.feature{
    padding-top: 130px;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    background-color: #f3f3f3;
}
.feature .swiper-container-free-mode>.swiper-wrapper {
    transition-timing-function: linear;
    -webkit-transition-timing-function: linear; /* Safari and Chrome */
    margin: 0 auto;
}
.feature_group{
    height: 100%;
    width: 100%;
    padding-top: 60px;
}
.feature_item{
    display: flex;
    flex:1;
    min-width: 19%;
    height: 100%;
    float: left;
    overflow: hidden;
    animation: width_19 0.3s ease-out;
}
.feature_item::before{
    content: "";
    position: absolute;
    top: 0;
    left: 50%;
    width: 100%;
    height: 100%;
    transform: translate(-50%,0);
    background-color: rgba(0,0,0,.5);
    z-index: 2;
}
.feature_item.hover{
    width: 25%;
    flex: none;
    max-width: 25%;
    top: -60px;
    height: calc(100% + 60px);
    z-index: 99999;
    border-top-right-radius: 12px;
    border-top-left-radius: 12px;
    animation: width_25 0.5s ease-out;
}
@keyframes width_25 {
	0% {width: 19%;}
	100% {width: 25%;}
}
@keyframes width_19 {
	0% {width: 25%;}
	100% {width: 19%;}
}
.feature_item.hover::before{
    background-color: rgba(0,0,0,0);
}
.feature_item img{
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height:auto;
    transform: translate(-50%,-50%);
}
.feature_item .caption{
    position: absolute;
    top: 50%;
    transform: translate(0,-50%);
    display: flex;
    justify-content: center;
    flex-direction: column;
    width: 100%;
    height: 165px;
  /*  background-color: #e95341; */
    opacity: 0.9;
    text-align: center;
    z-index: 9;
    color: #fff;
    line-height: 35px;
}
.feature_item.hover .caption{
    bottom: 0;
    transform: translate(0,0);
    top: auto;
    background-color: #e95341;
}
@media only screen and (min-width: 1400px){
    .feature{
        padding-top: 130px;
    }
    .feature_item .caption{
        height: 165px;
        line-height: 35px;
    }
}
@media only screen and (max-width: 1399px){
    .feature{
        /* padding-top: 1.4rem; */
        padding-top: 1.2rem;

    }
    .feature_group{
        padding-top: .4rem;
    }
    .feature_item .box{
        height: 100%;
        width: 100%;
        overflow: hidden;
    }
    .feature_item.hover{
        top: -.4rem;
        height: calc(100% + .4rem);
        border-top-right-radius: .1rem;
        border-top-left-radius: .1rem;
    }
    .feature_item .caption{
        height: 1.2rem;
        line-height: .26rem;
    }
    .feature_item .caption h1{
        font-size: .2rem;
    }
}
@media only screen and (max-width: 750px){
    .feature_group{
        padding: .4rem .6rem .6rem;
    }
    .feature_item {
        display: block;
        flex: none;
        height: 30%;
        float: none;
        overflow: hidden;
        border-radius: .1rem;
        animation:none;
    }
    .feature_item.hover {
        width: 100%;
        flex: none;
        max-width: 100%;
        top: 0;
        height: 30%;
        z-index: 99999;
        animation:none;
        box-shadow: 1px 1px 10px rgba(0,0,0,.4);
    }
    .feature_item .caption {
        height: 1.5rem;
        line-height: 1.5;
        padding: 0 .2rem;
    }
    .feature_item .caption h1 {
        font-size: .3rem;
    }
    .feature_group .control {
        width: .8rem;
        height: .8rem;
        font-size: .36rem;
        line-height: .8rem;
        opacity: .8;
        border-top-left-radius: .1rem;
        border-bottom-left-radius: .1rem;
    }
}