/* =============================================
   LIFTGEAR — B2B Aerial Work Platform Manufacturer
   Industrial Design System · v3
   ============================================= */

/* --- CSS Variables --- */
:root {
    --c-navy: #0d1f35;
    --c-navy-light: #132d4d;
    --c-blue: #1a56db;
    --c-orange: #f97316;
    --c-orange-hover: #ea580c;
    --c-orange-light: #fff7ed;
    --c-white: #fff;
    --c-gray-50: #f9fafb;
    --c-gray-100: #f3f4f6;
    --c-gray-200: #e5e7eb;
    --c-gray-300: #d1d5db;
    --c-gray-400: #9ca3af;
    --c-gray-500: #6b7280;
    --c-gray-600: #4b5563;
    --c-gray-700: #374151;
    --c-gray-800: #1f2937;
    --c-gray-900: #111827;
    --font: 'Inter', system-ui, -apple-system, sans-serif;
    --max-w: 1280px;
    --header-h: 68px;
    --radius: 8px;
    --radius-sm: 5px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.06);
    --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,.1);
    --shadow-lg: 0 12px 40px rgba(0,0,0,.14);
    --shadow-xl: 0 20px 60px rgba(0,0,0,.18);
    --transition: 0.2s cubic-bezier(.4,0,.2,1);
    --transition-slow: 0.35s cubic-bezier(.4,0,.2,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 20px); }
body {
    font-family: var(--font); font-size: 15px; line-height: 1.6;
    color: var(--c-gray-700); background: var(--c-white);
    -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; font: inherit; border: none; background: none; }
input, textarea, select { font: inherit; }

h1,h2,h3,h4 { font-weight: 700; color: var(--c-gray-900); line-height: 1.2; }
h1 { font-size: clamp(2rem, 3.5vw, 3rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 2.5vw, 2rem); letter-spacing: -0.01em; }
h3 { font-size: 1.125rem; }
h4 { font-size: .95rem; }

/* --- Section Title Accent --- */
.section-title {
    text-align: center; margin-bottom: 48px;
}
.section-title h2 { margin-bottom: 8px; }
.section-title p { color: var(--c-gray-500); max-width: 600px; margin: 0 auto; font-size: .92rem; }

/* --- Layout --- */
.container { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-gray { background: var(--c-gray-50); }
.section-narrow { padding: 56px 0; }

/* --- Header --- */
.site-header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    height: var(--header-h); background: rgba(255,255,255,.94);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}
.site-header.scrolled {
    border-bottom-color: var(--c-gray-200);
    box-shadow: 0 1px 3px rgba(0,0,0,.06);
    background: rgba(255,255,255,.98);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.header-logo { display: flex; align-items: center; flex-shrink: 0; }
.header-logo img { height: 38px; width: auto; }
.header-nav { display: flex; align-items: center; gap: 4px; }
.header-nav a {
    font-size: .88rem; font-weight: 600; color: var(--c-gray-600);
    padding: 8px 14px; border-radius: var(--radius-sm);
    transition: color var(--transition), background var(--transition);
}
.header-nav a:hover { color: var(--c-navy); background: var(--c-gray-50); }
.header-nav a.active { color: var(--c-navy); background: var(--c-gray-100); }
.header-cta {
    background: var(--c-orange); color: #fff !important; padding: 9px 20px;
    border-radius: var(--radius-sm); font-weight: 700; font-size: .84rem;
    margin-left: 8px; transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.header-cta:hover {
    background: var(--c-orange-hover); color: #fff !important;
    transform: translateY(-1px); box-shadow: 0 4px 12px rgba(249,115,22,.3);
}
.header-menu-btn {
    display: none; width: 40px; height: 40px; flex-direction: column;
    justify-content: center; gap: 5px; padding: 8px;
}
.header-menu-btn span {
    display: block; height: 2px; background: var(--c-navy); border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}

