/* ========================================
   ChinaChallengeCoin - Custom Challenge Coins
   Responsive styles, SEO-friendly
   ======================================== */

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #f59e0b;
    --secondary-dark: #d97706;
    --secondary-light: #fbbf24;
    --accent-color: #10b981;
    --gold: var(--secondary-color);
    --gold-dark: var(--secondary-dark);
    --gold-light: var(--secondary-light);
    --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;
}

*, *::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 { max-width: 1280px; margin: 0 auto; padding: 0 1.5rem; }

/* SEO: keep element in DOM for crawlers while hiding it from view */
.seo-hidden { display: none !important; }

/* 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-gold { background-color: var(--gold); color: white; }
.btn-gold:hover { background-color: var(--gold-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); }
.section-eyebrow {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 0.5rem;
}

/* ============ 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(--gold-light); }
.top-contact a { display: flex; align-items: center; gap: 0.5rem; }
.top-contact i { color: var(--gold-light); }
.top-contact a:hover { color: var(--gold-light); }

/* ============ Header ============ */
.header { position: sticky; top: 0; z-index: 1000; background: white; box-shadow: var(--shadow-sm); }
.header-content { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 0.5rem; font-size: 1.4rem; font-weight: 700; color: var(--text-dark); }
.logo-icon { font-size: 1.6rem; }
.logo-text span { color: var(--gold); }
.main-nav ul { display: flex; gap: 2rem; }
.main-nav a { font-weight: 500; color: var(--text-dark); position: relative; }
.main-nav a:hover { color: var(--primary-color); }
.main-nav a::after {
    content: ''; position: absolute; left: 0; bottom: -6px; width: 0; height: 2px;
    background: var(--primary-color); transition: var(--transition);
}
.main-nav a:hover::after { width: 100%; }
.header-actions { display: flex; align-items: center; gap: 1rem; }
.mobile-menu-toggle { display: none; flex-direction: column; gap: 5px; }
.mobile-menu-toggle span { width: 26px; height: 3px; background: var(--text-dark); border-radius: 2px; transition: var(--transition); }

/* ============ Hero ============ */
.hero { background: var(--bg-light); padding: 4rem 0; }
.hero-content { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 3rem; align-items: center; }
.hero-text h1 { font-size: 3rem; font-weight: 800; line-height: 1.15; margin-bottom: 1.25rem; }
.hero-text h1 .highlight { color: var(--primary-color); }
.hero-subtitle { font-size: 1.15rem; color: var(--text-light); margin-bottom: 1.5rem; }
.hero-features { display: flex; gap: 1.5rem; flex-wrap: wrap; margin-bottom: 1.75rem; }
.feature-item { display: flex; align-items: center; gap: 0.5rem; font-weight: 500; }
.feature-item i { color: var(--primary-color); }
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 2rem; }
.trust-badges { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.badge { display: flex; align-items: center; gap: 0.5rem; font-size: 0.9rem; color: var(--text-light); }
.badge i { color: var(--gold); }
.hero-image-wrapper { border-radius: var(--radius-xl); overflow: hidden; box-shadow: var(--shadow-xl); }

/* ============ Guarantee ============ */
.guarantee {
    background: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 100%);
    color: white;
    padding: 4rem 0;
}
.guarantee-content { text-align: center; max-width: 900px; margin: 0 auto; }
.guarantee-content h2 { font-size: 2rem; margin-bottom: 1rem; }
.guarantee-content p { color: #dbeafe; margin-bottom: 2.5rem; }
.guarantee-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-bottom: 2rem; }
.metric-card { background: rgba(255, 255, 255, 0.08); border: 1px solid rgba(255, 255, 255, 0.15); border-radius: var(--radius-lg); padding: 1.75rem 1.5rem; }
.metric-card .metric-value { font-size: 2.5rem; font-weight: 800; color: white; }
.metric-card .metric-label { color: #dbeafe; margin-top: 0.25rem; }

/* ============ Products ============ */
.products { padding: 5rem 0; }
.products-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
.product-card {
    background: white; border: 1px solid var(--border-color); border-radius: var(--radius-lg);
    overflow: hidden; transition: var(--transition); position: relative;
}
.product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-xl); }
.product-badge {
    position: absolute; top: 1rem; left: 1rem; z-index: 2;
    padding: 0.25rem 0.75rem; border-radius: 999px; font-size: 0.75rem; font-weight: 700;
    color: white;
}
.product-badge.new { background: var(--accent-color); }
.product-badge.hot { background: #ef4444; }
.product-image { height: 200px; overflow: hidden; background: var(--bg-gray); }
.product-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.product-card:hover .product-image img { transform: scale(1.05); }
.product-info { padding: 1.5rem; }
.product-info h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 0.5rem; }
.product-info p { color: var(--text-light); font-size: 0.95rem; margin-bottom: 1.25rem; }

