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

body {
    font-family: 'Arial', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

.txv-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.txv-header-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, rgba(255,255,255,0.1), transparent);
}

.txv-nav {
    position: relative;
    z-index: 10;
}

.txv-nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.txv-logo h1 a {
    font-size: 2.2rem;
    font-weight: 800;
    color: white;
    text-decoration: none;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
    transition: all 0.3s;
}

.txv-logo h1 a:hover {
    transform: scale(1.05);
    text-shadow: 3px 3px 6px rgba(0,0,0,0.3);
}

.txv-nav-menu {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.txv-nav-menu a {
    text-decoration: none;
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s;
    position: relative;
    padding: 0.5rem 0;
}

.txv-nav-menu a:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: white;
    transition: width 0.3s;
}

.txv-nav-menu a:hover:after {
    width: 100%;
}

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

.txv-btn-search, .txv-btn-login {
    padding: 0.8rem 2rem;
    border: 2px solid white;
    background: transparent;
    color: white;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.txv-btn-search:hover, .txv-btn-login:hover {
    background: white;
    color: #667eea;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255,255,255,0.3);
}

.txv-hero {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.txv-hero-background {
    position: absolute;
    inset: 0;
}

.txv-gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
    animation: float 20s infinite;
}

.txv-orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #fff, transparent);
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.txv-orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #ffd, transparent);
    top: 50%;
    right: 10%;
    animation-delay: 5s;
}

.txv-orb-3 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, #ddf, transparent);
    bottom: 10%;
    left: 50%;
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

.txv-hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    color: white;
    max-width: 1200px;
    padding: 3rem;
    animation: fadeInUp 1s ease;
}

.txv-hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    text-shadow: 3px 3px 6px rgba(0,0,0,0.3);
    line-height: 1.2;
}

.txv-hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 3rem;
    opacity: 0.95;
    font-weight: 300;
}

.txv-hero-buttons {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin-bottom: 4rem;
}

.txv-btn-primary, .txv-btn-secondary {
    padding: 1.2rem 3rem;
    border-radius: 30px;
    font-size: 1.2rem;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s;
    display: inline-block;
}

.txv-btn-primary {
    background: white;
    color: #667eea;
    box-shadow: 0 8px 25px rgba(255,255,255,0.3);
}

.txv-btn-primary:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 12px 35px rgba(255,255,255,0.4);
}

.txv-btn-secondary {
    border: 3px solid white;
    color: white;
    background: transparent;
}

.txv-btn-secondary:hover {
    background: white;
    color: #667eea;
    transform: translateY(-5px);
}

.txv-hero-stats {
    display: flex;
    gap: 4rem;
    justify-content: center;
    flex-wrap: wrap;
}

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

.txv-stat-number {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.txv-stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

.txv-featured-section, .txv-platform-features, .txv-user-reviews, .txv-platform-data {
    padding: 5rem 3rem;
}

.txv-featured-section {
    background: linear-gradient(to bottom, #f8f9fa, white);
}

.txv-container {
    max-width: 1400px;
    margin: 0 auto;
}

.txv-section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.txv-section-header h2 {
    font-size: 3rem;
    color: #333;
    margin-bottom: 1rem;
    font-weight: 800;
}

.txv-section-header p {
    font-size: 1.2rem;
    color: #666;
}

.txv-keyword-link a {
    color: #667eea;
    text-decoration: none;
    font-weight: 800;
}

.txv-video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.txv-video-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s;
    animation: fadeInUp 0.6s ease;
}

.txv-video-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 20px 50px rgba(102, 126, 234, 0.3);
}

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

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

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

.txv-play-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

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

.txv-play-icon {
    width: 80px;
    height: 80px;
    background: rgba(255,255,255,0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: #667eea;
}

.txv-video-duration {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    background: rgba(0,0,0,0.8);
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: 5px;
    font-size: 0.9rem;
}

.txv-video-info {
    padding: 1.5rem;
}

.txv-video-info h3 {
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
    color: #333;
}

.txv-video-meta {
    display: flex;
    gap: 1.5rem;
    color: #666;
    font-size: 0.9rem;
}

.txv-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.txv-feature-card {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    transition: all 0.3s;
    text-align: center;
}

.txv-feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.2);
}

.txv-feature-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.txv-feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.txv-feature-card p {
    color: #666;
    line-height: 1.8;
}

.txv-reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.txv-review-card {
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s;
}

.txv-review-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.2);
}

.txv-review-header {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
}

.txv-reviewer-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    overflow: hidden;
    margin-right: 1rem;
}

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

.txv-reviewer-info h4 {
    font-size: 1.2rem;
    margin-bottom: 0.3rem;
}

.txv-rating {
    color: #ffd700;
    font-size: 1.1rem;
}

.txv-review-content {
    color: #555;
    line-height: 1.8;
    margin-bottom: 1rem;
}

.txv-review-date {
    color: #999;
    font-size: 0.9rem;
}

.txv-data-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
}

.txv-data-card {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 3rem 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
    transition: all 0.3s;
}

.txv-data-card:hover {
    transform: translateY(-10px) scale(1.05);
    box-shadow: 0 20px 50px rgba(102, 126, 234, 0.4);
}

.txv-data-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
}

.txv-data-number {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 0.8rem;
}

.txv-data-label {
    font-size: 1.2rem;
    opacity: 0.95;
}

.txv-footer {
    background: linear-gradient(135deg, #2c3e50, #34495e);
    color: white;
    padding: 4rem 3rem 2rem;
}

.txv-footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.txv-footer-section h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.txv-footer-section p, .txv-footer-section li {
    color: rgba(255,255,255,0.8);
    line-height: 1.8;
}

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

.txv-footer-section a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color 0.3s;
}

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

.txv-footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.7);
}

.txv-back-to-top {
    position: fixed;
    bottom: 3rem;
    right: 3rem;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    font-size: 1.8rem;
    cursor: pointer;
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
    transition: all 0.3s;
    z-index: 999;
    display: none;
}

.txv-back-to-top:hover {
    transform: scale(1.15) translateY(-5px);
    box-shadow: 0 12px 30px rgba(102, 126, 234, 0.5);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .txv-nav-container {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .txv-nav-menu {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .txv-hero-title {
        font-size: 2.5rem;
    }
    
    .txv-hero-buttons {
        flex-direction: column;
        gap: 1rem;
    }
    
    .txv-video-grid, .txv-features-grid, .txv-reviews-grid, .txv-data-grid {
        grid-template-columns: 1fr;
    }
}