/* --- Hero --- */
.hero {
    position: relative; min-height: 90vh; display: flex; align-items: center;
    background: #132d4d; overflow: hidden;
}
.hero::before {
    content: ''; position: absolute; inset: 0;
    background:
        radial-gradient(ellipse 800px 500px at 75% 35%, rgba(249,115,22,.08), transparent),
        radial-gradient(ellipse 500px 400px at 25% 60%, rgba(26,86,219,.12), transparent),
        radial-gradient(ellipse 300px 300px at 60% 80%, rgba(249,115,22,.04), transparent);
    animation: heroGlow 8s ease-in-out infinite alternate;
}
@keyframes heroGlow {
    0% { opacity: .8; }
    100% { opacity: 1; }
}
.hero-bg-grid {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
    background-size: 60px 60px;
}
.hero .container { position: relative; z-index: 1; padding-top: calc(var(--header-h) + 48px); padding-bottom: 72px; }
.hero-content { max-width: 660px; }
.hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 6px 16px; background: rgba(249,115,22,.12);
    border: 1px solid rgba(249,115,22,.2); border-radius: 100px;
    font-size: .82rem; font-weight: 600; color: var(--c-orange); margin-bottom: 28px;
    animation: fadeInUp .6s var(--transition-slow) both;
}
.hero-badge .dot { width: 7px; height: 7px; background: var(--c-orange); border-radius: 50%; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: .4; transform: scale(.85); } }
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}
.hero h1 { color: var(--c-white); font-size: clamp(2.4rem, 5vw, 4.2rem); line-height: 1.06; margin-bottom: 22px; animation: fadeInUp .6s var(--transition-slow) .1s both; }
.hero h1 .accent { color: var(--c-orange); display: block; }
.hero p { font-size: 1.08rem; color: var(--c-gray-400); line-height: 1.7; margin-bottom: 40px; max-width: 520px; animation: fadeInUp .6s var(--transition-slow) .2s both; }
.hero-buttons { display: flex; gap: 14px; flex-wrap: wrap; animation: fadeInUp .6s var(--transition-slow) .3s both; }
.hero-stats {
    display: grid; grid-template-columns: repeat(3,1fr); gap: 32px;
    margin-top: 64px; padding-top: 40px;
    border-top: 1px solid rgba(255,255,255,.08); max-width: 560px;
    animation: fadeInUp .6s var(--transition-slow) .4s both;
}
.hero-image {
    position: absolute; right: -40px; bottom: 0; top: var(--header-h);
    width: 48%; display: flex; align-items: center; justify-content: center;
    pointer-events: none; user-select: none;
    animation: fadeInUp .6s var(--transition-slow) .15s both;
}
.hero-image img {
    width: 100%; max-height: 90%; object-fit: contain;
    opacity: .92; filter: drop-shadow(0 20px 60px rgba(0,0,0,.35));
}
.hero-stat-value { font-size: 1.85rem; font-weight: 800; color: var(--c-white); line-height: 1; }
.hero-stat-value .u { color: var(--c-orange); }
.hero-stat-label { font-size: .8rem; color: var(--c-gray-500); margin-top: 6px; }

/* --- Buttons --- */
.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 12px 28px; font-size: .9rem; font-weight: 700;
    border-radius: var(--radius-sm); transition: all var(--transition);
    white-space: nowrap;
}
.btn-primary { background: var(--c-orange); color: #fff; box-shadow: 0 4px 14px rgba(249,115,22,.25); }
.btn-primary:hover { background: var(--c-orange-hover); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(249,115,22,.35); }
.btn-outline { background: transparent; color: var(--c-gray-700); border: 2px solid var(--c-gray-200); }
.btn-outline:hover { border-color: var(--c-navy); background: var(--c-gray-50); transform: translateY(-1px); }
.btn-white { background: var(--c-white); color: var(--c-navy); }
.btn-white:hover { background: var(--c-gray-100); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-sm { padding: 8px 18px; font-size: .82rem; }
.btn-lg { padding: 16px 36px; font-size: 1rem; }

