/* ============================================================
   马赛克视频 (Mosaic Video) - 公共样式
   支持三种主题：亮色 / 暗色(dark-mode, mode-dark) / 科幻(scifi-mode)
   ============================================================ */

/* ===== 主题CSS变量 ===== */
body:not(.dark-mode):not(.mode-dark):not(.scifi-mode) {
    --mosaic-primary: #6366f1;
    --mosaic-hover: #4f46e5;
    --mosaic-light: #eef2ff;
    --mosaic-border: #e1e8ed;
    --mosaic-text: #14171a;
    --mosaic-text-light: #657786;
    --card-bg: #fff;
    --card-text: #212529;
    --theme-shadow: rgba(0, 0, 0, 0.08);
}

body.dark-mode,
body.mode-dark {
    --mosaic-primary: #818cf8;
    --mosaic-hover: #6366f1;
    --mosaic-light: rgba(255, 255, 255, 0.05);
    --mosaic-border: rgba(255, 255, 255, 0.1);
    --mosaic-text: #f8f9fa;
    --mosaic-text-light: rgba(255, 255, 255, 0.6);
    --card-bg: #343a40;
    --card-text: #f8f9fa;
    --theme-shadow: rgba(255, 255, 255, 0.1);
}

body.scifi-mode {
    --mosaic-primary: #00d9ff;
    --mosaic-hover: #00b8d4;
    --mosaic-light: rgba(0, 217, 255, 0.1);
    --mosaic-border: rgba(100, 200, 255, 0.3);
    --mosaic-text: #66b3ff;
    --mosaic-text-light: #78c5ff;
    --card-bg: rgba(26, 26, 46, 0.95);
    --card-text: #66b3ff;
    --theme-shadow: rgba(100, 200, 255, 0.2);
}

/* ===== 页面容器 ===== */
.mosaic-container {
    padding-top: 8px;
    padding-bottom: 16px;
}

/* ===== 紧凑头部栏（一行整合） ===== */
.mosaic-header-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 0;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.mosaic-header-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--mosaic-text);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 6px;
    margin-right: 4px;
}

.mosaic-header-title i {
    color: var(--mosaic-primary);
    font-size: 14px;
}

.mosaic-header-right {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.mosaic-upload-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 5px 14px;
    background: var(--mosaic-primary);
    color: #fff;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    transition: background 0.2s;
}

.mosaic-upload-btn:hover {
    background: var(--mosaic-hover);
    color: #fff;
}

/* ===== 筛选栏（保留给其他页面） ===== */
.mosaic-filter-bar {
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 1px 4px var(--theme-shadow);
    padding: 8px 16px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
}

body.scifi-mode .mosaic-filter-bar {
    border: 1px solid var(--mosaic-border);
}

.mosaic-category-tabs {
    display: flex;
    gap: 4px;
    flex-wrap: nowrap;
}

.mosaic-category-tab {
    padding: 5px 12px;
    border-radius: 14px;
    font-size: 12px;
    font-weight: 500;
    color: var(--mosaic-text-light);
    background: var(--mosaic-light);
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
    white-space: nowrap;
}

.mosaic-category-tab:hover,
.mosaic-category-tab.active {
    background: var(--mosaic-primary);
    color: #fff;
}

.mosaic-sort-toggle {
    display: flex;
    gap: 2px;
    background: var(--mosaic-light);
    border-radius: 14px;
    padding: 3px;
}

.mosaic-sort-btn {
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    color: var(--mosaic-text-light);
    background: none;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
}

.mosaic-sort-btn:hover,
.mosaic-sort-btn.active {
    background: var(--mosaic-primary);
    color: #fff;
}

/* ===== CSS Grid 视频列表 ===== */
.mosaic-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 12px;
}

/* ===== 视频卡片（紧凑版） ===== */
.mosaic-video-card {
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 1px 4px var(--theme-shadow);
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
}

body.scifi-mode .mosaic-video-card {
    border: 1px solid var(--mosaic-border);
}

.mosaic-video-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--theme-shadow);
}

.mosaic-video-thumb {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: #000;
}

