.sub9_banner_img {
    background: url(https://www.etondental.co.kr/default/img/images/sub4_images/sub4_banner.jpg)
        25% 50% no-repeat !important;
}
.commu_nav ul li:nth-child(1):after {
    display: none;
}
.commu_nav ul li:nth-child(1):hover:after {
    display: none;
}
.commu_nav ul li:nth-child(1):hover {
    background: rgba(115, 51, 97, 0);
}
.commu_nav ul li:nth-child(1):hover a {
    color: #fff;
    background: rgba(115, 51, 97, 1);
}

.commu_nav ul li:nth-child(3):after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 100px;
    height: 3px;
    background: rgba(115, 51, 97, 1);
    transform: translateX(-50%);
}
.commu_nav ul li:nth-child(3):hover:after {
    animation: sub3_nav 0.5s forwards;
}
@keyframes sub3_nav {
    0% {
        width: 0px;
    }
    100% {
        width: 100px;
    }
}
.commu_nav ul li:nth-child(3):hover {
    background: rgba(115, 51, 97, 0);
}
.commu_nav ul li:nth-child(3):hover a {
    color: #333;
}
.container {
    width: 100%;
}
.m_con {
    display: none;
}
.pc_con {
    width: 100%;
    display: block;
}
@media screen and (max-width: 1023px) {
    .pc_con {
        display: none;
    }
    .m_con {
        width: 100%;
        display: block;
    }
}