.tishikuang{
    opacity: 0.9;
    font-size: 4.5vw;
    font-weight: 650;
    background: #fff;
    box-shadow: 0px 0px 2vw #b5b5b5;
    text-align: center;
    width: 50%;
    margin: auto;
    padding-top: 2vw;
    padding-bottom: 2vw;
    left: 0;
    top: 70%;
    position: fixed;
    border-radius: 2vw;
    right: 0;
	display:none;
	letter-spacing : 0.5pt;
}