.swiper-post-main { overflow: hidden; }
.swiper-post-thumbs { overflow: hidden; }
.swiper-post-thumbs .swiper-slide { opacity: 0.5; transition: opacity .2s; }
.swiper-post-thumbs .swiper-slide-thumb-active { opacity: 1; }
.swiper-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    width: 36px;
    height: 36px;
    background: rgba(0,0,0,0.55);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}
.swiper-post-main-prev { left: 8px; }
.swiper-post-main-next { right: 8px; }