* {
  margin: 0;
  padding: 0;
}



body,
#app {
  height: 100%;
  background: #f4f5f6;
  color: #2b2e4a;
}
#header {
  height: 80px;
  width: 1280px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
#logo {
  height: 80px;
  width: 149px;
  height: 22px;
}
#nav {
  height: 80px;
  width: 720px;
  font-size: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
#nav a {
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}
#introduce {
  background: #ffffff;
  display: flex;
  justify-content: center;
  align-items: center;
  padding-top: 20px;
  height: 487px;
}
#introduce img {
  height: 487px;
  width: 450px;
  display: block;
}
.introduce-content {
  width: 600px;
  margin-right: 50px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}
.introduce-content h1 {
    font-size: inherit; /* 重置字体大小 */
    color: inherit; /* 继承父元素的文字颜色 */
    font-weight: 600;
}
.introduce-content div {
  font-weight: 600;
  font-size: 56px;
}
.introduce-content div span {
  color: #3742fa;
}
.introduce-content div:nth-child(3) {
  font-size: 16px;
  font-weight: 400;
  margin: 20px 0;
}
.introduce-content div.introduce-btn {
  width: 100%;
  margin-top: 20px;
  display: flex;
  justify-content: space-around;
  align-items: center;
}
.introduce-content div.introduce-btn > div {
  width: 185px;
  line-height: 52px;
  background: #3742fa;
  box-shadow:
    0px 8px 8px -4px rgba(24, 39, 75, 0.08),
    0px 4px 6px -4px rgba(24, 39, 75, 0.12);
  border-radius: 24px;
  font-weight: 400;
  font-size: 14px;
  color: #ffffff;
  text-align: center;
}
.introduce-content div.introduce-btn > div:nth-child(2) {
  background: #3742fa url("../static/index/phone.png") no-repeat 37px center;
}
#main {
  background: url("../static/index/watermark.png") no-repeat 220px 1000px;
  background-size: 800px 130px;
}
.main-title {
  padding-top: 90px;
  font-weight: 600;
  font-size: 56px;
  color: #2b2e4a;
  line-height: 72px;
  text-align: center;
}
.main-title span {
  color: #3742fa;
  display: inline-block;
  margin-left: 30px;
}
.main-desc {
  /* font-weight: 500; */
  font-size: 16px;
  color: #2b2e4a;
  line-height: 24px;
  text-align: center;
  padding-top: 16px;
  padding-bottom: 70px;
}
.main-core {
  margin: 0 auto;
  width: 1280px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-gap: 40px;
}
.main-core > div {
  width: 280px;
  height: 280px;
  box-sizing: border-box;
  background: #ffffff;
  border-radius: 26px;
  padding: 44px 24px;
  display: flex;
  flex-direction: column;
  /* justify-content: center;
  align-items: center; */
}
.main-core > div img {
  width: 40px;
  height: 40px;
}
.main-core > div div:nth-child(2) {
  font-weight: 600;
  font-size: 20px;
  color: #000000;
  margin: 16px 0;
}
.main-core > div div:nth-child(3) {
  font-size: 16px;
  color: #2b2e4a;
  line-height: 24px;
}

.main-retrospect > div {
  width: 1280px;
  background: #ffffff;
  border-radius: 26px;
  padding: 43px 52px;
  margin: 0 auto;
  display: flex;
  margin-bottom: 40px;
  box-sizing: border-box;
}
.main-retrospect .retrospect-content {
  flex: 1;
}
.main-retrospect .retrospect-content .retrospect-title {
  font-weight: 600;
  font-size: 56px;
  padding-bottom: 14px;
}

.main-retrospect .retrospect-content div.retrospect-desc1 {
  font-weight: 300;
  font-size: 16px;
  color: #2b2e4a;
  line-height: 24px;
}
.main-retrospect .retrospect-content div.retrospect-desc2 {
  font-weight: 400;
  font-size: 16px;
  line-height: 24px;
}
.main-retrospect .retrospect-btn {
  width: 164px;
  height: 52px;
  line-height: 52px;
  border-radius: 24px;
  border: 2px solid #3742fa;
  font-weight: 600;
  font-size: 14px;
  color: #3742fa;
  letter-spacing: 1px;
  text-align: center;
  box-sizing: border-box;
  margin-left: 200px;
  align-self: end;
}

