/* =============================================
   ZHENGHENG TECHNOLOGY — Shared Styles
   Pantone 3125C: #0085B0 | Black: #000
   Style: Hoverstat.es inspired minimal dark
   ============================================= */


/* ===== CSS Variables ===== */
:root {
    --brand: #0085B0;
    --brand-dark: #006A8E;
    --brand-light: #00A3D6;
    --brand-glow: rgba(0,133,176,0.15);
    --black: #000;
    --near-black: #0a0a0a;
    --dark: #1d1d1f;
    --text: #f5f5f7;
    --text-muted: rgba(255,255,255,0.5);
    --text-dim: rgba(255,255,255,0.25);
    --border: rgba(255,255,255,0.08);
    --card-bg: rgba(255,255,255,0.04);
    --font-cn: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', sans-serif;
    --font-en: 'Inter', 'SF Pro Display', -apple-system, sans-serif;
}

/* ===== Reset ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-cn);
    background: var(--black);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
.en { font-family: var(--font-en); }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ===== Section Backgrounds ===== */
.section-black { background: var(--black); }
.section-brand { background: var(--brand); }
.section-dark { background: var(--near-black); }

/* ===== Card backgrounds per section context ===== */
/* Cards on BLACK sections — subtle blue tint to stand out */
.section-black .product-card { background: rgba(0,133,176,0.04); }
.section-black .product-card:hover { background: rgba(0,133,176,0.10); }
.section-black .feature-grid-slim .cell { background: rgba(0,133,176,0.06); }
.section-black .about-visual { background: rgba(0,133,176,0.06); }
.section-black .cert-bar { background: rgba(0,133,176,0.04); }
.section-black .contact-card { background: rgba(0,133,176,0.06); }

/* Cards on BRAND (blue) sections — subtle dark overlay to stand out */
.section-brand .feature-card { background: rgba(0,0,0,0.10); border-color: rgba(255,255,255,0.10); }
.section-brand .feature-card:hover { background: rgba(0,0,0,0.15); border-color: rgba(255,255,255,0.20); }
.section-brand .stat-item { background: rgba(0,0,0,0.10); }
.section-brand .testimonial-card { background: rgba(0,0,0,0.10); border-color: rgba(255,255,255,0.10); }
.section-brand .spec-item-compact { background: rgba(0,0,0,0.08); border-color: rgba(255,255,255,0.08); }
.section-brand .product-hero-image { background: rgba(0,0,0,0.12); border-color: rgba(255,255,255,0.08); }
.section-brand .specs-table td { border-color: rgba(255,255,255,0.08); }
.section-brand .spec-item-masonry { background: rgba(0,0,0,0.08); }

/* ===== Navigation ===== */
.nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(0,0,0,0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}
.nav-inner {
    max-width: 1200px; margin: 0 auto; padding: 0 24px;
    height: 56px; display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
    display: flex; align-items: center; gap: 12px;
    font-weight: 600; font-size: 15px; color: var(--text); letter-spacing: 0.5px;
}
.nav-logo img { height: 30px; width: auto; }
.nav-links { display: flex; gap: 32px; }
.nav-links a {
    font-size: 13px; font-weight: 400;
    color: var(--text-muted); transition: color 0.3s; letter-spacing: 0.3px;
}
.nav-links a:hover, .nav-links a.active { color: var(--brand-light); }
.nav-contact {
    font-size: 13px; color: var(--brand-light); font-weight: 500; transition: opacity 0.3s;
}
.nav-contact:hover { opacity: 0.8; }
.nav-toggle { display: none; background: none; border: none; color: var(--text); font-size: 24px; cursor: pointer; }
.nav-back {
    display: flex; align-items: center; gap: 6px;
    font-size: 13px; color: var(--text-muted); transition: color 0.3s;
}
.nav-back:hover { color: var(--brand-light); }

