/* =============================================================================== */
/* 课程列表页个性化样式 */
/* 基于 mainstyle.css 和 mainvariables.css 的设计系统 */
/* =============================================================================== */

/* ============= 课程参数样式 ============= */
.course-parameter {
    font-size: var(--text-sm);
    color: var(--text-color-tertiary);
}

/* ============= 课程筛选区域 ============= */
.course-filter {
    margin-bottom: var(--space-5);
}

/* ============= 课程卡片样式 ============= */
.course-result .card {
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: box-shadow var(--transition-base), 
                border-color var(--transition-base),
                transform var(--transition-base);
    will-change: transform, box-shadow;
}

.course-result .card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-200);
    transform: translateY(-2px);
}

.course-result .card-image {
    position: relative;
    overflow: hidden;
}

.course-result .card-image img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    transition: transform var(--transition-base);
    will-change: transform;
}

.course-result .card:hover .card-image img {
    transform: scale(1.05);
}

.course-result .card-body {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    padding: var(--space-5);
}

.course-result .card-title {
    font-size: var(--text-lg);
    font-weight: var(--font-weight-semibold);
    text-align: center;
    color: var(--text-color-primary);
    margin-bottom: var(--space-3);
    line-height: var(--line-height-title);
}

.course-result .card-text.description {
    margin: 0;
    flex-grow: 1;
    font-size: var(--text-sm);
    color: var(--text-color-secondary);
    line-height: var(--line-height-normal);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.course-result .card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: var(--space-5);
    gap: var(--space-3);
}

/* ============= 响应式设计 ============= */
@media (max-width: 767px) {
    .course-result .card-body {
        padding: var(--space-5);
    }
    
    .course-result .card-title {
        font-size: var(--text-base);
    }
    
    .course-result .card-meta {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-2);
    }
    
    .course-result .card-meta .btn {
        width: 100%;
        text-align: center;
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .course-result .card-title {
        font-size: var(--text-base);
    }
}

/* ============= 推荐课程轮播区域 ============= */
.scroll-carousel-section {
    padding: var(--space-8) 0;
    margin-top: var(--space-8);
    background-color: var(--bg-color-secondary);
    border-top: 1px solid var(--border-color-default);
    border-bottom: 1px solid var(--border-color-default);
}

.scroll-section-header {
    text-align: center;
    margin-bottom: var(--space-6);
}

.scroll-section-title {
    font-size: var(--text-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-color-primary);
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
}

/* ============= 轮播容器 ============= */
.scroll-carousel {
    display: flex;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE 10+ */
    cursor: grab;
    width: 100%;
    will-change: scroll-position;
}

.scroll-carousel::-webkit-scrollbar {
    display: none; /* WebKit */
}

.scroll-carousel:active {
    cursor: grabbing;
}

.carousel-track {
    display: flex;
    flex-wrap: nowrap;
    gap: var(--space-4);
    min-width: min-content;
    padding: var(--space-2) 0;
}

/* ============= 轮播卡片 ============= */
.carousel-card {
    flex: 0 0 auto;
    width: 280px;
    background: var(--bg-color-primary);
    border: 1px solid var(--border-color-default);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: box-shadow var(--transition-base),
                transform var(--transition-base);
    box-shadow: var(--shadow-sm);
    will-change: transform, box-shadow;
}

.carousel-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.carousel-card a.card-link {
    text-decoration: none;
    color: inherit;
    display: block;
    height: 100%;
}

.carousel-card-image {
    width: 100%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
}

.carousel-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
    will-change: transform;
}

.carousel-card:hover .carousel-card-image img {
    transform: scale(1.05);
}

.carousel-card-body {
    padding: var(--space-4);
}

.carousel-card-body .card-title {
    font-size: var(--text-base);
    font-weight: var(--font-weight-semibold);
    color: var(--text-color-primary);
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: var(--line-height-title);
}

/* ============= 轮播响应式设计 ============= */
@media (max-width: 767px) {
    .carousel-card {
        width: 240px;
    }
    
    .carousel-card-body {
        padding: var(--space-3);
    }
    
    .carousel-card-body .card-title {
        font-size: var(--text-sm);
    }
}

@media (min-width: 1920px) {
    .carousel-card {
        width: 320px;
    }
}

/* ============= 可访问性增强 ============= */
@media (prefers-reduced-motion: reduce) {
    .course-result .card,
    .course-result .card-image img,
    .carousel-card,
    .carousel-card-image img {
        transition: none;
        transform: none;
    }
    
    .course-result .card:hover,
    .carousel-card:hover {
        transform: none;
    }
}

/* ============= 高对比度模式支持 ============= */
@media (prefers-contrast: high) {
    .course-result .card {
        border-width: 2px;
    }
    
    .carousel-card {
        border-width: 2px;
    }
}

/* ============= 打印样式优化 ============= */
@media print {
    .course-result .card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid var(--neutral-300);
    }
    
    .course-result .card-image img {
        max-height: 200px;
    }
    
    .scroll-carousel-section {
        display: none;
    }
    
    .course-filter {
        display: none;
    }
}