.content {
  width: 1500px;
  margin: 120px auto 0;
}
.content h3 {
  font-size: 24px;
  font-family: Microsoft YaHei;
  font-weight: 400;
  color: #1a1a1a;
  line-height: 40px;
  text-align: center;
}
.content .content-box {
  margin-top: 60px;
}
.content .product-box {
  display: flex;
  justify-content: space-between;
}
.content .product-box .product-item {
  text-align: center;
  position: relative;
  cursor: pointer;
}
.content .product-box .product-item .product-item-bg {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  background: rgba(0,0,0,0);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #ffffff;
  transition: all 0.5s ease-out;
}
.content .product-box .product-item .product-item-bg img {
  margin: 24px 0;
}
.content .product-box .product-item .product-item-bg p {
  width: 240px;
}
.content .product-box .product-item .hide {
  font-size: 13px;
  line-height: 33px;
  display: none;
}
.content .product-box .product-item:hover .product-item-bg {
  background: rgba(0,0,0,0.6);
}
.content .product-box .product-item:hover .hide {
  display: block;
}
.content .work-engine-box {
  display: flex;
  justify-content: space-between;
}
.content .work-engine-box .work-engine-item {
  flex: 1;
  height: 300px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.content .work-engine-box .work-engine-item p.work-engine-title {
  font-size: 21px;
  color: #1b1b1b;
  line-height: 40px;
  margin-top: 50px;
}
.content .work-engine-box .work-engine-item p.work-engine-content {
  font-size: 16px;
  color: #666666;
  line-height: 40px;
  margin-top: 28px;
}
.content .modeling-box {
  display: flex;
  flex-direction: column;
}
.content .modeling-box .modeling-item {
  display: flex;
  align-items: center;
  width: 100%;
  height: 520px;
  margin-bottom: 60px;
}
.content .modeling-box .modeling-item .img-box,
.content .modeling-box .modeling-item .bg {
  width: 1000px;
  height: 520px;
  cursor: pointer;
}
.content .modeling-box .modeling-item .img-box:hover .bg,
.content .modeling-box .modeling-item .bg:hover .bg {
  background: rgba(0,0,0,0.6);
}
.content .modeling-box .modeling-item .img-box:hover .bg img,
.content .modeling-box .modeling-item .bg:hover .bg img {
  display: block;
}
.content .modeling-box .modeling-item .img-box .bg,
.content .modeling-box .modeling-item .bg .bg {
  background: rgba(0,0,0,0);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.5s ease-out;
}
.content .modeling-box .modeling-item .img-box .bg img,
.content .modeling-box .modeling-item .bg .bg img {
  display: none;
}
.content .modeling-box .modeling-item .img-box01 {
  background: url(../images/case01.png) center center no-repeat;
}
.content .modeling-box .modeling-item .text-box {
  height: 360px;
  background: #ffffff;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: left;
  justify-content: center;
}
.content .modeling-box .modeling-item .text-box h3 {
  margin-bottom: 33px;
  font-size: 18px;
  color: #2c2c2c;
  line-height: 40px;
  text-align: left;
}
.content .modeling-box .modeling-item .text-box p {
  font-size: 14px;
  color: #686868;
  line-height: 40px;
}
.content .modeling-box .modeling-item .text-box:hover h3 {
  color: #efb031;
}
.content .modeling-box .modeling-item .text-box01 {
  padding: 0 0 0 78px;
  margin-left: -200px;
}
.content .modeling-box .modeling-item .text-box02 {
  padding: 0 78px 0 0;
  margin-left: 200px;
  z-index: 2;
}
.content .mechanism-box {
  display: flex;
}
.content .mechanism-box .mechanism-item {
  display: flex;
  flex: 1;
  flex-direction: column;
}
.content .mechanism-box .mechanism-item .img-box,
.content .mechanism-box .mechanism-item .bg {
  width: 750px;
  height: 450px;
  cursor: pointer;
}
.content .mechanism-box .mechanism-item .img-box:hover .bg,
.content .mechanism-box .mechanism-item .bg:hover .bg {
  background: rgba(0,0,0,0.6);
}
.content .mechanism-box .mechanism-item .img-box:hover .bg img,
.content .mechanism-box .mechanism-item .bg:hover .bg img {
  display: block;
}
.content .mechanism-box .mechanism-item .img-box .bg,
.content .mechanism-box .mechanism-item .bg .bg {
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.5s ease-out;
}
.content .mechanism-box .mechanism-item .img-box .bg img,
.content .mechanism-box .mechanism-item .bg .bg img {
  display: none;
}
.content .mechanism-box .mechanism-item .img-box01 {
  background: url(../images/mechanism01.png) center center no-repeat;
}
.content .mechanism-box .mechanism-item .img-box02 {
  background: url(../images/mechanism02.png) center center no-repeat;
}
.content .mechanism-box .mechanism-item .text-box {
  background: #ffffff;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  text-align: left;
  margin-top: 40px;
}
.content .mechanism-box .mechanism-item .text-box h3 {
