.factor {
  width: 100%;
  background: #F3F7FC;
}
.factor .inner {
  width: 80%;
  margin: 0 auto;
  max-width: 1440px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  padding-top: 47px;
}
.factor .inner .factor-item {
  border-radius: 12px;
  background: #bbbbbb;
  width: calc((100% - 20px) / 4);
  overflow: hidden;
  margin-bottom: 27px;
}
.factor .inner .factor-item:nth-child(-n+2) {
  width: calc((100% - 40px) / 2);
}
.factor .inner .factor-item:nth-child(n+3):nth-child(-n+5) {
  width: calc((100% - 60px) / 3);
}
.factor .inner .factor-item .imgHover {
  width: 100%;
  height: 100%;
  display: block;
}
.factor .inner .factor-item .imgHover img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1);
  transition: 0.5s;
}
.factor .inner .factor-item .imgHover:hover img {
  transform: scale(1.05);
}
@media screen and (max-width: 1280px) {
  .factor .inner .factor-item {
    width: calc((100% - 60px) / 3);
  }
  .factor .inner .factor-item:nth-child(-n+2) {
    width: calc((100% - 60px) / 3);
  }
  .factor .inner .factor-item:nth-child(n+3):nth-child(-n+5) {
    width: calc((100% - 60px) / 3);
  }
  .factor .inner .factor-item .imgHover {
    width: 100%;
    height: 250px;
  }
}
@media screen and (max-width: 1025px) {
  .factor .inner .factor-item {
    width: calc((100% - 30px) / 2);
  }
  .factor .inner .factor-item:nth-child(-n+2) {
    width: calc((100% - 30px) / 2);
  }
  .factor .inner .factor-item:nth-child(n+3):nth-child(-n+5) {
    width: calc((100% - 30px) / 2);
  }
  .factor .inner .factor-item .imgHover {
    width: 100%;
    height: 250px;
  }
}
@media screen and (max-width: 900px) {
  .factor .inner {
    width: 90%;
  }
}
@media screen and (max-width: 641px) {
  .factor .inner .factor-item {
    width: 100%;
  }
  .factor .inner .factor-item:nth-child(-n+2) {
    width: 100%;
  }
  .factor .inner .factor-item:nth-child(n+3):nth-child(-n+5) {
    width: 100%;
  }
  .factor .inner .factor-item .imgHover {
    width: 100%;
    height: 350px;
  }
}