/* ========================================
   ChinaPatchFactory - Custom Patches Website
   SEO-Friendly Responsive Styles
   ======================================== */

/* CSS Variables */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #f59e0b;
    --accent-color: #10b981;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --text-muted: #9ca3af;
    --bg-white: #ffffff;
    --bg-light: #f9fafb;
    --bg-gray: #f3f4f6;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --transition: all 0.3s ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: white;
    color: var(--text-dark);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
}

.btn-white {
    background-color: white;
    color: var(--primary-color);
}

.btn-white:hover {
    background-color: var(--bg-gray);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-full {
    width: 100%;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-light);
}

/* ========================================
   Top Bar
   ======================================== */
.top-bar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 0.5rem 0;
    font-size: 0.875rem;
}

.top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.top-features {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.top-features span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.top-features i {
    color: var(--secondary-color);
}

.top-contact a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: white;
}

.top-contact a:hover {
    color: var(--secondary-color);
}

/* ========================================
   Header
   ======================================== */
.header {
    background-color: white;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
}

.logo-icon {
    font-size: 1.75rem;
}

.logo-text {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.main-nav a {
    font-weight: 500;
    color: var(--text-dark);
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.main-nav a:hover::after {
    width: 100%;
}

.main-nav a:hover {
    color: var(--primary-color);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-dark);
    transition: var(--transition);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--bg-light) 0%, white 100%);
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.hero-text .highlight {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.7;
}

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

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.feature-item i {
    color: var(--accent-color);
    font-size: 1.25rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.trust-badges {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-light);
}

.badge i {
    color: var(--secondary-color);
}

.hero-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-image-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
}

.hero-image img {
    width: 100%;
    height: auto;
    max-height: 500px;
    object-fit: cover;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.floating-badge {
    position: absolute;
    background: white;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.price-badge {
    bottom: -20px;
    left: -20px;
    text-align: center;
}

.price-badge .from {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.price-badge .price {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1;
}

.price-badge .unit {
    display: block;
    font-size: 0.875rem;
    color: var(--text-light);
}

/* ========================================
   AI Banner
   ======================================== */
.ai-banner {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 2rem 0;
    color: white;
}

.ai-banner-content {
    display: flex;
    align-items: center;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.ai-icon {
    font-size: 3rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.ai-text h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.ai-text p {
    opacity: 0.9;
    max-width: 500px;
}

/* ========================================
   Products Section
   ======================================== */
.products {
    padding: 5rem 0;
    background-color: white;
}

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

.product-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.product-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    z-index: 1;
}

.product-badge.new {
    background-color: var(--accent-color);
    color: white;
}

.product-badge.hot {
    background-color: #ef4444;
    color: white;
}

.product-image {
    height: 200px;
    overflow: hidden;
}

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

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-info {
    padding: 1.5rem;
}

.product-info h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.product-info p {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.product-price {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
    margin-bottom: 1rem;
}

.price-label {
    font-size: 0.875rem;
    color: var(--text-light);
}

.price-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

.price-unit {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ========================================
   Size Guide Section
   ======================================== */
.size-guide {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

.size-guide-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.tab-btn {
    padding: 0.75rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    background-color: white;
    color: var(--text-dark);
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.tab-btn.active,
.tab-btn:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

.size-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.size-card {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.size-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.size-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.size-card h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.size-range {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* ========================================
   Backing Options Section
   ======================================== */
.backing-options {
    padding: 5rem 0;
    background-color: white;
}

.backing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.backing-card {
    background: white;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: var(--transition);
}

.backing-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.backing-card.popular {
    border-color: var(--secondary-color);
    position: relative;
}

.backing-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.backing-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
}

.popular-tag {
    background-color: var(--secondary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.backing-features {
    margin-bottom: 1.5rem;
}

.backing-features li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    color: var(--text-light);
}

.backing-features i {
    color: var(--accent-color);
}

.backing-method {
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-light);
}

/* ========================================
   Why Us Section
   ======================================== */
.why-us {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

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

.why-us-card {
    background: white;
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.why-us-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.why-us-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.why-us-icon i {
    font-size: 2rem;
    color: white;
}

.why-us-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.why-us-card ul {
    text-align: left;
}

.why-us-card li {
    padding: 0.5rem 0;
    color: var(--text-light);
    position: relative;
    padding-left: 1.25rem;
}

.why-us-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: 700;
}

/* ========================================
   Process Section
   ======================================== */
.process {
    padding: 5rem 0;
    background-color: white;
}

