/* ========== CSS 变量 ========== */
:root {
  --bg-primary: #0f0f0f;
  --bg-secondary: #1a1a1a;
  --bg-card: #1e1e1e;
  --bg-hover: #2a2a2a;
  --border: #2e2e2e;
  --text-primary: #e8e8e8;
  --text-secondary: #9a9a9a;
  --text-muted: #666;
  --accent: #4f8ef7;
  --accent-hover: #3a7af5;
  --accent-dark: rgba(79,142,247,0.12);
  --danger: #e05252;
  --danger-hover: #cc3d3d;
  --success: #4caf7d;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 2px 12px rgba(0,0,0,0.4);
  --transition: 0.2s ease;
}

/* ========== 重置 ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
* { -webkit-tap-highlight-color: rgba(0,0,0,0); }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

/* ========== Header ========== */
.site-header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}
.logo svg { color: var(--accent); }
.header-nav { display: flex; align-items: center; gap: 12px; }
.btn-admin {
  background: var(--accent-dark);
  color: var(--accent) !important;
  border: 1px solid rgba(79,142,247,0.3);
  border-radius: var(--radius-sm);
  padding: 6px 14px;
  font-size: 0.875rem;
  transition: background var(--transition);
}
.btn-admin:hover { background: rgba(79,142,247,0.2); }

/* ========== Main / Footer ========== */
.main-content, .player-main, .admin-main {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 28px 20px;
}
.site-footer {
  text-align: center;
  padding: 20px;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

/* ========== 搜索栏 ========== */
.search-bar { margin-bottom: 24px; }
.search-bar input {
  width: 100%;
  max-width: 460px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 24px;
  padding: 10px 20px;
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition);
}
.search-bar input:focus { border-color: var(--accent); }

/* ========== 状态 ========== */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 60px 20px;
  color: var(--text-secondary);
}
.spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 80px 20px;
  color: var(--text-secondary);
  text-align: center;
}
.empty-state a { color: var(--accent); }
.btn-back {
  display: inline-block;
  margin-top: 8px;
  background: var(--accent);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}
.btn-back:hover { background: var(--accent-hover); }

/* ========== 视频卡片网格 ========== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
}
.video-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: rgba(79,142,247,0.3);
}
.video-thumb {
  width: 100%;
  aspect-ratio: 16/9;
  background: #111;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}
.thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  color: var(--accent);
  opacity: 0.7;
}
.play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.35);
  opacity: 0;
  transition: opacity var(--transition);
}
.video-card:hover .play-overlay { opacity: 1; }
.play-overlay svg { filter: drop-shadow(0 2px 6px rgba(0,0,0,0.5)); }
.card-body { padding: 14px 16px; flex: 1; display: flex; flex-direction: column; gap: 6px; }
.card-title-text {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: auto;
  padding-top: 8px;
}

/* ========== 播放页 ========== */
.player-page .player-main { max-width: 960px; }
.player-container { display: flex; flex-direction: column; gap: 20px; }
.video-wrapper {
  width: 100%;
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0,0,0,0.6);
}
.main-video {
  width: 100%;
  display: block;
  aspect-ratio: 16/9;
  background: #000;
}
.video-info {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.video-title { font-size: 1.35rem; font-weight: 700; line-height: 1.4; }
.video-meta { display: flex; gap: 16px; flex-wrap: wrap; }
.meta-item { font-size: 0.85rem; color: var(--text-secondary); }
.video-desc { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.7; }
.share-section { border-top: 1px solid var(--border); padding-top: 14px; display: flex; flex-direction: column; gap: 8px; }
.share-section label { font-size: 0.875rem; color: var(--text-secondary); }
.share-input-group { display: flex; gap: 8px; }
.share-url {
  flex: 1;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 0.85rem;
  outline: none;
  min-width: 0;
}
.btn-copy {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-size: 0.875rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition);
}
.btn-copy:hover { background: var(--accent-hover); }
.copy-tip { font-size: 0.82rem; color: var(--success); }

/* ========== 管理后台 ========== */
.admin-page .admin-main { max-width: 800px; display: flex; flex-direction: column; gap: 24px; }
.admin-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.card-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-primary);
}
.card-title svg { color: var(--accent); }
.card-title-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.card-title-row .card-title { margin-bottom: 0; }

