.sub-top-bn{
    height:300px;
    position:relative;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    width:100%;
    overflow: hidden;
}
.sub-top-bn::before{
    content:"";
    position:absolute;
    display: block;
    background-image: url(../zento_img/history.jpg);
    background-position: 50% 64.5%;
    background-repeat: no-repeat;
    background-size: cover;
    width:100%;
    height: 100%;
    transform:scale(120%);

}
.sub-top-bn.start::before{
  transform:scale(100%);
  transition: transform 1.5s;
}
.sub-top-bn::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #011A47;
    opacity: 0.3;
    padding-left: 100px;
    padding-right: 100px;
}
.sub-top-bn > .sub-top-bn-text{
    position:absolute;
    top:50%;
    left: 50%;
    transform:translateX(-50%);
    font-size: 2rem;
    font-weight: 400;
    color:white;
    z-index: 1;
}

/* 페이지 타이틀 */
.sub-page-title{
    padding:80px 100px 20px;
}
.sub-page-title > .channel{
    font-size: 1.2rem;
}
.sub-page-title > .title{
    font-size: 2rem;
    padding:5px;
    font-weight: 600;
}

/* 회사 연혁 시작 */
.history{
    padding:0px 100px 100px;
    font-size: 1.2rem;
}
.history > .history-box > .history-item > .year{
    width:283px;
    font-size: 2rem;
    border-top:2px solid #125FEF;
    box-sizing: border-box;
    padding:35px 0;
    font-weight: 600;
}
.history > .history-box > .history-item > .achievement{
    width:calc(100% - 303px);
    padding:20px 0;
    border-top:2px solid #d7d7d7;
}

.history > .history-box > .history-item > .achievement > p{
    padding-left: 20px;
    position:relative;
}

.history > .history-box > .history-item > .achievement > p::after{
    content:"";
    position:absolute;
    width:3px;
    height:3px;
    border-radius: 50%;
    background-color: #000;
    top:50%;
    left: 0;
    transform:translateY(-50%);
    
}
@media screen and (max-width:1000px){
    .sub-top-bn > .sub-top-bn-text{
        transform:translateX(-50%) translateY(0%);
        }
        .history > .history-box > .history-item{
            display: block;
        }
        .history > .history-box > .history-item > .year{
            width:100%;
            box-sizing: border-box;
            padding: 35px 0 15px;
        }
        .history > .history-box > .history-item >.achievement{
            width:100%;
            border-top:none;
            padding-top: 0;
        }
}

@media screen and (max-width:700px){
    .sub-top-bn{
        height:200px;
    }
    .history{
        padding:50px 30px;
    }
    .sub-page-title{
        padding-left: 30px;
    }
}
@media screen and (max-width:500px){
    .sub-top-bn{
        display: none;
    }
}