* {
    margin: 0;
    padding: 0;
    list-style: none;
}

.wrapper3840 {
    position: relative;
    z-index: 0;
    width: 38.4rem;
    height: 21.6rem;
    background-image: url(../img/背景.png);
    background-size: 100% auto;
}


/* 头部 */

.header {
    height: 2.5rem;
    padding: 0 .8rem;
}

.logo {
    width: 1.7rem;
    height: 1.7rem;
    background-image: url(../img/logo.png);
    background-size: 1.7rem;
    position: absolute;
    left: 1.3rem;
    top: 0.75rem;
}


/* 头部 */

.fenlei {
    width: 3.32rem;
    height: 1.34rem;
    background: #FFFFFF;
    box-shadow: 0 0.03rem 0 0.01rem rgba(0, 0, 0, 0.15);
    position: absolute;
    top: 0.7rem;
    right: 6.91rem;
    border-radius: 0.5rem;
    margin: 0 auto;
}

.fenlei div {
    width: 3.14rem;
    height: 1.21rem;
    background-color: #FFECBC;
    border-radius: 0.5rem;
    z-index: 2;
    position: absolute;
    top: 0.05rem;
    right: 0.1rem;
    font-size: 0.58rem;
    font-family: PingFangSC;
    color: #BD7109;
    text-align: center;
    line-height: 1.21rem;
    font-weight: 600;
    box-shadow: 0 0.03rem 0.05rem 0 rgba(255, 102, 0, 0.5), 0px -0.03rem 0.03rem 0.01rem #FEBF2B;
}

.diqu {
    width: 3.72rem;
    height: 1.52rem;
    background: #FFFFFF;
    box-shadow: 0 0.03rem 0 0.01rem rgba(0, 0, 0, 0.15);
    position: absolute;
    top: 0.57rem;
    right: 2.8rem;
    border-radius: 0.5rem;
    margin: 0 auto;
}

.diqu div {
    width: 3.52rem;
    height: 1.37rem;
    background-color: #FFAE00;
    border-radius: 0.5rem;
    z-index: 2;
    position: absolute;
    top: 0.1rem;
    right: 0.12rem;
    font-size: 0.64rem;
    font-family: PingFangSC;
    color: #FFFFFF;
    text-align: center;
    line-height: 1.21rem;
    font-weight: 600;
    box-shadow: 0 0.03rem 0.05rem 0 rgba(255, 102, 0, 0.5), 0px -0.03rem 0.03rem 0.01rem #FF6600;
}


/* 目录 */

.mulu {
    width: 36.22rem;
    height: 17.97rem;
    margin: 0 auto;
}

.mulu .neirong {
    width: 33rem;
    height: 13rem;
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    margin: 0 auto;
    padding-top: 2rem;
}

.mulu .neirong div {
    width: 7.9rem;
    height: 5rem;
}

.mulu .neirong .biankuang {
    width: 7.9rem;
    height: 5.73rem;
    background: #DBEEFF;
    border: 0.1rem solid #FFFFFF;
    box-shadow: 0 0.08rem 0.4rem 0 rgba(33, 128, 255, 0.63), 0 -0.01rem 0.07rem 0.02rem rgba(88, 181, 255, 0.18);
    border-radius: 0.8rem;
}

.neirong .biankuang .tupian {
    width: 7.5rem;
    height: 4.8rem;
    margin: 0 auto;
    padding-top: 0.2rem;
    position: relative;
}

.neirong .biankuang .tupian .img {
    width: 7.5rem;
    height: 4.8rem;
    border-radius: 0.8rem;
}

.neirong .biankuang .tupian .bofang {
    width: 0.64rem;
    height: 0.5rem;
    background-image: url(../img/播放.png);
    background-size: 100%;
    position: absolute;
    left: 0.54rem;
    top: 0.48rem;
}

.neirong .biankuang .tupian .yanjing {
    width: 0.92rem;
    height: 0.3rem;
    font-size: 0.41rem;
    font-family: Alibaba;
    font-weight: normal;
    color: #FFFFFF;
    position: absolute;
    right: 0.6rem;
    top: 4rem;
}

.neirong .biankuang .tupian .yanjing1 {
    width: 0.4rem;
    height: 0.24rem;
    position: absolute;
    right: 1.6rem;
    top: 4.2rem;
}

.neirong .biankuang .biaoti {
    font-size: 0.4rem;
    font-family: PingFangSC;
    color: #012ACB;
    line-height: 0.5rem;
    padding-left: 0.7rem;
    font-weight: bold;
}

 

/* 目录 */

.fanhui {
    width: 3.46rem;
    height: 1.46rem;
    background-image: url(../img/返回.png);
    background-size: 100%;
    position: absolute;
    right: 0.66rem;
    bottom: 0.96rem;
}

.footer {
    position: absolute;
    z-index: 1;
    bottom: 0;
    left: 0;
    width: 100%;
    height: .6rem;
    line-height: .6rem;
    text-align: center;
    background: rgba(0, 0, 0, .1);
    font-size: .28rem;
    color: #582e0d
}


/* 弹窗 */

.tanchuang {
    width: 38.4rem;
    height: 21.6rem;
    background: rgba(0, 0, 0, 0.5);
    z-index: 5;
    position: absolute;
    left: 0;
    top: 0;
}

.tanchuang .erweima {
    width: 3.86rem;
    height: 4.53rem;
    position: absolute;
    right: 11.5rem;
    bottom: 1.97rem;
    z-index: 3;
}

.tanchuang .guanbi {
    width: 1.1rem;
    height: 1.3rem;
    position: absolute;
    left: 23rem;
    top: 2.5rem;
}

.tanchuang .nierong {
    width: 10.66rem;
    height: 17.50rem;
    position: absolute;
    left: 13.86rem;
    bottom: 1.74rem;
}


/* 弹窗 */