/* ============================================
   视频案例页面 — 专属样式
   - 列表页：分类筛选 + 视频网格
   - 详情页：播放器 + 推荐
   ============================================ */

/* ---------- 视频 Hero Banner（沿用 .page-banner，新增 .videos-banner 视觉） ---------- */
.videos-banner {
  min-height: 360px;
}

.videos-banner::before {
  background: linear-gradient(135deg, rgba(0, 26, 18, 0.65), rgba(0, 77, 58, 0.55));
}

.videos-banner h1 {
  font-size: var(--font-size-3xl);
  letter-spacing: 1px;
}

.videos-banner .banner-tag {
  display: inline-block;
  background: var(--color-secondary);
  color: #fff;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-4);
  letter-spacing: 1px;
}

@media (max-width: 768px) {
  .videos-banner {
    min-height: 240px;
  }
  /* Banner 内 hero-actions 按钮：一行两列 + 48px 触控 */
  .videos-banner .hero-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: 100%;
    gap: var(--space-3);
  }
  .videos-banner .hero-actions .btn {
    width: 100%;
    min-height: 48px;
    padding: 12px 14px;
    font-size: var(--font-size-sm);
    white-space: normal;
    line-height: 1.4;
    text-align: center;
  }
  /* ghost 按钮在深色底上加深边框 + 提升对比度 */
  .videos-banner .hero-actions .btn-ghost {
    border-color: rgba(255, 255, 255, 0.7);
    border-width: 2px;
    background: rgba(255, 255, 255, 0.08);
  }
}

@media (max-width: 480px) {
  .videos-banner .hero-actions .btn {
    min-height: 50px;
    padding: 13px 12px;
  }
}

/* ---------- 分类筛选栏 ---------- */
.video-filter-bar {
  display: flex;
  flex-wrap: nowrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding: 4px 2px;
}
.video-filter-bar::-webkit-scrollbar { display: none; }

.video-filter-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 1 1 0;
  min-width: 0;
  gap: 8px;
  padding: 10px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-full);
  background: #fff;
  color: var(--color-text);
  font-size: var(--font-size-base);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 44px;
  font-family: inherit;
  white-space: nowrap;
}

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

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

.video-filter-btn .filter-count {
  display: inline-block;
  background: var(--color-bg-soft);
  color: var(--color-text-light);
  font-size: var(--font-size-xs);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  min-width: 24px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.video-filter-btn.active .filter-count {
  background: rgba(255, 255, 255, 0.22);
  color: #fff;
}

.video-filter-result {
  text-align: center;
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-5);
}

.video-filter-result strong {
  color: var(--color-primary);
  font-weight: 700;
  margin: 0 4px;
}

/* ---------- 视频网格 ---------- */
.video-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 1024px) {
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
  }
}

@media (max-width: 600px) {
  .video-grid {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }
  /* 筛选按钮：窄屏紧凑 padding，避免"单机工作站"溢出 */
  .video-filter-btn {
    padding: 8px 12px;
    font-size: var(--font-size-sm);
    gap: 6px;
  }
  .video-filter-btn .filter-count {
    padding: 1px 8px;
    min-width: 22px;
  }
}

@media (max-width: 380px) {
  .video-filter-btn {
    padding: 8px 10px;
    font-size: 13px;
  }
}

/* ---------- 视频卡片 ---------- */
.video-card {
  display: block;
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  color: inherit;
  text-decoration: none;
}

.video-card:hover,
.video-card:focus-visible {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  color: inherit;
  outline: none;
}

.video-cover {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #000;
}

.video-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-base);
}

.video-card:hover .video-cover img {
  transform: scale(1.06);
}

.video-duration {
  position: absolute;
  right: 10px;
  bottom: 10px;
  background: rgba(0, 0, 0, 0.72);
  color: #fff;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.5px;
  pointer-events: none;
}

.video-category-chip {
  position: absolute;
  left: 10px;
  top: 10px;
  background: var(--color-primary);
  color: #fff;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.5px;
  pointer-events: none;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.video-category-chip.cat-single {
  background: var(--color-secondary);
}

