/* 摄影作品页面样式 */

/* 页面标题 */
.page-header {
    text-align: center;
    padding: 60px 0 40px;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.page-header p {
    color: var(--light-text);
    font-size: 1.2rem;
}

/* 筛选按钮 */
.portfolio-filter {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 40px;
}

.filter-btn {
    background-color: transparent;
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 30px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

.filter-btn:hover, .filter-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 作品网格 */
.portfolio-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 60px;
}

.portfolio-item {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.portfolio-item img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

/* 悬停叠加层 */
.portfolio-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 20px;
    background: linear-gradient(to top, rgba(0,0,0,0.8), rgba(0,0,0,0));
    color: white;
    transition: var(--transition);
    opacity: 0;
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-category {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
    margin-bottom: 8px;
}

.portfolio-overlay h3 {
    font-size: 1.3rem;
    margin-bottom: 5px;
}

.portfolio-overlay p {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* LightGallery 自定义样式 */
.lg-backdrop {
    background-color: rgba(0, 0, 0, 0.9);
}

.lg-toolbar, .lg-outer .lg-thumb-outer {
    background-color: rgba(0, 0, 0, 0.45);
}

/* 加载状态 */
.portfolio-item.loading {
    position: relative;
}

.portfolio-item.loading::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.1);
    z-index: 1;
}

.portfolio-item.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 30px;
    height: 30px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 2;
    transform: translate(-50%, -50%);
}

/* 确保已加载的图片不显示加载动画 */
.portfolio-item:not(.loading) img[src]:not([src=""]) + .portfolio-overlay {
    /* 图片已加载且不是空地址，确保叠加层正常显示 */
    transition: opacity 0.3s ease;
}

@keyframes spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* 错误状态 */
.portfolio-item.error img {
    filter: grayscale(1);
    opacity: 0.5;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .portfolio-gallery {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    
    .portfolio-item img {
        height: 250px;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .portfolio-filter {
        gap: 10px;
    }
    
    .filter-btn {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .portfolio-gallery {
        grid-template-columns: 1fr;
    }
    
    .portfolio-item img {
        height: 280px;
    }
}