/* --- Category Cards --- */
.cat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}
.cat-card {
    background: var(--c-white); border: 1px solid var(--c-gray-200);
    border-radius: var(--radius); overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    cursor: pointer; display: flex; flex-direction: column;
}
.cat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--c-gray-300);
}
.cat-card-img {
    width: 100%; height: 200px; object-fit: contain;
    background: var(--c-gray-50); padding: 24px;
}
.cat-card-img.placeholder {
    display: flex; align-items: center; justify-content: center;
    font-size: 3.5rem; color: var(--c-gray-300); user-select: none;
}
.cat-card-body { padding: 20px 22px 22px; flex: 1; display: flex; flex-direction: column; }
.cat-card-body h3 { font-size: 1.05rem; margin-bottom: 6px; color: var(--c-gray-900); }
.cat-card-body p { font-size: .85rem; color: var(--c-gray-500); line-height: 1.55; margin-bottom: 14px; flex: 1; }
.cat-card-link {
    font-size: .82rem; font-weight: 700; color: var(--c-orange);
    display: inline-flex; align-items: center; gap: 4px;
    transition: gap var(--transition);
}
.cat-card:hover .cat-card-link { gap: 8px; }

/* --- Product Spec Card Grid --- */
.prod-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}
.prod-card {
    background: var(--c-white); border: 1px solid var(--c-gray-200);
    border-radius: var(--radius); overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    cursor: pointer; display: flex; flex-direction: column;
}
.prod-card:hover {
    transform: translateY(-3px); box-shadow: var(--shadow-md);
    border-color: var(--c-gray-300);
}
.prod-card-img {
    width: 100%; height: 180px; object-fit: contain;
    background: var(--c-gray-50); padding: 16px;
}
.prod-card-img.placeholder {
    display: flex; align-items: center; justify-content: center;
    font-size: 2.5rem; color: var(--c-gray-300); user-select: none;
}
.prod-card-body { padding: 14px 18px 18px; flex: 1; display: flex; flex-direction: column; }
.prod-card-body h4 { font-size: .95rem; color: var(--c-navy); margin-bottom: 12px; }
.prod-specs { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 12px; }
.prod-spec-item { font-size: .78rem; }
.prod-spec-item .val { font-weight: 700; color: var(--c-gray-800); }
.prod-spec-item .lbl { color: var(--c-gray-400); font-size: .72rem; display: block; margin-bottom: 1px; }

/* --- Page Header --- */
.page-header {
    background: var(--c-navy);
    padding: calc(var(--header-h) + 52px) 0 44px;
    text-align: center; position: relative; overflow: hidden;
}
.page-header::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(ellipse 600px 300px at 50% 90%, rgba(249,115,22,.05), transparent),
                radial-gradient(ellipse 400px 200px at 20% 50%, rgba(26,86,219,.08), transparent);
}
.page-header h1 { color: var(--c-white); position: relative; }
.page-header p { position: relative; }
.breadcrumb {
    display: flex; align-items: center; justify-content: center; gap: 8px;
    font-size: .84rem; color: var(--c-gray-400); margin-bottom: 14px; position: relative;
    flex-wrap: wrap;
}
.breadcrumb a { color: var(--c-orange); font-weight: 500; transition: color var(--transition); }
.breadcrumb a:hover { color: #fb923c; }
.breadcrumb .sep { color: var(--c-gray-600); font-size: .75rem; }

