html,
body {
    position: relative;
    height: 100%;
    background-color: #000;
}

body {
    background-color: #000;
    font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
    font-size: 14px;
    color: #000;
    margin: 0;
    padding: 0;
}

.head {
    position: fixed;
    top: 0px;
    width: 100%;
    justify-content: space-between;
    height: 110px;
    background: linear-gradient(to bottom, #000000 0%, transparent 100%);
    z-index: 100;
}

.head-block {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
    margin: auto;
    padding: 20px 60px;
}

.logo img {

    width: 160px;
}

.title-1 {
    position: absolute;
    bottom: 30%;
    left: 50%;
    transform: translateX(-50%);
    width: 700px;
    z-index: 1;
}

/* .down-a{
    cursor: pointer;
    width: 180px;
    height: 50px;
    background-image: url('../img/down.png');
    background-size: 100% 100%;
    background-repeat: no-repeat;
}
.down-a:hover{
    background-image: url('../img/down-a.png');
    background-size: 100% 100%;
} */

.sec {
    position: relative;
    width: 100%;
    height: 100%;
    min-width: 1200px;
}

.sec .banner {
    width: 100%;
    height: 100%;
    /* 或使用vh单位 */
    background-image: url('your-image.jpg');
    background-size: cover;
    /* 或 contain */
    background-position: center;
    background-repeat: no-repeat;
}

.banner.first {
    background-image: url('../img/banner1.png');
}

.banner.third {
    background-image: url('../img/banner3.png');
}
.banner.third-a{
    background-image: url('../img/banner3-1.png');
}
.sec.s3 {
    height: 1400px;
}

.business-area {
    display: flex;
    align-items: center;
    flex-direction: column;
    height: 600px;
    width: 100%;
    background-image: url('../img/business-bg.png');
    background-size: 100% 100%;
    background-repeat: no-repeat;
    margin-bottom: 100px;
}

.business-area .title {
    width: 439px;
    height: 86px;
    background-image: url('../img/title2.png');
    background-size: 100% 100%;
    background-repeat: no-repeat;
    margin-bottom: 42px;
}

.business-area .QRcode-area .QRcode1-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px;
    box-sizing: border-box;
    height: 320px;
    width: 390px;
    background-image: url('../img/bg.png');
    background-size: 100% 100%;
    background-repeat: no-repeat;
    margin-right: 15px;
}

.business-area .QRcode-area .QRcode1 {
    height: 160px;
    width: 160px;
    margin-top: 21px;
    background-image: url('../img/QRcode1.png');
    background-size: 100% 100%;
    background-repeat: no-repeat;
}

.business-area .QRcode-area .QRcode2-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px;
    box-sizing: border-box;
    height: 320px;
    width: 390px;
    background-image: url('../img/bg.png');
    background-size: 100% 100%;
    background-repeat: no-repeat;
    margin-right: 15px;
}

.business-area .QRcode-area .QRcode2 {
    height: 160px;
    width: 160px;
    margin-top: 21px;
    background-image: url('../img/QRcode2.png');
    background-size: 100% 100%;
    background-repeat: no-repeat;
}

.business-area .QRcode-area .QRcode3-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px;
    box-sizing: border-box;
    height: 320px;
    width: 390px;
    background-image: url('../img/bg.png');
    background-size: 100% 100%;
    background-repeat: no-repeat;
}

.business-area .QRcode-area .QRcode3 {
    height: 160px;
    width: 160px;
    margin-top: 21px;
    background-image: url('../img/QRcode3.png');
    background-size: 100% 100%;
    background-repeat: no-repeat;
}

.business-area .QRcode-area .text {
    font-size: 24px;
    color: #E7E6EA;
}

.business-area .QRcode-area .text2 {
    font-size: 16px;
    color: #868A8E;
    font-weight: 500;
    margin-top: 12px;
}

.business-area .QRcode-area {
    display: flex;
    justify-content: center;
    height: 320px;
    width: 100%;
}


.down-wrap {
    position: absolute;
    bottom: 5%;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pc-down {
    width: 190px;
    height: 160px;
    margin-right: 40px;
    cursor: pointer;
    background-image: url('../img/icon2.png');
    background-size: 100% 100%;
    background-repeat: no-repeat;
}

