*{
  margin: 0px;
  padding: 0px;
}

div.logo-box{
  display: flex;
  position: absolute;
  top: 1.18rem;
  width: 100%;
  justify-content: center;
}
div.logo-box img{
  width: 4.47rem;
  height: 0.89rem;
}
li.car img,li.houtai img{
   width: 7.25rem;
   height: 2.63rem;
}

 ul{
  list-style: none;
  position: absolute;
  top: 5.96rem;
  bottom: 4.91rem;
  width: 100%;
 display: flex;
 justify-content: center;
 align-items: center;
 }
 li.car button img:hover{
  background: url('../images/car-hover.png')  no-repeat ;
  background-size: 7.25rem 2.63rem;
  cursor: pointer;
}
 li.car{
   margin-right: 1.2rem;
 }
 li.houtai button img:hover{
  background: url('../images/hover.png')  no-repeat ;
  background-size: 7.25rem 2.63rem;
  cursor: pointer;
 }