* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.bgcolor {
  width: 100%;
  background: url("../images/banner-bj@2x.png") no-repeat;
  background-size: 100% 100%;
}

body {
  min-width: 1200px;
}

/* 头部 */
header {
  height: 33.4375rem;
  width: 75rem;
  margin: 0 auto;
}

nav {
  width: 100%;
}

.header-box {
  width: 75rem;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  margin-top: .625rem;
}

.logo img {
  height: 2.5rem;
}

.list>ul {
  height: 5rem;
  display: flex;
  justify-content: center;
  align-items: center;
}

.li {
  padding: 0 1.25rem;
  position: relative;
  height: 90%;
  line-height: 5rem;
}

.list>ul>li>a {
  font-size: 1.25rem;
  color: #fff;
  font-family: 'SourceHanSansCN-Regular';
  text-decoration: none;
}

.list>ul>li>a:hover {
  cursor: pointer;
}

#link-list .underline-active {
  font-size: 1.375rem;
  font-family: 'SourceHanSansCN-Regular';
  text-decoration: underline;
}

.header-content {
  width: 75rem;
  height: calc(100% - 5rem);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  letter-spacing: .625rem;
  font-family: 'SourceHanSansCN-Bold';
}

.more {
  background: #F8F8F9;
  box-shadow: 0 .125rem .5rem 0 rgba(191, 191, 191, 0.4);
  width: 15.625rem;
  height: 3.5rem;
  border-radius: .25rem;
  font-family: 'SourceHanSansCN-Regular';
  border: .0625rem solid #F8F8F9;
  color: #737373;
  cursor: pointer;
  font-size: 1.25rem;
  margin-top: 1.25rem;
}

.more a {
  text-decoration: none;
}

.header-content p {
  color: #fff;
  font-size: 4rem;

}

.header-content p:nth-child(1) {
  margin-top: 6.0625rem;
}

.header-content p:nth-child(2) {
  margin-top: 1.25rem;
}

.header-content button {
  margin-top: 6.125rem;
}

section {
  width: 100%;
}

/** 业务模式 */
/* .business-model {
  width: 75rem;
  margin: 1.875rem auto;
  display: flex;
  flex-direction: column;
} */

h1 {
  font-size: 2.25rem;
  color: #000;
  font-family: 'SourceHanSansCN-Bold';
  text-align: center;
  margin-bottom: 1.875rem;
}

.project {
  flex: 1;
  display: flex;
  flex-wrap: wrap;
  align-content: space-between;
  justify-content: space-between;
  font-family: 'SourceHanSansCN-Regular';
  font-weight: bold;
}

.project .project-item {
  width: 18rem;
  height: 14.5rem;
  border-radius: .375rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: box-shadow 0.3s;
  margin-bottom: 1.25rem;
}

.project-item:nth-child(-n + 4) {
  background-color: #fafbf9;
}

.project-item:nth-child(n + 5):nth-child(-n + 8) {
  background-color: #f7f8fd;
}

.project-item:nth-child(n + 9):nth-child(-n + 12) {
  background: #f8fdf7;
}


.project-item:last-child:nth-child(4n - 1) {
  margin-right: calc(24% + 4% / 3);
}

/* 如果最后一行是2个元素 */
.project-item:last-child:nth-child(4n - 2) {
  margin-right: calc(48% + 8% / 3);
}

.project-item:hover {
  box-shadow: 0 .25rem .625rem 0 rgba(0, 0, 0, 0.15);
}

.project-item img {
  width: 15.625rem;
  height: 9.375rem;
  border: .0625rem solid #b6b6b6;
  border-radius: .25rem;
  margin-top: .5rem;
}

.project-item figcaption {
  font-size: 1.125rem;
  padding-top: 1.25rem;
  text-align: center;
}

.project-item div {
  margin-top: 1.25rem;
}


.solution,
.products,
.business-model,
.advantage,
.concerning {
  width: 75rem;
  margin: auto;
  padding: 3.125rem 0 5rem;
  display: flex;
  flex-direction: column;
}

/** 解决方案 */
.solution {
  /* height: 33.75rem; */
}

.solution .solution-item {
  display: flex;
  flex: 1;
  justify-content: space-around;
  align-items: center;
}

