body{max-width: none;}
article{
  max-width: 1100px;
  align-items: center;
  margin: 0 auto;
  position: relative;
}

.petitHeaderImg{/*ニュースと詳細のヘッダー下余白*/
  margin-bottom: 20px;
}

.petitMsg{
  display: block;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  margin-top: 74px;
  margin-bottom: 110px;
  padding-left: 20px;
  padding-right: 20px;
}
.petitMsg h2{
  font-size: 23px;
  margin-bottom: 28px;
  text-align: center;
}
.petitMsg p{
  font-size: 17px;
}
.petitHeaderBack {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 715.5px;
  background-color: #C5D3F8;
  z-index: -1;
}
@media(max-width:1099px){
  .petitHeaderBack{display: none;}
}

/*パンくずナビ*/
.navi_ic{
  font-size: 13px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: left;
  align-items: center;
  height: 40px;
  padding-left: 20px;
  margin-bottom: 40px;
}
.navi_ic a{
  color: blue;
  text-decoration: underline;
  font-size: 13px;
}
.navi_ic a:hover{
  text-decoration: none;
}
.navi_ic p{
  font-size: 13px;
}

@media (max-width:540px){
  .navi_ic{
    display: none;
  }
}


/*記事*/
.petitContent{
  display: block;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 20px;
}

#main_date{
  margin-bottom: 20px;
  font-size: 16px;
}
h2{
  margin-bottom: 40px;
  font-size: 26px;
}

.petitArticleImg{
  display: block;
  max-width: 560px;
  margin-bottom: 40px;
  margin-left: auto;
  margin-right: auto;
}

iframe.movie1{
  width: 94%;
  height: auto;
  aspect-ratio: 16 / 9;
  display: block;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 20px;
}

.petitText{
  display: block;
  font-size: 18px;
  max-width: 670px;
  text-align: center;
  margin-bottom: 60px;
}

@media(max-width:540px){
  #main_date{
    margin-bottom: 10px;
    font-size: 15px;
  }
  h2{
    margin-bottom: 20px;
    font-size: 20px;
  }
  .petitText{
    font-size: 16px;
  }
  iframe.movie1{
    width: 100%;
  }
}