.contain {
    margin-top: 75px;
}
/* banner */
.banner {
    position: relative;
    width: 100%;
    margin-top: 75px;
}
.banner img {
    width: 100%;
    height: 100%;
}
.banner .w {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translate(-50%);
    height: 100%;
}
/*  banner页上的文字 */
.banner .w .banner-text {
    position: absolute;
    top: 50%;
    width: 100%;
    transform: translateY(-50%);
    text-align: center;
    color: #fff;
}
.banner .w .banner-text .banner-title {
    font-size: 72px;
    font-weight: normal;
}
.banner .w .banner-text .banner-contain{
    margin-top: 25px;
    font-size: 28px;
    line-height: 1.5;
}
/* 客户案例 */
.contain h2 {
    text-align: center;
    font-size: 40px;
}
.contain>div p:nth-child(2) {
    margin-top: 15px;
}
.contain .describe {
    font-size: 18px;
}
.contain p {
    color: #444444;
    text-align: center;
    line-height: 28px;
}
.contain .user-case {
    /* height: 982px; */
}
.contain .user-case h2 {
    margin-top: 80px;
}
.contain .user-case li {
    position: relative;
}
.contain .user-case li img {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    transform: translate(-50%,-50%) rotate(-45deg);
}
.contain .brands-logo {
    margin: 100px auto 120px;
}
.contain .brands-logo ul {
    width: 1280px;
    margin: 0 auto;
}
.contain .brands-logo li {
    float: left;
    width: 100px;
    height: 100px;
    margin: 0 30px;
    box-shadow: 1px 1px 10px rgba(0,0,0,0.05);
    transform: rotate(45deg);
    transition: all 0.5s;
}
.contain .brands-logo li:hover {
    transform: rotate(45deg) scale(1.2);
}
.contain .brands-logo ul:nth-child(2) {
    width: 1120px;
}
.contain .brands-logo ul:nth-child(3) {
    width: 960px;
}
.contain .brands-logo ul:nth-child(4) {
    width: 800px;
}
.contain .brands-logo ul:nth-child(5) {
    width: 640px;
}