:root {
    --primary-color: #FF6B6B;
    --primary-dark: #EE5A5A;
    --secondary-color: #4ECDC4;
    --accent-color: #FFE66D;
    --bg-dark: #1A1A2E;
    --bg-card: #16213E;
    --bg-hover: #0F3460;
    --text-primary: #FFFFFF;
    --text-secondary: #A0A0A0;
    --border-color: #2A2A4A;
    --gradient-primary: linear-gradient(135deg, #FF6B6B 0%, #EE5A5A 100%);
    --gradient-secondary: linear-gradient(135deg, #4ECDC4 0%, #3DBDB5 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    background: linear-gradient(135deg, var(--bg-dark) 0%, #16213E 100%);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 28px;
}

.logo-text {
    font-size: 24px;
    font-weight: bold;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-badge {
    font-size: 12px;
    color: var(--accent-color);
    background: rgba(255, 230, 109, 0.1);
    padding: 2px 8px;
    border-radius: 10px;
}

.main-nav {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 16px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.search-box {
    display: flex;
    background: var(--bg-card);
    border-radius: 25px;
    padding: 5px 15px;
    border: 1px solid var(--border-color);
}

.search-input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    padding: 8px 10px;
    width: 150px;
}

.search-input::placeholder {
    color: var(--text-secondary);
}

.search-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

.login-btn {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 8px 20px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(255, 107, 107, 0.4);
}

.hero-section {
    position: relative;
    height: 450px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.3) 0%, rgba(78, 205, 196, 0.3) 100%);
    backdrop-filter: blur(20px);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding-top: 120px;
}

.hero-title {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 20px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.6s ease;
}

.hero-desc {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 30px;
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    animation: fadeInUp 0.6s ease 0.4s both;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    padding: 12px 30px;
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(255, 107, 107, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    text-decoration: none;
    padding: 12px 30px;
    border-radius: 25px;
    font-weight: 500;
    border: 2px solid var(--primary-color);
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-secondary:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.section-title {
    font-size: 28px;
    font-weight: bold;
}

.view-all {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
}

.view-all:hover {
    text-decoration: underline;
}

.featured-section {
    padding: 50px 0;
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.featured-card {
    background: var(--bg-card);
    border-radius: 15px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.featured-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 15px 40px rgba(255, 107, 107, 0.2);
}

.card-thumbnail {
    position: relative;
    height: 250px;
    overflow: hidden;
}

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

.featured-card:hover .card-thumbnail img {
    transform: scale(1.1);
}

.duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 12px;
}

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(255, 107, 107, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    opacity: 0;
    transition: all 0.3s ease;
}

.featured-card:hover .play-btn {
    opacity: 1;
}

.card-content {
    padding: 20px;
}

.card-title {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.8;
}

.card-meta {
    display: flex;
    gap: 15px;
    font-size: 12px;
    color: var(--text-secondary);
}

.categories-section {
    padding: 50px 0;
    background: rgba(22, 33, 62, 0.5);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.category-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.category-card:hover {
    transform: translateY(-5px);
    border-color: var(--secondary-color);
    box-shadow: 0 10px 30px rgba(78, 205, 196, 0.2);
}

.category-icon {
    font-size: 40px;
    margin-bottom: 15px;
}

.category-name {
    display: block;
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 5px;
}

.category-count {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
}

.videos-section {
    padding: 50px 0;
}

.videos-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.video-card {
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.video-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.video-thumbnail {
    position: relative;
    height: 150px;
    overflow: hidden;
}

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

.video-card:hover .video-thumbnail img {
    transform: scale(1.1);
}

.video-duration {
    position: absolute;
    bottom: 5px;
    right: 5px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 3px 8px;
    border-radius: 3px;
    font-size: 11px;
}

.video-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    background: rgba(255, 107, 107, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    opacity: 0;
    transition: all 0.3s ease;
}

