.fade-bg{
    position: fixed;
    right: 0;
    bottom: 0;
    border-radius: 50vh 0 0 0;
    background-color: rgba(0,0,0,0.7);
    transition: all 0.4s;
    width: 0;
    height: 0;
    /*transform: translate(50vh,50vh);*/
}
.fade-bg.active{
    width: 100vh;
    height: 100vh;
}
.doc{
    display: none;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    z-index: 100;
    padding-bottom: 1rem;
    max-width: 750px;
    color: #fff;
    font-size: .24rem;
    background-color: #212737;
    overflow-y: auto;
}
.main-wrap {
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
    margin: 0 auto;
    min-height: 100vh;
    box-sizing: border-box;
}
.main-wrap.doc{

}


.doc .doc-title{
    text-align: center;
    padding: 0.45rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
}
.doc .fix-close{
    position: fixed;
    right: 0.35rem;
    top: 0.32rem;
    width: 0.66rem;
    height: 0.66rem;
}
/*.doc .doc-title:before,.doc .doc-title:after{*/
/*    content: "";*/
/*    display: inline-block;*/
/*    flex: 1;*/
/*    height: 1px;*/
/*    background-color: #fef333;*/
/*}*/

.doc .doc-title img{
    height: 0.43rem;
    margin: 0 0.21rem;
}
.doc .main-content{
    padding: 0 0.68rem;
}
.doc .main-content .question{
    width: 100%;
    background-color: rgba(0,0,0,0.42);
    border-radius: 0.35rem;
    padding: 0.18rem 0;
    text-align: center;
    margin-bottom: 0.25rem;
}
.doc .main-content .question img{
    height: 0.38rem;
}
.doc .main-content .tip{
    width: 100%;
    font-size: 0.34rem;
    margin-bottom: 0.25rem;
}
.doc .main-content .icon{
    width: 0.64rem;
}

.doc-steps{

}
.doc-steps .step-text{
    font-size: 0.28rem;
    margin-bottom: 0.25rem;
    margin-top: 0.08rem;
}
.doc-steps .step-text .icon{
    width: 0.64rem;
    vertical-align: text-top;
}
.doc-steps .step-img{
    margin-bottom: 0.36rem;
}
.doc-steps .step-img img{
    width: 100%;
    border-radius: 0.32rem;
}