/* ============================================
   Dongsheng B2B — CSS
   ============================================ */

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

:root {
    --primary: #1a3a5c;
    --primary-light: #2c5f8a;
    --primary-dark: #0f2640;
    --accent: #c9a84c;
    --accent-light: #e0cc82;
    --accent-dark: #a07d2e;
    --bg: #ffffff;
    --bg-alt: #f5f7fa;
    --bg-dark: #0f1923;
    --bg-card: #ffffff;
    --text: #1a2332;
    --text-light: #5a6a7e;
    --text-lighter: #8a96a6;
    --border: #e2e6ec;
    --radius: 8px;
    --radius-sm: 4px;
    --shadow: 0 2px 12px rgba(0,0,0,0.06);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-display: 'Inter', -apple-system, sans-serif;
    --font-body: 'Inter', -apple-system, sans-serif;
    --gold: #c9a84c;
    --gold-light: #e0cc82;
    --gold-dark: #a07d2e;
}

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
    font-family: var(--font-body);
    color: var(--text);
    line-height: 1.7;
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.text-center { text-align: center; }
.text-left { text-align: left !important; }
.mt-40 { margin-top: 40px; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.2; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-decoration: none;
    letter-spacing: 0.3px;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(26,58,92,0.3);
}
.btn-outline {
    background: transparent;
    color: #fff;
    border-color: rgba(255,255,255,0.4);
}
.btn-outline:hover {
    background: #fff;
    color: var(--primary);
    border-color: #fff;
}
.btn-full { width: 100%; justify-content: center; }

/* ---------- Header ---------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}
.header.scrolled {
    box-shadow: 0 1px 12px rgba(0,0,0,0.08);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}
.logo-icon { font-size: 1.8rem; }
.logo-img { height: 36px; width: auto; object-fit: contain; }

.nav {
    display: flex;
    align-items: center;
    gap: 4px;
}
.nav-link {
    padding: 8px 16px;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-light);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}
.nav-link:hover, .nav-link.active {
    color: var(--primary);
    background: var(--bg-alt);
}
.nav-link.cta-nav {
    background: var(--primary);
    color: #fff;
    margin-left: 8px;
    font-weight: 600;
}
.nav-link.cta-nav:hover {
    background: var(--primary-dark);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ---------- Hero ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #0f1923 0%, #1a3a5c 50%, #0f2640 100%);
    background-image: url('https://images.unsplash.com/photo-1445205170230-053b83016050?w=1920&q=80');
    background-size: cover;
    background-position: center;
    overflow: hidden;
    padding: 120px 0 80px;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(135deg, rgba(15,25,35,0.92) 0%, rgba(26,58,92,0.85) 50%, rgba(15,38,64,0.92) 100%);
}
.hero-content {
    position: relative;
    z-index: 1;
    color: #fff;
    max-width: 800px;
}
.hero-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    margin-bottom: 24px;
    backdrop-filter: blur(4px);
}
.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.15;
}
.highlight {
    color: var(--accent-light);
    -webkit-text-fill-color: var(--accent-light);
}
.hero-desc {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.75);
    margin-bottom: 36px;
    line-height: 1.8;
    max-width: 600px;
}
.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
}
.stat {
    display: flex;
    flex-direction: column;
}
.stat-num {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-light);
}
.stat-label {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.5);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ---------- Sections ---------- */
.section {
    padding: 100px 0;
}
.section:nth-child(even) {
    background: var(--bg-alt);
}
.section-header {
    text-align: center;
    margin-bottom: 60px;
}
.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-dark);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 12px;
}
.section-title {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    color: var(--text);
    margin-bottom: 16px;
}
.section-desc {
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.05rem;
}

/* ---------- Category Grid (Homepage) ---------- */
.category-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.category-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    color: inherit;
    position: relative;
}
.category-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0,0,0,0.12);
}
.category-img {
    position: relative;
    height: 240px;
    overflow: hidden;
    flex-shrink: 0;
}
.category-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.category-card:hover .category-img img {
    transform: scale(1.1);
}
.category-img::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(to top, rgba(0,0,0,0.45) 0%, transparent 100%);
    pointer-events: none;
    transition: opacity 0.4s ease;
}
.category-card:hover .category-img::after {
    opacity: 0.7;
}
.category-info {
    padding: 24px 24px 28px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}
.category-info h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
    transition: color var(--transition);
}
.category-card:hover .category-info h3 {
    color: var(--primary);
}
.category-info p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 12px;
    flex-grow: 1;
}
.category-count {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
    padding: 4px 12px;
    background: rgba(26,58,92,0.06);
    border-radius: 50px;
    align-self: flex-start;
}
.category-link {
    display: inline-flex;
    align-items: center;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--primary);
    transition: transform 0.3s ease, color 0.3s ease;
    align-self: flex-start;
}
.category-card:hover .category-link {
    transform: translateX(6px);
    color: var(--primary-dark);
}

