#sec01 .creation-btn,
#sec03 .creation-btn {
  font-weight: 500;
}

#sec01 .main_back {
  background: url(../quakeproof/images/main_bg.jpg);
  min-height: 725px;
  background-size: cover;
}
@media screen and (max-width: 680px) {
  #sec01 .main_back {
    background: url(../quakeproof/images/main_bg_sp.jpg);
    height: auto;
    min-height: 0;
    background-size: cover;
    padding: 50px 0;
  }
}
.main_wrap {
  text-align: center;
}
.main-title {
  font-size: 52px;
  font-family: "Noto Serif JP", serif;
  line-height: 1.2;
  letter-spacing: 0.1em;
  margin-bottom: 30px;
}
.main-subtitle {
  color: #274E8D;
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 40px;
}
.main_text {
  font-size: 17px;
  line-height: 2.5;
  margin-bottom: 44px;
}
.main_text sup {
  font-size: 0.6em;
  vertical-align: super;
  line-height: 0;
}
.main-note {
  font-size: 15px;
  font-weight: normal;
  margin-top: 8px;
}
@media screen and (max-width: 680px) {
  .main-title {
    font-size: 30px;
    margin-bottom: 11px;
    letter-spacing: 0.02em;
  }
  .main-subtitle {
    font-size: 14px;
    margin-bottom: 11px;
  }
  .main_text {
    font-size: 15px;
    line-height: 3.2;
    margin-bottom: 28px;
    text-align: left;
  }
  .main-note {
    font-size: 13px;
    text-align: center;
  }
}
@media screen and (max-width: 680px) {
  .creation-title span {
    margin-bottom: 0;
  }
}
#sec_necessity,
#sec_features,
#sec_flow,
#sec03 {
  padding-top: 70px;
}
@media screen and (max-width: 680px) {
  #sec_necessity,
  #sec_features,
  #sec_flow,
  #sec03 {
    padding-top: 40px;
    padding-bottom: 40px;
  }
    #sec04 {
    padding-top: 40px;
    padding-bottom: 40px;
  }
}
#sec_flow {
  padding-bottom: 200px;
}
@media screen and (max-width: 680px) {
  #sec_flow{
    padding-bottom: 50px;
  }
}
.sec_flex2col {
  display: flex;
  gap: 40px;
}
.sec_flex2col--txt {
  flex: 1 0 0;
  font-size: 16px;
  line-height: 2;

}
.sec_flex2col--txt sup {
  font-size: 0.6em;
  vertical-align: super;
  line-height: 0;
}
.sec_flex2col--txt .note-list {
  margin-top: 20px;
}
.sec_flex2col--txt .note-list li {
  margin-bottom: 0.5em;
  display: flex;
  gap: 1em;
  align-items: flex-start;
  line-height: 1.5;
}
.sec_flex2col--txt .note-list .note-mark {
  width: 2em;
}
.sec_flex2col--img {
  flex: 1 0 0;
  min-width: 0;
  width: auto;
  max-width: 100%;
  aspect-ratio: 480 / 335;
  margin: 0;
}
.sec_flex2col--img img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.sec_flex2col--img figcaption {
  font-size: 14px;
  margin-top: 16px;
}
@media screen and (max-width: 680px) {
  .sec_flex2col {
    flex-direction: column-reverse;
    gap: 20px;
  }
  .sec_flex2col--img {
    flex: 0 0 auto;
    width: 100%;
    max-width: 100%;
  }
  .sec_flex2col--img figcaption {
    margin-top: 4px;
  }
  .sec_flex2col--txt {
    width: 100%;
    font-size: 15px;
    line-height: 1.875;
    margin-top: 30px;
  }
  .sec_flex2col--txt .note-list {
    font-size: 11px;
    font-weight: normal;
  }
  .creation-title {
    font-size: 22px;
    margin-bottom: 28px;
  }
}
.sec_flex2col.reverse {
  flex-direction: row-reverse;
}
@media screen and (max-width: 680px) {
  .sec_flex2col.reverse {
    flex-direction: column-reverse;
  }
}
.sec_flow-grid ul {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 35px;
}
.sec_flow-grid ul figcaption {
  margin-top: 20px;
}
@media screen and (max-width: 680px) {
  .sec_flow-grid ul {
    grid-template-columns: 1fr;
  }
  .sec_flow-grid ul figcaption {
  margin-top: 16px;
}
}