/* --- Compact Spec Table --- */
.spec-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: var(--radius); border: 1px solid var(--c-gray-200); }
.spec-table { width: 100%; border-collapse: collapse; font-size: .82rem; }
.spec-table thead { z-index: 10; }
.spec-table thead th {
    text-align: center; padding: 11px 10px; font-size: .74rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: .06em;
    background: var(--c-navy); color: var(--c-white);
    border-right: 1px solid rgba(255,255,255,.08);
    white-space: nowrap;
}
.spec-table thead th:first-child { border-radius: var(--radius) 0 0 0; }
.spec-table thead th:last-child { border-right: none; border-radius: 0 var(--radius) 0 0; }
.spec-table tbody td {
    padding: 8px 10px; text-align: center;
    border-bottom: 1px solid var(--c-gray-100);
    font-size: .8rem; vertical-align: middle;
}
.spec-table tbody tr:last-child td { border-bottom: none; }
.spec-table tbody td:first-child {
    text-align: left; font-weight: 600; color: var(--c-gray-700);
    background: var(--c-gray-50); white-space: nowrap;
}
.spec-table tbody tr:hover td { background: var(--c-orange-light); }
.spec-table tbody tr:hover td:first-child { background: var(--c-gray-100); }
.spec-table .row-header td {
    font-weight: 700; color: var(--c-navy); background: var(--c-gray-100) !important;
    font-size: .76rem; text-transform: uppercase; letter-spacing: .05em;
    padding: 10px;
}
.spec-table .row-header td:first-child {
    background: var(--c-navy-light) !important; color: var(--c-orange);
}

@media (max-width: 768px) {
    .spec-table { min-width: 600px; }
    .spec-table thead th, .spec-table tbody td { padding: 7px 6px; font-size: .73rem; }
    .spec-table thead { top: 60px; }
}

/* --- Product Highlights Cards --- */
.highlights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px; margin-top: 20px;
}
.highlight-card {
    padding: 20px 22px; background: var(--c-white);
    border-radius: var(--radius); border: 1px solid var(--c-gray-200);
    transition: transform var(--transition), box-shadow var(--transition);
}
.highlight-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.highlight-card h4 { margin-bottom: 8px; color: var(--c-navy); font-size: .95rem; }
.highlight-card p { font-size: .84rem; color: var(--c-gray-500); line-height: 1.6; }

/* --- Config / Standard+Optional Columns --- */
.config-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 16px;
}
.config-box {
    padding: 18px 20px; background: var(--c-white);
    border-radius: var(--radius); border: 1px solid var(--c-gray-200);
}
.config-box strong { display: block; margin-bottom: 8px; font-size: .88rem; color: var(--c-navy); }
.config-box p { font-size: .82rem; color: var(--c-gray-500); line-height: 1.7; }
@media (max-width: 768px) { .config-grid { grid-template-columns: 1fr; } }

/* --- Detail Page --- */
.detail-hero {
    display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: start;
}
.detail-gallery img {
    width: 100%; max-height: 400px; object-fit: contain;
    background: var(--c-gray-50); border-radius: var(--radius);
    border: 1px solid var(--c-gray-100);
}
.detail-gallery .thumbs { display: flex; gap: 8px; margin-top: 10px; }
.detail-gallery .thumbs img {
    width: 64px; height: 48px; object-fit: cover; border-radius: var(--radius-sm);
    cursor: pointer; border: 2px solid transparent; opacity: .6;
    transition: all var(--transition);
}
.detail-gallery .thumbs img.active, .detail-gallery .thumbs img:hover {
    border-color: var(--c-orange); opacity: 1;
}
.detail-info .tag {
    display: inline-block; padding: 4px 12px;
    background: var(--c-orange-light); color: var(--c-orange);
    font-size: .76rem; font-weight: 700; border-radius: 100px; margin-bottom: 10px;
}
.detail-info h2 { margin-bottom: 6px; }
.detail-info .model-code {
    font-size: .85rem; color: var(--c-gray-400); font-family: 'SF Mono', 'Fira Code', monospace; margin-bottom: 20px;
}
.detail-highlights {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px;
    margin-bottom: 24px; padding-bottom: 20px; border-bottom: 1px solid var(--c-gray-100);
}
.detail-highlights .highlight-item {
    text-align: center; padding: 14px 12px;
    background: var(--c-gray-50); border-radius: var(--radius-sm);
}
.detail-highlights .highlight-item .val { font-size: 1.35rem; font-weight: 800; color: var(--c-navy); }
.detail-highlights .highlight-item .lbl { font-size: .73rem; color: var(--c-gray-400); margin-top: 3px; }
.detail-desc { font-size: .9rem; line-height: 1.7; color: var(--c-gray-600); margin-bottom: 20px; }
.detail-features {
    display: grid; grid-template-columns: 1fr 1fr; gap: 6px 16px; margin-bottom: 24px;
}
.detail-features li {
    font-size: .82rem; color: var(--c-gray-600);
    display: flex; align-items: center; gap: 6px; padding: 3px 0;
}
.detail-features li::before { content: '✓'; color: var(--c-orange); font-weight: 700; flex-shrink: 0; }