/* ===== Section Shared ===== */
section { padding: 0; }
.section-pad { padding: 100px 24px; }
.section-inner {
    max-width: 1200px; margin: 0 auto; padding: 0 24px;
}
.section-label {
    font-size: 12px; font-weight: 600; letter-spacing: 3px;
    text-transform: uppercase; color: var(--brand-light); margin-bottom: 8px;
}
.section-label-en {
    font-family: var(--font-en);
    font-size: 11px; font-weight: 400;
    letter-spacing: 3px; text-transform: uppercase;
    color: var(--text-dim); margin-bottom: 4px;
}
.section-title {
    font-size: 42px; font-weight: 700; margin-bottom: 12px; letter-spacing: -0.5px;
}
.section-subtitle {
    font-size: 17px; color: var(--text-muted); max-width: 600px; line-height: 1.7;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 12px 28px; border-radius: 980px;
    font-size: 14px; font-weight: 500; border: none; cursor: pointer; transition: all 0.3s;
}
.btn-primary {
    background: var(--brand); color: #fff;
}
.btn-primary:hover { background: var(--brand-dark); transform: scale(1.02); }
.btn-outline {
    background: transparent; color: var(--text);
    border: 1px solid var(--border);
}
.btn-outline:hover { border-color: var(--brand-light); color: var(--brand-light); }
.btn-white {
    background: #fff; color: var(--black);
}
.btn-white:hover { opacity: 0.9; transform: scale(1.02); }
.btn-lg { padding: 14px 36px; font-size: 16px; }

/* ===== Hero ===== */
.hero {
    padding-top: 56px;
    min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    text-align: center;
    position: relative; overflow: hidden;
}
.hero-bg {
    position: absolute; inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 50% 40%, rgba(0,0,0,0.15) 0%, transparent 70%),
        radial-gradient(ellipse 60% 50% at 80% 80%, rgba(0,0,0,0.08) 0%, transparent 60%);
    pointer-events: none;
}
.hero-content { position: relative; z-index: 1; max-width: 960px; padding: 80px 24px 60px; }
.hero-badge {
    display: inline-block; padding: 6px 16px; border-radius: 20px;
    background: rgba(0,133,176,0.15); border: 1px solid rgba(0,133,176,0.3);
    font-size: 12px; font-weight: 500; letter-spacing: 1px; color: var(--brand-light); margin-bottom: 24px;
}
.hero-sub-en {
    font-family: var(--font-en);
    font-size: 16px; font-weight: 400;
    color: var(--text-dim);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 16px;
}
.hero h1 {
    font-size: 56px; font-weight: 700; line-height: 1.1; letter-spacing: -1px; margin-bottom: 16px;
}
.hero h1 .highlight {
    background: linear-gradient(135deg, var(--brand-light), #66d9ff);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero p {
    font-size: 18px; font-weight: 400; color: var(--text-muted);
    max-width: 600px; margin: 0 auto 36px; line-height: 1.7;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== Hero Product Image (Home) ===== */
.hero-product {
    margin-top: 48px;
    position: relative;
    max-width: 750px;
    margin-left: auto;
    margin-right: auto;
}
.hero-product-inner {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow:
        0 30px 80px rgba(0,0,0,0.35),
        0 0 0 1px rgba(255,255,255,0.05);
    transition: transform 0.5s ease, box-shadow 0.4s ease;
}
.hero-product-inner:hover {
    box-shadow:
        0 40px 100px rgba(0,0,0,0.45),
        0 0 0 1px rgba(255,255,255,0.10);
}
.hero-product-inner img {
    width: 100%;
    display: block;
}
.hero-product-glow {
    position: absolute;
    inset: -2px;
    border-radius: 22px;
    background: linear-gradient(135deg,
        rgba(0,133,176,0.25), rgba(0,163,214,0.08),
        rgba(0,133,176,0.15), transparent 60%);
    pointer-events: none;
    z-index: 0;
}
.hero-product-inner { position: relative; z-index: 1; }
.hero-product-shadow {
    position: absolute;
    bottom: -30px;
    left: 15%;
    right: 15%;
    height: 50px;
    background: radial-gradient(ellipse at center, rgba(0,0,0,0.2) 0%, transparent 70%);
    filter: blur(15px);
    pointer-events: none;
}
.hero-product-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 18px;
    padding: 6px 18px;
    border-radius: 980px;
    background: rgba(0,0,0,0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.06);
    font-size: 12px;
    color: rgba(255,255,255,0.5);
    letter-spacing: 0.5px;
}

