#hamburger {
  position: fixed;
  top: 2vw;
  right: 2vw;
  z-index: 101;
  cursor: pointer;
  border-radius: 50%;
  width: 5vw;
  height: auto;
  margin: 0;
}
#hamburger:hover {
  transform: scale(1.1);
}
#hamburger:active {
  transform: scale(1);
}
.corner-circle {
  position: fixed;
  width: 0;
  height: 0;
  background: #2E0000;
  z-index: 101;
  opacity: 1;
  pointer-events: none;
  transition: width 3s cubic-bezier(.4,2,.6,1), height 3s cubic-bezier(.4,2,.6,1);
}
#circle-tl {
  top: -20vw; left: -10vw;
  border-bottom-right-radius: 150vw 150vh;
}
#circle-tr {
  top: -20vw; right: -10vw;
  border-bottom-left-radius: 150vw 150vh;
}
#circle-bl {
  bottom: -20vw; left: -10vw;
  border-top-right-radius: 150vw 150vh;
}
#circle-br {
  bottom: -20vw; right: -10vw;
  border-top-left-radius: 150vw 150vh;
}
.corner-circle.expand {
  width: 80vw;
  height: 80vw;
}
@media (max-aspect-ratio: 1/1) {
  .corner-circle.expand {
    width: 120vh;
    height: 120vh;
  }
}
#close-corner {
  position: fixed;
  top: 2vw;
  right: 2vw;
  z-index: 200;
  font-size: 3vw;
  color: white;
  width: 4vw;
  height: 4vw;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: opacity 0.3s;
}
#close-corner:hover {
  transform: scale(1.2);
  transition: transform 0.2s;
}
body.show-dropdown .home-dropdown-title {
  display: block;
}
.home-dropdown-title {
  position: relative;
  display: none;
  z-index: 200;
  font-size: 4vw;
  color: #fff;
  text-align: center;
  font-family: 'Fugaz One', sans-serif;
  pointer-events: auto;
  letter-spacing: 0.1vw;
  margin: 1vw 0;
  cursor: pointer;
  transition: transform 1s cubic-bezier(.4,2,.6,1);
}
#dropdown-Home::after {
  content: none;
}
.home-dropdown-title::after {
  content: " ❯";
  font-size: 3vw;
}
.home-dropdown-title:hover {
  transform: scale(1.2);
  transition: transform 0.5s;
}
.home-dropdown-title.selected {
  position: relative;
  transform: none;
  font-size: 4vw;
  z-index: 201;
  color: #fff;
  background: rgba(46,0,0,0.85);
  padding: 0.5vw 2vw;
  border-radius: 1vw;
  box-shadow: 0 0.5vw 2vw rgba(0,0,0,0.08);
  transition: all 1.5s;
  pointer-events: auto;
}
.home-dropdown-title.selected::before {
  content: "❮ ";
  font-size: 3vw;
}
.home-dropdown-title.selected::after {
  content: none;
}
.home-dropdown-title.hide {
  display: none !important;
}
.home-dropdown-title, .home-dropdown-title a {
  font-weight: normal;
}
#dropdown-Home {
  position: fixed;
  top: 5vh;
  left: 43vw;
  text-decoration: none;
}
#dropdown-Team {
  position: fixed;
  top: 20vh;
  left: 43vw;
}
#dropdown-Project {
  position: fixed;
  top: 35vh;
  left: 41vw;
}
#dropdown-Labwork {
  position: fixed;
  top: 50vh;
  left: 40vw;
}
#dropdown-Humanpractice {
  position: fixed;
  top: 65vh;
  left: 32.5vw;
}
.home-dropdown-title#dropdown-Humanpractice.selected ~ #circle-br-corner #circle-br-content {
  left: 50%;
}
#dropdown-Award {
  position: fixed;
  top: 80vh;
  left: 42vw;
}
.dropdown-Team-content,
.dropdown-Project-content,
.dropdown-Labwork-content,
.dropdown-Humanpractice-content,
.dropdown-Award-content {
  display: none;
  font-weight: 500;
}
.dropdown-Labwork-content {
  line-height: 1.3;
}
#circle-br-corner {
  display: block;
  position: fixed;
  right: -10vw;
  bottom: -20vw;
  width: 70vw;
  height: 60vw;
  background: #F3E1C9;
  border-radius: 50%;
  z-index: 300;
  transition: opacity 1s;
  opacity: 0;
  pointer-events: none;
}
#circle-br-corner.show {
  opacity: 1;
}
#circle-br-content {
  position: absolute;
  left: 60%;
  top: 40%;
  transform: translate(-50%, -50%);
  color: #62412A;
  font-size: 4vw;
  text-align: left;
  width: 80%;
  pointer-events: auto;
}
#circle-br-content a {
  display: block;
  cursor: pointer;
  color: #62412A;
  text-decoration: none;
  margin: -1vw 0;
}
#circle-br-content a:hover {
  transform: scale(1.1);
}
.home-content {
  display: flex;
  flex-direction: column; /* 直向排列 */
  margin-top: 0vw;
}
.home-content img {
  display: block;
  margin: 0;
  padding: 0;
  width: 100vw;
  height: auto;
}