*{
    margin: 0;
    padding: 0;
    moz-user-select: -moz-none;
    -moz-user-select: none;
    -o-user-select: none;
    -khtml-user-select: none;
    -webkit-user-select: none;
    -ms-user-select: none;
    user-select: none;
}
img{
    display: block;
    border: 0;
}
html,body{
    background:rgba(246,247,250,1);
}
.header{
    height: 50px;
    width: 100%;
    background: #fff;
    display: flex;
}
.header .back{
    width: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.header .back img{
    width: 12px;
}
.header .menu{
    width: 50px;
}
.header .title{
    flex-grow: 1;
    font-size: 17px;
    color: #212430;
    display: flex;
    align-items: center;
    justify-content: center;
}
a{
    color: #212430;
    text-decoration: none;
}
.loading_div {
    margin-bottom: 2rem;
    height: 15px;
    text-align: center;
    margin-top: 0.5rem;
}
.loading_div a {
    font-size: 12px;
    color: #4a4a4a;
}
.quesheng-img{
    text-align: center;
    margin-top: 2rem;
}
.quesheng-img img{
    margin: auto;
}
.quesheng-p{
    color: #b0aeae;
    margin-top: 1rem;
    text-align: center;
    font-size: 12px;
}