/* ============================================
   Training Page — 培训页样式
   ============================================ */

/* ---- 培训Hero ---- */
.training-hero {
    background: var(--gradient-hero);
    padding: calc(var(--header-height) + var(--space-4xl)) 0 var(--space-4xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.training-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
}

.training-hero h1 {
    font-size: var(--text-5xl);
    font-weight: var(--font-extrabold);
    color: var(--color-text-light);
    margin-bottom: var(--space-lg);
}

.training-hero p {
    font-size: var(--text-lg);
    color: var(--color-text-light-2);
    max-width: 560px;
    margin: 0 auto;
}

/* ---- 产品标签导航 ---- */
.product-tabs {
    padding: var(--space-xl) 0 0;
    background: var(--color-bg-light);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: var(--header-height);
    z-index: var(--z-sticky);
}

.product-tabs-inner {
    display: flex;
    gap: var(--space-xs);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.product-tabs-inner::-webkit-scrollbar {
    display: none;
}

.product-tab {
    padding: var(--space-md) var(--space-xl);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-secondary);
    border-bottom: 2px solid transparent;
    white-space: nowrap;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
}

.product-tab:hover {
    color: var(--color-primary);
}

.product-tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    font-weight: var(--font-semibold);
}

.product-tab i {
    font-size: 16px;
}

/* ---- 培训内容区 ---- */
.training-content {
    padding: var(--space-4xl) 0;
}

.training-section {
    margin-bottom: var(--space-4xl);
    scroll-margin-top: calc(var(--header-height) + 60px);
}

.training-section h2 {
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.training-section h2 i {
    color: var(--color-primary);
}

/* 教程卡片 */
.tutorial-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.tutorial-card {
    background: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
    text-decoration: none;
}

.tutorial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.tutorial-card-thumb {
    aspect-ratio: 16 / 9;
    background: var(--color-bg-dark-3);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.tutorial-card-thumb i {
    font-size: 32px;
    color: rgba(255, 255, 255, 0.3);
}

.tutorial-card-thumb video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.tutorial-card-thumb .play-icon {
    position: absolute;
    width: 48px;
    height: 48px;
    background: rgba(0, 84, 166, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tutorial-card-thumb .play-icon i {
    font-size: 16px;
    color: #FFFFFF;
    margin-left: 2px;
}

.tutorial-card-body {
    padding: var(--space-lg);
}

.tutorial-card-body h4 {
    margin-bottom: var(--space-xs);
    font-size: var(--text-base);
}

.tutorial-card-body p {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

.tutorial-card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-top: var(--space-sm);
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
}

/* 资料下载列表 */
.resource-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.resource-item {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg) var(--space-xl);
    background: var(--color-bg-light-2);
    border-radius: var(--radius-lg);
    transition: background var(--transition-fast);
}

.resource-item:hover {
    background: var(--color-bg-light-3);
}

.resource-item-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 20px;
}

.resource-item-icon.pdf {
    background: #FEE2E2;
    color: #DC2626;
}

.resource-item-icon.zip {
    background: #DBEAFE;
    color: #2563EB;
}

.resource-item-icon.video {
    background: #D1FAE5;
    color: #059669;
}

.resource-item-info {
    flex: 1;
    min-width: 0;
}

.resource-item-info h4 {
    font-size: var(--text-base);
    margin-bottom: 2px;
}

.resource-item-info p {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

.resource-item-download {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.resource-item-download:hover {
    background: var(--color-primary);
    color: #FFFFFF;
}

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
    .tutorial-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .training-hero h1 {
        font-size: var(--text-3xl);
    }

    .tutorial-grid {
        grid-template-columns: 1fr;
    }

    .resource-item {
        flex-wrap: wrap;
    }

    .resource-item-download {
        width: 100%;
        justify-content: center;
    }
}