*, body, html, div, ul, li, a, p, span {
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: 'Microsoft YaHei';
  box-sizing: border-box;
}
body, html {
  width: 100%;
  height: 100%;
  position: relative;
}
img {
  display: block;
}
a {
  text-decoration: none;
}
.flex {
  display: flex;
}
.items-center {
  align-items: center;
}
.container {
  max-width: 1920px;
  width: 100%;
  margin: 0 auto;
  background-color: #F4F8FC;
}
.nav {
  height: 80px;
  background-color: rgba(234, 238, 254, 0.8);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 999;
}
.nav .content {
  max-width: 1440px;
  height: 100%;
  padding: 0 48px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.nav .logo {
  height: 58px;
  margin-right: 154px;
  cursor: pointer;
}
.nav .nav-list {
  display: flex;
  gap: 10px;
}
.nav .nav-list li {
  width: 135px;
  height: 36px;
  font-size: 16px;
  line-height: 36px;
  text-align: center;
  cursor: pointer;
}
.nav .nav-list li a {
  color: rgba(0, 0, 0, 0.8);
}
.nav .nav-list li:hover {
  background-color: rgba(106, 89, 255, 0.1);
  border-radius: 8px;
}
.nav .nav-list li:hover a {
  color: #6147FF;
}
.nav .nav-btn {
  flex-shrink: 0;
  width: 159px;
  height: 44px;
  background: linear-gradient(90deg, #6147FF 0%, #698CD4 100%);
  border-radius: 12px;
  font-size: 18px;
  line-height: 44px;
  text-align: center;
  color: #fff;
  cursor: pointer;
}
.nav .nav-btn:hover {
  background: linear-gradient(90deg, #6147FF 0%, #71D4A8 100%);
}

.banner-item-i {
  width: 100%;
  height: 1080px;
  background: url("./images/banner1/bg.png") no-repeat center center;
  background-size: cover;
  position: relative;
}
.banner-item-i .word-img {
  position: absolute;
  top: 222px;
  left: 280px;
}
.banner-item-i .word-img>img:nth-child(1),
.banner-item-i .word-img>img:nth-child(2),
.banner-item-i .word-img>img:nth-child(3),
.banner-item-i .word-img>img:nth-child(4) {
  margin-bottom: 55px;
}
.banner-item-i .word-img>img:nth-child(4) {
  margin-left: -37px;
}
.banner-item-i .btn {
  width: 163px;
  height: 40px;
  border-radius: 8px;
  background: url("./images/banner1/btn-bg.png") no-repeat center center;
  background-size: cover;
  cursor: pointer;
  position: relative;
  z-index: 1;
}
.banner-item-i .btn .word {
  width: 100%;
  height: 100%;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  z-index: 2;
}
.banner-item-i .btn .word span {
  font-size: 18px;
  color: #fff;
}
.banner-item-i .btn .word img {
  width: 24px;
  height: 24px;
}
.banner-item-i .btn:hover::after {
  content: "";
  width: 100%;
  height: 100%;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.3);
  position: absolute;
  top: 0;
  left: 0;
}

.banner-item-ii {
  width: 100%;
  height: 876px;
  background: url("./images/banner2.png") no-repeat center center;
  background-size: cover;
}

.banner-item-iii {
  width: 100%;
  height: 968px;
  background: url("./images/banner3.png") no-repeat center center;
  background-size: cover;
}

.banner-item-iv {
  width: 100%;
  height: 876px;
  background: url("./images/banner4.png") no-repeat center center;
  background-size: cover;
}