.process-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.process-step {
    text-align: center;
    max-width: 280px;
    position: relative;
}

.step-number {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 30px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
}

.step-icon {
    width: 100px;
    height: 100px;
    background-color: var(--bg-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.step-icon i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.process-step h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.process-step p {
    color: var(--text-light);
}

.process-arrow {
    font-size: 2rem;
    color: var(--primary-color);
    opacity: 0.5;
}

/* ========================================
   Testimonials Section
   ======================================== */
.testimonials {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

.rating-summary {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.stars {
    display: flex;
    gap: 0.25rem;
    color: var(--secondary-color);
}

.rating-text {
    font-weight: 600;
    color: var(--text-dark);
}

.review-count {
    color: var(--text-light);
    font-size: 0.875rem;
}

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

.testimonial-card {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.testimonial-rating {
    display: flex;
    gap: 0.25rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.testimonial-text {
    color: var(--text-dark);
    font-style: italic;
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.testimonial-author {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.testimonial-author .name {
    font-weight: 600;
    color: var(--text-dark);
}

.testimonial-author .date {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ========================================
   FAQ Section
   ======================================== */
.faq {
    padding: 5rem 0;
    background-color: white;
}

.faq-grid {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border-color);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
    font-size: 1.125rem;
    font-weight: 600;
    text-align: left;
    color: var(--text-dark);
}

.faq-question:hover {
    color: var(--primary-color);
}

.faq-question i {
    transition: var(--transition);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding-bottom: 1.5rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* ========================================
   Quote Section
   ======================================== */
.quote-section {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
}

.quote-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.quote-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.quote-text p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.quote-benefits {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.quote-benefits li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.quote-benefits i {
    color: var(--secondary-color);
}

.quote-form-wrapper {
    background: white;
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.quote-form h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    text-align: center;
}

.form-group {
    margin-bottom: 1.25rem;
}

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

.form-group label {
    display: block;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group small {
    display: block;
    margin-top: 0.25rem;
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
}

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

.contact-item {
    display: flex;
    gap: 1rem;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    color: white;
    font-size: 1.25rem;
}

.contact-details h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.contact-details p,
.contact-details a {
    color: var(--text-light);
}

.contact-details a:hover {
    color: var(--primary-color);
}

.contact-social {
    text-align: center;
}

.contact-social h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

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

.social-links a {
    width: 50px;
    height: 50px;
    background-color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.social-links a:hover {
    background-color: var(--primary-color);
    transform: translateY(-4px);
}

.social-links a:hover i {
    color: white;
}

.social-links i {
    color: var(--primary-color);
    font-size: 1.25rem;
    transition: var(--transition);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background-color: var(--text-dark);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-brand p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.footer-certificates {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-certificates span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.footer-certificates i {
    color: var(--accent-color);
}

.footer-links h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--text-muted);
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
    padding-left: 0.5rem;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 2rem;
    text-align: center;
    color: var(--text-muted);
}

.footer-bottom p {
    margin-bottom: 0.5rem;
}

/* ========================================
   Back to Top Button
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-4px);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .hero-features {
        justify-content: center;
    }

    .hero-cta {
        justify-content: center;
    }

    .trust-badges {
        justify-content: center;
    }

    .hero-image {
        order: -1;
    }

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

    .quote-benefits {
        align-items: center;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .top-features {
        display: none;
    }

    .main-nav {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: white;
        padding: 1rem;
        box-shadow: var(--shadow-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .main-nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 1rem;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero-text h1 {
        font-size: 2rem;
    }

    .hero-features {
        flex-direction: column;
        gap: 1rem;
    }

    .hero-cta {
        flex-direction: column;
    }

    .process-steps {
        flex-direction: column;
    }

    .process-arrow {
        transform: rotate(90deg);
    }

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

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

    .footer-certificates {
        align-items: center;
    }

    .section-header h2 {
        font-size: 1.75rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .ai-banner-content {
        flex-direction: column;
        text-align: center;
    }

    /* Product Page Mobile */
    .filter-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .products-grid-large {
        grid-template-columns: 1fr;
    }

    .product-card-large {
        max-width: 100%;
    }

    /* Blog Page Mobile */
    .featured-article {
        grid-template-columns: 1fr;
    }

    .featured-image {
        min-height: 250px;
    }

    .featured-content {
        padding: 2rem;
    }

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

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

    .newsletter-form {
        flex-direction: column;
    }

    /* Product Detail Mobile */
    .product-detail-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .product-images {
        position: relative;
        top: 0;
    }

