.bann {
    width: 1400px;
    height: auto;
    position: relative;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    margin-top: 60px;
}

.bann-introduce {
    width: 100%;
    height: 600px;
    background-color: #ffffff;
}

.introduce-title {
    width: 100%;
    height: 100px;
    color: #000000;
    text-indent: 2em;
    line-height: 100px;
    border-bottom: 2px solid rgb(196, 196, 196, 0.2);
}

.introduce-content {
    width: 100%;
    height: 500px;
}

.introduce-left {
    width: 700px;
    height: 100%;
    float: left;
}

.left-text {
    width: 600px;
    height: 280px;
    float: left;
    margin: 80px 50px 0px 50px;
}

.left-text p {
    color: #666666;
    text-indent: 2em;
    line-height: 30px;
}

.introduce-left input {
    width: 140px;
    height: 40px;
    border: #cdcdcd 1px solid;
    margin-top: 20px;
    margin-left: 50px;
    color: #666666;
}

.introduce-left input:hover {
    color: #fff;
    background-color: #1287d5;
}

.introduce-right {
    width: 700px;
    height: 100%;
    float: left;
    display: flex;
    justify-content: center;
    align-items: center;
}

.introduce-right img {
    width: 650px;
    height: auto;
}

.bann-culture {
    width: 100%;
    height: 750px;
    background-color: #fff;
    margin-top: 60px;
}

.culture-title {
    width: 100%;
    height: 100px;
    color: #000000;
    text-indent: 2em;
    line-height: 100px;
    border-bottom: 2px solid rgb(196, 196, 196, 0.2);
}

.culture-content {
    width: 1300px;
    height: 550px;
    margin: 50px 50px 25px 50px;
}

.culture1 {
    width: 413px;
    height: 550px;
    float: left;
}

.culture1 img {
    width: 413px;
    height: 550px;
}

.culture2 {
    width: 413px;
    height: 260px;
    float: left;
}

.culture2 img {
    width: 413px;
    height: 260px;
}