.page-content .knowledge-section {
  padding: 50px 0;
  overflow: hidden;
}
@media only screen and (max-width:767px) {
  .page-content .knowledge-section {
    padding: 30px 0;
  }
}
.page-content .knowledge-ttl-area {
  width: 100%;
  background: #EAECEC;
}
@media only screen and (max-width:767px) {
  .page-content .knowledge-ttl-area {
    margin-bottom: 80px;
  }
}
.page-content .knowledge-ttl-box {
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 1000px;
  height: 220px;
  margin: 0 auto;
  position: relative;
  box-sizing: border-box;
}
@media only screen and (max-width:960px) {
  .page-content .knowledge-ttl-box {
    width: 100%;
    height: 180px;
    padding: 0 20px;
  }
}
@media only screen and (max-width:767px) {
  .page-content .knowledge-ttl-box {
    justify-content: flex-end;
    height: 120px;
  }
}
.page-content .knowledge-ttl-box:after {
  content: "";
  width: 648px;
  height: 100%;
  position: absolute;
  top: 0;
  right: -120px;
  z-index: 1;
}
@media only screen and (max-width:960px) {
  .page-content .knowledge-ttl-box:after {
    width: auto;
    aspect-ratio: 3/1;
    right: -50px;
  }
}
.page-content .knowledge-ttl-en {
  font-size: 4.4rem;
  letter-spacing: 0.1em;
  color: #e30701;
  line-height: 1;
  font-weight: bold;
  margin-bottom: 0;
  margin-top: 0;
  position: relative;
  z-index: 2;
}
@media only screen and (max-width:960px) {
  .page-content .knowledge-ttl-en {
    font-size: 3.6rem;
  }
}
@media only screen and (max-width:767px) {
  .page-content .knowledge-ttl-en {
    margin-bottom: 5px;
    bottom: -30px;
  }
}
.page-content #knowledge-automotive .knowledge-ttl-box:after {
  background: url(/e/assets/img/knowledge/bg_knowledge_automotive.png) no-repeat center center/cover;
}
.page-content #knowledge-bearing .knowledge-ttl-box:after {
  background: url(/e/assets/img/knowledge/bg_knowledge_bearing.png) no-repeat center center/cover;
}
.page-content #knowledge-machine .knowledge-ttl-box:after {
  background: url(/e/assets/img/knowledge/bg_knowledge_machine.png) no-repeat center center/cover;
}
.page-content .knowledge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 40px 50px;
  margin-bottom: 80px;
}
@media only screen and (max-width:960px) {
  .page-content .knowledge-list {
    gap: 40px 30px;
  }
}
@media only screen and (max-width:767px) {
  .page-content .knowledge-list {
    flex-direction: column;
    margin-bottom: 50px;
  }
}
.page-content .knowledge-list-item {
  width: 300px;
}
@media only screen and (max-width:960px) {
  .page-content .knowledge-list-item {
    width: calc((100% - 60px) / 3);
  }
}
@media only screen and (max-width:767px) {
  .page-content .knowledge-list-item {
    width: 100%;
  }
}
.page-content .knowledge-list-image {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 169px;
  margin-bottom: 18px;
  position: relative;
}
@media only screen and (max-width:960px) {
  .page-content .knowledge-list-image {
    height: auto;
    aspect-ratio: 16/9;
  }
}
@media only screen and (max-width:767px) {
  .page-content .knowledge-list-image {
    margin-bottom: 10px;
  }
}
.page-content .knowledge-list-image a {
  display: block;
  height: 100%;
  position: relative;
  z-index: 2;
  transition: all 0.3s ease;
}
@media (hover: hover) and (pointer: fine) {
  .page-content .knowledge-list-image a:hover {
    opacity: 0.7;
  }
}
.page-content .knowledge-list-image a:before {
  content: "";
  width: 100%;
  height: 100%;
  border: 1px solid #e1e1e1;
  mix-blend-mode: darken;
  box-sizing: border-box;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
}
.page-content .knowledge-list-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-content .knowledge-list-txt {
  margin-bottom: 0;
  font-size: 1.4rem;
  line-height: 1.6;
}
@media only screen and (max-width:767px) {
  .page-content .knowledge-list-txt {
    font-size: 1.3rem;
  }
}
.page-content .knowledge-detail-header {
  margin-bottom: 80px;
}
@media only screen and (max-width:767px) {
  .page-content .knowledge-detail-header {
    margin-bottom: 50px;
    margin-top: 20px;
  }
}
.page-content .knowledge-detail-header .knowledge-detail-category {
  font-weight: bold;
  margin-bottom: 15px;
}
@media only screen and (max-width:767px) {
  .page-content .knowledge-detail-header .knowledge-detail-category {
    font-size: 1.4rem;
    margin-bottom: 10px;
  }
}
.page-content .knowledge-detail-header .knowledge-detail-ttl {
  font-size: 2.6rem;
  font-weight: bold;
  margin: 0;
}
@media only screen and (max-width:767px) {
  .page-content .knowledge-detail-header .knowledge-detail-ttl {
    font-size: 2rem;
  }
}
.page-content .knowledge-detail {
  margin-bottom: 80px;
}
.page-content .knowledge-detail img {
  max-width: 100%;
  height: auto;
}
.page-content .knowledge-detail p, .page-content .knowledge-detail ul, .page-content .knowledge-detail ol, .page-content .knowledge-detail table, .page-content .knowledge-detail dl {
  margin-bottom: 1.5em;
}
.page-content .knowledge-detail ol {
  padding-left: 0;
}
.page-content .back-btn a {
  width: 240px;
  height: 57px;
  margin: auto;
}