body {
  font-family: "Montserrat", "Zen Maru Gothic", sans-serif;
  color: #b2d4d6;
  background-color: #142042;
}
body.is-fixed {
  overflow: hidden;
}

.button {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  padding: 6px 10px 6px 30px;
  width: 200px;
  margin: 0 auto;
}
.button--bg {
  background-color: #fff;
}
.button--bg .button__text {
  color: #142042;
}
.button--border {
  border: 1px solid #fff;
}
.button--border .button__text {
  color: #fff;
}
.button__icon {
  width: 24px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
}
.button__icon-path {
  fill: #fff;
}
.button__icon-path--contact {
  fill: #142042;
}
.button__text {
  margin-left: 10px;
  font-size: 16px;
  color: #fff;
  letter-spacing: 0.08em;
}

.header {
  background-color: #142042;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 999;
}
.header__container {
  position: relative;
}
.header__logo {
  display: -webkit-inline-box;
  display: -ms-inline-flexbox;
  display: inline-flex;
  padding: 14px 24px;
  font-size: 20px;
  color: #fff;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
}
.header__menu-button {
  border: none;
  position: absolute;
  top: 24px;
  right: 24px;
  width: 30px;
  height: 36px;
  overflow: hidden;
  color: transparent;
  background-color: transparent;
  background: url(../img/bg_menu.png) center center no-repeat;
  background-size: contain;
}
.header__menu-button.is-checked {
  background: url(../img/bg_menu-close.png) center center no-repeat;
  background-size: contain;
}
.header__contents {
  display: none;
  height: calc(100vh - 88px);
  border-top: 1px solid #fff;
  padding-top: 60px;
}
.header__nav-item + .header__nav-item {
  margin-top: 24px;
}

.fv {
  height: 500px;
}
.fv__img {
  position: relative;
  top: -150px;
}
.fv__img img {
  width: 767px;
  height: 665px;
  -o-object-fit: cover;
     object-fit: cover;
}
.fv__img::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 344px;
  background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0, transparent), color-stop(70, #142042));
  background-image: linear-gradient(180deg, transparent 0 70%, #142042 70 100%);
}
.fv__contents {
  position: absolute;
  top: 40px;
  left: 0;
  width: 100%;
  padding: 32px;
}
.fv__heading-main {
  font-size: 38px;
  font-weight: bold;
}
.fv__heading-sub {
  display: block;
  font-size: 16px;
  margin-top: 200px;
  text-align: right;
}

.section {
  padding: 48px 0;
}
.section__inner {
  padding: 0 32px;
}
.section__head {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  margin-bottom: 32px;
}
.section__head--center {
  text-align: center;
}
.section__head-main {
  font-size: 40px;
  letter-spacing: 0.1em;
  color: #fff;
}
.section__head-sub {
  font-size: 11px;
}
.section__lead-text {
  line-height: 1.6em;
}

.service__list {
  margin-top: 40px;
}
.service__item + .service__item {
  margin-top: 40px;
}
.service__item-img {
  display: block;
  text-align: center;
  margin-bottom: 14px;
}
.service__item-name {
  display: block;
  text-align: center;
  font-size: 14px;
  font-weight: bold;
  margin-bottom: 10px;
}
.service__item-text {
  font-size: 14px;
  line-height: 1.6;
}

.works__list {
  margin-top: 40px;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
}
.works__item + .works__item {
  margin-top: 40px;
}
.works__item-img {
  max-width: 480px;
  margin-bottom: 12px;
}
.works__item-name {
  display: block;
  font-weight: bold;
  margin-bottom: 8px;
}
.works__item-link {
  display: block;
  font-size: 14px;
  margin-bottom: 10px;
  text-decoration: underline;
}

.about__img {
  -webkit-box-shadow: 0 4px 15px 0px rgba(0, 0, 0, 0.3);
          box-shadow: 0 4px 15px 0px rgba(0, 0, 0, 0.3);
  margin-bottom: 30px;
}
.about__text {
  line-height: 1.6;
}
.about__text + .about__text {
  margin-top: 15px;
}

.flow__list {
  margin-top: 64px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px 20px;
}
.flow__item {
  position: relative;
  border: 1px solid;
  padding: 46px 16px 24px;
}
.flow__item-num {
  position: absolute;
  top: -24px;
  left: 50%;
  width: 48px;
  height: 40px;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-transform: translateX(-50%);
          transform: translateX(-50%);
  font-size: 24px;
  background-color: #142042;
  color: #fff;
  padding: 0 20px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
}
.flow__item-img {
  text-align: center;
  margin-bottom: 24px;
}
.flow__item-name {
  text-align: center;
  margin-bottom: 10px;
  font-size: 16px;
  font-weight: bold;
}
.flow__item-text {
  font-size: 12px;
  line-height: 1.6;
}

