* {
    box-sizing: border-box;
}
html,body {
    padding: 0;
    margin: 0;
    width: 100%;
    height: 100%;
}
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 13% 0 6.25%;
    width: 100%;
    height: 72px;
    background: rgba(0, 0, 0, 0.2);
    /* opacity: 0.2; */
}
.log {
    display: flex;
    align-items: center;
}
.log img {
    height: 48px; 
    width: 48px;
    display: inline-block;
    /* vertical-align: middle; */
}
.log .tit {
    font-size: 20px;
    font-family: AlibabaPuHuiTi-Bold, AlibabaPuHuiTi;
    font-weight: bold;
    color: #FFFFFF;
    line-height: 27px;
    margin-left: 20px;
}
.menu {
    display: flex;
}
.menu a{
    padding: 10px 20px;
    margin: 1.5625%;
    font-size: 20px;
    font-family: AlibabaPuHuiTi-Regular, AlibabaPuHuiTi;
    line-height: 1;
    font-weight: 400;
    color: #FFFFFF;
    text-decoration: none;
    white-space: nowrap;
    opacity: 0.8;
}
.menu a:hover {
    opacity:1;
}
.menu a.active {
    opacity:1;
}
footer {
    text-align: center;
    font-size: 20px;
    font-family: PingFangSC-Light, PingFang SC;
    font-weight: 300;
    color: #BEBEBE;
    line-height: 28px;
    padding: 22px 0;
    background: #F7F7F7;
}
main {
    min-height:calc(100% - 100px) ;
}