header {
  margin: 0;
  padding: 0;
  width: 100%;
  text-align: center;
}

#header-ghg_logo {
  margin-top: var(--base-spacing-height);
  text-align: center;
}

#header-ghg_logo:hover {
  opacity: 0.7;
}

#header-sustainability_logo {
  margin-top: calc(var(--base-spacing-height)*2/3);
  text-align: center;
}

#gnav {
  position: relative;
  width: 100%;
  text-align: center;
  padding: 0;
  z-index: 1;
  margin-top: calc(var(--base-spacing-height)*2/3);;
}

#gnav.fixed {
  position: fixed;
  top: calc(var(--base-spacing-height)*2/3) !important;
  left: 0 !important;
//  z-index: 1000;
  animation: none;
  opacity: 0.9;
  z-index: 2;

  /* heroエリアに重ねた分をリセット */
//  margin-top: 0;
//  margin-bottom: 0;
}

#gnav.bounce {
  animation: bounceIn 0.5s ease;
}

#gnav-list {
  width: calc(var(--base-page-width) + var(--base-spacing-width)*2);
  margin: 0 auto;
  padding: 0;
  height: 60px;
  background-color: var(--base-color-primary);
  border-radius: var(--base-border-radius);
  line-height: 1.5em;
  display: flex;
  justify-content: center;
  align-items: center;
}

#gnav.bounce #gnav-list {
}

.gnav-item {
  display: inline-block;
}

.gnav-link {
  display: inline-block;
  height: 1em;
  width: auto;
  margin: 0 1em;
  line-height: 1em;
  font-style: normal;
  color: var(--base-color-white);
  font-size: var(--base-font-size);
  text-decoration: none;
}

.gnav-link:not(.deactive):hover {
  text-decoration: underline;
}

.gnav-link.deactive {
  opacity: 0.3;
}

main {
  margin: calc(var(--base-spacing-height)*4/3) auto 0 auto;
  text-align: center;
  width: var(--base-page-width);
}

#main-title {
  font-size: calc(var(--base-font-size)*1.5);
}