main.next .content {
  display: block;

}

body img {
  vertical-align: bottom;

}

.clearfix:after {
  clear: both;
  display: block;
  content: '';

}

.box-sizing {
  box-sizing: border-box;
  -moz-box-sizing: border-box;
  -webkit-box-sizing: border-box;
  -o-box-sizing: border-box;
  -ms-box-sizing: border-box;

}

.sp {
  display: none;

}

@media screen and (max-width: 700px) {
  .pc {
    display: none;

  }

  .sp {
    display: inherit;

  }


}



/* #yamaha_column
------------------------------------------------------------*/
section {
  margin: 0 auto;

}

#yamaha_column {
  width: 100%;
  margin: 0 auto;
  height: auto;

}

@media screen and (max-width: 700px) {
  section {
    width: 100%;
    margin: 0 auto;

  }


}



/* #KeyVisual */
#yamaha_column #keyv h1 {
  text-align: center;
  margin-bottom: 40px;

}

#yamaha_column #keyv .intro {
  text-align: center;
  font-weight: bold;
  font-size: 16px;
  line-height: 2;
  margin-bottom: 50px;

}

#yamaha_column #keyv .intro span {
  font-size: 18px;

}

#yamaha_column #keyv .artcle_list {
  display: table;
  margin: 0 auto 80px;

}

#yamaha_column #keyv .artcle_list dt {
  font-weight: bold;
  margin-bottom: 15px;

}

#yamaha_column #keyv .artcle_list dd {
  margin-bottom: 10px;

}

#yamaha_column #keyv .artcle_list dd a {
  color: #03a9f4;

}

#yamaha_column #keyv .artcle_list dd a:hover {
  text-decoration: underline;

}

@media screen and (max-width: 700px) {
  #yamaha_column #keyv .intro {
    text-align: center;
    font-weight: bold;
    font-size: 14px;
    line-height: 2;
    margin-bottom: 40px;

  }

  #yamaha_column #keyv .intro span {
    font-size: 16px;

  }

  #yamaha_column #keyv .artcle_list {
    display: table;
    margin: 0 auto 40px;

  }

  #yamaha_column #keyv .artcle_list dd a {
    color: #03a9f4;
    font-size: 14px;

  }


}

#yamaha_column .articles_num {
  font-size: 16px;
  font-weight: bold;
  border-bottom: 1px solid #000;
  margin-bottom: 40px;

}

@media screen and (max-width: 700px) {
  #yamaha_column .articles_num {
    font-size: 16px;
    font-weight: bold;
    border-bottom: 1px solid #000;
    margin-bottom: 30px;

  }


}

#yamaha_column .column_list {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  margin-bottom: 50px;

}

#yamaha_column .column_list .img {
  flex-basis: 400px;

}

#yamaha_column .column_list .txt {
  flex-basis: 660px;

}

@media screen and (max-width: 1100px) and (min-width: 701px) {
  #yamaha_column .column_list .img {
    flex-basis: 40%;

  }

  #yamaha_column .column_list .txt {
    flex-basis: 54%;

  }


}

#yamaha_column .column_list .txt h2 {
  font-size: 24px;
  margin-bottom: 20px;
  padding: 10px;
  padding-left: 80px;
  line-height: 1.8;
}

#yamaha_column .column_list .txt h2.ico_vol1 {
  background: url(../../../../uploads/2017/04/ico_vol1.png) no-repeat 0 center;

}

#yamaha_column .column_list .txt h2.ico_vol2 {
  background: url(../../../../uploads/2017/04/ico_vol2.png) no-repeat 0 center;

}

#yamaha_column .column_list .txt h2.ico_vol3 {
  background: url(../../../../uploads/2017/04/ico_vol3.png) no-repeat 0 center;

}

#yamaha_column .column_list .txt h2.ico_vol4 {
  background: url(../../../../uploads/2017/10/ico_vol4.png) no-repeat 0 center;

}

#yamaha_column .column_list .txt h2.ico_vol5 {
  background: url(../../../../uploads/2017/12/ico_vol5.png) no-repeat 0 center;

}

#yamaha_column .column_list .txt h2.ico_vol6 {
  background: url(../../../../uploads/2018/02/ico_vol6.png) no-repeat 0 center;

}

#yamaha_column .column_list .txt h2.ico_vol7 {
  background: url(../../../../uploads/2018/05/ico_vol7.png) no-repeat 0 center;

}

#yamaha_column .column_list .txt h2.ico_vol8 {
  background: url(../../../../uploads/2018/06/ico_vol8.png) no-repeat 0 center;

}

#yamaha_column .column_list .txt h2.ico_vol9 {
  background: url(../../../../uploads/2018/08/ico_vol9.png) no-repeat 0 center;

}

#yamaha_column .column_list .txt h2.ico_vol_after9 {
  background: url(../../../../uploads/2018/09/ico_vol_koto.png) no-repeat 0 center;

