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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f8f9fa;
}

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

/* Navigation */
.navbar {
    background: white;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: box-shadow 0.3s;
}

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

.nav-brand h1 {
    font-size: 1.5rem;
    color: #2563eb;
    margin-bottom: 0.25rem;
}

.nav-brand p {
    font-size: 0.875rem;
    color: #666;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

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

.nav-links a:hover {
    color: #2563eb;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 3rem;
    opacity: 0.95;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.stat h3 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.stat p {
    font-size: 1rem;
    opacity: 0.9;
}

/* Filter Section */
.filter-section {
    background: white;
    padding: 2rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.filter-section h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #333;
}

.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid #e5e7eb;
    background: white;
    color: #666;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s;
}

.filter-btn:hover {
    border-color: #2563eb;
    color: #2563eb;
}

.filter-btn.active {
    background: #2563eb;
    color: white;
    border-color: #2563eb;
}

/* Products Section */
.products-section {
    padding: 3rem 0;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

.product-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

.product-image {
    position: relative;
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(37, 99, 235, 0.9);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.product-info {
    padding: 1.5rem;
}

.product-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 0.25rem;
}

.product-name-zh {
    font-size: 0.875rem;
    color: #666;
    margin-bottom: 0.75rem;
}

.product-description {
    font-size: 0.875rem;
    color: #666;
    line-height: 1.5;
    margin-bottom: 1rem;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.feature-tag {
    background: #f3f4f6;
    color: #666;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid #e5e7eb;
}

.product-pricing {
    display: flex;
    flex-direction: column;
}

.product-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: #2563eb;
}

.product-moq {
    font-size: 0.75rem;
    color: #666;
}

.inquiry-btn {
    background: #2563eb;
    color: white;
    border: none;
    padding: 0.625rem 1.25rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: background 0.3s;
}

.inquiry-btn:hover {
    background: #1d4ed8;
}

.loading, .error, .no-products {
    text-align: center;
    padding: 3rem;
    color: #666;
    grid-column: 1 / -1;
}

/* About Section */
.about-section {
    background: white;
    padding: 4rem 0;
}

.about-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: #333;
}

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

.about-text h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: #666;
}

.about-text ul {
    list-style: none;
}

.about-text li {
    padding: 0.5rem 0;
    color: #666;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.feature-card {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
}

.feature-card h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.feature-card p {
    font-size: 0.875rem;
    color: #666;
}

/* Contact Section */
.contact-section {
    padding: 4rem 0;
    background: #f8f9fa;
}

.contact-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #333;
}

.section-subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 3rem;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto 3rem;
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    font-family: inherit;
    font-size: 1rem;
}

.contact-form textarea {
    margin-bottom: 1rem;
    resize: vertical;
}

.submit-btn {
    width: 100%;
    background: #2563eb;
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.submit-btn:hover {
    background: #1d4ed8;
}

.contact-info {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.info-item {
    text-align: center;
    color: #666;
}

.info-item a {
    color: #2563eb;
    text-decoration: none;
}

/* Footer */
.footer {
    background: #1f2937;
    color: white;
    padding: 2rem 0;
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .category-filters {
        gap: 0.5rem;
    }
    
    .filter-btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}