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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

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

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.logo h1 {
    font-size: 24px;
    margin-bottom: 5px;
}

.logo p {
    font-size: 14px;
    opacity: 0.9;
}

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

nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

nav a:hover {
    color: #ffd700;
}

.hero {
    padding: 180px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.hero-content h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 18px;
    margin-bottom: 15px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.95;
}

.download-btn {
    margin-top: 30px;
}

.btn {
    display: inline-block;
    padding: 15px 40px;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 18px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(245, 87, 108, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.btn-secondary:hover {
    box-shadow: 0 10px 30px rgba(79, 172, 254, 0.4);
}

.hero-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 60px;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.feature {
    background: rgba(255,255,255,0.1);
    padding: 30px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
}

.feature span {
    font-size: 40px;
    display: block;
    margin-bottom: 15px;
}

.feature h3 {
    font-size: 18px;
    margin-bottom: 10px;
}

.products {
    padding: 80px 0;
    background: white;
}

.products h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
    color: #333;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.product-card {
    background: #f8f9fa;
    padding: 40px;
    border-radius: 15px;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid #e9ecef;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.product-icon {
    font-size: 48px;
    display: block;
    margin-bottom: 20px;
}

.product-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: #333;
}

.product-card p {
    color: #666;
    margin-bottom: 20px;
}

.product-card ul {
    list-style: none;
    margin-bottom: 25px;
}

.product-card li {
    padding: 8px 0;
    color: #555;
    padding-left: 20px;
    position: relative;
}

.product-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #667eea;
}

.news {
    padding: 80px 0;
    background: #f5f5f5;
}

.news h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
    color: #333;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.news-card {
    background: white;
    padding: 30px;
    border-radius: 15px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
}

.news-category {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 12px;
    margin-bottom: 15px;
}

.news-card h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #333;
}

.news-card p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.8;
}

.news-date {
    color: #999;
    font-size: 14px;
}

.about {
    padding: 80px 0;
    background: white;
}

.about h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
    color: #333;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.about-text h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #333;
}

.about-text p {
    margin-bottom: 15px;
    color: #555;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.stat-item {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 14px;
    opacity: 0.9;
}

.about-values {
    margin-top: 60px;
}

.about-values h3 {
    text-align: center;
    font-size: 24px;
    margin-bottom: 40px;
    color: #333;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.value-item {
    text-align: center;
    padding: 30px;
    background: #f8f9fa;
    border-radius: 15px;
}

.value-item span {
    font-size: 40px;
    display: block;
    margin-bottom: 15px;
}

.value-item h4 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #333;
}

.value-item p {
    color: #666;
    font-size: 14px;
}

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

.contact h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.contact-item {
    display: flex;
    gap: 15px;
}

.contact-item span {
    font-size: 28px;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 16px;
    margin-bottom: 5px;
}

.contact-item p {
    opacity: 0.9;
}

.contact-form {
    background: rgba(255,255,255,0.1);
    padding: 40px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
}

.contact-form h3 {
    margin-bottom: 25px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 15px;
    margin-bottom: 15px;
    border: none;
    border-radius: 10px;
    background: rgba(255,255,255,0.2);
    color: white;
    font-size: 16px;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: rgba(255,255,255,0.7);
}

.contact-form textarea {
    resize: none;
}

.contact-form button {
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

.contact-form button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(245, 87, 108, 0.4);
}

footer {
    background: #2d3436;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}

.footer-section h4 {
    margin-bottom: 20px;
    color: #fff;
}

.footer-section p {
    opacity: 0.8;
}

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

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

.footer-section a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: #fff;
}

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

.social-links span {
    background: rgba(255,255,255,0.1);
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

.social-links span:hover {
    background: rgba(255,255,255,0.2);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    margin-bottom: 10px;
    opacity: 0.8;
}

@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: 15px;
    }
    
    nav ul {
        gap: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero-content h2 {
        font-size: 28px;
    }
    
    .hero-features {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .values-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}