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

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

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

/* Header */
.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.logo h1 {
    color: #1e40af;
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.2rem;
}

.logo i {
    margin-right: 10px;
    color: #3b82f6;
}

.tagline {
    color: #6b7280;
    font-size: 0.85rem;
    font-weight: 500;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav a:hover {
    color: #1e40af;
}

.wechat-qr {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #1e40af;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
}

.wechat-qr i {
    font-size: 1.2rem;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 50%, #60a5fa 100%);
    color: white;
    padding: 150px 0 100px;
    margin-top: 80px;
    display: flex;
    align-items: center;
    min-height: 70vh;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.6;
}

.hero-features {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    padding: 0.8rem 1.2rem;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 500;
}

.feature-item i {
    color: #fbbf24;
    font-size: 1.1rem;
}

.hero-image {
    text-align: center;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.cta-button {
    background: #fbbf24;
    color: #1e40af;
    padding: 15px 30px;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
}

.cta-button:hover {
    background: #f59e0b;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(251, 191, 36, 0.3);
}

/* Products Section */
.products {
    padding: 80px 0;
    background: #f8f9fa;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
    font-weight: 700;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.product-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.product-image {
    position: relative;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: #ef4444;
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
    z-index: 2;
}

.product-badge.new {
    background: #10b981;
}

.product-specs {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    margin-bottom: 1rem;
}

.spec-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: #374151;
}

.spec-item i {
    color: #10b981;
    font-size: 0.75rem;
}

.product-info {
    padding: 1.5rem;
}

.product-info h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: #333;
    font-weight: 600;
}

.product-description {
    color: #666;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.add-to-cart {
    width: 100%;
    background: #1e40af;
    color: white;
    border: none;
    padding: 12px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.add-to-cart:hover {
    background: #1e3a8a;
    transform: translateY(-2px);
}

.add-to-cart i {
    margin-right: 8px;
}

/* Technical Specifications Section */
.specifications {
    padding: 80px 0;
    background: white;
}

.spec-comparison {
    margin-bottom: 3rem;
}

.spec-table {
    overflow-x: auto;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.spec-table table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

.spec-table th,
.spec-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}

.spec-table th {
    background: #1e40af;
    color: white;
    font-weight: 600;
    font-size: 0.95rem;
}

.spec-table td {
    font-size: 0.9rem;
    color: #374151;
}

.spec-table tr:hover {
    background: #f8fafc;
}

.compatibility-section {
    margin-top: 3rem;
}

.compatibility-section h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: #1e40af;
    text-align: center;
}

.compatibility-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.compat-category {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.compat-category:hover {
    transform: translateY(-5px);
}

.compat-category h4 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    color: #1e40af;
    font-size: 1.2rem;
}

.compat-category h4 i {
    color: #3b82f6;
}

.compat-category ul {
    list-style: none;
}

.compat-category li {
    padding: 0.5rem 0;
    color: #6b7280;
    border-bottom: 1px solid #f3f4f6;
}

.compat-category li:last-child {
    border-bottom: none;
}

.compat-category li:before {
    content: "✓";
    color: #10b981;
    font-weight: bold;
    margin-right: 0.5rem;
}

/* Technical Support Section */
.support {
    padding: 80px 0;
    background: #f8fafc;
}

.support-content {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.faq-section h3,
.download-section h3,
.notice-section h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    color: #1e40af;
    font-size: 1.5rem;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-item {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.faq-item h4 {
    color: #1e40af;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.faq-item p {
    color: #6b7280;
    line-height: 1.6;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.download-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.download-item:hover {
    transform: translateY(-5px);
}

.download-item i {
    font-size: 2.5rem;
    color: #3b82f6;
    margin-bottom: 1rem;
}

.download-item h4 {
    margin-bottom: 0.5rem;
    color: #1e40af;
}

.download-item p {
    color: #6b7280;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.download-btn {
    display: inline-block;
    background: #1e40af;
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.download-btn:hover {
    background: #1e3a8a;
    transform: translateY(-2px);
}

.notice-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.notice-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    border-radius: 10px;
    border-left: 4px solid;
}

.notice-item.warning {
    background: #fef3cd;
    border-left-color: #f59e0b;
}

.notice-item.info {
    background: #dbeafe;
    border-left-color: #3b82f6;
}

.notice-item.success {
    background: #d1fae5;
    border-left-color: #10b981;
}

.notice-item i {
    font-size: 1.2rem;
    margin-top: 0.2rem;
}

.notice-item.warning i {
    color: #f59e0b;
}

.notice-item.info i {
    color: #3b82f6;
}

.notice-item.success i {
    color: #10b981;
}

.notice-item p {
    color: #374151;
    line-height: 1.6;
    margin: 0;
}
/* About Section */
.about {
    padding: 80px 0;
    background: white;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: #1e40af;
    font-weight: 600;
}

