.materials_banner {
  max-width: 256rem;
  margin: 0 auto;
}
.materials_banner::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
  pointer-events: none;
  background-image: linear-gradient(to right, #000, transparent);
}
.materials_banner .flex {
  height: 100vh;
  max-height: 76.7rem;
  min-height: max-content;
  padding: 8rem 0;
}
.materials_banner .head {
  color: #fff;
  max-width: 59.4rem;
}
.materials_banner .head .subtitle {
  color: rgba(255, 255, 255, 0.8);
  font-size: 1.5rem;
  margin-bottom: 3rem;
}
.materials_banner .head .subtitle::before {
  width: 1.6rem;
  height: 1.6rem;
}
.materials_banner .head h1 {
  font-weight: 700;
  font-size: 6.4rem;
  line-height: 6.7rem;
}
.materials_banner .head h1 span {
  position: relative;
  z-index: 2;
  display: inline-block;
}
.materials_banner .head h1 span:after {
  content: '';
  width: 100%;
  height: 0.7rem;
  position: absolute;
  left: 0;
  bottom: 0.3rem;
  z-index: -1;
  background-color: var(--primary);
}
.materials_banner .head p {
  color: rgba(255, 255, 255, 0.84);
  font-size: 1.8rem;
  line-height: 2.8rem;
  font-weight: normal;
  margin-top: 2.2rem;
}
.materials_banner .head .btns {
  gap: 2rem;
  display: flex;
  flex-wrap: wrap;
  margin-top: 4.6rem;
}
.materials_intro {
  padding: 11.6rem 0 12rem;
}
.materials_intro .head {
  max-width: 82rem;
}
.materials_intro .flex {
  margin-top: 5rem;
}
.materials_intro .img {
  width: 42.013889%;
  border-radius: 1.2rem;
}
.materials_intro .tcon {
  flex: 1;
  max-width: 71.5rem;
}
.materials_intro .tcon p {
  color: #353535;
  font-size: 1.8rem;
  line-height: 2.8rem;
  margin-top: 1.2rem;
  font-weight: 500;
}
.materials_intro .tcon p:first-child {
  margin-top: 0;
}
.materials_main {
  padding: 11.6rem 0 12rem;
  background-color: #f7fafc;
}
.materials_main .head {
  max-width: 130.5rem;
}
.materials_main .head h2 {
  max-width: 85rem;
}
.materials_main .head p {
  margin-top: 3rem;
}
.materials_main .list {
  margin-top: 5.5rem;
}
.materials_main .list .material_list {
  display: grid;
  gap: 5rem 1.875%;
  grid-template-columns: repeat(3, 1fr);
}
.materials_main .material_list .active a {
  box-shadow: 0.8rem 0.87rem 1rem rgba(165, 165, 165, 0.24);
}
.materials_main .material_list a {
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: all 0.3s;
  border-radius: 0.8rem;
  border: 1px solid #e8e5f0;
  background-color: #fff;
  overflow: hidden;
}
.materials_main .material_list a:hover .img img {
  transform: scale(1.03);
}
.materials_main .material_list .image {
  position: relative;
  border-radius: 0.8rem;
}
.materials_main .material_list .image .img {
  padding-bottom: 52.173913%;
}
.materials_main .material_list .image .icon {
  position: absolute;
  left: 1.5rem;
  bottom: 1.5rem;
  z-index: 2;
  width: max(13.043478%, 40px);
  padding-bottom: max(13.043478%, 40px);
  border-radius: 0.4rem;
  background-color: var(--primary);
}
.materials_main .material_list .image .icon img {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: block;
  width: 50%;
  height: 50%;
  object-fit: contain;
}
.materials_main .material_list .info {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 3rem 3rem 2.5rem;
}
.materials_main .material_list .info .title {
  font-size: 2.5rem;
  line-height: 3rem;
  font-weight: 600;
  -webkit-line-clamp: 2;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}
.materials_main .material_list .info .desc {
  color: rgba(10, 10, 10, 0.85);
  font-size: 1.5rem;
  line-height: 2.2rem;
  min-height: 6.6rem;
  margin-top: 1.3rem;
  -webkit-line-clamp: 3;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}
.materials_main .material_list .info .tags {
  font-weight: 600;
  margin-bottom: auto;
  margin-top: 1.6rem;
}
.materials_main .material_list .info .tags ul {
  gap: 2px 1rem;
  display: flex;
  flex-wrap: wrap;
}
.materials_main .material_list .info .tags li:first-child {
  gap: 1rem;
  display: flex;
  align-items: center;
}
.materials_main .material_list .info .tags li:first-child::after {
  content: '';
  display: block;
  width: 2px;
  height: 2px;
  border-radius: 50%;
