.boxtext {
  max-width: 1024px;
  margin: 0 auto 3rem;
  background: #ccc;
}

/* ------------------------------------
// cmn
------------------------------------ */
@media screen and (max-width: 768px) {
  main {
    padding: 0 0 5rem;
  }
}

span.red,
strong.red {
  color: #b45757;
  font-weight: 500;
}
span.redB,
strong.redB {
  color: #b45757;
  font-weight: 700;
}
span.redBL,
strong.redBL {
  color: #b45757;
  font-weight: 700;
  border-bottom: 1px solid;
}
span.green,
strong.green {
  color: #57b49a;
  font-weight: 500;
}
span.greenB,
strong.greenB {
  color: #57b49a;
  font-weight: 700;
}
span.greenL,
strong.greenL {
  color: #57b49a;
  font-weight: 700;
  border-bottom: 1px solid;
}
span.blue,
strong.blue {
  color: #0a2e5a;
  font-weight: 500;
}
span.blueB,
strong.blueB {
  color: #0a2e5a;
  font-weight: 700;
}

.featurebox01 {
  padding-left: clamp(2rem, 50vw - 512px, 50vw - 512px);
  padding-bottom: clamp(5rem, 6.9vw, 10rem);
}
@media screen and (max-width: 768px) {
  .featurebox01 {
    padding: 0 2rem;
  }
}

.fTitle01 {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 2rem;
  padding-right: 2rem;
  padding: 0 2rem clamp(2rem, 3.5vw, 5rem) 0;
  margin-bottom: clamp(2rem, 3.5vw, 5rem);
  position: relative;
}
.fTitle01::before {
  content: "";
  width: 60vw;
  height: 1px;
  display: block;
  position: absolute;
  bottom: 0;
  right: -2rem;
  background: #2a5e8d;
}
.fTitle01 .num {
  align-self: center;
  font-size: clamp(3rem, 2.6vw, 3.8rem);
  letter-spacing: 0.05em;
  text-indent: 0.05em;
  font-family: "Plus Jakarta Sans", sans-serif;
  line-height: 1;
  display: grid;
  place-content: center;
  place-items: center;
  padding: 5px;
  aspect-ratio: 1;
  background: #ccc;
  color: #fff;
  line-height: 1;
  width: fit-content;
}
.fTitle01 h2 {
  align-self: center;
  font-family: "Noto Serif JP", serif;
  letter-spacing: 0.05em;
  text-indent: 0.05em;
  font-size: clamp(2.2rem, 1.9vw, 2.8rem);
}
.fTitle01 h2 span {
  font-size: clamp(2.6rem, 2.5vw, 3.6rem);
  color: #0a2e5a;
}
@media screen and (max-width: 768px) {
  .fTitle01 {
    gap: 1rem;
    margin: 0 -2rem;
    padding: 2rem;
    cursor: pointer;
  }
  .fTitle01::before {
    display: none;
  }
  .fTitle01 h2 {
    font-size: 1.6rem;
  }
  .fTitle01 h2 span {
    font-size: 2rem;
  }
  .fTitle01 h2::after {
    content: "";
    width: 3rem;
    aspect-ratio: 1/1;
    background: url(../img/cmn/icon_plus.svg) no-repeat 0 0/contain;
    position: absolute;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    transition: 0.3s;
  }
  .fTitle01.open h2::after {
    background-image: url(../img/cmn/icon_minus.svg);
  }
}

.fTitle02 {
  font-family: "Noto Serif JP", serif;
  letter-spacing: 0.05em;
  text-indent: 0.05em;
  font-size: clamp(1.8rem, 1.8vw, 2.6rem);
  font-weight: 500;
  color: #2a5e8d;
  margin-bottom: 3rem;
}
.fTitle02 span {
  color: #72c199;
  font-weight: 600;
}

.photobox {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 2.8vw, 4rem);
}
.photobox p + p {
  margin-top: 2rem;
}
@media screen and (max-width: 768px) {
  .photobox {
    grid-template-columns: 1fr;
  }
}

@media screen and (max-width: 768px) {
  .featureDetail {
    padding-bottom: 2rem;
  }
}

/* ------------------------------------
// topic01
------------------------------------ */
#topic01 .fTitle01 .num {
  background: #2a5e8d;
}

/* ------------------------------------
// topic02
------------------------------------ */
#topic02 {
  background: #fff;
  padding-bottom: clamp(5rem, 6.9vw, 10rem);
  padding-top: clamp(5rem, 6.9vw, 10rem);
}
#topic02 .fTitle01 .num {
  background: #428ba0;
}
#topic02 #experience,
#topic02 #expert {
  background: #f5f7fc;
  max-width: 1024px;
  margin: clamp(2.5rem, 3.5vw, 5rem) 2rem 0 0;
  padding: clamp(2rem, 3.5vw, 5rem);
}
@media screen and (max-width: 768px) {
  #topic02 #experience,
  #topic02 #expert {
    margin: clamp(2.5rem, 3.5vw, 5rem) 0 0 0;
  }
}
#topic02 #experience .fTitle02,
#topic02 #expert .fTitle02 {
  text-align: center;
}
#topic02 #experience .lead,
#topic02 #expert .lead {
  text-align: center;
  margin-bottom: clamp(3.5rem, 4.9vw, 7rem);
}
#topic02 #experience > section {
  background: #fff;
  padding: 1rem clamp(1rem, 1.4vw, 2rem);
}
#topic02 #experience > section h4 {
  color: #0a2e5a;
  font-size: clamp(2rem, 1.4vw, 2rem);
  margin-bottom: 1.5rem;
  position: relative;
  font-family: "Noto Serif JP", serif;
  font-weight: 500;
}
#topic02 #experience > section h4::before {
  content: "";
  width: calc(clamp(2.5rem, 3.5vw, 5rem) + 1rem);
  height: 1px;
  background: #0a2e5a;
  display: block;
  position: absolute;
  top: 50%;
  right: calc(100% + 1rem);
}
#topic02 #experience > section + section {
  margin-top: 2rem;
}
#topic02 #expert ul {
  font-family: "Noto Serif JP", serif;
}
#topic02 #expert ul li {
  padding: 2rem 1rem;
  background: rgba(66, 139, 160, 0.15);
  color: #0a2e5a;
  font-weight: 600;
  font-size: clamp(2rem, 1.4vw, 2rem);
  text-align: center;
}
#topic02 #expert ul li span {
  font-size: clamp(1.6rem, 1.1vw, 1.6rem);
}
#topic02 #expert ul li + li {
  margin-top: 1rem;
}
@media screen and (max-width: 768px) {
  #topic02 {
    padding: 0 2rem;
  }
  #topic02 #experience > section h4 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0;
    position: relative;
  }
  #topic02 #experience > section h4::after {
    content: "";
    width: 2.5rem;
    aspect-ratio: 1/1;
    background: url(../img/cmn/icon_plus.svg) no-repeat 0 0/contain;
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    transition: 0.3s;
  }
  #topic02 #experience > section h4.open::after {
    background-image: url(../img/cmn/icon_minus.svg);
  }
  #topic02 #experience > section h4 + * {
    margin-top: 1.5rem;
  }
}

/* ------------------------------------
// topic01
------------------------------------ */
#topic03 {
  padding-top: clamp(5rem, 6.9vw, 10rem);
}
#topic03 .fTitle01 .num {
  background: #57b49a;
}
#topic03 section + section {
  padding-top: clamp(5rem, 6.9vw, 10rem);
}
@media screen and (max-width: 768px) {
  #topic03 {
    padding: 0 2rem;
  }
}