/* ===================== 纵向时间轴核心样式 ===================== */

/* CSS变量定义 */
:root {
    --timeline-line-color: #809A6F;
    --timeline-marker-color: #5A7A4F;
    --timeline-content-bg: #F5F8F2;
    --timeline-border-color: #A8C090;
    --timeline-text-color: #2C3E2A;
    --timeline-hover-color: #D4E6C3;
    --timeline-expanded-bg: #FFFFFF;
    --timeline-shadow: 0 4px 20px rgba(128, 154, 111, 0.15);
}

/* 深色模式变量 */
html.dark {
    --timeline-line-color: #A8C090;
    --timeline-marker-color: #809A6F;
    --timeline-content-bg: #0B0020;
    --timeline-border-color: #5A7A4F;
    --timeline-text-color: #FFFFFF;
    --timeline-hover-color: #3B1682;
    --timeline-expanded-bg: #231442;
    --timeline-shadow: 0 4px 20px rgba(168, 192, 144, 0.2);
}

/* 时间轴容器 */
.timeline-section {
    position: relative;
    padding: 4rem 0;
    background: none;
    height: auto;
    overflow: visible;
}

.timeline-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    overflow-x: hidden;
    overflow-y: auto;
    background: none;
    position: relative;
    height: auto;
    box-sizing: border-box;
}

/* 时间轴线条 */
.timeline-container::before {
    content: '';
    position: absolute;
    left: 80px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--timeline-line-color) 0%, var(--timeline-border-color) 50%, var(--timeline-line-color) 100%);
    border-radius: 2px;
    z-index: 1;
    transition: left 0.7s;
}

@media (max-width: 768px) {
    .timeline-container::before {
        left: 50%;
        transform: translateX(-50%);
    }
}

/* 时间轴项目 */
.timeline-item {
    position: relative;
    margin-bottom: 2.5rem;
    width: 100%;
    opacity: 1;
    transform: translateY(0);
    font-size: 1.05rem;
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    justify-content: center;
}

@media (max-width: 768px) {
    .timeline-item {
        flex-direction: column;
        align-items: center;
    }
}

/* 时间点标记 */
.timeline-marker {
    position: absolute;
    left: 80px;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    background: var(--timeline-marker-color);
    border: 4px solid #fff;
    border-radius: 50%;
    z-index: 3;
    transition: box-shadow 0.7s, background 0.7s, border 0.7s, left 0.7s;
    box-shadow: none;
}

@media (max-width: 768px) {
    .timeline-marker {
        left: 50%;
        transform: translate(-50%, -50%);
    }
}

.timeline-item.expanded .timeline-marker,
.timeline-item.active .timeline-marker,
.timeline-item:hover .timeline-marker {
    background: #2C3E2A;
    border: 4px solid #A8C090;
    box-shadow: 0 0 0 8px rgba(128,154,111,0.18), 0 0 12px 2px #A8C090;
}

/* 内容区域 */
.timeline-content {
    position: relative;
    margin-left: 100px;
    background: #fff;
    border-radius: 16px;
    padding: 1rem 2rem;
    box-shadow: 0 4px 24px rgba(128,154,111,0.10);
    border: none;
    width: calc(100% - 120px);
    min-height: 80px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    transition: padding 0.7s, width 0.7s, box-shadow 0.7s, background 0.7s, margin-left 0.7s, min-height 0.7s;
    overflow: hidden;
}

@media (max-width: 768px) {
    .timeline-content {
        margin-left: 0;
        margin-top: 60px;
        width: 100%;
        text-align: center;
        transition: margin-left 0.7s, margin-top 0.7s, width 0.7s, min-height 0.7s;
    }
}

.timeline-item.expanded .timeline-content,
.timeline-item.active .timeline-content {
    box-shadow: 0 8px 32px rgba(128,154,111,0.18);
    background: #f8fbf4;
    min-height: 240px;
    padding: 2rem 2.5rem;
}

/* 头部区域 */
.timeline-header {
    display: grid;
    grid-template-columns: 120px auto;
    align-items: center;
    width: 100%;
    margin-bottom: 0.2rem;
    transition: margin-bottom 0.7s;
    gap: 0;
}

