.top-wrap {
  position: relative;
  background-image: url(../img/dioxin_002.jpg);
  background-position: 20% 20%;
  background-size: cover;
  padding: 150px 0;
  isolation: isolate; /* 念のため。擬似要素の重なりを安定させる */
}
.about-wrap {
  margin: 60px auto;
}
.title {
  width: 100%;
  font-family: "Rajdhani", sans-serif;
  line-height: 1.5;
  display: block;
}
.title h3 {
  font-weight: 600;
  font-style: normal;
  font-size: 31px;
  color: #004fa4;
}
.title p {
  font-size: 18px;
  font-weight: bold;
  border-left: 5px solid #004fa4; /*線の設定*/
  padding: 1px 5px;
  line-height: 0.8;
}
.sprayed-wrap {
  margin: 60px auto;
}
.sprayed-wrap__body {
  max-width: 760px;
  margin: 30px auto;
}
.sprayed-wrap__body__item {
  margin-bottom: 60px;
}
.sprayed-wrap__body__item__head {
  width: 100%;
}
.sprayed-wrap__body__item__head h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 15px;
  color: #004fa4;
  position: relative;
  padding: 0.25em 1em;
  line-height: 1.6;
  text-align: center;
}
.sprayed-wrap__body__item__head h4:before,
.sprayed-wrap__body__item__head h4:after {
  content: "";
  width: 20px;
  height: 30px;
  position: absolute;
  display: inline-block;
}
.sprayed-wrap__body__item__head h4:before {
  border-left: solid 2px #5767bf;
  border-top: solid 2px #5767bf;
  top: 0;
  left: 0;
}
.sprayed-wrap__body__item__head h4:after {
  border-right: solid 2px #5767bf;
  border-bottom: solid 2px #5767bf;
  bottom: 0;
  right: 0;
}
.sprayed-wrap__body__item__head h4 p {
  margin: 0;
  padding: 0;
}
.sprayed-wrap__body__item__txt {
  font-size: 14px;
  line-height: 1.8;
}
.sprayed-wrap__body__item__imggroup {
  display: flex;
  justify-content: space-around;
  margin-top: 20px;
}
/* これを付けた画像だけグレーにする */
.gray {
  -webkit-filter: grayscale(100%);
  filter: grayscale(100%);
  transition:
    filter 0.5s ease-in-out,
    -webkit-filter 0.5s ease-in-out; /* なめらか */
  will-change: filter;
}

/* 100%見えて1秒後にカラー化 */
.gray.is-color {
  -webkit-filter: grayscale(0%);
  filter: grayscale(0%);
}

