/* 主题颜色变量 - 同时支持亮色和暗色主题 */
:root {
    /* 亮色主题变量 */
    --primary-color: #4e92ff;
    --primary-color-dark: #3a7add;
    --primary-hover: rgba(78, 146, 255, 0.2);
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --surface-color: #ffffff;
    --border-color: #e9ecef;
    --text-primary: #333333;
    --text-secondary: #6c757d;
    --text-muted: #999999;
    --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --card-hover-shadow: 0 6px 18px rgba(0, 0, 0, 0.15);
    --border-radius: 8px;
    
    /* 主题切换过渡 */
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

/* 暗色主题变量 */
.dark-theme {
    --primary-color: #4e92ff;
    --primary-color-dark: #3a7add;
    --primary-hover: rgba(78, 146, 255, 0.2);
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --surface-color: #252525;
    --border-color: #333333;
    --text-primary: #e0e0e0;
    --text-secondary: #aaaaaa;
    --text-muted: #777777;
    --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    --card-hover-shadow: 0 6px 18px rgba(0, 0, 0, 0.4);
}

/* 系统暗色主题支持 */
@media (prefers-color-scheme: dark) {
    :root:not(.light-theme) {
        --primary-color: #4e92ff;
        --primary-color-dark: #3a7add;
        --primary-hover: rgba(78, 146, 255, 0.2);
        --bg-color: #121212;
        --card-bg: #1e1e1e;
        --surface-color: #252525;
        --border-color: #333333;
        --text-primary: #e0e0e0;
        --text-secondary: #aaaaaa;
        --text-muted: #777777;
        --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
        --card-hover-shadow: 0 6px 18px rgba(0, 0, 0, 0.4);
    }
}

/* 基本样式 */
body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    padding-top: 70px;
    font-size: 16px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* 为所有元素添加平滑过渡 */
*, *::before, *::after {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

@media (max-width: 768px) {
    body {
        font-size: 14px;
    }
    
    h1, .h1 { font-size: 1.75rem; }
    h2, .h2 { font-size: 1.5rem; }
    h3, .h3 { font-size: 1.3rem; }
    h4, .h4 { font-size: 1.2rem; }
    h5, .h5 { font-size: 1.1rem; }
    
    .container {
        padding-left: 12px;
        padding-right: 12px;
    }
}

.navbar {
    background-color: var(--surface-color);
    box-shadow: var(--card-shadow);
    border-bottom: 1px solid var(--border-color);
}

.navbar-brand {
    font-weight: 600;
    display: flex;
    align-items: center;
    color: var(--text-primary) !important;
}

.navbar-brand i {
    margin-right: 8px;
    font-size: 1.2rem;
    color: var(--primary-color);
}

.nav-link {
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 4px;
    transition: all 0.2s;
    color: var(--text-secondary) !important;
}

@media (max-width: 992px) {
    .nav-link {
        padding: 6px 12px;
        font-size: 0.95rem;
    }
    
    .navbar-brand {
        font-size: 1.1rem;
    }
}

.nav-link:hover {
    background-color: var(--primary-hover);
    color: var(--text-primary) !important;
}

.nav-link.active {
    color: var(--primary-color) !important;
    background-color: rgba(78, 146, 255, 0.15);
}

.nav-link i {
    margin-right: 5px;
}

.navbar-toggler {
    border-color: var(--border-color);
}

.navbar-toggler-icon {
    filter: invert(0.2);
}

.dark-theme .navbar-toggler-icon {
    filter: invert(0.8);
}

@media (prefers-color-scheme: dark) {
    :root:not(.light-theme) .navbar-toggler-icon {
        filter: invert(0.8);
    }
}

.user-menu {
    display: flex;
    align-items: center;
}

.user-menu .btn {
    margin-left: 10px;
}

/* 表单控件样式 */
.form-control {
    background-color: var(--surface-color);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.form-control:focus {
    background-color: var(--surface-color);
    color: var(--text-primary);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(78, 146, 255, 0.25);
}

.form-control::placeholder {
    color: var(--text-secondary);
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-color-dark);
    border-color: var(--primary-color-dark);
}

@media (max-width: 768px) {
    .user-menu .btn {
        padding: 4px 8px;
        font-size: 0.85rem;
    }
    