/* .main-certification {
  width: 1280px;
  margin: 0 auto;
  background: #ffffff;
  border-radius: 26px;
  padding: 80px 52px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-sizing: border-box;
}
.certification-show {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-gap: 20px;
}
.certification-show > div {
  width: 186px;
  height: 92px;
  background: #f7f8f9;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.certification-show > div > div {
  font-weight: 300;
  font-size: 12px;
  color: #2b2e4a;
}
.certification-show > div > div:first-child {
  font-weight: 600;
  font-size: 18px;
  color: #3742fa;
  padding-bottom: 3px;
}
.certification-introduce {
  flex: 1;
  padding-left: 100px;
}
.certification-introduce > div:first-child {
  font-weight: 600;
  font-size: 56px;
  line-height: 64px;
}
.certification-introduce > div:nth-child(2) {
  font-weight: 600;
  font-size: 16px;
  margin: 14px 0 40px;
}
.certification-introduce > div:nth-child(3) {
  height: 52px;
  border-radius: 24px;
  border: 2px solid #3742fa;
  padding: 14px 70px;
  width: fit-content;
  box-sizing: border-box;
  color: #3742fa;
  letter-spacing: 1px;
  font-size: 14px;
  font-weight: 300;
} */

.main-case > div {
  width: 1280px;
  margin: 0 auto;
  background: #ffffff;
  border-radius: 18px;
  padding: 43px 80px;
  display: flex;
  margin-bottom: 23px;
  box-sizing: border-box;
}
.case-content {
  flex: 1;
  color: #000000;
}
.case-content .ml{
  margin-left: 30px;
}
.case-content .case-title {
  font-weight: 600;
  font-size: 18px;
  line-height: 20px;
  letter-spacing: 2px;
}
.case-content .case-time {
  font-weight: 300;
  font-size: 12px;
  letter-spacing: 1px;
  padding: 10px 0 14px;
}
.case-content .case-desc {
  font-weight: 500;
  font-size: 14px;
  line-height: 20px;
  letter-spacing: 1px;
}
.case-content > div:last-child {
  font-weight: 500;
  font-size: 14px;
  color: #3742fa;
  letter-spacing: 1px;
  padding-top: 14px;
}
.case-content > div:last-child span {
  background: #3742fa;
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  margin-right: 5px;
  margin-top: 2px;
}
.case-btn {
  padding: 4px 27px;
  line-height: 36px;
  height: 36px;
  background: #3742fa;
  box-shadow:
    0px 8px 8px -4px rgba(24, 39, 75, 0.08),
    0px 4px 6px -4px rgba(24, 39, 75, 0.12);
  border-radius: 24px;
  font-size: 14px;
  color: #ffffff;
  letter-spacing: 1px;
}
.main-consult {
  padding: 50px 80px 50px;
  margin-top: 40px;
  width: 1280px;
  margin: 0 auto;
  background: #ffffff;
  border-radius: 26px;
  box-sizing: border-box;
  display: flex;
  font-size: 16px;
}
.consult-content {
  flex: 1;
}
.consult-content > div:first-child {
  font-weight: 600;
  font-size: 56px;
  line-height: 64px;
}
.consult-content > div:nth-child(2) {
  font-weight: 600;
  padding: 20px 0 27px;
}
.consult-phone {
  font-weight: 400;
  line-height: 26px;
}
.consult-btn {
  width: 230px;
  height: 52px;
  line-height: 52px;
  border-radius: 26px;
  border: 2px solid #3742fa;
  text-align: center;
  color: #3742fa;
  box-sizing: border-box;
  align-self: end;
}

.footer{
  margin-top: 80px;
  background: #ffffff;
}
.footer > div:first-child{
  display: flex;
  justify-content: space-between;
  width: 1280px;
  margin: 0 auto;
  box-sizing: border-box;
  padding-top: 80px;
  padding-bottom: 40px;
  border-bottom: 1px solid #979797;
}
.footer > div:first-child img{
  width: 130px;
  height: 20px;
}
.footer > div:first-child>div{
  width: 360px;
}
.footer > div:first-child>div>div{
  font-weight: 300;
  font-size: 12px;
  line-height: 24px;
}
.footer > div:first-child>div>div:first-child{
  margin-bottom: 20px;
  font-weight: 600;
  font-size: 20px;
}
.footer > div:last-child{
  text-align: center;
  font-weight: bold;
  font-size: 12px;
  color: #6E6F81;
  padding: 20px 0;
}
.footer > div:first-child .footer-middle{
  width: 140px;
}
.footer-middle>div:not(:first-child){
  cursor: pointer;
}
.footer-middle>div:not(:first-child):hover{
  color: #1677ff;
}

