/* ============================================================
   Xinyi Tech - Smart LED Lighting B2B Trade Platform
   Inspired by Govee design language
   ============================================================ */

/* CSS Variables — Light Theme */
:root {
    --color-bg: #ffffff;
    --color-bg-secondary: #f5f5f7;
    --color-bg-tertiary: #e8e8ed;
    --color-text: #1d1d1f;
    --color-text-secondary: #6e6e73;
    --color-text-tertiary: #aeaeb2;
    --color-border: #d2d2d7;
    --color-border-light: #e5e5ea;
    
    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-accent-soft: #eff6ff;
    --color-accent-dark: #1e40af;
    
    --color-success: #16a34a;
    --color-success-bg: #f0fdf4;
    --color-warning: #f59e0b;
    --color-warning-bg: #fffbeb;
    --color-error: #dc2626;
    --color-error-bg: #fef2f2;
    
    --color-sale: #dc2626;
    --color-sale-soft: #fef2f2;
    
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
    
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    
    --header-height: 64px;
    --max-width: 1280px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme */
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #000000;
        --color-bg-secondary: #1c1c1e;
        --color-bg-tertiary: #2c2c2e;
        --color-text: #f5f5f7;
        --color-text-secondary: #a1a1a6;
        --color-text-tertiary: #6e6e73;
        --color-border: #38383a;
        --color-border-light: #2c2c2e;
        
        --color-accent: #3b82f6;
        --color-accent-hover: #60a5fa;
        --color-accent-soft: #1e3a5f;
        --color-accent-dark: #93c5fd;
        
        --color-success: #22c55e;
        --color-success-bg: #14532d;
        --color-warning: #fbbf24;
        --color-warning-bg: #713f12;
        --color-error: #ef4444;
        --color-error-bg: #7f1d1d;
        
        --color-sale: #ef4444;
        --color-sale-soft: #7f1d1d;
        
        --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
        --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
        --shadow-lg: 0 8px 30px rgba(0,0,0,0.5);
        --shadow-xl: 0 20px 60px rgba(0,0,0,0.6);
    }
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    line-height: 1.3;
    font-weight: 600;
    letter-spacing: -0.02em;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}
.section-header h2 {
    margin-bottom: 12px;
}
.section-header p {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================================
   Top Bar
   ============================================================ */
.topbar {
    background: var(--color-accent-soft);
    border-bottom: 1px solid var(--color-border-light);
    font-size: 0.85rem;
    overflow: hidden;
}
.topbar-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 8px 24px;
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}
.topbar-item {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--color-text-secondary);
    white-space: nowrap;
}
.topbar-item .icon {
    font-size: 1.1rem;
}
.topbar-item a {
    color: var(--color-accent);
    font-weight: 500;
}

/* ============================================================
   Header / Navigation
   ============================================================ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border-light);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}
.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-text);
    white-space: nowrap;
}
.logo:hover {
    color: var(--color-accent);
}
.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--color-accent), #8b5cf6);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.2rem;
    font-weight: 800;
}

/* Main Nav */
.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}
.main-nav a {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition);
}
.main-nav a:hover,
.main-nav a.active {
    color: var(--color-text);
    background: var(--color-bg-secondary);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}
.header-actions .btn-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all var(--transition);
}
.header-actions .btn-icon:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

.btn-inquiry {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    background: var(--color-accent);
    color: #fff !important;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}
.btn-inquiry:hover {
    background: var(--color-accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    cursor: pointer;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    padding: 8px;
}
.menu-toggle span {
    display: block;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition);
}
.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Nav */
.mobile-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    padding: 24px;
    z-index: 999;
    overflow-y: auto;
}
.mobile-nav.active {
    display: block;
}
.mobile-nav a {
    display: block;
    padding: 14px 16px;
    color: var(--color-text);
    font-size: 1.05rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: background var(--transition);
}
.mobile-nav a:hover,
.mobile-nav a.active {
    background: var(--color-bg-secondary);
}

/* ============================================================
   Hero Slider
   ============================================================ */
.hero {
    position: relative;
    overflow: hidden;
    background: var(--color-bg-secondary);
}
.hero-slider {
    position: relative;
    width: 100%;
    height: 520px;
}
.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.6s ease;
    display: flex;
    align-items: center;
}
.hero-slide.active {
    opacity: 1;
}
.hero-slide-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}
.hero-content h1 {
    font-size: 2.8rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
    line-height: 1.15;
}
.hero-content p {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    margin-bottom: 28px;
    max-width: 480px;
}
.hero-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}
.hero-image img {
    max-height: 400px;
    object-fit: contain;
    border-radius: var(--radius-lg);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: var(--color-accent);
    color: #fff !important;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}
.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: transparent;
    color: var(--color-text);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}
.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.hero-dots {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
}
.hero-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-border);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
}
.hero-dot.active {
    background: var(--color-accent);
    width: 28px;
    border-radius: 5px;
}

