.header {
  position: fixed;
  width: 100%;
  background-color: #fff;
  z-index: 1000;
  line-height: 1;
}

.header-inner {
  position: relative;
  z-index: 15;
}

.header-logo {
  text-align: center;
  margin: 47px auto 35px auto;
  width: 174px;
  height: 26px;
}

.header-logo img{
  height: auto;
  width: 100%;
}

@media screen and (max-width: 960px) {
  .header-logo {
    margin: 30px 0;
    text-align: center;
  }
}

.header-links {
  display: flex;
  justify-content: center;
  margin: 0 0 47px 0;
  list-style: none;
}

@media screen and (max-width: 960px) {
  .header-links {
    display: none;
  }
}

.header-links-item {
  position: relative;
  margin: 0 30px 0 30px;
}

.header-links-item:first-child {
  margin: 0 40px 0 0;
}

.header-links-item:nth-child(2) {
  margin: 0 43px 0 30px;
}

.header-links-item:nth-child(5) {
  margin: 0 48px 0 30px;
}

.header-links-item:last-child {
  margin: 0 0 0 30px;
}

#philosophy {
  scroll-margin-top: 250px;
}
@media screen and (max-width: 960px) {
  #philosophy {
    scroll-margin-top: 120px;
  }
}

.header-links-item a {
  color: #000;
  text-decoration: none;
}

.header-links-item::after {
  content: "";
  display: inline-block;
  position: absolute;
  width: 1px;
  height: 30px;
  margin-left: 30px;
  top: 50%;
  transform: translateY(-50%);
  background-color: #BCBCBC;
}

.header-links-item:first-child::after {
  content: "";
  margin: 0 0 0 40px;
}

.header-links-item:nth-child(2)::after {
  content: "";
  margin: 0 0 0 43px;
}

.header-links-item:nth-child(5)::after {
  content: "";
  margin: 0 0 0 48px;
}

.header-links-item:last-child::after {
  content: "";
  width: 0;
  height: 0;
}

.hamburger-menu-list {
  position: fixed;
  width: 100%;
  height: 100vh;
  left: 100%;
  background-color: #333333;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 29px;
  transition: left 0.4s ease;
  list-style: none;
}

.hamburger-menu-list-item:first-child {
  margin: -90px 0 0 0;
} 


.hamburger-menu-list-item a {
  color: #fff;
  text-decoration: none;
}

.hamburger-menu {
  display: none;
}

@media screen and (max-width: 960px) {
  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 25px;
  }

  .header-logo {
    margin: 30px auto;
    width: 120px;
    height: 18px;
  }

  .hamburger-menu {
    position: relative;
    display: block;
    width: 25px;
    height: 20px;
    cursor: pointer;
    z-index: 20;
  }

  .hamburger-menu span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: #000;
    position: absolute;
    transition: all 0.3s ease;
  }

  .hamburger-menu span:first-child {
    top: 5px;
  }

  .hamburger-menu span:nth-child(2) {
    top: 14px;
  }

  /* アクティブ状態のハンバーガーメニュー */
  .hamburger-menu.active span:nth-child(1) {
    top: 9px;
    transform: rotate(-45deg);
  }

  .hamburger-menu.active span:nth-child(2) {
    top: 9px;
    transform: rotate(45deg);
  }
  
  .hamburger-menu-list.active {
    left: 0;
  }
}