@media only screen and (min-device-width: 768px){
  header {
    position: fixed;
    top: 0;
    width: 19.2rem;
    height: .8rem;
    margin: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 .01rem .5rem rgba(0, 0, 0, 0.02);
    backdrop-filter: blur(.0995rem);
    /* backdrop-filter: saturate(180%) blur(1px); */
    
  }
  .logo {
    width: 1.2816rem;
    height: .36rem;
    margin-left: 0.067rem;
    /* background-image: url("D:/code/shiyuanH5/images/Web_Res_build001/page1_index/logo.png"); */
    background-image: url("../images/home_page/logo.png");
    background-size: cover;
    position: absolute;
    top: .19rem;
    left: 1.1834rem;
  }
  .items {
      display: flex;
      flex-direction: row;
      align-items: flex-start;
      padding: 0;
      gap: .85rem;
      position: absolute;
      width: 7rem;
      height: .28rem;
      left: 4.1534rem;
      top: .25rem;
  
      .shouye{
        margin-left: 0;
      }
  }
  header li {
    float: left;
    font-size: .2rem;
    margin-left: 0.85rem;
    text-align: center;
    line-height: .28rem;
  }
  header li:hover {
    cursor: pointer;
  }
  header li:hover #nav_1{
    color: rgba(0, 105, 226, 1);
  }
  header li:hover #nav_2{
    color: rgba(0, 105, 226, 1);
  }
  header li:hover #nav_3{
    color: rgba(0, 105, 226, 1);
  }
  header li:hover #nav_4{
    color: rgba(0, 105, 226, 1);
  }
  header li:hover #nav_5{
    color: rgba(0, 105, 226, 1);
  }
  .scrollup {
    width: .8rem;
    height: .8rem;
    background-color: rgba(255, 255, 255, 0.4);
    position: fixed;
    bottom: .5rem;
    right: .5rem;
    z-index: 100;
    border-radius: .6667rem;
    display: none;
  }
  .scrollup:hover {
    cursor: pointer;
    box-shadow: .01rem .01rem .05rem .05rem rgb(0,0,0,.1);
  }
  .scrollup img {
    width: .2133rem;
    height: .3733rem;
    background-size: cover;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%) rotate(90deg);
  }  
}




@media only screen and (max-device-width: 768px){
  header {
    position: fixed;
    top: 0;
    width: 3.75rem;
    height: .56rem;
    margin: 0;
    z-index: 100;
    background-color: #ffffff;
    box-shadow: 0 .01rem .5rem rgba(0, 0, 0, 0.02);
    backdrop-filter: blur(.0995rem);
    /* backdrop-filter: saturate(180%) blur(1px); */
    
  }
  .logo {
    width: .69rem;
    height: .1938rem;
    /* background-image: url("D:/code/shiyuanH5/images/Web_Res_build001/page1_index/logo.png"); */
    background-image: url("../images/home_page/logo.png");
    background-size: cover;
    position: absolute;
    top: .17rem;
    left: 1.53rem;
  }
  .items{
      position: absolute;
      width: 3.75rem;
      height: 8.12rem;
      top: .5rem;
      background-color: #EEEEEE;
      display: none;
  }
  .daohang{
    position: absolute;
    width: 3.75rem;
    height: 1.96rem;
    background-color: #FFFFFF;
  }
  header li {
    font-size: .12rem;
    margin-left: .18rem;
    margin-top: .18rem;
    line-height: .18rem;
  }
  
  header li:hover {
    cursor: pointer;
  }
  header li:hover {
    cursor: pointer;
  }
  header li:hover #nav_1{
    color: rgba(0, 105, 226, 1);
  }
  header li:hover #nav_2{
    color: rgba(0, 105, 226, 1);
  }
  header li:hover #nav_3{
    color: rgba(0, 105, 226, 1);
  }
  header li:hover #nav_4{
    color: rgba(0, 105, 226, 1);
  }
  header li:hover #nav_5{
    color: rgba(0, 105, 226, 1);
  }
  .scrollup {
    display: none;
  } 
}