* {
    box-sizing: border-box;
    outline: none;
}

html, body {
    margin: 0;
    padding: 0;
    font-size: 14px;
    font-family: sans-serif;
}

a {
    color: #888;
    text-decoration: none;
}

.header {
    /*height: 16rem;*/
    height: 5rem;
    /*background: #345 url(image/banner.png) no-repeat right center / cover;*/
    background: #345 url(image/banner.png) no-repeat right top / cover;
    color: #fff;
    text-align: center;
    padding-top: 6rem;
}

.header .info {
    color: #9ba3aa;
}

.nav {
    display: none;
}

.nav a {
    color: #fff;
}

.logo {
    display: block;
    height: 2rem;
    position: absolute;
    top: 2rem;
    left: 2rem;
}

.section {
    text-align: center;
    padding: 2rem;
}

.introduce {
    width: 60rem;
    text-align: left;
    padding: 4rem 2rem;
    margin: 0 auto;
}

.introduce .content {
    text-indent: 2.5rem;
    margin-top: 1.5rem;
    font-size: 1.25rem;
    line-height: 2.5rem;
}

.introduce .icons {
    margin-top: 5rem;
    display: -webkit-box;
    display: flex;
    -webkit-box-orient: horizontal;
    -webkit-box-direction: normal;
    flex-direction: row;
    -webkit-box-align: center;
    align-items: center;
    -webkit-box-pack: center;
    justify-content: center;
}

.introduce .icons > img {
    margin: 0 2rem;
}

.introduce-bg {
    width: 70rem;
    margin: 0 auto;
    height: 40rem;
}

.introduce-bg > img {
    width: 100%;
}

.introduce2 {
    width: 70rem;
    padding: 4rem 2rem;
    margin: 0 auto;
}

.introduce2 > hr {
    margin: 0 5rem;
}

.introduce2 .part1 {
    padding: 0 5rem;

}

.introduce2 .part2 {
    padding: 0 5rem;
}

.introduce2 .part3 {
    padding: 0 5rem;
    background: no-repeat url(image/introduce2_bg.png) center bottom / contain;
}

.introduce2 .part1 > img {
    width: 50%;
    padding: 4rem;
}

.introduce2 .part2 > img {
    width: 50%;
    padding: 4rem;
}

.introduce2 .part3 > img {
    width: 50%;
    padding: 2rem 4rem 6rem 4rem;
}

.introduce2 .part1 > p {
    width: 45%;
    display: inline-block;
    text-align: left;
    text-indent: 2.5rem;
    font-size: 1.25rem;
    line-height: 2.5rem;
}

.introduce2 .part2 > div {
    width: 45%;
    text-align: left;
    display: inline-block;
    text-indent: 2.5rem;
    font-size: 1.25rem;
    line-height: 2.5rem;
}

.introduce2 .part2 > p {
    display: inline-block;
}

.introduce2 .part3 > div {
    display: inline-block;
    width: 45%;
    text-indent: 2.5rem;
    font-size: 1.5rem;
    line-height: 2.5rem;
}

.other {
    background-color: #0373C7;
    color: #ffffff;
}

.project-case {
    width: 60rem;
    margin: 0 auto;
    text-align: left;
    padding: 4rem 2rem;
}

.project-case .bg {
    width: 31.5rem;
    height: 20.5rem;
    margin-top: 8rem;
    margin-left: 24rem;
}

.project-case .second-title {
    font-size: 1.5rem;
    margin: 2rem 0 1rem 0;
}

.project-case .item {
    display: inline-block;
    width: 49%;
    font-size: 1.25rem;
    margin: 0.5rem 0;
}

.project-case .item .white-piece {
    display: inline-block;
    width: 0.75rem;
    height: 0.75rem;
    background-color: white;
    margin-bottom: 0.1rem;
    margin-right: 1rem;
}

.show {
    width: 60rem;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.show .title {
    margin: 0.5rem;
}

.show .second-title {
    margin-top: 6rem;
}

.show .qrcode-list .item {
    display: inline-block;
    margin: 0 0.5rem;
}

.show .qrcode-list .item > img {
    width: 8rem;
    height: 8rem;
}

.show .qrcode-list .item > p {
    margin: 0.5rem 0;
}

.service > div {
    padding: 1rem 0;
    margin: .5rem 0;
    position: relative;
    background: no-repeat 3vw center / 5rem 5rem;
    padding-left: 8rem;
    text-align: left;
}

.service .title {
    font-size: 1.1rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.service .desc {
    word-break: break-all;
    overflow-word: break-word;
    line-height: 1.5rem;
    font-size: .95rem;
    color: #a0a0a0;
}

.features {
    background: url(image/features_bg.png) center center / cover;
    color: #fff;
    text-align: left;
    padding: 4rem 2rem;
}

.features-text {
    padding-left: 52%;
}

.features .list {
    margin: 1rem 0;
}

.features .title {
    font-weight: bold;
    margin: 1rem 0 .6rem 0;
}

.features .info {
    color: #b9bfc9;
    font-size: .9rem;
}

.product {
    background: url(image/product_bg.png) center center / cover;
    padding: 3rem 2rem;
    text-align: left;
    color: #fff;
}

