.mainVisual {
  width: 100%;
}
.mainVisual a {
  position: relative;
  display: block;
  line-height: 1;
  max-width: 880px;
  height: auto;
}

.mainVisual video {
  width: 100%;
  height: auto;
  z-index: 1;
}

.g-header:not(.g-header--front) {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.6s ease;
}
.g-header:not(.g-header--front).is-appeared {
  opacity: 1;
  visibility: visible;
}
.g-header .g-nav .page-50th {
  padding-top: 10px;
}
.g-header .g-nav .page-50th a {
  display: block;
  width: 120px;
  padding-bottom: 10px;
}
.g-header .sitelogo {
  opacity: 1;
}
.g-header .js-sitelogo {
  opacity: 0;
}

.main-50th {
  position: relative;
  background-color: #1e1e1e;
  overflow: hidden;
  padding-bottom: 60lvh;
  margin-left: calc(10% + 180px);
  margin-right: auto;
  width: calc(90% - 180px);
  padding-top: 60px;
}
.main-50th__bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100lvh;
  z-index: 1;
  pointer-events: none;
  will-change: transform;
}
.main-50th__bg-inner {
  width: 100%;
  height: 100%;
  background: url(../images/bg_50th.jpg) no-repeat 30% bottom;
  background-size: cover;
  transform: translateY(0%);
}

.section-50th {
  position: relative;
  background: #fff;
  z-index: 3;
  box-sizing: border-box;
  padding-block: clamp(2rem, 1.1111111111rem + 1.8518518519vw, 2.5rem);
  padding-inline: clamp(2rem, 1.1111111111rem + 1.8518518519vw, 2.5rem);
  max-width: clamp(31.25rem, 15.6944444444rem + 32.4074074074vw, 40rem);
  margin: 0 auto 0 clamp(2.5rem, 0.2777777778rem + 4.6296296296vw, 3.75rem);
}
.section-50th h2 {
  font-size: clamp(1.5rem, 1.0555555556rem + 0.9259259259vw, 1.75rem);
  font-weight: 600;
  margin-bottom: 1em;
  letter-spacing: 0.08em;
  line-height: 2;
  color: #231815;
  white-space: nowrap;
}
.section-50th .txt {
  font-weight: 500;
  font-size: 17px;
  line-height: 2.3;
  letter-spacing: 0.08em;
  color: #231815;
  margin-bottom: 3em;
}
.section-50th .logo {
  display: block;
  width: 100%;
  max-width: clamp(31.25rem, 15.6944444444rem + 32.4074074074vw, 40rem);
}

@media screen and (max-width: 768px) {
  .mainVisual video {
    width: 100%;
    height: auto;
  }
  .g-header .g-nav .page-50th {
    padding-top: 0px;
    padding-bottom: 30px;
  }
  .g-header .g-nav .page-50th a {
    margin-inline: auto;
    width: 100px;
    padding-bottom: 0px;
  }
  .g-header .sitelogo,
  .g-header .js-sitelogo {
    opacity: 1;
  }
  .main-50th {
    position: relative;
    background-color: #1e1e1e;
    overflow: hidden;
    margin-right: auto;
    max-width: 1920px;
    width: 100%;
    margin-left: 0;
    padding-top: 100px;
    padding-bottom: 38lvh;
    padding-inline: clamp(1.875rem, 0.0858778626rem + 7.6335877863vw, 3.75rem);
  }
  .main-50th__bg-inner {
    width: 100%;
    height: 100%;
    background: url(../images/bg_50th-sp.jpg) no-repeat center bottom;
    background-size: cover;
    transform: translateY(0%);
  }
  .section-50th {
    width: 100%;
    max-width: clamp(20rem, 15.2290076336rem + 20.3562340967vw, 25rem);
    padding-block: clamp(1.25rem, 0.6536259542rem + 2.5445292621vw, 1.875rem);
    padding-inline: clamp(1.25rem, 0.6536259542rem + 2.5445292621vw, 1.875rem);
    margin-left: auto;
  }
  .section-50th h2 {
    font-size: clamp(1rem, 0.7614503817rem + 1.0178117048vw, 1.25rem);
  }
  .section-50th .txt {
    font-size: clamp(0.75rem, 0.6307251908rem + 0.5089058524vw, 0.875rem);
  }
  .section-50th .logo {
    display: block;
    margin-top: 30px;
    max-width: 100%;
    width: 100%;
  }
}
@media screen and (max-width: 1000px) {
  .page-group-header .g-nav .page-50th {
    padding-top: 0px;
    padding-bottom: 30px;
  }
  .page-group-header .g-nav .page-50th a {
    margin-inline: auto;
    width: 100px;
    padding-bottom: 0px;
  }
  .page-group-header .sitelogo,
  .page-group-header .js-sitelogo {
    opacity: 1;
  }
  .page-group-header ~ .sp-fixed-50th {
    display: block;
  }
}
.sp-fixed-50th {
  position: fixed;
  right: 15px;
  bottom: 50px;
  width: 60px;
  z-index: 990;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.sp-fixed-50th.is-visible {
  opacity: 1;
  visibility: visible;
}

.header-50th ~ .sp-fixed-50th {
  display: none !important;
}