    .product-info-detail h1 {
        font-size: 1.75rem;
    }

    .product-actions {
        flex-direction: column;
    }

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

    .use-cases {
        grid-template-columns: 1fr;
    }

    .reviews-summary {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .pricing-table {
        font-size: 0.875rem;
    }

    .pricing-table th,
    .pricing-table td {
        padding: 0.5rem;
    }

    /* Blog Article Mobile */
    .article-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .article-sidebar {
        position: relative;
        top: 0;
        order: -1;
    }

    .article-header h1 {
        font-size: 1.75rem;
    }

    .article-meta-top {
        flex-direction: column;
        gap: 0.75rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .hero-text h1 {
        font-size: 1.75rem;
    }

    .section-header h2 {
        font-size: 1.5rem;
    }

    .products-grid,
    .backing-grid,
    .why-us-grid {
        grid-template-columns: 1fr;
    }

    .quote-form-wrapper {
        padding: 1.5rem;
    }
}

/* ========================================
   Product Page Styles
   ======================================== */

/* Breadcrumb */
.breadcrumb {
    background-color: var(--bg-light);
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-light);
    list-style: none;
    margin: 0;
    padding: 0;
}

.breadcrumb-list li {
    display: flex;
    align-items: center;
}

.breadcrumb-list a {
    color: var(--primary-color);
}

.breadcrumb-list a:hover {
    text-decoration: underline;
}

.breadcrumb-list .separator {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.breadcrumb-list li:last-child {
    color: var(--text-dark);
    font-weight: 500;
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--bg-light) 0%, white 100%);
    padding: 4rem 0;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.25rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* Product Filter */
.product-filter {
    background-color: white;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 70px;
    z-index: 100;
}

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

.filter-group {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-group label {
    font-weight: 600;
    color: var(--text-dark);
}

.filter-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: white;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.sort-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sort-group label {
    font-weight: 500;
    color: var(--text-dark);
}

.sort-group select {
    padding: 0.5rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: white;
    color: var(--text-dark);
    cursor: pointer;
}

/* Products Page Grid */
.products-page {
    padding: 3rem 0;
    background-color: var(--bg-light);
}

.products-grid-large {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.product-card-large {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.product-card-large:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.product-badge.popular {
    background-color: var(--secondary-color);
}

.product-image-large {
    position: relative;
    height: 250px;
    overflow: hidden;
}

.product-image-large img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.product-card-large:hover .product-image-large img {
    transform: scale(1.05);
}

.product-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.product-card-large:hover .product-overlay {
    opacity: 1;
}

.product-info-large {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.product-category {
    font-size: 0.875rem;
    color: var(--primary-color);
    font-weight: 600;
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.875rem;
    color: var(--secondary-color);
}

.product-info-large h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.product-info-large h2 a:hover {
    color: var(--primary-color);
}

.product-info-large > p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    flex: 1;
}

.product-features {
    margin-bottom: 1.5rem;
}

.product-features li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.product-features i {
    color: var(--accent-color);
}

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

.product-price-large {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
}

.product-price-large .from {
    font-size: 0.875rem;
    color: var(--text-light);
}

.product-price-large .price {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

.product-price-large .unit {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    padding: 4rem 0;
    color: white;
    text-align: center;
}

.cta-content h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: 1.5rem;
}

/* ========================================
   Blog Page Styles
   ======================================== */

/* Blog Categories */
.blog-categories {
    background-color: white;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.category-tags {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
}

.category-tag {
    padding: 0.5rem 1.25rem;
    background-color: var(--bg-light);
    border-radius: var(--radius-full);
    font-weight: 500;
    color: var(--text-dark);
    transition: var(--transition);
}

.category-tag:hover,
.category-tag.active {
    background-color: var(--primary-color);
    color: white;
}

/* Featured Post */
.featured-post {
    padding: 3rem 0;
    background-color: var(--bg-light);
}

.featured-article {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 3rem;
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.featured-image {
    position: relative;
    height: 100%;
    min-height: 400px;
}

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

.featured-badge {
    position: absolute;
    top: 1.5rem;
    left: 1.5rem;
    background-color: var(--secondary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.875rem;
}

.featured-content {
    padding: 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.post-meta {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.post-category {
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
}

.post-date,
.post-read {
    font-size: 0.875rem;
    color: var(--text-light);
}

