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

      :root {
        --primary-color: #FF6B6B;
        --secondary-color: #4ECDC4;
        --text-dark: #2C3E50;
        --text-light: #7F8C8D;
        --bg-light: #F8F9FA;
        --white: #FFFFFF;
        --shadow: 0 2px 8px rgba(0,0,0,0.1);
        --shadow-hover: 0 4px 16px rgba(0,0,0,0.15);
      }

      body {
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
        color: var(--text-dark);
        line-height: 1.6;
        background: var(--bg-light);
      }

      .navbar {
        background: var(--white);
        box-shadow: var(--shadow);
        position: sticky;
        top: 0;
        z-index: 1000;
      }

      .nav-container {
        max-width: 1400px;
        margin: 0 auto;
        padding: 1rem 2rem;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 2rem;
      }

      .brand {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        font-size: 1.5rem;
        font-weight: bold;
        color: var(--primary-color);
        cursor: pointer;
      }

      .brand-icon {
        font-size: 2rem;
      }

      .main-nav {
        display: flex;
        gap: 2rem;
        flex: 1;
        justify-content: center;
      }

      .nav-link {
        text-decoration: none;
        color: var(--text-dark);
        font-weight: 500;
        transition: color 0.3s;
        position: relative;
        padding: 0.5rem 0;
      }

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

      .nav-link.active::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        height: 2px;
        background: var(--primary-color);
      }

      .nav-actions {
        display: flex;
        align-items: center;
        gap: 1rem;
      }

      .search-box {
        display: flex;
        align-items: center;
        background: var(--bg-light);
        border-radius: 24px;
        padding: 0.5rem 1rem;
        gap: 0.5rem;
      }

      .search-box input {
        border: none;
        background: transparent;
        outline: none;
        width: 200px;
      }

      .search-btn {
        background: none;
        border: none;
        cursor: pointer;
        font-size: 1.2rem;
      }

      .upload-btn {
        background: var(--primary-color);
        color: white;
        border: none;
        padding: 0.5rem 1.5rem;
        border-radius: 24px;
        cursor: pointer;
        font-weight: 500;
        transition: transform 0.2s;
      }

      .upload-btn:hover {
        transform: translateY(-2px);
      }

      .user-avatar {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        background: var(--secondary-color);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.5rem;
        cursor: pointer;
      }

      .main-container {
        max-width: 1400px;
        margin: 0 auto;
        padding: 2rem;
      }

      .content-section {
        display: none;
      }

      .content-section.active {
        display: block;
      }

      .hero-section {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 4rem;
        align-items: center;
        padding: 4rem 0;
        min-height: 500px;
      }

      .hero-title {
        font-size: 3.5rem;
        font-weight: bold;
        margin-bottom: 1rem;
        background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
      }

      .hero-subtitle {
        font-size: 1.2rem;
        color: var(--text-light);
        margin-bottom: 2rem;
      }

      .hero-actions {
        display: flex;
        gap: 1rem;
      }

      .cta-btn {
        padding: 1rem 2rem;
        border: none;
        border-radius: 30px;
        font-size: 1rem;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.3s;
      }

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

      .cta-btn.secondary {
        background: transparent;
        color: var(--primary-color);
        border: 2px solid var(--primary-color);
      }

      .cta-btn:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow-hover);
      }

      .hero-visual {
        position: relative;
        height: 400px;
      }

      .floating-card {
        position: absolute;
        width: 180px;
        height: 240px;
        background: white;
        border-radius: 16px;
        box-shadow: var(--shadow-hover);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        animation: float 3s ease-in-out infinite;
      }

      .floating-card.card-1 {
        top: 0;
        left: 50%;
        transform: translateX(-50%);
        animation-delay: 0s;
      }

      .floating-card.card-2 {
        bottom: 50px;
        left: 0;
        animation-delay: 1s;
      }

      .floating-card.card-3 {
        bottom: 50px;
        right: 0;
        animation-delay: 2s;
      }

      .card-thumb {
        font-size: 4rem;
        margin-bottom: 1rem;
      }

      .card-play {
        font-size: 2rem;
        opacity: 0.7;
      }

      @keyframes float {
        0%, 100% { transform: translateY(0); }
        50% { transform: translateY(-20px); }
      }

      .filter-section {
        margin: 3rem 0;
      }

      .section-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 2rem;
      }

      .section-header h2 {
        font-size: 2rem;
        color: var(--text-dark);
      }

      .view-all {
        color: var(--primary-color);
        text-decoration: none;
        font-weight: 500;
        transition: transform 0.3s;
        display: inline-block;
      }