/* ============ By Purpose ============ */
.purpose { padding: 5rem 0; background: var(--bg-light); }
.purpose-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.75rem; }
.purpose-card {
    background: white; border: 1px solid var(--border-color); border-radius: var(--radius-lg);
    padding: 2rem; transition: var(--transition);
}
.purpose-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--primary-color); }
.purpose-icon { width: 56px; height: 56px; border-radius: var(--radius-md); background: #fff7ed; display: flex; align-items: center; justify-content: center; margin-bottom: 1.25rem; }
.purpose-icon i { font-size: 1.5rem; color: var(--primary-color); }
.purpose-card h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }
.purpose-card p { color: var(--text-light); font-size: 0.95rem; margin-bottom: 1rem; }
.purpose-links { display: flex; gap: 1rem; }
.purpose-links a { font-size: 0.9rem; font-weight: 600; color: var(--primary-color); }
.purpose-links a:hover { color: var(--primary-dark); }

/* ============ Process ============ */
.process { padding: 5rem 0; }
.process-steps { display: flex; align-items: flex-start; justify-content: center; gap: 1.5rem; flex-wrap: wrap; }
.process-step { text-align: center; max-width: 280px; flex: 1; position: relative; }
.step-number {
    position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
    width: 28px; height: 28px; border-radius: 50%; background: var(--primary-color); color: white;
    font-weight: 700; font-size: 0.9rem; display: flex; align-items: center; justify-content: center;
}
.step-icon { width: 72px; height: 72px; border-radius: 50%; background: #eff6ff; display: flex; align-items: center; justify-content: center; margin: 0 auto 1.25rem; }
.step-icon i { font-size: 1.75rem; color: var(--primary-color); }
.process-step h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
.process-step p { color: var(--text-light); font-size: 0.95rem; }
.process-arrow { font-size: 1.5rem; color: var(--primary-color); align-self: center; }

/* ============ Coin Knowledge ============ */
.coin-knowledge { padding: 5rem 0; background: var(--bg-light); }
.knowledge-tabs { display: flex; justify-content: center; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 2.5rem; }
.tab-btn {
    padding: 0.6rem 1.4rem; border-radius: 999px; border: 2px solid var(--border-color);
    font-weight: 600; color: var(--text-light); transition: var(--transition); background: white;
}
.tab-btn.active { background: var(--primary-color); color: white; border-color: var(--primary-color); }
.tab-btn:hover:not(.active) { border-color: var(--primary-color); color: var(--primary-color); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.edge-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.edge-item {
    background: white; border: 1px solid var(--border-color); border-radius: var(--radius-md);
    padding: 0.5rem; text-align: center; transition: var(--transition);
}
.edge-item:hover { border-color: var(--primary-color); box-shadow: var(--shadow-md); transform: translateY(-3px); }
.edge-item img { width: 100%; aspect-ratio: 2 / 1; object-fit: cover; border-radius: var(--radius-sm); }
.edge-item span { display: block; font-weight: 500; font-size: 0.9rem; padding: 0.6rem 0.25rem 0.4rem; }
.color-swatches { display: grid; grid-template-columns: repeat(6, 1fr); gap: 1rem; }
.color-swatch { text-align: center; }
.color-swatch img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; border-radius: var(--radius-md); border: 1px solid var(--border-color); }
.color-swatch span { display: block; font-size: 0.8rem; color: var(--text-light); margin-top: 0.4rem; }
.size-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.size-card { background: white; border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 1.25rem; text-align: center; }
.size-card .size-icon { font-size: 1.5rem; color: var(--primary-color); margin-bottom: 0.5rem; }
.size-card h4 { font-size: 1rem; margin-bottom: 0.25rem; }
.size-range { color: var(--text-light); font-size: 0.9rem; }
.packaging-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.packaging-item { background: white; border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 0.5rem; text-align: center; transition: var(--transition); }
.packaging-item:hover { border-color: var(--primary-color); box-shadow: var(--shadow-md); transform: translateY(-3px); }
.packaging-item img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; border-radius: var(--radius-sm); }
.packaging-item h4 { font-size: 0.95rem; padding: 0.6rem 0.25rem 0.4rem; }

/* ============ CTA Banner ============ */
.cta { padding: 4rem 0; }
.cta-banner {
    background: linear-gradient(135deg, #b45309 0%, #d97706 100%);
    color: white; border-radius: var(--radius-xl); padding: 3rem 3rem;
    display: flex; align-items: center; justify-content: space-between; gap: 2rem; flex-wrap: wrap;
}
.cta-banner h2 { font-size: 1.9rem; margin-bottom: 0.75rem; }
.cta-banner p { color: #fef3c7; max-width: 560px; }

