.event .swiper-slide {transition: .3s;}
.event .swiper-slide-next, 
.event .swiper-slide-prev {filter: grayscale(1);}
.event .swiper-slide-active {filter: grayscale(0);}
.event .swiper-slide-next .txt_box, 
.event .swiper-slide-prev .txt_box {display: none; transition: .3s;}
.event .swiper-slide-active .txt_box {display: block;}
.event .swiper-slide-next .txt_box .ev_title, 
.event .swiper-slide-prev .txt_box .ev_title, 
.event .swiper-slide-next .txt_box .bo_cn, 
.event .swiper-slide-prev .txt_box .bo_cn {opacity: 0; transition: .3s;}
.event .swiper-slide-active .txt_box .ev_title, 
.event .swiper-slide-active .txt_box .bo_cn {opacity: 1;}
.event .swiper-button-next, .event .swiper-button-prev {position: relative; width: 25px; height: 46px; margin-top: 0; position: absolute;}
.event .swiper-buttons {position: absolute;bottom: 12.5%;left: 50%;transform: translateX(-50%); width: 60%; 
z-index: 10;  }
.event .swiper-button-next::after, .event .swiper-button-prev::after {content: ''; background-repeat: no-repeat; background-position: center; background-size: cover; width: 100%; height: 100%;}
.event .swiper-button-next::after {background-image: url(/img/main/swiper_next.png); }
.event .swiper-button-prev::after {background-image: url(/img/main/swiper_prev.png); }

.swiper-button-prev, .swiper-rtl .swiper-button-next {left: 0; right: auto;}
.swiper-button-next, .swiper-rtl .swiper-button-prev {right: 0; left: auto;}
 
@media (max-width: 990px){
    .event .swiper-buttons {width: 90%; bottom: 17.5%; }
    .event .swiper-button-next, .event .swiper-button-prev {width: 15px; height: 25px;}
}
/* @media (max-width: 375px){
    .event .swiper-buttons {bottom: auto; top: 80%; }
} */