.is_sp {
  display: none;
}
.piece #main * {
  box-sizing: border-box;
}
.piece #main .page_title, .piece_prepare #main .page_title {
    margin: 0 0 9px;
    padding: 12px 18px 12px;
    font-size: 25px;
    text-align: left;
    color: #fff;
    border: 5px solid #d3d2d3;
    background-image: none;
    border-radius: 6px;
    background-color: #ff0012;
}
.piece .piece_tx{
    width: 95%;
    margin: 0 auto;
}
.piece .piece_tx h3{
    font-size: 23px;
  font-family:'UD Shin Go NT Medium';
    border-left: 5px solid #ff0012;
    color: #000;
    padding: 5px 0 5px 5px;
    margin: 25px auto 15px;
    line-height: 1.4;
}
.piece .piece_tx p{
    font-size: 15px;
    line-height: 1.8;
}
.piece .piece_tx img{
    margin: 25px auto;
}
.piece .piece_tx h4{
    font-size: 19px;
  font-family:'UD Shin Go NT Medium';
  border-top:1px solid #000;
  border-bottom:1px solid #000;
    color: #000;
    padding: 20px 0 20px 20px;
    margin: 33px auto 33px;
    line-height: 1.4;
}
.piece .piece_nav{
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 80px auto 80px;
}
.piece .piece_nav a{
font-size: 15px;
border: 1px solid #000;
display: inline-block;
text-decoration: none;
color: #000;
    padding: 12px 25px;
}
.piece .piece_nav a.prev span{
    transform: rotate(-90deg);
    display: inline-block;
    font-size: 13px;
    vertical-align: baseline;
    margin-right: 10px;
    transition: 0.3s;
}
.piece .piece_nav a.next span{
    transform: rotate(90deg);
    display: inline-block;
    font-size: 13px;
    vertical-align: baseline;
    margin-left: 10px;
    transition: 0.3s;
}
.piece .piece_nav a.prev:hover span{
    
    transform: rotate(-450deg);
}
.piece .piece_nav a.next:hover span{
    
    transform: rotate(450deg);
}
@media (max-width: 737px) {
  .is_pc {
    display: none;
  }
  .is_sp {
    display: block;
  }
.piece #main .page_title, .piece_prepare .page_title {
    font-size: 4.84vw;
    padding: 2vw 3vw;
    text-align: center;
    margin: 5vw 2%;
    color: #fff;
    border: 3px solid #ccc;
    background-color: #ff0012;
    border-radius: 6px;
}
.piece .piece_tx h3 {
    font-size: 4.6vw;
    font-family: 'UD Shin Go NT Medium';
    border-left: 5px solid #ff0012;
    color: #000;
    padding: 1vw 0 2vw 1vw;
    margin: 5vw auto 3vw;
    line-height: 1.4;
}
.piece .piece_tx p {
    font-size: 3.8vw;
    line-height: 1.8;
}
.piece .piece_tx h4 {
    font-size: 4.2vw;
    font-family: 'UD Shin Go NT Medium';
    border-top: 1px solid #000;
    border-bottom: 1px solid #000;
    color: #000;
    padding: 3vw 0 3vw 3vw;
    margin: 5vw auto 5vw;
    line-height: 1.4;
}
}