@font-face {
  font-family: "D-DIN-Bold";
  src: url("../font/D-DIN-Bold.otf");
}
@font-face {
  font-family: "D-DIN";
  src: url("../font/D-DIN.otf");
}

/* 基础样式重置与通用设置 */
* {
  margin: 0;
  padding: 0;
  font-family: '思源雅黑';
}




body, html {
  overflow-x: hidden;
}

.mobile-only {
  display: none;
}

.monban{
  position: absolute;
  width: 300vh;
  top: 20%;
  left: 45%;
  transform: translate(-50%, -50%);
  z-index: -10000;
}
.monban-img{
  width: 100%;
}

.monban img {
  transform: scale(0.9); /* 缩放到70% */
}

.business-title-hover{
  display: none;
}


.subway{
  position: absolute;
  top: 38.9%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: -10000;
}


/* 通用工具类 */
.inline-block { display: inline-block; }
.nowrap { white-space: nowrap; }
.flex { display: flex; flex-wrap: wrap; justify-content: center; }
.grid { display: grid; }
.relative { position: relative; }
.flex-fill { flex: 1; }

/* 字体与文本样式 */
.font-b, .font-size-l1, .font-size-l2 {
  font-family: '思源黑体';
}

.font-l {
  font-weight: 300;
}

/* 导航栏样式 */
.menu {
  position: fixed;
  width: 100vw;
}

#index-top {
  height: 70px;
  z-index: 9999;
}
#business-top {
  height: 70px;
  z-index: 9999;
}

.logo {
  position: absolute;
  height: 100%;
}

.logo img {
  position: relative;
  height: 2.5rem;
  transform: translateY(-50%);
  top: 50%;
  left: 1rem;
}

.nav-text {
  width: fit-content;
  margin: auto;
  float: right;
  height: 100%;
}

.nav-titles {
  padding: 0;
  margin: 0;
  height: 100%;
}

.nav-title {
  display: inline-block;
  text-align: center;
  align-content: space-evenly;
  vertical-align: top;
}

.nav-title span {
  color: #f2f2f2;
  text-align: center;
  margin: auto 16px;
  text-decoration: none;
  align-items: flex-end;
  border-bottom: 3px solid rgba(0, 0, 0, 0);
}

.nav-title:hover {
  cursor: pointer;
  transition-duration: 1s;
}

.nav-link-check {
  color: #296AEF !important;
  border-bottom: 3px solid #296AEF !important;
}

.nav-link:hover {
  color: #296AEF;
  border-bottom: 3px solid #296AEF;
}

.nav-link:hover ~ .nav-substitle,
.nav-substitle:hover {
  display: block;
}

.checkbtn {
  color: white;
  float: right;
  line-height: 70px;
  margin-right: 40px;
  cursor: pointer;
  display: none;
  text-align: center;
}

.fa-2x{
  margin-top: 27px;
  font-size: 15px;
}



#check { display: none; }


#top.menu {
  transform: translateY(-100%);
  transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* 导航栏显示状态 */
#top.menu.show {
  transform: translateY(0);
}

#top {
  height: 70px;
  z-index: 9999;
}

/* 定位工具类 */
.center-vertical {
  position: relative;
  top: 50%;
  transform: translateY(-50%);
  text-align: left;
}

.center-horizontal {
  position: relative;
  left: 50%;
  transform: translateX(-50%);
}

/* 顶部导航 */
.topnav {
  overflow: hidden;
  display: flex;
  justify-content: flex-end;
  max-width: 1200px;
  margin: 0 auto;
}

.topnav a {
  float: left;
  color: #f2f2f2;
  text-align: center;
  margin: auto 16px;
  text-decoration: none;
  display: flex;
  align-items: flex-end;
  border-bottom: 3px solid rgba(0, 0, 0, 0);
}

.topnav a:hover,
.topnav a.active {
  color: #296AEF;
  border-bottom: 3px solid #296AEF;
}

.topnav .icon { display: none; }

/* 主容器 */
._main {
  max-width: 1200px;
  margin: 0 auto;
}

/* 背景与标语 */
.background {
  position: relative;
  width: 100%;
  z-index: -999;
}