.featured-content h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.featured-content h2 a:hover {
    color: var(--primary-color);
}

.featured-content > p {
    color: var(--text-light);
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

/* Blog Grid */
.blog-grid-section {
    padding: 4rem 0;
    background-color: white;
}

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

.blog-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.blog-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.blog-card {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.featured-post {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

/* ========================================
   About Us Page Styles
   ======================================== */

/* Our Story Section */
.about-story {
    padding: 5rem 0;
    background-color: white;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-content h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.about-content p {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1.25rem;
}

.about-image {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.about-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* Mission & Values */
.mission-values {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

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

.value-card {
    background: white;
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.value-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.value-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.value-icon i {
    font-size: 2rem;
    color: white;
}

.value-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.value-card p {
    color: var(--text-light);
    line-height: 1.6;
}

/* Stats Section */
.about-stats {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    padding: 4rem 0;
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}

.stat-item {
    padding: 1rem;
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Why Choose Us Detailed */
.why-choose-us-detailed {
    padding: 5rem 0;
    background-color: white;
}

.reasons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.reason-item {
    display: flex;
    gap: 1.5rem;
    padding: 2rem;
    background-color: var(--bg-light);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.reason-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.reason-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.reason-icon i {
    font-size: 1.5rem;
    color: white;
}

.reason-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.reason-content p {
    color: var(--text-light);
    line-height: 1.6;
}

/* Our Process Timeline */
.our-process {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

.process-timeline {
    max-width: 800px;
    margin: 0 auto;
}

.timeline-item {
    display: flex;
    gap: 2rem;
    padding: 2rem 0;
    border-bottom: 1px solid var(--border-color);
}

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

.timeline-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    flex-shrink: 0;
}

.timeline-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.timeline-content p {
    color: var(--text-light);
    line-height: 1.6;
}

/* Team Section */
.team-section {
    padding: 5rem 0;
    background-color: white;
}

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

.team-member {
    text-align: center;
    padding: 2rem;
    background-color: var(--bg-light);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.team-member:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.member-avatar {
    font-size: 5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.team-member h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.member-role {
    display: block;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.team-member p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Certifications */
.certifications {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.cert-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.cert-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.cert-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.cert-item span {
    font-weight: 600;
    color: var(--text-dark);
    text-align: center;
}

/* Responsive for About Us */
@media (max-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .reasons-grid {
        grid-template-columns: 1fr;
    }
    
    .reason-item {
        flex-direction: column;
        text-align: center;
    }
    
    .timeline-item {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

.blog-image {
    position: relative;
    height: 220px;
    overflow: hidden;
}

.blog-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.blog-card:hover .blog-image img {
    transform: scale(1.05);
}

.blog-category {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.blog-content {
    padding: 1.5rem;
}

.blog-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    color: var(--text-light);
}

.blog-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.blog-content h3 a:hover {
    color: var(--primary-color);
}

.blog-content > p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-weight: 600;
}

.read-more:hover {
    gap: 0.75rem;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 3rem;
}

.page-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-weight: 600;
    color: var(--text-dark);
    transition: var(--transition);
}

.page-btn:hover,
.page-btn.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.page-btn.next {
    width: auto;
    padding: 0 1rem;
}

.page-dots {
    display: flex;
    align-items: center;
    color: var(--text-muted);
}

/* Newsletter Section */
.newsletter-section {
    background-color: var(--bg-light);
    padding: 4rem 0;
}

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

.newsletter-text h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.newsletter-text p {
    color: var(--text-light);
    font-size: 1.1rem;
}

.newsletter-form {
    display: flex;
    gap: 1rem;
}

.newsletter-form input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* ========================================
   Product Detail Page Styles
   ======================================== */

.product-detail {
    padding: 3rem 0;
    background-color: white;
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.product-images {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.main-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 1rem;
}

.main-image img {
    width: 100%;
    height: auto;
}

.image-zoom {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    width: 50px;
    height: 50px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-md);
}

.thumbnail-gallery {
    display: flex;
    gap: 1rem;
}

.thumbnail {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
}

.thumbnail.active,
.thumbnail:hover {
    border-color: var(--primary-color);
}

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

.product-info-detail {
    padding: 1rem 0;
}

.product-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.product-category-tag {
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
}

.product-rating-large {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.product-rating-large .stars {
    color: var(--secondary-color);
}

.rating-text {
    font-size: 0.875rem;
    color: var(--text-light);
}

.product-info-detail h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.product-short-desc {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.product-price-detail {
    background-color: var(--bg-light);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    margin-bottom: 1.5rem;
}

