.pc {
  display: block;
}
.sp {
  display: none;
}
* {
  font-family: "メイリオ","Hiragino Kaku Gothic Pro","Meiryo","ヒラギノ角ゴ Pro W3","MS PGothic","MS UI Gothic","Helvetica","Segoe UI",Arial,sans-serif;
}

html {
  font-size: 10px;
  height: 100%;
  min-height: 100%;
  margin: 0;
  padding: 0;
}

body {
  font-family: "メイリオ","Hiragino Kaku Gothic Pro","Meiryo","ヒラギノ角ゴ Pro W3","MS PGothic","MS UI Gothic","Helvetica","Segoe UI",Arial,sans-serif;
  font-size: 1.3rem;
  margin: 0;
  padding: 0;
  position: relative;
  overflow-x: hidden;
  width: 100%;
  background: #f9f9f9;
  overflow-y: auto;
  }

img {
  -webkit-backface-visibility: hidden;
          backface-visibility: hidden;
  height: auto;
  max-width: 100%;
}
figure {
  margin: 0;
}
figure img {
  display: block;
  margin: auto;
}
.o-container {
  margin: 0 auto;
  position: relative;
  text-align: center;
  width: 100%;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.p-secmaint {
  background: #f9f9f9;
  color: #545f64;
  position: relative;
}

.p-maint__ttl {
  background: #ffa43b;
  width: 570px;
  margin: 5px auto 15px;
  padding: 5px 0;
  color: #fff;
  font-size: 3.5rem;
  border-radius: 30px;
}

.p-maint__text01 {
  font-size: 2rem;
  margin: 0 0 30px 0;
}

.p-maint__date {
  color: #ffa43b;
  font-size: 1.9rem;
  border-bottom: 6px solid;
  width: 570px;
  margin: 0 auto 10px;
}
.p-maint__date em {
  font-size: 2.5rem;
  font-style: normal;
}
.p-maint__text02 {
    font-size: 2rem;
}
@media screen and (max-width: 767px) {
  .p-maint__box {
    height: 100%;
  }
}
@media screen and (max-width: 600px) {
  .sp {
    display: block;
  }
  .pc {
    display: none;
  }
  .o-container {
    width: 100%;
  }
  .p-maint__box {
    width: 85%;
    margin: 0 auto;
    height: auto;
  }
  .p-maint__box figure {
    width: 80%;
    margin: 0 auto;
  }
  .p-maint__ttl {
    width: 100%;
    border-radius: 50px;
    font-size: 2.2rem;
    margin-top: 15px;
  }
  .p-maint__ttl span {
    display: block;
  }
  .p-maint__text01 {
    font-size: 1.5rem;
    margin: 0 0 17px 0;
    line-height: 1.7;
  }
  .p-maint__date {
    width: 100%;
    border: none;
    margin: 0 auto 25px;
  }
  .p-maint__date span {
    display: block;
    margin: 15px 0 0 0;
    font-size: 1.9rem;
    text-decoration: underline;
    text-decoration-thickness: 6px;
    text-underline-offset: 3px;
  }
  .p-maint__text02 {
    font-size: 1.7rem;
  }
  .p-maint__text02 span {
    display: block;
  }
}