.backgro {
    background: url(/imgs/back.png) center no-repeat;
    height: 3520px;
    width: 100%;
    background-position: center;
    background-repeat: no-repeat;
}

body {
    margin: 0;
    font-size: 12px;
}

.myicon {
    background: url(/imgs/qrcode.png) center no-repeat;
    background-size: 134px 134px;
    left: calc(50% - 85px);
    top: 355px;
    width: 134px;
    height: 134px;
    position: absolute;
}

.androidDownload {
    background: url(/imgs/android.png) center no-repeat;
    background-size: 185px 56px;
    left: calc(50% - 517px);
    top: 394px;
    width: 185px;
    height: 56px;
    position: absolute;
    cursor: pointer;
}

.iosDownload {
    background: url(/imgs/iphone.png) center no-repeat;
    background-size: 185px 56px;
    left: calc(50% - 307px);
    top: 394px;
    width: 185px;
    height: 56px;
    position: absolute;
    cursor: pointer;
}

.mcenter {
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
}

.beleft {
    height: 623px;
    width: 50%;
    z-index: -100;
    background-color: #f8f8f8;
    position: absolute;
    top: 0;
    left: 0;
}

.beright {
    height: 623px;
    width: 50%;
    z-index: -100;
    background-color: #419aff;
    position: absolute;
    top: 0;
    left: calc(50%);
}

#footer {
    background: #f2f2f2;
    height: 80px;
    border-top: 1px solid #d1d1d1;
    color: #444;
    margin: 0 auto;
    bottom: 0;
    clear: both;
    width: 100%;
}

.container {
    padding-top: 15px;
    width: 700px;
    padding-right: 15px;
    padding-left: 15px;
    margin-right: auto;
    margin-left: auto;
}

.text-center {
    text-align: center;
}

.introimg {
    width: 1200px;
    height: 537px;
}

p {
    margin: 4px;
}

@media screen and (min-width: 1800px) {
    .introimg {
        width: 1300px;
        height: 582px;
    }
}