.sprayed-wrap__body__item__imggroup p {
  font-size: 14px;
  text-align: center;
  font-weight: 400;
}
.dioxin-wrap {
  margin: 60px auto;
}
.dioxin-wrap__body {
  max-width: 760px;
  margin: 30px auto;
}
.dioxin-wrap__body__item {
  margin-bottom: 30px;
}
.dioxin-wrap__body__item__head {
  width: 100%;
}
.dioxin-wrap__body__item__head h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 20px;
  color: #004fa4;
  position: relative;
  padding: 0.25em 1em;
  line-height: 1.6;
  text-align: center;
}
.dioxin-wrap__body__item__head h4:before,
.dioxin-wrap__body__item__head h4:after {
  content: "";
  width: 20px;
  height: 30px;
  position: absolute;
  display: inline-block;
}
.dioxin-wrap__body__item__head h4:before {
  border-left: solid 2px #5767bf;
  border-top: solid 2px #5767bf;
  top: 0;
  left: 0;
}
.dioxin-wrap__body__item__head h4:after {
  border-right: solid 2px #5767bf;
  border-bottom: solid 2px #5767bf;
  bottom: 0;
  right: 0;
}
.dioxin-wrap__body__item__head h4 p {
  margin: 0;
  padding: 0;
}
.dioxin-wrap__body__item__txt {
  font-size: 14px;
  line-height: 1.8;
  font-weight: 500;
}
.sprayed-wrap__body__item__imggroup {
  display: flex;
  justify-content: space-around;
  margin-top: 20px;
}
.sprayed-wrap__body__item__imggroup p {
  font-size: 14px;
  text-align: center;
  font-weight: 300;
}
.dioxin-wrap__body__item__txt__list ul {
  margin: 10px 0 20px 0;
  width: 90%;
  padding-left: 40px;
}
.dioxin-wrap__body__item__txt__list li {
  font-size: 14px;
  line-height: 2;
  width: 90%;
  list-style: disc;
}
.dioxin-wrap__body__item__txt__list__item__head {
  font-size: 16px;
  font-weight: 600;
  margin: 20px 0 5px 0;
  color: #004fa4;
}
.jet-wrap {
  margin: 60px auto;
}
.jet-wrap__body__item__head {
  width: 100%;
}
.jet-wrap__body__item__head h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 15px;
  color: #004fa4;
  position: relative;
  padding: 0.25em 1em;
  line-height: 1.6;
  text-align: center;
}
.jet-wrap__body__item__head h4:before,
.jet-wrap__body__item__head h4:after {
  content: "";
  width: 20px;
  height: 30px;
  position: absolute;
  display: inline-block;
}
.jet-wrap__body__item__head h4:before {
  border-left: solid 2px #5767bf;
  border-top: solid 2px #5767bf;
  top: 0;
  left: 0;
}
.jet-wrap__body__item__head h4:after {
  border-right: solid 2px #5767bf;
  border-bottom: solid 2px #5767bf;
  bottom: 0;
  right: 0;
}
.jet-wrap__body__item__head h4 p {
  margin: 0;
  padding: 0;
}
.jet-wrap__body {
  max-width: 760px;
  margin: 30px auto;
}
.jet-wrap__body__item__txt__lead {
  font-size: 18px;
  font-weight: 600;
  margin: 20px 0 5px 0;
  color: #004fa4;
}
.jet-wrap__body__item__img {
  display: flex;
  justify-content: center;
  margin-top: 20px;
  flex-direction: column;
}
.jet-wrap__body__item__img p {
  font-size: 14px;
  text-align: center;
  margin-bottom: 1px;
  font-weight: 500;
}
.jet-wrap__body__item__list {
  width: 85%;
  margin: 15px auto 40px auto;
}
.jet-wrap__body__item__list p {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 3px;
}
.jet-wrap__body__item__img img {
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
}
.jet-wrap__body__item__list__item {
  width: 85%;
  background: #fffcf4;
  border-radius: 8px;
  box-shadow: 0px 0px 5px silver;
  padding: 15px 0px 20px 40px;
  margin: 5px auto 15px auto;
  font-size: 15px;
  font-weight: 400;
}
.jet-wrap__body__item__txt__txt {
  font-size: 14px;
  line-height: 1.8;
  font-weight: 500;
}
.Corrosion-wrap {
  margin: 60px auto;
}
.Corrosion-wrap__body {
  max-width: 760px;
  margin: 30px auto;
}
.Corrosion-wrap__body__item {
  display: flex;
  margin: 20px auto;
  flex-direction: column;
}
.Corrosion-wrap__body__item__head {
  font-size: 18px;
  font-weight: 600;
}
ol.Corrosion-wrap__body__item__list {
  background-color: #fff;
  counter-reset: list;
  list-style: none;
  padding: 0;
  width: 100%;
  font-size: 14px;
  line-height: 1.6;
  padding: 20px;
}
ol.Corrosion-wrap__body__item__list ol {
  margin: 0 0 0 40px;
}

.Corrosion-wrap__body__item__list a {
  position: relative;
  display: block;
  text-decoration: none;
  padding: 10px 6px 10px 14px;
  margin: 3px 0 20px 40px;
  background: #f1f8ff;
  color: #000000;
  font-weight: 500;
  transition: all 0.3s ease-out;
}