.slogan {
  position: absolute;
  text-align: center;
  margin: auto;
  color: white;
  z-index: 9999999;
  top: 30%;
  transform: translate(-50%, -50%);
  left: 50%;
  width: 100%;
  opacity: 0;
  transition: opacity 2s ease-in-out;
}

.slogan.fade-in {
  opacity: 1;
}

.title-nav{
  display: block;margin-top: 10px; font-size: 28px;
  font-weight: 400;
  letter-spacing: 28px;
  line-height: 40.54px;
  color: rgba(255, 255, 255, 1);
  text-align: center;
}

.slogan h2 { line-height: 43px; }

.mouse{
  position: absolute;
  text-align: center;
  margin: auto;
  color: white;
  z-index: 999999;
  top: 110%;
  transform: translate(-50%, -50%);
  left: 50%;
  width: 40vh;
  height: 40vh;
  animation: mouseFloat 2s ease-in-out infinite;
  transition: all 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
  cursor: pointer;
  opacity: 0;
}

.mouse.show {
  top: 95%;
  opacity: 1;
}

.mouse:hover {
  outline: 2px solid white;
  outline-offset: 2px;
  border-radius: 50%;
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.8);
  background: rgba(255, 255, 255, 0.1);
  
}

.mouse img {
  width: 100%;
  height: auto;
  opacity: 0.8;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.mouse:hover img {
  opacity: 1;
}

@keyframes mouseFloat {
  0%, 100% {
    transform: translate(-50%, -50%) translateY(0);
  }
  50% {
    transform: translate(-50%, -50%) translateY(-10px);
  }
}




.background > video {

  width: 100%;
  object-fit: cover;
  
}

.background::before {
  content: " ";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
/* 首屏加载动画样式 */
.loader-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: #ffffff;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  /* 确保初始就显示 */
  visibility: visible;
  opacity: 1;
  transition: opacity 1s ease-out, visibility 1s; /* 更长的容器淡出时间 */
}

/* 转动边框线动画 */
.loader-content {
  position: relative;
}

.loader-content::before {
  content: "";
  position: absolute;
  top: -10px;
  left: -10px;
  right: -10px;
  bottom: -10px;
}

.loader-content-border::before {

  position: absolute;
  margin: -10px;
  border: 6px solid #296aef;
  transition: all .5s;
  animation: clippath 3s infinite linear;
  pointer-events: none;
}

@keyframes clippath {
  0%, 100% { clip-path: inset(0 0 99% 0); }
  25% { clip-path: inset(0 99% 0 0); }
  50% { clip-path: inset(99% 0 0 0); }
  75% { clip-path: inset(0 0 0 99%); }
}

/* 转动边框线动画 */
.loader-content {
  position: relative;
}

.loader-content::before {
  content: "";
  position: absolute;
  top: -10px;
  left: -10px;
  right: -10px;
  bottom: -10px;
  transition: all .5s;
  pointer-events: none;
}


@keyframes clippath {
  0%, 100% { clip-path: inset(0 0 99% 0); }
  25% { clip-path: inset(0 99% 0 0); }
  50% { clip-path: inset(99% 0 0 0); }
  75% { clip-path: inset(0 0 0 99%); }
}

.loader-content {
  display: flex;
  gap: 20px;
  align-items: center;
  height: 80px;
  position: relative;
}

/* 转动边框线动画 */
.loader-content::before {
  content: "";
  position: absolute;
  top: -10px;
  left: -10px;
  right: -10px;
  bottom: -10px;
  transition: all .5s;
  animation: clippath 5s infinite linear;
  pointer-events: none;
}

@keyframes clippath {
  0%, 100% { clip-path: inset(0 0 99% 0); }
  25% { clip-path: inset(0 99% 0 0); }
  50% { clip-path: inset(99% 0 0 0); }
  75% { clip-path: inset(0 0 0 99%); }
}

/* 初始状态：完全显示 */
.loader-item {
  opacity: 1;
  width: 80px;
  height: 80px;
  transform: translateY(0) scale(1);
  display: inline-block;
}

.loader-item:nth-child(3) { 
  width: 160px;
}

.loader-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 第二张图片圆形抹除准备 */
.loader-item:nth-child(2) img {
  clip-path: circle(100% at 50% 50%);
  transition: clip-path 2s cubic-bezier(0.3, 0, 0.2, 1), opacity 2s ease;
}

