.w {
    width: 1200px;
    margin: 0 auto;
   
}

footer {
 
    height: 0px;
 
}

footer .w {
    display: flex;
}

footer .w .left {
    width: 460px;
    margin-right: 200px;

}

footer .w .left dd {
    margin: 36px 0;
}

footer .w .right {
    flex: 1;
    display: flex;
    flex-wrap: wrap;

}

footer .w .right dl {
    width: 179px;

}

footer .w .right dl:last-child {
    width: 300px;
}

footer .w .time {
    margin-left: 10px;
}

footer .w dl dt {
    font-size: 18px;
    font-family: PingFangSC-Medium, PingFang SC;
    font-weight: 500;
    color: #ffffff;
    margin-bottom: 20px;
}

footer .w dl dd {
    margin: 15px 0;
    font-size: 14px;
    font-family: PingFangSC-Regular, PingFang SC;
    font-weight: 400;
    color: #ffffff;
    line-height: 26px;

}

footer a {
    color: #ffffff;
}

.icon {
    width: 35px;
    height: 35px;

}

.zhihu-icon {
    background-image: url("../../assets/images/zhihu.svg");
    background-size: 100% 100%;
    transition: all 0.2s;
    border-radius: 50%;
    overflow: hidden;


}

.zhihu-icon:hover {
    background-color: #fff;
    background-image: url("../../assets/images/zhihu-hover.svg");
    transform: scale(1.1);
}


.md-main{
    min-height: 95vh;
}