/* ========================================
   分类详情页样式
   ======================================== */

/* 分类横幅 */
.category-banner {
    background: linear-gradient(135deg, #2d5a27 0%, #4a9c40 50%, #6bb04d 100%);
    padding: 48px 0;
    position: relative;
    overflow: hidden;
}

.category-banner .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.category-banner .banner-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    font-size: 14px;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s;
}

.breadcrumb a:hover {
    color: white;
}

.breadcrumb .separator {
    color: rgba(255, 255, 255, 0.5);
}

.breadcrumb .current {
    color: white;
}

.category-title {
    font-size: 42px;
    font-weight: 800;
    color: white;
    margin-bottom: 16px;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.category-desc {
    font-size: 16px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 28px;
    max-width: 600px;
}

.category-stats {
    display: flex;
    gap: 48px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: #ffd700;
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 4px;
}

.banner-decoration {
    display: flex;
    gap: 24px;
}

.animal-icon {
    font-size: 80px;
    animation: float 3s ease-in-out infinite;
    filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.2));
}

.animal-icon:nth-child(2) {
    animation-delay: 0.4s;
}

.animal-icon:nth-child(3) {
    animation-delay: 0.8s;
}

/* 筛选区域 */
.filter-section {
    background: var(--bg-primary);
    padding: 20px 0;
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 70px;
    z-index: 100;
}

.filter-bar {
    display: flex;
    gap: 48px;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.filter-label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.filter-btn {
    padding: 8px 20px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

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

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

/* 书籍网格 */
.main-content {
    padding: 48px 0;
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
    margin-bottom: 48px;
}

/* 大卡片样式 */
.book-card-large {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
    border: 1px solid var(--border-light);
}

.book-card-large:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.book-card-large .card-cover {
    position: relative;
    width: 100%;
    aspect-ratio: 750 / 422;
    overflow: hidden;
}

.book-card-large .card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s;
}

.book-card-large:hover .card-cover img {
    transform: scale(1.08);
}

.book-card-large .card-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--primary-color);
    color: white;
    font-size: 12px;
    padding: 5px 14px;
    border-radius: 4px;
    font-weight: 500;
}

.book-card-large .free-badge {
    background: var(--accent-orange);
}

.book-card-large .play-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.book-card-large:hover .play-overlay {
    opacity: 1;
}

.book-card-large .play-icon {
    width: 64px;
    height: 64px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--primary-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    transition: transform 0.3s;
}

.book-card-large .play-icon:hover {
    transform: scale(1.1);
}

.book-card-large .card-body {
    padding: 20px;
}

.book-card-large .card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.book-card-large .card-author {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.book-card-large .card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-card-large .card-meta {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
}

.book-card-large .meta-item {
    font-size: 13px;
    color: var(--text-muted);
}

.book-card-large .card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--border-light);
}

.book-card-large .card-price {
    font-size: 22px;
    font-weight: 700;
    color: var(--accent-orange);
}

.book-card-large .free-price {
    color: var(--primary-color);
}

.book-card-large .subscribe-btn {
    padding: 10px 24px;
    border-radius: 24px;
    border: none;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 2px 8px rgba(107, 176, 77, 0.3);
}

.book-card-large .subscribe-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(107, 176, 77, 0.4);
}

.book-card-large .free-btn {
    background: linear-gradient(135deg, var(--accent-orange), #f8b500);
    box-shadow: 0 2px 8px rgba(245, 166, 35, 0.3);
}

.book-card-large .free-btn:hover {
    box-shadow: 0 4px 16px rgba(245, 166, 35, 0.4);
}

/* 分页 */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.page-btn {
    padding: 12px 24px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.page-btn:hover:not(.disabled) {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.page-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.page-numbers {
    display: flex;
    gap: 8px;
}

.page-num {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.page-num:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.page-num.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.page-ellipsis {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
}

/* 响应式 */
@media (max-width: 1024px) {
    .books-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .category-title {
        font-size: 32px;
    }

    .banner-decoration {
        display: none;
    }
}

@media (max-width: 768px) {
    .books-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .filter-bar {
        flex-direction: column;
        gap: 16px;
    }

    .filter-group {
        flex-wrap: wrap;
    }

    .category-title {
        font-size: 26px;
    }

    .category-stats {
        gap: 32px;
    }

    .stat-value {
        font-size: 24px;
    }

    .filter-section {
        position: static;
    }
}

@media (max-width: 480px) {
    .books-grid {
        grid-template-columns: 1fr;
    }

    .book-card-large {
        display: flex;
    }

    .book-card-large .card-cover {
        width: 140px;
        aspect-ratio: 750 / 422;
        flex-shrink: 0;
    }

    .book-card-large .card-body {
        flex: 1;
        padding: 16px;
    }

    .book-card-large .card-desc {
        display: none;
    }

    .pagination {
        flex-wrap: wrap;
    }
}