.pTB {
    padding: 100px 0;
}

.head {
    background: url(../../static/images/weChatSurvey/bg.jpg) no-repeat;
    background-size: cover;
    width: 100%;
    height: 100%;
}

.binding {
    width: 100%;
    background: #f9fafb;
}

.bT60_content{
    height: 669px;
}

.case {
    width: 100%;
    height: 610px;
    background: url(../../static/images/weChatSurvey/case.jpg) no-repeat center center;
    color: #fff;
    margin-top: 447px;
}

.case .title {
    color: #fff;
}

.case .pTitle {
    margin-top: 100px;
    font-size: 18px;
    line-height: 48px;
}
.case .title{
    margin-top: -550px;
    padding-top: 80px;
}
.mT100{
    position: relative;
    top:90px;
}
.postion{
    position: relative;
    top:120px;
}