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

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

.container {
    width: 80%;
    margin: 0 auto;
    padding: 20px;
}

.header {
    background: linear-gradient(135deg, #87CEEB 0%, #5AB8D8 100%);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.logo h1 {
    color: #fff;
    font-size: 24px;
    font-weight: bold;
}

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

.nav a {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s;
}

.nav a:hover,
.nav a.active {
    color: #FFD700;
}

.lang-select {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.lang-select:hover {
    background: rgba(255, 255, 255, 0.4);
}

.lang-select option {
    color: #333;
}

.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),
                url('./lunbotu.jpg');
    background-size: cover;
    background-position: center;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
}

.hero-content h2 {
    font-size: 48px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-content p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: linear-gradient(135deg, #87CEEB 0%, #5AB8D8 100%);
    color: #fff;
    text-decoration: none;
    border-radius: 25px;
    font-size: 16px;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(135, 206, 235, 0.4);
}

.btn-secondary {
    background: transparent;
    border: 2px solid #87CEEB;
    color: #87CEEB;
}

.btn-secondary:hover {
    background: #87CEEB;
    color: #fff;
}

.features {
    padding: 60px 0;
    background: #f0f8ff;
}

.features h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
    color: #5AB8D8;
}

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

.card {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s;
}

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

.card i {
    font-size: 48px;
    color: #5AB8D8;
    margin-bottom: 20px;
}

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

.card p {
    color: #666;
}

.products-preview {
    padding: 60px 0;
}

.products-preview h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
    color: #5AB8D8;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}

.product-item {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s;
}

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

.product-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.product-item h4 {
    padding: 15px;
    font-size: 18px;
    color: #333;
}

.product-item p {
    padding: 0 15px 20px;
    color: #666;
    font-size: 14px;
}

.products-preview .btn-secondary {
    display: block;
    width: fit-content;
    margin: 0 auto;
}

.services {
    padding: 60px 0;
    background: #f0f8ff;
}

.services h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
    color: #5AB8D8;
}

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

.service-card {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s;
}

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

.service-card i {
    font-size: 48px;
    color: #5AB8D8;
    margin-bottom: 20px;
}

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

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

.footer {
    background: #333;
    color: #fff;
    padding: 50px 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h4 {
    margin-bottom: 20px;
    color: #87CEEB;
}

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

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

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

.footer-section a:hover {
    color: #87CEEB;
}

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

.footer-section i {
    margin-right: 10px;
    color: #87CEEB;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #444;
    color: #666;
}

.page-title {
    background: linear-gradient(135deg, #87CEEB 0%, #5AB8D8 100%);
    padding: 40px 0;
    text-align: center;
    color: #fff;
}

.page-title h1 {
    font-size: 36px;
}

.about-content {
    padding: 60px 0;
}

.about-content h2 {
    color: #5AB8D8;
    margin-bottom: 20px;
    font-size: 28px;
}

.about-content p {
    margin-bottom: 20px;
    line-height: 1.8;
    color: #555;
}

.about-content img {
    max-width: 100%;
    border-radius: 10px;
    margin: 20px 0;
}

.history-timeline {
    position: relative;
    padding-left: 30px;
}

.history-timeline::before {
    content: '';
    position: absolute;
    left: 10px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #87CEEB;
}

.history-item {
    position: relative;
    margin-bottom: 30px;
    padding: 20px;
    background: #f0f8ff;
    border-radius: 10px;
}

.history-item::before {
    content: '';
    position: absolute;
    left: -24px;
    top: 25px;
    width: 12px;
    height: 12px;
    background: #5AB8D8;
    border-radius: 50%;
    border: 3px solid #fff;
    box-shadow: 0 0 0 2px #87CEEB;
}

.history-item .year {
    font-weight: bold;
    color: #5AB8D8;
    margin-bottom: 10px;
}

.products-page {
    padding: 60px 0;
}

.product-categories {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
}

.category-btn {
    padding: 10px 25px;
    border: 2px solid #5AB8D8;
    background: transparent;
    color: #5AB8D8;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s;
}