  margin-bottom: 33px;
  font-size: 18px;
  color: #2c2c2c;
  line-height: 40px;
}
.content .mechanism-box .mechanism-item .text-box p {
  font-size: 14px;
  color: #686868;
  line-height: 40px;
}
.content .mechanism-box .mechanism-item .text-box:hover h3 {
  color: #efb031;
}
.content .mechanism-box .mechanism-item .text-box01 {
  text-align: left;
}
.content .mechanism-box .mechanism-item .text-box01 h3 {
  text-align: left;
}
.content .mechanism-box .mechanism-item .text-box02 {
  text-align: right;
}
.content .mechanism-box .mechanism-item .text-box02 h3 {
  text-align: right;
}
.content .demand-box {
  display: flex;
  flex-direction: column;
}
.content .demand-box .demand-item {
  display: flex;
  width: 100%;
  height: 520px;
  margin-bottom: 60px;
  align-items: center;
  justify-content: center;
}
.content .demand-box .demand-item .img-box,
.content .demand-box .demand-item .bg {
  position: relative;
  width: 850px;
  height: 520px;
  cursor: pointer;
  z-index: 1;
}
.content .demand-box .demand-item .img-box:hover,
.content .demand-box .demand-item .bg:hover {
  z-index: 2;
}
.content .demand-box .demand-item .img-box:hover .bg,
.content .demand-box .demand-item .bg:hover .bg {
  background: rgba(0,0,0,0.6);
}
.content .demand-box .demand-item .img-box:hover .bg img,
.content .demand-box .demand-item .bg:hover .bg img {
  display: block;
}
.content .demand-box .demand-item .img-box .bg,
.content .demand-box .demand-item .bg .bg {
  background: rgba(0,0,0,0);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.5s ease-out;
}
.content .demand-box .demand-item .img-box .bg img,
.content .demand-box .demand-item .bg .bg img {
  display: none;
}
.content .demand-box .demand-item .img-box01 {
  background: url(../images/morefun01.png) center center no-repeat;
}
.content .demand-box .demand-item .img-box02 {
  background: url(../images/morefun02.png) center center no-repeat;
}
.content .demand-box .demand-item .text-box {
  background: #ffffff;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: center;
  flex: 1;
}
.content .demand-box .demand-item .text-box h3 {
  text-align: left;
  margin-bottom: 23px;
  font-size: 18px;
  color: #2c2c2c;
  line-height: 40px;
}
.content .demand-box .demand-item .text-box p {
  font-size: 12px;
  color: #686868;
  line-height: 40px;
}
.content .demand-box .demand-item .text-box:hover h3 {
  color: #efb031;
}
.content .demand-box .demand-item .text-box01 {
  margin-left: 50px;
}
.content .demand-box .demand-item .text-box01 h3 {
  text-align: left;
  margin-top: -50px;
}
.content .demand-box .demand-item .text-box02 {
  padding-right: 50px;
  text-align: right;
  z-index: 2;
}
.content .demand-box .demand-item .text-box02 h3 {
  padding-top: 0px;
  text-align: right;
}
.content .info-box {
  display: flex;
  flex-direction: column;
}
.content .info-box .info-item {
  display: flex;
  align-items: center;
  width: 100%;
  height: 460px;
}
.content .info-box .info-item .border-line {
  width: 650px;
  height: 360px;
  border: 1px solid #ffffff;
}
.content .info-box .info-item .img-box,
.content .info-box .info-item .bg {
  width: 750px;
  height: 460px;
  cursor: pointer;
}
.content .info-box .info-item .img-box:hover .bg,
.content .info-box .info-item .bg:hover .bg {
  background: rgba(0,0,0,0.6);
}
.content .info-box .info-item .img-box:hover .bg div,
.content .info-box .info-item .bg:hover .bg div {
  display: block;
}
.content .info-box .info-item .img-box .bg,
.content .info-box .info-item .bg .bg {
  background: rgba(0,0,0,0);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.5s ease-out;
}
.content .info-box .info-item .img-box .bg div,
.content .info-box .info-item .bg .bg div {
  display: none;
}
.content .info-box .info-item .img-box01 {
  background: url(../images/info01.png) center center no-repeat;
}
.content .info-box .info-item .img-box02 {
  background: url(../images/info02.png) center center no-repeat;
}
.content .info-box .info-item .img-box03 {
  background: url(../images/info03.png) center center no-repeat;
}
.content .info-box .info-item .text-box {
  height: 360px;
  background: #ffffff;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: left;
  justify-content: center;
}
.content .info-box .info-item .text-box h3 {
  margin-bottom: 33px;
  font-size: 18px;
  color: #2c2c2c;
  line-height: 40px;
  text-align: left;
}
.content .info-box .info-item .text-box p {
  font-size: 14px;
  color: #686868;
  line-height: 40px;
}
.content .info-box .info-item .text-box:hover h3 {
  color: #efb031;
}
.content .info-box .info-item .text-box01 {
  padding: 0 0 0 78px;
}
.content .info-box .info-item .text-box02 {
  padding: 0 78px 0 0;
  text-align: right;
}
.content .info-box .info-item .text-box02 h3 {
  text-align: right;
}