    .btn i {
        font-size: 0.9rem;
    }
}

.nav-search-form {
    max-width: 240px;
    margin-right: 15px;
}

@media (max-width: 992px) {
    .nav-search-form {
        max-width: 100%;
        margin: 10px 0;
    }
    
    .nav-search-form .form-control {
        font-size: 0.9rem;
        height: 36px;
    }
    
    .nav-search-form .btn {
        font-size: 0.9rem;
        padding: 6px 10px;
    }
}

footer {
    background-color: var(--surface-color);
    padding: 30px 0;
    margin-top: 3rem;
    border-top: 1px solid var(--border-color);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    margin-bottom: 15px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.text-muted {
    color: var(--text-secondary) !important;
}

.footer-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 10px;
}

@media (max-width: 768px) {
    footer {
        font-size: 0.85rem;
        padding: 15px 0 !important;
        margin-top: 2rem !important;
    }
    
    .footer-links {
        gap: 10px;
        margin-bottom: 10px;
    }
}

.author-link {
    color: var(--text-secondary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    transition: color 0.2s;
    font-size: 0.9rem;
}

.author-link:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.author-link i {
    margin-right: 4px;
    font-size: 0.9em;
}

.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
    overflow: hidden;
    margin-bottom: 10px;
    display: flex;
    flex-direction: column;
    background-color: var(--card-bg);
    position: relative;
    height: 100%;
}

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

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

.card-img-top {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    transition: transform 0.5s ease;
}

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

.duration-badge {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    backdrop-filter: blur(2px);
    z-index: 1;
}

.hd-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: linear-gradient(135deg, #ff6b35, #f7931e);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(2px);
    z-index: 2;
    letter-spacing: 0.5px;
}

.platform-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    backdrop-filter: blur(2px);
    z-index: 1;
}

.card-body {
    padding-top: 8px;
    padding-bottom: 0;
    padding-left: 12px;
    padding-right: 12px;
    display: flex;
    flex-direction: column;
    flex: 1;
    background-color: var(--card-bg);
    border-top: none;
}

.card-info-wrapper {
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: 3px;
}

.card-title {
    min-height: 40px;
    max-height: 40px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    font-weight: 600;
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.4;
    padding-bottom: 2px;
}

.card-meta {
    display: flex;
    flex-direction: column;
    gap: 3px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.card-meta .publish-date {
    display: flex;
    align-items: center;
    gap: 3px;
}

.card-meta .publish-date i {
    font-size: 0.8rem;
}

.card-author {
    display: flex;
    align-items: center;
    gap: 3px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.card-author i {
    font-size: 0.8rem;
}

.card-author a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-author a:hover {
    color: var(--primary-color);
}

.card-stats {
    display: flex;
    justify-content: space-between;
    padding-top: 4px;
    margin-top: 3px;
    border-top: 1px solid var(--border-color);
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.card-stats span {
    display: flex;
    align-items: center;
    gap: 2px;
}

.card-stats i {
    font-size: 0.8rem;
}

/* 分页样式 */
.pagination-container {
    margin-top: 30px;
    background-color: var(--card-bg);
    padding: 15px;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
}

.pagination {
    justify-content: center;
    flex-wrap: wrap;
    gap: 5px;
    margin-bottom: 0;
}

.page-link {
    border-radius: var(--border-radius);
    margin: 0;
    color: var(--primary-color);
    background-color: var(--card-bg);
    box-shadow: none;
    font-weight: 500;
    border: 1px solid var(--border-color);
    min-width: 36px;
    text-align: center;
    padding: 8px 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.page-link:hover {
    background-color: var(--primary-hover);
    border-color: var(--border-color);
    color: var(--primary-color);
}

.page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.page-item.disabled .page-link {
    color: var(--text-muted);
    pointer-events: none;
    background-color: var(--bg-color);
    border-color: var(--border-color);
}

.pagination-info {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 8px;
}

/* 面包屑导航 */
.breadcrumb-section {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 15px 20px;
    box-shadow: var(--card-shadow);
    margin-bottom: 25px;
}

/* 视频详情页组件 */
.video-section, .metadata-section, .embed-section {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    overflow: hidden;
    margin-bottom: 25px;
}

.video-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 比例 */
    background-color: #000;
}

.video-controls-bottom {
    padding: 15px 20px;
    border-top: 1px solid var(--border-color);
    background-color: var(--card-bg);
    display: flex;
    justify-content: flex-end;
}

.hd-toggle-btn {
    background-color: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: var(--card-shadow);
}