}

#yamaha_column .column_list .txt h2.ico_vol10 {
  background: url(../../../../uploads/2018/10/ico_vol10.png) no-repeat 0 center;

}

#yamaha_column .column_list .txt h2.ico_vol11 {
  background: url(../../../../uploads/2018/12/ico_vol11.png) no-repeat 0 center;

}

#yamaha_column .column_list .txt h2.ico_vol12 {
  background: url(../../../../uploads/2019/01/ico_vol12.png) no-repeat 0 center;

}

</p><p>#yamaha_column .column_list .txt h2.ico_vol13 {
  background: url(../../../../uploads/2019/01/ico_vol13.png) no-repeat 0 center;

}

</p><p>#yamaha_column .column_list .txt h2.ico_vol14 {
  background: url(../../../../uploads/2019/01/ico_vol14.png) no-repeat 0 center;

}

#yamaha_column .column_list .txt h2.ico_vol15 {
  background: url(../../../../uploads/2019/01/ico_vol15.png) no-repeat 0 center;

}

</p><p>#yamaha_column .column_list .txt h2.ico_vol16 {
  background: url(../../../../uploads/2019/01/ico_vol16.png) no-repeat 0 center;

}

</p><p>#yamaha_column .column_list .txt h2.ico_vol17 {
  background: url(../../../../uploads/2019/01/ico_vol17.png) no-repeat 0 center;

}

</p><p>#yamaha_column .column_list .txt h2.ico_vol18 {
  background: url(../../../../uploads/2019/01/ico_vol18.png) no-repeat 0 center;

}

</p><p>#yamaha_column .column_list .txt h2.ico_vol19 {
  background: url(../../../../uploads/2019/01/ico_vol19.png) no-repeat 0 center;

}

</p><p>#yamaha_column .column_list .txt h2.ico_vol20 {
  background: url(../../../../uploads/2019/01/ico_vol20.png) no-repeat 0 center;

}

</p><p>#yamaha_column .column_list p {
  margin-bottom: 10px;

}

#yamaha_column .column_list a {
  color: #03a9f4;

}

#yamaha_column .column_list a:hover {
  text-decoration: underline;

}

@media screen and (max-width: 700px) {
  #yamaha_column .column_list {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 30px;
    padding-bottom: 10px;
    border-bottom: 1px dotted #999;

  }

  #yamaha_column .column_list .img {
    flex-basis: 100%;
    max-width: 100%;
    text-align: center;

  }

  #yamaha_column .column_list .txt {
    flex-basis: 600px;

  }

  #yamaha_column .column_list .txt h2 {
    font-size: 20px;
    margin-bottom: 10px;
    padding: 10px;
    padding-left: 60px;
    line-height: 1.4;

  }

  #yamaha_column .column_list .txt h2.ico_vol1 {
    background-size: 40px;

  }

  #yamaha_column .column_list .txt h2.ico_vol2 {
    background-size: 40px;

  }

  #yamaha_column .column_list .txt h2.ico_vol3 {
    background-size: 40px;

  }

  #yamaha_column .column_list .txt h2.ico_vol4 {
    background-size: 40px;

  }

  #yamaha_column .column_list .txt h2.ico_vol5 {
    background-size: 40px;

  }

  #yamaha_column .column_list .txt h2.ico_vol6 {
    background-size: 40px;

  }

  #yamaha_column .column_list .txt h2.ico_vol7 {
    background-size: 40px;

  }

  #yamaha_column .column_list .txt h2.ico_vol8 {
    background-size: 40px;

  }

  #yamaha_column .column_list .txt h2.ico_vol9 {
    background-size: 40px;

  }

  #yamaha_column .column_list .txt h2.ico_vol_after9 {
    background-size: 40px;

  }

  #yamaha_column .column_list .txt h2.ico_vol10 {
    background-size: 40px;

  }

  #yamaha_column .column_list .txt h2.ico_vol11 {
    background-size: 40px;

  }

  #yamaha_column .column_list .txt h2.ico_vol12 {
    background-size: 40px;

  }

  #yamaha_column .column_list .txt h2.ico_vol13 {
    background-size: 40px;

  }

  #yamaha_column .column_list .txt h2.ico_vol14 {
    background-size: 40px;

  }

  #yamaha_column .column_list .txt h2.ico_vol15 {
    background-size: 40px;

  }

  #yamaha_column .column_list .txt h2.ico_vol16 {
    background-size: 40px;

  }

  #yamaha_column .column_list .txt h2.ico_vol17 {
    background-size: 40px;

  }

  #yamaha_column .column_list .txt h2.ico_vol18 {
    background-size: 40px;

  }

  #yamaha_column .column_list .txt h2.ico_vol19 {
    background-size: 40px;

  }


}