.timeline-item.expanded .timeline-header,
.timeline-item.active .timeline-header,
.timeline-item:hover .timeline-header {
    margin-bottom: 0.5rem;
}

/* 时间标签 - 纯文本，无背景、无边框、无箭头 */
.timeline-date {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--timeline-marker-color);
    font-family: inherit;
    background: none !important;
    padding: 0 !important;
    border-radius: 0 !important;
    border: none !important;
    box-shadow: none !important;
    white-space: nowrap;
    transition: color 0.7s;
    justify-self: start;
}

.timeline-date::after,
.timeline-date::before {
    display: none !important;
    content: none !important;
}

/* 标题 */
.timeline-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--timeline-text-color);
    font-family: inherit;
    margin: 0;
    line-height: 1.4;
    text-align: left;
    transition: color 0.7s;
    justify-self: start;
}

.timeline-item.expanded .timeline-title,
.timeline-item.active .timeline-title,
.timeline-item:hover .timeline-title {
    color: var(--timeline-marker-color);
}

/* 详细内容区域 */
.timeline-details {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.7s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.7s;
    margin-top: 0;
    padding-top: 0;
    border-top: none;
    width: 100%;
}

.timeline-item.expanded .timeline-details,
.timeline-item.active .timeline-details,
.timeline-item:hover .timeline-details {
    max-height: 800px;
    opacity: 1;
    margin-top: 1.2rem;
    padding-top: 0;
    border-top: none;
    width: 98%;
}

.timeline-details-text {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--timeline-text-color);
    margin: 0;
    opacity: 0.95;
    transition: color 0.7s;
}

.timeline-item:not(.expanded):not(.active):not(:hover) .timeline-content {
    padding: 1rem 2rem;
    min-height: 60px;
}

/* 动画效果 */
.timeline-item.scroll-animate {
    animation: timelineSlideIn 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes timelineSlideIn {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.timeline-item.expand-animate .timeline-content {
    animation: timelineExpand 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes timelineExpand {
    from {
        transform: scale(0.95);
        opacity: 0.8;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .timeline-container {
        padding: 0 1.5rem;
    }
}

@media (max-width: 992px) {
    .timeline-container {
        padding: 0 1rem;
    }
    
    .timeline-content {
        padding: 1.25rem;
    }
    
    .timeline-item.expanded .timeline-content {
        padding: 1.75rem;
    }
}

@media (max-width: 576px) {
    .timeline-section {
        padding: 2rem 0;
    }
    
    .timeline-container {
        padding: 0 0.5rem;
    }
    
    .timeline-content {
        padding: 1rem;
        margin-top: 50px;
    }
    
    .timeline-item.expanded .timeline-content {
        padding: 1.5rem;
    }
    
    .timeline-title {
        font-size: 1.1rem;
    }
    
    .timeline-item.expanded .timeline-title {
        font-size: 1.25rem;
    }
}

/* 无障碍支持 */
.timeline-item:focus-within .timeline-content {
    outline: 2px solid var(--timeline-marker-color);
    outline-offset: 2px;
}

/* 滚动条样式 */
.timeline-container::-webkit-scrollbar {
    width: 8px;
    background: #f5f8f2;
}

.timeline-container::-webkit-scrollbar-thumb {
    background: #c8d8c0;
    border-radius: 4px;
}

/* 打印样式 */
@media print {
    .timeline-container::before {
        display: none;
    }
    
    .timeline-marker {
        display: none;
    }
    
    .timeline-content {
        margin-left: 0;
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    .timeline-item.expanded .timeline-details {
        max-height: none;
        opacity: 1;
    }
}

