header {
  background: #fff;
  width: 100%;
  z-index: 1000;
}

@media (max-width: 750px) {
  header {
    position: fixed;
  }
  header.is_open {
    height: 100vh;
    overflow-y: scroll;
    background-color: rgba(0, 0, 0, 0.5);
  }
  header.is_open .header__right {
    border-bottom: 1px solid #fff;
  }
  header.is_open .header__right span:first-of-type {
    -webkit-transform: translatey(10px) rotate(45deg);
    transform: translatey(10px) rotate(45deg);
  }
  header.is_open .header__right span:nth-of-type(2) {
    opacity: 0;
    display: none;
  }
  header.is_open .header__right span:nth-of-type(3) {
    -webkit-transform: rotate(-45deg);
    transform: rotate(-45deg);
  }
}

@media (min-width: 751px) {
  .header__margin {
    max-width: 1140px;
    margin: 0 auto;
  }
}

@media (min-width: 751px) {
  .header__inner {
    width: calc(100% - 40px);
    margin: 0 20px;
  }
}

.header__top {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: start;
  -ms-flex-align: start;
  align-items: flex-start;
  -webkit-box-pack: justify;
  -ms-flex-pack: justify;
  justify-content: space-between;
}

@media (min-width: 751px) {
  .header__top {
    height: 70px;
  }
}

@media (max-width: 750px) {
  .header__top {
    height: 55px;
    background-color: #fff;
  }
}

@media (min-width: 751px) {
  .header__left {
    margin-top: 14px;
  }
}

@media (max-width: 750px) {
  .header__left {
    margin-left: 20px;
  }
  .header__left img {
    height: 33px;
    margin: 11px 0;
  }
}

@media (min-width: 751px) {
  .header__right {
    margin-top: 23px;
  }
}

@media (max-width: 750px) {
  .header__right {
    width: 55px;
    height: 55px;
    background-color: #2976a7;
    padding: 15px;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
  }
  .header__right span {
    display: block;
    background-color: #fff;
    height: 2px;
    width: 25px;
    border-radius: 2px;
    margin-bottom: 8px;
    opacity: 1;
    -webkit-transition-duration: 0.4s;
    transition-duration: 0.4s;
  }
  .header__right span:last-child {
    margin-bottom: 0;
  }
}

.header__txt {
  color: #666666;
  font-size: 12px;
  letter-spacing: 0.1em;
}

@media (max-width: 750px) {
  .header__menu {
    position: absolute;
    top: 55px;
    z-index: 99;
    width: 100%;
    height: 0;
    overflow: hidden;
  }
  .header__menu.is_open {
    height: auto;
    overflow: auto;
  }
}

@media (min-width: 751px) {
  .header__list {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
  }
}

.header__list__item {
  display: block;
}

@media (min-width: 751px) {
  .header__list__item {
    width: calc(100% / 6);
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    text-align: center;
    height: 70px;
    position: relative;
  }
}

@media (max-width: 750px) {
  .header__list__item {
    background-color: #2976a7;
    border-bottom: 1px solid #fff;
    -webkit-transition: 0.4s all ease-out;
    transition: 0.4s all ease-out;
  }
}

.header__list__item:last-child {
  border-bottom: none;
}

@media (min-width: 751px) {
  .header__list__item:last-child .header__list__txt {
    border-right: 1px solid #c1c1c1;
  }
}

@media (min-width: 751px) {
  .header__list__item:last-child:hover:after {
    width: calc(100% - 2px);
  }
}

@media (min-width: 751px) {
  .header__list__item:hover, .header__list__item.is_open {
    color: #2976a7;
    z-index: inherit;
  }
  .header__list__item:hover .header__list__txt, .header__list__item.is_open .header__list__txt {
    border-top: solid 3px #2976a7;
    padding-top: 14px;
  }
}

@media (min-width: 751px) {
  .header__list__item:hover {
    cursor: pointer;
  }
}

@media (min-width: 751px) {
  .header__list__item.is_open:after {
    content: "";
    width: calc(100% - 1px);
    position: absolute;
    height: 0;
    border-bottom: 1px solid #fff;
    bottom: 10px;
    z-index: 101;
    left: 1px;
  }
}

.header__list__txt {
  display: block;
  width: 100%;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  font-weight: 700;
  letter-spacing: 0.06em;
}

@media (min-width: 751px) {
  .header__list__txt {
    border-left: 1px solid #c1c1c1;
    background-color: #fff;
    margin: 10px 0;
    height: 50px;
    font-size: 16px;
    line-height: 16px;
    padding: 17px 0;
    color: #333;
  }
  .header__list__txt:hover {
    color: #2976a7;
  }
}

@media (max-width: 750px) {
  .header__list__txt {
    height: 65px;
    font-size: 18px;
    line-height: 18px;
    padding: 23.5px 20px;
    color: #fff;
    position: relative;
  }
  .header__list__txt:after {
    content: "";
    background-image: url(/assets/img/common/arrow_white.png);
    position: absolute;
    height: 12px;
    width: 8px;
    top: 50%;
    -webkit-transform: translateY(-50%) rotate(90deg);
    transform: translateY(-50%) rotate(90deg);
    right: 20px;
  }
}

.header__list__txt--link:after {
  -webkit-transform: translateY(-50%);
  transform: translateY(-50%);
}

@media (min-width: 751px) {
  .header__list__txt--link:hover {
    color: #2976a7;
  }
}

.header__link__wrap {
  height: 0;
  overflow: hidden;
}

@media (min-width: 751px) {
  .header__link__wrap[aria-hidden="true"] {
    visibility: hidden;
  }
}

@media (min-width: 751px) {
  .header__link__wrap {
    position: absolute;
    background-color: #fff;
    color: #5bade0;
    width: 330px;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    height: auto;
    padding: 30px 0;
    top: 59px;
    border: 1px solid #c1c1c1;
    z-index: 100;
  }
}

@media (max-width: 750px) {
  .header__link__wrap {
    background-color: #377094;
    width: 100%;
  }
}

.header__link__list__item {
  text-align: left;
  position: relative;
}

@media (min-width: 751px) {
  .header__link__list__item {
    padding-left: 60px;
    padding-right: 30px;
    line-height: 40px;
  }
}

@media (max-width: 750px) {
  .header__link__list__item {
    line-height: 53px;
    border-bottom: solid 1px #7c99ab;
  }
  .header__link__list__item:last-child {
    border-bottom: none;
  }
}

.header__link__list__item:before {
  content: "";
  position: absolute;
}

@media (min-width: 751px) {
  .header__link__list__item:before {
    background: #5bade0 url(/assets/img/common/arrow_white.png) no-repeat center/30%;
    height: 18px;
    width: 18px;
    border-radius: 9px;
    left: 30px;
    top: 50%;
    -webkit-transform: translateY(-50%);
    transform: translateY(-50%);
  }
}

@media (max-width: 750px) {
  .header__link__list__item:before {
    background-image: url(/assets/img/common/arrow_white.png);
    background-size: 100%;
    height: 8px;
    width: 5.5px;
    top: 50%;
    -webkit-transform: translateY(-50%);
    transform: translateY(-50%);
    right: 20px;
  }
}

@media (min-width: 751px) {
  .header__link__list__link {
    display: inline-block;
    height: 100%;
    width: 100%;
  }
  .header__link__list__link:hover {
    color: #0f5380;
    text-decoration: underline;
  }
}

@media (max-width: 750px) {
  .header__link__list__link {
    display: block;
    color: #fff;
    font-size: 15px;
    height: 100%;
    width: 100%;
    padding: 0 20px;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
  }
}