/* 消失动画类 */
.loader-item.exit-up {
  animation: fadeOutUp 2s forwards cubic-bezier(0.3, 0, 0.2, 1); /* 更长的动画时长 */
}

.loader-item.exit-circle img {
  clip-path: circle(0% at 50% 50%);
  opacity: 0;
}

.loader-item.exit-down {
  animation: fadeOutDown 2s forwards cubic-bezier(0.3, 0, 0.2, 1); /* 更长的动画时长 */
}

/* 向上消失动画 - 更长时长 */
@keyframes fadeOutUp {
  from {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateY(-60px) scale(0.8);
  }
}

/* 向下消失动画 - 更长时长 */
@keyframes fadeOutDown {
  from {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateY(60px) scale(0.8);
  }
}


/* 业务范围核心样式 */
.business-container {
  position: relative;
  width: 100%;
  height: 450px;
  margin-top: 2rem;
  overflow: hidden;
}

.business-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.business-background::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 50%;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.6), transparent);
  z-index: 2;
  pointer-events: none;
}

.business-bg-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.6s ease-in-out;

}

.business-bg-image.active { opacity: 1; }

.business-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(0deg, rgba(0, 0, 0, 0.4) 0%, rgba(0, 0, 0, 0.1) 50%, rgba(0, 0, 0, 0.3) 100%);
  z-index: 2;
}

.business-grid-hover {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: row;
  z-index: 3;
  transition: all 0.5s ease;
}

.business-item {
  position: relative;
  cursor: pointer;
  transition: all 0.5s ease;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  background: transparent;
  flex: 1;
  min-height: 100%;
  text-decoration: none;
  color: inherit;
  flex-basis: 25%;
}

.business-item span {
  transition: all 0.6s ease;
  transform: scale(1);
}



.business-item:hover,
.business-item:active {
  background: transparent;
  transform: scale(1.01);
  z-index: 10;
}

/* 业务内容动画 */
.business-content-inner {
  text-align: center;
  color: white;
  padding: 2rem;
  transition: all 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
  transform: translateY(20px);
  position: relative;
}



.business-title {
  font-weight: 600;
  color: #fff;
  margin-bottom: 0.5rem;
  display: block;
  line-height: 1.4;
  height: 1.4em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  opacity: 1;
  transition: all 0.6s ease;
}

.business-content {
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.5;
  display: block;
  height: 0;
  overflow: hidden;
  opacity: 0;
  transition: all 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
  transform: translateY(10px);
}

/* 悬停与选中状态 */
.business-item:hover .business-content-inner,
.business-item.active-line .business-content-inner {
  transform: translateY(0px);
}

.business-item:hover .business-content,
.business-item.active-line .business-content {
  height: 3em;
  opacity: 1;
  transform: translateY(0);
  margin-top: 0.8rem;
}

/* 其他页面元素 */
.background-content {
  position: absolute;
  width: 100%;
  height: 100%;
  margin-top: -1rem;
  z-index: -1;
  object-fit: cover;
}

.background-content-scroll {
  position: fixed;
  top: 0;
  margin-top: 0;
}

/* 关于我们区域 */
.about { position: relative; }

.about-title {
  display: inline;
  font-weight: 700;
  letter-spacing: 0px;
  color: #fff;
  font-family: 'SourceHanSansCN-Regular';
  text-align: left;
  vertical-align: top;
  padding: 8px 0
}

.border-top { border-top: 6px solid #fff !important; }

.about-content {
  text-indent: 2em;
  letter-spacing: 0px;
  line-height: 50px;
  color: #fff;
  text-align: left;
  vertical-align: top;
}

.about-desc { flex: 1 1 auto; }
.about-desc:last-child { flex: none; }

.about-title {
  height: 105px;
  line-height: 105px;
}

.about-desc-title {
  color: #fff;
  vertical-align: top;
}

.about-desc-line { border-bottom: solid 1px #fff; }

.about-desc-content {
  opacity: 1;
  color: white;
  font-family: D-DIN;
  letter-spacing: 0px;
  white-space: nowrap;
}

.about-desc-unit {
  color: #fff;
  text-align: left;
  vertical-align: text-before-edge;
}

