/* 역사 페이지 전용 스타일 */
.history-container {
    position: relative;
    margin-top: 60px;
    padding: 30px 0;
}
.history-container::before {
    content: '';
    position: absolute;
    left: 25%;
    top: 0;
    width: 2px;
    height: 100%;
    background: rgba(255, 255, 255, 0.08);
    transform: translateX(-50%);
}
.history-block {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 80px;
    width: 100%;
    position: relative;
}
.history-block:nth-child(even) {
    flex-direction: row;
}
.history-block::after {
    content: '';
    position: absolute;
    left: 25%;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--blue-point);
    box-shadow: 0 0 10px var(--blue-point);
    border: 2px solid var(--main-dark);
    transform: translateX(-50%);
    z-index: 3;
}
.history-year-col {
    width: 25%;
    text-align: right;
    padding-right: 35px;
    position: relative;
    z-index: 2;
}
.history-year-col .year-text {
    font-size: 38px;
    font-weight: 800;
    color: var(--blue-point);
    line-height: 1;
    font-family: var(--font-main);
    letter-spacing: -1px;
}
.history-content-col {
    width: 75%;
    padding-left: 35px;
}
.history-detail-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.history-detail-list li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 20px;
    font-size: 16px;
    line-height: 1.6;
}
.history-detail-list li:last-child {
    margin-bottom: 0;
}
.history-detail-list .month {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    min-width: 40px;
    margin-right: 20px;
    position: relative;
    padding-top: 1px;
}
.history-detail-list .desc {
    color: var(--text-gray);
    flex: 1;
    font-weight: 400;
    word-break: keep-all;
}

/* 연도 범위 표기 (예: 2021~2018) */
.year-text .year-range {
    font-size: 28px;
    font-weight: 600;
    color: rgba(0, 123, 255, 0.6);
    letter-spacing: -1px;
}

/* 우측 콘텐츠 영역의 연도별 소제목 */
.year-sub-label {
    font-size: 18px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 12px;
    margin-top: 30px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    letter-spacing: -0.5px;
}
.year-sub-label:first-child,
.history-content-col > .year-sub-label:first-of-type {
    margin-top: 0;
}

@media (max-width: 768px) {
    .history-container::before {
        left: 20px;
    }
    .history-block {
        flex-direction: column;
        margin-bottom: 50px;
        padding-left: 40px;
    }
    .history-block:nth-child(even) {
        flex-direction: column;
    }
    .history-block::after {
        left: 20px;
        top: 10px;
    }
    .history-year-col {
        width: 100%;
        text-align: left;
        padding-right: 0;
        margin-bottom: 15px;
    }
    .history-year-col .year-text {
        font-size: 28px;
    }
    .history-content-col {
        width: 100%;
        padding-left: 0;
    }
    .history-detail-list li {
        font-size: 15px;
        margin-bottom: 15px;
    }
    .history-detail-list .month {
        min-width: 30px;
        margin-right: 15px;
    }
    .year-text .year-range {
        font-size: 20px;
    }
    .year-sub-label {
        font-size: 16px;
        margin-top: 20px;
    }
}