.main-introduction{
  width: 1280px;
  margin: 0 auto;
  background: #ffffff;
  border-radius: 26px;
  padding: 60px 35px;
  font-weight: 300;
  font-size: 16px;
  color: #2B2E4A;
  box-sizing: border-box;
}
.main-introduction>div:first-child{
  font-weight: 600;
font-size: 40px;
color: #000000;
margin-bottom: 40px;
}

.main-centre {
  margin: 0 auto;
  width: 1280px;
  display: flex;
  gap: 40px;
}
.main-centre > div:first-child {
  width: 732px;
  height: 541px;
  background: #ffffff;
  border-radius: 26px;
  padding: 40px 26px;
  box-sizing: border-box;
  font-size: 20px;
}
.main-centre > div:first-child img {
  width: 35px;
  height: 35px;
}
.main-centre > div:first-child > div:nth-child(2) {
  font-weight: 600;
  font-size: 20px;
  color: #000000;
  padding: 30px 0 18px;
}
.main-centre > div:first-child > div:nth-child(3) {
  font-weight: 300;
  font-size: 16px;
  color: #2b2e4a;
}
.main-centre .centre-content {
  flex: 1;
  width: 500px;
  height: 541px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.centre-content > div {
  font-weight: 300;
  font-size: 14px;
  padding: 15px 32px;
  background: #ffffff;
  border-radius: 10px;
  display: flex;
  /* justify-content: center; */
  align-items: center;
}
.centre-content > div > img {
  width: 25px;
  height: 25px;
  margin-right: 20px;
}
.centre-content > div .centre-title {
  font-weight: 600;
  font-size: 16px;
}

.main-trouble{
  width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}
.main-trouble > div{
 background: #FFFFFF;
border-radius: 26px;
padding:60px 24px;
font-weight: 300;
font-size: 16px;
}
.main-trouble > div>div:first-child{
  font-weight: 600;
font-size: 40px;
color: #000000;
margin-bottom: 5px;
}











#nav a:hover{
  color: #3742fa;
}
/* 桌面端隐藏汉堡按钮 */
#nav-toggle{
  display: none;
}
.nav-toggle-btn{
  display: none;
}


/* 平板及移动端导航折叠菜单 (≤991px) */
@media (max-width: 991px){
  .nav-toggle-btn{
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 30px;
    height: 24px;
    cursor: pointer;
  }
  .nav-toggle-btn span{
    display: block;
    height: 3px;
    width: 100%;
    background: #2b2e4a;
    border-radius: 2px;
    transition: all 0.3s ease;
  }
  /* 展开时汉堡按钮变为关闭图标 */
  #nav-toggle:checked ~ .nav-toggle-btn span:nth-child(1){
    transform: translateY(8px) rotate(45deg);
  }
  #nav-toggle:checked ~ .nav-toggle-btn span:nth-child(2){
    opacity: 0;
  }
  #nav-toggle:checked ~ .nav-toggle-btn span:nth-child(3){
    transform: translateY(-8px) rotate(-45deg);
  }
  #header{
    position: relative;
    width: 100%;
    height: auto;
    padding: 16px 20px;
    box-sizing: border-box;
  }
  #logo{
    height: 22px;
  }
  #nav{
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    height: auto;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    font-size: 15px;
    background: #ffffff;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.12);
    padding: 0 20px;
    box-sizing: border-box;
    z-index: 100;
  }
  #nav > a{
    display: block;
    width: 100%;
    padding: 14px 4px;
    border-bottom: 1px solid #f0f0f0;
    transition: background 0.2s ease, color 0.2s ease, padding-left 0.2s ease;
  }
  #nav > a:hover{
    background: #f4f5f6;
    color: #3742fa;
    padding-left: 14px;
  }
  #nav > a:last-child{
    border-bottom: none;
  }
  /* 勾选时展开导航 */
  #nav-toggle:checked ~ #nav{
    display: flex;
  }
}