.mosaic-video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.mosaic-video-card:hover .mosaic-video-thumb img {
    transform: scale(1.03);
}

.mosaic-video-duration {
    position: absolute;
    bottom: 4px;
    right: 4px;
    background: rgba(0, 0, 0, 0.8);
    color: #fff;
    font-size: 10px;
    font-weight: 500;
    padding: 1px 5px;
    border-radius: 3px;
}

.mosaic-video-status {
    position: absolute;
    top: 4px;
    left: 4px;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
    color: #fff;
}

.mosaic-video-status.published { background: #10b981; }
.mosaic-video-status.draft { background: #f59e0b; }
.mosaic-video-status.reviewing { background: #3b82f6; }

/* ===== 卡片信息区：单行 flex ===== */
.mosaic-video-info {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 8px;
    min-width: 0;
    overflow: hidden;
}

.mosaic-video-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--mosaic-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    min-width: 0;
    line-height: 1.3;
    text-decoration: none;
}

.mosaic-video-title:hover {
    color: var(--mosaic-primary);
}

a.mosaic-video-title {
    color: var(--mosaic-text);
    text-decoration: none;
}

a.mosaic-video-title:hover {
    color: var(--mosaic-primary);
}

.mosaic-video-author-avatar {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.mosaic-video-author-name {
    font-size: 11px;
    color: var(--mosaic-text-light);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 60px;
    flex-shrink: 0;
}

.mosaic-video-stats {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    font-size: 10px;
    color: var(--mosaic-text-light);
    white-space: nowrap;
    flex-shrink: 0;
}

.mosaic-video-stats i {
    font-size: 9px;
    margin-left: 3px;
}

.mosaic-video-stats i:first-child {
    margin-left: 0;
}

.mosaic-video-stat {
    display: inline-flex;
    align-items: center;
    gap: 2px;
}

.mosaic-video-time {
    font-size: 10px;
    color: var(--mosaic-text-light);
    white-space: nowrap;
    flex-shrink: 0;
}

/* ===== 管理按钮栏 ===== */
.mosaic-video-manage {
    display: flex;
    gap: 8px;
    border-top: 1px solid var(--mosaic-border);
    padding: 10px 16px;
}

.mosaic-manage-btn {
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    border: 1px solid var(--mosaic-border);
    background: var(--card-bg);
    color: var(--mosaic-text);
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.mosaic-manage-btn:hover {
    border-color: var(--mosaic-primary);
    color: var(--mosaic-primary);
}

.mosaic-manage-btn.danger {
    color: #e74c3c;
    border-color: transparent;
}

.mosaic-manage-btn.danger:hover {
    border-color: #e74c3c;
    background: rgba(231, 76, 60, 0.05);
}

/* ===== Tab切换（我的视频页） ===== */
.mosaic-my-tabs {
    display: flex;
    gap: 4px;
    background: var(--card-bg);
    border-radius: 16px;
    padding: 6px;
    box-shadow: 0 2px 8px var(--theme-shadow);
    margin-bottom: 24px;
}

body.scifi-mode .mosaic-my-tabs {
    border: 1px solid var(--mosaic-border);
}

.mosaic-my-tab {
    flex: 1;
    text-align: center;
    padding: 10px 16px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    color: var(--mosaic-text-light);
    background: none;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.mosaic-my-tab:hover {
    color: var(--mosaic-text);
    background: var(--mosaic-light);
}

.mosaic-my-tab.active {
    background: var(--mosaic-primary);
    color: #fff;
}

/* ===== 播放器容器 ===== */
.mosaic-player-wrapper {
    background: #000;
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.mosaic-player-wrapper .video-js {
    width: 100%;
}

/* Video.js 自定义覆盖 */
.mosaic-player-wrapper .video-js .vjs-big-play-button {
    border-radius: 50%;
    width: 64px;
    height: 64px;
    line-height: 64px;
    border: none;
    background: rgba(99, 102, 241, 0.9);
    transition: transform 0.2s, background 0.2s;
}