.hd-toggle-btn:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--card-hover-shadow);
}

.hd-toggle-btn.active {
    background: linear-gradient(135deg, #ff6b35, #f7931e);
    color: white;
    border-color: transparent;
}

.hd-toggle-btn.active:hover {
    background: linear-gradient(135deg, #e55a2b, #e0841a);
    transform: translateY(-1px);
}

.hd-toggle-btn i {
    font-size: 1.1rem;
}

.hd-toggle-btn span {
    white-space: nowrap;
    font-weight: 500;
}

.video-iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-title {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.video-title h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.video-info {
    padding: 20px;
}

.video-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 15px;
    margin-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.author-info {
    display: flex;
    align-items: center;
}

.author-info .avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 10px;
}

.author-info .avatar i {
    font-size: 20px;
    color: var(--text-secondary);
}

.author-name {
    font-weight: 600;
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.author-meta {
    display: flex;
    gap: 15px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.author-meta span {
    display: flex;
    align-items: center;
    background-color: var(--bg-color);
    padding: 5px 10px;
    border-radius: 20px;
    transition: all 0.2s ease;
}

.author-meta span:hover {
    background-color: var(--primary-hover);
}

.author-meta i {
    margin-right: 6px;
    font-size: 0.95rem;
}

.stats-info {
    display: flex;
    gap: 15px;
}

.stats-item {
    display: flex;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.stats-item i {
    margin-right: 5px;
}

.description-section {
    margin-top: 15px;
}

.description-title {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    color: var(--text-primary);
}

.description-title i {
    margin-right: 8px;
}

.description-content {
    white-space: pre-line;
    line-height: 1.6;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.metadata-section {
    padding: 20px;
}

.metadata-section h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.metadata-item {
    display: flex;
    margin-bottom: 12px;
    font-size: 0.9rem;
}

.metadata-label {
    flex: 0 0 120px;
    font-weight: 500;
    color: var(--text-primary);
}

.metadata-value {
    flex: 1;
    color: var(--text-secondary);
}

.embed-section {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--card-shadow);
}

.embed-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    color: var(--text-primary);
}

.embed-title i {
    margin-right: 8px;
}

.embed-code {
    background-color: var(--bg-color);
    padding: 5px;
    border-radius: 5px;
    border: 1px solid var(--border-color);
    position: relative;
    font-family: monospace;
    font-size: 0.9rem;
    line-height: 1.2;
}

.embed-code pre {
    margin: 0;
    padding: 0;
    background: none;
    border: none;
    white-space: pre-wrap;
    word-break: break-all;
    color: var(--text-primary);
}

.embed-code code {
    display: block;
    padding: 0;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-break: break-all;
}

.copy-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 4px 10px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
    z-index: 1;
    color: var(--text-primary);
}

.copy-btn:hover {
    background-color: var(--bg-color);
    border-color: var(--border-color);
}

.copy-btn:active {
    transform: scale(0.95);
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 20px;
    padding: 8px 16px;
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}

.download-btn i {
    margin-right: 6px;
}

.download-btn:hover {
    background-color: var(--primary-color-dark);
}

.download-btn:active {
    transform: scale(0.98);
}

.empty-state {
    text-align: center;
    padding: 50px 20px;
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
}

.empty-state i {
    font-size: 50px;
    color: var(--text-muted);
    margin-bottom: 15px;
    transition: color 0.3s ease;
}

.empty-state h3 {
    font-weight: 500;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.empty-state p {
    color: var(--text-secondary);
}

.loading-spinner {
    text-align: center;
    padding: 40px 20px;
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
}

.loading-spinner .spinner-border {
    width: 3rem;
    height: 3rem;
    color: var(--primary-color) !important;
}

.loading-spinner p {
    color: var(--text-secondary);
    font-weight: 500;
}

.search-container {
    margin-bottom: 25px;
}

.search-header {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--card-shadow);
    margin-bottom: 20px;
    transition: all 0.3s ease;
}

.search-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.search-filters .form-select,
.search-filters .btn {
    background-color: var(--surface-color);
    border-color: var(--border-color);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.search-filters .form-select:focus {
    box-shadow: 0 0 0 0.25rem rgba(78, 146, 255, 0.25);
    border-color: var(--primary-color);
}

.search-filters .btn-outline-secondary {
    color: var(--text-secondary);
}

.search-filters .btn-outline-secondary:hover,
.search-filters .btn-outline-secondary.active {
    background-color: var(--primary-hover);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