/* 发展区域 */
.develop {
  text-align: center;
  color: white;
}

.develop > div { width: 100%; }

.develop-title { letter-spacing: 0px; }

.develop-content {
  line-height: 44px;
  vertical-align: top;
}

/* 装饰元素 */
.plinth {
  display: inline-block;
  width: 82%;
  position: relative;
  height: 93px;
}

.plinth > img { position: absolute; }
.plinth > img:first-child { left: 0; }
.plinth > img:last-child { right: 0; }

/* 证书区域 */
.certificate-list { display: grid; }

.certificate {
  text-align: center;
  min-height: 24.5rem;
  position: relative;
}


/* .certificate:hover .certificate-plinth {
  transform: translate(-50%, -50%) scale(1.1);
  transition: transform 0.6s ease-in-out;
} */

.certificate:hover .certificate-img {
  transform: translateX(-50%) scale(1.2);
  transition: transform 0.6s ease-in-out;
}

.certificate-desc {
  flex: 1 1 auto;
  width: 100%;
}

.certificate-desc > div {
  width: 18rem;
  justify-self: center;
  margin: 0 auto;
}

.certificate-desc:nth-child(even) .certificate {
  margin-top: 6.5rem;
}
.certificate-plinth{
  position: absolute;
  top: 41%;
  left: 52%;
  transform: translate(-50%, -50%);
  width: 140%;
  
}



/* 每张奖状底座的独立定位 */
.certificate-plinth-1 {
  top: 38.5%;
  left: 52.5%;
  width: 141%;
}

.certificate-plinth-2 {
  top: 39%;
  left: 52.5%;
  width: 139.5%;
}

.certificate-plinth-3 {
  top: 38%;
  left: 52.5%;
  width: 140%;
}

.certificate-plinth-4 {
  top: 38.5%;
  left: 52.5%;
  width: 140%;
}

.certificate-title {
  width: 70%;
  line-height: 29px;
  margin: auto 0;
  display: inline-block;
  word-break: break-all;
  white-space: normal;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 10;
}


.certificate-img {
  width: 210px;
  height: auto;
  object-fit: contain;
  position: absolute;
  bottom: 44%;
  left: 50%;
  transform: translateX(-50%);
  box-shadow: 0px 5px 5px -2px #888888;
  transition: transform 0.3s ease-in-out;
}


/* 横向滚动容器 */
.over-x {
  overflow-x: scroll;
  overflow-y: hidden;
}

.over-x::-webkit-scrollbar { display: none; }

/* 合作伙伴 */
.partner-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  justify-content: center;
  margin-top: 1.5rem;
}

.partner-logo {
  text-align: center;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 10px;
  width: 135px;
  height: 55px;
  opacity: 1;
  border-radius: 12px;
  background: rgba(255, 255, 255, 1);
  box-shadow: 0px 6px 8px rgba(41, 106, 239, 0.18);
  transition: transform 0.3s ease;
}

.partner-logo:hover {
  transform: scale(1.25);
}

.partner-logo img {
  max-width: 100%;
  max-height: 100%;
  max-height: 60px;
  max-width: 220px;
}

.partner-logos-back {
  width: 100%;
  height: 225px;
  transform-origin: 50% 100% 0;
  transform: perspective(225px) rotateX(6deg);
  background: linear-gradient(0deg, rgba(5, 28, 59, 1) 0%, rgba(5, 28, 59, 0) 100%);
  position: relative;
  top: -140px;
  /* border-radius: 0 0 10.11px 10.11px; */
  z-index: -1;
  border-radius: 8.04px;
  box-sizing: border-box;
}

.partner-logos-back::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 8.04px;
  padding: 2px;
  background: linear-gradient(0deg, rgba(39, 199, 243, 1) 0%, rgba(39, 199, 243, 0) 100%);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: xor;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
}

/* 本地发展 */
.develop-local {
  flex-wrap: wrap;
  justify-content: center;
}

.icon-local {
  width: 30px;
  height: 30px;
  margin: auto 0;
}

.local {
  display: flex;
  text-align: start;
  width: 20rem;
  flex: 1 1 auto;
}

.local > div {
  margin-left: 1.5rem;
  color: #fff;
}

.local-city { text-align: left; vertical-align: top; }
.local-addr { vertical-align: top; margin: auto 0; }
.local-phone { font-family: D-DIN; }

/* 业务与荣誉区域 */
#business, #honor { padding-top: 5rem; }
#honor { margin-top: 5rem; }