/* ===== Product Hero (Detail Page) ===== */
.product-hero {
    padding-top: 56px;
    min-height: 100vh;
    display: flex; align-items: center;
    position: relative; overflow: hidden;
}
.product-hero-bg {
    position: absolute; inset: 0;
    background: radial-gradient(ellipse 70% 50% at 30% 50%, rgba(0,0,0,0.12) 0%, transparent 60%);
    pointer-events: none;
}
.product-hero-inner {
    max-width: 1200px; margin: 0 auto; padding: 80px 24px;
    display: grid; grid-template-columns: 1fr 1fr; gap: 60px;
    align-items: center;
    position: relative; z-index: 1;
}
.product-hero-image {
    border-radius: 24px;
    overflow: hidden;
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--border);
}
.product-hero-image .img-wrap {
    aspect-ratio: 4/3;
    display: flex; align-items: center; justify-content: center;
    padding: 24px;
}
.product-hero-image img {
    width: 100%; height: 100%; object-fit: contain;
}
.product-hero-info .breadcrumb {
    font-size: 12px; color: var(--text-dim); margin-bottom: 16px; letter-spacing: 1px;
    font-family: var(--font-en);
}
.product-hero-info .breadcrumb a { color: var(--brand-light); }
.product-hero-info .breadcrumb a:hover { text-decoration: underline; }
.product-hero-info h1 {
    font-size: 48px; font-weight: 700; line-height: 1.1; margin-bottom: 8px;
}
.product-hero-info .product-model {
    font-family: var(--font-en); font-size: 16px;
    color: var(--brand-light); font-weight: 500; margin-bottom: 20px;
    letter-spacing: 1px;
}
.product-hero-info .product-desc {
    font-size: 17px; color: var(--text-muted); line-height: 1.7; margin-bottom: 32px;
}
.product-hero-info .product-price-lg {
    font-size: 36px; font-weight: 700; margin-bottom: 24px;
}
.product-hero-info .product-price-lg small { font-size: 16px; font-weight: 400; color: var(--text-muted); }

/* ===== Product Specs Table (Detail) ===== */
.specs-table { width: 100%; border-collapse: collapse; margin: 32px 0; }
.specs-table tr { border-bottom: 1px solid var(--border); }
.specs-table tr:last-child { border-bottom: none; }
.specs-table td { padding: 14px 0; font-size: 14px; }
.specs-table td:first-child {
    font-weight: 500; color: var(--text-muted); width: 40%; vertical-align: top;
}
.specs-table td:last-child { color: var(--text); }

/* ===== Product Features Grid ===== */
.feature-grid-slim {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
}
.feature-grid-slim .cell {
    background: var(--near-black);
    padding: 32px 24px;
    text-align: center;
}
.feature-grid-slim .cell-icon { font-size: 32px; margin-bottom: 12px; }
.feature-grid-slim .cell h4 { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.feature-grid-slim .cell p { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* ===== Products Grid (Home) ===== */
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); border-radius: 20px; overflow: hidden; border: 1px solid var(--border); }
.product-card { background: var(--near-black); padding: 0; transition: all 0.4s; position: relative; }
.product-card:hover { background: rgba(0,133,176,0.06); }
.product-card a { display: block; padding: 36px 28px 32px; }
.product-card .card-img {
    aspect-ratio: 4/3;
    background: rgba(255,255,255,0.02);
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 20px;
    overflow: hidden;
}
.product-card .card-img img { width: 100%; height: 100%; object-fit: contain; }
.product-card .card-category { font-size: 11px; color: var(--brand-light); letter-spacing: 2px; text-transform: uppercase; font-weight: 600; margin-bottom: 6px; font-family: var(--font-en); }
.product-card h3 { font-size: 20px; font-weight: 600; margin-bottom: 8px; }
.product-card .card-desc { font-size: 14px; color: var(--text-muted); line-height: 1.6; margin-bottom: 14px; }
.product-card .card-specs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.product-card .card-specs span { font-size: 11px; padding: 3px 10px; border-radius: 6px; background: rgba(255,255,255,0.06); color: var(--text-muted); }
.product-card .card-arrow {
    font-size: 13px; color: var(--brand-light); font-weight: 500;
    display: flex; align-items: center; gap: 6px;
    transition: gap 0.3s;
}
.product-card:hover .card-arrow { gap: 12px; }