.about-text p {
    margin-bottom: 2rem;
    color: #6b7280;
    line-height: 1.7;
    font-size: 1.1rem;
}

.company-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.highlight-item {
    text-align: center;
    padding: 1.5rem;
    background: #f8fafc;
    border-radius: 15px;
    transition: transform 0.3s ease;
}

.highlight-item:hover {
    transform: translateY(-5px);
}

.highlight-item i {
    font-size: 2rem;
    color: #3b82f6;
    margin-bottom: 1rem;
}

.highlight-item h4 {
    color: #1e40af;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.highlight-item p {
    color: #6b7280;
    font-size: 0.9rem;
    margin: 0;
}

.about-image img {
    width: 100%;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

/* Contact Section */
.contact {
    padding: 80px 0;
    background: #f8f9fa;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.contact-item i {
    font-size: 2rem;
    color: #ff6b35;
    margin-bottom: 1rem;
}

.contact-item h3 {
    margin-bottom: 0.5rem;
    color: #333;
}

.contact-form {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.contact-form h3 {
    margin-bottom: 1.5rem;
    color: #333;
    font-weight: 600;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px;
    margin-bottom: 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-family: inherit;
}

.contact-form select {
    width: 100%;
    padding: 12px;
    margin-bottom: 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-family: inherit;
    background: white;
}

.contact-form button {
    width: 100%;
    background: #1e40af;
    color: white;
    padding: 12px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s ease;
}

.contact-form button:hover {
    background: #1e3a8a;
}

.contact-item small {
    display: block;
    color: #9ca3af;
    font-size: 0.8rem;
    margin-top: 0.3rem;
}

.qr-code {
    margin-top: 1rem;
    display: flex;
    justify-content: center;
}

.contact-qr-img {
    width: 100px;
    height: 100px;
    object-fit: contain;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
    padding: 0.5rem;
    background: #f9fafb;
}

/* Footer */
.footer {
    background: #1f2937;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: #3b82f6;
}

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

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #3b82f6;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.social-links a {
    display: inline-block;
    width: 40px;
    height: 40px;
    background: #3b82f6;
    color: white;
    text-align: center;
    line-height: 40px;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: #1e40af;
    transform: translateY(-3px);
}

.contact-info-footer {
    margin-top: 1rem;
}

.contact-info-footer p {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    color: #d1d5db;
    font-size: 0.9rem;
}

.contact-info-footer i {
    color: #3b82f6;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 1rem;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-badges {
    display: flex;
    gap: 0.5rem;
}

.badge {
    background: #3b82f6;
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
}

.modal-content {
    background-color: white;
    margin: 10% auto;
    padding: 0;
    border-radius: 15px;
    width: 80%;
    max-width: 600px;
    max-height: 70vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid #eee;
}

.modal-header h3 {
    margin: 0;
    color: #333;
}

.close {
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    color: #aaa;
}

.close:hover {
    color: #333;
}

.modal-body {
    padding: 1.5rem;
}

.cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid #eee;
}

.cart-item:last-child {
    border-bottom: none;
}

.cart-total {
    margin-top: 1rem;
    text-align: right;
    color: #ff6b35;
    font-weight: 600;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid #eee;
    display: flex;
    gap: 1rem;
}

.checkout-btn,
.clear-cart-btn {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.checkout-btn {
    background: #ff6b35;
    color: white;
}

.checkout-btn:hover {
    background: #e55a2b;
}

.clear-cart-btn {
    background: #6c757d;
    color: white;
}

.clear-cart-btn:hover {
    background: #5a6268;
}

/* Footer */
.footer {
    background: #333;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: #ff6b35;
}

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

.footer-section li {
    margin-bottom: 0.5rem;
}

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

.footer-section a:hover {
    color: #ff6b35;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    display: inline-block;
    width: 40px;
    height: 40px;
    background: #ff6b35;
    color: white;
    text-align: center;
    line-height: 40px;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: #e55a2b;
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 1rem;
    border-top: 1px solid #444;
    color: #ccc;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav ul {
        gap: 1rem;
    }

    .hero-content h2 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .product-grid {
        grid-template-columns: 1fr;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .modal-content {
        width: 95%;
        margin: 5% auto;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 120px 0 60px;
    }

    .products,
    .about,
    .contact {
        padding: 60px 0;
    }

    .modal-footer {
        flex-direction: column;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.product-card {
    animation: fadeInUp 0.6s ease-out;
}

/* Hover effects */
.product-card,
.contact-item {
    transition: all 0.3s ease;
}

.product-card:hover,
.contact-item:hover {
    transform: translateY(-5px);
}

/* Button effects */
button {
    transition: all 0.3s ease;
}

button:active {
    transform: scale(0.98);
}