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

:root {
    --primary-color: #003366;
    --primary-light: #004080;
    --secondary-color: #00CCCC;
    --accent-color: #6666FF;
    --bg-gradient-start: #001a33;
    --bg-gradient-end: #003366;
    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
    color: var(--text-primary);
}

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

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 51, 102, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--card-border);
}

.navbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--secondary-color);
}

.nav-links a.active {
    color: var(--secondary-color);
    font-weight: 600;
}

.download-btn {
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    color: var(--primary-color);
    padding: 10px 25px;
    border-radius: 25px;
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 204, 204, 0.3);
}

.hamburger {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 20px;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(0, 204, 204, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(102, 102, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(0, 204, 204, 0.05) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(10px, -10px) rotate(1deg); }
}

.hero-content {
    text-align: center;
    z-index: 1;
    max-width: 800px;
}

.hero-title {
    font-family: 'ZCOOL KuaiLe', 'Noto Sans SC', sans-serif;
    font-size: 56px;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--secondary-color) 50%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s ease-out;
}

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

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.btn-primary {
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    color: var(--primary-color);
    padding: 15px 40px;
    border-radius: 30px;
    font-size: 18px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 204, 204, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    padding: 15px 40px;
    border-radius: 30px;
    font-size: 18px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid var(--secondary-color);
    cursor: pointer;
}

.btn-secondary:hover {
    background: rgba(0, 204, 204, 0.1);
    transform: translateY(-3px);
}

.stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 80px;
    animation: fadeInUp 1s ease-out 0.6s both;
}

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

.stat-number {
    font-size: 48px;
    font-weight: 800;
    color: var(--secondary-color);
}

.stat-label {
    font-size: 16px;
    color: var(--text-secondary);
    margin-top: 5px;
}

/* Features Section */
.features {
    padding: 100px 20px;
    background: rgba(0, 0, 0, 0.2);
}

.section-title {
    text-align: center;
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 10px;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 40px 30px;
    transition: all 0.3s ease;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--secondary-color);
    box-shadow: 0 20px 40px rgba(0, 204, 204, 0.15);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, rgba(0, 204, 204, 0.2), rgba(102, 102, 255, 0.2));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 36px;
}

.feature-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 15px;
}

.feature-description {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Testimonials Section */
.testimonials {
    padding: 100px 20px;
}

.testimonials-container {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.testimonial-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 50px 40px;
    text-align: center;
    transition: all 0.3s ease;
}

.testimonial-card:hover {
    border-color: var(--secondary-color);
}

.testimonial-content {
    font-size: 20px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 30px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

.author-avatar {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.author-info {
    text-align: left;
}

.author-name {
    font-size: 18px;
    font-weight: 600;
}

.author-location {
    font-size: 14px;
    color: var(--text-secondary);
}

.testimonial-nav {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 40px;
}

.nav-btn {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--card-border);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-btn.active {
    background: var(--secondary-color);
    width: 30px;
    border-radius: 6px;
}

.nav-btn:hover {
    background: rgba(0, 204, 204, 0.5);
}

/* Download Section */
.download {
    padding: 100px 20px;
    background: rgba(0, 0, 0, 0.2);
}

.download-container {
    text-align: center;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
    margin-top: 40px;
}

.platform-btn {
    display: flex;
    align-items: center;
    gap: 15px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 15px;
    padding: 20px 40px;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.platform-btn:hover {
    background: rgba(0, 204, 204, 0.1);
    border-color: var(--secondary-color);
    transform: translateY(-3px);
}

.platform-icon {
    font-size: 40px;
}

.platform-info {
    text-align: left;
}

.platform-name {
    font-size: 18px;
    font-weight: 600;
}

.platform-tagline {
    font-size: 14px;
    color: var(--text-secondary);
}

.qr-code {
    margin-top: 60px;
}

.qr-code img {
    width: 200px;
    height: 200px;
    border-radius: 20px;
    border: 2px solid var(--card-border);
}

/* Footer */
.footer {
    padding: 60px 20px 30px;
    border-top: 1px solid var(--card-border);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--secondary-color);
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--card-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--secondary-color);
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--card-border);
    color: var(--text-secondary);
    font-size: 14px;
}

/* Features Page */
.features-page {
    padding: 120px 20px 100px;
}

.features-hero {
    text-align: center;
    margin-bottom: 80px;
}

.features-hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-detail {
    display: flex;
    align-items: center;
    gap: 40px;
    margin-bottom: 60px;
    padding: 40px;
    background: var(--card-bg);
    border-radius: 20px;
}

.feature-detail:nth-child(even) {
    flex-direction: row-reverse;
}

.feature-detail-icon {
    font-size: 64px;
    min-width: 100px;
    text-align: center;
}

.feature-detail-content h2 {
    font-size: 32px;
    margin-bottom: 15px;
}

.feature-detail-content p {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* About Page */
.about-page {
    padding: 120px 20px 100px;
}

.about-hero {
    text-align: center;
    margin-bottom: 80px;
}

.about-hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.team-section {
    margin-bottom: 80px;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.team-member {
    text-align: center;
    padding: 30px;
    background: var(--card-bg);
    border-radius: 20px;
}

.team-avatar {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    margin: 0 auto 20px;
}

.team-member h3 {
    font-size: 22px;
    margin-bottom: 5px;
}

.team-member p {
    color: var(--text-secondary);
}

.contact-section {
    text-align: center;
    padding: 60px;
    background: var(--card-bg);
    border-radius: 20px;
}

.contact-section h2 {
    font-size: 32px;
    margin-bottom: 30px;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

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

.contact-item i {
    font-size: 36px;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

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

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(0, 51, 102, 0.98);
        padding: 20px;
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .hamburger {
        display: block;
    }
    
    .download-btn {
        display: none;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .stats {
        gap: 30px;
    }
    
    .stat-number {
        font-size: 32px;
    }
    
    .feature-detail,
    .feature-detail:nth-child(even) {
        flex-direction: column;
        text-align: center;
    }
    
    .contact-info {
        gap: 30px;
    }
}