message: [improvement] Card: add origin-price prop
diff: &,
  &__thumb,
  - &__row {
  + &__row,
  + &__content {
  display: flex;
  }
  max-height: 20px;
  }
  - &__price,
  - &__num {
  + &__left {
  flex: 1;
  - min-width: 80px;
  + }
  +
  + &__right {
  + flex-shrink: 0;
  line-height: 20px;
  + padding-left: 10px;
  text-align: right;
  }
  + &__origin-price {
  + color: $gray-darker;
  + text-decoration: line-through;
  + }
  +
  &__num {
  color: $gray-darker;
  }
  &__footer {
  right: 15px;
  - bottom: 5px;
  + bottom: 8px;
  position: absolute;
  .van-button {
  