@media (max-width: 768px) {
    .search-header {
        padding: 15px;
    }
    
    .search-header h1 {
        font-size: 1.3rem;
    }
    
    .search-filters {
        flex-direction: column;
    }
    
    .search-filters .form-select {
        width: 100%;
    }
    
    .search-filters .btn-group {
        width: 100%;
        display: flex;
    }
    
    .search-filters .btn-group .btn {
        flex: 1;
    }
    
    .empty-state {
        padding: 30px 15px;
    }
    
    .empty-state i {
        font-size: 40px;
        margin-bottom: 10px;
    }
    
    .empty-state h3 {
        font-size: 1.1rem;
    }
    
    .empty-state p {
        font-size: 0.9rem;
    }
    
    .loading-spinner {
        padding: 25px 15px;
    }
    
    .loading-spinner .spinner-border {
        width: 2.5rem;
        height: 2.5rem;
    }
}


.author-header {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: var(--card-shadow);
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.author-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    background-color: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 2rem;
    overflow: hidden;
}

.author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.author-info {
    flex: 1;
}

.author-name {
    font-weight: 600;
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.author-meta {
    display: flex;
    gap: 15px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.author-meta span {
    display: flex;
    align-items: center;
    background-color: var(--bg-color);
    padding: 5px 10px;
    border-radius: 20px;
    transition: all 0.2s ease;
}

.author-meta span:hover {
    background-color: var(--primary-hover);
}

.author-meta i {
    margin-right: 6px;
    font-size: 0.95rem;
}

.header-section {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--card-shadow);
    margin-bottom: 25px;
}

.btn-group .btn {
    border-radius: 20px;
    padding: 8px 16px;
    font-weight: 500;
    transition: all 0.2s;
}

.count-badge {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 6px 15px;
    font-weight: 500;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    white-space: nowrap;
}

.theme-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 45px;
    height: 45px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    z-index: 1000;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: rotate(30deg);
    background-color: var(--primary-color-dark);
}

.theme-toggle i {
    font-size: 1.2rem;
}

.video-grid .row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -10px;
}

.video-grid .col {
    flex: 0 0 100%;
    max-width: 100%;
    padding: 0 10px;
    margin-bottom: 20px;
}

@media (min-width: 576px) {
    .video-grid .col {
        flex: 0 0 50%;
        max-width: 50%;
    }
}

@media (min-width: 992px) {
    .video-grid .col {
        flex: 0 0 33.33%;
        max-width: 33.33%;
    }
}

@media (min-width: 1200px) {
    .video-grid .col {
        flex: 0 0 25%;
        max-width: 25%;
    }
}

@media (min-width: 992px) {
    .video-detail-container {
        display: flex;
        flex-wrap: wrap;
        margin: 0 -12px;
    }
    
    .video-primary {
        flex: 0 0 65%;
        max-width: 65%;
        padding: 0 12px;
    }
    
    .video-sidebar {
        flex: 0 0 35%;
        max-width: 35%;
        padding: 0 12px;
    }
    
    .video-section {
        margin-bottom: 24px;
    }
    
    .info-row {
        margin-top: 24px;
    }
    
    .metadata-section {
        height: 100%;
    }
}

@media (max-width: 768px) {
    .breadcrumb-section, .video-section, 
    .metadata-section, .embed-section {
        margin-bottom: 15px;
    }
    
    .breadcrumb-section {
        padding: 10px 15px;
    }
    
    .breadcrumb-section .breadcrumb {
        font-size: 0.85rem;
    }
    
    .video-title {
        padding: 15px;
    }
    
    .video-title h1 {
        font-size: 1.2rem;
        margin-bottom: 3px;
    }
    
    .video-info, .metadata-section, .embed-section {
        padding: 15px;
    }
    
    .video-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
        padding-bottom: 10px;
    }
    
    .stats-info {
        width: 100%;
        justify-content: space-between;
    }
    
    .stats-item {
        font-size: 0.8rem;
    }
    
    .description-title {
        font-size: 1rem;
    }
    
    .description-content {
        font-size: 0.9rem;
    }
    
    .metadata-section h3, .embed-title {
        font-size: 1.1rem;
        margin-bottom: 15px;
        padding-bottom: 8px;
    }
    
