/* ===== 作品展厅专用样式 ===== */

/* 页面标题 */
.page-header {
    padding: 150px 0 80px;
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-medium) 100%);
    color: var(--color-white);
    text-align: center;
}

.page-header h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    letter-spacing: 6px;
}

.page-header p {
    font-size: 1.1rem;
    color: var(--color-gray);
}

/* 筛选区 */
.filter-section {
    padding: var(--spacing-md) 0 var(--spacing-lg);
    background: var(--color-white);
    position: sticky;
    top: 70px;
    z-index: 100;
    border-bottom: 1px solid var(--color-lighter);
}

.filter-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    background: var(--color-bg);
    border: 2px solid transparent;
    color: var(--color-medium);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 4px;
}

.filter-btn:hover {
    border-color: var(--color-gray);
    color: var(--color-dark);
}

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

/* 作品网格 */
.gallery-section {
    background: var(--color-bg);
    padding: var(--spacing-lg) 0;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.gallery-item {
    background: var(--color-white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.4s ease;
    cursor: pointer;
}

.gallery-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

.gallery-item.hidden {
    display: none;
}

.gallery-image {
    position: relative;
    height: 240px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.placeholder-text {
    color: var(--color-white);
    font-size: 1.1rem;
    font-weight: 500;
    opacity: 0.8;
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(44, 44, 44, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.view-btn {
    color: var(--color-white);
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 2px;
    padding: 0.75rem 2rem;
    border: 2px solid var(--color-white);
    transition: all 0.3s ease;
}

.view-btn:hover {
    background: var(--color-white);
    color: var(--color-dark);
}

.gallery-info {
    padding: var(--spacing-md);
}

.gallery-info h4 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-dark);
}

.gallery-info p {
    color: var(--color-gray);
    font-size: 0.9rem;
}

/* 加载更多 */
.load-more {
    text-align: center;
    padding: var(--spacing-md) 0;
}

.load-more .btn-secondary {
    padding: 1rem 3rem;
}

/* 图片加载动画 */
.gallery-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

/* 响应式 */
@media (max-width: 768px) {
    .filter-section {
        top: 60px;
    }
    
    .filter-buttons {
        gap: var(--spacing-xs);
    }
    
    .filter-btn {
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: var(--spacing-sm);
    }
}