.container {
  overflow-x: hidden;
}

.persons_banner {
  position: relative;
  width: 100vw;
  height: calc(100vw * 1 / 2);
  background-color: #272727;
}

.persons_banner > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.2);
  transition: 0.3s ease;
  transform-origin: opacity transform;
}
.persons_banner > img.active {
  opacity: 1;
  transform: scale(1);
}


.about_part {
  background-color: #000;
  padding: 80px 30px;
}
.about_box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #fff;
}
.about_part_l > h2 {
  font-size: 50px;
  margin-bottom: 20px;
}
.about_part_l > p {
  font-size: 14px;
  margin-bottom: 30px;
  letter-spacing: 2px;
}

.person_item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 150px 0;
}
.person_item:nth-child(2n) {
  /* 置换顺序位置 */
  flex-flow: row-reverse;
}

.person_item_l,
.person_item_r {
  width: 50%;
}
.person_item_l {
  display: flex;
  justify-content: start;
}
.person_item:nth-child(2n) .person_item_l {
  justify-content: end;
}

.person_item_r {
  max-width: 400px;
}

.person_item.active .person_image {
  transform: scale(2);
}

.person_image {
  /* cursor: pointer; */
  width: 40vw;
  max-width: 500px;
  max-height: 400px;
  height: calc(40vw * 4 / 5);
  overflow: hidden;
  background-color: #272727;
  /* background: #2f80af; */
  transition: 0.3s ease;
  transform-origin: background-color transform;
}

.person_image:hover {
  /* background-color: #2F80AF; */
}

.person_image > img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.person_name {
  font-size: 70px;
}

.person_des {
  font-weight: lighter;
  line-height: 40px;
  padding: 30px 0 60px 0;
}

.person_item_btn {
  position: relative;
  z-index: 2;
  cursor: pointer;
  width: 240px;
  height: 60px;
  line-height: 59px;
  background-color: #000;
  color: #ffff;
  text-align: center;
  letter-spacing: 2px;
  font-weight: 300;
  overflow: hidden;
}

.person_item_btn:hover::after {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}
.person_item_btn::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  background-color: #2ba0e3;
  transform: translate3d(-70%, 0, 0);
  transition: 0.3s ease;
  opacity: 0;
  transform-origin: transform opacity;
}

/* frames */
.person_detail_frame {
  position: fixed;
  z-index: 2;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0;
  display: none;
  transition: 0.3s ease;
  transform-origin: opacity;
  animation: show_detail 0.3s ease forwards;
}
@keyframes show_detail {
  from {
    pointer-events: none;
    opacity: 0;
  }
  to {
    pointer-events: unset;
    opacity: 1;
  }
}

/* mobile */
@media screen and (max-width: 767px) {
  .person_part {
    padding-top: 50px;
  }

  .about_box {
    flex-direction: column;
  }
  .about_part_l {
    width: 100%;
    /* margin-bottom: 50px; */
  }

  .about_part_l > h2 {
    font-size: 30px;
  }
  .about_part_l > p {
    font-size: 14px;
    margin-bottom: 14px;
  }
  .about_part_r {
    width: 100%;
  }
  .person_item {
    flex-direction: column;
    padding: 0 30px;
    padding-bottom: 120px;
  }
  .person_item:nth-child(2n) {
    /* 置换顺序位置 */
    flex-flow: unset;
    flex-direction: column;
  }
  .person_item:nth-child(2n) .person_item_l {
    justify-content: unset;
  }
  .person_item_l,
  .person_item_r {
    width: 100%;
    max-width: 100%;
  }
  .person_item_l {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
  }
  .person_image {
    width: 100vw;
    max-width: 100%;
    height: calc(90vw * 4 / 5);
  }
  .person_name {
    font-size: 40px;
  }
  .person_des {
    padding: 10px 0 20px 0;
    line-height: 40px;
    font-weight: 300;
  }
}