.cent_img{
    width: 100%;
    display: block;
}
.cent_img.pc{
    display: block;
}
.cent_img.mob{
    display: none;
}
.top_main{
    position: relative;
}
.back-home{
    position: absolute;
    width: 1.3rem;
    top: .7rem;
    right: .7rem;
}
.back-home img{
    width: 100%;
}
.video_main{
    position: relative;
}
.video_cent{
    width: 10.5rem;
    height: 5.8rem;
    background: #fff;
    position: absolute;
    left: 0;
    right: 0;
    margin: auto;
    top: 3.1rem;
}
.video_cent video{
    width: 100%;
    height: 100%;
    outline: none;
    object-fit: cover;
}
.video_swiper{
    width: 10.5rem;
    display: flex;
    position: absolute;
    left: 0;
    right: 0;
    margin: auto;
    top: 9.1rem;
    text-align: center;
    
}
.video_swiper .swiper-slide img{
    width: 100%;
}
.swiper_btn{
    width: .4rem;
    height: .8rem;
    font-size: .3rem;
    color: #282828;
    position: absolute;
    top: .04rem;
    line-height: .8rem;
    cursor: pointer;
    outline: none;
}
.swiper_btn.prev{
    left: -.5rem;
}
.swiper_btn.next{
    right: -.5rem;
}
.zhib_main{
    position: relative;
}
.zhib_cent{
    width: 10.5rem;
    height: 5.92rem;
    background: #fff;
    position: absolute;
    left: 0;
    right: 0;
    margin: auto;
    top: 1.9rem;
}

.ewm_main{
    display: none;
}

@media screen and (max-width: 750px) {
    .cent_img.pc{
        display: none;
    }
    .cent_img.mob{
        display: block;
    }
    .video_cent{
        width: 7.2rem;
        height:4.1rem;
        margin: 0 auto;
        top: 2.68rem;
    }
    .video_swiper{
        width:7.2rem;
        margin: 0 auto;
        top: 6.9rem;
    }
    .zhib_cent{
        margin: auto;
        width: 7.1rem;
        height: 3.98rem;
    }
    .video_swiper{
        width: 6.2rem;
    }
    .swiper_btn{
        height: .6rem;
        line-height: .6rem;
    }
    .ewm_main{
        display: block;
        position: relative;
    }
    .ewm_cent{
        display: flex;
        align-items: flex-start;
        width: 6.5rem;
        justify-content: space-between;
        position: absolute;
        left: 0;
        right: 0;
        margin: auto;
        top: .4rem;
    }
    .ewm_cent>img{
        width: 2rem;
    }
}