.wtx_nav {
position: fixed;
bottom: 0;
left: 0;
right: 0;
z-index: 2;
background: #fff;
border-top: 1px solid rgba(0, 0, 0, 0);
display: flex;
margin-top: 40rpx;
padding-bottom:5rpx;
}
.wtx_nav_item {
flex: 1;
text-align: center;
font-size: 24rpx;
line-height: 1;
padding: 5rpx 0 10rpx;
color: #afb2bc;
}
.wtx_nav_item .iconfont {
height: 22px;
width: 20px;
display: block;
margin: auto;
}
导航栏的层级是最高的,你可以给列表主体部分加个padding-bottom