.Corrosion-wrap__body__item__list a:hover {
  background: #ffd9d3;
}

.Corrosion-wrap__body__item__list a:before {
  content: counter(list);
  counter-increment: list;
  position: absolute;
  left: -45px;
  top: 45%;
  height: 32px;
  width: 32px;
  margin-top: -1em;
  background: #004fa4;
  line-height: 30px;
  text-align: center;
  font-weight: bold;
  color: #fff;
  border-radius: 99px;
}

.Corrosion-wrap__body__item__list a:after {
  content: "";
  position: absolute;
  left: -24px;
  top: 45%;
  margin-top: -6px;
  border: 8px solid transparent;
  transition: all 0.3s ease-out;
}

.Corrosion-wrap__body__item__list a:hover:after {
  left: -10px;
  border-left-color: #004fa4;
}
@-webkit-keyframes borderFadeIn {
  0% {
    opacity: 0;
    transform: translateY(-8px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes borderFadeIn {
  0% {
    opacity: 0;
    transform: translateY(-8px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}
.Corrosion-wrap__body__item__list p {
  font-size: 16px;
  font-weight: 500;
  margin-left: 42px;
}
.Corrosion-wrap__body__item__head {
  width: 100%;
}
.Corrosion-wrap__body__item__head h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 15px;
  color: #004fa4;
  position: relative;
  padding: 0.25em 1em;
  line-height: 1.6;
  text-align: center;
}
.Corrosion-wrap__body__item__head h4:before,
.Corrosion-wrap__body__item__head h4:after {
  content: "";
  width: 20px;
  height: 30px;
  position: absolute;
  display: inline-block;
}
.Corrosion-wrap__body__item__head h4:before {
  border-left: solid 2px #5767bf;
  border-top: solid 2px #5767bf;
  top: 0;
  left: 0;
}
.Corrosion-wrap__body__item__head h4:after {
  border-right: solid 2px #5767bf;
  border-bottom: solid 2px #5767bf;
  bottom: 0;
  right: 0;
}
.Corrosion-wrap__body__item__head h4 p {
  margin: 0;
  padding: 0;
}
@media (max-width: 1100px) {
  .sprayed-wrap__body,
  .dioxin-wrap__body,
  .jet-wrap__body,
  .Corrosion-wrap__body {
    max-width: 85%;
  }
  .gray {
    width: 90%;
  }
}
@media (max-width: 767px) {
  .sprayed-wrap__body,
  .dioxin-wrap__body,
  .jet-wrap__body,
  .Corrosion-wrap__body {
    max-width: 100%;
  }
  .sprayed-wrap__body__item__head h4,
  .dioxin-wrap__body__item__head h4,
  .jet-wrap__body__item__head h4,
  .Corrosion-wrap__body__item__head h4 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 15px;
  }
  .dioxin-wrap__body__item__txt__list__item__head {
    font-size: 16px;
    font-weight: 500;
  }
  .jet-wrap__body__item__list p {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 3px;
  }
}
@media (max-width: 540px) {
  .top-wrap {
    padding: 60px 0;
  }
  .title h3 {
    font-size: 24px;
  }
  .title p {
    font-size: 12px;
  }
  .Corrosion-wrap__body__item__list p {
    font-size: 14px;
    font-weight: 500;
    margin-left: 42px;
  }
  ol.Corrosion-wrap__body__item__list {
    background-color: #fff;
    list-style: none;
    padding: 0;
    width: 95%;
    font-size: 12px;
    line-height: 1.5;
    padding: 10px;
    margin: 0 auto;
  }
  .sprayed-wrap__body__item__head h4,
  .dioxin-wrap__body__item__head h4,
  .jet-wrap__body__item__head h4,
  .Corrosion-wrap__body__item__head h4 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 15px;
    display: inline-block;
    text-align: left;
  }
  .jet-wrap__body__item__txt__lead {
    font-size: 14px;
    font-weight: 600;
    margin: 20px 0 5px 0;
    color: #004fa4;
  }
}