*{
    margin: 0;
    padding: 0;
}
body{
    font-size: 14px;
    font-family: '微软雅黑';
}
header{
    width: 100%;
    height: 84px;
    margin: 0px auto;
    background: rgba(97, 97, 97, 0.2);
    box-sizing: border-box;
    backdrop-filter: blur(8px);
}
.container{
    width: 1200px;
    margin: 0px auto;
}
.backBtn{
    margin-top: 30px;
}
.centerAlign {
    text-align: center;
}
.textindent {
    text-indent: 2em;
}