html, body{
  padding: 0;
  margin: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}
iframe{
  height: 100%;
}
p,ul,li,image{
  padding: 0;
  margin: 0;
}
h1,h2,h3,h4,h5,h6,p{
  padding: 0;
  margin: 0;
  font-weight: normal;
}
input{
  border: none;
}
input:focus {
  border: none;
  outline: none;
}
.page{
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: space-between;
}
.phone{
  display: none;
}
.left-nav{
  width: 15.6%;
  background: linear-gradient( to bottom, #4CB5D7 38%, #6BBC35 150%);
}
.right-info{
  width: 19.8%;
  height: 100%;
  background: #F5F8FD;
}
.middle-video{
  flex: 1;
  position: relative;
  padding: 36px 48px 0 48px;
  overflow-y: auto;
   scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE/Edge */
  overflow: -moz-scrollbars-none;
  background: #fff;
}
.item:last-child{
  margin-bottom:  36px;
}
.mask{
  position: fixed;
  left: 0;
  right: 0;
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9;
  background: rgba(255,255,255,0.8);
}
.middle-video::-webkit-scrollbar, .base-container::-webkit-scrollbar {
  display: none; /* Chrome/Safari/Opera */
}
.empty-box{
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}
.empty-box img{
  width: 150px;
}
.empty-box p{
  font-weight: 400;
  font-size: 14px;
  color: #999999;
  line-height: 20px;
}
/* 左侧栏目 */
.nav{
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
  overflow: hidden;
}
.project{
  margin-bottom: 28px;
  font-weight: 400;
  font-size: 22px;
  color: #FFFFFF;
  line-height: 30px;
  text-align: center;
}
.logo img {
  width: 169px;
  margin: 45px auto 20px auto;
}
#middle-tab{
  width: 100%;
  flex: 1;
}
.item-tab{
  width: calc(100% - 48px);
  padding: 12px 24px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  cursor: pointer;
  color: #fff;
}
.item-tab img{
  width: 20px;
  margin-right: 12px;
}
.active{
  background: rgba(255,255,255,0.16);
}
.copyright{
  margin-bottom: 45px;
  width: 100%;
  font-weight: 400;
  font-size: 12px;
  color: rgba(255,255,255,0.8);
  line-height: 17px;
  color: #fff;
}
.copyright p{
  display: flex;
  align-items: center;
  justify-content: flex-start;
  margin-top: 12px;
  width: calc(100% - 24px);
  margin-left: 24px;
}
.copyright img{
  width: 20px;
  margin-right: 6px;
}
.small-logo img{
  width: 49px;
  margin: 36px auto 140px auto;
}
-nav {
  width: 15.5%;
  transition: width 0.3s;
  position: relative;
}
.item-tab span {
  transition: opacity 0.2s;
}
.content-section {
  display: none;
}
.content-section.active {
  display: flex;
  flex-direction: column;
  height: 100%;
}
.inner-default{
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
}
.inner-default img{
  width: 300px;
}
/* 列表页面 */
.one-floor{
  display: flex;
  justify-content: space-between;
  align-items: center;
}
#toggleNav img, .toggleNav img{
  width: 32px;
  margin-left: -12px;
  cursor: pointer;
}
.search-box{
  width: 188px;
  height: 32px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255,255,255,0.32);
  border-radius: 17px;
  border: 1px solid #DCDFE6;
}
.search-box .search-icon{
  width: 14px;
}
.search-box input{
  flex: 1;
  margin: 0 10px;
  width: 85%;
}
.flex-content{
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.video-box{
  display: flex;
  flex-wrap: wrap;
  display: flex;
  align-items: flex-start;
  column-gap: 22px;
  row-gap: 32px;
  /* height: 100%; */
}
.video-box .item{
  overflow: hidden;
  cursor: pointer;
}
.video-box .item img{
  min-height: 150px;
  width: 100%;
  border-radius: 12px;
  background-color: #f2f2f2;
  overflow: hidden;
}
.title{
  width: 100%;
  margin-top: 5px;
  white-space: nowrap;    
  overflow: hidden;         
  text-overflow: ellipsis;  
  font-weight: 400;
  font-size: 18px;
  color: #333333;
  line-height: 25px;
}
.title:hover{
  color: #4CB5D7;
}
.introduce{
  margin-top: 2px;
  width: 100%;
  white-space: nowrap;    
  overflow: hidden;         
  text-overflow: ellipsis;  
  font-weight: 400;
  font-size: 14px;
  color: #666666;
  line-height: 20px;
  letter-spacing: 1px;
}
.relative-position{
