.page {
  width: 100vw;
  height: auto;
  padding-top: 8em !important;
  background-color: #f5f5f5;
  overflow: hidden;
}
@media (max-width: 768px) {
  .page {
    height: auto;
    padding-top: 1rem !important;
  }
  .ISD::before {
    right: 0 !important;
  }
}

#CN,
#EN {
  font-size: 1rem;
  color: #000;
  cursor: pointer;
}
#join-us {
  width: 2.5rem;
  height: 1.5rem;
  font-size: 1.5em;
  font-weight: bold;
  color: #fff;
  cursor: pointer;
  min-height: 0;
}
#mimicry {
  width: 0;
  height: calc(100vh - 8rem);
  position: absolute;
  top: 8em;
  right: 0;
  bottom: 0;
  transform: translateX(0);
  transform-origin: right center;
  animation: transform 1s ease-in-out, width 1s ease-in-out;
  z-index: 998;
}
.mimicry_maskLayer {
  width: 80%;
  height: 100%;
  z-index: 999;
  position: absolute;
  top: 0;
  left: 0;
}
.mimicry_menu {
  pointer-events: auto;
  position: absolute;
  display: none;
  top: 0;
  right: 0;
  width: 20%;
  height: 100%;
  z-index: 999;
  background-color: rgba(255, 255, 255, 0.8);
  padding: 3em 4em;
}
.mimicry_menu .mimicry_menu-list {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: flex-start;
  gap: 1em;
  font-size: 1.2em;
}
.mimicry_menu .mimicry_menu-list .mimicry_menu-item {
  width: 100%;
  color: #000;
  cursor: pointer;
}
.mimicry_menu-item-info {
  width: 100%;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  gap: 0.5em;
}
.mimicry_menu-item a {
  text-decoration: none;
  color: #000;
}
.mimicry_menu-item-plus {
  font-size: 1em;
  color: #000;
  cursor: pointer;
}
.mimicry_menu-item .item-mimicry_menu-list {
  display: none;
  height: 0;
  padding-left: 1em;
  transition: height 0.5s ease-in-out;
  font-size: 1em;
}
.mimicry_menu-item.active .item-mimicry_menu-list {
  display: flex !important;
  height: 100% !important;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: flex-start;
  gap: 1em;
  font-size: 0.9em;
  padding: 1em;
}
@media (max-width: 768px) {
  .mimicry_menu {
    width: 100%;
  }
}
.active-lang {
  color: #fff !important;
  background-color: #c875f0;
  border-radius: 50%;
  line-height: 2em;
  text-align: center;
  padding: 0.5em;
  box-shadow: 0 0 0.2em rgba(0, 0, 0, 0.5);
  transform: scale(1.2);
}

.ISD {
  position: relative;
}
.ISD::before {
  content: '';
  position: absolute;
  top: 70%;
  right: 6em;
  transform: translateX(-2em) translateY(-50%);
  height: 20em;
  width: 10em;
  background-image: url(../img/ISD.png);
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center center;
  z-index: 0;
}
#discover {
  background-image: url(../img/discover.png);
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center center;
}
#cooperation {
  background-image: url(../img/cooperation.png);
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center center;
}
#page-operate {
  position: fixed;
  top: 50%;
  right: 0.5em;
  transform: translateY(-50%);
  z-index: 990;
  display: flex;
  flex-direction: column;
  gap: 1em;
}
#cooperation,
#discover {
  width: 4em;
  height: 4em;
  opacity: 0.8;
  cursor: pointer;
  z-index: 1000;
  border-radius: 50%;
  box-shadow: 0px 4px 6px -4px rgba(0, 0, 0, 0.1),
    0px 10px 15px -3px rgba(0, 0, 0, 0.1);
  position: relative;
}
#cooperation .ac,
#discover .ac {
  opacity: 0;
  pointer-events: none;
  padding: 0.5rem 1rem;
  transition: opacity 0.3s ease-in-out;
  position: absolute;
  top: 50%;
  left: -6.5rem;
  transform: translateY(-50%);
  width: 6rem;
  text-align: center;
  font-size: 1rem;
  font-weight: bold;
  color: #000;
  background-color: #fff;
  border-radius: 0.5rem;
  filter: drop-shadow(2px 3px 6px rgba(0, 0, 0, 0.3));
  display: flex;
  justify-content: center;
  align-items: center;
}

#cooperation:hover .ac,
#discover:hover .ac {
  opacity: 1;
  pointer-events: auto;
}

.ac::after {
  content: '';
  position: absolute;
  top: 50%;
  right: -0.1rem;
  width: 1rem;
  height: 1rem;
  background-color: #fff;
  transform: translateY(-50%) rotate(45deg);
}
#bottom-hint {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  color: #000;
  padding: 10px 20px;
  border-radius: 25px;
  font-size: 14px;
  z-index: 9999;
  opacity: 0;
  transition: opacity 0.3s ease;
}