.banner{
    background: url("") no-repeat center/100% 100%;

}
.bgc-hui{
    padding: .520833rem;
}
.bigtit{
    font-size: .1875rem;
    color: #454545;
    text-align: center;
    margin-bottom: .135417rem;
}
.titinfo{
    margin: 0  auto;
    margin-bottom: .3125rem;
    color: #454545;
    width: 3.177083rem;
    line-height: .15625rem;
    font-size: .083333rem;
    text-align: center;
}
.achibox{
    overflow: hidden;
    padding: .208333rem;
    background-color: #fff;
    
}
.achiitem{
    position: relative;
    float: left;
    width: 25%;
    height: 1.90625rem;
    margin-bottom: .208333rem;
	text-align: center;
}
.achiitem img{
    width: 1.625rem;
    height: 1.90625rem;
}
.showcheck{
    visibility: visible!important;
}
.check{
  
    visibility: hidden;
    position: absolute;
    top: 0;
    left: 50%;
	transform: translateX(-50%);
    z-index: 22;
    width: 1.625rem;
    height: 1.90625rem;
    background-color: rgba(91, 188, 209, .8);
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
.iconfont{
    margin: .052083rem;
}
.prebgc{
    display: none;
    z-index: 23;
    position: fixed;
    top: 0;
    background-color: rgba(0, 0, 0, .8);
    width: 10rem;
    height: 15rem;
}
.preimg{
    width: max-content;
    margin: 1.260417rem auto 0;
    background-color: #fff;
}


@media screen and (max-width: 768px) {
    .bigtit{
        font-size: 16px;
    }
    .titinfo{
        width: 100%;
        line-height:20px;
        font-size: 12px;
        text-align: center;
    }
    .preimg{
        width: 9rem;
        height: 4rem;
        margin:2rem auto;
        background-color: #fff;
    }
    .preimg img{
        height: auto;
    }
  }