/* ============ Why Us ============ */
.why-us { padding: 5rem 0; }
.why-us-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.75rem; }
.why-us-card { background: white; border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 2rem; transition: var(--transition); }
.why-us-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.why-us-icon { width: 56px; height: 56px; border-radius: var(--radius-md); background: #eff6ff; display: flex; align-items: center; justify-content: center; margin-bottom: 1.25rem; }
.why-us-icon i { font-size: 1.5rem; color: var(--primary-color); }
.why-us-card h3 { font-size: 1.2rem; margin-bottom: 0.75rem; }
.why-us-card ul li { position: relative; padding-left: 1.25rem; margin-bottom: 0.5rem; color: var(--text-light); font-size: 0.95rem; }
.why-us-card ul li::before { content: '✓'; position: absolute; left: 0; color: var(--accent-color); font-weight: 700; }

/* ============ Testimonials ============ */
.testimonials { padding: 5rem 0; background: var(--bg-light); }
.rating-summary { display: flex; align-items: center; justify-content: center; gap: 1rem; flex-wrap: wrap; }
.stars { color: var(--gold); }
.rating-text { font-weight: 700; }
.review-count { color: var(--text-light); }
.testimonials-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.75rem; margin-top: 3rem; }
.testimonial-card { background: white; border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 2rem; }
.testimonial-rating { color: var(--gold); margin-bottom: 1rem; }
.testimonial-text { color: var(--text-dark); font-style: italic; margin-bottom: 1.25rem; }
.testimonial-author { display: flex; justify-content: space-between; align-items: center; }
.testimonial-author .name { font-weight: 700; }
.testimonial-author .date { color: var(--text-muted); font-size: 0.85rem; }

/* ============ FAQ ============ */
.faq { padding: 5rem 0; }
.faq-grid { max-width: 800px; margin: 0 auto; }
.faq-item { border: 1px solid var(--border-color); border-radius: var(--radius-md); margin-bottom: 1rem; overflow: hidden; }
.faq-question { width: 100%; display: flex; justify-content: space-between; align-items: center; padding: 1.25rem 1.5rem; font-weight: 600; font-size: 1rem; text-align: left; color: var(--text-dark); }
.faq-question i { transition: var(--transition); color: var(--gold); }
.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: 400px; }
.faq-answer p { padding: 0 1.5rem 1.25rem; color: var(--text-light); }

/* ============ Quote ============ */
.quote-section { padding: 5rem 0; background: linear-gradient(135deg, #eff6ff 0%, #f9fafb 100%); }
.quote-content { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; }
.quote-text h2 { font-size: 2rem; margin-bottom: 1rem; }
.quote-text p { color: var(--text-light); margin-bottom: 1.5rem; }
.quote-benefits li { position: relative; padding-left: 1.75rem; margin-bottom: 0.75rem; color: var(--text-dark); }
.quote-benefits li i { position: absolute; left: 0; top: 4px; color: var(--accent-color); }
.quote-form-wrapper { background: white; border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); padding: 2.5rem; }
.quote-form h3 { font-size: 1.4rem; margin-bottom: 1.5rem; }
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-weight: 600; margin-bottom: 0.4rem; font-size: 0.9rem; }
.form-group input, .form-group textarea, .form-group select {
    width: 100%; padding: 0.8rem 1rem; border: 2px solid var(--border-color); border-radius: var(--radius-md);
    font-size: 1rem; font-family: inherit; transition: var(--transition); background: white;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: var(--primary-color); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

/* ============ Contact ============ */
.contact { padding: 5rem 0; }
.contact-grid { display: grid; grid-template-columns: 1.6fr 1fr; gap: 2rem; align-items: stretch; }
.contact-info { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.contact-item { display: flex; gap: 1.1rem; align-items: flex-start; background: white; border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 1.5rem; }
.contact-icon { width: 48px; height: 48px; border-radius: var(--radius-md); background: #eff6ff; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.contact-icon i { font-size: 1.25rem; color: var(--primary-color); }
.contact-details h4 { font-size: 1.05rem; margin-bottom: 0.25rem; }
.contact-details p { color: var(--text-light); }
.contact-details a:hover { color: var(--primary-color); }
.contact-social { background: white; border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 2.5rem 2rem; text-align: center; display: flex; flex-direction: column; justify-content: center; }
.contact-social h3 { font-size: 1.4rem; margin-bottom: 0.75rem; }
.contact-social p { color: var(--text-light); margin-bottom: 1.5rem; }
.social-links { display: flex; gap: 1rem; justify-content: center; }
.social-links a { width: 44px; height: 44px; border-radius: 50%; background: var(--bg-gray); display: flex; align-items: center; justify-content: center; color: var(--text-dark); transition: var(--transition); }
.social-links a:hover { background: var(--primary-color); color: white; transform: translateY(-3px); }

