@media screen and (max-width: 768px) {
  .pc{
    display: none;
  }

  .sp {
    display: inline;
    width: 100%;
  }

  .three-column-grid-section {
    grid-template-columns: 1fr; 
  }


  .text-content {
    width: 90%;
}

  .logo {
    margin-top: 0px;
    margin-bottom: 85px;
  }

  .image-text-section {
    display: block;
    width: 90%;
  }

  .image-column{
    text-align: center;
  }

  .image-column img {
    width: 100%;
    height: auto;
    margin-top: 100px;
  }

  .header img.side-image {
    width: 65%;
    height: auto;
    animation-delay: 1s;
  }

  .text-column {
    width: 100%;
    padding-left: 0px;
  }

  .text-column h2 {
    margin-bottom: 0.5em;
    text-align: center;
  }

  .hamburger-menu {
    display: block;
    text-align: end;
    margin-right: 10px;
    margin-bottom: 10px;
    font-size: 25px;
  }

  .sticky-header nav ul {
    display: none; 
    flex-direction: column; 
  }

  .sticky-header nav ul li {
    margin-right: 0; 
  }

  
  .sticky-header nav ul.show {
    display: flex;
  }

  
.dropdown-content {
  display: none;
  position: static; 
}


.dropdown-content.show {
  display: block;
}

.sticky-header {
  position: fixed;
  top: 0;
  right: 0;
  width: 50%;
  background: #51505000;
  color: white;
  z-index: 1000;
}

.sticky-header nav ul {
  margin-right: 0px;
  text-align: start;
}

.hamburger-menu.open {
  content: '\00D7'; 
}


.sticky-header.transparent {
  background: transparent;
}
.section img {
  width: 96%;
  margin-top: 0px;
  margin-bottom: 0px;
}

.bg-image-pc {
  display: none;
}

.bg-image-sp {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('../img/pld/head.png');
  background-size: cover;
  background-position: 88% 12%;
  opacity: 0;
  animation: fadeIn 2s ease-in forwards;
  animation-delay: 2.5s; 
}

.three-column-grid-section {
  width: 80%;
  }
  .text-section p {
    width: 100%;
  }

  .link_box {
    margin: 0 auto;
}

}