.bu-ul {
  padding-top: 121px;
  padding-bottom: 107px;
  display: flex;
  flex-wrap: wrap;
}
.bu-ul li {
  margin-bottom: 32px;
  width: calc((100% - 72px) / 3);
  margin-right: 36px;
  padding: 64px 29px;
  background: #f8f8f8;
  border-radius: 4px 4px 4px 4px;
  border: 1px solid #dedede;
  transition: all 0.5s ease;
}
.bu-ul li:nth-child(3n) {
  margin-right: 0;
}
.bu-top {
  display: flex;
  justify-content: space-between;
  align-content: center;
  margin-bottom: 12px;
}
.bu-top h6 {
  font-size: 24px;
  color: #222222;
  line-height: 50px;
}
.bu-top img {
  width: 80px;
  height: auto;
}
.white {
  display: none;
}

/* .bu-active .white {
  display: block;
}
.bu-active .orange {
  display: none;
} */
.bu-ul p {
  color: #222222;
  line-height: 30px;
}
.bu-ul li:hover {
  background-color: #b11f23;
}
.bu-ul li:hover .white {
  display: block;
}
.bu-ul li:hover .orange {
  display: none;
}
.bu-ul li:hover p {
  color: #fff;
}
.bu-ul li:hover h6 {
  color: #fff;
}
@media screen and (max-width: 768px) {
  .bu-ul {
    padding-top: 0.38rem;
    padding-bottom: 1.07rem;
    display: flex;
   flex-direction: column;
  }
  .bu-ul li {
    margin-bottom: 0.23rem;
    width:100%;
    margin-right: 0;
    padding: 0.4rem;
    border-radius: 0.04rem;

  }

  .bu-top {
    margin-bottom: 0.23rem;
  }
  .bu-top h6 {
    font-size: 0.35rem;
    line-height: 0.73rem;
  }
  .bu-top img {
    width: 1.24rem;
    height: auto;
  }


  .bu-ul p {
    line-height: 0.5rem;
  }

}