* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
ul,
ol,
li {
  list-style: none;
}
.main {
  width: 1200px;
  margin: 0 auto;
}

.ul {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}
.item {
  width: 20%;
  padding: 20px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: 1px solid transparent;
}
.item:hover {
  border: 1px solid red;
}
.item img {
  width: 198px;
  height: 198px;
}
.mess {
  font-family: PingFangSC-Regular;
  font-size: 14px;
  color: #9b9b9b;
  line-height: 20px;
  margin: 10px 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  white-space: wrap;
  text-overflow: ellipsis;
}
.price {
  color: red;
  font-size: 20px;
}
.kf {
  padding: 12px 6px;
  width: 30px;
  color: #fff;
  background-color: #2f54ad;
  text-align: center;
  font-size: 16px;
  position: fixed;
  top: 50%;
  right: 100px;
  transform: translateY(-50%);
  border-radius: 8px;
  cursor: pointer;
}
@media screen and (max-width:750px){
    .main{
        /*width: 100%;*/
    }
}