.price-main {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.price-from {
    font-size: 1rem;
    color: var(--text-light);
}

.price-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

.price-unit {
    font-size: 1rem;
    color: var(--text-muted);
}

.price-note {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 0.5rem;
}

.product-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.product-benefits {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
}

.benefit-item i {
    color: var(--accent-color);
    font-size: 1.25rem;
}

/* Product Tabs */
.product-tabs-section {
    padding: 4rem 0;
    background-color: var(--bg-light);
}

.product-tabs {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.tab-nav {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
}

.tab-nav-btn {
    padding: 1rem 1.5rem;
    font-weight: 600;
    color: var(--text-light);
    white-space: nowrap;
    border-bottom: 3px solid transparent;
    transition: var(--transition);
}

.tab-nav-btn:hover,
.tab-nav-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    padding: 2rem;
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

/* Overview Tab */
.overview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.overview-content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.overview-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 1.5rem 0 0.75rem;
}

.overview-content p {
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.feature-list {
    margin-bottom: 1.5rem;
}

.feature-list li {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

.feature-list i {
    color: var(--accent-color);
    flex-shrink: 0;
}

.use-cases {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.use-case {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
}

.use-case i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

/* Specifications Tab */
.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.spec-card {
    background-color: var(--bg-light);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
}

.spec-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--border-color);
}

.spec-table {
    width: 100%;
}

.spec-table td {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.spec-table td:first-child {
    font-weight: 500;
    color: var(--text-dark);
}

.spec-table td:last-child {
    color: var(--text-light);
    text-align: right;
}

/* Pricing Tab */
.pricing-intro {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.pricing-tables {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-bottom: 2rem;
}

.pricing-table-wrapper h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.pricing-table {
    width: 100%;
    border-collapse: collapse;
}

.pricing-table th,
.pricing-table td {
    padding: 1rem;
    text-align: center;
    border: 1px solid var(--border-color);
}

.pricing-table th {
    background-color: var(--bg-light);
    font-weight: 600;
    color: var(--text-dark);
}

.pricing-table td {
    color: var(--text-light);
}

.pricing-table td:first-child {
    font-weight: 600;
    color: var(--text-dark);
    background-color: var(--bg-light);
}

.pricing-notes {
    background-color: var(--bg-light);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
}

.pricing-notes h4 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.pricing-notes ul {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.pricing-notes li {
    color: var(--text-light);
}

/* Reviews Tab */
.reviews-summary {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.rating-big {
    text-align: center;
}

.rating-number {
    font-size: 4rem;
    font-weight: 800;
    color: var(--text-dark);
    line-height: 1;
}

.stars-large {
    color: var(--secondary-color);
    font-size: 1.5rem;
    margin: 0.5rem 0;
}

.rating-count {
    font-size: 0.875rem;
    color: var(--text-light);
}

.rating-breakdown {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.rating-bar {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.rating-bar span:first-child {
    width: 60px;
    font-size: 0.875rem;
    color: var(--text-light);
}

.rating-bar .bar {
    flex: 1;
    height: 8px;
    background-color: var(--bg-gray);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.rating-bar .fill {
    height: 100%;
    background-color: var(--secondary-color);
    border-radius: var(--radius-full);
}

.rating-bar span:last-child {
    width: 40px;
    font-size: 0.875rem;
    color: var(--text-light);
    text-align: right;
}

.reviews-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.review-item {
    padding: 1.5rem;
    background-color: var(--bg-light);
    border-radius: var(--radius-lg);
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.reviewer-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.reviewer-name {
    font-weight: 600;
    color: var(--text-dark);
}

.verified-badge {
    font-size: 0.75rem;
    color: var(--accent-color);
}

.review-rating {
    color: var(--secondary-color);
}

.review-text {
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 0.75rem;
}

.review-date {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Related Products */
.related-products {
    padding: 4rem 0;
    background-color: white;
}

.related-products h2 {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

/* ========================================
   Blog Article Page Styles
   ======================================== */

.article-header {
    background: linear-gradient(135deg, var(--bg-light) 0%, white 100%);
    padding: 4rem 0 2rem;
    text-align: center;
}

.article-meta-top {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.article-category {
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
}

.article-date,
.article-read {
    font-size: 0.875rem;
    color: var(--text-light);
}

.article-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    max-width: 800px;
    margin: 0 auto 1rem;
    line-height: 1.3;
}

