html{   
    width: 100%;   
    height: 100%;   
    
    font-style: sans-serif;   
}   
body{   
    width: 100%;   
    height: 100%;   
    font-family: 'Open Sans',sans-serif;   
    margin: 0;   
    background-color: rgb(253, 255, 255);
}   
 



.logo{
    width:160px;
    height:46px;
    position: relative;
    left:10px;
}
.head-1{
    position: relative;
    height: 200px;
    top: -20px;
    width: 1400px;
    left: 50%;
    margin-left: -700px !important;
    
}
.search{
    width: 25%;            
    margin-top: 25px ;
    margin-left: 0%;
    display: flex;
   
}
.search input{
    float: left;
    flex: 4;
    height: 40px;
    outline: none;
    border: 1px solid #50b6fc;
    
    box-sizing: border-box;
    padding-left: 9px;
}
.search button{
    float: right;
    flex: 1;
    height: 40px;
    background-color: #50b6fc;
    color: white;
    border-style: none;
    outline: none;
}
.search button i{
    font-style: normal;
}
.search button:hover{
    font-size: 16px;
}
.top-1{
    font-size:10px;
    overflow:hidden;
    position: absolute;
    
    top:0px;

}
.top-1 li{
     float:left;
}
.top-1 .top-1-1{
    background: #50b6fc;
    border-radius: 25px;
}
.top-1 .top-1-1 a{
      color: #fff;

}
.top-1 .top-1-1 a:hover{
    color: #fff;
}

.top-1 a:hover{
    color:rgb(162,207,238);
  
}
.top-1 a{
     color:#000;
     display:block ;
     line-height: 90px;
     padding:0px 10px; 
}
ul{
    list-style: none;
}
li{
    list-style: none;

}
.book-1{
    width: 100%;
    margin: 0 auto;
    grid-area: article;  
    background-color: rgb(161, 208, 238);
    border-radius: 25px;
    width: 90%;
}

.tit-1-1{
    width:50%;
    font-size: 30px;
    color: rgb(252, 248, 248);
    letter-spacing: 14px;
    text-align: center;
    background-color:rgb(161, 208, 238);
    border-radius: 25px;
    height: 50px;
    margin-top: 6px;
    margin-bottom: 5px;
    margin:0 auto;
}

a{
    color: #333;
    text-decoration: none;
}
.book-1-1-1 li{
    width:224px;
  
 
}
.book-1-1-1{
    margin-left: 10%;
    display: flex;
    flex-direction: row;            
    flex-wrap: wrap;
  
}
.pic-1 img{
    width: 224px;
}



.tit-1-2{
    font-size:14px;
    font-weight: normal;
    background-color:rgb(3, 11, 43);
    border-radius: 25px;
    width: 40%;
    height: 30px;
    text-align: center;
    line-height: 30px

}
.aa1{
    color: rgb(253, 253, 253);
}
        

.book-2{
    width: 100%;
    margin: 0 auto;
    background-color: #0c5688;
    width: 90%;
    border-radius: 25px;
   
}

.tit-2-1{
    width:50%;
    font-size: 30px;
    color: rgb(252, 248, 248);
    letter-spacing: 14px;
    text-align: center;
    background-color:#0c5688;
    border-radius: 25px;
    height: 50px;
    margin-top: 6px;
    margin-bottom: 5px;
    margin:0 auto;
}



.book-2-1-1 li{
    width:224px;
  
 
}
.book-2-1-1{
    margin-left: 10%;
    display: flex;
    flex-direction: row;            
    flex-wrap: wrap;
   
}
.pic-2 img{
    width: 224px;
}



.tit-2-2{
    font-size:14px;
    font-weight: normal;
    background-color:rgb(125, 146, 240);
    border-radius: 25px;
    width: 40%;
    height: 30px;
    text-align: center;
    line-height: 30px

}
.aa2{
    color: rgb(253, 253, 253);
}
        
.book-3{
    width: 100%;
    margin: 0 auto;
    background-color: #50a0fc;
    width: 90%;
    border-radius: 25px;
}

.tit-3-1{
    width:50%;
    font-size: 30px;
    color: rgb(252, 248, 248);
    letter-spacing: 14px;
    text-align: center;
    background-color:#50a0fc;
    border-radius: 25px;
    
    height: 50px;
    margin-top: 6px;
    margin-bottom: 5px;
    margin:0 auto;
    grid-area: aa;
}
.aa3{
    
    text-align: center;
    margin-top: 5px;
    margin-bottom: 20px;
    display: flex;
    flex-direction: row;            
    flex-wrap: nowrap; 
    float: left;
    margin-left: 30%;
    width: 50%;
}
.aa3 a{
    text-align: center;
    font-size:20px;
    line-height:60px;
    margin-right: 20px;
    margin-left: 20px;
    margin-top: 3px;
    color: #fff;
    background: #84c8f7;
    border-radius: 25px;
}
.book-3-2{
    display: flex;
    flex-direction: row;            
    flex-wrap: wrap; 
    float: left;
}
.book-3-2 li{
    margin-right: 20px; 
  
}

.tit-3-2{
    font-size:14px;
    font-weight: normal;
    background-color:rgb(94, 131, 187);
    border-radius: 25px;
    width: 40%;
    height: 30px;
    text-align: center;
    line-height: 30px

}