.message__img {
  margin-bottom: 30px;
}

.page-bottom {
  color: #fff;
}
.page-bottom__item {
  padding: 40px;
}
.page-bottom__item--contact {
  background-color: #2e517c;
}
.page-bottom__item--twitter {
  background-color: #142042;
}

.footer {
  text-align: center;
  padding: 10px;
}
.footer__copy {
  font-size: 11px;
  font-family: "Noto Sans JP", sans-serif;
}

@media screen and (min-width:768px) {
  .header {
    background-color: #142042;
    position: relative;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    top: 0;
    margin: 0 auto;
    padding: 0 auto;
    max-width: 100%;
    z-index: 999;
    height: 130px;
  }
  .header__container {
    position: relative;
    margin: 0 auto;
  }
  .header__menu-button {
    display: none;
  }
  .header__contents {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    height: 100px;
    border-top: 1px solid #fff;
    padding: 30px 10px 30px 20px;
  }
  .header__nav {
    width: 768px;
  }
  .header__nav-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px 10px;
  }
  .header__nav-item + .header__nav-item {
    margin-top: 0;
  }
  .header__menu-button {
    display: none;
  }
  .button {
    width: 175px;
    -webkit-transition: background 0.3s, color 0.3s, opacity 0.3s;
    transition: background 0.3s, color 0.3s, opacity 0.3s;
    padding: 6px 5px 6px 5px;
    margin: 0 auto;
  }
  .button:hover {
    background-color: #fff;
  }
  .button:hover .button__icon-path {
    fill: #142042;
  }
  .button:hover .button__text {
    color: #142042;
  }
  .button--bg {
    color: #142042;
    background-color: #142042;
  }
  .button--bg .button__text {
    color: #fff;
  }
  .button--bg:hover {
    opacity: 0.7;
  }
  .button--border {
    border: none;
  }
  .button--border .button__text {
    color: #fff;
  }
  .button__icon-path--contact {
    fill: #fff;
  }
  .button__text {
    margin-left: 5px;
    font-size: 16px;
    color: #fff;
  }
  .main {
    padding: 0;
    display: block;
  }
  .section__inner {
    max-width: 944px;
    margin: 0 auto;
  }
  .section__head {
    margin-bottom: 24px;
  }
  .section__head-main {
    font-size: 60px;
  }
  .fv {
    height: 650px;
    position: relative;
    background-image: url(../img/IMG_fv.png);
    background-position-y: -200px;
  }
  .fv img {
    display: none;
  }
  .fv__img::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 650px;
    background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0, transparent), color-stop(70, #142042));
    background-image: linear-gradient(180deg, transparent 0 70%, #142042 70 100%);
  }
  .fv__img {
    position: relative;
    margin-left: 0;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    top: 0;
  }
  .fv__contents {
    bottom: 100px;
    left: 0;
    padding: 32px 96px;
  }
  .fv__heading-main {
    font-size: 40px;
    font-weight: bold;
  }
  .fv__heading-sub {
    display: block;
    font-size: 20px;
    margin-top: 300px;
    text-align: right;
    background-color: transparent;
  }
  .service__list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 70px;
  }
  .service__item + .service__item {
    margin-top: 0;
  }
  .works__list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 70px;
  }
  .works__item + .works__item {
    margin-top: 0;
  }
  .about__container {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: horizontal;
    -webkit-box-direction: reverse;
        -ms-flex-direction: row-reverse;
            flex-direction: row-reverse;
    gap: 40px;
  }
  .flow__list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }
  .flow__item + .flow__item {
    margin-top: 0;
  }
  .message__container {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: horizontal;
    -webkit-box-direction: reverse;
        -ms-flex-direction: row-reverse;
            flex-direction: row-reverse;
    gap: 40px;
  }
  .page-bottom {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }
  .page-bottom__item {
    padding: 54px 10px;
  }
}
@media screen and (min-width:768px) and (max-width:1024px) {
  .header {
    height: 130px;
  }
  .header__nav-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px auto;
  }
  .header__contents {
    display: block;
  }
  .section__head-main {
    font-size: 54px;
  }
  .flow__list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px 16px;
  }
}