.c-nav1 {
    display: flex;
    justify-content: space-between;
}
.c-nav li a {
    margin-right: 0;
}
#c-n li a::after {
    left: 50%;
    transform: translateX(-50%);
}
.join{

}
.join h5{
    font-size: 30px;
    font-family: Source, Source Han Sans CN;
    font-weight: 400;
    color: #081033;
    text-align: center;
    margin: 80px 0 40px 0;
}
.join h6{
font-size: 24px;
font-family: Source Han Sans CN-Medium, Source Han Sans CN;
font-weight: 500;
color: #081033;
line-height: 36px;
margin-top: 48px;
position: relative;    margin-bottom: 20px;
}
.join h6::after{
    position: absolute;
    content: '';
    width: 53px;
    height: 4px;
    background: #EF9500;
    border-radius: 0px 0px 0px 0px;
    opacity: 1;
    bottom: -8px;
    left: 2px;
}
.join-c{
    border-top: 1px solid #E0E0E0;
}
.join-c p{
font-size: 18px;
font-family: Source, Source Han Sans CN;
font-weight: 400;
color: #4D4D4D;
line-height: 36px;

}
@media (max-width:768px){
.join h5 {
    font-size: 20px;
    font-family: Source, Source Han Sans CN;
    font-weight: 400;
    color: #081033;
    text-align: center;
    margin: 20px 0 20px 0;
}
.join h6::after {
    position: absolute;
    content: '';
    width: 6%;
    height: 3px;
    background: #EF9500;
    border-radius: 0px 0px 0px 0px;
    opacity: 1;
    bottom: -3px;
    left: 0.5px;
}
.join h6 {
    font-size: 16px;
    font-family: Source Han Sans CN-Medium, Source Han Sans CN;
    font-weight: 500;
    color: #081033;
    line-height: 36px;
    margin-top: 20px;
    position: relative;
    width: auto;
    margin-bottom: 20px;
}
.join-c p {
    font-size: 14px;
    font-family: Source, Source Han Sans CN;
    font-weight: 400;
    color: #4D4D4D;
    line-height: 26px;
}
}