html {
  font-size: 49.6%;
}

body {
  background-color: #fff;
}

#container {
  background-color: #fff;
  overflow: hidden;
  font-family: "游ゴシック体", YuGothic, "游ゴシック", "Yu Gothic", "メイリオ", "Hiragino Kaku Gothic ProN", "Hiragino Sans", sans-serif;
  font-weight: 500;
}

.sp-only {
  display: none !important;
}

/* common-header */
#common-header {
  padding-left: 35px;
  padding-right: 45px;
  margin-top: 25px;
  display: flex;
  justify-content: space-between;
}

#common-header .left {
  display: flex;
}

#common-header .right {
  display: flex;
}

#common-header .left .logo {
  width: 96px;
}

#common-header .left .nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

#common-header .left .nav ul li {
  display: inline-block;
  font-weight: 500;
  font-size: 1.9rem;
  letter-spacing: 0.4rem;
}


#common-header .left .nav ul li a {
  position: relative;
  color: #A5A5A6;
  display: inline-block;
  line-height: 3.9rem;
  vertical-align: top;
  padding-left: 20px;
  padding-right: 20px;
  border-left: 1px solid #A5A5A6;
}

@media screen and (max-width: 1100px) {
  #common-header .left .nav ul li {
    display: inline-block;
    font-weight: 500;
    font-size: 1.7rem;
    letter-spacing: 0.2rem;
  }

  #common-header .left .nav ul li a {
    position: relative;
    color: #A5A5A6;
    display: inline-block;
    line-height: 3.9rem;
    vertical-align: top;
    padding-left: 18px;
    padding-right: 18px;
    border-left: 1px solid #A5A5A6;
  }
}

#common-header .left .nav ul li:last-of-type a {
  border-right: 1px solid #A5A5A6;
}

#common-header .left .nav ul li a::after {
  position: absolute;
  bottom: 0px;
  left: 0;
  content: '';
  width: 100%;
  height: 1px;
  background: #a5a5a6;
  transform: scale(0, 1); 
  transform-origin: left top;
  transition: transform 0.3s ease;
}

#common-header .left .nav ul li a:hover::after {
  transform: scale(1, 1);
}

#common-header .external-link ul {
  list-style: none;
  display: flex;
  align-items: flex-end;
  gap: 35px 35px;
}

/* Contact */
#common-header .external-link li:nth-of-type(1) {
  width: 32px;
}

/* Twitter */
#common-header .external-link li:nth-of-type(2) {
  width: 29px;
}

/* Instagram */
#common-header .external-link li:nth-of-type(3) {
  width: 26px;
}

/* common footer */
#common-footer {
  width: 1030px;
  margin: auto;
  margin-top: 250px;
}

#common-footer .external-link {
  height: 50px;
/*  border-top: 3px solid #a5a5a6; */
  border-bottom: 3px solid #a5a5a6;
}

#common-footer .content {
  display: flex;
  margin-top: 40px;
  gap: 0px 50px;
  justify-content: center;
}

#common-footer .list ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 15px 20px;
}

#common-footer .list ul li {
  font-size: 1.7rem;
  font-weight: 600;
  letter-spacing: 0.2rem;
  color: #A5A5A6;
}

#common-footer .list ul li.sub {
  font-size: 1.4rem;
  font-weight: 600;
}

#common-footer .list ul li a {
  color: #A5A5A6;
}

#common-footer .list ul li a:hover {
  opacity: 0.75;
}

#common-footer .list.icon ul {
  flex-direction: row;
  flex-wrap: wrap;
  gap: 35px 40px;
  width: 140px;
}

/* Twitter */
#common-footer .list.icon ul li:nth-of-type(1) {
  width: 29px;
}

/* Instagram */
#common-footer .list.icon ul li:nth-of-type(2) {
  width: 25.6px;
}

/* Contest */
#common-footer .list.icon ul li:nth-of-type(3) {
  width: 168px;
}

#common-footer .logo {
  width: 70px;
  margin: auto;
  margin-top: 40px;
}

#common-footer .copyright {
  font-size: 1.6rem;
  font-weight: 500;
  color: #A5A5A6;
  text-align: center;
  margin-top: 25px;
  padding-bottom: 15px;
}

/* common section */
.common-section .inner {
  position: relative;
  width: 1030px;
  margin: auto;
}

.common-section .inner .heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.common-section .inner .heading .text {
  position: relative;
  width: 28%;
}

.common-section .inner .heading .text .arch {
  position: absolute;
  top: -55px;
  left: 50%;
  transform: translate(-50%, 0);
  width: 90%;
}

.common-section .inner .heading h2 {
  font-size: 4.1rem;
  font-weight: 600;
  letter-spacing: 1.5rem;
  color: #687A87;
  text-align: center;
  padding-left: 12px;
}

.common-section .inner .heading .h-line {
  width: 35%;
  display: block;
  height: 3px;
  background-color: #A5A5A6;
}