  background-color: var(--title);
}
.materials_main .material_list .info .explore {
  gap: 2rem;
  display: flex;
  align-items: center;
  max-width: max-content;
  font-weight: 600;
  text-transform: uppercase;
  margin-top: 3rem;
}
.materials_main .material_list .info .explore::after {
  content: '';
  display: block;
  width: 1.4rem;
  height: 1.4rem;
  transition: all 0.3s;
  background: url(../images/btn_arrow.svg) no-repeat center / contain;
  transform: translateY(-1px);
}
.materials_main .material_list .info .explore:hover::after {
  transform: translate(5px, -1px);
}
.materials_engineering {
  max-width: 256rem;
  margin: 0 auto;
  padding: 11.6rem 0 12rem;
  background-color: #000;
}
.materials_engineering.img_bg > img {
  opacity: 0.1;
}
.materials_engineering .head {
  max-width: 130.5rem;
}
.materials_engineering .head .subtitle {
  color: #fff;
}
.materials_engineering .head h2 {
  color: #fff;
  max-width: 104rem;
}
.materials_engineering .head p {
  color: rgba(255, 255, 255, 0.74);
  font-weight: 300;
  margin-top: 3rem;
}
.materials_engineering .table {
  margin-top: 5.4rem;
  border-radius: 0.8rem;
  background-color: #fff;
  padding: 3.125% 3.402778% 2.916667% 2.916667%;
}
.materials_engineering .table table {
  border-spacing: 0;
  border-collapse: separate;
}
.materials_engineering .table table th {
  text-align: left;
  font-weight: 600;
  font-size: 2.1rem;
  padding: 1.6rem 3rem;
  background-color: var(--primary);
  border-right: 1px solid rgba(0, 0, 0, 0.14);
}
.materials_engineering .table table th:first-child {
  border-top-left-radius: 0.4rem;
}
.materials_engineering .table table th:last-child {
  border-right: none;
  border-top-right-radius: 0.4rem;
}
.materials_engineering .table table tbody tr:last-child td:first-child {
  border-bottom-left-radius: 0.4rem;
}
.materials_engineering .table table tbody tr:last-child td:last-child {
  border-bottom-right-radius: 0.4rem;
}
.materials_engineering .table table td {
  padding: 1.2rem 3rem;
  font-weight: 500;
  font-size: 1.7rem;
  line-height: 2.4rem;
  border-right: 1px solid rgba(0, 0, 0, 0.14);
  border-bottom: 1px solid rgba(0, 0, 0, 0.14);
}
.materials_engineering .table table td:first-child {
  border-left: 1px solid rgba(0, 0, 0, 0.14);
}
.materials_structure {
  padding: 11.6rem 0 12rem;
}
.materials_structure .head {
  max-width: 130.5rem;
}
.materials_structure .head h2 {
  max-width: 61rem;
}
.materials_structure .head p {
  margin-top: 3rem;
}
.materials_structure .items {
  --size: 7.6rem;
  margin-top: 6.4rem;
  position: relative;
  z-index: 2;
}
.materials_structure .items::before {
  content: '';
  display: block;
  width: calc(100% + 4rem);
  height: 3px;
  position: absolute;
  left: -4rem;
  top: calc(var(--size) / 2);
  z-index: -1;
  max-width: 138.8rem;
  background: url(../images/dot-line.svg) repeat left center / contain;
}
.materials_structure .items .list {
  display: flex;
  gap: 8.194444%;
}
.materials_structure .items .item {
  flex: 1;
  max-width: 33.8rem;
}
.materials_structure .items .item .icon {
  width: var(--size);
  height: var(--size);
  border-radius: 0.6rem;
  background-color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
}
.materials_structure .items .item .icon img {
  display: block;
  width: 60%;
  height: 60%;
  object-fit: contain;
}
.materials_structure .items .item h3 {
  font-weight: 600;
  font-size: 2.6rem;
  line-height: 3rem;
  margin-top: 3.5rem;
}
.materials_structure .items .item ul {
  margin-top: 2.2rem;
}
.materials_structure .items .item li {
  position: relative;
  padding-left: 1.125em;
}
.materials_structure .items .item li::before {
  content: '';
  display: block;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background-color: var(--title);
  position: absolute;
  left: 0;
  top: 0.5em;
}
.materials_safe {
  margin-bottom: 2.3rem;
  padding: 11.6rem 0 4.6rem;
  background-color: #f6fafd;
}
.materials_safe .head {
  max-width: 122.4rem;
}
.materials_safe .head h2 {
  max-width: 66rem;
}
.materials_safe .head p {
  margin-top: 3rem;
}
.materials_safe .materials_safe_swiper {
