.nav a span{
    display: block;
    text-decoration: none;
    color: #6d0921;
    height: 0.35rem;
    line-height: 0.35rem;
    padding: 0 0 0.5rem 0;
    font-size: 0.22rem;}
.p_nav {
    
    position: absolute;
    width: 100%;
    height: 100vh;
    overflow-y: scroll;
    left: 0;
    top:0;
    z-index: 999;}
.p_nav_itme section a {
    display: block;
    text-decoration: none;
    width: 100%;
    border-bottom: 1px solid #ddd;
    color: #fff;
    font-size: 0.26rem;
    height: 0.8rem;
    line-height: 0.8rem;
    padding: 0 0 0 10%;
    box-sizing: border-box;}
.p_unfold {
    display: block;}
.p_shrink {
    display: none;}
.p_nav_itme div {
    width: 100%;
    padding: 0rem 5%;
    box-sizing: border-box;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #ddd;}
.p_nav_itme div a {
    flex-grow: 1;
    text-decoration: none;
    color: #fff;
    font-size: 0.26rem;
    height: 0.8rem;
    line-height: 0.8rem;}
.p_nav_itme div span {
    flex-shrink: 0;
    font-size: 0.26rem;
    width: 1rem;
    text-align: center;
    height: 0.8rem;
    line-height: 0.8rem;
    cursor: pointer;
    color:#fff;}
.p_nav_itme section {
    width: 100%;
    height: 0;
    overflow: hidden;
    transition: all 0.2s linear;}