.banner-item-v {
  width: 100%;
  height: 1531px;
  padding: 120px 0 0;
  background: url("./images/banner5/bg.png") no-repeat center center;
  background-size: cover;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.banner-item-v .title {
  font-size: 48px;
  font-weight: bold;
  line-height: 61px;
  color: #000;
  margin-bottom: 40px;
}
.banner-item-v .sub-title {
  font-size: 20px;
  line-height: 25px;
  color: rgba(0, 0, 0, 0.6);
  margin-bottom: 40px;
}
.banner-item-v .content {
  padding: 0 30px;
  max-width: 1270px;
}
.banner-item-v .case-list {
  width: 100%;
  height: 72px;
  padding: 8px;
  margin-bottom: 29px;
  border-radius: 18px;
  background-color: #EBF0F5;
  display: flex;
  justify-content: space-between;
  gap: 10px;
}
.banner-item-v .case-list .case-list-title {
  flex: 1;
  height: 100%;
  border-radius: 12px;
  background: none;
  background-size: cover;
  font-size: 18px;
  color: rgba(0, 0, 0, 0.6);
  display: flex;
  justify-content: center;
  align-items: center;
  transition: background 0.3s ease-in-out;
  cursor: pointer;
}
.banner-item-v .case-list .case-list-title.active {
  background: url("./images/banner5/btn-bg.png") no-repeat center center;
  background-size: cover;
  color: #fff;
}
.banner-item-v .case-desc {
  width: 100%;
  height: 386px;
  border-radius: 16px;
  overflow: hidden;
}
.banner-item-v .case-desc .swiper {
  width: 100%;
  height: 386px;
  display: flex;
  transition: transform 0.3s ease-in-out;
}
.banner-item-v .case-desc .swiper img{
  width: 100%;
  height: 100%;
  flex-shrink: 0;
}
.banner-item-v .contact{
  width: 1140px;
  margin-top: 40px;
}

.banner-item-vi {
  width: 100%;
  height: 663px;
  padding: 63px 0 0;
  background: url("./images/banner6/bg.png") no-repeat center center;
  background-size: cover;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.banner-item-vi .title {
  font-size: 32px;
  font-weight: bold;
  line-height: 41px;
  color: rgba(0, 0, 0, 0.8);
  margin-bottom: 40px;
}
.banner-item-vi .sub-title {
  font-size: 18px;
  line-height: 25px;
  color: rgba(0, 0, 0, 0.6);
  margin-bottom: 40px;
}
.banner-item-vi .btn {
  width: 313px;
  height: 45px;
  background: url("./images/banner6/btn-bg.png") no-repeat center center;
  background-size: cover;
  cursor: pointer;
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}
.banner-item-vi .btn span {
  font-size: 20px;
  color: #fff;
  position: relative;
  z-index: 2;
}
.banner-item-vi .btn:hover::before {
  content: "";
  width: 100%;
  height: 100%;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.3);
  position: absolute;
  top: 0;
  left: 0;
}

.footer-container {
  width: 100%;
  background: #000;
}

.footer {
  max-width: 1920px;
  width: 100%;
  height: 360px;
  margin: 0 auto;
  padding-top: 46px;
  background: #000;
}
.footer .content {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 48px;
  display: flex;
  justify-content: space-between;
}

.footer .logo {
  width: 78px;
  height: 78px;
  cursor: pointer;
}
.footer .footer-list {
  display: flex;
  gap: 93px;
}
.footer .footer-list .footer-list-item li {
  margin-bottom: 29px;
}
.footer .footer-list .footer-list-item li a {
  font-size: 14px;
  line-height: 18px;
  color: #7B7B7B;
  margin-bottom: 29px;
}
.footer .footer-list .footer-list-item .title {
  font-weight: Bold;
  font-size: 18px;
  line-height: 23px;
  color: #fff;
  margin-bottom: 24px;
}

.wechat, .modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 9999;
  transition: all 0.3s ease-in-out;
}
.wechat .mask, .modal .mask {
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.25);
  position: absolute;
  top: 0;
  left: 0;
}

.wechat .wechat-content {
  width: 235px;
  height: 263px;
  padding: 8px;
  background-color: #fff;
  border-radius: 12px;
  box-shadow: 0px 8px 10px 0px rgba(0, 0, 0, 0.05);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: right;
}
.wechat .wechat-content .close {
  display: inline-block;
  width: 32px;
  height: 32px;
  background: url("./images/close.png") no-repeat center center;
  background-size: cover;
  cursor: pointer;
}
.wechat .wechat-content .close:hover {
  background: url("./images/close-hover.png") no-repeat center center;
}
.wechat .wechat-content>img {
  width: 150px;
  height: 150px;
  margin: 0 auto 12px;
}
.wechat .wechat-content .text {
  font-size: 16px;
  font-weight: bold;
  line-height: 25px;
  color: rgba(0, 0, 0, 0.8);
  text-align: center;
}

