    }

    .v-button:not(:first-child):not(:last-child) {
      border-radius: 0;
      margin-top: -1px;
    }

    .v-button:last-child {
      border-top-left-radius: 0;
      border-top-right-radius: 0;
      margin-top: -1px;
    }
  }
}