#app{
    width: 100%;
    height: 100%;
}
.retrun{
    display: flex;
    width: 100%;
    height: 3rem;
    background-color: #c50011;
}
.retrun a{
    font-size: 1rem;
    line-height: 3rem;
    color:#fff;
    margin-left: 0.9rem;
}
.retrun .title{
    width: calc(100% - 7rem);
    text-align: center;
    color:#fff;
    line-height: 3rem;
}
.vid{
    width: 20rem;
    margin:0 auto 0;
}
.txt_list{
    width: 90%;
    margin: 0 auto 0;
    margin-top: 1.25rem;
}