/* ===== Categories Grid (Home) ===== */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 1100px;
    margin: 0 auto;
}
.category-card {
    background: rgba(0,0,0,0.12);
    border-radius: 24px;
    padding: 40px 28px;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.08);
    transition: all 0.4s ease;
    cursor: pointer;
}
.category-card:hover {
    background: rgba(0,0,0,0.20);
    border-color: rgba(255,255,255,0.15);
    transform: translateY(-4px);
}
.category-card a { display: block; color: inherit; text-decoration: none; }
.category-icon {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    background: rgba(0,133,176,0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 36px;
    transition: background 0.3s;
}
.category-card:hover .category-icon { background: rgba(0,133,176,0.25); }
.category-card h3 { font-size: 20px; font-weight: 600; margin-bottom: 8px; }
.category-card .cat-count {
    font-family: var(--font-en);
    font-size: 12px;
    color: var(--brand-light);
    letter-spacing: 1px;
    margin-bottom: 10px;
}
.category-card p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }
.category-card .cat-arrow {
    margin-top: 16px;
    font-size: 13px;
    color: var(--brand-light);
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: gap 0.3s;
}
.category-card:hover .cat-arrow { gap: 12px; }

@media (max-width: 968px) {
    .categories-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 700px) {
    .categories-grid { grid-template-columns: 1fr; }
}

/* ===== Features Grid ===== */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; max-width: 1100px; }
.feature-card {
    background: rgba(255,255,255,0.04);
    border-radius: 20px; padding: 36px 28px;
    border: 1px solid var(--border);
    transition: all 0.3s;
}
.feature-card:hover { background: rgba(0,133,176,0.06); border-color: rgba(0,133,176,0.2); }
.feature-icon { font-size: 32px; margin-bottom: 16px; }
.feature-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

/* ===== Stats Grid ===== */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border); border-radius: 16px; overflow: hidden; border: 1px solid var(--border); }
.stat-item { background: var(--near-black); padding: 40px 20px; text-align: center; }
.stat-number { font-size: 42px; font-weight: 700; color: var(--brand-light); margin-bottom: 8px; }
.stat-item h4 { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.stat-item p { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* ===== About ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.company-name-cn { font-size: 22px; font-weight: 700; margin-bottom: 4px; }
.company-name-en { font-family: var(--font-en); font-size: 13px; font-weight: 400; color: var(--text-dim); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 24px; }
.info-list { }
.info-row { display: flex; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--border); }
.info-row:last-child { border-bottom: none; }
.info-icon { font-size: 18px; min-width: 28px; }
.info-row strong { font-size: 14px; font-weight: 600; display: block; margin-bottom: 2px; }
.info-row span { font-size: 14px; color: var(--text-muted); line-height: 1.5; }
.info-row .en-text { font-family: var(--font-en); font-size: 12px; color: var(--text-dim); display: block; margin-top: 2px; }

/* ===== Specs Detail ===== */
.specs-compact { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.spec-item-compact { background: rgba(255,255,255,0.04); border: 1px solid var(--border); border-radius: 12px; padding: 20px 24px; display: flex; gap: 14px; align-items: flex-start; }
.spec-dot { width: 8px; height: 8px; min-width: 8px; border-radius: 50%; background: var(--brand-light); margin-top: 6px; }
.spec-item-compact strong { font-size: 14px; font-weight: 600; display: block; margin-bottom: 2px; }
.spec-item-compact span { font-size: 13px; color: var(--text-muted); }

/* ===== Testimonials ===== */
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.testimonial-card { background: rgba(255,255,255,0.04); border: 1px solid var(--border); border-radius: 18px; padding: 32px; }
.testimonial-stars { color: #ff9f0a; font-size: 15px; margin-bottom: 12px; letter-spacing: 2px; }
.testimonial-card blockquote { font-size: 14px; color: var(--text); line-height: 1.7; margin-bottom: 16px; font-style: normal; }
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.testimonial-avatar { width: 38px; height: 38px; border-radius: 50%; background: linear-gradient(135deg, var(--brand), var(--brand-light)); display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 600; font-size: 15px; }
.testimonial-name { font-size: 14px; font-weight: 600; }
.testimonial-role { font-size: 12px; color: var(--text-dim); }