/* 表单 */
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.form-group label { font-size: 0.875rem; color: var(--text-secondary); }
.form-input, .form-textarea {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition);
  font-family: inherit;
  width: 100%;
}
.form-input:focus, .form-textarea:focus { border-color: var(--accent); }
.form-textarea { resize: vertical; min-height: 80px; }
.form-error { color: var(--danger); font-size: 0.875rem; margin-top: 8px; }
.required { color: var(--danger); }

/* 文件拖拽区 */
.file-drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 36px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.file-drop-zone:hover, .file-drop-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-dark);
}
.file-drop-zone p { color: var(--text-secondary); font-size: 0.9rem; }
.file-hint { font-size: 0.8rem !important; color: var(--text-muted) !important; }

/* 进度条 */
.progress-area { margin: 12px 0; display: flex; flex-direction: column; gap: 8px; }
.progress-bar-wrap {
  width: 100%;
  height: 8px;
  background: var(--bg-secondary);
  border-radius: 4px;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #7fb3ff);
  border-radius: 4px;
  width: 0%;
  transition: width 0.3s ease;
}
.progress-text { font-size: 0.85rem; color: var(--text-secondary); }
.upload-result {
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 0.9rem;
  margin-bottom: 12px;
}
.upload-result.success { background: rgba(76,175,125,0.12); color: var(--success); border: 1px solid rgba(76,175,125,0.3); }
.upload-result.error { background: rgba(224,82,82,0.1); color: var(--danger); border: 1px solid rgba(224,82,82,0.3); }

/* 按钮 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), opacity var(--transition);
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-size: 0.875rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  text-decoration: none;
}
.btn-secondary:hover { background: var(--bg-hover); color: var(--text-primary); }
.btn-danger {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(224,82,82,0.1);
  color: var(--danger);
  border: 1px solid rgba(224,82,82,0.25);
  border-radius: var(--radius-sm);
  padding: 5px 10px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: background var(--transition);
}
.btn-danger:hover { background: rgba(224,82,82,0.2); }

/* 管理视频列表 */
.admin-video-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.admin-video-item:last-child { border-bottom: none; }
/* 拖拽手柄 */
.drag-handle {
  flex-shrink: 0;
  width: 18px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  cursor: grab;
  padding: 4px 0;
  opacity: 0.35;
  transition: opacity var(--transition);
}
.drag-handle:active { cursor: grabbing; }
.drag-handle span {
  display: block;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
}
.admin-video-item:hover .drag-handle { opacity: 0.7; }
/* 上下移动按钮（移动端排序） */
.sort-btns { display: none; }
.sort-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.7rem;
  line-height: 1;
  padding: 3px 5px;
  transition: background var(--transition), color var(--transition);
}
.sort-btn:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
/* 拖拽中状态 */
.admin-video-item.dragging {
  opacity: 0.4;
}
/* 拖拽插入位指示线 */
.drag-over-line {
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  margin: 2px 0;
  pointer-events: none;
}
.admin-thumb {
  width: 100px;
  min-width: 100px;
  aspect-ratio: 16/9;
  background: #111;
  border-radius: var(--radius-sm);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.admin-thumb .thumb-placeholder { height: 100%; }
.admin-video-body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.admin-video-title { font-size: 0.9rem; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.admin-video-desc { font-size: 0.8rem; color: var(--text-secondary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.admin-video-meta { font-size: 0.75rem; color: var(--text-muted); }
.admin-video-actions { display: flex; gap: 6px; flex-shrink: 0; }

/* 弹窗 */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}
.modal-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  width: 100%;
  max-width: 440px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}
.modal-title { font-size: 1rem; font-weight: 600; margin-bottom: 20px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 8px; }

/* ========== 封面图片 ========== */
.thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.admin-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 封面上传控件 */
.cover-upload-row {
  display: flex;
  align-items: center;
  gap: 16px;
}
.cover-preview {
  width: 120px;
  min-width: 120px;
  aspect-ratio: 16/9;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}
.cover-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.cover-preview.drop-zone {
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}
.cover-preview.drop-zone:hover,
.cover-preview.drop-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-dark);
}
.cover-upload-ctrl { display: flex; flex-direction: column; }
.field-opt { font-size: 0.78rem; color: var(--text-muted); font-weight: 400; }

/* 描述中的链接 */
.desc-link {
  color: var(--accent);
  word-break: break-all;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.desc-link:hover { color: var(--accent-hover); }