.video-card:hover .video-play {
    opacity: 1;
}

.video-card h3 {
    font-size: 14px;
    font-weight: 500;
    margin: 12px;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.video-desc {
    font-size: 12px;
    color: var(--text-secondary);
    margin: 0 12px 10px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.video-meta {
    display: flex;
    gap: 10px;
    font-size: 11px;
    color: var(--text-secondary);
    margin: 0 12px 12px;
}

.ranking-section {
    padding: 50px 0;
    background: rgba(22, 33, 62, 0.5);
}

.ranking-list {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 20px;
    border: 1px solid var(--border-color);
}

.ranking-item {
    display: flex;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

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

.ranking-item:hover {
    background: var(--bg-hover);
    padding-left: 10px;
    border-radius: 8px;
}

.rank {
    width: 30px;
    height: 30px;
    background: var(--bg-hover);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin-right: 15px;
    font-size: 14px;
}

.rank.top {
    background: var(--gradient-primary);
    color: white;
}

.ranking-thumbnail {
    width: 80px;
    height: 50px;
    border-radius: 5px;
    overflow: hidden;
    margin-right: 15px;
}

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

.ranking-info h3 {
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.ranking-info p {
    font-size: 12px;
    color: var(--text-secondary);
}

.ranking-arrow {
    margin-left: auto;
    color: var(--text-secondary);
    font-size: 18px;
}

.ranking-item:hover .ranking-arrow {
    color: var(--primary-color);
}

.page-banner {
    padding: 40px 0;
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-dark) 100%);
    border-bottom: 1px solid var(--border-color);
}

.page-title {
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 10px;
}

.page-desc {
    font-size: 16px;
    color: var(--text-secondary);
}

.filter-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

.filter-tabs {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-tab {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.filter-tab.active,
.filter-tab:hover {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--primary-color);
}

.sort-select {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: 5px;
    outline: none;
    cursor: pointer;
}

.videos-grid {
    display: flex;
    gap: 30px;
}

.videos-main {
    flex: 1;
}

.videos-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.video-card.featured {
    grid-column: span 2;
    display: flex;
    gap: 20px;
}

.video-card.featured .video-thumbnail {
    width: 400px;
    height: 225px;
    flex-shrink: 0;
}

.video-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.video-tags {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.tag {
    background: rgba(255, 107, 107, 0.2);
    color: var(--primary-color);
    padding: 3px 10px;
    border-radius: 10px;
    font-size: 12px;
}

.watch-btn {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 500;
    width: fit-content;
    transition: all 0.3s ease;
}

.watch-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(255, 107, 107, 0.4);
}

.pagination-section {
    text-align: center;
    margin-top: 40px;
}

.pagination {
    display: inline-flex;
    gap: 10px;
}

.page-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 10px 15px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.page-btn.active,
.page-btn:hover {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--primary-color);
}

.videos-sidebar {
    width: 300px;
    flex-shrink: 0;
}

.sidebar-section {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}

.sidebar-title {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 15px;
}

.hot-list {
    list-style: none;
}

.hot-list li {
    display: flex;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.hot-list li:last-child {
    border-bottom: none;
}

.hot-list li:hover {
    background: var(--bg-hover);
    padding-left: 5px;
    border-radius: 5px;
}

.hot-thumbnail {
    width: 60px;
    height: 40px;
    border-radius: 5px;
    overflow: hidden;
    flex-shrink: 0;
}

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

.hot-info a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 13px;
    display: block;
    margin-bottom: 5px;
}

.hot-info span {
    font-size: 11px;
    color: var(--text-secondary);
}

.category-list {
    list-style: none;
}

.category-list li {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.category-list li:last-child {
    border-bottom: none;
}

.category-list li:hover {
    background: var(--bg-hover);
    padding-left: 5px;
    border-radius: 5px;
}

.category-list li a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
}

.category-list li span {
    color: var(--text-secondary);
    font-size: 12px;
}

.category-featured {
    margin-top: 15px;
    border-radius: 8px;
    overflow: hidden;
    height: 80px;
}

.category-featured img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.subcategories-section {
    padding: 50px 0;
}