.modal .modal-content {
  width: 606px;
  height: 471px;
  padding: 48px;
  background-color: #fff;
  border-radius: 12px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.modal .modal-content img,
.modal .modal-content .info {
  margin-bottom: 16px;
}
.modal .modal-content .info-item:not(:last-child) {
  margin-bottom: 8px;
}
.modal .modal-content .info-item:last-child {
  margin-bottom: 32px;
}
.modal .modal-content .info-item .title {
  font-size: 14px;
  line-height: 38px;
  color: rgba(0, 0, 0, 0.6);
}
.modal .modal-content .info-item input {
  width: 100%;
  height: 40px;
  padding: 9px 12px;
  border: 1px solid #E6E6E6;
  border-radius: 8px;
  outline: none;
}
.modal .modal-content .info-item input:focus {
  border-color: #6147FF;
}
.modal .modal-content .btn {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}
.modal .modal-content .btn>div {
  width: 79px;
  height: 36px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
}
.modal .modal-content .btn .btn1 {
  background-color: #6147FF;
  color: #fff;
}
.modal .modal-content .btn .btn2 {
  border: 1px solid rgba(0, 0, 0, 0.2);
  color: rgba(0, 0, 0, 0.6);
}
/* 屏幕自适应 */
@media screen and (max-width: 1700px) {
  .banner-item-i .word-img {
    left: 172px;
  }
}

@media screen and (max-width: 1600px) {
  .banner-item-iii {
    height: 868px;
  }
  .banner-item-i .word-img {
    left: 122px;
  }
}

@media screen and (max-width: 1440px) {
  .banner-item-ii {
    height: 800px;
  }
  .banner-item-i .word-img {
    left: 60px;
  }

  .banner-item-iv {
    height: 776px;
  }
}

@media screen and (max-width: 1366px) {
  .nav .logo {
    margin-right: 50px;
  }

  .banner-item-i {
    height: 1000px;
  }
  .banner-item-i .word-img {
    top: 210px;
  }
  
  .banner-item-i .word-img>img:nth-child(1),
  .banner-item-i .word-img>img:nth-child(2),
  .banner-item-i .word-img>img:nth-child(3),
  .banner-item-i .word-img>img:nth-child(4) {
    /* margin-bottom: 40px;
    width: 90%; */
  }

  .banner-item-iii {
    height: 768px;
  }
  
  .banner-item-v .case-list {
    /* width: 90%; */
  }
  
  .banner-item-v .case-desc {
    /* width: 90%; */
  }
  
  .banner-item-v .case-desc .swiper {
    width: 100%;
  }
  
  .banner-item-v .case-desc .swiper img {
    width: 100%;
  }
  
  .banner-item-v .contact {
    width: 90%;
  }
  
  .footer {
    
  }
  
  .footer .footer-list {
    gap: 50px;
  }
}

@media screen and (max-width: 1300px) {
  .banner-item-i {
    height: 950px;
  }

  .banner-item-ii {
    height: 740px;
  }
  .banner-item-v .content {
    max-width: 96%;
  }
}


@media screen and (max-width: 1266px) {
  .banner-item-iv {
    height: 700px;
  }
}

/* 为更小的笔记本电脑屏幕优化 */
@media screen and (max-width: 1200px) {
  
  .banner-item-i {
    height: 880px;
  }
  .banner-item-i .word-img {
    top: 180px;
  }
  
  .banner-item-i .word-img>img:nth-child(1),
  .banner-item-i .word-img>img:nth-child(2),
  .banner-item-i .word-img>img:nth-child(3),
  .banner-item-i .word-img>img:nth-child(4) {
    /* margin-bottom: 30px;
    width: 85%; */
  }

  .banner-item-ii {
    height: 676px;
  }

  .banner-item-iii {
    height: 668px;
  }
  
  .banner-item-v .title {
    font-size: 36px;
  }
  
  .banner-item-v .sub-title {
    font-size: 18px;
  }
  
  .footer {
    
  }
  
  .footer .footer-list {
    gap: 60px;
  }
  
  .footer .footer-list .footer-list-item .title {
    font-size: 16px;
  }
  
  .footer .footer-list .footer-list-item li a {
    font-size: 12px;
  }
}

/* 为11英寸笔记本电脑优化 */
@media screen and (max-width: 1100px) {
  .nav {
    /* padding: 0 20px; */
    height: 60px;
  }
  
  .nav .logo {
    height: 60px;
    /* margin-right: 50px; */
  }
  
  .nav .nav-list {
    margin-right: 50px;
  }
  
  .nav .nav-list li {
    width: 80px;
    height: 30px;
    font-size: 12px;
    line-height: 30px;
  }
  
