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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #ff6b6b;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #ff6b6b;
}

.hero {
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 50%, #fecfef 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 4rem;
    color: #fff;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.subtitle {
    font-size: 1.5rem;
    color: #fff;
    margin-bottom: 1rem;
    font-weight: 500;
}

.description {
    font-size: 1.1rem;
    color: #fff;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
}

.btn-primary {
    background: #ff6b6b;
    color: #fff;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.6);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.9);
    color: #ff6b6b;
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: #fff;
    transform: translateY(-2px);
}

.features {
    padding: 5rem 2rem;
    background: #f8f9fa;
    text-align: center;
}

.features h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    padding: 2rem;
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

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

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #333;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

.download {
    padding: 5rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    text-align: center;
    color: #fff;
}

.download h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.download-desc {
    font-size: 1.1rem;
    margin-bottom: 3rem;
    opacity: 0.9;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    max-width: 800px;
    margin: 0 auto;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem 2rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    text-decoration: none;
    color: #fff;
    transition: all 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.download-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
}

.download-btn.coming-soon {
    opacity: 0.6;
    cursor: not-allowed;
}

.download-btn.coming-soon:hover {
    transform: none;
    background: rgba(255, 255, 255, 0.1);
}

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

.btn-text {
    text-align: left;
}

.btn-label {
    display: block;
    font-size: 1.1rem;
    font-weight: bold;
}

.btn-desc {
    display: block;
    font-size: 0.9rem;
    opacity: 0.8;
}

.contact {
    padding: 5rem 2rem;
    background: #f8f9fa;
    text-align: center;
}

.contact h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s;
    cursor: pointer;
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.contact-icon {
    font-size: 2rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
    border-radius: 50%;
    color: #fff;
}

.contact-text {
    text-align: left;
    flex: 1;
}

.contact-text h3 {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 0.3rem;
    font-weight: 500;
}

.contact-text p {
    font-size: 1.2rem;
    color: #333;
    font-weight: 600;
    margin: 0;
    transition: color 0.3s;
}

.contact-text p:hover {
    color: #ff6b6b;
}

.qq-link {
    color: #333;
    text-decoration: none;
    transition: color 0.3s;
}

.qq-link:hover {
    color: #ff6b6b;
    text-decoration: underline;
}

footer {
    background: #333;
    color: #fff;
    padding: 3rem 2rem;
    text-align: center;
}

.footer-content {
    max-width: 800px;
    margin: 0 auto;
}

.footer-logo {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    color: #ff6b6b;
}

.footer-desc {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    opacity: 0.8;
}

.copyright {
    font-size: 0.9rem;
    opacity: 0.6;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .subtitle {
        font-size: 1.2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 200px;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .download-btn {
        width: 280px;
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .download-btn {
        width: 100%;
        max-width: 250px;
    }
}