.part_one {
  min-height: 70vh;
  padding-top: 150px;
  overflow-x: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.part_title {
  font-size: 70px;
  padding-bottom: 40px;
}
.part_item {
  position: relative;
  padding: 25px 0;
}
.part_item>a{
  display: block;
  color: #000;
}
.contact_title {
  display: inline-block;
  margin-bottom: 35px;
  padding-bottom: 2px;
  border-bottom: 4px solid #000;
}
.contact_box {
  position: relative;
  display: flex;
  align-items: center;
}
.contact_item {
  position: relative;
  z-index: 1;
  width: 48px;
  height: 48px;
  min-width: 48px;
  border-radius: 50%;
  padding: 12px;
  border: #000 2px solid;
  margin-right: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background-color: #fff;
  transition: 0.3s ease;
  transform-origin: background-color filter;
}
.contact_item:hover {
  background-color: #000;
}
.contact_item:hover > img {
  filter: brightness(5);
}
.wechat_item:hover .contact_qr_box {
  opacity: 1;
}
.contact_qr_box {
  pointer-events: none;
  position: absolute;
  left: 50px;
  z-index: 1;
  top: 0;
  width: 150px;
  height: 150px;
  min-width: 150px;
  background-color: #000000;
  padding: 10px;
  opacity: 0;
  transition: 0.3s ease;
  transform-origin: opacity;
}
.contact_qr_box > img {
  width: 100%;
  height: 100%;
}

.contact_item > img {
  width: 100%;
  height: 100%;
}

.contact_address {
  display: flex;
  align-items: center;
  padding-bottom: 20px;
}
.contact_address > img {
  width: 30px;
  height: 30px;
  min-width: 30px;
  padding-bottom: 5px;
}

.map_box {
  position: relative;
  width: 45vw;
  min-width: 400px;
  min-height: 300px;
  max-width: 700px;
  max-height: 550px;
  height: calc(45vw * 3 / 4);
}
.contact_map {
  position: relative;
  width: 100%;
  height: 100%;
  opacity: 0.5;
  transition: opacity 0.3s ease;
}
.contact_map:hover {
  opacity: 1;
}
.contact_map_arrow {
  position: absolute;
  pointer-events: none;
  width: 20vw;
  min-width: 200px;
  min-height: 100px;
  max-width: 260px;
  max-height: 130px;
  height: calc(20vw * 1 / 2);
  top: 56%;
  left: 35%;
  transform: translate(-50%, -50%);
}

.part_two {
  display: flex;
  justify-content: space-around;
}
.enter_box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  width: 100%;
  padding: 120px 0;
  color: #fff;
  letter-spacing: 3px;
  cursor: pointer;

  will-change: transform;
  transition: 0.3s ease;
  transform-origin: transform;
}
.enter_box.active {
  z-index: 2;
  transform: scale(3);
}
.enter_box > p {
  font-size: 30px;
  font-weight: 300;
}
.enter_box_one {
  background-color: #2ba0e3;
}
.enter_box_two {
  background-color: #000000;
}

.enter_title {
  display: flex;
  align-items: center;
  padding-bottom: 10px;
}
.enter_title > h2,
.enter_title > p {
  font-size: 40px;
  font-weight: 300;
}

.enter_box:hover .is_enter {
  opacity: 1;
  transform: translate3d(5px, -5px, 0) rotate(10deg);
}
.is_enter {
  opacity: 0;
  transition: 0.3s ease;
  transform-origin: opacity transform;
}

/* frame */
.contact_frame {
  position: fixed;
  z-index: 99;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: none;
}
.contact_frame.active {
  display: block;
  animation: show_frame 0.3s ease;
}
@keyframes show_frame {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

/* mobile */
@media screen and (max-width: 767px) {
  .part_title {
    font-size: 34px;
  }

  .part_one {
    flex-direction: column;
    padding: 0 30px;
    padding-top: 45px;
  }
  .part_title {
    padding-bottom: 15px;
  }
  .left_part {
    width: 100%;
  }
  .contact_map {
    opacity: 1;
  }
  .part_two {
    flex-direction: column;
  }

  .enter_box {
    padding: 30px 0;
  }
  .enter_title > h2,
  .enter_title > p {
    font-size: 24px;
  }
  .enter_box > p {
    font-size: 18px;
  }
  .contact_qr_box {
    top: 50px;
    left: -5px;
  }
}