/* 视频背景区域 */
.video-hero {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

#hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translateX(-50%) translateY(-50%);
    object-fit: cover;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    text-align: center;
}

.video-overlay::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent 0%, rgba(0,0,0,0.6) 100%);
    z-index: 1;
}

.video-overlay h1, .video-overlay p {
    position: relative;
    z-index: 2;
}

.video-overlay h1 {
    font-size: 3.5rem;
    font-weight: 600;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    margin-bottom: 2rem;
    background: linear-gradient(45deg, #fff, #f0f0f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.3);
}

.video-overlay p {
    font-size: 1.8rem;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
    letter-spacing: 3px;
    background: linear-gradient(45deg, #fff, #f0f0f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 时间轴区域 */
.timeline-section {
    padding: 6rem 2rem;
    background: #f8f5f2;
    min-height: 100vh;
}

.section-title {
    text-align: center;
    font-size: 2.8rem;
    margin-bottom: 4rem;
    color: #8b4513;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(to right, transparent, #8b4513, transparent);
}

.timeline {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.timeline-item {
    display: flex;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    margin-bottom: 3rem;
    border: none;
}

.timeline-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.timeline-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: linear-gradient(to bottom, #8b4513, #d2691e);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.timeline-item:hover::before {
    opacity: 1;
}

.timeline-image {
    flex: 0 0 40%;
    position: relative;
    overflow: hidden;
}

.timeline-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.timeline-item:hover .timeline-image img {
    transform: scale(1.1);
}

.timeline-content {
    flex: 1;
    padding: 2.5rem;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.timeline-era {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: #8b4513;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    transform: translateY(-50%);
    box-shadow: 0 5px 15px rgba(139, 69, 19, 0.2);
    font-weight: 500;
    letter-spacing: 1px;
}

.timeline-content h3 {
    color: #8b4513;
    font-size: 2rem;
    margin-bottom: 1rem;
    position: relative;
}

.timeline-content p {
    color: #666;
    line-height: 1.8;
    font-size: 1.1rem;
    margin: 0;
}

/* 交错布局 */
.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-item:nth-child(even)::before {
    left: auto;
    right: 0;
}

.timeline-item:nth-child(even) .timeline-era {
    right: auto;
    left: 1rem;
}

/* 动画效果 */
.timeline-item {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.timeline-item.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 响应式调整 */
@media (max-width: 992px) {
    .timeline-item,
    .timeline-item:nth-child(even) {
        flex-direction: column;
    }

    .timeline-image {
        flex: 0 0 200px;
    }

    .timeline-era {
        top: 1rem;
        right: 1rem;
        transform: none;
    }

    .timeline-item:nth-child(even) .timeline-era {
        left: auto;
        right: 1rem;
    }

    .timeline-content {
        padding: 1.5rem;
    }

    .timeline-content h3 {
        font-size: 1.5rem;
    }

    .timeline-content p {
        font-size: 1rem;
    }
}

@media (max-width: 576px) {
    .timeline-section {
        padding: 2rem 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .timeline {
        padding: 1rem;
    }

    .timeline-image {
        flex: 0 0 150px;
    }

    .timeline-content {
        padding: 1rem;
    }
}

/* 添加滚动显示动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.timeline-item.animate {
    animation: fadeInUp 0.6s ease forwards;
}

/* 文化遗产区域 */
.heritage-section {
    padding: 4rem 2rem;
    background: #f8f5f2;
}

.heritage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

.heritage-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 6px 15px rgba(139, 69, 19, 0.08);
    transition: all 0.3s ease;
    border: 1px solid rgba(139, 69, 19, 0.1);
    height: 100%;
}

.heritage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, rgba(139, 69, 19, 0.8), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1;
}

.heritage-card:hover::before {
    opacity: 1;
}

.heritage-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 25px rgba(139, 69, 19, 0.12);
}

.heritage-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.heritage-card:hover img {
    transform: scale(1.05);
}

.heritage-content {
    padding: 1.2rem 1.5rem;
    background: rgba(255, 255, 255, 0.98);
}

.heritage-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.6rem;
    color: var(--primary-color);
    font-weight: 600;
}

.heritage-content p {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-light);
    margin-bottom: 0;
}

/* 响应式优化 */
@media (max-width: 1200px) {
    .heritage-grid {
        grid-template-columns: repeat(2, 1fr);
        padding: 1rem;
    }
}

@media (max-width: 768px) {
    .heritage-section {
        padding: 3rem 1rem;
    }
    
    .heritage-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .heritage-card img {
        height: 180px;
    }
    
    .heritage-content {
        padding: 1rem 1.2rem;
    }
    
    .heritage-content h3 {
        font-size: 1.3rem;
    }
}

/* 动画效果 */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes shine {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }
    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .video-overlay h1 {
        font-size: 2.5rem;
    }
    
    .video-overlay p {
        font-size: 1.2rem;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-dot {
        left: 30px;
    }
    
    .timeline-content {
        width: calc(100% - 60px);
        margin-left: 60px !important;
        transform: none !important;
    }

    .timeline-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .timeline-content::before {
        display: none;
    }

    .heritage-grid {
        grid-template-columns: 1fr;
    }
}

/* 添加新的交互效果 */
.heritage-card:hover .heritage-content {
    transform: translateY(-10px);
    transition: transform 0.3s ease;
}

/* 统一配色方案 */
:root {
    --primary-color: #8b4513;
    --secondary-color: #d2691e;
    --background-light: #f8f5f2;
    --text-dark: #333;
    --text-light: #666;
}

.section-title {
    color: var(--primary-color);
    font-size: 2.8rem;
    margin-bottom: 4rem;
}

/* 响应式优化 */
@media (max-width: 768px) {
    .timeline-section,
    .heritage-section {
        padding: 4rem 1rem;
    }
    
    .timeline-item {
        margin-bottom: 2rem;
    }
    
    .heritage-grid {
        gap: 1.5rem;
    }
    
    .section-title {
        font-size: 2.2rem;
        margin-bottom: 3rem;
    }
}

/* 添加平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 优化动画效果 */
.timeline-item {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.timeline-item.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 添加图片悬停效果 */
.heritage-card img {
    transition: transform 0.5s ease;
}

.heritage-card:hover img {
    transform: scale(1.05);
}