/* 业务类型详情 */
.business-type-title {
  letter-spacing: 0px;
  color: rgba(51, 51, 51, 1);
  margin: 0;
}

.business-type-desc {
  font-weight: 400;
  letter-spacing: 0px;
  line-height: 44px;
  color: rgba(51, 51, 51, 1);
}

/* 介绍区域 */
.introduce {
  width: 1520px;
  background: rgba(255, 255, 255, 1);
  box-shadow: 0px 6px 12px rgba(0, 0, 0, 0.16);
  margin: 20px 0;
}

.introduce > div {
  width: 100%;
  margin: 28px;
}

.introduce-l {
  max-width: 69%;
  overflow-x: hidden;
  display: inline-flex;
}

.introduce-l > img {
  max-height: 700px;
  max-width: 100%;
  margin-right: 14px;
  object-fit: contain;
}

.introduce-r {
  width: 29%;
  height: 100%;
  float: inline-end;
  position: relative;
}

.introduce-r-b {
  height: 12.5rem;
  margin-bottom: 0;
  bottom: 0;
  position: absolute;
  width: 100%;
  display: flex;
  flex-flow: column;
}

.font-34-700 {
  font-weight: 700;
  letter-spacing: 0px;
  line-height: 50px;
}

.introduce-effect { color: rgba(41, 106, 239, 1); }

.introduce-desc, .introduce-con {
  font-weight: 400;
  letter-spacing: 0px;
  line-height: 40px;
  color: rgba(102, 102, 102, 1);
}

.introduce-d {
  width: 8rem;
  text-align: center;
}

.introduce-btn {
  text-align: center;
  padding: 7px 0;
  color: white;
  width: 100%;
  background-color: rgba(41, 106, 239, 1);
}

.introduce-con {
  overflow-wrap: break-word;
  word-break: break-word;
  white-space: normal;
  margin-top: 28px;
}

/* 业务详情卡片 */
.bus-d {
  background: white;
  box-shadow: 0px 6px 10px rgba(0, 0, 0, 0.25);
}

/* 页脚 */
.footer {
  display: flex;
  height: 80px;
  opacity: 1;
  background: rgba(3, 0, 20, 1);
  position: relative;
  color: #fff;
  font-size: small;
}

.footer > div {
  letter-spacing: 0px;
  line-height: 26px;
  margin: auto;
  text-align: center;
  max-width: 85%;
  display: flex;
  flex-wrap: wrap;
}

.footer span { margin: auto; }
.footer a { text-decoration: none; color: #fff; }

/* 视频类型选择 */
.video-type {
  display: inline-block;
  align-content: space-evenly;
  margin-right: 2.5rem;
  color: rgba(153, 153, 153, 1);
  line-height: 44px;
  border-radius: 8px;
  background: rgba(230, 230, 230, 1);
  padding: 0 15px;
}

.video-type.check {
  color: rgba(41, 106, 239, 1) !important;
  background: rgba(217, 230, 255, 1);
}

.video-type:hover { cursor: pointer; }

.about-top { display: grid; }
.content { position: relative; }

/* 响应式 - 大屏幕 */
@media screen and (min-width: 1201px) {
  .certificate-list {
    grid-template-columns: repeat(4, 25%);
    margin-top: 6rem;
  }

  .partner-logo:nth-child(n+37) {
    -webkit-box-reflect: below 0 linear-gradient(transparent 65%, white 200%);
  }

  .contact-section {
    background-position: 10% 1% !important;
    background-size: contain !important;
  }
  
  .develop.contact-section[style*="erth.png"] {
    background-size: 10% auto !important;
    background-position: center 5% !important;
    padding: 8rem 0 4rem 0 !important;
  }
  
}

/* 响应式 - 中屏幕 */
@media screen and (min-width: 601px) and (max-width: 1200px) {
  .certificate-list {
    grid-template-columns: repeat(4, 25%);
    margin-top: 6rem;
    min-width: 1200px;
  }
  
  .contact-section {
    background-position: center 22% !important;
    background-size: contain !important;
  }
  
  .develop.contact-section[style*="erth.png"] {
    background-size: 85% auto !important;
    background-position: center 8% !important;
    padding: 7rem 0 3.5rem 0 !important;
  }
}


