.nav ul li:nth-child(2) a{
    color:#288ece;}
    .nav ul li:nth-child(2) {
        border-bottom: 1px solid #288ece;
    }
.nav ul li a {
    color: #c5c6c5;
    font-size: 16px;

}
/* .nav ul li:hover a {
    color:#288ece;
} */
.nav ul li {
    height:38px ;
}
/* .nav ul li:hover{

    border-bottom: 1px solid #288ece;

} */
.nav ul li:nth-last-child(1){
   
    font-weight: 700;
    margin-right: 0;
}
.nav ul li:nth-last-child(1) a {
    color: #288ece;
}



.synopsis {
    position: relative;
    
    background: url(../images/beibei_02.jpg) no-repeat;
    background-position: left 400px;
}

.navigation ul {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: -50px;
    width: 700px;
}
.navigation ul li{
    float: left;
    width: 150px;
    height: 50px;
    font-size: 16px;
    margin-right: 1px;
    background-color: #aab0b7;
    text-align: center;
    line-height: 50px;
    font-size: 16px;
    color: #fff;
    opacity: 0.4;


}
.navigation  li a {
    color: #fff;
}
.navigation>ul>li:nth-child(1) {
    height: 48px;
    margin-right: 11px;
    background-color: #fff;
    
    opacity: 1;
    border-top:2px solid #288ece;
}
.navigation>ul>li:nth-child(1) a{
    color: black;
}
.nav-b {
    overflow: hidden;
    margin: 0 auto;
    width: 1200px;
    font-size: 14px;
    color: #464646;
    height: 1076px;
}
.jianjieImg {
    margin-top: 118px;
    width: 1200px;
  
}
.jianjieImg img{
    width: 100%;
}
.nav-b h5 {
    margin-top: 80px;
    font-weight: 400;
    font-size: 14px;

}
.nav-b p {
    margin-top: 60px;
    line-height: 36px;
    
}
.xian2 img {
    margin-top: 60px;
}