#bigbox {
  width: 100vw;
  height: 100vh;
  overflow-x: hidden;
  background: #f2f2f4;
}

#bigbox .top {
  height: 18rem;
  width: 100%;
  background: url(../img/teach-bg.png) no-repeat center center;
  background-size: 100% 100%;
  margin-top: 4rem;
}

#bigbox .mainbox {
  width: 88%;
  height: auto;
  margin: 1rem auto;
}

#bigbox .mainbox .itembox {
  height: auto;
  padding: 1rem;
  background: white;
  border-radius: 1rem;
  margin-bottom: 1.5rem;
}

#bigbox .mainbox .itembox .title {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

#bigbox .mainbox .itembox .title .name {
  font-size: 1.35rem;
  font-weight: bold;
}

#bigbox .mainbox .itembox .title .more {
  font-size: 1.1rem;
  color: #777778;
}

#bigbox .mainbox .itembox .listbox {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 2rem;
}

#bigbox .mainbox .itembox .listbox .item {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 48%;
  margin-right: 1%;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

#bigbox .mainbox .itembox .listbox .item .pic {
  width: 100%;
  height: 8rem;
}

#bigbox .mainbox .itembox .listbox .item .text {
  text-align: center;
  margin: 1rem 0;
  font-size: 1.2rem;
}