.icongrade {
  display: inline-block;
  width: 0.875rem;
  height: 0.875rem;
}

.icongrade::before {
  content: "";
  display: inline-block;
  width: 0.875rem;
  height: 0.875rem;
  /* vertical-align: top; */
  background: url(//s.autoimg.cn/mass/img/icongrade.png) no-repeat;
  background-size: 0.875rem auto;
}

.icongrade-v1::before {
  background-position: 0 0;
}

.icongrade-v2::before {
  background-position: 0 -0.9375rem;
}

.icongrade-v3::before {
  background-position: 0 -1.875rem;
}

.right-bottom{
  position: absolute;
  bottom: .1rem;
  right: .1rem;
}