  position: relative;
}
.all-introduce{
  position: absolute;
  top:0;
  left: 0;
  background: rgba(0,0,0,0.5);
  color: #fff;
}
.normal-tab{
  width: 46px;
  height: 20px;
  font-weight: 400;
  font-size: 12px;
  color: #999999;
  line-height: 20px;
  text-align: center;
  background: #F5F8FD;
  border-radius: 10px;
  cursor: pointer;
}
.tab-box{
  gap:12px;
  margin: 28px 0 12px 0;
}
.active-tab{
  background: #4CB5D7;
  color: #fff;
}
.video-title{
  font-weight: 400;
  font-size: 20px;
  color: #333333;
  line-height: 28px;
}
.filter-box{
  padding: 18px 0 18px 28px;
  margin-bottom: 20px;
  font-weight: 400;
  font-size: 16px;
  color: #999999;
  line-height: 22px;
  background: #F5F8FD;
}
.filter-one, .filter-two{
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 14px;
}
.line{
  width: 1px;
  height: 14px;
  background: #DCDFE6;
}
.filter-tab{
  cursor: pointer;
  color: #666666;
}
.margin-bottom{
  margin-bottom: 15px;
}
.tab-weight{
  color: #4CB5D7;
}
.paging-box{
  display: flex;
  justify-content: center;
  align-items: center;
  gap:8px;
  margin-top: 40px;
}
.page-prev, .page-next, .page-number{
  width: 32px;
  height: 32px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: 400;
  font-size: 14px;
  color: rgba(0,0,0,0.88);
  cursor: pointer;
  background: #FFFFFF;
  border-radius: 6px;
  border: 1px solid rgba(0,0,0,0.15);
}
.page-prev img, .page-next img{
  width: 16px;
}
.active-page{
  color: #4CB5D7;
  border: 1px solid #4CB5D7;
}
/* 右边简介 */
.info-box{
  padding: 90px 32px 0 32px;
}
.base-info h2{
  font-weight: 400;
  font-size: 24px;
  color: #333333;
  line-height: 33px;
}
.base-container{
  margin: 12px 0 33px 0;
  padding: 15px 0 25px 0;
  max-height: 400px;
  overflow-y: auto;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE/Edge */
  overflow: -moz-scrollbars-none;
  font-weight: 400;
  font-size: 14px;
  color: #666666;
  line-height: 22px;
  text-align: left;
  border-top: 1px solid #DCDFE6;
  border-bottom: 1px solid #DCDFE6;
}
.ewm-info h3{
  font-weight: 400;
  font-size: 14px;
  color: #666666;
  line-height: 20px;
}
.ewm-info p{
  margin-top: 4px;
  font-weight: 400;
  font-size: 18px;
  color: #333333;
  line-height: 25px;
}
.ewm-info img{
  width: 206px;
  height: 206px;
}
.ewm-box{
  width: 100%;
  display: flex;
  justify-content: center;
  margin-top: 28px;
}
/* 详情页 */
.video{
  /* height: 643px; */
  /* border-radius: 8px; */
  overflow: hidden;
}
.video video{
  border-radius: 8px;
}
.video-recommend{
  display: flex;
  width: 100%;
  height: 205px;
  gap: 22px;
  padding-bottom: 50px;
  overflow: hidden;
}
.video-recommend .item{
  width: 25%;
  height: fit-content;
  overflow: hidden;
  cursor: pointer;
}
.video-recommend .item img{
  width: 100%;
}
.recommend-title{
  margin: 15px 0 8px 0;
  font-weight: 400;
  font-size: 14px;
  color: #666666;
  line-height: 20px;
}
.video-name{
  margin-bottom: 17px;
  font-weight: 500;
  font-size: 24px;
  color: #333333;
  line-height: 33px;
}
.basic-info, .basic-info-detail{
  display: flex;
  gap: 12px;
  align-items: center;
  margin: 35px 0 4px 0;
  font-weight: 400;
  font-size: 14px;
  color: #666666;
  line-height: 20px;
}
.basic-info-detail{
  margin-top: 20px;
}
.slogan{
  margin-left: 32px;
}
.highlight {
  color: #4CB5D7;
}
.inner-default p{
  font-weight: 400;
  font-size: 16px;
  color: #666666;
  line-height: 33px;
}
#loading-text {
  font-size: 16px;
}

#dots {
  display: inline-block;
  position: relative;
  height: 15px; /* 点的高度 */
}

#dots span {
  display: inline-block;
  width: 6px; /* 点的宽度，包括间距的一半 */
  height: 15px; /* 与#dots高度相同 */
  background-color: black; /* 点的颜色 */
  opacity: 0;
  position: absolute;
  top: 0;
  left: 0;
  animation: dotBlink 1s infinite; /* 应用动画，但初始不显示 */
}

#dots span:nth-child(1) { animation-delay: 0s; left: 25px; }
#dots span:nth-child(2) { animation-delay: 0.33s; left: 37px; } /* 间距为6px */
#dots span:nth-child(3) { animation-delay: 0.66s; left: 49px; } /* 间距为6px */

@keyframes dotBlink {
  0%, 100% { opacity: 0; }
  50% { opacity: 1; }
}