.product .tabs {
    padding: 1rem 0;
}

.product .tabs a {
    margin-right: 1rem;
    font-weight: bold;
    color: #fff;
    display: inline-block;
    line-height: 2.4rem;
}

.product .tabs a.active {
    border-bottom: solid 2px #ffffff;
}

.product .pages > div {
    display: none;
    color: #989ca2;
}

.product .pages .active {
    display: block;
}

.product .title {
    display: none;
}

.about {
    background: url(image/about_bg.png) no-repeat center center / cover;
}

.about div {
    text-align: left;
    line-height: 2rem;
    color: #606060;
    font-size: 1.1rem;
}

.about p {
    text-indent: 2rem;
}

.case {
    background: #303242;
}

.case h3 {
    color: #fff;
}

.case > div {
    text-align: left;
    margin: 3rem 0;
    background: #fff;
}

.case img {
    display: block;
    width: 100%;
}

.case > div div {
    padding: 1rem;
}

.business {
    background: #eff3f6;
}

.business img {
    display: inline-block;
    margin: 1rem;
    width: 8rem;
}

.contact {
    background: #29292c;
    padding: 3rem 1rem;
    overflow: hidden;
}

.contact h3 {
    color: #fff;
    text-align: left;
}

.contact .details {
    text-align: left;
    width: 70%;
}

.contact .details p {
    line-height: 2rem;
    margin: 0;
    padding: 0;
    padding-left: 3rem;
    font-size: .8rem;
    color: #eaecf3;
}

.contact > div {
    float: left;
    color: #eaecf3;
}

.contact .wechat {
    float: right;
}

.contact .icon::before {
    background: no-repeat center center;
    display: block;
    width: 2rem;
    height: 2rem;
    position: absolute;
    content: '';
    margin-left: -2.5rem;
}

.icon.email::before {
    background-image: url(image/email.png);
}

.icon.phone::before {
    background-image: url(image/phone.png);
}

.icon.address::before {
    background-image: url(image/address.png);
}

.wechat {
    width: 30%;
}

.wechat div {
    color: #a0a0a0;
    font-size: .8rem;
}

.wechat .title {
    color: #fff;
    font-size: 1.03rem;
}

.wechat img {
    display: inline-block;
    width: 4rem;
}

.footer {
    background: #29292c;
    border-top: solid 1px #47494a;
    padding: 3rem 2rem;
    color: #707070;
    font-size: .8rem;
    text-align: center;
}

/*默认样式，主要是position:fixed实现屏幕绝对定位*/
#gotoTop {
    display: none;
    position: fixed;
    top: 75%;
    left: 50%;
    cursor: pointer;
    margin-top: -50px;
    /*margin-left: 520px;*/
    margin-left: 600px;
    padding: 9px 4px;
    width: 64px;
    height: 64px;
    text-align: center;
    border: 1px solid #e0e0e0;
    background: #fff;
    background-image: url("image/arrow_up.png");
}
/*鼠标进入的反馈效果*/
#gotoTop.hover {
    background: #eee;
    background-image: url("image/arrow_up.png");
    text-decoration: none;
}

@media all and (min-width: 640px) {
    .header {
        /*height: 40rem;*/
        height: 5rem;
    }

    .header h1 {
        padding-top: 10rem;
    }

    .logo {
        top: 2rem;
        left: 50%;
        margin-left: -32vw;
    }

    .nav {
        display: block;
        position: absolute;
        top: 0;
        left: 50%;
        width: 72rem;
        margin-left: -36rem;
        text-align: right;
    }

    .nav a {
        font-size: 1.2rem;
        line-height: 5rem;
        padding: 0 2rem;
        display: inline-block;
    }

    .nav a:hover {
        background: linear-gradient(#000000aa, #00000000);
    }

    .service {
        width: 720px;
        margin: 0 auto;
        overflow: hidden;
        margin-top: 2rem;
    }

    .service > div {
        display: block;
        float: left;
        width: calc(100% / 3);
        background: no-repeat center .5rem / 5rem 5rem;
        text-align: center;
        padding: 2rem 2rem;
        padding-top: 8rem;
    }

    .features-text {
        padding-left: 65%;
    }

    .features .list {
        margin-top: 5rem;
    }

    .features .title {
        margin-top: 3rem;
    }

    .product {
        padding-left: 15vw;
    }

    .about div {
        width: 720px;
        margin: 0 auto;
        font-size: .9rem;
    }

    .case > div {
        display: inline-block;
        width: 212px;
        margin: 0 1rem;
        height: 100%;
        font-size: .7rem;
    }

    .case > div div {
        padding: 1rem .5rem;
    }

    .contact {
        text-align: center;
    }

    .contact h3 {
        width: 720px;
        margin: 0 auto;
    }

    .contact .details {
        display: inline-block;
        width: 504px;
        float: none;
    }

    .contact .wechat {
        display: inline-block;
        width: 216px;
        float: none;
    }

    .product {
        overflow: hidden;
    }

    .product h3 {
        margin-bottom: 3rem;
    }

    .product .title {
        display: block !important;
        font-weight: bold;
        color: #fff;
        line-height: 2.4rem;
    }

    .product .pages {
        width: 600px;
    }

    .product .pages > div {
        display: block !important;
        float: left;
        width: 50%;
    }

    .product .tabs {
        display: none !important;
    }
}