.tit1{
z-index: 1;
    position: absolute;
    bottom: 0;
    color: #fff;
    width: 100%;
    height: 30px;
    overflow: hidden;
    line-height: 30px;
    font-style: inherit;
    font-size: 16px;
    text-indent: 20px;
    background: rgba(0, 0, 0, 0.2);}