@media (max-width: 1024px) {
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
}
@media (max-width: 600px) {
    .category-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .category-img {
        height: 200px;
    }
}

/* ---------- Product Filter ---------- */
.filter-bar {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
}
.filter-btn {
    padding: 8px 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: #fff;
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-light);
}
.filter-btn:hover, .filter-btn.active {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(26,58,92,0.04);
}

/* ---------- Product Grid ---------- */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}
.product-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}
.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}
.product-img {
    height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: #f5f5f5;
}
.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.product-card:hover .product-img img {
    transform: scale(1.08);
}
.product-emoji {
    font-size: 4rem;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.1));
}
.product-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 4px 12px;
    background: var(--primary);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.product-info {
    padding: 20px;
}
.product-info h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}
.product-info p {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 16px;
}
.product-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}
.moq {
    font-size: 0.8rem;
    color: var(--text-lighter);
    font-weight: 500;
}
.inquire-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    transition: var(--transition);
}
.inquire-link:hover { color: var(--primary-dark); }

/* ---------- About ---------- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: center;
}
.about-visual { position: relative; }
.about-img-box {
    border-radius: var(--radius);
    overflow: hidden;
    height: 400px;
}
.about-img-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.about-placeholder {
    background: linear-gradient(135deg, #1a1a1a, #2a2a2a);
    height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--primary-dark);
}
.factory-icon { font-size: 4rem; }
.about-placeholder p { font-weight: 600; font-size: 1.1rem; }
.about-placeholder small { color: var(--text-light); }

.about-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--primary);
    color: #fff;
    padding: 20px 24px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow-lg);
}
.badge-num {
    display: block;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
}
.badge-text {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.9;
}

.about-text p {
    color: var(--text-light);
    margin-bottom: 16px;
    font-size: 1.02rem;
}
.about-highlights {
    display: grid;
    gap: 20px;
    margin-top: 32px;
}
.highlight-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}
.highlight-icon { font-size: 1.4rem; flex-shrink: 0; margin-top: 2px; }
.highlight-item strong { display: block; margin-bottom: 4px; }
.highlight-item p { color: var(--text-light); font-size: 0.9rem; margin: 0; }

/* ---------- R&D Center ---------- */
.rd-center {
    background: var(--bg-card);
}
.rd-grid {
    grid-template-columns: 1.2fr 1fr;
}
.rd-badge {
    left: -20px;
    right: auto;
}

/* ---------- Office Environment ---------- */
.office-env {
    background: var(--bg-alt);
}
.office-badge .badge-num {
    font-size: 1.6rem;
}

/* ---------- Company Culture ---------- */
.company-culture {
    background: var(--bg-card);
}
.culture-badge .badge-num {
    font-size: 1.6rem;
}

/* ---------- Production Line ---------- */
.production-line {
    background: var(--bg-dark);
    color: #fff;
}
.production-line .section-tag { color: var(--accent-light); }
.production-line .section-title { color: #fff; }
.production-line .section-subtitle { color: rgba(255,255,255,0.7); }
.production-line .prod-step h4 { color: var(--accent-light); }
.production-line .prod-step p { color: rgba(255,255,255,0.6); }
.production-line .prod-step-arrow { color: rgba(255,255,255,0.3); }
.production-line .prod-stat-item {
    background: rgba(255,255,255,0.06);
    border-color: rgba(255,255,255,0.1);
}
.production-line .prod-stat-num { color: var(--accent-light); }
.production-line .prod-stat-label { color: rgba(255,255,255,0.6); }
.section-subtitle {
    max-width: 720px;
    margin: -8px auto 48px;
    color: var(--text-light);
    text-align: center;
    font-size: 1.05rem;
    line-height: 1.7;
}