.mosaic-player-wrapper .video-js .vjs-big-play-button:hover {
    background: rgba(79, 70, 229, 0.95);
    transform: scale(1.1);
}

.mosaic-player-wrapper .video-js .vjs-control-bar {
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
}

body.scifi-mode .mosaic-player-wrapper {
    border: 1px solid var(--mosaic-border);
    box-shadow: 0 4px 20px rgba(0, 217, 255, 0.15);
}

body.scifi-mode .mosaic-player-wrapper .video-js .vjs-big-play-button {
    background: rgba(0, 217, 255, 0.8);
}

/* ===== 详情卡片 ===== */
.mosaic-detail-card {
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: 0 2px 8px var(--theme-shadow);
    margin-bottom: 20px;
    overflow: hidden;
}

body.scifi-mode .mosaic-detail-card {
    border: 1px solid var(--mosaic-border);
}

.mosaic-detail-header {
    padding: 20px 24px;
}

.mosaic-detail-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--mosaic-text);
    margin-bottom: 12px;
    line-height: 1.4;
}

.mosaic-detail-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.mosaic-detail-author {
    display: flex;
    align-items: center;
    gap: 10px;
}

.mosaic-detail-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.mosaic-detail-author-name {
    font-weight: 600;
    font-size: 15px;
    color: var(--mosaic-text);
}

.mosaic-detail-stats {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 14px;
    color: var(--mosaic-text-light);
}

.mosaic-detail-stat {
    display: flex;
    align-items: center;
    gap: 4px;
}

.mosaic-detail-time {
    font-size: 14px;
    color: var(--mosaic-text-light);
}

.mosaic-detail-desc {
    padding: 0 24px 20px;
    font-size: 15px;
    line-height: 1.7;
    color: var(--mosaic-text);
    white-space: pre-wrap;
}

/* ===== 互动按钮栏 ===== */
.mosaic-actions {
    display: flex;
    align-items: center;
    justify-content: space-around;
    padding: 14px 24px;
    border-top: 1px solid var(--mosaic-border);
}

.mosaic-action-btn {
    flex: 1;
    padding: 10px 16px;
    background: none;
    border: none;
    color: var(--mosaic-text-light);
    cursor: pointer;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    transition: all 0.2s;
}

.mosaic-action-btn:hover {
    background: var(--mosaic-light);
    color: var(--mosaic-primary);
}

.mosaic-action-btn.liked {
    color: #e74c3c;
}

.mosaic-action-btn.favorited {
    color: #f39c12;
}

/* 点赞动画 */
.mosaic-action-btn.liked i {
    animation: mosaic-like-pop 0.4s ease;
}

@keyframes mosaic-like-pop {
    0% { transform: scale(1); }
    50% { transform: scale(1.4); }
    100% { transform: scale(1); }
}

/* ===== 评论区 ===== */
.mosaic-comments-section {
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: 0 2px 8px var(--theme-shadow);
    padding: 24px;
}

body.scifi-mode .mosaic-comments-section {
    border: 1px solid var(--mosaic-border);
}

.mosaic-comments-header {
    font-weight: 600;
    font-size: 18px;
    color: var(--mosaic-text);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.mosaic-comment-form {
    margin-bottom: 24px;
}

.mosaic-comment-textarea {
    width: 100%;
    min-height: 80px;
    padding: 12px 16px;
    border: 1px solid var(--mosaic-border);
    border-radius: 12px;
    font-size: 15px;
    resize: vertical;
    background: var(--card-bg);
    color: var(--card-text);
    transition: all 0.2s;
}

.mosaic-comment-textarea:focus {
    outline: none;
    border-color: var(--mosaic-primary);
    box-shadow: 0 0 0 3px var(--mosaic-light);
}

.mosaic-comment-submit {
    margin-top: 10px;
    padding: 10px 24px;
    background: var(--mosaic-primary);
    color: white;
    border: none;
    border-radius: 20px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.mosaic-comment-submit:hover {
    background: var(--mosaic-hover);
    transform: translateY(-1px);
}

