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

.wrapper {
    width: 100%;
    height: auto;
    overflow: hidden !important;

}

.bg {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    z-index: -1;
}

.wrapper .main_content {
    width: 50%;
    margin: 0 auto;

}

.main_top {
    width: 100%;
    height: auto;
    padding: 90px 0 50px;
    box-sizing: border-box;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-content: center;
    text-align: center;
}

.main_top .top_l,
.main_top .top_r {
    flex: 1 1 auto;
}

.main_top .top_l .logo {
    width: 120px;
    height: auto;
    margin-bottom: 36px;
}

.main_top .top_l span {
    color: rgba(255, 255, 255, .8);
    font-size: 14px;
    margin: 5px 8px;
}

.main_top .top_r {
    color: #c0bed4;
    font-size: 14px;
    line-height: 1.5;

}

.main_top .top_r .tit_text {
    height: 72px;
}

.main_top .top_r h5 {
    font-size: 30px;
    font-weight: normal;
    color: #fff;
    line-height: 1.6;
    text-shadow: 2px 3px 1px rgba(255, 255, 255, .4);
}

.main_top .top_r p {
    color: rgba(255, 255, 255, .5);
    font-size: 14px;
    text-align: center;
    margin: 40px 0 10px;
}

.main_top .desc span {
    margin: 2px 10px;
}


.qrcode {
    width: 130px;
    height: 130px;
}

.btm_main {
    width: 100%;
    padding-top: 150px;
    box-sizing: border-box;
}


.btn_group {
    width: 80%;
    height: auto;
    margin: 0 auto;
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    align-items: flex-start;
    align-content: center;
}

.btn_group li {
    flex: 1 1 auto;
    width: 50%;
    height: auto;
    margin-bottom: 40px;
}

.btn_group li button {
    margin: 0 auto;
    display: block;
    width: 80%;
    height: 72px;
    background: #917cfd;
    box-shadow: 6px 6px #e6dfff;
    border-radius: 6px;
    border: 0;
    color: #fff;
    font-size: 22px;
    text-align: center;
    cursor: pointer;
    transition: .2s;
}

.btn_group li button:hover {
    box-shadow: none;
}

.btn_group li button::before {
    content: '';
    display: inline-block;
    width: 32px;
    height: 32px;
    background: url(../image/ios.png) no-repeat center;
    background-size: contain;
    vertical-align: middle;
    margin-right: 26px;
}

.btn_group li button.android::before {
    background: url(../image/android.png) no-repeat center;
    background-size: contain;
}

.btn_group li button.pc::before {
    background: url(../image/Pc.png) no-repeat center;
    background-size: contain;
}

.btn_group li button.h5::before {
    background: url(../image/H5.png) no-repeat center;
    background-size: contain;
}



@media screen and (min-width: 992px) and (max-width:1199px) {

    .wrapper .main_content {
        width: 70%;
        margin: 0 auto;
    }

    .main_top {
        padding: 5.5rem 0 3rem;
        box-sizing: border-box;
    }

    .main_top .top_l .logo {
        width: 7rem;
        margin-bottom: 1.8rem;
    }

    .main_top .top_l span {
        font-size: 0.8rem;
        margin: 0.3rem 0.5rem;
    }

    .main_top .top_r .tit_text {
        height: 4.2rem;
    }

    .main_top .top_r h5 {
        font-size: 1.7rem;

    }

    .main_top .top_r p {
        font-size: .8rem;
        margin: 2.2rem 0 0.8rem;
    }



    .qrcode {
        width: 8rem;
        height: 8rem;
    }

    .btm_main {
        padding-top: 9rem;
        box-sizing: border-box;
    }

    .btn_group {
        width: 100%;
    }

    .btn_group li {

        margin-bottom: 2.2rem;
    }

    .btn_group li button {
        margin: 0 auto;
        height: 4rem;
        background: #917cfd;
        box-shadow: 0.4rem .4rem #e6dfff;
        border-radius: 0.3rem;
        font-size: 1.5rem;
    }

    .btn_group li button::before {
        content: "";
        display: inline-block;
        width: 1.6rem;
        height: 1.6rem;

    }
}

@media screen and (min-width:767px) and (max-width:960px) {
    html {
        font-size: 14px !important;
    }

    .wrapper .main_content {
        width: 80%;
        margin: 0 auto;
    }
    .main_top .top_l .logo {
        width: 6.5rem;
        margin-bottom: 1.5rem;
    }
    .main_top .top_l span {
        font-size: 0.9rem;
        margin: 0.3rem 0.5rem;
    }
    .main_top .top_r .tit_text {
        height: 4.5rem;
    }

    .main_top .top_r h5 {
        font-size: 1.6rem;
    }

    .main_top .top_r p {
        font-size: 1rem;
        margin: 3.2rem 0 1rem;
    }
    .btn_group {
        width: 100%;
    }
    .qrcode {
        width: 9rem;
        height: 9rem;
    }

    .btm_main {
        padding-top: 9rem;
        box-sizing: border-box;
    }
    .btn_group li {
        margin-bottom: 2.2rem;
    }

