nav {
  margin: 0 -50px 0;
  padding-left: 5rem;
  position: relative;
  max-height: 100%;
  background-color: #eeedeb;
  box-sizing: border-box;
  /* top: 50px; */
}

nav img {
  max-height: 3rem;
}

.menu-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  flex: 1;
  box-sizing: border-box;
}

.menu-item {
  box-sizing: border-box;
  position: relative;
  margin-left: 3rem;
  font-size: larger;
  font-weight: bolder;
  text-align: center;
  transition: all 0.3s ease; /* 让 hover 边框出现更平滑 */
}

.menu-item:first-child {
  margin-left: 0; /* 第一个菜单项左对齐 */
}

.menu-item a,
.menu-item span {
  display: inline-block;
  padding: 1rem 0;
  line-height: 3rem;
  font-size: 1rem;
  color: white;
  cursor: pointer;
}

.menu-item:not(:first-child):hover {
  border-bottom: #7de9a4d1 solid 2px;
}

@media screen and (max-width: 768px) {
  nav,#preview,#Culture img {
    display: none;
  }
  #banner > div,#Culture{
    width: unset;
    height: unset;
  }
  #preview .preview-active{
    display: none;
  }

}