.mosaic-comment-item {
    padding: 16px 0;
    border-bottom: 1px solid var(--mosaic-border);
}

.mosaic-comment-item:last-child {
    border-bottom: none;
}

.mosaic-comment-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.mosaic-comment-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
}

.mosaic-comment-author {
    font-weight: 600;
    color: var(--mosaic-text);
    font-size: 14px;
}

.mosaic-comment-time {
    font-size: 12px;
    color: var(--mosaic-text-light);
}

.mosaic-comment-content {
    font-size: 15px;
    line-height: 1.6;
    color: var(--mosaic-text);
    margin-left: 48px;
}

.mosaic-comment-actions {
    margin-left: 48px;
    margin-top: 8px;
    display: flex;
    gap: 12px;
}

.mosaic-comment-action-btn {
    background: none;
    border: none;
    color: var(--mosaic-text-light);
    font-size: 13px;
    cursor: pointer;
    padding: 0;
    transition: color 0.2s;
}

.mosaic-comment-action-btn:hover {
    color: var(--mosaic-primary);
}

.mosaic-reply-indicator {
    font-size: 13px;
    color: var(--mosaic-text-light);
    margin-left: 48px;
    margin-bottom: 4px;
}

/* ===== 上传区域 ===== */
.mosaic-upload-card {
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: 0 2px 8px var(--theme-shadow);
    padding: 32px;
    margin-bottom: 24px;
}

body.scifi-mode .mosaic-upload-card {
    border: 1px solid var(--mosaic-border);
}

.mosaic-upload-zone {
    border: 2px dashed var(--mosaic-border);
    border-radius: 16px;
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.mosaic-upload-zone:hover,
.mosaic-upload-zone.drag-over {
    border-color: var(--mosaic-primary);
    background: var(--mosaic-light);
}

.mosaic-upload-zone.uploading {
    pointer-events: none;
    opacity: 0.7;
}

.mosaic-upload-zone-icon {
    font-size: 48px;
    color: var(--mosaic-primary);
    margin-bottom: 16px;
}

.mosaic-upload-zone-text {
    font-size: 16px;
    color: var(--mosaic-text);
    margin-bottom: 8px;
}

.mosaic-upload-zone-hint {
    font-size: 13px;
    color: var(--mosaic-text-light);
}

/* ===== 上传进度条 ===== */
.mosaic-upload-progress {
    display: none;
    margin-top: 20px;
}

.mosaic-upload-progress.active {
    display: block;
}

.mosaic-progress-bar-wrapper {
    background: var(--mosaic-light);
    border-radius: 8px;
    height: 8px;
    overflow: hidden;
    margin-bottom: 8px;
}

.mosaic-progress-bar {
    height: 100%;
    background: var(--mosaic-primary);
    border-radius: 8px;
    transition: width 0.3s;
    width: 0%;
}

.mosaic-progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--mosaic-text-light);
}

/* ===== 缩略图预览 ===== */
.mosaic-thumbnail-section {
    margin-top: 24px;
}

.mosaic-thumbnail-preview {
    width: 200px;
    aspect-ratio: 16/9;
    border-radius: 8px;
    overflow: hidden;
    background: var(--mosaic-light);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--mosaic-border);
}

.mosaic-thumbnail-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.mosaic-thumbnail-actions {
    margin-top: 10px;
    display: flex;
    gap: 8px;
}

.mosaic-thumbnail-btn {
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 13px;
    border: 1px solid var(--mosaic-border);
    background: var(--card-bg);
    color: var(--mosaic-text);
    cursor: pointer;
    transition: all 0.2s;
}

.mosaic-thumbnail-btn:hover {
    border-color: var(--mosaic-primary);
    color: var(--mosaic-primary);
}

/* ===== 表单组件 ===== */
.mosaic-form-group {
    margin-bottom: 20px;
}

.mosaic-form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--mosaic-text);
    margin-bottom: 8px;
}

.mosaic-form-label .required {
    color: #e74c3c;
    margin-left: 4px;
}

.mosaic-form-input,
.mosaic-form-textarea,
.mosaic-form-select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--mosaic-border);
    border-radius: 10px;
    font-size: 15px;
    background: var(--card-bg);
    color: var(--card-text);
    transition: all 0.2s;
}