    .metadata-item {
        font-size: 0.85rem;
        margin-bottom: 10px;
        flex-direction: column;
    }
    
    .metadata-label {
        flex: none;
        margin-bottom: 4px;
    }
    
    .card-title {
        min-height: 36px;
        max-height: 36px;
        font-size: 0.85rem;
    }
    
    .pagination-container {
        padding: 10px;
        margin-top: 20px;
    }
    
    .pagination {
        gap: 3px;
    }
    
    .page-link {
        min-width: 32px;
        height: 32px;
        padding: 6px;
        font-size: 0.85rem;
    }
    
    .page-item.page-number {
        display: none;
    }
    
    .page-item.active,
    .page-item.current-adjacent {
        display: list-item;
    }
    
    .pagination-info {
        font-size: 0.8rem;
        margin-top: 6px;
    }
    
    .g-4 {
        --bs-gutter-x: 0.5rem;
        --bs-gutter-y: 0.5rem;
    }
    
    .list-view .card-img-container {
        width: 120px;
        min-width: 120px;
        height: 90px;
    }
    
    .list-view .card-body {
        padding: 10px;
    }
    
    .list-view .card-stats {
        gap: 10px;
    }

    .author-header {
        padding: 15px;
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }
    
    .author-avatar {
        width: 60px;
        height: 60px;
        margin: 0 auto;
    }
    
    .author-name {
        font-size: 1.3rem;
        margin-bottom: 10px;
    }
    
    .author-meta {
        gap: 8px;
        font-size: 0.85rem;
    }
    
    .author-meta span {
        padding: 4px 8px;
    }
    
    .author-meta i {
        margin-right: 4px;
        font-size: 0.9rem;
    }
    
    .header-section {
        padding: 15px;
        margin-bottom: 15px;
    }
    
    .btn-group .btn {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
    
    .count-badge {
        padding: 4px 10px;
        font-size: 0.8rem;
    }
    
    .theme-toggle {
        bottom: 15px;
        right: 15px;
        width: 40px;
        height: 40px;
    }
    
    .video-controls-bottom {
        padding: 12px 15px;
        justify-content: center;
    }
    
    .hd-toggle-btn {
        padding: 8px 14px;
        font-size: 0.85rem;
        gap: 6px;
    }
    
    .hd-toggle-btn i {
        font-size: 1rem;
    }
}

@media (min-width: 992px) {
    .desktop-list-view .row {
        display: block;
    }
    
    .desktop-list-view .col {
        width: 100%;
        max-width: 100%;
        flex: 0 0 100%;
        margin-bottom: 15px;
    }
    
    .desktop-list-view .card {
        flex-direction: row;
        height: auto;
        margin-bottom: 0;
    }
    
    .desktop-list-view .card-img-container {
        width: 320px;
        min-width: 320px;
        height: 180px;
        flex-shrink: 0;
    }
    
    .desktop-list-view .card-img-top {
        height: 100%;
        width: 100%;
    }
    
    .desktop-list-view .card-body {
        padding-top: 12px;
        padding-bottom: 0;
        padding-left: 15px;
        padding-right: 15px;
    }
    
    .desktop-list-view .card-title {
        min-height: auto;
        max-height: none;
        font-size: 0.9rem;
        margin-bottom: 8px;
    }
    
    .desktop-list-view .card-meta {
        font-size: 0.85rem;
        margin-bottom: 4px;
    }
    
    .desktop-list-view .card-author {
        font-size: 0.85rem;
    }
    
    .desktop-list-view .card-stats {
        font-size: 0.8rem;
        padding-top: 8px;
        margin-top: 6px;
    }
    
    .desktop-list-view .platform-badge {
        top: 15px;
        left: 15px;
        padding: 4px 8px;
        font-size: 13px;
    }
    
    .desktop-list-view .duration-badge {
        bottom: 15px;
        right: 15px;
        padding: 4px 8px;
        font-size: 13px;
    }
    
    .desktop-list-view .hd-badge {
        top: 15px;
        right: 15px;
        padding: 4px 8px;
        font-size: 12px;
    }
}

.embed-container {
    margin-top: 20px;
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%;
    overflow: hidden;
    border-radius: var(--border-radius);
    background-color: #000;
    box-shadow: var(--card-shadow);
}

.embed-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.control-panel {
    margin-top: 20px;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--card-bg);
    box-shadow: var(--card-shadow);
}