/* 平板端适配 (768px - 991px) */
@media only screen and (min-width: 768px) and (max-width:991px){
  #introduce {
    flex-direction: column;
    height: auto;
    padding: 48px 24px;
    gap: 36px;
    background: linear-gradient(180deg, #ffffff 0%, #f4f5f6 100%);
  }
  .introduce-content {
    width: 100%;
    margin-right: 0;
    align-items: center;
    text-align: center;
  }
  .introduce-content>div:first-child,.introduce-content>div:nth-child(2) {
    font-size: 40px;
    line-height: 56px;
  }
  .introduce-content>div:nth-child(3) {
    padding: 0 100px;
  }
  .introduce-content div.introduce-btn {
    justify-content: center;
    gap: 20px;
  }
  #introduce img {
    width: 100%;
    max-width: 420px;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 12px 32px rgba(55, 66, 250, 0.12);
  }
  .main-title {
    font-size: 40px;
    line-height: 56px;
    padding: 0 100px;
    box-sizing: border-box;
  }
  .main-desc {
    padding-bottom: 56px;
  }
  .main-core {
    width: 100%;
    grid-template-columns: repeat(2, 1fr);
    padding: 0 24px;
    box-sizing: border-box;
    grid-gap: 24px;
    margin-bottom: 40px;
  }
  .main-core > div {
    width: 100%;
    height: auto;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
  }
  .main-core > div:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(24, 39, 75, 0.1);
  }
  .main-retrospect {
    margin: 0 24px;
  }
  .main-retrospect > div {
    width: 100%;
    padding: 32px 28px;
    box-sizing: border-box;
    align-items: center;
    gap: 20px;
  }
  .main-retrospect .retrospect-btn {
    margin-left: 0;
    align-self: center;
    width: 180px;
  }
  .main-certification {
    margin: 0 24px;
    width: calc(100% - 48px);
    flex-direction: column;
    padding: 50px 28px;
    box-sizing: border-box;
    gap: 40px;
    margin-bottom: 30px;
  }
  .certification-introduce {
    padding-left: 0;
    text-align: center;
  }
  .certification-introduce > div:first-child {
    font-size: 40px;
    line-height: 52px;
  }
  .certification-introduce > div:last-child {
    margin:0 auto;
  }
  .main-case {
    margin: 0 24px;
  }
  .main-case > div {
    width: 100%;
    padding: 32px 28px;
    box-sizing: border-box;
    align-items: center;
    gap: 20px;
    transition: box-shadow 0.25s ease;
  }
  .main-case > div:hover {
    box-shadow: 0 12px 24px rgba(24, 39, 75, 0.08);
  }
  .main-consult {
    width: calc(100% - 48px);
  }
  .consult-content > div:first-child {
    font-size: 40px;
    line-height: 52px;
  }
  /* .consult-phone {
    color: rgba(255, 255, 255, 0.92);
  } */
  /* .consult-btn {
    align-self: center;
    background: #ffffff;
    color: #3742fa;
    border-color: #ffffff;
  } */
  .footer > div:first-child {
    width: 100%;
    padding: 48px 24px;
    box-sizing: border-box;
    flex-wrap: wrap;
    gap: 32px;
  }
  .footer > div:first-child>div{
    width: 45%;
  }
   .footer > div:first-child .footer-middle {
    width: 45%;
   }
  .main-retrospect .retrospect-content .retrospect-title {
    font-size: 40px;
  }
}

