/* 时间线页面基础样式 */
.timeline-page {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

/* 标题区域 */
.timeline-header {
    text-align: center;
    margin-bottom: 50px;
}
.timeline-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--body-font-color);
}
.timeline-subtitle {
    font-size: 16px;
    color: var(--secondary-color);
    margin: 0;
}

/* 页面描述 */
.timeline-desc {
    margin-bottom: 60px;
    line-height: 1.8;
    font-size: 15px;
    color: var(--body-font-color);
}

/* 时间线容器 */
.timeline-wrapper {
    position: relative;
    padding-left: 40px;
}
/* 时间线竖线 */
.timeline-wrapper::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--theme-color);
    opacity: 0.3;
}

/* 时间线单项 */
.timeline-item {
    position: relative;
    margin-bottom: 50px;
    display: flex;
    align-items: flex-start;
    gap: 30px;
}

/* 时间节点圆点 */
.timeline-dot {
    position: absolute;
    left: -41px;
    top: 0;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--theme-color);
    z-index: 1;
}

/* 年份 */
.timeline-year {
    min-width: 100px;
    font-size: 20px;
    font-weight: 600;
    color: var(--theme-color);
    padding-top: 2px;
}

/* 内容卡片 */
.timeline-content {
    flex: 1;
    background: #fff;
    padding: 20px 25px;
    border-radius: 12px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    border: 1px solid rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}
.timeline-content:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

/* 内容标题 */
.timeline-item-title {
    font-size: 18px;
    font-weight: 600;
    margin: 0 0 10px 0;
    color: var(--body-font-color);
}
/* 内容描述 */
.timeline-item-desc {
    font-size: 15px;
    line-height: 1.7;
    color: var(--secondary-color);
    margin: 0;
}

/* 响应式适配 */
@media (max-width: 768px) {
    .timeline-wrapper {
        padding-left: 30px;
    }
    .timeline-item {
        flex-direction: column;
        gap: 10px;
    }
    .timeline-year {
        font-size: 18px;
    }
    .timeline-content {
        padding: 18px 20px;
    }
}