.intro_section {
  display: flex;
  width: 100%;
  height: 100vh;
  position: relative;
}

.intro_section > li {
  flex: 1;
  position: relative;
  overflow: hidden;
  transition: flex 0.3s ease;
  list-style: none;
}

.intro_section li .bg {
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  transition: transform 0.3s ease, filter 0.3s ease;
  filter: brightness(0.6);
}

.intro_section li:last-child .bg {
  background-position: left;
}

.intro_section li.active .bg,
.intro_section li:hover .bg {
  filter: brightness(1);
}

.intro_section li a .label {
  position: absolute;
  top: 50%;
  left: 50%;  
  transform: translate(-50%,-50%);    
}

.intro_section li a .label div {
  text-align: center;   
}

.intro_section li a .label .logo_txt {
  font-size: 32px;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: 2px;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.intro_section .bottom_icon {
  position: absolute;
  bottom: 5%;
  left: 50%;  
  transform: translateX(-50%);  
}

.intro_section .bottom_icon .family_site_icon{
  display: flex;
  gap: 30px;
}

.intro_section .bottom_icon .family_site_icon li,
.intro_section .bottom_icon .language_icon li {
  text-align: center;
}

.intro_section .bottom_icon .language_icon{
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-top: 30px;
}

@media (min-width: 769px) {
  .intro_section li a .label .logo_txt {
    white-space: nowrap;
  }
}

@media (max-width: 767px) {
  .intro_section {
    flex-wrap: wrap;
    position: relative;    
  }
  .intro_section > li {
    flex: 1 1 50%;
    height: 50vh; 
  }
  .intro_section > li .bg {
    filter: brightness(1);
  }
  .intro_section li a .label .logo_txt {
    font-size: 24px;
    margin-bottom: 6px;
    letter-spacing: 1px;
    white-space: pre-line;
  }
  .intro_section .bottom_icon {
    position: absolute;
    bottom: 5%;
    left: 50%;  
    transform: translateX(-50%);  
  }
  .intro_section .bottom_icon .family_site_icon li img{
    width: 100%;    
  }
}