  .nav .nav-btn {
    width: 120px;
    height: 36px;
    font-size: 16px;
    line-height: 36px;
  }
  
  .banner-item-i {
    height: 820px;
  }
  
  .banner-item-i .word-img {
    top: 160px;
    left: 50px;
  }
  
  .banner-item-i .word-img>img:nth-child(1),
  .banner-item-i .word-img>img:nth-child(2),
  .banner-item-i .word-img>img:nth-child(3),
  .banner-item-i .word-img>img:nth-child(4) {
    margin-bottom: 20px;
    /* width: 80%; */
  }
  
  .banner-item-i .btn {
    width: 140px;
    height: 36px;
  }
  
  .banner-item-i .btn .word span {
    font-size: 16px;
  }
  
  .banner-item-ii,
  .banner-item-iii,
  .banner-item-iv {
    height: 600px;
  }
  
  .banner-item-v {
    height: auto;
    padding: 80px 0 40px;
  }
  
  .banner-item-v .title {
    font-size: 32px;
    margin-bottom: 20px;
  }
  
  .banner-item-v .sub-title {
    font-size: 16px;
    margin-bottom: 20px;
  }
  
  .banner-item-v .case-list {
    margin-bottom: 10px;
  }
  
  .banner-item-v .case-desc {
    height: 300px;
  }
  
  .banner-item-v .case-desc .swiper {
    height: 300px;
  }
  
  .banner-item-vi {
    height: 500px;
    padding: 40px 0 0;
  }
  
  .banner-item-vi .title {
    font-size: 28px;
    margin-bottom: 20px;
  }
  
  .banner-item-vi .sub-title {
    font-size: 16px;
    margin-bottom: 20px;
  }
  
  .banner-item-vi .btn {
    width: 280px;
    height: 40px;
  }
  
  .banner-item-vi .btn span {
    font-size: 18px;
  }
  
  .footer {
    height: auto;
  }
  
  .footer .logo {
    margin-bottom: 20px;
  }
  
  /* .footer .footer-list {
    gap: 20px;
  } */
  
  /* .modal .modal-content {
    width: 90%;
    padding: 30px;
  } */
}

@media screen and (max-width: 1024px) {
  .banner-item-i {
    height: 730px;
  }
  .banner-item-i .word-img {
    top: 150px;
  }
  .banner-item-i .word-img>img:nth-child(1),
  .banner-item-i .word-img>img:nth-child(2),
  .banner-item-i .word-img>img:nth-child(3),
  .banner-item-i .word-img>img:nth-child(4) {
    margin-bottom: 20px;
    width: 80%;
  }

  .banner-item-ii,
  .banner-item-iii,
  .banner-item-iv {
    height: 580px;
  }
}

@media screen and (max-width: 920px) {
  .banner-item-i {
    height: 670px;
  }
  .banner-item-i .word-img {
    top: 140px;
  }
  .banner-item-i .word-img>img:nth-child(1),
  .banner-item-i .word-img>img:nth-child(2),
  .banner-item-i .word-img>img:nth-child(3),
  .banner-item-i .word-img>img:nth-child(4) {
    margin-bottom: 20px;
    width: 70%;
  }

  .banner-item-ii,
  .banner-item-iv {
    height: 500px;
  }

  .banner-item-iii {
    height: 500px;
  }
}

@media screen and (max-width: 826px) {
  .nav .content {
    padding: 0 24px;
  }

  .footer .content {
    padding: 0 24px;
  }

  .banner-item-i {
    height: 620px;
  }
  .banner-item-i .word-img {
    top: 130px;
  }
}

@media screen and (max-width: 768px) {
  .nav .content {
    padding: 0 10px;
  }

  .footer .content {
    padding: 0 10px;
  }

  .banner-item-i {
    height: 570px;
  }
  .banner-item-i .word-img {
    top: 120px;
    left: 40px;
  }
  .banner-item-i .word-img>img:nth-child(1),
  .banner-item-i .word-img>img:nth-child(2),
  .banner-item-i .word-img>img:nth-child(3),
  .banner-item-i .word-img>img:nth-child(4) {
    margin-bottom: 20px;
    width: 60%;
  }

  .banner-item-ii,
  .banner-item-iv {
    height: 440px;
  }

  .banner-item-iii {
    height: 450px;
  }
}