#headerWrapper{
    position: relative;
}
.head-backgroud{
    position: relative;
    z-index: 1;
}
#register-topnav{
    position: absolute;
    top: 0px;
    background-color: rgba(6, 13, 13, 0.2);
    z-index: 10;
}
.wrapper{
    overflow: hidden;
    padding: 0;
    margin: 0 auto;
}
.section-item{
    height:520px;
    position: relative;
}
.has-img{
    width: 600px;
    float: left;
}
.has-text{
    width: 600px;
    float: left;
}
.text-title{
    font-size: 34px;
    color: #333333;
    margin-bottom: 30px;
    font-weight: 500;
    white-space: nowrap;
}
.text-content{
    color: #88899A;
    font-size: 15px;
    line-height: 30px;
    width: 430px;
}
.thumbnail{
    border: 0;
}
.thumbnail img{
    max-width: 308px;
    margin-top: 158px;
}
.section-img1{
    margin-top: 158px;
    margin-left: 129px;
}
.section-img2{
    margin-top: 118px;
    margin-left: 126px;
    max-width: 306px;
}
.section-img3{
    margin-top: 152px;
    margin-left: 71px;
}
img.section-img3{

}
.text-wrapper1{
    position: relative;
    width: 430px;
    margin: 158px 53px 158px 117px;
}
.text-wrapper2{
    margin-top: 190px;
}
.text-wrapper2 .text-content{
    width: 442px;
}
.text-wrapper3{
    margin-top: 190px;
    margin-left: 109px;
}
[class^='text-wrapper']{
    width: 1200px;
}
.section-item-bg{
    background-color: #fafafa;
}
.section-content {
    width: 1200px;
    position: absolute;
    left: 50%;
    transform: translateX(-600px);
}


/* // =====开始===== */
/* 自适应调整 新增 2017-12-11 */
@media screen and (max-width: 992px) {
    .section-item {
        height: 800px;
    }
    .section-item .section-content {
        left: 0;
        transform: none;
    }
    .section-item .section-content .has-text,
    .section-item .section-content .has-img {
        height: 400px;
    }
    .section-item .section-content .has-img div {
        margin-top: 80px;
    }
    .section-item .section-content,
    .section-item .section-content .has-text,
    .section-item .section-content .has-text div,
    .section-item .section-content .has-img {
        width: 100%;
    }
    .section-item .section-content .has-text div,
    .section-item .section-content .has-text div p,
    .section-item .section-content .has-img div{
        text-align: center;
    }
    .section-item .section-content .has-text div {
        margin: 100px auto;
    }
    .section-item .section-content .has-text p.text-content {
        margin: 0 auto;
    }
    .section-item .section-content .has-img div img {
        margin: 0;
    }
}

@media screen and (max-width: 767px) {
    .head-backgroud .ad-title p.title-main {
        font-size: 38px;
    }
}

@media screen and (max-width: 475px) {
    .section-item .section-content .has-text p.text-content {
        width: 80%;
    }
    .section-item .section-content .has-img div img {
        width: 80%;
    }
    .section-item .section-content .has-text p.text-title{
        font-size: 20px;
    }
    .head-backgroud .ad-title p.title-main {
        font-size: 30px;
    }
}
/* // =====结束===== */