* {
  margin: 0;
  padding: 0;
}

#Yu_packet {
  width: 1000px;
  margin: 0 auto;
  padding: 0 0 140px 0;
  font-weight: 500;
  font-family: "Noto Sans JP", sans-serif, Meiryo, "Hiragino Kaku Gothic ProN", "ヒラギノ角ゴ ProN W3";
  color: #333;
  letter-spacing: .025em;
  line-height: 1.8;
}

#Yu_packet * {
  box-sizing: border-box;
}

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
}

img {
  max-width: 100%;
}

.sp_only {
  display: none;
}

.color-r {
  color: #e71a19;
}

.detaile-underLine {
  text-decoration-line: underline;
  margin: 40px 0;
}


@media screen and (max-width:768px) {
  #Yu_packet {
    width: 90%;
  }
}

@media screen and (max-width:640px) {
  #Yu_packet {
    width: 90%;
    padding: 0 0 70px 0;
  }
  .sp_only {
    display: block;
  }
  .detaile-underLine {
    text-decoration-line: underline;
    margin: 20px 0;
  }
}

#Yu_packet .page_title {
  text-align: center;
  margin-bottom: 60px;
}

#Yu_packet .page_title_text {
  font-size: 26px;
  font-weight: bold;
  border-bottom: 1px solid #9e9e9e;
}

.group {
  overflow: hidden;
}

.group:not(:first-of-type) {
  margin-top: 60px;
}

.group_title {
  font-size: 20px;
  margin-bottom: 20px;
}

.group_title_text {
  font-weight: bold;
}

.detaile {
  font-size: 16px;
}

.definition {
  font-size: 14px;
  margin: 20px auto;
}

.definition .description {
  margin: 10px auto;
}

.col-2 {
  display: flex;
  flex-wrap: wrap;
}

/* .col-2 .image, .col-2 .detaile {
  width: 50%;
} */

.col-2 .image {
  width: 380px;
}

.col-2 .detaile {
  width: calc(100% - 380px);
}


.col-2 .detaile {
  padding-right: 15px;
  margin-bottom: 20px;
}

.center {
  text-align: left;
}

.attention_list {
  margin-left: 1em;
  text-indent: -1em;
  font-size: 16px;
}

.attention_list .attention {
  line-height: 1.8;
  margin: 10px auto;
}


@media screen and (max-width:768px) {

  .col-2 .image {
    width: 40%;
  }
  
  .col-2 .detaile {
    width: 60%;
  }

}

@media screen and (max-width:640px) {
  #Yu_packet .page_title {
    text-align: center;
    margin-bottom: 30px;
  }
  #Yu_packet .page_title_text {
    font-size: 18px;
    font-weight: bold;
    border-bottom: 1px solid #9e9e9e;
  }
  .group {
    overflow: hidden;
  }
  .group:not(:first-of-type) {
    margin-top: 40px;
  }
  .group_title {
    font-size: 16px;
    margin-bottom: 10px;
  }
  .group_title_text {
    font-weight: bold;
  }
  .detaile {
    font-size: 14px;
  }
  .definition {
    font-size: 12px;
    margin: 20px auto;
  }
  .definition .description {
    margin: 10px auto;
  }
  .col-2 .image, .col-2 .detaile {
    width: 100%;
  }
  .col-2 .detaile {
    padding-right: 10px;
  }
  .center {
    text-align: left;
  }
  .attention_list {
    margin-left: 1em;
    text-indent: -1em;
    font-size: 12px;
  }
  .attention_list .attention {
    line-height: 1.8;
    margin: 10px auto;
  }
}

@media screen and (max-width:320px) {
  #Yu_packet .page_title_text {
    font-size: 18px;
  }
  .group_title {
    font-size: 16px;
  }
  .detaile {
    font-size: 12px;
  }
  .definition {
    font-size: 12px;
  }
  .attention_list {
    font-size: 12px;
  }
}