.lan_xl {
  display: flex;
  justify-content: center;
  padding: 100px 0;
  height: 1080px;
  /* background: url(../img/taojian1/bj/bj_1.jpg); */
}

.lan_xl_box {
  width: 650px;
  height: 800px;
  display: flex;
  /* justify-content: center; */
  align-items: center;
  flex-direction: column;
  justify-content: space-around;
  border: 2px black solid;
}

.lan_xl_box div {
  background-color: rgba(241, 241, 241, 0.5);
}


.lan_xl_box img {
  width: 505px;
  height: 205px;
  cursor: pointer;
}

/* 导航栏 */
#navbar-collapse ul li a:hover {
  color: red !important;
}

.navbar-brand {
  width: 200px;
  height: 78px;
  overflow: hidden;
}

.navbar-brand img {
  margin-bottom: 50px;
}