.mosaic-form-input:focus,
.mosaic-form-textarea:focus,
.mosaic-form-select:focus {
    outline: none;
    border-color: var(--mosaic-primary);
    box-shadow: 0 0 0 3px var(--mosaic-light);
}

.mosaic-form-textarea {
    min-height: 100px;
    resize: vertical;
}

.mosaic-form-hint {
    font-size: 12px;
    color: var(--mosaic-text-light);
    margin-top: 4px;
}

/* ===== 按钮 ===== */
.mosaic-submit-btn {
    padding: 12px 32px;
    background: var(--mosaic-primary);
    color: #fff;
    border: none;
    border-radius: 24px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.mosaic-submit-btn:hover:not(:disabled) {
    background: var(--mosaic-hover);
    transform: translateY(-2px);
}

.mosaic-submit-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.mosaic-cancel-btn {
    padding: 12px 32px;
    background: none;
    color: var(--mosaic-text-light);
    border: 1px solid var(--mosaic-border);
    border-radius: 24px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.mosaic-cancel-btn:hover {
    border-color: #e74c3c;
    color: #e74c3c;
}

/* ===== 视频预览 ===== */
.mosaic-video-preview {
    display: none;
    margin-top: 16px;
}

.mosaic-video-preview video {
    max-width: 100%;
    max-height: 300px;
    border-radius: 12px;
}

.mosaic-video-file-info {
    margin-top: 8px;
    font-size: 13px;
    color: var(--mosaic-text-light);
}

/* ===== 返回按钮 ===== */
.mosaic-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--mosaic-text-light);
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 16px;
    transition: color 0.2s;
}

.mosaic-back-btn:hover {
    color: var(--mosaic-primary);
}

/* ===== 空状态 ===== */
.mosaic-empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--mosaic-text-light);
}

.mosaic-empty i {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

/* ===== 分页 ===== */
.mosaic-pagination {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

.mosaic-load-more {
    padding: 12px 32px;
    background: var(--mosaic-primary);
    color: #fff;
    border: none;
    border-radius: 24px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.mosaic-load-more:hover {
    background: var(--mosaic-hover);
    transform: translateY(-2px);
}

/* ===== 动画与过渡 ===== */

/* 卡片加载入场动画 */
.mosaic-card-enter {
    opacity: 0;
    transform: translateY(20px);
    animation: mosaic-fade-up 0.4s ease forwards;
}

@keyframes mosaic-fade-up {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 加载中状态 */
.mosaic-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    color: var(--mosaic-text-light);
}

.mosaic-loading::after {
    content: '';
    width: 24px;
    height: 24px;
    border: 3px solid var(--mosaic-light);
    border-top-color: var(--mosaic-primary);
    border-radius: 50%;
    animation: mosaic-spin 0.8s linear infinite;
    margin-left: 10px;
}

@keyframes mosaic-spin {
    to { transform: rotate(360deg); }
}

/* ===== 响应式 Grid 列数 ===== */
@media (max-width: 1199.98px) {
    .mosaic-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

@media (max-width: 991.98px) {
    .mosaic-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 10px;
    }

    .mosaic-filter-bar {
        padding: 8px 12px;
    }

    .mosaic-detail-header {
        padding: 18px 20px;
    }

    .mosaic-detail-desc {
        padding: 0 20px 18px;
    }

    .mosaic-upload-card {
        padding: 24px;
    }

    .mosaic-upload-zone {
        padding: 36px 20px;
    }
}

@media (max-width: 767.98px) {
    .mosaic-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }

    .mosaic-header-bar {
        flex-wrap: wrap;
        gap: 6px;
        padding: 6px 0;
    }

    .mosaic-header-title {
        font-size: 14px;
    }

    .mosaic-category-tabs {
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        order: 2;
        width: 100%;
    }