      .view-all:hover {
        transform: translateX(5px);
      }

      .tag-list {
        display: flex;
        gap: 1rem;
        flex-wrap: wrap;
      }

      .tag {
        padding: 0.5rem 1.5rem;
        border: 2px solid #E0E0E0;
        background: white;
        border-radius: 24px;
        cursor: pointer;
        transition: all 0.3s;
        font-weight: 500;
      }

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

      .videos-section {
        margin: 3rem 0;
      }

      .video-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
        gap: 2rem;
      }

      .video-card {
        background: white;
        border-radius: 16px;
        overflow: hidden;
        box-shadow: var(--shadow);
        transition: all 0.3s;
        cursor: pointer;
      }

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

      .video-thumb {
        position: relative;
        width: 100%;
        padding-top: 56.25%;
        overflow: hidden;
      }

      .thumb-bg {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 5rem;
      }

      .video-duration {
        position: absolute;
        bottom: 8px;
        right: 8px;
        background: rgba(0,0,0,0.8);
        color: white;
        padding: 4px 8px;
        border-radius: 4px;
        font-size: 0.85rem;
      }

      .video-overlay {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0,0,0,0.3);
        display: flex;
        align-items: center;
        justify-content: center;
        opacity: 0;
        transition: opacity 0.3s;
      }

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

      .play-btn {
        width: 60px;
        height: 60px;
        background: white;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.5rem;
      }

      .video-info {
        padding: 1rem;
        display: flex;
        gap: 0.75rem;
      }

      .creator-thumb {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        background: var(--secondary-color);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.5rem;
        flex-shrink: 0;
      }

      .video-meta h3 {
        font-size: 1rem;
        margin-bottom: 0.5rem;
        overflow: hidden;
        text-overflow: ellipsis;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
      }

      .creator {
        color: var(--text-light);
        font-size: 0.9rem;
        margin-bottom: 0.5rem;
      }

      .video-stats {
        display: flex;
        gap: 1rem;
        font-size: 0.85rem;
        color: var(--text-light);
      }

      .section-title {
        text-align: center;
        margin-bottom: 3rem;
      }

      .section-title h1 {
        font-size: 2.5rem;
        margin-bottom: 0.5rem;
      }

      .section-title p {
        color: var(--text-light);
        font-size: 1.1rem;
      }

      .trending-grid {
        display: grid;
        gap: 2rem;
      }

      .trending-card {
        background: white;
        border-radius: 16px;
        padding: 2rem;
        display: flex;
        gap: 2rem;
        align-items: center;
        box-shadow: var(--shadow);
        transition: all 0.3s;
        cursor: pointer;
        position: relative;
      }

      .trending-card:hover {
        transform: translateX(8px);
        box-shadow: var(--shadow-hover);
      }

      .rank-badge {
        width: 60px;
        height: 60px;
        border-radius: 50%;
        background: #E0E0E0;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.5rem;
        font-weight: bold;
        flex-shrink: 0;
      }

      .rank-badge.gold {
        background: linear-gradient(135deg, #FFD700, #FFA500);
        color: white;
      }

      .rank-badge.silver {
        background: linear-gradient(135deg, #C0C0C0, #A8A8A8);
        color: white;
      }

      .rank-badge.bronze {
        background: linear-gradient(135deg, #CD7F32, #B87333);
        color: white;
      }

      .trending-thumb {
        width: 120px;
        height: 120px;
        border-radius: 12px;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 4rem;
        flex-shrink: 0;
      }

      .trending-info {
        flex: 1;
      }

      .trending-info h3 {
        font-size: 1.3rem;
        margin-bottom: 0.5rem;
      }

      .trending-info .creator {
        color: var(--text-light);
        margin-bottom: 1rem;
      }

      .trending-stats {
        display: flex;
        gap: 2rem;
        font-size: 0.95rem;
        color: var(--text-light);
      }

      .category-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 2rem;
      }

      .category-card {
        padding: 3rem 2rem;
        border-radius: 16px;
        color: white;
        text-align: center;
        cursor: pointer;
        transition: all 0.3s;
        box-shadow: var(--shadow);
      }

      .category-card:hover {
        transform: translateY(-8px) scale(1.05);
        box-shadow: var(--shadow-hover);
      }

      .category-icon {
        font-size: 4rem;
        margin-bottom: 1rem;
      }

      .category-card h3 {
        font-size: 1.5rem;
        margin-bottom: 0.5rem;
      }

