body{
    /* background: #f0f6f2; */
}
.topnav {
    overflow: hidden;
    background: #fff;
    border-bottom: 1px solid rgb(209, 206, 206);
    position: fixed;  
    top: 0;  
    left: 0;  
    width: 100%;   
    z-index: 9999;  
  }
.topnav a {
    float: left;
    display: block;
    color: black;
    text-align: center;
    text-decoration: none;
  }
  
  /* 改变悬停时链接的颜色 */
  .topnav a:hover {
    background-color: #17abe3;
    color: black;
  }
  
  /* 添加一个活动类以突出显示当前页面 */
  .topnav a.active {
    width: 60%;
    background: #fff;
    color: black;
  }
 
  /* 隐藏应该在小屏幕上打开和关闭 topnav 的链接 */
  .topnav .icon {
    display: none;
  }
.bar-lift{
    height: 100px;
    display: flex;
    align-items: center;
}
.bar-right{
    width: 8%;
    height: 100px;
    line-height: 100px;
    font-size: 1.40rem;
    font-weight: 600;
}
.logoImg{
    width: 4.20rem /* 80/16 */;
    height: 4rem;
    margin: 0 1.5rem 0 6.5rem;
}

img{
    height: 100%;
    width: 100%;
}

.banner{
    height: 680px;
    width: 100%;
    margin-top: 100px;
}
.banxin{
    max-width: 103.75rem /* 1660/16 */;
    margin: auto;
    padding-top: 2.5rem /* 40/16 */;
    width: 80%;
}
.title{
    display: flex;
    align-items: center;
    height: 80px;
    width: 100%;
    font-size: large;
    margin: 1.25rem 0 /* 20/16 */;
    border-bottom: 1px solid rgb(209, 206, 206);
}
.title img{
    width: 70px;
    height: 4.375rem /* 70/16 */;
}
.title span{
    font-size: 2.8rem;
    font-style: italic;
    font-weight: 600;
    color: #17abe3;
    text-shadow: 1px 1px #BAE6EF,2px 2px #BAE6EF,3px 3px #BAE6EF,4px 4px #BAE6EF,5px 5px #BAE6EF;
}
h3{
    margin: .625rem /* 10/16 */;
    letter-spacing: 3px;
}



.subhead{
  font-weight: bold;
  margin: 2.5rem 0;
}
.card{
  margin-left: 2.5rem;
}
.card-body{
  padding: 2.25rem;
}
.video{
    border-radius: 1.5625rem /* 25/16 */;
    object-fit: cover;
    width: 100%;
    height: 54%;
}
.agora_Agora{
    display: flex;
    justify-content:space-evenly;
}
.agora_Agora1{
    width: 30%;
    height: auto;
    border: 2px solid #eee;
    margin: .625rem /* 10/16 */;
}
.contact p{
   font-size: 24px;
   margin: .625rem /* 10/16 */;
}
.contact a{
  color: #17abe3;
}

.addresLsink {
  background: #333;
  color: white;
  padding: 15px;
  margin: 20px auto;
}

.addresLsink ul {
  display: flex;
  justify-content: space-around;
  list-style: none;
  padding: 0;
  margin: 0;
}

.addresLsink li {
  display: flex;
  align-items: center;
  margin: 0 10px;
  padding: 0;
}

.addresLsink img {
  height: 6.25rem /* 100/16 */;
  width: 6.25rem /* 100/16 */;
  object-fit: cover;
  border-radius: 4px;
  margin-left: 8px;
}

.addresLsink a {
  color: #40a9ff;
  text-decoration: none;
}

.addresLsink a:hover {
  text-decoration: underline;
}

.footer{
    display: flex;
    justify-content: center;
    align-items: center;
    margin: auto;
    height: auto;
    text-align: center;
    background-color:#efefef;
}
.footer a{
  color: #17abe3;
}
.beian{
    width: 1.25rem;
    height: 1.25rem;
    margin-bottom: 10px;
}

@media screen and (max-width: 640px) {
.topnav a:not(:first-child) {display: none;}
.topnav a.icon {
  float: right;
  display: block;
}
.topnav.responsive {position: relative;}
  .topnav.responsive a.icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a.bar-right {
    float: none;
    display: block;
    width: 100%;
  }
  .topnav.responsive a.icon:last-child{
    width: 20%;
  }
  .topnav.responsive a:first-child  {
    float: none;
    display: block;
    text-align: center;
  }
  .topnav a.active {
    width: 70%;
  }
  .logoImg{
    width: 46px;;
    height:46px;
    margin: 0 0.5rem 0 0.5rem;
  }
  .bar-lift h2{
      font-size:16px;
      font-weight: 600;
  }
  .bar-right{
    width: 20%;
  }
  .banner{
    margin-top: 100px;
    height: auto;
    width: 100%;
}
.title img{
    width: 60px;
    height: 3.35rem /* 70/16 */;
}
.title span{
    font-size: 1.8rem;
}
h3{
    font-size: 20px;
}
.contact p{
    font-size: 18px;
 }
 
 .footer{
   font-size: 0.9rem /* 16/16 */;
 }
}