.main {
    height: 100%;
    position: relative;
    display: flex;
    justify-content: space-between;
}

.main-left,
.main-right {
    width: 550px;
    position: relative;
    height: 100%;
}

.main-left span {
    position: absolute;
    left: 0;
    bottom: 0;
    display: inline-block;
    height: 583px;
    width: 220px;
    background-image: url('../assets/img/role1.png');
    background-size: cover;
    background-repeat: no-repeat;
}

.main-right span {
    position: absolute;
    right: 0;
    bottom: -15px;
    display: inline-block;
    height: 570px;
    width: 240px;
    background-image: url('../assets/img/role2.png');
    background-size: cover;
    background-repeat: no-repeat;
}

.main-center {
    flex: 1;
    height: 100%;
}

.main-center .introduc-A {
    width: 320px;
    height: 50px;
    margin: 20px 0;
    background-image: url('../assets/img/title-text.png');
    background-size: cover;
    background-repeat: no-repeat;
}

.main-center .introduc-B {
    width: 640px;
    height: 100px;
    margin: 15px 0;
    background-image: url('../assets/img/describe-text.png');
    background-size: cover;
    background-repeat: no-repeat;
}

.download-method {
    margin-top: 150px;
    display: flex;
}

.download-method .download-left {
    height: 180px;
    margin-right: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.download-left .download-item {
    cursor: pointer;
    display: flex;
    align-items: center;
    width: 205px;
    height: 80px;
    background: #4b4b4b;
    border-radius: 6px;
    text-decoration: none
}

.download-item.apple {
    background: #4b4b4b;
}

.download-item.android {
    background: #457a76;
}

.download-item .left {
    display: flex;
    justify-content: center;
    width: 80px;
}

.download-item .right {
    color: #fff;
    font-size: 15px;
}

.apple .left .apple-logo {
    display: inline-block;
    width: 29px;
    height: 36px;
    background-image: url('../assets/img/apple-logo.png');
    background-size: cover;
    background-repeat: no-repeat;
}

.android .left .android-logo {
    display: inline-block;
    width: 35px;
    height: 38px;
    background-image: url('../assets/img/android-logo.png');
    background-size: cover;
    background-repeat: no-repeat;
}

.download-method .download-right .QR_code {
    width: 180px;
    height: 180px;
    background-image: url('../assets/img/qr_code.png');
    background-size: cover;
    background-repeat: no-repeat;
    text-align: center;
    display: table-cell;
    vertical-align: bottom;
    border-radius: 6px;
}

.download-method .download-right span {
    font-size: 12px;
}