/* ============ Footer ============ */
.footer { background: #111827; color: #d1d5db; padding: 4rem 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 2.5rem; padding-bottom: 3rem; }
.footer-logo { display: flex; align-items: center; gap: 0.5rem; font-size: 1.3rem; font-weight: 700; color: white; margin-bottom: 1rem; }
.footer-brand p { color: #9ca3af; font-size: 0.95rem; margin-bottom: 1.25rem; }
.footer-certificates { display: flex; gap: 1rem; flex-wrap: wrap; }
.footer-certificates span { display: flex; align-items: center; gap: 0.4rem; font-size: 0.85rem; color: #9ca3af; }
.footer-certificates i { color: var(--primary-color); }
.footer-links h4 { color: white; font-size: 1.05rem; margin-bottom: 1.25rem; }
.footer-links ul li { margin-bottom: 0.6rem; }
.footer-links a { color: #9ca3af; font-size: 0.95rem; }
.footer-links a:hover { color: var(--primary-color); }
.footer-bottom { border-top: 1px solid #374151; padding: 1.5rem 0; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem; font-size: 0.9rem; color: #9ca3af; }

/* ============ Back to Top ============ */
.back-to-top {
    position: fixed; bottom: 2rem; right: 2rem; width: 48px; height: 48px; border-radius: 50%;
    background: var(--primary-color); color: white; font-size: 1.2rem; box-shadow: var(--shadow-lg);
    display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden;
    transform: translateY(20px); transition: var(--transition); z-index: 900;
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--primary-dark); }

/* ============ Subpage hero ============ */
.page-hero { background: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 100%); color: white; padding: 4rem 0; text-align: center; }
.page-hero h1 { font-size: 2.75rem; margin-bottom: 1rem; }
.page-hero p { color: #dbeafe; max-width: 720px; margin: 0 auto; font-size: 1.15rem; }

/* ============ 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; flex-wrap: wrap; list-style: none; margin: 0; padding: 0; font-size: 0.875rem; color: var(--text-light); }
.breadcrumb-list li { display: flex; align-items: center; font-size: 0.9rem; color: var(--text-light); }
.breadcrumb-list li a { color: var(--primary-color); }
.breadcrumb-list li 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; }

/* ============ About page ============ */
.about-story { padding: 5rem 0; }
.about-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 3rem; align-items: center; }
.about-content h2 { font-size: 2rem; margin-bottom: 1.25rem; }
.about-content p { color: var(--text-light); margin-bottom: 1rem; }
.about-image img { border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); }

.mission-values { padding: 5rem 0; background: var(--bg-light); }
.values-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.75rem; }
.value-card { background: white; border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 2rem; text-align: center; transition: var(--transition); }
.value-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.value-icon { width: 56px; height: 56px; border-radius: var(--radius-md); background: #fff7ed; display: flex; align-items: center; justify-content: center; margin: 0 auto 1.25rem; }
.value-icon i { font-size: 1.5rem; color: var(--primary-color); }
.value-card h3 { font-size: 1.2rem; margin-bottom: 0.75rem; }
.value-card p { color: var(--text-light); font-size: 0.95rem; }

.about-stats { padding: 4rem 0; background: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 100%); color: white; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; text-align: center; }
.stat-number { display: block; font-size: 2.5rem; font-weight: 800; color: white; }
.stat-label { color: #dbeafe; }

.why-choose-us-detailed { padding: 5rem 0; }
.reasons-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.75rem; }
.reason-item { display: flex; gap: 1.25rem; background: white; border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 1.75rem; transition: var(--transition); }
.reason-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.reason-icon { width: 52px; height: 52px; border-radius: var(--radius-md); background: #eff6ff; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.reason-icon i { font-size: 1.25rem; color: var(--primary-color); }
.reason-content h3 { font-size: 1.15rem; margin-bottom: 0.4rem; }
.reason-content p { color: var(--text-light); font-size: 0.95rem; }

.our-process { padding: 5rem 0; background: var(--bg-light); }
.process-timeline { max-width: 800px; margin: 0 auto; }
.timeline-item { display: flex; gap: 1.5rem; margin-bottom: 2rem; }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-number { font-size: 1.5rem; font-weight: 800; color: var(--primary-color); flex-shrink: 0; width: 48px; }
.timeline-content h3 { font-size: 1.2rem; margin-bottom: 0.4rem; }
.timeline-content p { color: var(--text-light); }

.team-section { padding: 5rem 0; }
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.75rem; }
.team-member { background: white; border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 2rem; text-align: center; transition: var(--transition); }
.team-member:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.member-avatar { font-size: 4rem; color: var(--text-muted); margin-bottom: 1rem; }
.team-member h3 { font-size: 1.15rem; margin-bottom: 0.25rem; }
.member-role { display: block; color: var(--primary-color); font-size: 0.85rem; font-weight: 600; margin-bottom: 0.75rem; }
.team-member p { color: var(--text-light); font-size: 0.9rem; }