    .mosaic-category-tabs::-webkit-scrollbar {
        display: none;
    }

    .mosaic-header-right {
        order: 1;
    }

    .mosaic-filter-bar {
        padding: 8px 12px;
        flex-direction: column;
        align-items: stretch;
    }

    .mosaic-sort-toggle {
        align-self: flex-end;
    }

    .mosaic-video-info {
        padding: 5px 6px;
    }

    .mosaic-video-title {
        font-size: 11px;
    }

    .mosaic-video-author-name {
        display: none;
    }

    .mosaic-video-time {
        display: none;
    }

    /* 播放页全宽无圆角 */
    .mosaic-player-wrapper {
        border-radius: 0;
        margin-left: -12px;
        margin-right: -12px;
    }

    .mosaic-detail-header {
        padding: 16px;
    }

    .mosaic-detail-title {
        font-size: 17px;
    }

    .mosaic-detail-desc {
        padding: 0 16px 16px;
    }

    .mosaic-comments-section {
        padding: 16px;
        border-radius: 12px;
    }

    .mosaic-comment-content {
        margin-left: 0;
        margin-top: 8px;
    }

    .mosaic-comment-actions {
        margin-left: 0;
    }

    /* 移动端固定互动栏 */
    .mosaic-actions-mobile {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: var(--card-bg);
        border-top: 1px solid var(--mosaic-border);
        padding: 10px 16px;
        z-index: 100;
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .mosaic-actions-mobile .mosaic-action-btn {
        font-size: 13px;
        padding: 8px 12px;
    }

    .mosaic-actions-desktop {
        display: none;
    }

    .mosaic-page-content {
        padding-bottom: 70px;
    }

    /* 上传区域自适应 */
    .mosaic-upload-card {
        padding: 20px 16px;
    }

    .mosaic-upload-zone {
        padding: 32px 16px;
    }

    .mosaic-upload-zone-icon {
        font-size: 36px;
    }

    .mosaic-thumbnail-preview {
        width: 160px;
    }

    /* Tab自适应 */
    .mosaic-my-tabs {
        border-radius: 12px;
    }

    .mosaic-my-tab {
        padding: 8px 12px;
        font-size: 13px;
    }
}

@media (max-width: 575.98px) {
    .mosaic-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

    .mosaic-video-author-avatar {
        width: 16px;
        height: 16px;
    }

    .mosaic-video-stats {
        font-size: 9px;
    }
}

@media (min-width: 768px) {
    .mosaic-actions-mobile {
        display: none;
    }
}

/* ===== 播放按钮覆盖层 ===== */
.mosaic-play-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.25);
    border: none;
    cursor: pointer;
    z-index: 2;
    opacity: 0;
    transition: opacity 0.25s ease;
    padding: 0;
}

.mosaic-video-card:hover .mosaic-play-overlay,
.mosaic-play-overlay:focus {
    opacity: 1;
}

/* 移动端始终可见 */
@media (max-width: 767.98px) {
    .mosaic-play-overlay {
        opacity: 1;
        background: rgba(0, 0, 0, 0.15);
    }
}

.mosaic-play-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    color: var(--mosaic-primary);
    font-size: 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    transition: transform 0.2s, background 0.2s;
}

.mosaic-play-overlay:hover .mosaic-play-icon {
    transform: scale(1.12);
    background: #fff;
}

body.scifi-mode .mosaic-play-icon {
    background: rgba(0, 217, 255, 0.85);
    color: #0a0a2e;
    box-shadow: 0 0 20px rgba(0, 217, 255, 0.4);
}

/* 内嵌播放器 */
.mosaic-inline-player {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 5;
    background: #000;
    border-radius: inherit;
    overflow: hidden;
}
.mosaic-inline-player .video-js {
    width: 100% !important;
    height: 100% !important;
}
.mosaic-inline-player-close {
    position: absolute;
    top: 8px; right: 8px;
    z-index: 10;
    background: rgba(0,0,0,0.6);
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 28px; height: 28px;
    font-size: 16px;
    line-height: 28px;
    text-align: center;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s;
}
.mosaic-inline-player:hover .mosaic-inline-player-close {
    opacity: 1;
}