.mainBanner{
    width: 100%;
    height: 900px;
    /* background-color: antiquewhite; */
    margin-bottom: 100px;
}
.mainBanner ul{
    display: flex;
    flex-direction: row;
    width: 100%;
    height: 100%;
}
.mainBanner ul li{
    width: 8vw;
    height: 100%;
    transition: all 0.5s;
    cursor: pointer;
    background-color: black;
    overflow: hidden;
}
.mainBanner ul li.active{
    width: 68vw;
    opacity: 1;
    position: relative;
}
.mainBanner ul li iframe{
    display: none;
}
.mainBanner ul li.active iframe{
    display: block;
}
.mainBanner ul li .b-item{
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
}
.mainBanner ul li.active .b-item > img,
.mainBanner ul li.active .b-item > h2{
    display: none;
}
.mainBanner ul li.active .bannerTitle{
    position: absolute;
    bottom: 0;
    left: 0;
    margin: 0 0 4% 4%;
}
.mainBanner ul li.active .bannerTitle h2{
    color: #fff;
    font-size: 70px;
    font-weight: bold;
    margin: 40px 0;
    transform-origin: left;
    animation: scale 2s forwards;
    /* font-family: 'BMDOHYEON'; */
}

@keyframes scale{
    0%{
        transform: scale(1.5);
    }
    100%{
        transform: scale(1);
    }
}
.mainBanner ul li .bannerTitle{
    display: none;
}
.mainBanner ul li.active .bannerTitle{
    display: block;
}
.mainBanner ul li.active .bannerTitle button{
    padding: 15px 40px;
    border-radius: 5px;
    background-color: #fff;
    color: black;
    font-size: 16px;
    font-weight: 700;
    z-index: 1;
    border: none;
    cursor: pointer;
    transition: all 0.5s;
    position: relative;
}
.mainBanner ul li.active .bannerTitle button:after {
    content: "";
    border-radius: 5px;
    width: 0%;
    height: 100%;
    top: 0;
    position: absolute;
    left: -1px;
    transition: all 0.4s;
    background: #000000;
}
.mainBanner ul li.active .bannerTitle button:hover{
    color: #ffffff;
}
.mainBanner ul li.active .bannerTitle button:hover:after{
    width: 102%;
    z-index: -1;
}

.mainBanner ul .b-item h2{
    color: #fff;
    position: absolute;
    font-family: 'BMDOHYEON';
    transform: rotate(270deg);
    transform-origin: center;
    width: max-content;
    text-align: start;
    font-size: 35px;
    letter-spacing: 1.8px;
}
.mainBanner ul .b-item img{
    height: 100%;
    object-fit: cover;
    opacity: 0.2;
}

.ytp-chrome-top{
    display: none;
}

@media screen and (max-width: 768px) {
    .mainBanner ul .b-item h2{
      font-size: 20px;
    }
    .mainBanner ul li.active .bannerTitle h2{
        font-size: 40px;
        max-width: 400px;
    }
  }