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

/* Global Styles */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}


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

/* Hidden Class */
.hidden {
    display: none !important;
}

/* WeChat Browser Tip */
.wechat-tip {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    padding: 20px;
}

.tip-content {
    background: white;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    max-width: 400px;
    animation: slideUp 0.3s ease-out;
}

.tip-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.tip-content h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 20px;
}

.tip-content p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.5;
}

.close-btn {
    background: #007AFF;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.close-btn:hover {
    background: #0056CC;
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Hero Section Styles */
.hero {
    text-align: center;
    padding: 60px 0;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    margin: 20px 0;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

.app-icon {
    margin-bottom: 20px;
}

.icon-img {
    width: 120px;
    height: 120px;
    border-radius: 25px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
    background: white;
    padding: 10px;
}

.app-name {
    font-size: 48px;
    font-weight: 700;
    color: white;
    margin-bottom: 10px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.app-subtitle {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 15px;
    font-weight: 300;
}

.app-description {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.8);
    max-width: 880px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Download Section */
.download-section {
    text-align: center;
    padding: 50px 0;
    background: white;
    border-radius: 20px;
    margin: 20px 0;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.download-section h2 {
    font-size: 32px;
    margin-bottom: 30px;
    color: #333;
}

.download-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.download-btn {
    display: flex;
    align-items: center;
    padding: 15px 25px;
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 15px;
    text-decoration: none;
    color: #333;
    transition: all 0.3s ease;
    min-width: 200px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.ios-btn:hover {
    border-color: #007AFF;
    background: linear-gradient(135deg, #007AFF, #0056CC);
    color: white;
}

.android-btn:hover {
    border-color: #34C759;
    background: linear-gradient(135deg, #34C759, #28A745);
    color: white;
}

.btn-icon {
    font-size: 32px;
    margin-right: 15px;
    height: 100px;
    width: 100px;
}

.btn-icon img{
    width: 100%;
    height: 100%;
}

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

.btn-title {
    display: block;
    font-size: 18px;
    font-weight: 600;
}

.btn-subtitle {
    display: block;
    font-size: 14px;
    opacity: 0.7;
}

/* Preview Section */
.preview-section {
    padding: 50px 0;
    background: white;
    border-radius: 20px;
    margin: 20px 0;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.preview-section h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
    color: #333;
}

.preview-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    padding: 0 20px;
}

.preview-item {
    text-align: center;
    animation: fadeInUp 0.8s ease-out;
}

.preview-img {
    width: 100%;
    max-width: 240px;
    height: auto;
    border-radius: 15px;
    /*box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);*/
    margin-bottom: 15px;
    transition: transform 0.3s ease;
    background: #f8f9fa;
    /*padding: 20px;*/
}

.preview-img:hover {
    transform: scale(1.05);
}

.preview-caption {
    font-size: 16px;
    color: #666;
    font-weight: 500;
}

/* Features Section */
.features-section {
    padding: 50px 0;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    margin: 20px 0;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.features-section h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
    color: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    padding: 0 20px;
}

.feature-item {
    text-align: center;
    padding: 30px 20px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.3s ease;
}

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

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

.feature-item h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: white;
}

.feature-item p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

/* Contact Section */
.contact-section {
    padding: 50px 0;
    background: white;
    border-radius: 20px;
    margin: 20px 0;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.contact-section h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
    color: #333;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    padding: 25px;
    background: #f8f9fa;
    border-radius: 15px;
    transition: transform 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.contact-icon {
    font-size: 36px;
    margin-right: 20px;
}

.contact-details h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: #333;
}

.contact-details p {
    font-size: 16px;
}

.contact-details a {
    color: #007AFF;
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-details a:hover {
    color: #0056CC;
}

/* Footer */
.footer {
    text-align: center;
    padding: 30px 0;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

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

/* Mobile Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 40px 0;
        margin: 10px 0;
    }
    
    .app-name {
        font-size: 36px;
    }
    
    .app-subtitle {
        font-size: 18px;
    }
    
    .icon-img {
        width: 100px;
        height: 100px;
    }
    
    .download-section,
    .preview-section,
    .features-section,
    .contact-section {
        padding: 30px 0;
        margin: 10px 0;
    }
    
    .download-section h2,
    .preview-section h2,
    .features-section h2,
    .contact-section h2 {
        font-size: 24px;
        margin-bottom: 25px;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .download-btn {
        width: 100%;
        max-width: 300px;
    }
    
    .preview-gallery {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 20px;
        padding: 0 10px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 0 10px;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 0 10px;
    }
    
    .contact-item {
        flex-direction: column;
        text-align: center;
    }
    
    .contact-icon {
        margin-right: 0;
        margin-bottom: 15px;
    }
    
    .tip-content {
        margin: 20px;
        padding: 25px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 30px 0;
    }
    
    .app-name {
        font-size: 28px;
    }
    
    .app-subtitle {
        font-size: 16px;
    }
    
    .icon-img {
        width: 80px;
        height: 80px;
    }
    
    .download-section h2,
    .preview-section h2,
    .features-section h2,
    .contact-section h2 {
        font-size: 20px;
    }
    
    .btn-title {
        font-size: 16px;
    }
    
    .btn-subtitle {
        font-size: 12px;
    }
}