.materialsDownload {
  width: 100%;
  padding: 50px 0 100px;
  background: #fff;
}
.materialsDownload_search {
  width: 630px;
  margin: 0 auto;
  max-width: 100%;
}
.materialsDownload_search form {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.materialsDownload_search form input {
  width: calc(100% - 170px);
  height: 50px;
  border-radius: 50px;
  background: #f8f8fa;
  text-indent: 2em;
  border: none;
  outline: none;
}
.materialsDownload_search form input::placeholder {
  color: #b2b2b2;
}
.materialsDownload_search form .button {
  width: 150px;
  height: 50px;
  border-radius: 50px;
  background: #81ccdb;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 18px;
  font-weight: 500;
}

.materialsDownload .materialsDownload_cen {
  margin-top: 40px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap-reverse;
}

.materialsDownload .materialsDownload_cen .materialsDownload_l {
  width: 260px;
}
.materialsDownload .materialsDownload_cen .materialsDownload_l .materials_box {
  width: 100%;
  padding: 30px 0 20px;
  border-bottom: 1px solid #e6e6e6;
}
.materials_box .materialsBox_top {
  display: flex;
  justify-content: space-between;
  font-size: 18px;
  line-height: 20px;
  font-weight: bold;
  color: #333333;
  cursor: pointer;
}
.materials_box .materialsBox_top .materialsBox_name {
  width: calc(100% - 30px);
}
.materials_box .materialsBox_top .iconfont {
  font-size: 18px;
  line-height: 20px;
  transition: all 0.3s ease;
}

.materials_box.act .materialsBox_top .iconfont {
  transform: rotate(180deg);
}
.materials_box .materialsBox_bom {
  width: 100%;
  padding-top: 20px;
  display: none;
}
.materials_box.act .materialsBox_bom {
  display: block;
}
.materials_box .materialsBox_bom a {
  display: flex;
  justify-content: space-between;
  color: #666666;
  margin-bottom: 16px;
}
.materials_box .materialsBox_bom a input {
  margin-top: 2px;
}
.materials_box .materialsBox_bom a label {
  display: block;
  width: calc(100% - 18px);
  font-size: 15px;
}

.materialsDownload .materialsDownload_cen .materialsDownload_r {
  width: calc(100% - 310px);
  display: flex;
  flex-wrap: wrap;
}
.materialsDownload_box {
  width: 23.5%;
  margin-right: 2%;
  box-shadow: 0 0 16px rgba(0, 0, 0, 0.1);
  padding: 30px;
  border-radius: 16px;
  margin-bottom: 30px;
}
.materialsDownload_box:nth-child(4n) {
  margin-right: 0;
}
.materialsDownload_box .materialsDownload_prc {
  width: 100%;
  aspect-ratio: 230/220;
  display: flex;
  align-items: center;
  justify-content: center;
}
.materialsDownload_box .materialsDownload_prc img {
  display: block;
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
  transition: all 0.3s;
}
.materialsDownload_box:hover .materialsDownload_prc img {
  transform: scale(1.1);
}
.materialsDownload_box .materialsDownload_name {
  width: 100%;
  border-bottom: 1px solid #e6e6e6;
  padding-bottom: 8px;
  min-height: 40px;
  line-height: 20px;
  font-size: 16px;
  font-weight: 500;
  color: #333333;
}
.materialsDownload_box .materialsDownload_text {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 25px 0 20px;
}
.materialsDownload_box .materialsDownload_text .time {
  font-size: 14px;
  line-height: 20px;
  color: #999999;
  font-weight: 500;
}
.materialsDownload_box .materialsDownload_text .iconfont {
  color: #333333;
}
.materialsDownload_r .fyq {
  padding-top: 20px;
}

/* 响应式设计 */
@media (max-width: 1500px) {
  .materialsDownload {
    padding: 40px 0 80px;
  }
  .materialsDownload_box {
    width: 23.5%;
    margin-right: 2%;
    padding: 25px;
  }
  .materials_box .materialsBox_top {
    font-size: 17px;
  }
  .materials_box .materialsBox_bom a label {
    font-size: 14px;
  }
}

@media (max-width: 1200px) {
  .materialsDownload_search {
    width: 580px;
  }
  .materialsDownload_box {
    width: 23.4%;
    margin-right: 2.13%;
    padding: 22px;
  }
  .materialsDownload_box .materialsDownload_prc {
    aspect-ratio: 200/190;
  }
  .materialsDownload_box .materialsDownload_name {
    font-size: 15px;
  }
  .materialsDownload .materialsDownload_cen .materialsDownload_l {
    width: 240px;
  }
  .materialsDownload .materialsDownload_cen .materialsDownload_r {
    width: calc(100% - 290px);
  }
}

@media (max-width: 992px) {
  .materialsDownload {
    padding: 30px 0 60px;
  }
  .materialsDownload .materialsDownload_cen {
    flex-direction: column;
  }
  .materialsDownload .materialsDownload_cen .materialsDownload_l {
    width: 100%;
    margin-bottom: 30px;
  }
  .materialsDownload .materialsDownload_cen .materialsDownload_r {
    width: 100%;
  }
  .materialsDownload_box {
    width: 31.5%;
    margin-right: 2.75%;
    margin-bottom: 25px;
  }
  .materialsDownload_box:nth-child(4n) {
    margin-right: 2.75%;
  }
  .materialsDownload_box:nth-child(3n) {
    margin-right: 0;
  }
  .materials_box .materialsBox_top {
    font-size: 16px;
  }
}

@media (max-width: 768px) {
  .materialsDownload {
    padding: 30px 20px;
  }
  .materialsDownload_search {
    width: 100%;
  }
  .materialsDownload_search form {
    flex-direction: column;
    align-items: stretch;
  }
  .materialsDownload_search form input {
    width: 100%;
    margin-bottom: 15px;
  }
  .materialsDownload_search form .button {
    width: 100%;
  }
  .materialsDownload .materialsDownload_cen {
    margin-top: 30px;
  }
  .materialsDownload_box {
    width: 48%;
    margin-right: 4%;
    margin-bottom: 20px;
    padding: 20px;
  }
  .materialsDownload_box:nth-child(3n) {
    margin-right: 4%;
  }
  .materialsDownload_box:nth-child(2n) {
    margin-right: 0;
  }
  .materialsDownload_box .materialsDownload_prc {
    aspect-ratio: 4/3;
  }
  .materialsDownload_box .materialsDownload_name {
    font-size: 14px;
  }
  .materialsDownload_box .materialsDownload_text {
    padding: 20px 0 15px;
  }
  .materials_box .materialsBox_top {
    font-size: 15px;
  }
  .materials_box .materialsBox_bom a label {
    font-size: 13px;
  }
}