.text-primary {
    color: #FBB653;
}

.font16 {
    font-size: 16px;
}

.back-white {
    background: #ffffff;
}

.layout {
    background: #FAFAFA;
}

html,
body,
.layout,
.main {
    height: 100%;
    margin: 0px;
}

.main {
    width: 100%;
    height: 400%;
}

.card {
    max-width: 1300px;
    height: 25%;
    margin: 0 auto;
    position: relative;
    display: flex;
    align-items: center;
    background-position: center center;
    background-size: contain;
    background-repeat: no-repeat;
}

.card .content {
    width: 1200px;
    margin: 0 auto;
    height: 300px;
    position: relative;
    margin-top: -100px;
}

.card .content .title {
    color: #ffffff;
    font-weight: 600;
    text-shadow: 3px 3px 5px rgba(0, 0, 0, 0.5);
}

.card .content .title.sub {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 36px;
}

.card .content .title.main {
    font-size: 64px;
    letter-spacing: 3px;
}

.card .content .text-intr {
    padding-left: 14px;
    font-size: 14px;
    font-family: PingFangSC-Regular, PingFang SC;
    font-weight: 400;
    color: #666666;
    line-height: 20px;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.card .content .btn-box {
    padding-left: 14px;
}

.card .content .btn-box a:nth-of-type(n+2) {
    margin-left: 10px;
}

.card.bg1 {
    background-image: url('/images/aboutus/1.jpg');
}

.card.bg2 {
    background-image: url('/images/aboutus/2.jpg');
}

.card.bg3 {
    background-image: url('/images/aboutus/3.jpg');
}

.card.bg4 {
    background-image: url('/images/aboutus/4.jpg');
}

.footer {
    margin-top: 40px;
}

@media screen and (max-width:1200px) {
    .main {
        box-sizing: border-box;
        width: 100%;
    }

    .card .content {
        width: 100%;
        text-align: center;
    }

    .card.erp .content .text-intr>p,
    .card.hardware .content .text-intr>p {
        margin: 0 auto;
    }
}

@media screen and (max-width:768px) {

    .top-nav {
        display: none;
    }

    .main {
        display: inherit;
    }

    .card {
        width: 100%;
        height: 25%;
        align-items: start;
        background-size: 100%;
    }

    .card .content {
        margin-top: 0;
    }

    .card.fireworks {
        background-image: url('/images/index/m_back4.jpg');
    }

    .card.cloud {
        background-image: url('/images/index/m_back1.jpg');
    }

    .card.erp {
        background-image: url('/images/index/m_back2.jpg');
    }

    .card.hardware {
        background-image: url('/images/index/m_back3.jpg');
    }

    .card .content {
        padding-top: 55%;
    }

    .card .content .title.sub {
        font-size: 20px;
    }

    .card .content .title.main {
        font-size: 28px;
    }

    .card .content .btn-box a {
        width: 130px;
        height: 40px;
        line-height: 40px;
        border-radius: 20px;
        font-size: 14px;
    }

    .card.fireworks .content {
        text-align: center;
    }

    .card.fireworks .content .text-intr,
    .card.cloud .content .text-intr,
    .card.erp .content .text-intr,
    .card.hardware .content .text-intr {
        width: 100%;
        box-sizing: border-box;
    }


    .card.fireworks .content .text-intr>p,
    .card.cloud .content .text-intr>p,
    .card.erp .content .text-intr>p,
    .card.hardware .content .text-intr>p {
        width: 100%;
        text-align: center;
        overflow: auto;
    }
}