      .category-card p {
        opacity: 0.9;
      }

      .creators-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 2rem;
      }

      .creator-card {
        background: white;
        border-radius: 16px;
        overflow: hidden;
        box-shadow: var(--shadow);
        transition: all 0.3s;
        text-align: center;
      }

      .creator-card:hover {
        transform: translateY(-8px);
        box-shadow: var(--shadow-hover);
      }

      .creator-cover {
        height: 120px;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 4rem;
      }

      .creator-avatar {
        width: 80px;
        height: 80px;
        border-radius: 50%;
        background: white;
        border: 4px solid white;
        margin: -40px auto 1rem;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 3rem;
        box-shadow: var(--shadow);
      }

      .creator-card h3 {
        font-size: 1.3rem;
        margin-bottom: 0.5rem;
      }

      .creator-bio {
        color: var(--text-light);
        margin-bottom: 1.5rem;
        padding: 0 1rem;
      }

      .creator-stats {
        display: flex;
        justify-content: space-around;
        padding: 1.5rem 0;
        border-top: 1px solid #E0E0E0;
        border-bottom: 1px solid #E0E0E0;
        margin: 1rem 0;
      }

      .stat {
        text-align: center;
      }

      .stat strong {
        display: block;
        font-size: 1.2rem;
        color: var(--text-dark);
        margin-bottom: 0.25rem;
      }

      .stat span {
        font-size: 0.85rem;
        color: var(--text-light);
      }

      .follow-btn {
        margin: 1rem;
        padding: 0.75rem 2rem;
        background: var(--primary-color);
        color: white;
        border: none;
        border-radius: 24px;
        cursor: pointer;
        font-weight: 600;
        transition: all 0.3s;
      }

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

      .about-content {
        max-width: 900px;
        margin: 0 auto;
        text-align: center;
      }

      .about-content h1 {
        font-size: 2.5rem;
        margin-bottom: 1rem;
      }

      .about-intro {
        font-size: 1.2rem;
        color: var(--text-light);
        margin-bottom: 3rem;
        line-height: 1.8;
      }

      .features-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 2rem;
        margin-bottom: 4rem;
      }

      .feature {
        background: white;
        padding: 2rem;
        border-radius: 16px;
        box-shadow: var(--shadow);
        transition: all 0.3s;
      }

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

      .feature-icon {
        font-size: 3rem;
        margin-bottom: 1rem;
      }

      .feature h3 {
        font-size: 1.2rem;
        margin-bottom: 0.5rem;
      }

      .feature p {
        color: var(--text-light);
      }

      .stats-row {
        display: flex;
        justify-content: space-around;
        padding: 3rem 0;
      }

      .stat-item h2 {
        font-size: 3rem;
        color: var(--primary-color);
        margin-bottom: 0.5rem;
      }

      .stat-item p {
        color: var(--text-light);
        font-size: 1.1rem;
      }

      .footer {
        background: var(--text-dark);
        color: white;
        padding: 3rem 0 1rem;
        margin-top: 4rem;
      }

      .footer-content {
        max-width: 1400px;
        margin: 0 auto;
        padding: 0 2rem;
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 2rem;
        margin-bottom: 2rem;
      }

      .footer-section h4 {
        margin-bottom: 1rem;
        font-size: 1.1rem;
      }

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

      .footer-section li {
        margin-bottom: 0.5rem;
      }

      .footer-section a {
        color: rgba(255,255,255,0.7);
        text-decoration: none;
        transition: color 0.3s;
      }

      .footer-section a:hover {
        color: white;
      }

      .social-links {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
      }

      .footer-bottom {
        text-align: center;
        padding-top: 2rem;
        border-top: 1px solid rgba(255,255,255,0.1);
        color: rgba(255,255,255,0.5);
      }

      @media (max-width: 1024px) {
        .hero-section {
          grid-template-columns: 1fr;
          text-align: center;
        }

        .hero-visual {
          display: none;
        }

        .hero-actions {
          justify-content: center;
        }

        .main-nav {
          display: none;
        }

        .nav-container {
          flex-wrap: wrap;
        }

        .video-grid {
          grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        }
      }

      @media (max-width: 640px) {
        .nav-actions {
          flex-wrap: wrap;
        }

        .search-box input {
          width: 150px;
        }

        .hero-title {
          font-size: 2rem;
        }

        .hero-subtitle {
          font-size: 1rem;
        }

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

        .trending-card {
          flex-direction: column;
          text-align: center;
        }

        .category-grid {
          grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        }

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