/* sub_intro */
.sub_intro{
    height: 309px;
    margin-top: 110px;
    background-image: url(../img/sub_bg.webp);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}
.sub_intro .center{
    height: 100%;
    position: relative;
}
.sub_title{
    gap: 25px 0;
}
.sub_title p:first-child{
    letter-spacing: .5rem;
}
.sub_nav{
    position: absolute;
    left: 0;
    bottom: 10%;
    gap: 0 10px;
}

/* sub1 */
.s1_con1{
    padding: 180px 0 280px;
    position: relative;
}
.s1_con1_txt{
    gap: 60px 0;
}
.s1_con1_txt .line{
    background-color: #192d49;
    width: 64px;
    height: 3px;
}
.s1_con1_bg1{
    position: absolute;
    z-index: -1;
    right: 0;
    bottom: -30%;
}
.s1_con1_bg1 img{
    width: 100%;
}
.s1_con1_bg2{
    position: absolute;
    right: 5%;
    bottom: -8%;
    z-index: 99;
}
.s1_con1_bg2 img{
    width: 100%;
}
.s1_con2{
    font-size: 0;
    position: relative;
    overflow: hidden;
    height: 724px;
}
.s1_con2>img{
    width: 100%;
    height: 100%;
    object-fit: cover; 
    animation: zoomInOut 7s ease-in-out infinite; 
    transform-origin: center center;
}
@keyframes zoomInOut {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1); /* 살짝 확대 */
  }
  100% {
    transform: scale(1);
  }
}

/* sub2 */
.sub2{
    padding-bottom: 155px;
}

/* sub3 */
.sub3{
    padding: 110px 0 155px;
    position: relative;
}
.s3_bg {
    position: absolute;
    z-index: -1;
}
.s3_bg1{
    right: 0;
    top: 5%;
}
.s3_bg2{
    left: 0;
    top: 32%;
}
.s3_bg3{
    right: 0;
    top: 70%;
}
.s3_bg img{
    width: 100%;
}
.s3_con{
    gap: 100px 0;
    margin-top: 85px;
}
.s3_con li{
    gap: 35px 0;
}
.s3_con .imgs {
    width: 100%;
}
.s3_con .imgs img{
    width: 100%;
}
.s3_con .txts{
    gap: 0 50px;
}
.s3_con .line{
    width: 2px;
    height: 46px;
    background-color: #30496d;
}

/* sub4 */
.sub4{
    padding-top: 110px;
}

/* mobile */ 
@media screen and (max-width: 767px){ 
    .sub_intro {
        margin-top: 80px;
    }   
    .sub_title {
        gap: 15px 0;
    }
    .sub_nav{
        gap: 0 5px;
    }

    /* sub1 */
    .s1_con1 {
        padding: 100px 0 150px;
    }
    .s1_con1 .center1{
        flex-direction: column;
        gap: 50px 0;
    }
    .s1_con1_txt {
        gap: 30px 0;
    }
    .s1_con1_bg2 {
        bottom: 0;
    }
    .s1_con2{ 
        height: 200px;
    }

    /* sub3 */
    .s3_con{
        gap: 50px 0;
        margin-top: 45px;
    }
    .s3_con li {
        gap: 20px 0;
    }
    .s3_con .txts{
        flex-direction: column;
        gap: 10px 0;
    }
    .s3_con .line{
        display: none;
    }
}

/* tablet */
@media screen and (min-width: 768px) and (max-width: 1024px){
    
    .sub_title {
        gap: 20px 0;
    }
    
    /* sub1 */
    .s1_con1 {
        padding: 110px 0 100px;
    }
    .s1_con1 .center1{
        flex-direction: column;
        gap: 55px 0;
        align-items: flex-start;
    }
    .s1_con1_txt {
        gap: 38px 0;
    }
    .s1_con1_bg2 {
        position: unset;
        margin-top: 50px;
    } 
    .s1_con2{ 
        height: 500px;
    }

    /* sub3 */
    .s3_con{
        gap: 70px 0;
        margin-top: 55px;
    }
    .s3_con li {
        gap: 25px 0;
    }
    .s3_con .txts{
        flex-direction: column;
        gap: 15px 0;
    }
    .s3_con .line{
        display: none;
    }

}