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

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

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

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px 0;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo {
    font-size: 28px;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 10px;
}

nav {
    margin-top: 15px;
}

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

nav a {
    color: white;
    text-decoration: none;
    font-size: 18px;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 5px 10px;
    border-radius: 5px;
}

nav a:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

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

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

.hero p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.95;
}

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

.btn {
    display: inline-block;
    padding: 15px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    font-size: 18px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: #fff;
    color: #667eea;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #667eea;
}

section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #333;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    margin: 15px auto 0;
    border-radius: 2px;
}

.features {
    background: white;
}

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

.feature-card {
    background: #f8f9fa;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

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

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

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

.products {
    background: #f5f7fa;
}

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

.product-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.product-image {
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
}

.product-content {
    padding: 25px;
}

.product-content h3 {
    font-size: 22px;
    margin-bottom: 10px;
    color: #333;
}

.product-content p {
    color: #666;
    margin-bottom: 15px;
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.product-tag {
    background: #e9ecef;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 14px;
    color: #667eea;
}

.news {
    background: white;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.news-card {
    background: #f8f9fa;
    border-radius: 15px;
    padding: 25px;
    border-left: 4px solid #667eea;
    transition: all 0.3s ease;
}

.news-card:hover {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.news-date {
    color: #999;
    font-size: 14px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.news-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: #333;
    line-height: 1.4;
}

.news-card p {
    color: #666;
    line-height: 1.6;
}

.news-card a {
    color: #667eea;
    text-decoration: none;
    font-weight: bold;
    display: inline-block;
    margin-top: 15px;
}

.news-card a:hover {
    text-decoration: underline;
}

.about {
    background: linear-gradient(135deg, #f5f7fa 0%, #e9ecef 100%);
}

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

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

.about-text p {
    margin-bottom: 20px;
    color: #555;
    font-size: 16px;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.stat-number {
    font-size: 36px;
    font-weight: bold;
    color: #667eea;
}

.stat-label {
    color: #666;
    margin-top: 5px;
}

.contact {
    background: white;
}

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

.contact-info h3 {
    font-size: 28px;
    margin-bottom: 25px;
    color: #333;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 25px;
}

.contact-icon {
    font-size: 28px;
    margin-top: 3px;
}

.contact-text h4 {
    font-size: 18px;
    margin-bottom: 5px;
    color: #333;
}

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

.contact-form {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

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

footer {
    background: #1a1a2e;
    color: white;
    padding: 50px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

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

.footer-section p,
.footer-section a {
    color: #aaa;
    text-decoration: none;
    margin-bottom: 10px;
    display: block;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #333;
    color: #888;
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 32px;
    }

    .about-content,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    nav ul {
        justify-content: center;
    }

    .section-title {
        font-size: 28px;
    }
}