.btn-group {
    margin-bottom: 10px;
}

.code-example {
    margin-top: 30px;
    background-color: var(--card-bg);
    padding: 15px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--card-shadow);
}

.code-example h3 {
    color: var(--text-primary);
    margin-bottom: 15px;
}

.code-example p {
    color: var(--text-secondary);
}

pre {
    margin: 0;
    padding: 10px;
    background-color: var(--bg-color);
    border-radius: 4px;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    overflow-x: auto;
}

.form-range::-webkit-slider-thumb {
    background-color: var(--primary-color);
}

.form-range::-moz-range-thumb {
    background-color: var(--primary-color);
}

.form-range::-ms-thumb {
    background-color: var(--primary-color);
}

.form-range::-webkit-slider-runnable-track {
    background-color: var(--border-color);
}

.form-range::-moz-range-track {
    background-color: var(--border-color);
}

.form-range::-ms-track {
    background-color: var(--border-color);
}

.form-control-color {
    background-color: var(--surface-color);
    border-color: var(--border-color);
}

.input-group .form-control-color {
    width: 45px;
}

.breadcrumb {
    background-color: transparent;
    margin-bottom: 0;
    padding: 0;
}

.breadcrumb-item {
    color: var(--text-secondary);
}

.breadcrumb-item + .breadcrumb-item::before {
    color: var(--text-secondary);
}

.breadcrumb-item a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s;
}

.breadcrumb-item a:hover {
    color: var(--primary-color-dark);
    text-decoration: underline;
}

.breadcrumb-item.active {
    color: var(--text-secondary);
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

::selection {
    background-color: var(--primary-hover);
    color: var(--text-primary);
}

.table {
    color: var(--text-primary);
    border-color: var(--border-color);
}

.table th,
.table td {
    border-color: var(--border-color);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: var(--bg-color);
}

.table-hover tbody tr:hover {
    background-color: var(--primary-hover);
}

.text-muted {
    color: var(--text-secondary) !important;
}

.badge {
    transition: background-color 0.3s ease;
}

.tooltip .tooltip-inner {
    background-color: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.tooltip .arrow::before {
    border-top-color: var(--surface-color);
}

.dropdown-menu {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    box-shadow: var(--card-shadow);
}

.dropdown-item {
    color: var(--text-primary);
}

.dropdown-item:hover, 
.dropdown-item:focus {
    background-color: var(--primary-hover);
    color: var(--text-primary);
}

.dropdown-divider {
    border-top-color: var(--border-color);
}

.modal-content {
    background-color: var(--card-bg);
    border-color: var(--border-color);
}

.modal-header,
.modal-footer {
    border-color: var(--border-color);
}

.modal-title {
    color: var(--text-primary);
}

.close {
    color: var(--text-secondary);
}

.close:hover {
    color: var(--text-primary);
}

/* 作者页面筛选布局优化 */
@media (max-width: 768px) {
    .author-filter-container {
        flex-direction: column;
        align-items: flex-start !important;
        gap: 15px;
    }
    
    .author-filter-container .btn-group {
        width: 100%;
        margin-right: 0 !important;
    }
    
    .author-filter-container .btn-group .btn {
        flex: 1;
        padding: 8px 5px;
        font-size: 0.85rem;
    }
    
    .author-filter-container .count-badge {
        align-self: flex-start;
    }
}

/* 视频详情页 - 视频信息区块 */
.video-metadata {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    padding: 20px;
    margin-top: 20px;
}

.video-metadata h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.video-metadata-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px 24px;
}

.video-metadata-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.video-metadata-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.video-metadata-value {
    font-size: 0.9rem;
    color: var(--text-primary);
    word-break: break-all;
}

@media (min-width: 576px) {
    .video-metadata-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 575px) {
    .video-metadata {
        padding: 15px;
    }
    
    .video-metadata h3 {
        font-size: 1rem;
        margin-bottom: 12px;
        padding-bottom: 8px;
    }
    
    .video-metadata-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px 16px;
    }
    
    .video-metadata-label {
        font-size: 0.7rem;
    }
    
    .video-metadata-value {
        font-size: 0.85rem;
    }
}

/* 侧边栏相似视频样式 */
.similar-videos-sidebar {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    padding: 20px;
    height: fit-content;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
    position: sticky;
    top: 85px;
}

.similar-videos-sidebar h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.similar-videos-sidebar h3 i {
    color: var(--primary-color);
}