/* ============================================================
   Product Tabs
   ============================================================ */
.product-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}
.product-tab {
    padding: 10px 24px;
    border: 1px solid var(--color-border);
    background: transparent;
    color: var(--color-text-secondary);
    border-radius: var(--radius-xl);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}
.product-tab:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}
.product-tab.active {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

/* Product Grid */
.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}
.product-tab-content {
    display: none;
}
.product-tab-content.active {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

/* Product Card */
.product-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border-light);
    transition: all var(--transition);
    position: relative;
}
.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-border);
}
.product-card-image {
    position: relative;
    aspect-ratio: 1 / 1;
    background: var(--color-bg-secondary);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}
.product-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.product-card:hover .product-card-image img {
    transform: scale(1.05);
}
.product-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    z-index: 2;
}
.badge-sale {
    background: var(--color-sale);
    color: #fff;
}
.badge-new {
    background: var(--color-success);
    color: #fff;
}
.badge-hot {
    background: var(--color-warning);
    color: #fff;
}
.product-countdown {
    position: absolute;
    bottom: 12px;
    left: 12px;
    right: 12px;
    background: rgba(0,0,0,0.75);
    color: #fff;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    text-align: center;
    font-weight: 500;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.product-card-body {
    padding: 16px;
}
.product-card-category {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
    margin-bottom: 4px;
}
.product-card-title {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 8px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.product-card-price {
    display: flex;
    align-items: center;
    gap: 8px;
}
.price-current {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-text);
}
.price-original {
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    text-decoration: line-through;
}
.price-discount {
    font-size: 0.8rem;
    color: var(--color-sale);
    font-weight: 600;
}
.product-card-footer {
    margin-top: 12px;
    display: flex;
    gap: 8px;
}
.product-card-footer .btn-sm {
    flex: 1;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
}
.btn-sm-primary {
    background: var(--color-accent);
    color: #fff;
    border: none;
}
.btn-sm-primary:hover {
    background: var(--color-accent-hover);
}
.btn-sm-outline {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}
.btn-sm-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* View More */
.view-more {
    text-align: center;
    margin-top: 8px;
}
.view-more a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-accent);
    font-weight: 600;
    font-size: 0.95rem;
}
.view-more a:hover {
    gap: 10px;
}

/* ============================================================
   Category Grid
   ============================================================ */
.category-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
}
.category-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 28px 16px;
    border-radius: var(--radius-lg);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-light);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    color: var(--color-text);
}
.category-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent);
    background: var(--color-accent-soft);
}
.category-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
}
.category-name {
    font-size: 0.85rem;
    font-weight: 600;
}

/* ============================================================
   Technology Showcase
   ============================================================ */
.tech-showcase {
    background: var(--color-bg-secondary);
}
.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.tech-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition);
}
.tech-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.tech-card-image {
    aspect-ratio: 16 / 10;
    background: var(--color-bg-tertiary);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}
.tech-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.tech-card-body {
    padding: 20px;
}
.tech-card-body h3 {
    font-size: 1.1rem;
    margin-bottom: 6px;
}
.tech-card-body p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

/* ============================================================
   Testimonials / Social Proof
   ============================================================ */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}
.testimonial-card {
    padding: 24px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
    text-align: center;
    transition: all var(--transition);
}
.testimonial-card:hover {
    border-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}
.testimonial-logo {
    width: 80px;
    height: 40px;
    margin: 0 auto 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
}
.testimonial-text {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    font-style: italic;
}
.testimonial-medals {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}
.medal-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

/* ============================================================
   Trust Badges
   ============================================================ */
.trust-section {
    border-top: 1px solid var(--color-border-light);
    border-bottom: 1px solid var(--color-border-light);
}
.trust-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 20px;
}
.trust-item {
    text-align: center;
    padding: 16px 8px;
}
.trust-icon {
    font-size: 2rem;
    margin-bottom: 10px;
    color: var(--color-accent);
}
.trust-title {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 4px;
}
.trust-desc {
    font-size: 0.78rem;
    color: var(--color-text-secondary);
}

