/* 图片库基础样式 */
.photo-gallery {
    padding: 2rem 0;
    max-width: 1200px;
    margin: 0 auto;
}

/* 过滤按钮样式 */
.gallery-filter {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.gallery-filter button {
    padding: 0.5rem 1.5rem;
    border: 1px solid #ddd;
    background-color: #fff;
    color: #333;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    font-weight: 500;
}

.gallery-filter button:hover {
    background-color: #f8f9fa;
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.gallery-filter button.active {
    background-color: #007bff;
    color: white;
    border-color: #007bff;
    box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
}

/* 图片网格布局 */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

/* 图片项样式 */
.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    opacity: 0;
    transform: scale(0.9);
    animation: fadeInUp 0.5s ease forwards;
}

.gallery-item:nth-child(1) { animation-delay: 0.05s; }
.gallery-item:nth-child(2) { animation-delay: 0.1s; }
.gallery-item:nth-child(3) { animation-delay: 0.15s; }
.gallery-item:nth-child(4) { animation-delay: 0.2s; }
.gallery-item:nth-child(5) { animation-delay: 0.25s; }
.gallery-item:nth-child(6) { animation-delay: 0.3s; }
.gallery-item:nth-child(7) { animation-delay: 0.35s; }
.gallery-item:nth-child(8) { animation-delay: 0.4s; }
.gallery-item:nth-child(9) { animation-delay: 0.45s; }

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

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.gallery-item-inner {
    position: relative;
    padding-top: 75%; /* 4:3 比例 */
    overflow: hidden;
}

.gallery-item img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.gallery-item:hover img {
    transform: scale(1.05);
}

/* 图片覆盖层 */
.gallery-item-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    color: white;
    padding: 1.5rem 1rem 1rem;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
}

.gallery-item:hover .gallery-item-overlay {
    opacity: 1;
    transform: translateY(0);
}

.gallery-item-caption {
    font-size: 0.95rem;
    font-weight: 500;
    margin: 0;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.8);
}

/* 加载状态 */
.gallery-item-loading::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    z-index: 1;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* 错误状态 */
.gallery-item-error {
    background-color: #f8d7da;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #721c24;
}

.gallery-item-error::after {
    content: '图片加载失败';
    padding: 1rem;
    text-align: center;
}

/* 图片轮播样式 */
.image-slider {
    position: relative;
    max-width: 100%;
    overflow: hidden;
    border-radius: 12px;
    margin: 2rem 0;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.slider-container {
    position: relative;
    height: 500px;
}

.slider-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.slider-slide.active {
    opacity: 1;
    z-index: 1;
}

.slider-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slide-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    color: white;
    padding: 2rem;
    font-size: 1.25rem;
    font-weight: 500;
}

/* 轮播导航按钮 */
.slider-prev,
.slider-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(255, 255, 255, 0.8);
    color: #333;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slider-prev {
    left: 1rem;
}

.slider-next {
    right: 1rem;
}

.slider-prev:hover,
.slider-next:hover {
    background-color: white;
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* 轮播指示器 */
.slider-dots {
    position: absolute;
    bottom: 1.5rem;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    z-index: 10;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: none;
    background-color: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

.slider-dot.active {
    background-color: white;
    transform: scale(1.2);
}

.slider-dot:hover:not(.active) {
    background-color: rgba(255, 255, 255, 0.8);
}

/* 图片查看器样式 */
.image-viewer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.image-viewer.active {
    opacity: 1;
    visibility: visible;
}

.viewer-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
}

.viewer-image {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.viewer-close {
    position: absolute;
    top: -40px;
    right: 0;
    color: white;
    font-size: 2.5rem;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.viewer-close:hover {
    transform: scale(1.1);
}

.viewer-prev,
.viewer-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(255, 255, 255, 0.8);
    color: #333;
    border: none;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    font-size: 2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.viewer-prev {
    left: -70px;
}

.viewer-next {
    right: -70px;
}

.viewer-prev:hover,
.viewer-next:hover {
    background-color: white;
    transform: translateY(-50%) scale(1.1);
}

.viewer-caption {
    position: absolute;
    bottom: -30px;
    left: 0;
    right: 0;
    color: white;
    text-align: center;
    font-size: 1rem;
    font-weight: 500;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 1rem;
    }
    
    .gallery-filter {
        flex-direction: column;
        align-items: center;
    }
    
    .gallery-filter button {
        width: 80%;
        margin-bottom: 0.5rem;
    }
    
    .slider-container {
        height: 300px;
    }
    
    .slide-caption {
        font-size: 1rem;
        padding: 1rem;
    }
    
    .slider-prev,
    .slider-next {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
    }
    
    .viewer-prev,
    .viewer-next {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
        left: 0;
        right: 0;
    }
    
    .viewer-prev {
        left: 10px;
    }
    
    .viewer-next {
        right: 10px;
    }
    
    .viewer-close {
        top: -30px;
        font-size: 2rem;
    }
    
    .viewer-caption {
        font-size: 0.9rem;
        bottom: -25px;
    }
}

@media (max-width: 480px) {
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .slider-container {
        height: 250px;
    }
    
    .gallery-item-overlay {
        padding: 1rem 0.75rem 0.75rem;
    }
    
    .gallery-item-caption {
        font-size: 0.85rem;
    }
}

/* 打印样式 */
@media print {
    .gallery-filter,
    .slider-prev,
    .slider-next,
    .slider-dots,
    .image-viewer {
        display: none !important;
    }
    
    .gallery-item,
    .slider-slide {
        break-inside: avoid;
        margin-bottom: 1rem;
    }
}