.certifications { padding: 4rem 0; background: var(--bg-light); }
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.cert-item { background: white; border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 1.75rem; text-align: center; }
.cert-item i { font-size: 2rem; color: var(--primary-color); margin-bottom: 0.75rem; }
.cert-item span { font-weight: 600; }

.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: 0.75rem; }
.cta-content p { color: #dbeafe; margin-bottom: 1.5rem; }
.cta-content .btn { margin-top: 0.5rem; }

/* ============ Page header (light) ============ */
.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 { color: var(--text-light); max-width: 720px; margin: 0 auto; font-size: 1.15rem; }

/* ============ Products page (patchhub-style large cards) ============ */
.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: flex-end; align-items: center; padding-top: 1rem; border-top: 1px solid var(--border-color); }
.product-price-large { display: flex; align-items: baseline; gap: 0.5rem; }
.product-price-large .price-large { font-size: 1.5rem; font-weight: 800; color: var(--text-dark); }
.product-price-large .price-label { color: var(--text-light); font-size: 0.875rem; }

/* ============ Product detail page ============ */
.product-detail { padding: 3rem 0 1.5rem; }
.product-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: start; }
.product-images { position: sticky; top: 90px; }
.main-image { border-radius: var(--radius-xl); overflow: hidden; border: 1px solid var(--border-color); box-shadow: var(--shadow-md); background: var(--bg-gray); }
.main-image img { width: 100%; height: auto; display: block; }
.thumbnail-gallery { display: flex; gap: 0.75rem; margin-top: 1rem; flex-wrap: wrap; }
.thumbnail { width: 76px; height: 76px; border-radius: var(--radius-md); overflow: hidden; border: 2px solid var(--border-color); cursor: pointer; opacity: 0.65; transition: var(--transition); }
.thumbnail.active { border-color: var(--primary-color); opacity: 1; }
.thumbnail:hover { opacity: 1; }
.thumbnail img { width: 100%; height: 100%; object-fit: cover; }

.product-header { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; margin-bottom: 0.75rem; }
.product-category-tag { background: #eff6ff; color: var(--primary-color); padding: 0.3rem 0.9rem; border-radius: 999px; font-size: 0.8rem; font-weight: 600; }
.product-rating-large { display: flex; align-items: center; gap: 0.5rem; }
.product-rating-large .stars { color: var(--gold); font-size: 0.9rem; }
.product-rating-large .rating-text { color: var(--text-muted); font-size: 0.85rem; }
.product-info-detail h1 { font-size: 2.25rem; margin-bottom: 1rem; line-height: 1.25; }
.product-short-desc { color: var(--text-light); margin-bottom: 1.5rem; font-size: 1.05rem; }
.product-actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.75rem; }
.product-benefits { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem 1.25rem; border-top: 1px solid var(--border-color); padding-top: 1.5rem; }
.benefit-item { display: flex; align-items: center; gap: 0.5rem; font-size: 0.92rem; color: var(--text-dark); }
.benefit-item i { color: var(--accent-color); }

.product-tabs-section { padding: 1.5rem 0 4rem; }
.product-tabs { background: white; border: 1px solid var(--border-color); border-radius: var(--radius-xl); overflow: hidden; }
.tab-nav { display: flex; border-bottom: 1px solid var(--border-color); flex-wrap: wrap; background: var(--bg-light); }
.tab-nav-btn { padding: 1rem 1.75rem; font-weight: 600; color: var(--text-light); border-bottom: 3px solid transparent; transition: var(--transition); }
.tab-nav-btn.active { color: var(--primary-color); border-bottom-color: var(--primary-color); background: white; }
.tab-nav-btn:hover:not(.active) { color: var(--primary-color); }
.tab-content { padding: 2.5rem; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.overview-grid { display: grid; grid-template-columns: 1.35fr 0.65fr; gap: 2.5rem; align-items: start; }
.overview-content h2, .tab-panel h2 { font-size: 1.5rem; margin-bottom: 1rem; }
.overview-content h3 { font-size: 1.15rem; margin: 1.5rem 0 0.75rem; }
.overview-content p { color: var(--text-light); margin-bottom: 1rem; line-height: 1.8; }
.feature-list li { position: relative; padding-left: 1.6rem; margin-bottom: 0.65rem; color: var(--text-light); line-height: 1.7; }
.feature-list li i { position: absolute; left: 0; top: 4px; color: var(--accent-color); }
.feature-list li strong { color: var(--text-dark); }
.use-cases { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.use-case { display: flex; align-items: center; gap: 0.6rem; background: var(--bg-light); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 0.8rem 1rem; }
.use-case i { color: var(--primary-color); }
.use-case span { font-size: 0.9rem; font-weight: 500; }
.overview-image img { border-radius: var(--radius-lg); }

