.pc_header.white .nav li:nth-child(3) > a{color: black}
.pc_header.white .nav li:nth-child(5) > a{color: #ff5a00}
.h-btn-div .btn-back-div{color: black;font-size: 26px;font-weight: bold}
.bg_1 .ul-div{width: 785px}
.class-con{margin-bottom: 100px}

.m-btn-div .m-btn {width: 145px;background-color: white;color: black;font-size: 30px}
.m-btn-div .m-btn .btn-img-div{display: none}
.m-btn-div .m-btn.active .btn-img-div{display: block;margin-left: 5px}
.m-btn-div .m-btn.active{color: #ff5a00}

.bg-4-c-m{text-align: left;}
.class-con .bg-4m-t1{font-size: 20px;color: #626262;font-weight: bold;margin-bottom: 5px;margin-top: 20px;margin-left: 35px}
.class-con .bg-4m-t2,.class-con .bg-4m-t3{margin-bottom: 10px;font-size: 14px;color: #676767;margin-top: 5px;line-height: 25px;display: -webkit-box;-webkit-box-orient: vertical;-webkit-line-clamp: 2;overflow: hidden;}
.class-con .bg-4m-t2{height: 45px;padding: 0px 35px}
.class-con .bg-4m-t3{text-align: right;margin-right: 30px;margin-top: 0px}
.bg_1 .ul-div ul li>a{width: 175px}
.bg_1 .footer-nav  ul li>a{color:#ffffff}


@media (max-width: 750px) {
    .m-btn-div{width: 85%}
    .m-btn-div .m-btn{font-size: 32px;width: 155px;}
    .class-con .bg-4m-t1 {
        margin: 10px auto 10px;
    }
    .class-con{margin-bottom: 0px}
    .class-con .bg-4-c{flex-direction: row;flex-wrap: wrap;justify-content: space-between;}
    .class-con .bg-4-c .bg-4-c-m{width: 373px}
    .class-con .bg-4m-img{height: 205px;background-color: #333333}
    .class-con .bg-4-c-m{height: 370px;margin: 0px;overflow: hidden}
    .class-con .bg-4m-t1{font-size: 24px;height: 35px;overflow: hidden;color: #a5a5a5;line-height: 35px;padding: 0px 5px}
    .class-con .bg-4m-t2{font-size: 20px;
        height: 60px;
        overflow: hidden;
        text-overflow: ellipsis;
        -webkit-line-clamp: 2;
        display: -webkit-box;
        -webkit-box-orient: vertical;
        text-align: left;
        color: #a5a5a5;
        margin: 0 0 10px 0px;
        padding: 0px 5px;
        line-height: 30px;
        letter-spacing: 1px;
    }
    .class-con .bg-4m-t3{font-size: 20px;height: 48px;overflow: hidden;}
    .class-con .bg-4m-t3{margin-top:0px;}
}