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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 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%);
    padding: 15px 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 {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    color: #fff;
}

.logo-icon {
    margin-right: 10px;
    font-size: 28px;
}

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

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

.nav a {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    padding: 8px 15px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.nav a:hover,
.nav a.active {
    background: rgba(255,255,255,0.2);
}

.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 150px 0 120px;
    text-align: center;
    color: #fff;
}

.hero-content h1 {
    font-size: 42px;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-content p {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-features {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 50px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    padding: 10px 20px;
    background: rgba(255,255,255,0.15);
    border-radius: 30px;
}

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

.cta-btn {
    display: inline-block;
    padding: 15px 40px;
    background: #fff;
    color: #667eea;
    text-decoration: none;
    font-size: 18px;
    font-weight: 600;
    border-radius: 30px;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(0,0,0,0.2);
}

.cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.25);
}

.product,
.news,
.about,
.contact {
    padding: 80px 0;
}

.product {
    background: #fff;
}

section h2 {
    font-size: 32px;
    text-align: center;
    margin-bottom: 15px;
    color: #333;
}

.section-desc {
    text-align: center;
    color: #666;
    margin-bottom: 50px;
    font-size: 16px;
}

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

.product-card {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
    border-color: #667eea;
}

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

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

.product-card p {
    color: #666;
    margin-bottom: 20px;
    font-size: 14px;
}

.product-features {
    list-style: none;
    margin-bottom: 20px;
}

.product-features li {
    padding: 8px 0;
    font-size: 14px;
    color: #555;
}

.product-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.product-link:hover {
    color: #764ba2;
}

.news {
    background: #f5f5f5;
}

.news-list {
    max-width: 800px;
    margin: 0 auto;
}

.news-item {
    background: #fff;
    padding: 30px;
    margin-bottom: 20px;
    border-radius: 15px;
    border-left: 4px solid #667eea;
    transition: all 0.3s ease;
}

.news-item:hover {
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.news-meta {
    display: flex;
    gap: 20px;
    margin-bottom: 15px;
    font-size: 14px;
    color: #999;
}

.news-tag {
    background: #667eea;
    color: #fff;
    padding: 3px 12px;
    border-radius: 15px;
    font-size: 12px;
}

.news-item h3 {
    font-size: 20px;
    margin-bottom: 15px;
}

.news-item h3 a {
    color: #333;
    text-decoration: none;
    transition: color 0.3s ease;
}

.news-item h3 a:hover {
    color: #667eea;
}

.news-item p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 15px;
}

.news-read {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
}

.news-read:hover {
    text-decoration: underline;
}

.about {
    background: #fff;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

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

.about-text p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 25px;
}

.values-list {
    list-style: none;
}

.values-list li {
    padding: 12px 0;
    font-size: 16px;
    color: #555;
}

.value-icon {
    margin-right: 10px;
    font-size: 18px;
}

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

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

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

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

.contact {
    background: #f5f5f5;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: #fff;
    border-radius: 15px;
}

.contact-icon {
    font-size: 28px;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    color: #fff;
}

.contact-label {
    display: block;
    font-size: 14px;
    color: #999;
    margin-bottom: 5px;
}

.contact-value {
    font-size: 16px;
    color: #333;
    font-weight: 500;
}

.contact-form {
    background: #fff;
    padding: 40px;
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-input,
.form-textarea {
    padding: 15px;
    border: 1px solid #e9ecef;
    border-radius: 10px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: #667eea;
}

.form-textarea {
    height: 150px;
    resize: none;
}

.form-submit {
    padding: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.form-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102,126,234,0.4);
}

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    margin-bottom: 20px;
    font-size: 16px;
}

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

.footer-section li {
    margin-bottom: 12px;
}

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

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

.footer-section p {
    color: #a0aec0;
    font-size: 14px;
    line-height: 1.8;
}

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

.social-icon {
    font-size: 28px;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.social-icon:hover {
    transform: scale(1.2);
}

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

.footer-bottom p {
    color: #a0aec0;
    font-size: 14px;
    margin-bottom: 10px;
}

@media (max-width: 768px) {
    .nav li {
        margin-left: 15px;
    }
    
    .nav a {
        font-size: 14px;
        padding: 5px 10px;
    }
    
    .hero-content h1 {
        font-size: 28px;
    }
    
    .hero-features {
        gap: 15px;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
}