.bann {
    width: 1400px;
    position: relative;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    margin-top: 30px;
}

.bann-function {
    width: 100%;
    height: 500px;
}

.function-text {
    width: 700px;
    height: 120px;
    float: left;
    margin-top: 200px;
}

.function-img {
    width: 700px;
    height: 500px;
    float: left;
    display: flex;
    justify-content: center;
    align-items: center;
}

.function-img img {
    width: 700px;
}

.bann-img {
    width: 100%;
    height: 200px;
}

.bann-img img {
    width: 100px;
    float: left;
    margin-left: 115px;
}

.bann-img p {
    margin-left: -80px;
    margin-top: 150px;
    float: left;
}
.function-detail
{
    width: 100%;
    height: 500px;
}
.detail-text
{
    width: 400px;
    height: 200px;
    float: left;
    margin-left: 50px;
    margin-top: 35px;
}
.left
{
    float: left;
}
.detail-text img
{
    width: 25px;
}
.detail-text p {
    margin-top: 20px;
}