.solution-item>div {
  width: 35%;
  height: 100%;
}

.solution-item>img {
  width: 34.375rem;
  height: 17.5rem;
}

.solution-content {
  display: flex;
  flex-direction: column;
  justify-content: space-evenly;
}

.solution-content>p {
  font-size: 1.125rem;
  color: #333;
  font-family: 'SourceHanSansCN-Regular';
}

/** 产品案例 */
.products {
  /* height: 55.625rem; */
  align-items: center;
}

.products .products-item {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex: 1;
}

.products-item+.products-item {
  margin-top: 6.25rem;
}

.products-item>div {
  width: 35%;
  height: 100%;
}

.products-item>img {
  width: 34.375rem;
  height: 17.5rem;
}
.products-app>img{
  width: 17.5rem;
}
.products-app>div {
  width: 850px;
  height: 100%;
  margin-right: 50px;
}
.products-content {
  display: flex;
  flex-direction: column;
  justify-content: space-evenly;
}

.products-content>p {
  font-size: 1.125rem;
  color: #333;
  font-family: 'SourceHanSansCN-Regular';
}

.products-title {
  font-size: 1.75rem;
  color: #000;
  font-weight: bold;
}

.advantage-list {
  display: flex;
  justify-content: space-between;
  flex: 1;
}


.advantage-item {
  width: 13.75rem;
  height: 23.75rem;
  background: #fff;
  border-radius: 3rem;
}

.advantage-item .item-header {
  height: 55%;
  background: #fff;
  box-shadow: -1.75rem 1.75rem 3.5rem 0 rgba(15, 15, 16, 0.1), 1.75rem -1.75rem 3.5rem 0 rgba(45, 45, 54, 0.1);
  border-radius: 3rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-family: 'SourceHanSansCN-Regular';
  font-weight: bold;
}

.advantage-item .item-header img {
  width: 4.5rem;
  height: 4.5rem;
}

.advantage-item .item-header span {
  margin-top: 1.25rem;
  font-size: 1.375rem;
}

.advantage-item .item-content {
  height: 50%;
  padding: 1.25rem .0625rem 0 .625rem;
  font-size: 1.25rem;
  color: #A0A0A6;
  font-family: 'SourceHanSansCN-Regular';
}

.concerning {
  /* height: 31.25rem;
  width: 75rem;
  margin: auto;
  padding: 1.875rem 0;
  display: flex;
  flex-direction: column; */
}

.concerning-list {
  display: flex;
  flex: 1;
  justify-content: space-around;
  align-items: center;
}

.concerning-box {
  width: 28.125rem;
  height: 18.75rem;
  background: linear-gradient(225deg, #EBEBEB 0%, #FFFFFF 100%);
  box-shadow: -1.75rem 1.75rem 3.5rem 0 rgba(213, 213, 213, 0.5), 1.75rem -1.75rem 3.5rem 0 rgba(255, 255, 255, 0.5);
  border-radius: 2.5rem;
}

.concerning-box img {
  width: 28.125rem;
  height: 18.75rem;
  border-radius: 2.5rem;
  margin-top: -1.875rem;
  margin-left: -2.5rem;
}

.h1 {
  margin-bottom: 5rem;
}

.concerning-content {
  width: 31.25rem;
  height: 15.625rem;
  font-size: 1.25rem;
  font-family: 'SourceHanSansCN-Regular';
  color: #A0A0A6;
}

/* 底部 */

.footer-bgcolor {
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  background: #F8F8F9;
  color: #595959;
}

.footer-box {
  /* flex: 1; */
  width: 100rem;
  margin: auto;
  padding: 1.875rem 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 20px;
}

.footer-box span {
  display: inline-block;
  margin-bottom: .625rem;
  font-size: 1.125rem;
  letter-spacing: .125rem;
  font-family: 'SourceHanSansCN-Regular';
  white-space: nowrap;
}

.footer-box span:nth-child(odd) {
  width: 30%;
}

.footer-filings {
  border-top: .0625rem solid #8C8C8C;
  height: 3.875rem;
  text-align: center;
  font-size: 1rem;
  line-height: 3.875rem;
}

.footer-filings a {
  color: #595959;
}

.active {
  border-bottom: 2px solid #fff;
  font-family: '"SourceHanSansCN-Regular"';
  color: #fff;
}