/* Process steps flow */
.prod-process {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 8px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}
.prod-step {
    flex: 0 1 140px;
    text-align: center;
    padding: 16px 8px;
}
.prod-step-icon {
    font-size: 2rem;
    margin-bottom: 8px;
}
.prod-step h4 {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--primary);
}
.prod-step p {
    font-size: 0.75rem;
    color: var(--text-light);
    line-height: 1.4;
    margin: 0;
}
.prod-step-arrow {
    color: var(--primary-light);
    font-size: 1.5rem;
    margin-top: 24px;
    font-weight: 300;
}

/* Gallery Carousel */
.prod-gallery {
    position: relative;
    margin: 0 auto 24px;
    max-width: 100%;
    display: flex;
    align-items: center;
    gap: 12px;
}
.gallery-track-wrapper {
    overflow: hidden;
    border-radius: var(--radius);
    flex: 1;
}
.gallery-track {
    display: flex;
    transition: transform 0.4s ease;
}
.gallery-slide {
    min-width: calc(33.333% - 12px);
    margin: 0 6px;
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
}
.gallery-slide img {
    width: 100%;
    height: 240px;
    object-fit: cover;
    display: block;
    border-radius: var(--radius);
}
.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    color: #fff;
    padding: 24px 12px 10px;
    font-size: 0.8rem;
    text-align: center;
    font-weight: 500;
}
.gallery-btn {
    background: var(--primary);
    color: #fff;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 1.4rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition);
    line-height: 1;
}
.gallery-btn:hover {
    background: var(--primary-light);
    transform: scale(1.05);
}
.gallery-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
}
.gallery-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--text-light);
    opacity: 0.3;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}
.gallery-dot.active {
    background: var(--primary);
    opacity: 1;
}

/* Production Stats */
.prod-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}
.prod-stat-item {
    padding: 24px 16px;
    background: var(--bg-alt);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}
.prod-stat-num {
    display: block;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}
.prod-stat-label {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* ---------- Why Us / Advantages ---------- */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.advantage-card {
    background: #fff;
    padding: 36px 28px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}
.advantage-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.adv-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}
.advantage-card h3 {
    font-size: 1.1rem;
    margin-bottom: 12px;
}
.advantage-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ---------- Process / How It Works ---------- */
.process-steps {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}
.step {
    flex: 1;
    min-width: 200px;
    max-width: 260px;
    text-align: center;
    padding: 24px;
}
.step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 16px;
}
.step h3 {
    font-size: 1rem;
    margin-bottom: 10px;
}
.step p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.6;
}
.step-arrow {
    font-size: 1.5rem;
    color: var(--primary-light);
    margin-top: 40px;
    flex-shrink: 0;
}

/* ---------- Testimonials ---------- */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.testimonial-card {
    background: #fff;
    padding: 32px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.stars {
    color: #ffc107;
    font-size: 1.1rem;
    margin-bottom: 16px;
    letter-spacing: 2px;
}
.testimonial-card > p {
    color: var(--text-light);
    font-style: italic;
    line-height: 1.7;
    margin-bottom: 20px;
    font-size: 0.95rem;
}
.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}
.author-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
}
.testimonial-author strong { display: block; font-size: 0.9rem; }
.testimonial-author span { font-size: 0.8rem; color: var(--text-lighter); }

/* ---------- Contact ---------- */
.contact {
    background: var(--bg-dark) !important;
    color: #fff;
}
.contact .section-tag { color: var(--accent-light); }
.contact .section-title { color: #fff; }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: flex-start;
}
.contact-info > p {
    color: rgba(255,255,255,0.65);
    margin-bottom: 32px;
    line-height: 1.7;
}
.contact-details {
    display: grid;
    gap: 20px;
    margin-bottom: 32px;
}
.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}
.contact-icon { font-size: 1.5rem; flex-shrink: 0; }
.contact-item strong { display: block; margin-bottom: 2px; }
.contact-item p { color: rgba(255,255,255,0.6); font-size: 0.9rem; margin: 0; }

.social-links {
    display: flex;
    gap: 12px;
}
.social-link {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition);
}
.social-link:hover {
    background: var(--primary);
    transform: translateY(-2px);
}

/* ---------- Inquiry Form ---------- */
.contact-form-wrap {
    background: #fff;
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}
.inquiry-form h3 {
    color: var(--text);
    margin-bottom: 24px;
    font-size: 1.3rem;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 0.9rem;
    transition: var(--transition);
    background: var(--bg-alt);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(26,58,92,0.1);
}
.form-group textarea { resize: vertical; }

