* {
    margin: 0;
    padding: 0;
}
html {
  scroll-behavior: smooth;
}
.raise {
    height: 120px;
}
.content{
  width: 100%;
  min-height: calc(100vh - 176px);
  background: #FDFDFD;
}
.section-bg{
  width: 100%;
  height: 95vh;
  background-size: 100% 100%;
}
.section-content{
  width: 100%;
  padding: 30px 0 40px 0;
}
.w1400{
  width: 1400px;
  margin: 0 auto;
}
.section-baner{
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}
.white-bg{
  background: #FFFFFF;
}
.gray-bg{
  background: #F7F7F9;
}
.cate_title{
  font-weight: 500;
  font-size: 36px;
  color: #2A4365;
}
.cate_line{
  width: 120px;
  height: 6px;
  background-color: #E63A0C;
  margin: 20px 0;
}
.cate_ul{
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.cate_li{
  width: 30%;
  background: #FFFFFF;
  box-shadow: 0px 4px 20px 0px rgba(15,52,96,0.2);
  border-radius: 15px;
}
.cate_img{
  width: 100%;
  height: 200px;
}
.cate_img img{
  width: 100%;
  height: 100%;
  display: block;
}
.cate_box{
  width: 100%;
  padding: 40px 24px;
  box-sizing: border-box;
}
.cate_name{
  text-align: center;
  font-weight: 500;
  font-size: 20px;
  color: #2A4365;
}
.cate_content{
  margin-top: 20px;
  height: 150px;
  font-weight: 400;
  font-size: 18px;
  line-height: 32px;
  color: #333333;
}

.setion_btn{
  font-weight: 400;
  font-size: 16px;
  color: #4C8CC3;
  cursor: pointer;
  margin-top: 20px;
}
.setion_btn .arrow {
  display: inline-block;
  margin-left: 8px;             /* 和文字保持距离 */
  width: 0;
  height: 0;
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
  border-left: 8px solid #4C8CC3;
}
.masterol_article{
  width: 100%;
  margin-top: 30px;
}
.article_title{
  font-weight: 500;
  font-size: 30px;
  color: #2A4365;
}
.article_desc{
  font-weight: 300;
  font-size: 20px;
  color: #E63A0C;
  margin-top: 10px;
}
.article_banner{
  width: 100%;
  display: flex;
  align-items: stretch;
  margin-top: 30px;
}
.article_text{
  width: 70%;
  font-weight: 300;
  font-size: 18px;
  color: #444444;
  line-height: 50px;
}
.article_text p:not(:first-child){
  margin-top: 30px;
}
.article_process{
  width: 28%;
  margin-left: 2%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.process_title{
  font-weight: 500;
  font-size: 20px;
  color: #2A4365;
}
.process_img{
  flex: 1;
  width: 100%;
  position: relative;
  cursor: zoom-in;
  overflow: hidden;
}
.process_img img{
  width: 100%;
  height: 100%;
  display: block;
}
/* 半透明遮罩 */
.zoom-mask {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.45);
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 1;
  transition: opacity .3s;
}

/* 鼠标悬浮才显示 */
.process_img:hover .zoom-mask {
  opacity: 1;
}

/* 内容容器 */
.zoom-content {
  text-align: center;
  color: #fff;
}

/* 图标 */
.zoom-icon {
  font-size: 36px;
  margin-bottom: 8px;
}

/* 文字 */
.zoom-text {
  font-size: 16px;
}
.image-viewer-mask {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0,0,0,0.75);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 99999999;
}
.image-viewer-container {
  display: flex;
  justify-content: center;
  align-items: center;
  max-width: 100%;
  max-height: 100%;
}

.image-viewer-container img {
  max-width: 100vw;
  max-height: 100vh;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 0 20px rgba(0,0,0,0.4);
  cursor: zoom-out;
}

.teacher-swiper-container {
  width: 1220px;
  margin: 30px auto;
  position: relative;
}
.teacher-swiper {
  overflow: hidden;
}
.swiper-wrapper { display:flex !important; }
.teacher-card {
  background: #ffffff;
  border-radius: 10px;
  height: 700px;
  overflow: hidden;
  box-shadow: 0px 4px 20px 0px rgba(15,52,96,0.2);
}

.teacher-img {
  width: 100%;
  height: 100%;
  display: block;
}
/* 按钮放到外层 */
.teacher-nav-prev,
.teacher-nav-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  cursor: pointer;
  color: #ffffff;
  background-color: #0F3460;
  width: 50px;
  height: 50px;
  border-radius: 50%;
}
.teacher-nav-prev::after,
.teacher-nav-next::after {
  font-size: 20px;
}
/* 左侧往外偏移 */
.teacher-nav-prev {
  left: -90px;   /* ← 根据视觉再微调，比如 -40 / -80 */
}