/* ============================================================
   Blog & News
   ============================================================ */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.blog-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border-light);
    transition: all var(--transition);
    background: var(--color-bg);
}
.blog-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}
.blog-card-image {
    aspect-ratio: 16 / 10;
    background: var(--color-bg-secondary);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-tertiary);
    font-size: 2rem;
}
.blog-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.blog-card-body {
    padding: 16px;
}
.blog-card-date {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
    margin-bottom: 6px;
}
.blog-card-title {
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ============================================================
   Newsletter
   ============================================================ */
.newsletter {
    background: linear-gradient(135deg, var(--color-accent-soft), var(--color-bg));
    border-radius: var(--radius-xl);
    padding: 56px 48px;
    margin: 80px 0;
    text-align: center;
}
.newsletter h2 {
    margin-bottom: 12px;
}
.newsletter p {
    color: var(--color-text-secondary);
    margin-bottom: 28px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}
.newsletter-form {
    display: flex;
    gap: 10px;
    max-width: 460px;
    margin: 0 auto;
}
.newsletter-form input[type="email"] {
    flex: 1;
    padding: 14px 18px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    background: var(--color-bg);
    color: var(--color-text);
    outline: none;
    transition: border-color var(--transition);
}
.newsletter-form input[type="email"]:focus {
    border-color: var(--color-accent);
}
.newsletter-form button {
    padding: 14px 28px;
    background: var(--color-accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}
.newsletter-form button:hover {
    background: var(--color-accent-hover);
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border-light);
    padding: 56px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}
.footer-col h4 {
    font-size: 0.95rem;
    margin-bottom: 16px;
    color: var(--color-text);
}
.footer-col a {
    display: block;
    padding: 5px 0;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}
.footer-col a:hover {
    color: var(--color-accent);
}
.footer-brand p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
    max-width: 300px;
}
.footer-social {
    display: flex;
    gap: 12px;
}
.footer-social a {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    transition: all var(--transition);
}
.footer-social a:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: var(--color-accent-soft);
}
.footer-bottom {
    border-top: 1px solid var(--color-border-light);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    flex-wrap: wrap;
    gap: 12px;
}
.footer-bottom-links {
    display: flex;
    gap: 20px;
}
.footer-bottom-links a {
    color: var(--color-text-tertiary);
}

/* ============================================================
   Page Hero (Sub Pages)
   ============================================================ */
.page-hero {
    background: var(--color-bg-secondary);
    padding: 60px 0;
    text-align: center;
    border-bottom: 1px solid var(--color-border-light);
}
.page-hero h1 {
    font-size: 2.2rem;
    margin-bottom: 8px;
}
.page-hero p {
    color: var(--color-text-secondary);
    font-size: 1.05rem;
}
.breadcrumb {
    display: flex;
    justify-content: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    margin-bottom: 16px;
}
.breadcrumb a {
    color: var(--color-text-tertiary);
}
.breadcrumb .sep {
    color: var(--color-text-tertiary);
}

/* ============================================================
   Products Page
   ============================================================ */
.products-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid var(--color-border-light);
    margin-bottom: 32px;
    flex-wrap: wrap;
    gap: 12px;
}
.products-count {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}
.products-sort select {
    padding: 8px 32px 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    background: var(--color-bg);
    color: var(--color-text);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%236e6e73'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
}
.products-sidebar {
    display: none; /* Simplified — filters via top toolbar */
}
.products-main {
    /* Takes full width in simplified layout */
}

/* ============================================================
   Product Detail Page
   ============================================================ */
.product-detail {
    padding: 48px 0;
}
.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    margin-bottom: 56px;
}
.product-gallery {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 1 / 1;
}
.product-gallery img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.product-info h1 {
    font-size: 1.8rem;
    margin-bottom: 8px;
}
.product-meta {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    flex-wrap: wrap;
}
.product-info-price {
    margin-bottom: 24px;
    padding: 16px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
}
.product-info-price .label {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-bottom: 4px;
}
.product-description {
    margin-bottom: 24px;
    line-height: 1.7;
    color: var(--color-text-secondary);
}
.product-specs {
    margin-bottom: 24px;
}
.spec-table {
    width: 100%;
    border-collapse: collapse;
}
.spec-table tr {
    border-bottom: 1px solid var(--color-border-light);
}
.spec-table td {
    padding: 10px 12px;
    font-size: 0.9rem;
}
.spec-table td:first-child {
    color: var(--color-text-secondary);
    width: 160px;
}
.spec-table td:last-child {
    font-weight: 500;
}
.product-certifications {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}
.cert-badge {
    padding: 6px 14px;
    background: var(--color-success-bg);
    color: var(--color-success);
    border-radius: var(--radius-xl);
    font-size: 0.8rem;
    font-weight: 600;
}

/* Inquiry Form */
.inquiry-section {
    padding: 48px 0;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-xl);
    margin-bottom: 56px;
}
.inquiry-section .container {
    max-width: 680px;
    margin: 0 auto;
}
.inquiry-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.inquiry-form .full-width {
    grid-column: 1 / -1;
}
.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.form-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text);
}
.form-group label .required {
    color: var(--color-error);
}
.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    outline: none;
    transition: border-color var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-soft);
}
.form-group textarea {
    resize: vertical;
    min-height: 100px;
}
.form-submit {
    grid-column: 1 / -1;
    text-align: center;
}
.form-submit button {
    padding: 14px 48px;
    background: var(--color-accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}
.form-submit button:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.form-message {
    grid-column: 1 / -1;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    display: none;
}
.form-message.success {
    display: block;
    background: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid var(--color-success);
}
.form-message.error {
    display: block;
    background: var(--color-error-bg);
    color: var(--color-error);
    border: 1px solid var(--color-error);
}

