body {
    min-width: 320px;
    max-width: 750px;
    /* flexible 给我们划分了 10 等份 */
    width: 10rem;
    margin: 0 auto!important;
    font-family: Arial, Helvetica;
    background-color: #FFF5F5;
    /* background: url(../img/bg.png) no-repeat;
    position: fixed; */
    background: #CDEDF8;
}

@media screen and (min-width: 750px) {
    html {
        font-size: 75px!important;
    }
}

.bg {
    width: 10rem;
    height: 33.52rem;
    background: url(../images/banner.png) no-repeat;
    background-size: 100%;
    position: relative;
}

.header {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 10rem;
    height: 1.9467rem;
    background: url(../images/top.png) no-repeat;
    background-size: 100%;
    z-index: 9;
}

.btn {
    position: absolute;
    top: 12.4rem;
    left: 50%;
    transform: translateX(-50%);
    width: 2.8267rem;
    height: 2.8267rem;
    background: url(../images/btn.png) no-repeat;
    background-size: 100%;
}

.welfare {
    position: absolute;
    top: 15.6rem;
    left: 50%;
    transform: translateX(-50%);
    width: 9.0667rem;
    height: 5.4rem;
    background: url(../images/welfare.png) no-repeat;
    background-size: 100%;
}

.title_01 {
    position: absolute;
    bottom: 10rem;
    left: 50%;
    transform: translateX(-50%);
    width: 7.4267rem;
    height: .9067rem;
    background: url(../images/tit.png) no-repeat;
    background-size: 100%;
}

.download_box {
    position: fixed;
    width: 4rem;
    height: .866667rem;
    top: .306667rem;
    right: .4rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: #FFFBC7;
    font-size: .346667rem;
    line-height: .906667rem;
    text-align: center;
    font-weight: 500;
}

.play_btn {
    width: 1.733333rem;
    height: .866667rem;
    background-color: #F77E2D;
    border-radius: .133333rem;
}

.down_btn {
    width: 2.106667rem;
    height: .866667rem;
    background-color: #F77E2D;
    border-radius: .133333rem;
}

.border {
    margin: .8rem auto;
    width: 8.96rem;
    height: 4.373333rem;
}

.footer {
    position: absolute;
    bottom: 0;
    width: 10rem;
    height: 1.9467rem;
    background: url(../images/top.png) no-repeat;
    background-size: 100%;
}

.footer_download_box {
    position: absolute;
    width: 4rem;
    height: .866667rem;
    top: 50%;
    transform: translateY(-50%);
    right: .4rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: #FFFBC7;
    font-size: .346667rem;
    line-height: .906667rem;
    text-align: center;
    font-weight: 500;
}

.swiper_box {
    position: absolute;
    bottom: 2rem;
}

.lbt-box {
    position: relative;
    width: 10rem;
    height: 8rem;
    margin: 0 auto;
    overflow: hidden;
}

.imgs {
    width: 100%;
    height: 100%;
    perspective: 6.666667rem;
}

.imgitem {
    position: absolute;
    width: 4.866667rem;
    height: 7.093333rem;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    z-index: 0;
    transition: .8s;
    opacity: 0;
}

.imgitem img {
    width: 100%;
    height: 100%;
}

.cur-img {
    width: 4.866667rem;
    z-index: 100;
    opacity: 1;
}

.pre-img {
    transform: translateX(-5.333333rem) rotateY(30deg) scale(0.8);
    z-index: 9;
    opacity: 0.9;
}

.next-img {
    transform: translateX(5.333333rem) rotateY(-30deg) scale(0.8);
    z-index: 9;
    opacity: 0.9;
}

#pre {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    left: .266667rem;
    width: .56rem;
    height: 1.08rem;
    background: url(../images/icon_left.png) no-repeat;
    background-size: 100%;
    z-index: 100;
}

#next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    right: .266667rem;
    width: .56rem;
    height: 1.08rem;
    background: url(../images/icon_right.png) no-repeat;
    background-size: 100%;
    z-index: 100;
}

.mask {
    position: fixed;
    width: 10rem;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 999;
}

.mask img {
    display: block;
    width: 10rem;
}