  overflow: hidden;
  margin-top: 6.4rem;
}
.materials_safe .materials_safe_swiper .img {
  padding-bottom: 100%;
  border-radius: 0.8rem;
}
.materials_safe .materials_safe_swiper h3 {
  text-align: center;
  font-size: 2.2rem;
  font-weight: 500;
  margin-top: 1.4rem;
  padding: 0 1rem;
}
.materials_safe .swiper-pagination {
  margin-top: 5.2rem;
}
@media screen and (max-width: 768px) {
  .materials_banner .flex {
    height: auto;
    padding: 50px 0;
  }
  .materials_banner .head .subtitle {
    margin-bottom: 10px;
    font-size: 14px;
  }
  .materials_banner .head h1 {
    font-size: 25px;
    line-height: 1.3;
  }
  .materials_banner .head h1 span::after {
    height: 3px;
  }
  .materials_banner .head p {
    font-size: 14px;
    line-height: 1.5;
    margin-top: 12px;
  }
  .materials_banner .head .btns {
    margin-top: 20px;
  }
  .materials_intro {
    padding: 50px 0;
  }
  .materials_intro .flex {
    margin-top: 30px;
  }
  .materials_intro .tcon p {
    font-size: 14px;
    line-height: 1.5;
  }
  .materials_main {
    padding: 50px 0;
  }
  .materials_main .head p {
    margin-top: 12px;
  }
  .materials_main .list {
    margin-top: 30px;
  }
  .materials_main .list .material_list {
    gap: 30px 12px;
  }
  .materials_main .material_list .info {
    padding: 20px;
  }
  .materials_main .material_list .info .title {
    font-size: 16px;
    line-height: 1.3;
  }
  .materials_main .material_list .info .desc {
    font-size: 13px;
    line-height: 1.5;
    margin-top: 10px;
    min-height: unset;
    -webkit-line-clamp: 2;
  }
  .materials_main .material_list .info .tags {
    font-size: 12px;
    margin-top: 10px;
  }
  .materials_main .material_list .info .tags ul {
    gap: 2px 6px;
  }
  .materials_main .material_list .info .tags li:first-child {
    gap: 6px;
  }
  .materials_main .material_list .info .explore {
    gap: 15px;
    font-size: 14px;
    margin-top: 15px;
  }
  .materials_main .material_list .info .explore::after {
    width: 10px;
    height: 10px;
  }
  .materials_engineering {
    padding: 50px 0;
  }
  .materials_engineering .head p {
    margin-top: 12px;
  }
  .materials_engineering .table {
    padding: 10px;
    margin-top: 30px;
  }
  .materials_engineering .table table th {
    padding: 10px;
    font-size: 14px;
    line-height: 1.5;
  }
  .materials_engineering .table table td {
    padding: 10px;
    font-size: 13px;
    line-height: 1.5;
  }
  .materials_structure {
    padding: 50px 0;
  }
  .materials_structure .head p {
    margin-top: 12px;
  }
  .materials_structure .items {
    margin-top: 30px;
    --size: 50px;
  }
  .materials_structure .items .list {
    gap: 20px;
  }
  .materials_structure .items .item h3 {
    font-size: 18px;
    line-height: 1.3;
    margin-top: 20px;
  }
  .materials_structure .items .item ul {
    margin-top: 12px;
  }
  .materials_safe {
    padding: 50px 0;
    margin-bottom: 0;
  }
  .materials_safe .head p {
    margin-top: 12px;
  }
  .materials_safe .materials_safe_swiper {
    margin-top: 30px;
  }
  .materials_safe .materials_safe_swiper h3 {
    font-size: 14px;
    line-height: 1.3;
    margin-top: 15px;
  }
  .materials_safe .swiper-pagination {
    margin-top: 30px;
  }
}
@media screen and (max-width: 576px) {
  .materials_intro .flex {
    display: block;
  }
  .materials_intro .img {
    width: 100%;
    margin-bottom: 30px;
  }
  .materials_main .list .material_list {
    grid-template-columns: 1fr;
  }
  .materials_engineering .table {
    padding: 6px;
  }
  .materials_engineering .table table th {
    padding: 6px;
    font-size: 13px;
  }
  .materials_engineering .table table td {
    padding: 6px;
    font-size: 12px;
  }
  .materials_structure .items .list {
    width: calc(100% + 40px);
    padding: 0 20px;
    margin: 0 -20px;
    overflow: auto;
  }
  .materials_structure .items .list::-webkit-scrollbar {
    display: none;
  }
  .materials_structure .items .item {
    flex: 1 0 200px;
  }
  .materials_safe {
    overflow: hidden;
  }
  .materials_safe .materials_safe_swiper {
    overflow: visible;
  }
}