nav .container {
  height: 500px;
  width: 100%;
  position: relative;
  background-image: url(https://static.igem.wiki/teams/4263/wiki/images/member-images/members-allpic.jpg);
  background-size: 100% 100%;
}
nav .container .title {
  position: absolute;
  left: 50%;
  bottom: 3%;
  font-size: 30px;
  color: white;
  transform: translate(-50%, -50%) translateZ(-100px);
  font-family: fantasy;
  letter-spacing: 1px;
}
.art_title {
  display: block;
  text-align: center;
  color: #81869a;
  height: 30px;
  line-height: 30px;
  font-size: 22px;
  font-weight: bold;
  margin: 60px 0 40px;
}
.art_title::before {
  content: '';
  display: inline-block;
  width: 10px;
  height: 10px;
  background-color: #cc9085;
  border-radius: 50%;
  margin-right: 20px;
  margin-bottom: 3px;
}
.art_title::after {
  content: '';
  display: inline-block;
  width: 10px;
  height: 10px;
  background-color: #cc9085;
  border-radius: 50%;
  margin-left: 20px;
  margin-bottom: 3px;
}
article {
  margin: 0 10vw;
}
article .flex {
  display: flex;
  flex-wrap: wrap;
  width: 100%;
}
article .flex .member_pic {
  text-align: center;
  width: 25%;
  min-width: 210px;
}
article .flex .member_pic img {
  width: 200px;
  height: 200px;
  border-radius: 50%;
}
article .flex .member_pic h3 {
  margin: 20px 0;
  color: #ac475d;
  font-size: 20px;
  font-weight: 700;
}
article .flex .member_pic .p {
  padding: 5px 10px;
  text-align: left;
  font-size: 18px;
  line-height: 26px;
}
article .pi .member_pic {
  width: 50%;
}
article .pi .member_pic h3 {
  color: #000;
  font-size: 20px;
  font-weight: 700;
}
article .instructor .member_pic {
  width: 100%;
}
article .instructor .member_pic h3 {
  color: #000;
  font-size: 20px;
  font-weight: 700;
}
article .groups .motto {
  position: relative;
  overflow: hidden;
}
article .groups .motto:hover .motto_detail {
  transform: translateX(-50%) translateY(0);
}
article .groups .motto .motto_detail {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.4);
  width: 200px;
  height: 75px;
  position: absolute;
  padding: 3px 7px 10px;
  font-size: 12px;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) translateY(100%);
  transition: 0.7s;
}
article .groups .motto img {
  border-radius: 0 !important;
}