.article-excerpt {
    font-size: 1.25rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto 1.5rem;
}

.article-author {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.author-avatar {
    font-size: 3rem;
    color: var(--primary-color);
}

.author-info {
    text-align: left;
}

.author-name {
    display: block;
    font-weight: 600;
    color: var(--text-dark);
}

.author-title {
    font-size: 0.875rem;
    color: var(--text-light);
}

.article-featured-image {
    padding: 0 0 2rem;
}

.article-featured-image img {
    width: 100%;
    max-height: 500px;
    object-fit: cover;
    border-radius: var(--radius-xl);
}

.article-content {
    padding: 2rem 0 4rem;
    background-color: white;
}

.article-layout {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 4rem;
}

.article-main {
    max-width: 800px;
}

.article-body {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-dark);
}

.article-body .lead {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.article-body h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 2.5rem 0 1rem;
    color: var(--text-dark);
}

.article-body h3 {
    font-size: 1.375rem;
    font-weight: 600;
    margin: 2rem 0 0.75rem;
    color: var(--text-dark);
}

.article-body p {
    margin-bottom: 1.25rem;
}

.article-body ul {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.article-body ul li {
    margin-bottom: 0.5rem;
    list-style-type: disc;
}

.article-image {
    margin: 2rem 0;
}

.article-image img {
    width: 100%;
    border-radius: var(--radius-lg);
}

.article-image figcaption {
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 0.75rem;
}

.coverage-comparison {
    display: grid;
    gap: 1.5rem;
    margin: 2rem 0;
}

.coverage-item {
    background-color: var(--bg-light);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary-color);
}

.coverage-item h4 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.coverage-item p {
    color: var(--text-light);
    margin-bottom: 0.75rem;
}

.coverage-best {
    font-size: 0.875rem;
    color: var(--accent-color);
    font-weight: 600;
}

.info-box {
    background-color: #fef3c7;
    border-left: 4px solid var(--secondary-color);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    margin: 2rem 0;
}

.info-box h4 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.info-box p {
    color: var(--text-dark);
    margin-bottom: 0;
}

.application-guide {
    display: grid;
    gap: 1rem;
    margin: 2rem 0;
}

.application-item {
    background-color: var(--bg-light);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
}

.application-item h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.application-item h4 i {
    color: var(--primary-color);
}

.application-item p {
    margin-bottom: 0.25rem;
}

.cta-box {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    margin: 3rem 0;
}

.cta-box h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: white;
}

.cta-box p {
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.article-tags {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin: 2rem 0;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.tag-label {
    font-weight: 600;
    color: var(--text-dark);
}

.tag {
    padding: 0.375rem 0.875rem;
    background-color: var(--bg-light);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--text-light);
    transition: var(--transition);
}

.tag:hover {
    background-color: var(--primary-color);
    color: white;
}

.article-share {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.share-label {
    font-weight: 600;
    color: var(--text-dark);
}

.share-buttons {
    display: flex;
    gap: 0.5rem;
}

.share-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: var(--transition);
}

.share-btn.facebook { background-color: #1877f2; }
.share-btn.twitter { background-color: #1da1f2; }
.share-btn.linkedin { background-color: #0077b5; }
.share-btn.pinterest { background-color: #bd081c; }

.share-btn:hover {
    transform: translateY(-3px);
}

/* Article Sidebar */
.article-sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.sidebar-widget {
    background-color: var(--bg-light);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    margin-bottom: 1.5rem;
}

.sidebar-widget h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--border-color);
}

.toc-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toc-list a {
    font-size: 0.95rem;
    color: var(--text-light);
    transition: var(--transition);
}

.toc-list a:hover {
    color: var(--primary-color);
    padding-left: 0.5rem;
}

.related-articles {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.related-article {
    display: flex;
    gap: 1rem;
}

.related-article img {
    width: 80px;
    height: 60px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.related-article-info h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    line-height: 1.4;
}

.related-article-info span {
    font-size: 0.8rem;
    color: var(--text-light);
}

.cta-widget {
    text-align: center;
}

.cta-widget p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

/* More Articles */
.more-articles {
    padding: 4rem 0;
    background-color: var(--bg-light);
}

.more-articles h2 {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
    .top-bar,
    .header,
    .back-to-top,
    .quote-section,
    .btn,
    .article-sidebar {
        display: none;
    }

    .hero,
    .products,
    .backing-options,
    .why-us,
    .article-content {
        page-break-inside: avoid;
    }
}