.banner {
    width: 100%;
    height: 530px;
    background: #f8f8fb;
    position: relative;
    overflow: hidden;
}

.banner-center {
    width: 1200px;
    height: 100%;
    display: block;
    margin: 0 auto;
    position: relative;
}

.banner-center img {
    width: 1200px;
    height: 100%;
    background-size: 100%;
    position: absolute;
    top: 0;
    left: 0;
}

.banner-center .box {
    position: absolute;
    top: 0;
    left: 0;
}

.banner-center .title {
    font-weight: 500;
    font-size: 44px;
    color: rgba(0, 0, 0, 0.8);
    line-height: 62px;
    margin-top: 192px;
}

.banner-center .txt {
    font-weight: 400;
    font-size: 20px;
    color: #999999;
    width: 600px;
    margin-top: 12px;
}

.banner-center .btn {
    display: block;
    margin-top: 22px;
}

.commercial {
    width: 100%;
    padding-top: 106px;
}

.commercial-center {
    width: 1200px;
    height: 100%;
    display: block;
    margin: 0 auto;
}

.commercial-center .title {
    font-weight: 500;
    font-size: 40px;
    color: #333333;
    line-height: 56px;
    width: 100%;
    text-align: center;
    margin-bottom: 71px;
}

.commercial-center .box {
    display: flex;
    justify-content: space-between;
}

.commercial-center .box .item {
    width: 300px;
    text-align: center;
}

.commercial-center .box .item img {
    width: 56px;
    height: 56px;
    display: block;
    margin: 0 auto 16px;
}

.commercial-center .box .item .txt1 {
    font-weight: 400;
    font-size: 24px;
    color: #333333;
    width: 100%;
    margin-bottom: 16px;
}

.commercial-center .box .item .txt2 {
    font-weight: 400;
    font-size: 16px;
    color: #666666;
    width: 100%;
    text-align: left;
}

.solution {
    width: 100%;
    height: auto;
    padding-top: 100px;
    margin-bottom: 117px;
}

.solution-center {
    width: 1200px;
    display: block;
    margin: 0 auto;
}

.solution-center .title {
    font-weight: 500;
    font-size: 40px;
    color: #333333;
    width: 100%;
    text-align: center;
    margin-bottom: 48px;
}

.select {
    width: 460px;
    display: flex;
    justify-content: space-between;
    margin: 0 auto;
}

.sel-item {
    width: 80px;
    cursor: pointer;
    margin-bottom: 19px;
}

.sel-item img {
    display: block;
    margin: 0 auto 12px;
}

.sel-item p {
    font-weight: 400;
    font-size: 16px;
    color: #333333;
    text-align: center;
}

.line {
    width: 1000px;
    height: 1px;
    background: #eeeeee;
    margin: 0 auto 28px;
    position: relative;
}

.line span {
    width: 80px;
    height: 3px;
    background: #1890ff;
    position: absolute;
    top: -3px;
    left: 0px;
    transition: all 0.2s;
}

.line.on1 span {
    left: 270px;
}

.line.on2 span {
    left: 460px;
}

.line.on3 span {
    left: 652px;
}

.solution-center .item {
    width: 100%;
    display: flex;
    justify-content: space-between;
}

.left {
    width: 612;
}

.left img {
    width: 612;
    height: 468px;
    background-size: 100%;
    display: block;
}

.right {
    width: 500px;
    padding-top: 43px;
}

.right .r-item {
    margin-bottom: 32px;
}

.right .r-item .txt1 {
    font-weight: bold;
    font-size: 18px;
    color: #333333;
    line-height: 25px;
    margin-bottom: 9px;
}

.right .r-item .txt2 {
    font-weight: 400;
    font-size: 16px;
    color: #666666;
}