/* 移动端适配 (<768px) */
@media (max-width: 767px) {
  #introduce {
    flex-direction: column;
    height: auto;
    padding: 32px 16px;
    gap: 28px;
    background: linear-gradient(180deg, #ffffff 0%, #f4f5f6 100%);
  }
  .introduce-content {
    width: 100%;
    margin-right: 0;
    align-items: center;
    text-align: center;
  }
  .introduce-content div {
    font-size: 30px;
    /* line-height: 42px; */
  }
  .introduce-content div:nth-child(3){
    padding: 0 24px;
  }
  .introduce-content div.introduce-btn {
    justify-content: center;
    gap: 14px;
    margin-top: 24px;
  }
  .introduce-content div.introduce-btn > div {
    width: 44%;
    line-height: 48px;
    font-size: 14px;
    border-radius: 24px;
  }
  .introduce-content div.introduce-btn > div:nth-child(2) {
    background: #3742fa url(../static/index/phone.png) no-repeat 20% center;
  }
  #introduce img {
    width: 100%;
    max-width: 320px;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 12px 32px rgba(55, 66, 250, 0.12);
  }
  .main-title {
    font-size: 26px;
    padding: 0 16px;
    padding-top: 48px;
    line-height: 38px;
  }
  .main-title span {
    display: block;
    margin-left: 0;
    margin-top: 8px;
  }
  .main-desc {
    padding: 12px 24px 40px;
    font-size: 14px;
  }
  .main-core {
    width: 100%;
    grid-template-columns: 1fr;
    padding: 0 16px;
    box-sizing: border-box;
    grid-gap: 16px;
  }
  .main-core > div {
    width: 100%;
    height: auto;
    padding: 28px 22px;
    border-radius: 18px;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
  }
  .main-core > div:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(24, 39, 75, 0.1);
  }
  .main-retrospect {
    padding: 0 16px;
    box-sizing: border-box;
  }
  .main-retrospect > div {
    width: 100%;
    flex-direction: column;
    padding: 28px 20px;
    box-sizing: border-box;
    border-radius: 18px;
    gap: 18px;
    align-items: stretch;
  }
  .main-retrospect .retrospect-content .retrospect-title {
    font-size: 24px;
    line-height: 34px;
  }
  .main-retrospect .retrospect-btn {
    margin-left: 0;
    align-self: center;
    width: 50%;
  }
  .main-certification {
    width: calc(100% - 32px);
    margin: 0 auto;
    flex-direction: column;
    padding: 36px 20px;
    box-sizing: border-box;
    border-radius: 18px;
    gap: 32px;
  }
  .certification-show {
    grid-template-columns: repeat(2, 1fr);
    width: 100%;
  }
  .certification-show > div {
    width: 100%;
    height: auto;
    padding: 14px 6px;
    box-sizing: border-box;
  }
  .certification-introduce {
    padding-left: 0;
    text-align: center;
  }
  .certification-introduce > div:first-child {
    font-size: 26px;
    line-height: 38px;
  }
  .certification-introduce > div:nth-child(2) {
    margin: 12px 0 28px;
    font-size: 14px;
  }
   .certification-introduce > div:last-child{
    padding: 14px 40px;
    margin: 0 auto;
   }
  .main-case {
    padding: 0 16px;
    box-sizing: border-box;
  }
  .main-case > div {
    width: 100%;
    flex-direction: column;
    padding: 24px 20px;
    box-sizing: border-box;
    border-radius: 18px;
    gap: 14px;
    align-items: stretch;
  }
  .case-content .case-title {
    font-size: 16px;
  }
  .case-content .case-desc {
    font-size: 14px;
    line-height: 24px;
  }
  .case-btn {
    align-self: center;
    width: 50%;
    text-align: center;
    padding: 10px 27px;
    box-sizing: border-box;
    height: auto;
    line-height: normal;
  }
  .main-consult {
    width: calc(100% - 32px);
    margin: 30px auto;
    flex-direction: column;
    box-sizing: border-box;
    border-radius: 18px;
    gap: 22px;
    text-align: center;
    padding: 50px 44px 50px;
  }
  .consult-content > div:first-child {
    font-size: 26px;
    line-height: 38px;
  }
  .consult-content > div:nth-child(2) {
    font-size: 14px;
  }
  .consult-phone {
    /* color: rgba(255, 255, 255, 0.92);
    font-size: 14px; */
  }
  .consult-btn {
    margin: 0 auto;
    /* width: 100%;
    align-self: center;
    background: #ffffff;
    color: #3742fa;
    border-color: #ffffff; */
  }
  .footer {
    margin-top: 56px;
  }
  .footer > div:first-child {
    width: 100%;
    flex-direction: column;
    padding: 36px 20px;
    box-sizing: border-box;
    gap: 28px;
  }
  .footer > div:first-child > div {
    width: 100%;
  }
  .footer > div:first-child .footer-middle {
    width: 100%;
  }
  .footer > div:last-child {
    padding: 16px 20px;
    font-size: 11px;
    line-height: 18px;
  }
}