.knowledge .top {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 402px;
  /* width: 1536px; */
  margin: auto;
  background-image: url(../knowledge-top.jpg);
  background-repeat: no-repeat;
  background-position: 100% 100%;
  background-size: cover;
}
.knowledge .top h2 {
  /* padding-top: 94px; */
  width: 1100px;
  /* margin: auto; */
  font-size: 49px;
  font-family: PingFang SC;
  font-weight: 600;
  color: #FFFFFF;
  line-height: 96px;
  letter-spacing: 1px;
}
.knowledge .top p {
  margin-top: 10px;
  width: 1100px;
  /* margin: auto; */
  margin-bottom: 30px;
  font-size: 20px;
  font-family: PingFang SC;
  /* font-weight: 600; */
  color: #FFFFFF;
  line-height: 32px;
  letter-spacing: 1px;
}
.knowledge .top .top-btn {
  margin-left: 288px;
  width: 121px;
  height: 37px;
  text-align: center;
  line-height: 37px;
  border-radius: 5px;
  background: #FFFFFF;
  border: 1px solid #E6E8EB;
  font-size: 13px;
}
.knowledge h3 {
  max-width: 624px;
  height: 47px;
  font-size: 30px;
  font-family: PingFang SC;
  /* font-weight: 600; */
  color: #000000;
  /* line-height: 45px; */
  margin: 0 auto 60px;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background-image: url(../image/bg/Product-Information.png);
  background-repeat: no-repeat;
  background-position: 100% 100%;
  background-size: cover;
}
.knowledge .knowledge-wrap {
  padding-top: 60px;
  background-image: url(../image/bg/customerCase-swiper-bg.png);
  background-repeat: no-repeat;
  background-position: 100% 100%;
  background-size: cover;
}
.knowledge .tab {
  display: flex;
  align-items: center;
  justify-content: space-evenly;
  width: 560px;
  margin: auto;
  margin-bottom: 60px;
}
.knowledge .tab li {
  font-size: 24px;
  font-family: PingFangTC;
  /* font-weight: 700; */
  color: #000;
  line-height: 36px;
  position: relative;
  cursor: pointer;
}
.knowledge .tab a{
  outline: none;
  text-decoration: none;
}
.knowledge .tab li.active {
  color: #0074FF;
}
.knowledge .tab li.active:after {
  content: ' ';
  width: 70px;
  height: 2px;
  border-bottom: 2px solid #0074ff;
  position: absolute;
  bottom: -4px;
  left: 50%;
  margin-left: -35px;
}

.knowledge .soduku-wrap {
  display:flex;
  align-items:center;
  justify-content: flex-start;
  flex-wrap:wrap;
  max-width: 1100px;
  margin: auto;
  margin-bottom: 20px;
}
.knowledge .soduku-wrap .soduku-item {
  width: 266px;
  height: 330px;
  overflow: hidden;
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom: 16px;
  box-shadow: 1px 4px 8px 0 rgb(1 15 57 / 20%);
  cursor: pointer;
  /* background:lightblue; */
}
.knowledge .leftTab .soduku-item {
  position: relative;
  margin-right: 8px;
}
.knowledge .leftTab .soduku-item .mantle {
  width: 100%;
  position: absolute;
  /* padding: 20px; */
  color: #000;
  font-size: 20px;
  display: none;
  bottom: 0;
  left: 0;
}
.knowledge .leftTab .soduku-item .mantle img {
  width: 22px;
  height: 22px;
}
.knowledge .leftTab .soduku-item .mantle .title-mantle{
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 8px 16px 8px;
}
.knowledge .leftTab .soduku-item .mantle p {
  margin-left: 16px;
  margin-right: 16px;
  font-size: 14px;
  line-height: 20px;
}
.knowledge .leftTab .soduku-item:hover .mantle {
  display: block;
  width: 100%;
  height: 110px;
  position: absolute;
  z-index: 4;
  /* background: linear-gradient(to bottom, rgba(255, 255, 255, 0.55) 60%, rgba(0, 0, 0, 0.34) 100%); */
  opacity: 0.76;
  background-color: rgba(255,255,255, 0.76);
  
