/*控制cell图片位置*/
   .nav-cell-img{
     position: absolute;
     top: 0;
     left: -5px;
     width: 25px;
     z-index: 15 !important;
    }
  
   .nav-link{
     position: relative;
     z-index: 20 !important;
     font-size: 130%;
     font-weight: bold;
     color: #000 ;
    }
  
   .nav-cell-container{
     position: relative;
     display: flex;
     margin-left: 20px;
    }
  
   #navbarSupportedContent{
     position: relative;
     display: flex;
     margin-right: 0px;
    }

    
    /*控制主菜单和下拉菜单样式*/
    .navbar-nav .nav-item.dropdown:hover .nav-link, 
    .navbar-nav .nav-item.dropdown.show .nav-link { 
     color: #a37070 !important;
     transition: all 0.3s ease;
    }
    
    .navbar-nav .nav-item.dropdown:hover > .dropdown-menu, 
    .navbar-nav .nav-item.dropdown.show > .dropdown-menu { 
     display: block; 
     background-color: #a37070; 
     margin-top: 0; 
     box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1); 
     border-radius: 5px;
    }
   
    .dropdown-menu .dropdown-item:hover {
     color: #ffffff !important; 
     background-color: #a37070 !important; 
    }
   
    .dropdown-menu .dropdown-item.active,.dropdown-menu .dropdown-item:active {
     color: #ffffff !important;
     background-color: #a37070 !important;
    }

    #homebutton:hover/*home键不涉及下拉列表，于是设置id（menu中）单独控制*/{
      color: #a37070 !important;
      transition: all 0.3s ease;
    }