.pc-down:hover {
    background-image: url('../img/icon2-a.png');
    background-size: 100% 100%;
}

.mac-pc-down {
    width: 190px;
    height: 160px;
    margin-right: 40px;
    cursor: pointer;
    background-image: url('../img/icon-bg.png');
    background-size: 100% 100%;
    background-repeat: no-repeat;
}

.mac-pc-down-layout {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.mac-pc-down-layout .icon3 {
    width: 130px;
    height: 60px;
    margin-left: 30px;
    cursor: pointer;
    background-image: url('../img/icon3.png');
    background-size: 100% 100%;
    background-repeat: no-repeat;
    margin-bottom: 10px;
}

.mac-pc-down-layout .icon3:hover {
    background-image: url('../img/icon3-a.png');
    background-size: 100% 100%;
}

.mac-pc-down-layout .icon4 {
    width: 130px;
    height: 60px;
    cursor: pointer;
    margin-left: 30px;
    background-image: url('../img/icon4.png');
    background-size: 100% 100%;
    background-repeat: no-repeat;
}

.mac-pc-down-layout .icon4:hover {
    background-image: url('../img/icon4-a.png');
    background-size: 100% 100%;
}

.code {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 190px;
    height: 160px;
    background-image: url('../img/code.png');
    background-size: 100% 100%;
    background-repeat: no-repeat;
}

.code-2 {
    margin-left: 20px;
    width: 130px !important;
    height: 130px !important;
}

.more {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 10px;
    font-size: 14px;
    color: #696E76;
    cursor: pointer;
    z-index: 3;
}

.more img {
    display: block;
    margin: 8px auto auto auto;
    width: 23px;
    height: 10px;
}

.play-btn {
    margin-top: 61px;
    cursor: pointer;
    width: 312px;
    height: 70px;
    background-image: url('../img/btn.png');
    background-size: 100% 100%;
    background-repeat: no-repeat;
}

.play-btn:hover {
    background-image: url('../img/btn-a.png');
    background-size: 100% 100%;
}

.about-footer {
    height: 60px;
    width: 100%;
    font-size: 12px;
    text-align: center;
    line-height: 30px;
    color: rgba(255, 255, 255, 0.5);
    z-index: 4;

}

.about-footer a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
}

.about-footer a:hover {
    text-decoration: underline;
}

.flex-align {
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
}

.flex-end {
    display: flex;
    justify-content: space-between;
    -webkit-box-align: end;
    ;
    -ms-flex-align: end;
    ;
    align-items: flex-end;
}

@media (max-width: 1400px) {
    .down-wrap {
        bottom: 8%;
    }

    .pc-down {
        width: 160px;
        height: 130px;
        margin-right: 10px;
        cursor: pointer;
        background-image: url('../img/icon2.png');
        background-size: 100% 100%;
        background-repeat: no-repeat;
    }

    .mac-pc-down {
        width: 160px;
        height: 130px;
        margin-right: 10px;
        cursor: pointer;
        background-image: url('../img/icon-bg.png');
        background-size: 100% 100%;
        background-repeat: no-repeat;
    }

    .mac-pc-down-layout .icon3 {
        width: 110px;
        height: 50px;
        margin-left: 30px;
        cursor: pointer;
        background-image: url('../img/icon3.png');
        background-size: 100% 100%;
        background-repeat: no-repeat;
        margin-bottom: 8px;
    }

    .mac-pc-down-layout .icon4 {
        width: 110px;
        height: 50px;
        margin-left: 30px;
        cursor: pointer;
        background-image: url('../img/icon4.png');
        background-size: 100% 100%;
        background-repeat: no-repeat;
    }

    .code {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 160px;
        height: 130px;
        background-image: url('../img/code.png');
        background-size: 100% 100%;
        background-repeat: no-repeat;
    }

    .code-2 {
        margin-left: 20px;
        width: 100px !important;
        height: 100px !important;
    }

    /* .down-a{
        width: 150px;
        height: 40px;
    } */
    .play-btn {
        bottom: 4%;
        width: 240px;
        height: 55px;
    }

    .banner.third {
        background-size: 150% 100%;
    }
}