h4 {
  font-size: 20px;
}

.nav .fixed {
  position: fixed;
  width: 100%;
}

.header-wrapper img{
  width: 100%;
}

.heading {
  padding-bottom: 10px;
  margin-bottom: 20px;
  border-bottom: double black;
}

.content-wrapper {
  margin-top: 70px;
}

.fluid-box {
  height: 50px;
  width: 99vw;
  position: relative;
  left: 50%;
  transform: translateX(-50%);
  background-color: gray;
  display: flex;
}

.nav-list {
  margin: auto;
  justify-content: center;
  align-items: center;
}

.nav-list li {
  padding: 0 30px;
}

.nav-list-sp li{
  border-bottom: solid 1px white;
  text-align: center;
  padding: 10px 0;
}

.nav-list-footer {
  margin-bottom: 20px;
}

.mc {
  padding-top: 10px;
  padding-bottom: 20px;
}

.image-box {
  position: relative;
  width: 100%;
  height: auto;
  display: flex;
  justify-content: center;
  align-items: center;
}

.image-box:before {
  content: "";
  display: block;
  padding-top: 100%;
}

.image-box img {
  position: absolute;
  max-width: 100%;
  max-height: 100%;
}

ul {
  list-style: none;
  padding: 0px;
}

.nav-list  a {
  color: white;
}

.nav-list a:hover {
  color: #65c3ed;
  text-decoration: none;
}

a {
  color: #4e81c8;
  font-weight: bold;
}

a:hover {
  color: #65c3ed;
  text-decoration: none;
}

#pagetop {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 100;
}

#button-pc {
  width: 100px;
}

#button-sp {
  width: 50px;
}

.st0 {
  fill: #4e81c8;
}
.st0:hover {
  fill: #65c3ed;
}

.video-inner {
  position: relative;
  padding-bottom: calc(315 / 560 * 100%);
  margin: 0 auto;
}
.video-content {
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
}

.go-to-top {
  width: 100px;
}