/* 专利事件时间轴样式 - 优化版 */

.patent-timeline-container {
    padding: 25px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 10%, #f5f7fa 100%);
    border-radius: 12px;
    margin: 25px 0;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.patent-timeline {
    position: relative;
    padding: 30px 0;
    margin: 0 auto;
    max-width: 900px;
}

/* 时间轴主线 - 增强渐变效果 */
.patent-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(to bottom, 
        #4a6cf7 0%, 
        #667eea 25%, 
        #764ba2 50%, 
        #667eea 75%, 
        #4a6cf7 100%
    );
    transform: translateX(-50%);
    border-radius: 2px;
    box-shadow: 0 0 10px rgba(74, 108, 247, 0.3);
}

/* 时间轴事件项 */
.timeline-event {
    position: relative;
    margin-bottom: 50px;
    display: flex;
    align-items: center;
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 左侧事件（偶数） */
.timeline-event:nth-child(even) {
    flex-direction: row-reverse;
}

/* 事件内容卡片 - 增强设计 */
.timeline-event-content {
    width: 45%;
    padding: 20px 24px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    border-left: 4px solid #4a6cf7;
}

.timeline-event:nth-child(even) .timeline-event-content {
    border-left: none;
    border-right: 4px solid #4a6cf7;
}

.timeline-event-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #4a6cf7, #667eea, #764ba2);
    border-radius: 12px 12px 0 0;
}

.timeline-event-content:hover {
    box-shadow: 0 8px 24px rgba(74, 108, 247, 0.25);
    transform: translateY(-4px) scale(1.02);
    border-left-color: #667eea;
}

.timeline-event:nth-child(even) .timeline-event-content:hover {
    border-right-color: #667eea;
}

/* 事件日期 - 增强样式 */
.timeline-event-date {
    font-size: 15px;
    font-weight: 700;
    color: #4a6cf7;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.3px;
}

.timeline-event-date svg {
    width: 16px;
    height: 16px;
    opacity: 0.8;
}

/* 事件标题 - 增强可读性 */
.timeline-event-title {
    font-size: 17px;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 8px;
    line-height: 1.4;
}

/* 事件代码 - 更现代的设计 */
.timeline-event-code {
    display: inline-block;
    padding: 4px 12px;
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    color: #1565c0;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 10px;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 4px rgba(21, 101, 192, 0.1);
}

/* 事件描述 - 改进排版 */
.timeline-event-description {
    font-size: 14px;
    color: #555;
    line-height: 1.7;
}

/* 时间轴节点 - 增强视觉效果 */
.timeline-event-node {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 18px;
    height: 18px;
    background: white;
    border: 4px solid #4a6cf7;
    border-radius: 50%;
    z-index: 2;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 0 4px rgba(74, 108, 247, 0.15);
}

.timeline-event:hover .timeline-event-node {
    width: 24px;
    height: 24px;
    border-width: 5px;
    box-shadow: 0 0 0 8px rgba(74, 108, 247, 0.25), 0 0 20px rgba(74, 108, 247, 0.4);
    border-color: #667eea;
}

/* 特殊事件节点 - 关键事件高亮 */
.timeline-event.critical .timeline-event-node {
    background: linear-gradient(135deg, #4a6cf7 0%, #667eea 100%);
    border-color: #4a6cf7;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 4px rgba(74, 108, 247, 0.15);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(74, 108, 247, 0.3);
    }
}

.timeline-event.critical .timeline-event-code {
    background: linear-gradient(135deg, #4a6cf7 0%, #667eea 100%);
    color: white;
}

.timeline-event.critical .timeline-event-content {
    border-left-color: #667eea;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9ff 100%);
}

.timeline-event.critical:nth-child(even) .timeline-event-content {
    border-right-color: #667eea;
}

/* 连接线 - 更流畅的连接 */
.timeline-event-connector {
    position: absolute;
    top: 50%;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #4a6cf7, #667eea);
    border-radius: 2px;
}

/* 奇数项：内容在左侧，连接线从节点向左延伸 */
.timeline-event:nth-child(odd) .timeline-event-connector {
    right: 50%;
    left: auto;
    transform: translateX(-9px);
    background: linear-gradient(90deg, #667eea, #4a6cf7);
}

/* 偶数项：内容在右侧，连接线从节点向右延伸 */
.timeline-event:nth-child(even) .timeline-event-connector {
    left: 50%;
    right: auto;
    transform: translateX(9px);
}

/* 响应式设计 - 移动端优化 */
@media (max-width: 768px) {
    .patent-timeline-container {
        padding: 20px 15px;
    }
    
    .patent-timeline::before {
        left: 25px;
    }
    
    .timeline-event {
        flex-direction: row !important;
        padding-left: 60px;
        margin-bottom: 35px;
    }
    
    .timeline-event-content {
        width: 100%;
        border-left: 4px solid #4a6cf7 !important;
        border-right: none !important;
    }
    
    .timeline-event-node {
        left: 25px;
    }
    
    .timeline-event-connector {
        left: 25px;
        width: 35px;
        transform: translateX(9px) !important;
    }
}

/* 打印样式 */
@media print {
    .patent-timeline-container {
        background: white;
        box-shadow: none;
    }
    
    .timeline-event-content {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    .timeline-event-content:hover {
        transform: none;
    }
}