/* ========== 页脚 ========== */
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-watermark { min-width: 100px; }
.footer-copy { text-align: center; min-width: 120px; }

.wm-link, .wm-text {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.wm-link { text-decoration: underline; }
.wm-link:hover { color: var(--accent); }

/* ========== 购买按钮 ========== */
.btn-purchase {
  display: inline-block;
  background: linear-gradient(135deg, #4caf50, #388e3c);
  color: #fff !important;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 2px 8px rgba(76,175,80,0.3);
}
.btn-purchase:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(76,175,80,0.4);
  background: linear-gradient(135deg, #66bb6a, #4caf50);
}

/* ========== 分享区域二维码 ========== */
.share-qrcode { margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); }
.qr-inline {
  display: flex;
  align-items: center;
  gap: 12px;
}
.qr-inline-img {
  width: 64px;
  height: 64px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 3px;
  flex-shrink: 0;
}
.qr-inline-info { display: flex; flex-direction: column; gap: 2px; }
.qr-inline-name { font-size: 0.85rem; color: var(--text-secondary); font-weight: 500; }
.qr-inline-desc { font-size: 0.75rem; color: var(--text-muted); }

/* ========== 管理后台分割线 ========== */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 16px 0;
}

/* ========== 分类筛选栏 ========== */
.category-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.category-bar-admin {
  margin: 0 0 14px;
  padding-bottom: 10px;
}
.category-chip {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: 16px;
  padding: 5px 14px;
  font-size: 0.82rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform 0.1s ease, box-shadow var(--transition);
  font-family: inherit;
  white-space: nowrap;
  user-select: none;
}
.category-chip:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}
.category-chip:active {
  transform: scale(0.93);
  opacity: 0.85;
}
.category-chip.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(79,142,247,0.4);
}

/* 前台卡片上的分类标签 */
.card-category {
  position: absolute;
  top: 8px;
  left: 8px;
  background: rgba(0,0,0,0.65);
  color: #fff;
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: 10px;
  backdrop-filter: blur(4px);
  max-width: calc(100% - 16px);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 后台视频项分类标签 */
.admin-category-tag {
  display: inline-block;
  margin-left: 8px;
  padding: 1px 8px;
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-dark);
  border-radius: 8px;
  vertical-align: 2px;
}

/* ========== 后台紧凑全局设置 ========== */
.admin-card-compact {
  padding: 14px 18px;
}
.admin-card-compact[open] { padding: 14px 18px 18px; }
.compact-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  list-style: none;
  user-select: none;
  gap: 12px;
}
.compact-summary::-webkit-details-marker { display: none; }
.compact-summary-title {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}
.compact-summary-title svg { color: var(--accent); }
.compact-summary-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.admin-card-compact[open] .compact-summary-hint::before { content: '点击收起'; }
.admin-card-compact[open] .compact-summary-hint { font-size: 0; }
.admin-card-compact[open] .compact-summary-hint::before { font-size: 0.75rem; }
.compact-body {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

/* ========== 折叠卡片（统一动画） ========== */
.collapsible-card { overflow: hidden; }
.collapsible-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  gap: 10px;
  padding: 2px 0;
}
.collapsible-header .card-title { margin-bottom: 0; }
.collapse-arrow {
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform 0.32s cubic-bezier(0.4,0,0.2,1);
}
.collapse-arrow.rotated { transform: rotate(180deg); }

/* grid 高度动画—平滑且不需要确定元素高度 */
.collapsible-body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s cubic-bezier(0.4,0,0.2,1);
}
.collapsible-body.open { grid-template-rows: 1fr; }
.collapsible-inner {
  overflow: hidden;
  padding-top: 0;
  transition: padding-top 0.35s cubic-bezier(0.4,0,0.2,1);
}
.collapsible-body.open .collapsible-inner { padding-top: 20px; }

/* ========== 隐藏视频标识 ========== */
.admin-video-hidden {
  opacity: 0.45;
}
.admin-video-hidden .admin-thumb { filter: grayscale(0.6); }
.hidden-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  color: var(--text-muted);
  font-size: 0.7rem;
  padding: 1px 7px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-left: 6px;
  vertical-align: 2px;
}
.compact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 14px;
}
.compact-grid .form-group { margin-bottom: 0; }
.form-input-sm {
  padding: 7px 10px;
  font-size: 0.85rem;
}
.btn-sm {
  padding: 6px 14px;
  font-size: 0.82rem;
}
.cover-preview-sm {
  width: 72px;
  min-width: 72px;
}
.compact-upload { gap: 12px; }
.compact-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
}

