body {
    max-width: 12rem;
}

.installNotes {
    height: 6.16rem;
    background: url(../images/installnotes.png) no-repeat center;
    background-size: 100% 100%;
    color: #4B4949;
    font-size: .26rem;
    line-height: .38rem;
    padding: 0 .73rem;
    box-sizing: border-box;
    padding-top: 5.68rem;
}

.controls {
    display: flex;
    box-sizing: border-box;
    margin-top: 1rem;
    padding-left: 18px;
}

.steps p {
    width: 1.46rem;
    height: .48rem;
    color: #fff;
    text-align: center;
    line-height: .48rem;
    background: url(../images/steps.png) no-repeat center;
    background-size: 100% 100%;
}

.line {
    width: .02rem;
    height: 1.60rem;
    background: #7C99EE;
    margin: .14rem auto;
}

.tips {
    display: flex;
    flex-direction: column;
    margin-left: .21rem;
}

.tips p {
    font-size: .26rem;
    line-height: .42rem;
    color: #333;
}

.tips a {
    width: 2.10rem;
    height: .62rem;
    text-align: center;
    line-height: .62rem;
    color: #fff;
    font-size: .32rem;
    background: rgba(81, 159, 255, 1);
    border-radius: .10rem;
    font-weight: 500;
    margin-top: .65rem;
}

.mt78 {
    margin-top: .7rem;
}

.installStepMask {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, .6);
    display: none;
}

.installStep {
    position: absolute;
    left: 0;
    bottom: 0;
    background: #fff;
    height: 5.94rem;
    width: 100%;
    padding-left: .3rem;
    box-sizing: border-box;
}

.installStep>i {
    position: absolute;
    right: .28rem;
    top: .31rem;
    width: .43rem;
    height: .42rem;
    background: url(../images/chahao.png) no-repeat center;
    background-size: 100% 100%;
}

.installStep>h3 {
    font-size: .39rem;
    font-weight: 400;
    text-align: center;
    margin-top: .31rem;
    margin-bottom: .68rem;
}

.installStep p {
    color: #373737;
    font-size: .26rem;
    font-weight: 400;
}

.installStep p>span {
    display: inline-block;
    width: .32rem;
    height: .32rem;
    background: rgba(81, 159, 255, 1);
    border-radius: 50%;
    color: #fff;
    text-align: center;
    line-height: .32rem;
    margin-right: .1rem;
}

.installStep>img {
    width: 6.26rem;
    height: 1.01rem;
    margin-top: .42rem;
}

.stepTips {
    margin-top: .11rem;
    margin-bottom: .52rem;
}

.stepTips>span {
    margin-right: .5rem;
    font-size: .22rem;
    color: #232323;
}

.tobelieve {
    display: block;
    width: 5.24rem;
    height: .80rem;
    background: rgba(81, 159, 255, 1);
    border-radius: .40rem;
    color: #fff;
    font-size: .32rem;
    text-align: center;
    line-height: .8rem;
    margin: .28rem 0 0 .85rem;
}