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

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

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

header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

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

.logo img {
    height: 50px;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 30px;
}

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

nav ul li a:hover {
    color: #007bff;
}

.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 150px 0 100px;
    margin-top: 80px;
}

.hero-content {
    text-align: center;
}

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

.subtitle {
    font-size: 24px;
    margin-bottom: 15px;
    opacity: 0.9;
}

.description {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.8;
}

.platform-types {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 50px;
}

.platform-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 30px;
    width: 300px;
    transition: transform 0.3s;
}

.platform-card:hover {
    transform: translateY(-10px);
}

.platform-card img {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
}

.platform-card h3 {
    font-size: 24px;
    margin-bottom: 10px;
}

.platform-card p {
    font-size: 16px;
    opacity: 0.9;
}

.download-section {
    margin-top: 50px;
    display: flex;
    justify-content: center;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 15px;
    background: #fff;
    color: #667eea;
    padding: 20px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    background: #f8f9fa;
}

.download-icon {
    font-size: 32px;
}

.download-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.download-title {
    font-size: 20px;
    font-weight: 700;
    color: #333;
}

.download-subtitle {
    font-size: 14px;
    color: #666;
    font-weight: 400;
}

.features {
    padding: 80px 0;
    background: #f8f9fa;
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
}

.feature-card {
    background: #fff;
    border-radius: 15px;
    padding: 40px;
    margin-bottom: 40px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    display: flex;
    gap: 30px;
}

.feature-icon {
    flex-shrink: 0;
    width: 100px;
    height: 100px;
}

.feature-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.feature-content {
    flex: 1;
}

.feature-content h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: #007bff;
}

.feature-content > p {
    font-size: 18px;
    margin-bottom: 25px;
    color: #666;
}

.feature-detail {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.feature-detail h4 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #333;
}

.feature-detail p {
    font-size: 16px;
    color: #666;
}

.feature-detail.highlight {
    background: #e7f3ff;
    border-left: 4px solid #007bff;
}

.feature-detail ul {
    list-style: none;
    padding-left: 0;
}

.feature-detail ul li {
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
}

.feature-detail ul li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: #007bff;
    font-weight: bold;
}

.feature-conclusion {
    background: #d4edda;
    padding: 20px;
    border-radius: 10px;
    border-left: 4px solid #28a745;
}

.feature-conclusion p {
    font-size: 16px;
    color: #155724;
    margin: 0;
}

.benefits {
    padding: 80px 0;
    background: #fff;
}

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

.benefit-item {
    text-align: center;
    padding: 30px;
    border-radius: 15px;
    background: #f8f9fa;
    transition: transform 0.3s, box-shadow 0.3s;
}

.benefit-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.benefit-item img {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
}

.benefit-item h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #333;
}

.benefit-item p {
    font-size: 16px;
    color: #666;
}

.contact {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.contact-content {
    display: flex;
    gap: 50px;
    align-items: center;
}

.contact-info {
    flex: 1;
}

.contact-info h3 {
    font-size: 32px;
    margin-bottom: 15px;
}

.contact-info > p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.contact-details p {
    font-size: 16px;
    margin-bottom: 10px;
    opacity: 0.9;
}

.contact-image {
    flex-shrink: 0;
    width: 400px;
}

.contact-image img {
    width: 100%;
    border-radius: 15px;
}

footer {
    background: #333;
    color: #fff;
    padding: 30px 0;
    text-align: center;
}

footer p {
    font-size: 14px;
    opacity: 0.8;
    margin-bottom: 5px;
}

footer p.icp {
    font-size: 12px;
    opacity: 0.6;
}

footer p.icp a {
    color: #fff;
    text-decoration: none;
    transition: opacity 0.3s;
}

footer p.icp a:hover {
    opacity: 1;
    text-decoration: underline;
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 32px;
    }
    
    .subtitle {
        font-size: 20px;
    }
    
    .description {
        font-size: 16px;
    }
    
    .platform-types {
        flex-direction: column;
        gap: 20px;
    }
    
    .platform-card {
        width: 100%;
        max-width: 350px;
        margin: 0 auto;
    }
    
    .feature-card {
        flex-direction: column;
    }
    
    .feature-icon {
        width: 80px;
        height: 80px;
        margin: 0 auto;
    }
    
    .contact-content {
        flex-direction: column;
    }
    
    .contact-image {
        width: 100%;
        max-width: 400px;
    }
    
    nav ul {
        display: none;
    }
}