/* ========== 上传模式切换 Tab ========== */
.upload-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  padding: 3px;
  width: fit-content;
  margin-bottom: 18px;
  border: 1px solid var(--border);
}
.upload-tab {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: calc(var(--radius-sm) - 2px);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.88rem;
  cursor: pointer;
  transition: all var(--transition);
}
.upload-tab:hover { color: var(--text-primary); background: var(--bg-hover); }
.upload-tab.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 1px 4px rgba(79,142,247,0.35);
}
.upload-tab svg { flex-shrink: 0; }

/* ========== 封面链接预览 ========== */
.cover-link-preview {
  margin-top: 8px;
  min-height: 0;
  transition: min-height 0.2s;
}
.cover-link-preview img {
  max-height: 100px;
  max-width: 180px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  object-fit: cover;
  display: block;
}
.cover-url-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
}
.cover-url-row .file-hint { flex-shrink: 0; white-space: nowrap; }
.cover-url-row .form-input { flex: 1; }

/* ========== 链接视频标识 ========== */
.link-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  background: rgba(76,175,125,0.15);
  color: var(--success);
  border: 1px solid rgba(76,175,125,0.3);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1.5;
  vertical-align: 1px;
  margin-left: 5px;
}

/* ========== 视频列表顶部分类栏（拖拽排序） ========== */
.video-list-cat-bar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; padding: 12px 0 14px; margin-bottom: 12px; border-bottom: 1px solid var(--border); }
.vl-cat-chips { display: flex; flex-wrap: wrap; gap: 8px; min-height: 26px; }
.vl-cat-chip {
  display: inline-flex; align-items: center; gap: 4px;
  background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 14px;
  padding: 4px 10px 4px 8px; font-size: .82rem; color: var(--text-primary);
  cursor: default; user-select: none; transition: border-color var(--transition), box-shadow var(--transition);
}
.vl-cat-chip[draggable]:hover { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 15%, transparent); }
.vl-cat-chip.cat-dragging { opacity: 0.4; }
.vl-cat-chip .cat-sort-handle { cursor: grab; color: var(--text-muted); font-size: .85rem; padding: 0 2px; transition: color var(--transition); }
.vl-cat-chip .cat-sort-handle:active { cursor: grabbing; }
.vl-cat-chip:hover .cat-sort-handle { color: var(--text-secondary); }
.vl-cat-chip .cat-tag-del {
  background: none; border: none; cursor: pointer; color: var(--text-muted);
  font-size: .9rem; line-height: 1; padding: 0 2px; border-radius: 50%;
  transition: color var(--transition), background var(--transition);
}
.vl-cat-chip .cat-tag-del:hover { color: var(--danger); background: rgba(220,80,80,.12); }
.vl-cat-add-btn { flex-shrink: 0; }
.video-list-cat-add-row { display: flex; gap: 8px; align-items: center; margin-bottom: 14px; }
.cat-drag-line { display: inline-block; width: 2px; height: 22px; background: var(--accent); border-radius: 2px; vertical-align: middle; pointer-events: none; flex-shrink: 0; }


/* ========== 响应式 ========== */
@media (max-width: 640px) {
  .header-inner { padding: 0 14px; }
  .main-content, .player-main, .admin-main { padding: 16px 14px; }
  .video-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .card-body { padding: 10px 12px; }
  .video-title { font-size: 1.1rem; }
  .video-info { padding: 16px; }
  .share-input-group { flex-direction: column; }
  .admin-card { padding: 16px; }
  .admin-video-item { flex-wrap: wrap; }
  .drag-handle { display: none; }
  .sort-btns { display: flex; flex-direction: column; gap: 3px; flex-shrink: 0; justify-content: center; }
  .admin-thumb { width: 80px; min-width: 80px; }
  .footer-inner { flex-direction: column; gap: 12px; }
  .footer-watermark, .footer-copy { width: 100%; text-align: center; }
  .compact-grid { grid-template-columns: 1fr; }
  .category-chip { padding: 4px 10px; font-size: 0.78rem; }
}
@media (max-width: 400px) {
  .video-grid { grid-template-columns: 1fr; }
}