}
.knowledge .centerTab {
  display: none;
  max-width: 1100px;
}
.knowledge .centerTab .soduku-item {
  width: 262px;
  height: 306px;
  overflow: hidden;
  display:flex;
  flex-direction: column;
  align-items:center;
  justify-content:flex-start;
  margin-bottom: 13px;
  /* background:lightblue; */
  border-radius: 5px 5px 0px 0px;
  box-shadow: 0px 2px 3px 0px rgba(0,0,0,0.2);
  /* background: #FFFFFF; */
  margin-right: 12px;
}
.knowledge .centerTab .soduku-item .text-content {
  background-color: #fff;
  padding-top: 13px;
}

.knowledge .centerTab .soduku-item img {
  width: 262px;
  height: 160px;
  margin-top: 0;
}
.knowledge .centerTab .soduku-item .title {
  height: 46px;
  font-size: 16px;
  font-family: PingFangSC-Regular, PingFang SC;
  font-weight: 400;
  color: #000000;
  line-height: 22px;
  padding-left: 8px;
  padding-right: 8px;
  margin-bottom: 8px;
  overflow: hidden;
  display: -webkit-box;
  text-overflow: ellipsis;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}
.knowledge .centerTab .soduku-item p {
  /* text-align: center; */
  font-size: 12px;
  font-family: PingFangSC-Regular, PingFang SC;
  font-weight: 400;
  color: #000000;
  line-height: 17px;
  padding-left: 8px;
  padding-right: 8px;
  margin-bottom: 10px;
}
.knowledge .centerTab .soduku-item .desc {
  max-height: 98px;
  overflow: hidden;
  display: -webkit-box;
  text-overflow: ellipsis;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.knowledge .rightTab {
  display: none;
}
.knowledge .rightTab .soduku-item {
  position: relative;
  width: 354px;
  height: 268px;
  overflow: hidden;
  display:flex;
  flex-direction: column;
  align-items:flex-start;
  justify-content:flex-start;
  margin-bottom: 38px;
  /* background:lightblue; */
  border-radius: 5px 5px 0px 0px;
  box-shadow: 0px 2px 3px 0px rgba(0,0,0,0.2);
  /* background: #FFFFFF; */
  margin-right: 10px;
}
.knowledge .rightTab .soduku-item div {
  margin: 14px 10px 8px;
  font-size: 16px;
  font-family: PingFangSC-Regular, PingFang SC;
  font-weight: 400;
  color: #000000;
  line-height: 18px;
}
.knowledge .rightTab .soduku-item p {
  margin-left: 10px;
  font-size: 10px;
  font-family: PingFangSC-Regular, PingFang SC;
  font-weight: 400;
  color: #000000;
  line-height: 14px;
}
.knowledge .soduku-item img {
  width: 100%;
  height: 100%;
}
.knowledge .rightTab .soduku-item img  {
  width: 100%;
  height: 194px;
}
.knowledge .rightTab .soduku-item img.play-icon {
  width: 98px;
  height: 98px;
  position: absolute;
  top: 44px;
  left: 50%;
  margin-left: -49px;
}

.knowledge .annex-down {
  /* max-width: 1536px; */
  height: 510px;
  background-color: #999;
  margin: auto;
}
.knowledge .annex-down h3 {
  font-size: 30px;
  font-family: PingFang SC;
  font-weight: 600;
  color: #FFFFFF;
  line-height: 45px;
  text-align: center;
  margin: auto;
  padding-top: 74px;
  padding-bottom: 112px;
}
.knowledge .annex-down ul {
  display: flex;
  align-items: center;
  justify-content: space-around;
}
.knowledge .annex-down ul li {
  position: relative;
}
.knowledge .annex-down ul li:after {
  content: ' ';
  width: 70px;
  height: 2px;
  border-bottom: 2px solid #fff;
  position: absolute;
  bottom: -8px;
  left: 50%;
  margin-left: -35px;
}
.knowledge .annex-down ul .icon {
  width: 40px;
  height: 40px;
  margin: auto;
  background-color: #473e3e;
  margin-bottom: 10px;
}
.knowledge .annex-down ul p {
  font-size: 21px;
  font-family: PingFangSC-Medium, PingFang SC;
  font-weight: 500;
  color: #FFFFFF;
  line-height: 30px;
  text-align: center;
  margin: auto;
}

.video-wrap {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 3;
  background-color: rgba(0,0,0, 0.6);
  display: flex;
  justify-content: center;
  align-items: center;
  display: none;
}