/* ===================== 新两栏布局 ===================== */
.timeline-flex-layout {
    display: flex;
    flex-direction: row;
    align-items: stretch;
    gap: 0;
    width: 100%;
}
.timeline-axis {
    position: relative;
    width: 60px;
    min-width: 60px;
}
.timeline-line {
    position: absolute;
    left: 50%;
    top: 20px;
    bottom: 20px;
    width: 4px;
    background: linear-gradient(to bottom, var(--timeline-line-color) 0%, var(--timeline-border-color) 50%, var(--timeline-line-color) 100%);
    border-radius: 2px;
    transform: translateX(-50%);
    z-index: 0;
}
.timeline-list {
    list-style: none;
    padding: 0;
    margin: 0;
    width: 100%;
    height: 100%;
    position: relative;
    overflow: visible;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}
.timeline-item-point {
    position: relative;
    min-height: 72px;
    display: flex;
    align-items: center;
    z-index: 1;
}
.timeline-item-point .point-marker {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 18px;
    height: 18px;
    min-width: 18px;
    min-height: 18px;
    max-width: 18px;
    max-height: 18px;
    background: var(--timeline-marker-color);
    border: 4px solid #fff;
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(128,154,111,0.10);
    transition: box-shadow 0.3s, background 0.3s, border 0.3s;
    box-sizing: content-box;
    line-height: 18px;
    display: block;
    z-index: 2;
}
.timeline-item-point .point-label {
    font-size: 1.08rem;
    font-weight: 600;
    color: var(--timeline-marker-color);
    background: none;
    padding: 0 0 0 0;
    border-radius: 0;
    white-space: nowrap;
    margin-top: 0;
    transition: color 0.3s;
    text-align: left;
    position: relative;
    z-index: 2;
    line-height: 18px;
    margin-left: 44px;
}
.timeline-item-point.active .point-label,
.timeline-item-point:hover .point-label {
    color: #2C3E2A;
}
.timeline-item-point.active .point-marker,
.timeline-item-point:hover .point-marker {
    background: #2C3E2A;
    border: 4px solid #A8C090;
    box-shadow: 0 0 0 8px rgba(128,154,111,0.18), 0 0 12px 2px #A8C090;
}
.point-marker:before {
    content: none !important;
}
.point-marker svg {
    display: block;
    margin: auto;
    width: 18px;
    height: 18px;
}

/* 右侧单卡片内容区 */
.timeline-card-container {
    flex: 1 1 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    min-width: 0;
    width: 100%;
    height: 100%;
    justify-content: center;
    margin-left: 48px;
}
.timeline-card {
    background: var(--timeline-content-bg);
    border-radius: 20px;
    box-shadow: 0 6px 32px rgba(128,154,111,0.10);
    padding: 2.2rem 2.8rem 2.2rem 2.8rem;
    min-height: 340px;
    width: 100%;
    max-width: 700px;
    margin: 0 auto;
    transition: all 0.5s;
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
    opacity: 1;
    animation: fadeInCard 0.5s;
    height: 100%;
    justify-content: center;
}
.timeline-card-date {
    font-size: 1.08rem;
    color: var(--timeline-marker-color);
    margin-bottom: 0.2rem;
    font-weight: 500;
}
.timeline-card-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--timeline-text-color);
    margin-bottom: 0.3rem;
}
.timeline-card-desc {
    font-size: 1.13rem;
    color: var(--timeline-text-color);
    margin-bottom: 0.3rem;
}
.timeline-card-details {
    font-size: 1.02rem;
    color: #888;
}
@keyframes fadeInCard {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 响应式：移动端横向时间轴 */
@media (max-width: 768px) {
    .timeline-flex-layout {
        flex-direction: column;
        gap: 24px;
        align-items: stretch;
    }
    .timeline-axis {
        flex-direction: row;
        min-width: 0;
        width: 100%;
        overflow-x: auto;
        padding-bottom: 12px;
        align-items: flex-start;
        height: auto;
        padding-top: 0;
    }
    .timeline-list {
        display: flex;
        flex-direction: row;
        width: 100%;
        justify-content: flex-start;
        align-items: center;
        height: auto;
    }
    .timeline-list::before {
        left: 0;
        top: 20px;
        bottom: 20px;
        right: 0;
        height: 4px;
        width: 100%;
        background: linear-gradient(to right, var(--timeline-line-color) 0%, var(--timeline-border-color) 50%, var(--timeline-line-color) 100%);
        transform: translateY(0);
    }
    .timeline-item-point {
        flex-direction: column;
        margin: 0 24px 0 0;
        align-items: center;
        padding-left: 0;
    }
    .timeline-card-container, .timeline-card {
        height: auto;
        margin-left: 0;
        max-width: 100%;
        padding: 1.2rem 0.7rem;
    }
}