.similar-videos-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.similar-video-item {
    background-color: var(--surface-color);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.2s ease;
}

.similar-video-item:hover {
    transform: translateX(4px);
    box-shadow: var(--card-shadow);
}

.similar-video-link {
    display: flex;
    gap: 12px;
    text-decoration: none;
    color: inherit;
}

.similar-video-thumb {
    position: relative;
    width: 120px;
    min-width: 120px;
    height: 68px;
    overflow: hidden;
    border-radius: 6px;
    background-color: var(--bg-color);
}

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

.similar-video-item:hover .similar-video-thumb img {
    transform: scale(1.05);
}

.similar-video-thumb .duration-badge {
    position: absolute;
    bottom: 4px;
    right: 4px;
    font-size: 10px;
    padding: 1px 4px;
}

.similar-video-thumb .hd-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    font-size: 9px;
    padding: 1px 4px;
}

.similar-video-info {
    flex: 1;
    min-width: 0;
    padding: 4px 8px 4px 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.similar-video-info .similar-video-title {
    font-size: 0.8rem;
    font-weight: 500;
    line-height: 1.3;
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    min-height: auto;
    max-height: none;
    color: var(--text-primary);
    transition: color 0.2s;
}

.similar-video-item:hover .similar-video-info .similar-video-title {
    color: var(--primary-color);
}

.similar-video-meta,
.similar-video-stats {
    font-size: 0.7rem;
    color: var(--text-muted);
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.similar-video-meta i,
.similar-video-stats i {
    font-size: 0.65rem;
}

/* 移动端相似视频部分样式 */
.similar-videos-section-mobile {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    padding: 15px;
}

.similar-videos-section-mobile .section-header {
    margin-bottom: 15px;
}

.similar-videos-section-mobile .section-title {
    font-size: 1.1rem;
}

.similar-videos-section-mobile .section-title i {
    font-size: 1rem;
}

/* 相似视频部分样式 */
.similar-videos-section {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
}

.section-title i {
    color: var(--primary-color);
    font-size: 1.3rem;
}

.similar-video-card {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.similar-video-card .card-img-container {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/9;
    background-color: var(--bg-color);
}

.similar-video-card .card-img-top {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.similar-video-card:hover .card-img-top {
    transform: scale(1.05);
}

.similar-video-title {
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 1.4;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    min-height: 2.8em;
    max-height: 2.8em;
    color: var(--text-primary);
    transition: color 0.2s;
}

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

.similar-video-card .card-body {
    padding: 10px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.similar-video-card .card-meta {
    margin-top: auto;
    font-size: 0.75rem;
}

.similar-video-card .card-stats {
    margin-top: 6px;
    padding-top: 6px;
    border-top: 1px solid var(--border-color);
    font-size: 0.75rem;
}

/* 移动端优化 */
@media (max-width: 768px) {
    .similar-videos-section {
        margin-top: 30px;
        padding-top: 20px;
    }
    
    .section-title {
        font-size: 1.25rem;
    }
    
    .section-title i {
        font-size: 1.1rem;
    }
    
    .similar-video-title {
        font-size: 0.85rem;
        min-height: 2.5em;
        max-height: 2.5em;
    }
    
    .similar-video-card .card-body {
        padding: 8px;
    }
    
    .similar-video-card .card-meta,
    .similar-video-card .card-stats {
        font-size: 0.7rem;
    }
}

/* 桌面端优化 - 确保相似视频卡片在小屏幕上也能正常显示 */
@media (min-width: 1200px) {
    .similar-videos-section .row-cols-xl-6 .col {
        flex: 0 0 16.666667%;
        max-width: 16.666667%;
    }
}

@media (min-width: 992px) and (max-width: 1199px) {
    .similar-videos-section .row-cols-lg-4 .col {
        flex: 0 0 25%;
        max-width: 25%;
    }
}

@media (min-width: 768px) and (max-width: 991px) {
    .similar-videos-section .row-cols-md-4 .col {
        flex: 0 0 25%;
        max-width: 25%;
    }
}

@media (min-width: 576px) and (max-width: 767px) {
    .similar-videos-section .row-cols-sm-3 .col {
        flex: 0 0 33.333333%;
        max-width: 33.333333%;
    }
}

@media (max-width: 575px) {
    .similar-videos-section .row-cols-2 .col {
        flex: 0 0 50%;
        max-width: 50%;
    }
}