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}
.checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.88rem;
    color: var(--text-light);
    cursor: pointer;
}
.checkbox-label input { accent-color: var(--primary); }

.file-upload {
    border: 2px dashed var(--border);
    border-radius: var(--radius-sm);
    padding: 24px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    color: var(--text-lighter);
    font-size: 0.9rem;
}
.file-upload:hover {
    border-color: var(--primary);
    color: var(--primary);
}
.file-upload input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.form-note {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-lighter);
    margin-top: 12px;
}

/* ---------- Footer ---------- */
.footer {
    background: #0f1923;
    color: rgba(255,255,255,0.7);
    padding: 60px 0 24px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-brand .logo {
    color: #fff;
    margin-bottom: 16px;
}
.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.7;
    color: rgba(255,255,255,0.5);
}
.footer-links h4 {
    color: #fff;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.footer-links a {
    display: block;
    font-size: 0.88rem;
    color: rgba(255,255,255,0.5);
    padding: 4px 0;
    transition: var(--transition);
}
.footer-links a:hover { color: var(--primary-light); }

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.08);
    font-size: 0.85rem;
}
.footer-bottom-links {
    display: flex;
    gap: 24px;
}
.footer-bottom-links a {
    color: rgba(255,255,255,0.4);
    transition: var(--transition);
}
.footer-bottom-links a:hover { color: var(--primary-light); }

/* ---------- WhatsApp Float ---------- */
.whatsapp-float {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: #25d366;
    color: #fff;
    padding: 14px 24px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: 0 4px 20px rgba(37,211,102,0.4);
    transition: var(--transition);
    z-index: 999;
}
.whatsapp-float:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(37,211,102,0.5);
}

/* ---------- Back to Top ---------- */
.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 180px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--shadow);
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}
.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* ---------- Animations ---------- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Toast / Success Message ---------- */
.toast {
    position: fixed;
    top: 90px;
    right: 24px;
    background: #4caf50;
    color: #fff;
    padding: 16px 28px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 9999;
    transform: translateX(120%);
    transition: var(--transition);
}
.toast.show { transform: translateX(0); }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .about-grid,
    .contact-grid { grid-template-columns: 1fr; gap: 40px; }
    .advantages-grid { grid-template-columns: repeat(2, 1fr); }
    .testimonial-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .prod-stats { grid-template-columns: repeat(2, 1fr); }
    .gallery-slide { min-width: calc(50% - 12px); }
    .prod-step-arrow { display: none; }
    .prod-process { gap: 4px; }
    .prod-step { flex: 0 1 120px; }
}

@media (max-width: 768px) {
    .nav { 
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 16px 24px;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    }
    .nav.open { display: flex; }
    .hamburger { display: flex; }
    .hamburger.active span:nth-child(1) { transform: rotate(45deg) translateY(7px); }
    .hamburger.active span:nth-child(2) { opacity: 0; }
    .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translateY(-7px); }

    .hero { min-height: auto; padding: 120px 0 60px; }
    .hero-title { font-size: 2rem; }
    .hero-stats { gap: 24px; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { text-align: center; justify-content: center; }

    .advantages-grid,
    .testimonial-grid { grid-template-columns: 1fr; }

    .process-steps { flex-direction: column; align-items: center; }
    .step-arrow { transform: rotate(90deg); margin: 0; }

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

    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }

    .about-badge { position: static; display: inline-flex; flex-direction: column; margin-top: 16px; }
    .gallery-slide { min-width: calc(100% - 12px); }
    .gallery-slide img { height: 200px; }
    .prod-stats { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .prod-process { justify-content: center; }
    .prod-step { flex: 0 1 100px; padding: 8px 4px; }
    .prod-step-icon { font-size: 1.5rem; }
    .prod-step h4 { font-size: 0.78rem; }

    .whatsapp-float span { display: none; }
    .whatsapp-float { padding: 14px; font-size: 1.4rem; }
    .back-to-top { right: 80px; }
}

@media (max-width: 480px) {
    .product-grid { grid-template-columns: 1fr; }
    .contact-form-wrap { padding: 24px; }
    .hero-stats { flex-direction: column; gap: 16px; }
}