@charset "UTF-8";
/* Color */
/* Size */
/* Mixin */
@media screen and (max-width: 767px) {
  html, body {
    height: 100%;
  }
}

html {
  font-size: 62.5%;
  font-size: 10px;
  font-family: "Noto Sans JP", sans-serif;
}

body {
  margin: 0;
  padding: 0;
}

p, h1, h2, h3, h4, h5, h6, ul, ol, dl, dt, dd, form, table, section, div, span, nav, hgroup, header, main, footer {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

a {
  color: #000;
  text-decoration: none;
}

img {
  width: 100%;
  height: auto;
  vertical-align: bottom;
}

li {
  list-style-type: none;
}

.mt-auto {
  margin-top: auto;
}

.wrap {
  position: relative;
  min-height: 100vh;
}
.wrap.bg-firstview:after {
  content: "";
  display: block;
  width: 100%;
  height: 100vh;
  position: absolute;
  top: 0;
  left: 0;
  z-index: -1;
}
.wrap.bg-fixed:after {
  content: "";
  display: block;
  width: 100%;
  height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
  z-index: -1;
}
.wrap.bg-yellow:after {
  background: #fff046;
}
.wrap.bg-gray:after {
  background: #c8cdcd;
}

.btn {
  text-align: center;
}
.btn a {
  max-width: 240px;
  margin: 50px auto 30px;
  display: inline-block;
  background: #FFF;
  border: solid 3px #000;
  padding: 8px 25px;
  text-align: center;
  font-size: 18px;
  letter-spacing: 0.035em;
  font-weight: 600;
}

.header {
  padding: 60px 40px 0 30px;
  position: absolute;
  width: 100%;
  top: 0;
  left: 0;
}
@media (max-width: 1020px) {
  .header {
    padding: 0;
  }
}
.header-inner {
  display: flex;
  position: relative;
  width: 100%;
}
.header-inner .site-title {
  width: 167px;
  position: absolute;
  top: -20px;
  left: 15px;
}
@media (min-width: 1400px) {
  .header-inner .site-title {
    width: 210px;
    left: 30px;
    top: -16px;
  }
}
@media (max-width: 1020px) {
  .header-inner .site-title {
    top: 23px;
    left: 30px;
    width: 150px;
  }
}
.header-inner .site-title .logo {
  width: 100%;
}
.header-nav {
  background: #FFF;
  display: flex;
  align-items: center;
  margin-left: auto;
  border-radius: 48px;
  padding: 0 30px 0 40px;
  height: 76px;
  position: relative;
}
.header-nav .nav-home {
  display: none;
  position: absolute;
  opacity: 0;
  transform: translateX(20px);
}
@media (max-width: 1020px) {
  .header-nav .nav-home {
    display: block;
    width: 150px;
    top: 23px;
    left: 30px;
    transition: opacity 0.3s 0.3s, transform 0.3s 0.3s;
  }
}
.header-nav .gnav {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-right: 24px;
}
.header-nav .gnav li a {
  transition: opacity 0.3s;
}
.header-nav .gnav li img {
  height: 15px;
  width: auto;
}
@media (min-width: 861px) {
  .header-nav .gnav li a:hover {
    opacity: 0.6;
  }
}
@media (max-width: 1020px) {
  .header-nav {
    position: fixed;
    top: 0;
    left: auto;
    right: -100%;
    width: 100%;
    padding: 25vh 10% 80px;
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    gap: 80px;
    height: 100%;
    transform: translateY(0);
    transition: all 0.3s ease-out;
    z-index: 100;
    opacity: 0;
    overflow-y: auto;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px); /* Safari 対応 */
    background-color: #000;
    border-radius: 0px;
    font-size: 1.6rem;
    font-weight: 300;
  }
  .header-nav .gnav {
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    gap: 2.3em;
    margin: 0;
    width: 100%;
  }
  .header-nav .gnav li img {
    height: 20px;
    width: auto;
  }
}
@media (max-width: 1020px) {
  .header-nav.active {
    right: 0;
    opacity: 1;
  }
  .header-nav.active .burger span:nth-child(1) {
    transform: translateY(-1px) rotateZ(45deg);
  }
  .header-nav.active .burger span:nth-child(2) {
    opacity: 0;
  }
  .header-nav.active .burger span:nth-child(3) {
    transform: translateY(-1px) rotateZ(-45deg);
  }
  .header-nav.active .nav-home {
    opacity: 1;
    transform: translateX(0);
  }
}
.header .logo-keio {
  max-width: 165px;
  margin-left: 30px;
}
@media (max-width: 1020px) {
  .header .logo-keio {
    margin-left: 0;
  }
}
@media (min-width: 861px) {
  .header .logo-keio a {
    transition: opacity 0.3s;
  }
  .header .logo-keio a:hover {
    opacity: 0.6;
  }
}
.header .burger {
  display: none;
}
@media (max-width: 1020px) {
  .header .burger {
    display: block;
    position: fixed;
    top: 25px;
    right: 25px;
    width: 50px;
    height: 50px;
    z-index: 1001;
    background: rgb(255, 255, 255);
    border-radius: 50%;
    transition: left 0.3s;
  }
  .header .burger span {
    display: block;
    position: absolute;
    width: 26px;
    height: 3px;
    background: #000000;
    left: 12px;
    top: 24px;
    transition: all 0.3s;
  }
  .header .burger span:nth-child(1) {
    transform: translateY(-6px);
  }
  .header .burger span:nth-child(2) {
    transform: translateY(4px);
  }
  .header .burger.active span:nth-child(1) {
    transform: rotateZ(45deg) translateY(0);
  }
  .header .burger.active span:nth-child(2) {
    transform: rotateZ(-45deg) translateY(0);
  }
}