/* ===== CTA ===== */
.cta { text-align: center; padding: 120px 24px; }
.cta h2 { font-size: 44px; font-weight: 700; margin-bottom: 12px; }
.cta .cta-sub-en { font-family: var(--font-en); font-size: 13px; color: var(--text-dim); letter-spacing: 3px; text-transform: uppercase; margin-bottom: 16px; }
.cta p { font-size: 17px; color: var(--text-muted); max-width: 500px; margin: 0 auto 36px; }
.contact-card { text-align: left; background: rgba(255,255,255,0.04); border-radius: 16px; padding: 28px 32px; max-width: 520px; margin: 0 auto; border: 1px solid var(--border); }
.contact-row { display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; }
.contact-row .icon { font-size: 20px; min-width: 28px; }
.contact-row .label { font-size: 11px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 1px; font-weight: 500; }
.contact-row .val { font-size: 14px; color: var(--text); line-height: 1.4; }
.contact-row .val-en { font-family: var(--font-en); font-size: 12px; color: var(--text-dim); }

/* ===== Footer ===== */
footer { background: var(--dark); color: var(--text-muted); padding: 60px 24px 32px; }
.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .company-name { color: var(--text); font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.footer-brand .company-name-en { font-family: var(--font-en); font-size: 11px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 12px; }
.footer-brand p { font-size: 13px; line-height: 1.7; max-width: 320px; color: var(--text-muted); }
.footer-col h4 { color: var(--text); font-size: 12px; font-weight: 600; margin-bottom: 14px; letter-spacing: 1px; text-transform: uppercase; }
.footer-col a { display: block; font-size: 13px; padding: 4px 0; transition: color 0.3s; color: var(--text-muted); }
.footer-col a:hover { color: var(--text); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 24px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 12px; }

/* ===== Divider ===== */
.divider-brand { height: 4px; background: var(--brand); border: none; margin: 0; }

/* ===== Animations ===== */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }
.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }

/* ===== Image Placeholder (fallback) ===== */
.img-placeholder {
    width: 100%; height: 100%;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    color: var(--text-dim); font-size: 13px;
    border: 2px dashed rgba(255,255,255,0.1);
    border-radius: 12px;
    text-align: center;
    padding: 20px;
}
.img-placeholder small { font-size: 11px; color: rgba(255,255,255,0.12); margin-top: 4px; }

/* ===== Cert Bar ===== */
.cert-bar { display: flex; justify-content: center; align-items: center; gap: 40px; flex-wrap: wrap; max-width: 800px; margin: 0 auto; padding: 28px 32px; background: rgba(255,255,255,0.03); border-radius: 16px; border: 1px solid var(--border); }
.cert-item { text-align: center; }
.cert-item .label { font-size: 10px; text-transform: uppercase; letter-spacing: 2px; color: var(--text-dim); font-weight: 500; font-family: var(--font-en); }
.cert-item .value { font-size: 18px; font-weight: 700; color: var(--brand-light); margin-top: 4px; }

/* ===== Responsive ===== */
@media (max-width: 968px) {
    .hero h1 { font-size: 38px; }
    .section-title { font-size: 32px; }
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .testimonials-grid { grid-template-columns: 1fr; }
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .product-hero-inner { grid-template-columns: 1fr; gap: 40px; }
    .specs-compact { grid-template-columns: 1fr; }
    .feature-grid-slim { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 700px) {
    .nav-links, .nav-contact { display: none; }
    .nav-toggle { display: block; }
    .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 56px; left: 0; right: 0; background: rgba(0,0,0,0.98); padding: 16px 24px; gap: 16px; border-bottom: 1px solid var(--border); }
    .nav-links.open a { font-size: 16px; padding: 8px 0; }
    .hero h1 { font-size: 28px; }
    .hero p { font-size: 15px; }
    .section-title { font-size: 24px; }
    .products-grid { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .cta h2 { font-size: 28px; }
    .hero-content { padding: 60px 16px 40px; }
    .product-hero-info h1 { font-size: 32px; }
    .feature-grid-slim { grid-template-columns: 1fr; }
    .cert-bar { flex-direction: column; gap: 20px; }
}