.edu-page { padding-top: 64px; min-height: 100vh; background: var(--color-bg-alt); }

.edu-hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: 48px 0 40px;
    text-align: center;
}

.edu-hero-title { color: #fff; font-size: 28px; font-weight: 700; margin-bottom: 8px; }
.edu-hero-desc { color: rgba(255,255,255,.75); font-size: 15px; }

.container.edu-body { padding: 40px 24px 48px; }

.edu-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.edu-tag-btn {
    display: inline-block;
    padding: 6px 18px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: #fff;
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

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

.edu-tag-btn.active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.edu-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.edu-card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition);
    text-decoration: none;
    color: inherit;
}

.edu-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

.edu-card-cover {
    aspect-ratio: 16/9;
    background: var(--color-bg-alt);
    overflow: hidden;
    position: relative;
}

.edu-card-cover img { width: 100%; height: 100%; object-fit: cover; }

.edu-card-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
}

.edu-card-placeholder svg { width: 40px; height: 40px; }

.edu-card-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,.7);
    color: #fff;
    font-size: 11px;
    padding: 2px 6px;
    border-radius: 4px;
}

.edu-card-info { padding: 14px 16px; }

.edu-card-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.edu-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: 8px;
}

.edu-card-tag {
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 10px;
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.edu-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--color-text-light);
}

.edu-card-price { font-size: 16px; font-weight: 700; color: var(--color-accent); }
.edu-card-free { font-size: 13px; font-weight: 600; color: #16a34a; }

.edu-empty { text-align: center; padding: 48px 0; color: var(--color-text-light); }

/* ========== Play Page ========== */

.play-page { padding-top: 64px; min-height: 100vh; background: var(--color-bg-alt); }

.play-wrapper {
    display: flex;
    gap: 24px;
    padding-top: 24px;
    padding-bottom: 48px;
}

.play-main { flex: 1; min-width: 0; }

.play-video-box {
    aspect-ratio: 16/9;
    background: #000;
    border-radius: var(--radius);
    overflow: hidden;
}

.play-video { width: 100%; height: 100%; display: block; }

.play-iframe { border: none; }

.play-lock {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    color: rgba(255,255,255,.8);
    font-size: 15px;
}

.play-lock-actions { display: flex; gap: 12px; }

.play-info { margin-top: 20px; }

.play-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 10px;
}

.play-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--color-text-light);
    flex-wrap: wrap;
}

.play-tag {
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 10px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    transition: all var(--transition);
}

.play-tag:hover { background: var(--color-primary); color: #fff; }

.play-desc {
    margin-top: 16px;
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.play-sidebar {
    width: 300px;
    flex-shrink: 0;
}

.play-sidebar-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
}

.play-related-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.play-related-item {
    display: flex;
    gap: 10px;
    text-decoration: none;
    color: inherit;
    transition: color var(--transition);
}

.play-related-item:hover { color: var(--color-accent); }

.play-related-cover {
    width: 120px;
    aspect-ratio: 16/9;
    flex-shrink: 0;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--color-bg-alt);
}

.play-related-cover img { width: 100%; height: 100%; object-fit: cover; }

.play-related-cover .edu-card-placeholder {
    height: 100%;
}

.play-related-cover .edu-card-placeholder svg { width: 24px; height: 24px; }

.play-related-info { flex: 1; min-width: 0; }

.play-related-title {
    font-size: 13px;
    font-weight: 500;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 4px;
}

.play-related-meta { font-size: 11px; color: var(--color-text-light); }

/* ========== Responsive ========== */

@media (max-width: 1024px) {
    .edu-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .edu-grid { grid-template-columns: 1fr; }
    .play-wrapper { flex-direction: column; }
    .play-sidebar { width: 100%; }
    .play-related-list { flex-direction: row; overflow-x: auto; -webkit-overflow-scrolling: touch; }
    .play-related-item { flex-direction: column; min-width: 140px; }
    .play-related-cover { width: 100%; }
    .edu-hero { padding: 32px 0 28px; }
    .edu-hero-title { font-size: 22px; }
    .edu-page { padding-top: 56px; }
    .play-page { padding-top: 56px; }
    .play-title { font-size: 18px; }
    .edu-card-info { padding: 12px; }
    .edu-card-title { font-size: 14px; }
}

@media (max-width: 480px) {
    .edu-tags { gap: 6px; }
    .edu-tag-btn { padding: 5px 14px; font-size: 12px; }
    .play-lock { font-size: 14px; padding: 20px; }
    .play-lock-actions { flex-direction: column; }
    .play-lock-actions .btn { width: 100%; text-align: center; }
}