.footer {
  position: absolute;
  bottom: 50px;
  left: calc((100% - 1060px) / 2);
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: 1060px;
  margin: 0 auto;
  border-radius: 50px;
  background: #FFF;
  padding: 20px 30px;
  z-index: 1000;
}
@media (max-width: 1060px) {
  .footer {
    left: 30px;
    width: calc(100% - 60px);
  }
}
@media (max-width: 860px) {
  .footer {
    border-radius: 0px;
    left: 0px;
    width: 100%;
    bottom: 0px;
    position: static;
    flex-direction: column;
    align-items: flex-start;
    padding: 30px 30px 20px;
  }
}
.footer .f--links {
  display: flex;
  gap: 20px;
}
@media (max-width: 860px) {
  .footer .f--links {
    gap: 30px;
    flex-direction: column;
    justify-content: center;
  }
}
.footer .f--links a {
  display: block;
}
.footer .f--links a img {
  height: 30px;
}
@media (max-width: 860px) {
  .footer .f--links a img {
    height: 30px;
    width: auto;
  }
}
@media (min-width: 861px) {
  .footer .f--links a {
    transition: opacity 0.3s;
  }
  .footer .f--links a:hover {
    opacity: 0.6;
  }
}
.footer .f--nav .btns {
  display: flex;
  justify-content: flex-end;
  gap: 15px;
  font-size: 1.3rem;
  margin-bottom: 10px;
}
@media (max-width: 860px) {
  .footer .f--nav .btns {
    margin-top: 50px;
    margin-bottom: 20px;
  }
}
@media (min-width: 861px) {
  .footer .f--nav .btns a {
    transition: opacity 0.3s;
  }
  .footer .f--nav .btns a:hover {
    opacity: 0.6;
  }
}
.footer .f--nav .copy {
  font-family: "Roboto", sans-serif;
  font-size: 12px;
}
@media (max-width: 860px) {
  .footer .f--nav .copy {
    font-size: 11px;
    text-align: right;
  }
}
@media (max-width: 860px) {
  .footer .f--nav {
    width: 100%;
  }
}