.banner {
    margin-top: 100px;
    position: relative;
}
.banner img {
    display: block;
    width: 100%;
    min-width: 1200px;
    margin: 0 auto;
}

/*part1*/
.cloud-content {
    width: 100%;
    padding: 40px 0;
    text-align: center;
}
.part {
    width: 1200px;
    margin: 0 auto;
}
.part1 h3 {
    font-size: 24px;
    padding-bottom: 20px;
    font-weight: normal;
}
.part1 img {
    margin-top: 30px;
}
/*part2*/
.part2 h3 {
    color: #fff;
    font-size: 26px;
}
.part2 ul {
    overflow: hidden;
    margin-top: 30px;
}
.part2 ul li {
    float: left;
    width: 25%;
    text-align: center;
    color: #fff;
}
.part2 ul li img {
    display: block;
    margin: 0 auto;
}
.part2-li-title {
    font-size: 18px;
    width: 202px;
    height: 50px;
    text-align: center;
    line-height: 50px;
    background: #da9824;
    border-radius: 25px;
    margin: 20px auto;
}
.part2-li-in {
    width: 202px;
    text-align: center;
    font-size: 16px;
    margin: 0 auto;
}