ul {
    padding: 0;
}

.section1 {
    background: #FFF;
    padding: 70px 0px 100px 0px;
}

.section1 .title {
    font-family: 'Noto Sans KR';
    font-style: normal;
    font-weight: 500;
    font-size: 50px;
    line-height: 70px;
    text-align: center;
    color: #333333;
    margin: 0 auto;
    margin-bottom: 50px;
}

.section1 .system {
    width: 950px;
    height: 820px;
    margin: 0 auto;
    background: url(http://www.kowinsblue.com/blue/templet/templet3/img/introduction1.png) no-repeat center center;
}

.section1 .system .depth1,
.section1 .system .depth2,
.section1 .system .depth3 {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.section1 .system .depth2 {
    flex-direction: row;
    gap: 70px;
    margin-bottom: 120px;
}

.section1 .system .depth1_1,
.section1 .system .depth2_1,
.section1 .system .depth3_1,
.section1 .system .depth3_2 {
    width: 270px;
    border-radius: 15px;
    font-family: 'Noto Sans KR';
    font-style: normal;
    display: flex;
    justify-content: center;
    align-items: center;
}

.section1 .system .depth1_1 {
    height: 120px;
    background: #0C417B;
    font-weight: 500;
    font-size: 26px;
    line-height: 48px;
    color: #FFFFFF;
    margin-bottom: 65px;
}

.section1 .system .depth2_1 {
    height: 80px;
    background: #5677CD;
    font-weight: 400;
    font-size: 24px;
    line-height: 48px;
    color: #FFFFFF;
}

.section1 .system .depth3_1 {
    height: 120px;
    background: #C1C9D2;
    font-weight: 500;
    font-size: 24px;
    line-height: 48px;
    color: #454545;
    margin-bottom: 30px;
}

.section1 .system .depth3_2 {
    height: 80px;
    background: #EFF2F4;
    font-weight: 400;
    font-size: 22px;
    line-height: 48px;
    color: #797979;
    margin-bottom: 20px;
}

@media (max-width: 1199px) {
    .section1 .system {
        width: 900px;
    }
}

@media (max-width: 991px) {
    .section1 .system {
        width: 550px;
        height: 690px;
        background-size: contain
    }
    .section1 .system .depth2 {
        gap: 70px;
        margin-bottom: 100px;
    }
    .section1 .system .depth1_1,
    .section1 .system .depth2_1,
    .section1 .system .depth3_1,
    .section1 .system .depth3_2 {
        width: 200px;
        border-radius: 15px;
    }
    .section1 .system .depth1_1 {
        height: 80px;
        font-size: 26px;
        line-height: 48px;
        margin-bottom: 85px;
    }
    .section1 .system .depth2_1 {
        height: 60px;
        font-size: 24px;
        line-height: 48px;
    }
    .section1 .system .depth3_1 {
        height: 80px;
        font-size: 24px;
        line-height: 48px;
        margin-bottom: 30px;
    }
    .section1 .system .depth3_2 {
        height: 60px;
        font-size: 22px;
        line-height: 48px;
        margin-bottom: 20px;
    }
}