.spec-cards-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.spec-card { background: var(--bg-light); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 1.5rem; }
.spec-card h3 { font-size: 1.05rem; margin-bottom: 1rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--border-color); color: var(--primary-color); }
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table tr { border-bottom: 1px solid var(--border-color); }
.spec-table tr:last-child { border-bottom: none; }
.spec-table td { padding: 0.6rem 0; font-size: 0.9rem; vertical-align: top; }
.spec-table td:first-child { color: var(--text-muted); width: 45%; font-weight: 500; }
.spec-table td:last-child { color: var(--text-dark); font-weight: 600; }

.reviews-summary { display: grid; grid-template-columns: auto 1fr; gap: 2.5rem; align-items: center; margin-bottom: 2rem; }
.rating-big { text-align: center; }
.rating-number { font-size: 3rem; font-weight: 800; color: var(--text-dark); display: block; line-height: 1; }
.stars-large { color: var(--gold); margin: 0.4rem 0; }
.rating-count { color: var(--text-muted); font-size: 0.85rem; }
.rating-breakdown { display: flex; flex-direction: column; gap: 0.5rem; }
.rating-bar { display: grid; grid-template-columns: 60px 1fr 40px; gap: 0.75rem; align-items: center; font-size: 0.85rem; color: var(--text-light); }
.rating-bar .bar { height: 8px; background: var(--bg-gray); border-radius: 999px; overflow: hidden; }
.rating-bar .fill { height: 100%; background: var(--gold); border-radius: 999px; }
.reviews-list { display: flex; flex-direction: column; gap: 1.5rem; }
.review-item { border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 1.5rem; }
.review-header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 0.75rem; margin-bottom: 0.75rem; }
.reviewer-info { display: flex; align-items: center; gap: 0.75rem; }
.reviewer-name { font-weight: 700; }
.verified-badge { color: var(--accent-color); font-size: 0.8rem; }
.review-rating { color: var(--gold); font-size: 0.85rem; }
.review-text { color: var(--text-light); font-style: italic; margin-bottom: 0.5rem; }
.review-date { color: var(--text-muted); font-size: 0.82rem; }

.related-products { padding: 4rem 0; background-color: white; }
.related-products h2 { text-align: center; font-size: 2rem; font-weight: 700; color: var(--text-dark); margin-bottom: 2rem; }
/* Match patchhub related-product card sizing inside the detail page */
.related-products .products-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
.related-products .product-image { aspect-ratio: auto; height: 200px; }
.related-products .product-card { background: white; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); transition: var(--transition); position: relative; }
.related-products .product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-xl); }
.related-products .product-info { padding: 1.5rem; }
.related-products .product-info h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 0.5rem; color: var(--text-dark); }
.related-products .product-info p { color: var(--text-light); font-size: 0.9rem; margin-bottom: 1.25rem; line-height: 1.5; }
.related-products .product-info .btn { margin-top: 0; }

/* ============ Blog list ============ */
.blog-section { padding: 4rem 0; }
.featured-article { display: grid; grid-template-columns: 1.1fr 1fr; background: white; border: 1px solid var(--border-color); border-radius: var(--radius-xl); overflow: hidden; margin-bottom: 3rem; }
.featured-image { position: relative; min-height: 320px; }
.featured-image img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.featured-badge { position: absolute; top: 1rem; left: 1rem; background: var(--gold); color: white; padding: 0.35rem 1rem; border-radius: 999px; font-size: 0.8rem; font-weight: 700; z-index: 2; }
.featured-content { padding: 2.5rem; display: flex; flex-direction: column; justify-content: center; }
.post-meta { display: flex; gap: 1.25rem; flex-wrap: wrap; margin-bottom: 1rem; font-size: 0.85rem; color: var(--text-light); }
.post-category { color: var(--primary-color); font-weight: 600; }
.featured-content h2 { font-size: 1.75rem; margin-bottom: 1rem; line-height: 1.3; }
.featured-content h2 a { color: var(--text-dark); }
.featured-content h2 a:hover { color: var(--primary-color); }
.featured-content p { color: var(--text-light); margin-bottom: 1.5rem; }

.blog-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.blog-card { background: white; border: 1px solid var(--border-color); border-radius: var(--radius-lg); overflow: hidden; transition: var(--transition); display: flex; flex-direction: column; }
.blog-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.blog-image { position: relative; aspect-ratio: 16 / 10; overflow: hidden; }
.blog-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.blog-card:hover .blog-image img { transform: scale(1.05); }
.blog-category { position: absolute; top: 1rem; left: 1rem; background: rgba(37, 99, 235, 0.92); color: white; padding: 0.3rem 0.85rem; border-radius: 999px; font-size: 0.75rem; font-weight: 600; z-index: 2; }
.blog-content { padding: 1.5rem; display: flex; flex-direction: column; flex: 1; }
.blog-meta { display: flex; gap: 1rem; margin-bottom: 0.75rem; font-size: 0.82rem; color: var(--text-muted); }
.blog-content h3 { font-size: 1.1rem; margin-bottom: 0.5rem; line-height: 1.4; }
.blog-content h3 a { color: var(--text-dark); }
.blog-content h3 a:hover { color: var(--primary-color); }
.blog-content p { color: var(--text-light); font-size: 0.92rem; margin-bottom: 1rem; }
.read-more { margin-top: auto; font-weight: 600; font-size: 0.9rem; color: var(--primary-color); }
.read-more:hover { color: var(--primary-dark); }
.pagination { display: flex; justify-content: center; margin-top: 3rem; }
.page-info { color: var(--text-light); font-size: 0.9rem; }

