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

body {
    font-family: "Microsoft YaHei", "PingFang SC", 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;
}

header {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-size: 28px;
    font-weight: bold;
    color: #667eea;
    text-decoration: none;
}

.logo span {
    color: #764ba2;
}

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

.nav-links a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
    padding: 8px 16px;
    border-radius: 6px;
}

.nav-links a:hover, .nav-links a.active {
    color: #667eea;
    background: rgba(102, 126, 234, 0.1);
}

.hero {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.9) 100%);
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    color: #333;
}

.hero p {
    font-size: 20px;
    color: #666;
    max-width: 800px;
    margin: 0 auto 40px;
}

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

.btn {
    padding: 15px 40px;
    border: none;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: white;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.5);
}

section {
    padding: 80px 0;
    background: white;
}

section:nth-child(even) {
    background: #f8f9fa;
}

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

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: transform 0.3s;
}

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

.feature-icon {
    font-size: 60px;
    margin-bottom: 20px;
}

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

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

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

.product-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s;
}

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

.product-image {
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    color: white;
}

.product-content {
    padding: 30px;
}

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

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

.news-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
}

.news-item {
    background: white;
    padding: 25px;
    border-radius: 12px;
    border-left: 4px solid #667eea;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s;
}

.news-item:hover {
    transform: translateX(10px);
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.1);
}

.news-title {
    font-size: 18px;
    color: #333;
    margin-bottom: 10px;
    line-height: 1.4;
}

.news-desc {
    color: #666;
    font-size: 14px;
    margin-bottom: 15px;
}

.news-meta {
    font-size: 13px;
    color: #999;
    display: flex;
    justify-content: space-between;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: #333;
}

.about-text p {
    color: #666;
    margin-bottom: 20px;
    font-size: 16px;
}

.about-image {
    font-size: 200px;
    text-align: center;
}

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

.contact-item {
    background: white;
    padding: 40px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.contact-icon {
    font-size: 50px;
    margin-bottom: 20px;
}

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

.contact-item p {
    color: #666;
}

footer {
    background: #2d3748;
    color: white;
    padding: 60px 0 30px;
}

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

.footer-section h4 {
    font-size: 20px;
    margin-bottom: 20px;
    color: white;
}

.footer-section p {
    color: #a0aec0;
    margin-bottom: 10px;
}

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

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

.footer-links a {
    color: #a0aec0;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #667eea;
}

.footer-bottom {
    border-top: 1px solid #4a5568;
    padding-top: 30px;
    text-align: center;
    color: #a0aec0;
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 32px;
    }
    
    .nav-links {
        gap: 15px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        font-size: 150px;
    }
}