.leftMenu a {
    text-decoration: none; font-size: 16px;
    display: block;
}
.btnnn{  display: inline-block;
    width:1.24rem;
    height: 1.24rem; color: #fff;
    border-radius:1rem;
    line-height: 0.40rem;
    text-align: center;
    box-sizing: border-box;
    font-size: 0.28rem; font-weight: 900; background: #4184ff;}
.wsc-main{ position: relative; z-index:1;}
.leftMenu {
    background: #ffffff;
    left: -1000px;
    position: fixed;
    top: 50px;
    display: block;
    height: 100%;
    width: 68%;
    min-width: 140px;
    max-width: 440px;
    z-index: 90002;
    transition: all 0.4s ease;
    -moz-transition: all 0.4s ease;
    -webkit-transition: all 0.4s ease;
    -o-transition: all 0.4s ease;
    overflow: auto;
}

.leftMenu.menu-open {
    left: 0;
}

.leftMenu ul {
    list-style: none;
    padding: 0;
    overflow: hidden;
}

.leftMenu ul li {
    position: relative;
    padding: 10px 0 10px 20px;
    overflow:hidden;
}
   
.leftMenu ul li.hasChild > a:after {
    content: "+"; color: #0066ff;
    position: absolute;
    right: 20px;
    top:10px;
    font-size: 22px;
    font-weight: 300;
}

.leftMenu ul li.hasChild.open > a:after {
    content: "-";
    right: 23px;
    font-size: 28px;
    top: -3px;
}

.f2, .f3 {
    height: 0;
    padding-left: 20px;
    overflow: hidden;
    position: relative;
    transition: height 0.4s ease;
    -moz-transition: height 0.4s ease;
    -webkit-transition: height 0.4s ease;
    -o-transition: height 0.4s ease;
}

.menu-dark-backdrop {
    background: rgba(0,0,0,0);
    transition: all 0.4s ease;
    -moz-transition: all 0.4s ease;
    -webkit-transition: all 0.4s ease;
    -o-transition: all 0.4s ease;
    width: 100%;
    position: fixed;
    top: 50px;
    left: 0;
    right: 0;
    bottom:0; display: none;
    overflow: hidden;
}

    .menu-dark-backdrop.in { display: block;
        height: 100%; 
        z-index: 3;
        background: rgba(0,0,0,0.5);
    }<!--0.00032782554626465-->