/* 响应式 - 大屏幕通用样式 */
@media screen and (min-width: 601px) {


  .background { height: 100%; }
  
  .font-size-title { font-size: 70px; }
  .font-size-l1 { font-size: 48px; }
  .font-size-l2 { font-size: 30px; }
  .font-size-l3 { font-size: 26px; }
  .font-size-l4 { font-size: 24px; }
  .font-size-l5 { font-size: 20px; }
  .font-size-l6 { font-size: 18px; }

  .nav-title { height: 100%; }
  .content { margin-top: 0; }
  .logo { margin-right: auto; }

  .slogan h1 {
    line-height: 104px;
    letter-spacing: 10px;
  }

  .content { padding: 5rem 2rem 0; }
  #business { margin-top: 15rem; }

  .logo-content { margin: auto auto auto 2rem; }
  
  .about {
    margin-top: 5rem;
    padding-top: 5rem;
  }

  .about-desc-title { text-align: left; }
  .about-top { margin: 4rem 0; }
  .about-grid { display: flex; }
  

  .about-desc {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .about-content { margin-right: 2rem; }
  .about-desc:last-child { margin-right: 0; }
  .about-desc-line { margin: 14px 0; width: 142px; }

  #contract { padding-top: 0; }
  .develop-local { margin-top: 3rem; }
  .local { padding: 3rem 2rem; }
  
  .business-type-desc { margin-left: 1rem; }
  .bus-type { margin-left: 7rem; display: ruby; }

  .mySwiper {
    height: 29rem;
    margin: 2rem 3rem;
  }

  .bus-d { padding: 1.5rem; }
  .bus-title {
    margin-top: 40px;
    line-height: 50px;
  }

  .bus-border { width: 18rem; }
  .bus-con { padding: 0 0.5rem 0 1.5rem; }
  .bus-border, .bus-con { height: 24rem; }
  .bus-zbyy { height: 18rem !important; }

  .swiper-slide > div {
    height: 100%;
    padding: 0 4rem;
  }
  
  .img-mySwiper { height: 23rem; }
  .bus-video {
    padding: 0 3rem;
    margin-top: 2rem;
  }

  .about-top { grid-template-columns: repeat(2, 1fr); }
  .footer div { gap: 20px; }
  
  /* 确保鼠标图标在大屏幕上有合适的尺寸 */
  .mouse {
    width: 45px;
    height: 46px;
  }
  
  /* 大屏幕显示mouse图标，隐藏next图标 */
  .mouse img[src*="mouse.png"] {
    display: block;
  }
  
  .mouse img[src*="next.png"] {
    display: none;
  }
  
  .contact-section {
    background-position: center 20% !important;
    background-size: cover !important;
  }
  

  .develop.contact-section[style*="erth.png"] {
    background-size: 90% auto !important;
    background-position: center 5% !important;
    padding: 6.5rem 0 3.5rem 0 !important;
  }

  @media screen and (min-width:601px) and ( max-width:800px) {
    .subway{
      top:35% ;
    }
    
  }
}



/* 响应式 - 小屏幕通用样式 */
@media screen and (max-width: 600px) {
  #contract {
      margin-top: -12rem;
  }
/* 业务与荣誉区域 */
#business, #honor { padding-top: 5rem; }
#honor { margin-top: -4rem; }
#partner{margin-top: -12rem;}
   .mobile-only {
      display: inline;
    }
  
  /* 移动端loader样式 */
  .loader-content {
    gap: 8px !important;
    max-width: 75vw !important;
    height: 60px !important;
    max-height: 60px !important;
    transform: scale(0.8) !important;
  }
  
  .loader-item {
    width: 60px !important;
    height: 60px !important;
    max-width: 60px !important;
    max-height: 60px !important;
  }
  
  .loader-item:nth-child(3){
    width: 120px !important;
  
    max-width: 120px !important;
    
  }
    .loader-item:nth-child(3) >img{
    width: 120px !important;
  
    max-width: 120px !important;
    
  }

  .background { height: 200vw; }
  .background > img { height: 100%; }

  .font-size-title { font-size: xxx-large; }
  .font-size-l1 { font-size: xx-large; }
  .font-size-l2 { font-size: x-large; }
  .font-size-l3 { font-size: larger; }
  .font-size-l4 { font-size: large; }
  .font-size-l5 { font-size: medium; }
  .font-size-l6 { font-size: math; }

