/* 艺术分类导航 */
.art-nav {
    background-color: #fff;
    padding: 20px 0;
    margin-bottom: 30px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.art-nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
    display: flex;
    gap: 15px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.art-nav-btn {
    padding: 10px 20px;
    border: 2px solid #ddd;
    border-radius: 30px;
    background-color: transparent;
    color: #666;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
}

.art-nav-btn:hover,
.art-nav-btn.active {
    border-color: #c41230;
    background-color: #c41230;
    color: #fff;
}

/* 艺术展示区 */
.art-showcase {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

/* 艺术卡片 */
.art-card {
    background-color: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
}

.art-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.art-card-image {
    position: relative;
    padding-top: 75%;
    overflow: hidden;
}

.art-card-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.art-card:hover .art-card-image img {
    transform: scale(1.1);
}

.art-card-content {
    padding: 20px;
}

.art-card-content h3 {
    font-size: 24px;
    color: #333;
    margin-bottom: 10px;
}

.art-period {
    color: #c41230;
    font-size: 14px;
    margin-bottom: 15px;
}

.art-description {
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
}

.art-features {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.art-features span {
    padding: 4px 12px;
    background-color: #f5f5f5;
    border-radius: 15px;
    font-size: 14px;
    color: #666;
}

/* 卡片悬停效果 */
.art-card-hover {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(196, 18, 48, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.art-card:hover .art-card-hover {
    opacity: 1;
    visibility: visible;
}

.hover-content {
    padding: 30px;
    color: #fff;
    text-align: center;
}

.hover-content h4 {
    font-size: 20px;
    margin-bottom: 15px;
}

.hover-content ul {
    list-style: none;
    margin-bottom: 20px;
}

.hover-content li {
    margin-bottom: 10px;
}

.learn-more {
    display: inline-block;
    padding: 10px 25px;
    background-color: #fff;
    color: #c41230;
    border-radius: 25px;
    text-decoration: none;
    transition: all 0.3s;
}

.learn-more:hover {
    background-color: #f5f5f5;
    transform: scale(1.05);
}

/* 加载更多按钮 */
.load-more {
    text-align: center;
    margin: 40px 0;
}

#loadMoreBtn {
    padding: 12px 30px;
    background-color: #c41230;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#loadMoreBtn:hover {
    background-color: #a00f28;
}

/* 响应式设计 */
@media screen and (max-width: 768px) {
    .art-nav-inner {
        padding: 0 10px;
    }

    .art-nav-btn {
        padding: 8px 15px;
        font-size: 14px;
    }

    .art-showcase {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 20px;
        padding: 0 10px;
    }

    .art-card-content {
        padding: 15px;
    }

    .art-card-content h3 {
        font-size: 20px;
    }

    .hover-content {
        padding: 20px;
    }
}

/* 动画效果 */
.art-card {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.5s ease forwards;
}

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

/* 延迟动画 */
.art-card:nth-child(2) {
    animation-delay: 0.1s;
}

.art-card:nth-child(3) {
    animation-delay: 0.2s;
}

.art-card:nth-child(4) {
    animation-delay: 0.3s;
}

.art-card:nth-child(5) {
    animation-delay: 0.4s;
}