/* ============ Blog article ============ */
.article-layout { display: grid; grid-template-columns: 1fr 320px; gap: 2.5rem; align-items: start; padding: 3rem 0 4rem; }
.article-main { min-width: 0; }
.article-meta { display: flex; gap: 1.25rem; flex-wrap: wrap; justify-content: center; margin-bottom: 1rem; font-size: 0.85rem; color: var(--text-light); }
.article-category { color: var(--primary-color); font-weight: 600; }
.article-main h1 { font-size: 2.25rem; text-align: center; margin-bottom: 0.75rem; line-height: 1.25; }
.article-byline { text-align: center; color: var(--text-muted); font-size: 0.9rem; margin-bottom: 1.5rem; }
.article-intro { border: 1px solid var(--border-color); background: var(--bg-light); padding: 1.25rem 1.5rem; border-radius: var(--radius-md); margin-bottom: 2rem; color: var(--text-light); }
.article-featured-image { margin-bottom: 2rem; }
.article-featured-image img { display: block; width: 100%; height: auto; border-radius: var(--radius-lg); }
.article-image { margin: 1.75rem 0; }
.article-image img { display: block; width: 100%; height: auto; border-radius: var(--radius-lg); }

/* Article comparison tables — card shell, blue header, zebra rows */
.article-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: 2rem 0;
    font-size: 0.925rem;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}
.article-table thead th {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: #fff;
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.02em;
    text-align: left;
    padding: 0.85rem 1.1rem;
    vertical-align: bottom;
}
.article-table thead th:first-child { border-top-left-radius: calc(var(--radius-lg) - 1px); }
.article-table thead th:last-child { border-top-right-radius: calc(var(--radius-lg) - 1px); }
.article-table tbody td {
    padding: 0.85rem 1.1rem;
    color: var(--text-light);
    line-height: 1.6;
    vertical-align: top;
    border-bottom: 1px solid var(--border-color);
}
.article-table tbody tr:nth-child(even) { background: var(--bg-light); }
.article-table tbody tr:hover { background: #eff6ff; }
.article-table tbody tr:last-child td { border-bottom: none; }
.article-table tbody td:first-child { color: var(--text-dark); font-weight: 600; }
.article-table tbody tr:last-child td:first-child { border-bottom-left-radius: calc(var(--radius-lg) - 1px); }
.article-table tbody tr:last-child td:last-child { border-bottom-right-radius: calc(var(--radius-lg) - 1px); }
@media (max-width: 768px) {
    .article-table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
    .article-table thead th { white-space: nowrap; }
    .article-table tbody td { min-width: 7.5rem; }
}

.article-body h2 { font-size: 1.5rem; margin: 2rem 0 0.75rem; }
.article-body h3 { font-size: 1.2rem; margin: 1.5rem 0 0.5rem; }
.article-body p { color: var(--text-light); margin-bottom: 1.1rem; line-height: 1.8; }
.article-body ul, .article-body ol { margin: 0 0 1.25rem 1.5rem; color: var(--text-light); line-height: 1.8; }
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 0.5rem; }
.article-body a { color: var(--primary-color); font-weight: 500; }
.article-body a:hover { text-decoration: underline; }
.article-body strong { color: var(--text-dark); }
.article-note { font-size: 0.9rem; color: var(--text-muted); border-left: 3px solid var(--primary-color); background: var(--bg-light); padding: 0.85rem 1.1rem; border-radius: 0 var(--radius-md) var(--radius-md) 0; margin: 1.25rem 0 1.5rem; line-height: 1.7; }
.cta-box { background: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 100%); color: white; border-radius: var(--radius-lg); padding: 2rem; margin: 2rem 0; }
.cta-box h3 { font-size: 1.3rem; margin-bottom: 0.5rem; }
.cta-box p { color: #dbeafe; margin-bottom: 1.25rem; }
.article-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--border-color); }
.tag-label { color: var(--text-muted); font-size: 0.9rem; margin-right: 0.25rem; }
.tag { background: var(--bg-gray); color: var(--text-light); padding: 0.35rem 0.85rem; border-radius: 999px; font-size: 0.8rem; }
.tag:hover { background: var(--primary-color); color: white; }
.article-share { display: flex; align-items: center; gap: 1rem; margin-top: 1.5rem; }
.share-label { color: var(--text-muted); font-size: 0.9rem; }
.share-buttons { display: flex; gap: 0.5rem; }
.share-btn { width: 38px; height: 38px; border-radius: 50%; background: var(--bg-gray); color: var(--text-dark); display: flex; align-items: center; justify-content: center; transition: var(--transition); }
.share-btn:hover { background: var(--primary-color); color: white; }