  .nav-title {
    height: 60px;
    width: 100%;
    background-color: rgba(3, 0, 20, 0.8);
  }

  .title-nav{
    display: block;margin-top: 6px; 
    font-weight: 400;
    letter-spacing: 0px;
    line-height: 40.54px;
    color: rgba(255, 255, 255, 1);
    text-align: center;
    font-size: 23.5px;
  }



  .checkbtn { display: block; }

  ul {
    position: fixed;
    width: 100%;
    height: 100%;
    /* background: #2c3e50; */
    top: 70px;
    left: -100%;
    text-align: center;
    transition: all 0.5s;
  }

  nav ul li {
    display: block;
    padding: 5px 0;
    line-height: 20px;
    border-bottom: solid #7E93A8 1px;
  }

  .nav-substitle {
    width: 100%;
    position: relative;
    top: -5px;
  }

  #check:checked ~ ul { left: 0; }
  .nav-text { width: 100%; }

  /* 移动端菜单蒙版 */
  .mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: -1000000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease, visibility 0.5s ease;
  }

  #check:checked ~ .mobile-menu-overlay {
    opacity: 1;
    visibility: visible;
  }

  .slogan h1 {
    width: 70%;
    letter-spacing: 5px;
    line-height: 60px;
    margin: 0 auto;
  }

  .content { padding: 0 0.8rem; }
  .develop { margin-top: 2rem }
  .logo, .logo-content { margin: 0 auto; }

  .partner-logos { grid-template-columns: repeat(2, 170px); }
  .certificate-list {
    grid-template-columns: repeat(1, 100%);
    margin-top: 1rem;
  }

  .partner-logo{
    width: 100px;
    height: 34px;
  }

  .topnav a:not(:first-child) { display: none; }
  .topnav a.icon {
    float: right;
    display: block;
  }

  .topnav.responsive { position: relative; }
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }

  .business-title, .business-content {
    top: 1.5rem;
    right: 1.5rem;
  }
  
  .business-container {
    height: 25vh;
    min-height: 10vh;
    max-height: 40vh;
  }
  
  .business-bg-image {
    height: 100%;
    object-fit: cover;
    object-position: center;
  }

  .about { padding-top: 2rem; }
  .about-grid { 
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    flex-wrap: nowrap;
    /* gap: 0.5rem; */
    margin: 0 auto;
    /* max-width: 90%; */
  }

  .about-desc {
    padding: 0.3rem;
    /* width: 28%; */
    min-width: 80px;
    margin-top: 1rem;
    
  }
  
  .about-desc .inline-block.grid {
    display: flex;
    flex-direction: column;
    /* align-items: center; */
    text-align: center;
  }
  
  .about-desc .inline-block.grid > span {
    margin-bottom: 0.2rem;
  }
  
  .about-desc .inline-block.grid > span img {
    width: 24px;
    height: 24px;
  }
  
 

  .mouse {
    width: 38px;
    height: 39px;
  }
  

  .mouse:hover {
    outline: none;
    outline-offset: 0;
    border-radius: 0;
    box-shadow: none;
    background: transparent;
    transform: none;
  }
  
  .mouse.show {
    top: 95%; 
  }
  

  .mouse img[src*="mouse.png"] {
    display: none;
  }
  
  .mouse img[src*="next.png"] {
    display: block;
  }
  
  .inline-block{
    margin-top:1rem ;
  }
  .about-desc .inline-block {
    text-align: center;
    margin: 0.1rem 0;
    display: flex;
    justify-content: center;
    align-items: baseline;
  }
  
  .about-desc-content {
    font-size: 1.5rem !important;
    line-height: 1.1;
    display: inline-block;
  }
  
  .about-desc-unit {
    font-size: 0.7rem !important;
    vertical-align: top;
    display: inline-block;
    margin-left: 2px;
  }
  
  .about-desc-title {
    font-size: 0.8rem !important;
    display: block;
    margin-top: 0.1rem;
  }
  
  .about-desc + div { display: none; }
  .about-desc-line { margin: 2vw 0; width: 106px; }

