*{
    margin: 0 ;
    padding: 0;
    box-sizing: border-box;
}

body{
    background-color: #090d13;
}

.main{
    width:100%;
    margin: 0 auto;
    /*background-color: antiquewhite;*/
}

.top{
    width: 100%;
    height: 100px;
    background-image: url(../img/logo2.png);
    background-size: 100% 100%;
    background-repeat: no-repeat;
}

.nav{
    width: 100%;
    height: 80px;
    background-color: #e38617;
    display: flex;
    /* border: dashed 1px red; */
}

.nav-left{
    width: 60%;
    height: 80px;
    display: flex;
    background-image: url(../img/cslogo.png);
    background-position: 15px center;
    background-size: auto 65px;
    background-repeat: no-repeat;
}

.nav-right{
    width: 40%;
    height: 80px;
    display: flex;
    justify-content: center;
}

.nav-right a{
    text-decoration: none;
    line-height: 80px;
    color: #000000;
    text-align: center;
    text-shadow: 2px 3px 2px dimgray;
    width: calc(100%/3);
}

.nav-right a:hover:not(.active){
    background-color: rgba(210, 105, 30, 0.5);
}

.active{
    background-color: chocolate;
    font-size: 25px;
    font-weight: bold;
}

.inactive{
    font-size: 23px;
    font-weight: bold;
}

img{
    width: 100%;

}

.main{
    width: 100%;
}

.qa{
    margin-top: 50px;
    font-size: 60px;
    color: #ffffff;
    font-family: 华文琥珀;
    text-align: center;
}

.qa1{
    margin: 0 auto;
    width: 60%;
    font-size: 30px;
    font-family: 楷体;
    color: #ffffff;
}

.qa1 p{
  margin-top: 50px;
}

.foot{
    margin: 0 auto;
    width: 60%;
    font-size: 20px;
    font-family: 楷体;
    color: #ffffff;
    text-align: center;
}