.article-sidebar { position: sticky; top: 100px; display: flex; flex-direction: column; gap: 1.5rem; }
.sidebar-widget { background: white; border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 1.5rem; }
.sidebar-widget h3 { font-size: 1.1rem; margin-bottom: 1rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--border-color); }
.toc-list li { margin-bottom: 0.6rem; }
.toc-list a { color: var(--text-light); font-size: 0.9rem; }
.toc-list a:hover { color: var(--primary-color); }
.related-articles { display: flex; flex-direction: column; gap: 1rem; }
.related-article { display: flex; gap: 0.85rem; align-items: center; }
.related-article img { width: 56px; height: 56px; border-radius: var(--radius-md); object-fit: cover; flex-shrink: 0; }
.related-article-info h4 { font-size: 0.9rem; margin-bottom: 0.2rem; color: var(--text-dark); }
.related-article-info span { font-size: 0.78rem; color: var(--text-muted); }
.cta-widget { background: linear-gradient(135deg, #b45309 0%, #d97706 100%); color: white; border: none; }
.cta-widget h3 { border-bottom-color: rgba(255, 255, 255, 0.25); }
.cta-widget p { color: #fef3c7; font-size: 0.9rem; margin-bottom: 1rem; }

/* ============ Notification ============ */
.notification {
    position: fixed; top: 100px; right: 20px; z-index: 10000;
    padding: 1rem 1.5rem; border-radius: 0.5rem; color: white;
    box-shadow: var(--shadow-lg); animation: slideIn 0.3s ease;
}
.notification-success { background: var(--accent-color); }
.notification-error { background: #ef4444; }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ============ Responsive ============ */
@media (max-width: 1024px) {
    .products-grid, .purpose-grid { grid-template-columns: repeat(2, 1fr); }
    .why-us-grid { grid-template-columns: repeat(2, 1fr); }
    .edge-grid, .size-cards, .packaging-grid { grid-template-columns: repeat(2, 1fr); }
    .color-swatches { grid-template-columns: repeat(4, 1fr); }
    .values-grid, .stats-grid, .team-grid, .cert-grid { grid-template-columns: repeat(2, 1fr); }
    .product-detail-grid { grid-template-columns: 1fr; }
    .product-images { position: static; }
    .overview-grid { grid-template-columns: 1fr; }
    .reviews-summary { grid-template-columns: 1fr; }
    .spec-cards-grid { grid-template-columns: 1fr; }
    .blog-grid { grid-template-columns: repeat(3, 1fr); }
    .article-layout { grid-template-columns: 1fr; }
    .article-sidebar { position: static; }
    .hero-text h1 { font-size: 2.5rem; }
    .products-grid-large { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .main-nav { display: none; position: absolute; top: 72px; left: 0; right: 0; background: white; box-shadow: var(--shadow-lg); }
    .main-nav.active { display: block; }
    .main-nav ul { flex-direction: column; padding: 1rem 1.5rem; gap: 1rem; }
    .mobile-menu-toggle { display: flex; }
    .header-actions .btn { display: none; }
    .hero-content { grid-template-columns: 1fr; }
    .hero-image { order: -1; }
    .hero-text h1 { font-size: 2rem; }
    .products-grid, .purpose-grid, .why-us-grid { grid-template-columns: 1fr; }
    .testimonials-grid { grid-template-columns: 1fr; }
    .quote-content { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .contact-info { grid-template-columns: 1fr; }
    .guarantee-metrics { grid-template-columns: 1fr; }
    .edge-grid, .size-cards, .packaging-grid { grid-template-columns: 1fr; }
    .color-swatches { grid-template-columns: repeat(3, 1fr); }
    .about-grid { grid-template-columns: 1fr; }
    .values-grid, .stats-grid, .team-grid, .cert-grid, .reasons-grid { grid-template-columns: 1fr; }
    .feature-grid, .specs-grid, .use-cases, .product-benefits { grid-template-columns: 1fr; }
    .products-grid-large { grid-template-columns: 1fr; }
    .product-card-large { max-width: 100%; }
    .blog-grid { grid-template-columns: 1fr; }
    .featured-article { grid-template-columns: 1fr; }
    .featured-image { min-height: 220px; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .section-header h2 { font-size: 1.75rem; }
    .process-steps { flex-direction: column; align-items: center; }
    .process-arrow { transform: rotate(90deg); }
}