.main_banner {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    background: #121212;
  }
    /* モバイル対応 */
    @media (max-width: 768px) {
        .main_banner {
            height: 80vh;
        }
      }
  .three-container {
    position: relative;
    width: 100%;
    height: 100%;
  }
  
  #three-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100% !important;
    height: 100% !important;
    z-index: 1;
    display: block;
  }
  
  .hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
  }
  
  .hero-content {
    z-index: 3;
    display: flex;
    justify-content: center;
  
  }
  .hero-content .logo{
    width: 150px;
  }
  @media (max-width: 768px) {
  .hero-content .logo{
    width: 100px;
  }
}