/*爱租车箭头head*/
.roundBack {
    position: fixed;
    top: 15px;
    z-index: 1;
    width: 40px;
    height: 30px;
    line-height: 30px;
    text-align: center;
    background-color: rgba(0, 0, 0, .35);
    border-radius: 0 30px 30px 0;
    font-family: arrow;
    -webkit-user-select: none;
    -webkit-font-smoothing: antialiased;
}

.roundBack:before {
    content: "";
    display: block;
    width: 12px;
    height: 12px;
    border-left: #fff 2px solid;
    border-bottom: #fff 2px solid;
    box-sizing: border-box;
    -webkit-box-sizing: border-box;
    transform: rotate(45deg);
    -webkit-transform: rotate(45deg);
    position: absolute;
    top: 9px;
    left: 8px;
}

.roundBack:after {
    content: "";
    display: block;
    width: 18px;
    height: 2px;
    background: #fff;
    position: absolute;
    top: 14px;
    left: 8px;
    border-radius: 2px;
}