.video-play-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.85);
  width: 64px;
  height: 64px;
  background: rgba(255, 255, 255, 0.92);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-base), transform var(--transition-base);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
  pointer-events: none;
}

.video-play-icon i {
  color: var(--color-primary);
  font-size: 24px;
  margin-left: 4px;
}

.video-card:hover .video-play-icon,
.video-card:focus-visible .video-play-icon {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.video-info {
  padding: var(--space-4) var(--space-5) var(--space-5);
}

.video-info .video-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

.video-info .video-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: var(--space-3);
  min-height: 48px;
}

.video-info .video-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
}

.video-info .video-meta i {
  color: var(--color-primary);
  font-size: 12px;
}

.video-info .video-meta .arrow {
  margin-left: auto;
  color: var(--color-primary);
  font-size: 14px;
  transition: transform var(--transition-fast);
}

.video-card:hover .video-meta .arrow {
  transform: translateX(4px);
}

/* 空状态 */
.video-empty {
  text-align: center;
  padding: var(--space-12) var(--space-4);
  color: var(--color-text-light);
  grid-column: 1 / -1;
}

.video-empty i {
  font-size: 48px;
  color: var(--color-border);
  margin-bottom: var(--space-3);
  display: block;
}

/* 触屏设备：禁用 hover 视觉（保持一致体验） */
@media (hover: none) {
  .video-card:hover {
    transform: none;
  }
  .video-card:hover .video-cover img {
    transform: none;
  }
  .video-card:hover .video-play-icon {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.85);
  }
  .video-play-icon {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
    width: 52px;
    height: 52px;
  }
  .video-play-icon i {
    font-size: 20px;
  }
}

/* ============================================
   详情页
   ============================================ */

/* 返回链接 */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-primary);
  font-size: var(--font-size-base);
  font-weight: 500;
  margin: var(--space-6) 0 var(--space-3);
  padding: 8px 0;
}

.back-link i {
  font-size: 14px;
  transition: transform var(--transition-fast);
}

.back-link:hover i {
  transform: translateX(-3px);
}

/* 视频播放器容器 */
.video-player-section {
  margin-bottom: var(--space-8);
}

.video-player-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.video-player {
  width: 100%;
  height: 100%;
  display: block;
  background: #000;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-user-drag: none;
  pointer-events: auto;
}

.video-player-wrap {
  outline: none;
}
.video-player-wrap:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* 客户端防护水印：移动 + 实时时间戳，便于泄漏视频溯源 */
.video-watermark {
  position: absolute;
  z-index: 3;
  pointer-events: none;
  color: rgba(255, 255, 255, 0.4);
  font-size: 12px;
  font-weight: 500;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.55);
  white-space: nowrap;
  user-select: none;
  -webkit-user-select: none;
  letter-spacing: 0.5px;
  background: linear-gradient(135deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  padding: 3px 8px;
  border-radius: 4px;
  transition: top 1.2s ease, left 1.2s ease, right 1.2s ease, bottom 1.2s ease, transform 1.2s ease;
  top: 12px;
  left: 12px;
  right: auto;
  bottom: auto;
  transform: rotate(0deg);
}
.video-watermark.wm-tl { top: 12px; left: 12px; right: auto; bottom: auto; transform: rotate(0deg); }
.video-watermark.wm-tr { top: 12px; right: 12px; left: auto; bottom: auto; transform: rotate(0deg); }
.video-watermark.wm-bl { bottom: 56px; left: 12px; right: auto; top: auto; transform: rotate(0deg); }
.video-watermark.wm-br { bottom: 56px; right: 12px; left: auto; top: auto; transform: rotate(0deg); }

@media (max-width: 480px) {
  .video-watermark {
    font-size: 10px;
    padding: 2px 6px;
  }
  .video-watermark.wm-bl,
  .video-watermark.wm-br { bottom: 48px; }
}

/* 视频下方版权提示 */
.video-copyright {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 12px;
  margin: var(--space-3) 0 0;
  letter-spacing: 0.02em;
}

