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

.bann-function {
    width: 100%;
    margin-bottom: 100px;
    margin-top: 30px;
}

.bann-function {
    text-align: center;
}

.bann-function img {
    margin-top: 60px;
}

.bann-function2 {
    width: 100%;
    height: 400px;
}

.bann-function2 h2 {
    margin-top: 20px;
    text-align: center;
}
.bann-function2 p {
    margin-top: 20px;
}
.function-visual {
    width: 400px;
    height: 300px;
    float: left;
    margin: 33px;
}

.circle {
    width: 120px;
    height: 120px;
    border: 1px solid rgb(202, 202, 202);
    background-color: rgb(255, 255, 255);
    border-radius: 50%;
    margin-left: 140px;
    text-align: center;
    margin-top: 50px;
}

.circle img {
    width: 50px;
    height: 50px;
    margin-top: 35px;
}

.circle:hover {
    background-color: #1287d5;
}

.circle:hover img {
    content: url(../img/供应链服务2.png);
}

.circle2 {
    width: 120px;
    height: 120px;
    border: 1px solid rgb(202, 202, 202);
    background-color: rgb(255, 255, 255);
    border-radius: 50%;
    text-align: center;
    margin-top: 50px;
    margin-left: 140px;
}

.circle2 img {
    width: 50px;
    height: 50px;
    margin-top: 35px;
}

.circle2:hover {
    background-color: #1287d5;
}

.circle2:hover img {
    content: url(../img/仓库2.png);
}

.circle3 {
    width: 120px;
    height: 120px;
    border: 1px solid rgb(202, 202, 202);
    background-color: rgb(255, 255, 255);
    border-radius: 50%;
    text-align: center;
    margin-top: 50px;
    margin-left: 140px;
}

.circle3 img {
    width: 50px;
    height: 50px;
    margin-top: 35px;
}

.circle3:hover {
    background-color: #1287d5;
}

.circle3:hover img {
    content: url(../img/库存2.png);
}