/**
 * Premium SEO Template - Video Layout CSS
 * 视频布局样式 - 横向16:9宽屏格式
 */

/* ========== 视频网格布局 ========== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 15px;
  margin-bottom: 30px;
  list-style: none;
  padding: 0;
  margin-top: 0;
}

/* ========== 视频项目 ========== */
.video-item {
  display: flex;
  flex-direction: column;
  background: var(--bg-white);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  animation: slideInUp 0.5s ease-out;
  animation-fill-mode: both;
}

.video-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

/* ========== 视频链接 ========== */
.video-link {
  display: flex;
  flex-direction: column;
  height: 100%;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
}

/* ========== 视频封面容器 ========== */
.video-cover {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 宽高比 */
  background: #000;
  overflow: hidden;
  flex-shrink: 0;
}

/* ========== 视频封面图片 ========== */
.cover-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.3s ease;
  background: linear-gradient(135deg, #f5f5f5 0%, #e0e0e0 100%);
}

.video-item:hover .cover-image {
  transform: scale(1.05);
}

/* ========== 覆盖层 ========== */
.cover-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  z-index: 10;
}

.video-item:hover .cover-overlay {
  background: rgba(0, 0, 0, 0.4);
}

/* ========== 播放按钮 ========== */
.play-icon {
  width: 60px;
  height: 60px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--highlight-color);
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.video-item:hover .play-icon {
  opacity: 1;
  transform: scale(1);
}

/* ========== 视频统计信息 ========== */
.video-stats {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--text-light);
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.stat-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(15, 52, 96, 0.08);
  color: var(--text-light);
  padding: 4px 8px;
  border-radius: 3px;
  font-size: 11px;
  font-weight: 600;
  animation: slideInUp 0.4s ease-out;
  animation-fill-mode: both;
}

.stat-hits {
  animation-delay: 0.1s;
}

.stat-date {
  animation-delay: 0.2s;
}

.stat-item i {
  font-size: 12px;
  font-style: normal;
}

/* ========== 视频信息区 ========== */
.video-info {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  padding: 12px;
  background: var(--bg-white);
  overflow: hidden;
  min-height: 80px;
}

/* ========== 视频标题 ========== */
.video-title {
  margin: 0 0 8px 0;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 0.3s ease;
}

.video-item:hover .video-title {
  color: var(--highlight-color);
}

/* ========== 视频元数据 ========== */
.video-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-light);
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.meta-category a {
  color: var(--accent-color);
  text-decoration: none;
  transition: color 0.3s ease;
  padding: 2px 6px;
  border-radius: 3px;
  background: rgba(15, 52, 96, 0.1);
}

.meta-category a:hover {
  color: var(--highlight-color);
  background: rgba(233, 69, 96, 0.1);
}

.meta-date {
  color: var(--text-muted);
}

/* ========== 视频描述 ========== */
.video-description {
  margin: 0;
  font-size: 12px;
  color: var(--text-light);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ========== 响应式设计 ========== */

/* 平板设备 (768px - 1024px) */
@media (max-width: 1024px) {
  .video-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
  }

  .video-title {
    font-size: 13px;
  }

  .video-meta {
    font-size: 11px;
  }

  .video-description {
    font-size: 11px;
  }

  .play-icon {
    width: 50px;
    height: 50px;
    font-size: 20px;
  }
}

/* 大手机 (480px - 768px) */
@media (max-width: 768px) {
  .video-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 12px;
  }

  .video-item {
    border-radius: 6px;
  }

  .video-info {
    padding: 10px;
  }

  .video-title {
    font-size: 12px;
    margin-bottom: 6px;
  }

  .video-meta {
    font-size: 10px;
    margin-bottom: 6px;
  }

  .video-description {
    font-size: 10px;
    display: none; /* 手机上隐藏描述 */
  }

  .play-icon {
    width: 45px;
    height: 45px;
    font-size: 18px;
  }

  .video-badges {
    top: 6px;
    right: 6px;
    gap: 4px;
  }

  .badge {
    padding: 3px 6px;
    font-size: 10px;
  }
}

/* 小手机 (360px - 480px) */
@media (max-width: 480px) {
  .video-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 10px;
  }

  .video-item {
    border-radius: 4px;
  }

  .video-info {
    padding: 8px;
  }

  .video-title {
    font-size: 11px;
    margin-bottom: 4px;
    -webkit-line-clamp: 1;
  }

  .video-meta {
    font-size: 9px;
    margin-bottom: 4px;
  }

  .play-icon {
    width: 40px;
    height: 40px;
    font-size: 16px;
  }

  .badge {
    padding: 2px 4px;
    font-size: 9px;
  }
}

/* 超小手机 (< 360px) */
@media (max-width: 360px) {
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .video-item {
    border-radius: 3px;
  }

  .video-info {
    padding: 6px;
  }

  .video-title {
    font-size: 10px;
    margin-bottom: 3px;
  }

  .video-meta {
    font-size: 8px;
  }

  .play-icon {
    width: 35px;
    height: 35px;
    font-size: 14px;
  }
}

/* ========== 动画效果 ========== */
.video-item:nth-child(1) { animation-delay: 0.05s; }
.video-item:nth-child(2) { animation-delay: 0.1s; }
.video-item:nth-child(3) { animation-delay: 0.15s; }
.video-item:nth-child(4) { animation-delay: 0.2s; }
.video-item:nth-child(5) { animation-delay: 0.25s; }
.video-item:nth-child(6) { animation-delay: 0.3s; }
.video-item:nth-child(n+7) { animation-delay: 0.35s; }

/* ========== 加载状态 ========== */
.video-item.loading .cover-image {
  animation: pulse 1.5s ease-in-out infinite;
}

/* ========== 暗黑模式 ========== */
@media (prefers-color-scheme: dark) {
  .video-item {
    background: var(--bg-white);
  }

  .video-title {
    color: var(--text-dark);
  }

  .video-meta {
    color: var(--text-light);
  }

  .video-description {
    color: var(--text-light);
  }
}

/* ========== 打印样式 ========== */
@media print {
  .video-item:hover {
    transform: none;
    box-shadow: none;
  }

  .cover-overlay {
    display: none;
  }

  .video-badges {
    display: none;
  }
}

/* ========== 无障碍支持 ========== */
@media (prefers-reduced-motion: reduce) {
  .video-item,
  .cover-image,
  .play-icon,
  .video-title {
    animation: none;
    transition: none;
  }
}

/* ========== 焦点状态 ========== */
.video-link:focus {
  outline: 2px solid var(--highlight-color);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ========== 高对比度模式 ========== */
@media (prefers-contrast: more) {
  .video-item {
    border: 1px solid var(--border-color);
  }

  .video-title {
    font-weight: 800;
  }

  .play-icon {
    border: 2px solid var(--highlight-color);
  }
}