.category-btn:hover,
.category-btn.active {
    background: #5AB8D8;
    color: #fff;
}

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

.product-card {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s;
}

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

.product-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.product-card .product-info {
    padding: 20px;
}

.product-card .product-name {
    font-size: 18px;
    margin-bottom: 10px;
    color: #333;
}

.product-card .product-price {
    font-size: 20px;
    color: #5AB8D8;
    font-weight: bold;
}

.product-card .product-desc {
    color: #666;
    font-size: 14px;
    margin-top: 10px;
}

.anti-counterfeit-page {
    padding: 60px 0;
}

.anti-counterfeit-container {
    max-width: 600px;
    margin: 0 auto;
    background: #fff;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.1);
}

.anti-counterfeit-container h2 {
    text-align: center;
    color: #5AB8D8;
    margin-bottom: 30px;
}

.query-form {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.query-form input {
    flex: 1;
    padding: 15px 20px;
    border: 2px solid #ddd;
    border-radius: 10px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.query-form input:focus {
    outline: none;
    border-color: #5AB8D8;
}

.query-form input.valid {
    border-color: #28a745;
}

.query-form input.invalid {
    border-color: #dc3545;
}

.query-form button {
    padding: 15px 30px;
    background: linear-gradient(135deg, #87CEEB 0%, #5AB8D8 100%);
    color: #fff;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 16px;
    transition: transform 0.3s;
}

.query-form button:hover {
    transform: scale(1.05);
}

.code-hint {
    font-size: 14px;
    color: #666;
    margin-bottom: 20px;
    text-align: center;
}

.code-hint.valid {
    color: #28a745;
}

.code-hint.invalid {
    color: #dc3545;
}

.result {
    padding: 20px;
    border-radius: 10px;
    margin-top: 20px;
    display: none;
}

.result.success {
    background: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
    display: block;
}

.result.error {
    background: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
    display: block;
}

.result h4 {
    margin-bottom: 10px;
}

.anti-counterfeit-tips {
    margin-top: 40px;
    padding: 20px;
    background: #f0f8ff;
    border-radius: 10px;
}

.anti-counterfeit-tips h3 {
    color: #5AB8D8;
    margin-bottom: 15px;
}

.anti-counterfeit-tips ul {
    list-style: none;
    padding-left: 0;
}

.anti-counterfeit-tips li {
    padding: 8px 0;
    color: #666;
    position: relative;
    padding-left: 20px;
}

.anti-counterfeit-tips li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #5AB8D8;
}

.contact-page {
    padding: 60px 0;
}

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

.contact-info {
    background: #f0f8ff;
    padding: 40px;
    border-radius: 15px;
}

.contact-info h2 {
    color: #5AB8D8;
    margin-bottom: 30px;
}

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

.contact-info .info-item i {
    font-size: 24px;
    color: #5AB8D8;
    margin-right: 15px;
    width: 30px;
}

.contact-info .info-item h4 {
    margin-bottom: 5px;
    color: #333;
}

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

.contact-form {
    background: #fff;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.1);
}

.contact-form h2 {
    color: #5AB8D8;
    margin-bottom: 30px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 15px;
    margin-bottom: 20px;
    border: 2px solid #ddd;
    border-radius: 10px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #5AB8D8;
}

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

.contact-form button {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #87CEEB 0%, #5AB8D8 100%);
    color: #fff;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 18px;
    transition: transform 0.3s;
}

.contact-form button:hover {
    transform: scale(1.02);
}

.map-container {
    margin-top: 40px;
    height: 400px;
    background: #f0f8ff;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.map-container p {
    color: #888;
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav ul {
        gap: 15px;
    }
    
    .hero-content h2 {
        font-size: 28px;
    }
    
    .feature-cards,
    .product-grid,
    .service-cards,
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .product-list {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .query-form {
        flex-direction: column;
    }
}