body,
html {
  margin: auto;
  font-family: "Noto Sans JP", sans-serif;
  font-optical-sizing: auto;
  font-style: normal;
}

/* タイトル */
.thumb {
  background-image: url(../image/exterior/index_exterior_bg.jpg);
  background-size: cover;
  background-position: center center;
  display: flex;
  text-align: center;
  flex-flow: column;
  align-items: center;
}

a.current::before {
  background-color: rgba(255, 255, 255, 0);
}

.thumb-title {
  color: #fff;
  margin: 5% auto 1px auto;
}

.thumb-title > h1 {
  margin-bottom: 5px;
  padding: 2px 60px;
  font-size: 50px;
  letter-spacing: 0.1em;
  font-weight: 100;
  border: 2.5px solid #fff;
  font-family: "Roboto", sans-serif;
}

.thumb-title-sb {
  color: #fff;
  margin: 0px auto 5% auto;
}

.thumb-title-sb > p {
  font-size: 15px;
  margin-top: 12px;
}

main {
  text-align: center;
  margin-bottom: 230px;
}

/* 右半分色 */
.section1 {
  margin: 7% auto auto auto;
  /* height: 42vw; */
  background: linear-gradient(
    90deg,
    transparent 0%,
    transparent 40%,
    #dddddd 40%,
    #dddddd 100%
  );
  display: flex;
  align-items: center;
  justify-content: center;
}

.sectionimg1 {
  margin-left: 10%;
  padding: 60px 0.5% 60px 0%;
  width: 60%;
}

.sectionimg1 > img {
  /* margin-left: 18vw; */
  width: 100%;
  max-width: 550px;
}

.sectiontxt1 {
  margin: 0% 10% 0% 2%;
  padding: 5% 0% 5% 0%;
  width: 40%;
  display: grid;
  justify-content: start;
}

.sectiontxt1-1 {
  letter-spacing: 0.3em;
}

.sectiontxt1-1 h2 {
  font-weight: 600;
  font-size: 25px;
  font-style: italic;
}

.sectiontxt1-2 {
  padding-top: 15px;
  text-align: left;
  display: flex;
  justify-content: space-evenly;
}

/* 左半分 */
.section2 {
  margin: 7% auto auto auto;
  /* height: 42vw; */
  background: linear-gradient(
    270deg,
    transparent 0%,
    transparent 40%,
    #f9f9f9 0%,
    #f9f9f9 100%
  );
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: row-reverse;
}

.sectionimg2 {
  margin-right: 10%;
  padding: 60px 0.5% 60px 0%;
  width: 60%;
}

.sectionimg2 > img {
  /* margin-left: 18vw; */
  width: 100%;
  max-width: 550px;
}

.sectiontxt2 {
  margin: 0% 2% 0% 10%;
  padding: 5% 0% 5% 0%;
  width: 50%;
  display: grid;
  justify-content: end;
}

.sectiontxt2-1 {
  letter-spacing: 0.3em;
}

.sectiontxt2-1 h2 {
  font-weight: 550;
  font-size: 25px;
  font-style: italic;
  font-weight: bold;
}

.sectiontxt2-2 {
  padding-top: 15px;
  text-align: left;
  display: flex;
  justify-content: space-evenly;
}

.section3 {
  margin: 10%;
}

.section4 {
  margin: 10%;
}

.section4img2 {
  display: flex;
  flex-wrap: wrap;
  /* 画像を並べて表示 */
  justify-content: space-between;
}

.section4img2-1 {
  width: 22.5%;
  /* 幅を調整して横並びにする */
  margin: 1%;
  /* 画像間のスペースを調整 */
  font-weight: bold;
}

.section4img2-1 img {
  width: 100%;
  /* 画像を親要素に合わせる */
}

.section4img2-1 > p {
  margin-top: 5px;
  font-weight: 500;
}

.section5 {
  margin: 4% 0 10% 0;
  line-height: 34px;
}

.section5 > p {
  margin: 5px;
}

.title {
  letter-spacing: 1vw;
  display: flex;
  border-bottom: 1px solid #333;
  display: inline;
  padding: 0 0 50px 0;
}

