/*导航*/
.section-nav ul{
    display: flex;
    flex-wrap: wrap;
    font-size: .3rem;
}
.section-nav ul li{
    width: 25%;
    text-align: center;
}
.section-nav ul li a{
    height: .8rem;
    line-height: .8rem;
}
.section-nav ul li:nth-child(-n+4){
    /*border-bottom: 1px solid ;*/
}
.section-nav ul li .b{
    color: #f50100;
}
/*1px边框*/
.border-1px-bottom { border-bottom: 1px solid #ccc }
.border-1px-right { border-right: 1px solid #ccc }
@media screen and (-webkit-min-device-pixel-ratio: 2) {
    .border-1px-bottom { border-bottom: 0.5px solid #ccc }
    .border-1px-right { border-right: 0.5px solid #ccc }
}
@media screen and (-webkit-min-device-pixel-ratio: 3) {
    .border-1px-bottom { border-bottom: 0.333333px solid #ccc }
    .border-1px-right { border-right: 0.5px solid #ccc }
}
.section-course-swiper .c-course-box1{
    margin-top: .25rem;
    padding-bottom: 0.25rem;
}