.swiper-wrapper img {
    width: 100%;
}
.swiper-backface-hidden .swiper-slide .btn_b {
    position: absolute;
    bottom: 2em;
    right: 2em;
}

.main_iamge .swiper_btn {
    position: absolute;
    bottom: 20px;
    z-index: 1;
    left: 20px;
}
.main_iamge .swiper_btn button {
    margin-right: 20px;
    width: 5vw;
    height: 5vw;
    max-width: 20px;
    max-height: 20px;
    border: none;
    background: none;
    position: relative;
}
.main_iamge .swiper_btn button.swiper_start:before {
    content: "";
    border-left: 1em solid #4895d9;
    border-top: 0.75em solid transparent;
    border-bottom: 0.75em solid transparent;
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    top: 0;
    margin: auto;
}

.main_iamge .swiper_btn button.swiper_pause:before {
    content: "";
    width: 34%;
    height: 100%;
    background: #4895d9;
    position: absolute;
    left: 5%;
    top: 0;
    bottom: 0;
    margin: auto;
}
.main_iamge .swiper_btn button.swiper_pause:after {
    content: "";
    width: 34%;
    height: 100%;
    background: #4895d9;
    position: absolute;
    right: 5%;
    top: 0;
    bottom: 0;
    margin: auto;
}


.main_iamge .swiper-pagination {
    position: relative;
    padding: 20px 0;
    left: 0;
    right: auto;
    text-align: left;
}
.main_iamge .swiper-pagination span.swiper-pagination-bullet {
    display: inline-block;
    width: 3.5vw;
    height: 12px;
    margin: 0 5px;
    padding: 0;
    cursor: pointer;
    border-radius: 0;
    background: #686868;
}


@media only screen and (max-width: 1024px) {
.main_iamge .swiper_btn {
    bottom: 10px;
    left: 10px;
}
.main_iamge .swiper-pagination span.swiper-pagination-bullet {
    width: 6vw;
    height: 6px;
}
}

@media only screen and (max-width: 768px) { 
.swiper-backface-hidden .swiper-slide .btn_b {
    bottom: 0em;
    right: 0em;
    font-size: 2.6vw;
    min-width: 100px;
}
}