.title h2 {
  padding: 0 5%;
  /* 線の長さ */
  font-weight: 400;
  font-size: 40px;
  border: #000000;
  display: inline-block;
  text-align: center;
  /* border-bottom: 2px solid #000000; */
}

.nav {
  display: flex;
  margin: 1% auto 5% 10%;
}

.section4subtitle {
  font-size: 22px;
  height: 170px;
  -ms-writing-mode: tb-rl;
  writing-mode: vertical-rl;
  border-left: solid 1px #000000;
  margin: 70px auto 70px;
}

.section4subtitle h3 {
  font-weight: lighter;
  font-size: 26px;
  font-weight: 400;
}

/* 共通margin設定 */
.content-space-top {
  margin-top: 100px;
}

/* section4img2の画像をパソコンでは横に4列、スマートフォンでは1列に配置 */
@media screen and (max-width: 767px) {
  main {
    margin-bottom: 150px;
  }

  .notbr {
    display: none;
  }

  .title {
    flex-direction: column;
  }

  .title {
    padding: 10px 5%;
    margin: 0px;
  }

  .title h2 {
    font-size: 25px;
    letter-spacing: 0.5vw;
  }

  .thumb-title > h1 {
    font-size: 6.5vw;
    padding: 2px 30px;
    border: 1.5px solid #fff;
  }

  .section4 {
    margin: 5%;
  }

  /* 右半分 */
  .section1 {
    background: linear-gradient(
      180deg,
      transparent 30%,
      transparent 0%,
      #dddddd 0%,
      #dddddd 0%
    );
    flex-direction: column;
    margin: 0px auto;
  }

  .sectionimg1 {
    width: 80%;
    padding: 20px 5% 20px 5%;
    margin: 20px 5%;
  }

  .sectionimg1 > img {
    width: 100%;
    height: auto;
  }

  .sectiontxt1 {
    width: 100%;
    text-align: center;
    margin: 0% 5% 40px 5%;
    padding: 0%;
    justify-content: center;
  }

  .sectiontxt1-1 h2 {
    font-size: 20px;
    margin: 0px 5%;
    letter-spacing: 0.1em;
  }

  .sectiontxt1-2 {
    margin: auto 5%;
  }

  /* 左半分 */
  .section2 {
    background: linear-gradient(
      180deg,
      transparent 30%,
      transparent 30%,
      #dddddd 0%,
      #f9f9f9 0%
    );
    flex-direction: column;
    margin: 0px auto;
  }

  .sectionimg2 {
    width: 80%;
    padding: 20px 5% 20px 5%;
    margin: 20px 5%;
  }

  .sectionimg2 > img {
    width: 100%;
    height: auto;
  }

  .sectiontxt2-2 {
    margin: auto 5%;
  }

  .sectiontxt2 {
    width: 100%;
    text-align: center;
    margin: 0% 5% 5% 5%;
    padding: 0%;
    justify-content: center;
  }

  .sectiontxt2-1 h2 {
    font-size: 20px;
    margin: auto 5%;
    letter-spacing: 0.1em;
  }

  .section3 {
    margin: 50px 5%;
    text-align: left;
  }

  .section4img2 {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
  }

  .section4img2-1 {
    width: 48%; /* 幅を調整して2列にする */
    margin: 1%;
  }

  .section5 {
    margin: 0%;
    text-align: left;
  }

  .section5 {
    line-height: normal;
  }

  .section5 > p {
    margin: 10px auto;
  }

  .section4subtitle {
    height: 110px;
  }

  .section4subtitle h3 {
    font-size: 27px;
    margin: auto 10px;
  }

  .thumb-title-sb > p {
    font-size: 15px;
    margin-top: 0px;
  }

  .nav {
    margin-left: 10px;
  }

  .content-space-top {
    margin-top: 0px;
  }
}