    .btn_group li button {
        margin: 0 auto;
        height: 4rem;
        background: #917cfd;
        box-shadow: 0.4rem .4rem #e6dfff;
        border-radius: 0.3rem;
        font-size: 1.2rem;
    }

    .btn_group li button::before {
        content: "";
        display: inline-block;
        width: 1.6rem;
        height: 1.6rem;

    }
}

@media screen and (min-width:640px) and (max-width: 766px) {
    html {
        font-size: 150% !important;
    }

    .wrapper .main_content {
        width: 90%;
        margin: 0 auto;
    }

    .main_top {
        padding: 3.5rem 0 1rem;
        box-sizing: border-box;
    }

    .main_top .top_l .logo {
        width: 5rem;
        height: auto;
        margin-bottom: 1.5rem;
    }

    .main_top .top_l span {
        font-size: 0.5rem;
        margin: 0.3rem 0rem;
    }

    .main_top .top_r .tit_text {
        height: 2.6rem;
    }

    .main_top .top_r h5 {
        font-size: 1rem;

    }

    .main_top .top_r p {
        font-size: .6rem;
        margin: 1.8rem 0 0.8rem;
    }

    .qrcode {
        width: 5.5rem;
        height: 5.5rem;
    }

    .btm_main {
        padding-top: 6rem;
        box-sizing: border-box;
    }

    .btn_group {
        width: 100%;
    }

    .btn_group li {
        margin-bottom: 2rem;
    }

    .btn_group li button {
        margin: 0 auto;
        height: 2.6rem;
        background: #917cfd;
        box-shadow: 0.2rem 0.2rem #e6dfff;
        border-radius: 0.3rem;
        font-size: 0.8rem;
    }

    .btn_group li button::before {
        content: "";
        display: inline-block;
        width: 1.2rem;
        height: 1.2rem;

    }
}

@media screen and (min-width:375px) and (max-width : 480px) {
    html {
        font-size: 10px !important;

    }
    .wrapper .main_content {
        width: 100%;
    }
    .main_top {
        flex-direction: column;

        padding: 6rem 0 0rem;
        box-sizing: border-box;
    }

    .main_top .top_l .logo {
        width:8rem;
        height: auto;
        margin-bottom: 0.5rem;
    }

    .main_top .top_l span {
        font-size: 1.5rem;
        margin: 0.3rem 0rem;
    }

    .main_top .top_r .tit_text {
        height: 4.5rem;
        margin-top: 2rem;
    }

    .main_top .top_r h5 {
        font-size: 1.8rem;
        text-shadow: .5rem 0.5rem .2rem rgba(134, 110, 255, .6);

    }

    .main_top .top_r p {
        font-size: 1.5rem;
        margin: 2.2rem 0 1.5rem;
    }

    .qrcode {
        width: 11rem;
        height:11rem;
    }
    .btm_main{
        padding: 7rem 0 0;
        box-sizing: border-box;
    }

    .btn_group {
        width: 100%;
    }

    .btn_group li {
        margin-bottom: 2rem;
    }

    .btn_group li button {
        margin: 0 auto;
        height: 4rem;
        background: #917cfd;
        box-shadow: 0.3rem 0.3rem #e6dfff;
        border-radius: 0.3rem;
        font-size: 1.5rem;
    }

    .btn_group li button::before {
        content: "";
        display: inline-block;
        width: 1.6rem;
        height: 1.6rem;
    }
}

@media screen and (min-width:320px) and (max-width:374px) {
    html {
        font-size: 5px !important;
    }
    .wrapper .main_content {
        width: 100%;
    }
    .bg{
        height: 100%;
    }
    .main_top {
        flex-direction: column;
        padding: 19rem 0 3rem;
        box-sizing: border-box;
    }

    .main_top .top_l .logo {
        width: 17rem;
        height: auto;
        margin-bottom: 1rem;
    }

    .main_top .top_l span {
        font-size: 2.1rem;
        margin: 4rem 0rem;
    }

    .main_top .top_r .tit_text {
        height: 9rem;
        margin-top: 5rem;
    }

    .main_top .top_r h5 {
        font-size:3.6rem;
        text-shadow: .5rem 0.5rem .2rem rgba(134, 110, 255, .6);
    }

    .main_top .top_r p {
        font-size: 2rem;
        margin: 4rem 0 2rem;
    }

    .qrcode {
        width: 20rem;
        height: 20rem;
    }

    .btm_main {
        padding: 6rem 0 0;
        box-sizing: border-box;
    }

    .btn_group {
        width: 100%;
    }

    .btn_group li {
        margin-bottom: 2rem;
    }

    .btn_group li button {
        margin: 0.8rem auto;
        height: 8rem;
        background: #917cfd;
        box-shadow: 0.5rem 0.5rem #e6dfff;
        border-radius: 0.5rem;
        font-size: 2.1rem;
    }

    .btn_group li button::before {
        content: "";
        display: inline-block;
        width: 3rem;
        height: 3rem;
    }
}