.research-section {
    padding-bottom: 50px;
    position: relative; 
}
.product-title {
    padding: 50px 10px 30px;
    font-weight: normal;
    font-size: 36px;
    line-height: 46px;
    color: #252b3a;
    text-align: center;
    color: #ffffff
}
.resrarch-wrapper {
    max-width: 100%;
    padding:0;
    margin-left: auto;
    margin-right: auto;
    position: relative
}
.swiper-wrapper{
    padding:0 0 60px 0;
}
.swiper-container {
    margin-left: auto;
    margin-right: auto;
    position: relative;
    overflow: hidden;
    z-index: 1
}

/* .research-features .product-body {
    margin: 0px 25px
} */
/* .research-features .product-body:after {
    content: "";
    width: 100%;
    height: 3px;
    background: url(../images/productBase-features-model.png) no-repeat;
    background-size: 100% auto;
    background-position: center;
    position: absolute;
    top: 50px;
    left: 0;
    z-index: 0
} */
/*li*/
.features-item {
    position: relative;
    float: left;
    height: 740px;
    position: relative;
}
/* .features-slide .features-item>* {
    text-align: center
} */
.features-item h3 {
    font-size: 16px;
    line-height: 28px;
    margin-bottom: 50px;
    color: #ffffff;
    opacity: 0.7;
    transition: all 0.1s
}
.features-item i {
    position: absolute;
    width: 75%;
    height: 33px;
    background: url(../images/productBase-features-timeline.png) no-repeat;
    background-size: contain;
    background-position: right center;
    left: -25%;
    margin-left: 10px;
    top: 35px;
    z-index: 3
}
.features-item .features-info {
    display: block;
    margin: 0 auto;
    padding: 20px 53px;
    transition: all 0.3s;
    border-radius: 2px
}
.features-item .features-info .features-info-i {
    font-size: 14px;
    color: #A0A2A8;
    line-height: 22px;
    margin-bottom: 10px
}
.features-item .features-info .features-info-s {
    font-size: 16px;
    color: #FFFFFF;
    line-height: 24px;
    overflow: hidden
}
.features-item.dark i {
    background: url(../images/productBase-features-timeline-dark.png) no-repeat;
    background-size: contain;
    background-position: right center
}
/*鼠标悬浮效果*/
/* .features-item:hover h3 {
    font-size: 22px;
    line-height: 28px;
    opacity: 0.9
}
.features-item:hover i {
    width: 75%;
    margin-left: 13px;
    background: url(../images/productBase-features-timeline-hover.png) no-repeat;
    background-size: contain;
    background-position: right center
}
.features-item:hover a {
    background: url(../images/productBase-features-info.png) no-repeat;
    background-size: 100% 100%
} */
/*左右按钮*/
 

.research-features .swiper-button-prev {
    background:url(../images/researchicon02.png) no-repeat;
    width: 52px;
    height: 36px;
    background-size: 100% 100%;
    left: 50px;
    bottom:90px;
    top:auto;
}
/* .research-features .swiper-button-prev:after {
    content: "";
    display: inline-block;
    position: absolute;
    width: 15px;
    height: 30px;
    background: url(../images/productBase-features-left.png) no-repeat;
    background-size: 100% 100%;
    top: 50%;
    margin-top: -15px;
    left: 50%;
    margin-left: -7px
} */
.research-features .swiper-button-next {
    background:url(../images/researchicon03.png) no-repeat;
    width: 52px;
    height: 36px;
    background-size: 100% 100%;
    right: 50px;
    bottom: 90px;
    top:auto;
}
/* .research-features .swiper-button-next:after {
    content: "";
    display: inline-block;
    position: absolute;
    width: 15px;
    height: 30px;
    background: url(../images/productBase-features-right.png) no-repeat;
    background-size: 100% 100%;
    top: 50%;
    margin-top: -15px;
    left: 50%;
    margin-left: -7px
}
 */


@media screen and (max-width: 768px){
    .research-features .swiper-button-prev { 
    width: 24px;
    height: 24px; 
    left: 0;
    bottom: 61px;
    top: auto;
}
    .research-features .swiper-button-next { 
    width: 24px;
    height: 24px; 
    right: 0;
    bottom: 61px;
    top: auto;
}
.features-item{
    height: 400px;
}
.research-section{
    padding-bottom:20px;
}
.resrarch-content-height { 
    max-height: 400px;
    /* background: #fbfbfb; */ 
}
.swiper-wrapper {
    padding: 0px 0 54px 0;
    margin:20px 0 0 0;
}

}