  .certificate-desc:not(:first-child) { margin-top: -5rem; }
  
  /* 手机端荣誉证书图片缩小 */
  .certificate-img {
    width: 180px;
  }
  
 /* 每张奖状底座的独立定位 */
.certificate-plinth-1 {
  top: 40.5%;
  left: 52.5%;
  width: 120%;
}

.certificate-plinth-2 {
  top: 40.5%;
  left: 52.5%;
  width: 120.5%;
}

.certificate-plinth-3 {
  top: 40.5%;
  left: 52.5%;
  width: 120%;
}

.certificate-plinth-4 {
  top: 40.5%;
  left: 52%;
  width: 120%;
}
  
  #partner { padding-top: 5rem; }
  #contract { padding-top: 0; }
  .develop-local { margin-top: 0; }
  .local { padding: 1rem 2rem; }

  .bus-type { margin-left: 9vw; }
  .mySwiper {
    height: 170vw;
    margin: 2vw;
  }

  .bus-d {
    height: 93%;
    width: 70vw;
    margin: 0 auto;
    align-content: flex-start;
    padding: 1rem;
  }

  .bus-border {
    width: 70vw;
    height: 82.5vw;
  }

  .bus-con {
    padding: 1vw;
    width: 70vw;
    height: 70vw;
  }

  .bus-title { margin-top: 1.5rem; }
  .bus-desc { font-size: medium; }

  .about-top { grid-template-columns: repeat(1, 1fr); }
  .partner-logo:nth-child(n+41) {
    -webkit-box-reflect: below 0 linear-gradient(transparent 65%, white 200%);
  }

  .relative {
    margin-bottom: -40px;
  }

  .partner-logo{
    width: 120px;
    height: 45px;
  }

 .partner-logo:hover {
  transform: scale(1.15);
}
  
  .contact-section {
    background-position: center 25% !important;
    background-size: cover !important;
    min-height: 500px !important;
  }
  

  .develop.contact-section[style*="erth.png"] {
    background-size: 100% auto !important;
    background-position: center 10% !important;
    padding: 6rem 0 3rem 0 !important;
    min-height: 400px !important;
  }

  /* 手机端四格布局样式 */
  .business-mobile-section {
    display: none;
   
  }
  
  .business-mobile-container {
    /* padding: 1.5rem 0.8rem; */
  }
  
  .business-mobile-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.8rem;
    max-width: 100%;
  }
  
  .business-mobile-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    min-height: 120px;
  }
  
  .business-mobile-item:hover,
  .business-mobile-item.active-mobile {
    transform: translateY(-5px);

    /* box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25); */
  }
  
  .business-mobile-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transition: opacity 0.3s ease;
  }
  
  .business-mobile-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.1) 0%, rgba(0, 0, 0, 0.2) 100%);
    transition: background 0.3s ease;
  }
  
  .business-mobile-item.active-mobile .business-mobile-bg::after {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.1) 0%, rgba(0, 0, 0, 0.2) 100%);
  }
  
  .business-mobile-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 0.8rem;
    color: white;
    z-index: 2;
    transition: all 0.3s ease;
  }
  
  .business-mobile-title {
    font-size: 1rem;
    font-weight: bold;
    margin: 0 0 0.3rem 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
    line-height: 1.2;
    transition: all 0.3s ease;
  }
  
  .business-mobile-item.active-mobile .business-mobile-title {
    color: #fff;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.9);
  }
  
  .business-mobile-desc {
    font-size: 0.7rem;
    line-height: 1.2;
    margin: 0;
    opacity: 0;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8);
    max-height: 0;
    overflow: hidden;
    transform: translateY(-10px);
    transition: all 0.4s ease-in-out;
  }
  
  .business-mobile-item.active-mobile .business-mobile-desc {
    opacity: 1;
    color: #fff;
    max-height: 100px;
    transform: translateY(0);
  }

  .about .develop-title {
    margin-bottom: 16px;

  }


  .subway{
  position: absolute;
  top: 25.2%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: -10000;
}
  
  /* 媒体查询：适应所有小屏幕 */
  @media (max-width: 768px) {
    #business {
      display: none !important;
    }
    
    .business-mobile-section {
      display: block !important;
    }
  }

  @media screen and (max-width: 400px) {
    .subway{
      top: 26.2%;
    }
  }

    @media screen and (min-width: 510px) {
    .subway{
      top: 28.2%;
    }
  }
   
  
  
 
  



}