/* 右侧往外偏移 */
.teacher-nav-next {
  right: -90px;
}
.unified_article{
  width: 100%;
  margin-top: 30px;
}
.unified_title{
  font-weight: 400;
  font-size: 20px;
  color: #333333;
}
.unified_banner{
  display: flex;
  align-items: stretch;
  margin-top: 30px;
}
.unified_img{
  width: 355px;
  margin-right: 60px;
}
.unified_img img{
  width: 100%;
  height: 100%;
  display: block;
}
.unified_ul{
  flex: 1;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
}
.unified_li{
  width: 50%;
  display: flex;
  align-items: center;
}
.unified_num{
  width: 60px;
  height: 60px;
  background: #E0E3EA;
  font-weight: 400;
  font-size: 32px;
  color: #0F3460;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}
.unified_text{
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  margin-left: 40px;
}
.unified_name{
  font-weight: 400;
  font-size: 24px;
  color: #333333;
}
.unified_desc{
  font-weight: 400;
  font-size: 18px;
  color: #666666;
}
.model_article{
  width: 100%;
  margin-top: 30px;
}
.model_banner{
  width: 100%;
  display: flex;
  align-items: stretch;
}
.model_img{
  width: 620px;
  margin-left: 50px;
}
.model_img img{
  width: 100%;
  height: 100%;
  display: block;
}
.model_ul {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(2, 1fr); /* 两列 */
  grid-gap: 40px 40px; /* 行列间距，可按设计稿调整 */
}

.model_li {
  border-radius: 10px;
  box-shadow: 0px 4px 20px 0px rgba(15,52,96,0.2);
  background: #FFFFFF;
  display: flex;
  flex-direction: column;
  padding: 15px;
  box-sizing: border-box;
  height: 150px;
}

/* 最后一个占满两列 */
.model_li:last-child {
  grid-column: span 2;
}
.model_text{
  display: flex;
  align-items: center;
}
.model_num{
  width: 35px;
  height: 35px;
  background: #E0E3EA;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}
.model_name{
  font-weight: 500;
  font-size: 18px;
  color: #2A4365;
  margin-left: 10px;
}
.model_desc{
  margin-top: 15px;
  font-weight: 400;
  font-size: 15px;
  color: #9E9E9E;
}
.feature_article{
  width: 100%;
  margin-top: 30px;
}
.feature_ul{
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.feature_li{
  width: 18%;
  background: #F7F7F9;
  box-shadow: 0px 4px 10px 0px rgba(15,52,96,0.2);
  border-radius: 20px;
  padding: 30px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.feature_img{
  width: 60px;
  height: 60px;
}
.feature_img img{
  width: 100%;
  height: 100%;
}
.feature_name{
  font-weight: 400;
  font-size: 24px;
  color: #3E74B6;
  margin-top: 20px;
}
.feature_desc{
  margin-top: 25px;
  font-weight: 400;
  font-size: 18px;
  color: #444444;
  line-height: 50px;
  text-align: center;
}
.feature_progress{
  width: 100%;
  background: #F7F7F9;
  border-radius: 20px;
  padding: 40px 0;
  margin-top: 70px;
}
.progress_title{
  font-weight: 500;
  font-size: 36px;
  color: #2A4365;
  text-align: center;
}
.progress_ul{
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-around;
}
.progress_li{
  width: 25%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.progress_num{
  font-weight: 500;
  font-size: 60px;
  color: #0F3460;
}
.progress_name{
  font-weight: 400;
  font-size: 20px;
  color: #1C4C86;
  margin: 30px 0;
}
.progress_line{
  width: 80%;
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(90deg, #183B66 0%, #E94560 100%);
}
.features_article{
  margin-top: 30px;
  width: 100%;
}
.features_ul{
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}
.features_li{
  width: 48%;
  display: flex;
  align-items: flex-start;
  margin-bottom: 60px;
}
.features_image{
  width: 120px;
  height: 120px;
}
.features_image img{
  width: 100%;
  height: 100%;
  display: block;
}
.features_text{
  margin-left: 30px;
}
.features_name{
  font-weight: 800;
  font-size: 24px;
  color: #2A4365;
}
.features_desc{
  font-weight: 400;
  font-size: 20px;
  color: #333333;
}

.nav_list{
  background: #FFFFFF;
  box-shadow: 0px 4px 10px 0px rgba(0,0,0,0.2);
  border-radius: 6px;
  position: fixed;
  right: 10px;
  top: 180px;
}
.nav-li{
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 16px 5px;
  box-sizing: border-box;
  cursor: pointer;
  min-width: 88px;
}
.nav-icon{
  width: 36px;
  height: 36px;
  margin-bottom: 5px;
}
.nav-icon img{
  width: 100%;
  display: block;
}
.nav-name{
  font-weight: 500;
  font-size: 14px;
  color: #444444;
}
.nav-li:hover{
  background: linear-gradient( 225deg, #2A47CA 0%, #172B84 100%);
  border-radius: 6px;
}
.nav-li:hover .nav-name{
  color: #FFFFFF;
}
.nav-li.active{
  background: linear-gradient(225deg, #2A47CA 0%, #172B84 100%);
  border-radius: 6px;
}
.nav-li.active .nav-name{
  color: #FFFFFF;
}
.li-link{
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}