.subcategories-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
}

.subcategory-card {
    background: var(--bg-card);
    border-radius: 10px;
    padding: 15px;
    text-align: center;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.subcategory-card:hover {
    transform: translateY(-3px);
    border-color: var(--secondary-color);
}

.subcategory-icon {
    font-size: 28px;
    margin-bottom: 8px;
}

.subcategory-name {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 5px;
}

.subcategory-count {
    display: block;
    font-size: 11px;
    color: var(--text-secondary);
}

.quick-browse-section {
    padding: 50px 0;
    background: rgba(22, 33, 62, 0.5);
}

.quick-browse-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 15px;
}

.quick-browse-card {
    background: var(--bg-card);
    border-radius: 10px;
    padding: 15px;
    text-align: center;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.quick-browse-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent-color);
}

.quick-browse-icon {
    font-size: 28px;
    margin-bottom: 8px;
}

.quick-browse-name {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 5px;
}

.quick-browse-count {
    display: block;
    font-size: 11px;
    color: var(--text-secondary);
}

.about-section {
    padding: 60px 0;
}

.about-content {
    display: flex;
    gap: 50px;
    align-items: center;
}

.about-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--primary-color);
    flex-shrink: 0;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-text h2 {
    font-size: 32px;
    margin-bottom: 20px;
}

.about-text p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.8;
}

.about-stats {
    display: flex;
    gap: 30px;
    margin-top: 30px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 28px;
    font-weight: bold;
    color: var(--primary-color);
}

.stat-label {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
}

.features-section {
    padding: 60px 0;
    background: rgba(22, 33, 62, 0.5);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background: var(--bg-card);
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--secondary-color);
    box-shadow: 0 10px 30px rgba(78, 205, 196, 0.2);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 15px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.team-section {
    padding: 60px 0;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.team-card {
    background: var(--bg-card);
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.team-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.team-avatar {
    font-size: 64px;
    margin-bottom: 20px;
}

.team-card h3 {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 10px;
}

.team-role {
    font-size: 14px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.team-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.contact-section {
    padding: 60px 0;
    background: rgba(22, 33, 62, 0.5);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.contact-item {
    display: flex;
    gap: 15px;
}

.contact-icon {
    font-size: 28px;
    flex-shrink: 0;
}

.contact-detail h4 {
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 5px;
}

.contact-detail p {
    font-size: 14px;
    color: var(--text-secondary);
}

.contact-form {
    background: var(--bg-card);
    border-radius: 15px;
    padding: 30px;
    border: 1px solid var(--border-color);
}

.contact-form h3 {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 20px;
}

.form-input,
.form-textarea {
    width: 100%;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 12px 15px;
    border-radius: 8px;
    margin-bottom: 15px;
    outline: none;
    font-size: 14px;
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--primary-color);
}

.form-textarea {
    height: 120px;
    resize: none;
}

.join-section {
    padding: 60px 0;
    text-align: center;
}

.join-content {
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(255, 107, 107, 0.1) 100%);
    border-radius: 20px;
    padding: 50px;
    border: 1px solid var(--border-color);
}

.join-content h2 {
    font-size: 32px;
    margin-bottom: 20px;
}

.join-content p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.join-links {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.footer {
    background: #16213E;
    border-top: 1px solid var(--border-color);
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 30px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.footer-section p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.footer-section h4 {
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 15px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        gap: 15px;
    }

    .main-nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-desc {
        font-size: 16px;
    }

    .featured-grid {
        grid-template-columns: 1fr;
    }

    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .videos-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .videos-grid {
        flex-direction: column;
    }

    .videos-sidebar {
        width: 100%;
    }

    .videos-list {
        grid-template-columns: 1fr;
    }

    .video-card.featured {
        flex-direction: column;
    }

    .video-card.featured .video-thumbnail {
        width: 100%;
        height: 200px;
    }

    .subcategories-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .quick-browse-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .about-content {
        flex-direction: column;
        text-align: center;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .team-grid {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-stats {
        flex-wrap: wrap;
        justify-content: center;
    }
}