.video-loading {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.78);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 5;
  color: #fff;
  transition: opacity var(--transition-fast);
}

.video-loading.hidden {
  opacity: 0;
  pointer-events: none;
}

.video-loading .loading-spinner {
  width: 52px;
  height: 52px;
  border: 4px solid rgba(255, 255, 255, 0.18);
  border-top-color: var(--color-secondary);
  border-radius: 50%;
  animation: video-spin 0.9s linear infinite;
  margin-bottom: var(--space-3);
}

.video-loading p {
  color: #fff;
  font-size: var(--font-size-base);
  margin: 0;
}

@keyframes video-spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.video-error {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.85);
  color: #fff;
  text-align: center;
  padding: var(--space-4);
  z-index: 6;
}

.video-error.show {
  display: flex;
}

.video-error i {
  font-size: 42px;
  color: var(--color-secondary);
  margin-bottom: var(--space-3);
}

.video-error p {
  margin: 0;
  font-size: var(--font-size-base);
}

/* 视频信息 */
.video-detail {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: var(--space-5);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-10);
}

.video-detail-main {
  flex: 1 1 60%;
  min-width: 260px;
}

.video-detail-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  line-height: 1.3;
}

.video-detail-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.video-detail-meta .meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-bg-soft);
  color: var(--color-text);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.video-detail-meta .meta-chip i {
  color: var(--color-primary);
}

.video-detail-meta .meta-chip.cat-整线 {
  background: var(--color-primary);
  color: #fff;
}

.video-detail-meta .meta-chip.cat-整线 i {
  color: #fff;
}

.video-detail-meta .meta-chip.cat-单机工作站 {
  background: var(--color-secondary);
  color: #fff;
}

.video-detail-meta .meta-chip.cat-单机工作站 i {
  color: #fff;
}

.video-detail-desc {
  font-size: var(--font-size-base);
  line-height: 1.85;
  color: var(--color-text-light);
  margin: 0;
}

.video-detail-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex-shrink: 0;
  align-items: flex-end;
}

@media (max-width: 768px) {
  .video-detail {
    flex-direction: column;
  }
  .video-detail-actions {
    flex-direction: row;
    align-items: stretch;
    width: 100%;
  }
  .video-detail-actions .btn {
    flex: 1;
  }
  .video-detail-title {
    font-size: var(--font-size-xl);
  }
}

.video-share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.video-share-btn.copied {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* 推荐视频 */
.related-section .section-header {
  margin-bottom: var(--space-6);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

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

@media (max-width: 600px) {
  .related-grid {
    grid-template-columns: 1fr;
  }
}

.related-card {
  display: block;
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  color: inherit;
  text-decoration: none;
}

.related-card:hover,
.related-card:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  color: inherit;
  outline: none;
}

.related-card .related-cover {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #000;
}

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

.related-card:hover .related-cover img {
  transform: scale(1.05);
}

.related-card .related-duration {
  position: absolute;
  right: 8px;
  bottom: 8px;
  background: rgba(0, 0, 0, 0.72);
  color: #fff;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-variant-numeric: tabular-nums;
}

.related-card .related-category {
  position: absolute;
  left: 8px;
  top: 8px;
  background: var(--color-primary);
  color: #fff;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
}

.related-card .related-category.cat-single {
  background: var(--color-secondary);
}

.related-card .related-info {
  padding: var(--space-3) var(--space-4) var(--space-4);
}

.related-card .related-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}

@media (hover: none) {
  .related-card:hover,
  .video-card:hover {
    transform: none;
  }
  .related-card:hover .related-cover img,
  .video-card:hover .video-cover img {
    transform: none;
  }
}

/* 视频未找到状态 */
.video-not-found {
  text-align: center;
  padding: var(--space-12) var(--space-4);
}

.video-not-found i {
  font-size: 64px;
  color: var(--color-border);
  margin-bottom: var(--space-4);
  display: block;
}

.video-not-found h2 {
  margin-bottom: var(--space-3);
}

.video-not-found p {
  color: var(--color-text-light);
  margin-bottom: var(--space-5);
}