/* ============================================================
   About Page
   ============================================================ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    margin-bottom: 56px;
}
.about-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4 / 3;
    background: var(--color-bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: var(--color-text-tertiary);
}
.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.about-text h2 {
    margin-bottom: 16px;
}
.about-text p {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 32px;
}
.stat-card {
    text-align: center;
    padding: 24px 12px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
}
.stat-number {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 4px;
}
.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

/* ============================================================
   Contact Page
   ============================================================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 48px;
    align-items: start;
}
.contact-info h2 {
    margin-bottom: 16px;
}
.contact-info p {
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}
.contact-detail {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}
.contact-detail .icon {
    font-size: 1.3rem;
    color: var(--color-accent);
    flex-shrink: 0;
    margin-top: 2px;
}
.contact-detail .info h4 {
    font-size: 0.9rem;
    margin-bottom: 2px;
}
.contact-detail .info span {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

/* ============================================================
   Blog Page
   ============================================================ */
.blog-featured {
    margin-bottom: 40px;
}

/* ============================================================
   FAQ
   ============================================================ */
.faq-list {
    max-width: 720px;
    margin: 0 auto;
}
.faq-item {
    border-bottom: 1px solid var(--color-border-light);
    padding: 20px 0;
}
.faq-question {
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-text);
}
.faq-question:hover {
    color: var(--color-accent);
}
.faq-answer {
    margin-top: 12px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    display: none;
}
.faq-item.active .faq-answer {
    display: block;
}

/* ============================================================
   Pagination
   ============================================================ */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}
.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition);
}
.pagination a:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}
.pagination .active {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

/* ============================================================
   Back to Top
   ============================================================ */
.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-accent);
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    box-shadow: var(--shadow-md);
    z-index: 99;
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}
.back-to-top:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
}

/* ============================================================
   Responsive
   ============================================================ */

/* Tablet */
@media (max-width: 1024px) {
    .hero-slider { height: 420px; }
    .hero-content h1 { font-size: 2rem; }
    .product-grid,
    .product-tab-content.active { grid-template-columns: repeat(3, 1fr); }
    .category-grid { grid-template-columns: repeat(4, 1fr); }
    .tech-grid { grid-template-columns: repeat(2, 1fr); }
    .testimonial-grid { grid-template-columns: repeat(2, 1fr); }
    .trust-grid { grid-template-columns: repeat(4, 1fr); }
    .blog-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .product-detail-grid { grid-template-columns: 1fr; }
    .about-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Mobile */
@media (max-width: 768px) {
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }
    .section { padding: 48px 0; }
    .container { padding: 0 16px; }
    
    /* Header */
    .main-nav { display: none; }
    .menu-toggle { display: flex; }
    .header-actions .btn-inquiry { display: none; }
    
    /* Top bar */
    .topbar-inner { gap: 16px; }
    
    /* Hero */
    .hero-slider { height: auto; min-height: 360px; }
    .hero-slide-inner { grid-template-columns: 1fr; text-align: center; }
    .hero-image { display: none; }
    .hero-content h1 { font-size: 1.6rem; }
    .hero-content p { margin-left: auto; margin-right: auto; }
    .hero-buttons { justify-content: center; }
    
    /* Products */
    .product-grid,
    .product-tab-content.active { grid-template-columns: repeat(2, 1fr); }
    
    /* Categories */
    .category-grid { grid-template-columns: repeat(3, 1fr); }
    
    /* Tech */
    .tech-grid { grid-template-columns: 1fr; }
    
    /* Trust */
    .trust-grid { grid-template-columns: repeat(2, 1fr); }
    
    /* Newsletter */
    .newsletter { padding: 32px 20px; }
    .newsletter-form { flex-direction: column; }
    
    /* Footer */
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; text-align: center; }
    
    /* Product detail */
    .product-detail-grid { gap: 24px; }
    .inquiry-form { grid-template-columns: 1fr; }
    
    /* Stats */
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    
    /* Blog */
    .blog-grid { grid-template-columns: 1fr; }
}

/* Small Mobile */
@media (max-width: 480px) {
    .product-grid,
    .product-tab-content.active { grid-template-columns: 1fr 1fr; gap: 12px; }
    .category-grid { grid-template-columns: repeat(2, 1fr); }
    .testimonial-grid { grid-template-columns: 1fr; }
    .trust-grid { grid-template-columns: 1fr 1fr; }
    .hero-content h1 { font-size: 1.4rem; }
}