/* --- Inquiry Form --- */
.inquiry-form {
    background: var(--c-navy); border-radius: var(--radius); padding: 30px;
    color: var(--c-white); box-shadow: var(--shadow-lg);
}
.inquiry-form h3 { color: var(--c-white); margin-bottom: 4px; font-size: 1.05rem; }
.inquiry-form .form-subtitle { font-size: .82rem; color: var(--c-gray-400); margin-bottom: 22px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group.full { grid-column: 1/-1; }
.form-group label { font-size: .76rem; font-weight: 600; color: var(--c-gray-300); }
.form-group label .req { color: var(--c-orange); }
.form-group input, .form-group select, .form-group textarea {
    padding: 11px 13px; background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.1); border-radius: var(--radius-sm);
    color: var(--c-white); font-size: .85rem;
    transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
}
.form-group input::placeholder, .form-group textarea::placeholder { color: rgba(255,255,255,.25); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none; border-color: var(--c-orange);
    background: rgba(255,255,255,.1);
    box-shadow: 0 0 0 3px rgba(249,115,22,.15);
}
.form-group select option { background: var(--c-navy); color: #fff; }
.form-group textarea { resize: vertical; min-height: 80px; }
.form-submit {
    width: 100%; margin-top: 20px; padding: 13px;
    background: var(--c-orange); color: #fff; font-size: .9rem; font-weight: 700;
    border: none; border-radius: var(--radius-sm); cursor: pointer;
    transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.form-submit:hover {
    background: var(--c-orange-hover); transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(249,115,22,.3);
}

/* --- Trust Bar --- */
.trust-bar {
    background: var(--c-navy); padding: 28px 0;
    border-top: 1px solid rgba(255,255,255,.06);
    border-bottom: 1px solid rgba(255,255,255,.06);
}
.trust-items { display: flex; justify-content: center; gap: 56px; flex-wrap: wrap; }
.trust-item { display: flex; align-items: center; gap: 12px; color: var(--c-white); }
.trust-icon { font-size: 1.6rem; flex-shrink: 0; }
.trust-title { font-weight: 700; font-size: .86rem; margin-bottom: 1px; }
.trust-desc { font-size: .76rem; color: var(--c-gray-400); }

/* --- Why Us Grid --- */
.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}
.why-card {
    padding: 26px 24px; background: var(--c-white);
    border-radius: var(--radius); border: 1px solid var(--c-gray-200);
    transition: transform var(--transition), box-shadow var(--transition);
}
.why-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.why-card .why-icon { font-size: 2rem; margin-bottom: 14px; }
.why-card h4 { margin-bottom: 8px; color: var(--c-navy); }
.why-card p { font-size: .85rem; color: var(--c-gray-500); line-height: 1.6; }

/* --- CTA Banner --- */
.cta-banner {
    background: linear-gradient(135deg, var(--c-orange) 0%, #ea580c 100%);
    padding: 56px 0; text-align: center; position: relative; overflow: hidden;
}
.cta-banner::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(circle at 30% 50%, rgba(255,255,255,.08) 0%, transparent 60%);
}
.cta-banner .container { position: relative; z-index: 1; }
.cta-banner h2 { color: var(--c-white); margin-bottom: 10px; font-size: clamp(1.4rem, 2.5vw, 1.9rem); }
.cta-banner p { color: rgba(255,255,255,.92); margin-bottom: 24px; font-size: 1rem; }
.cta-banner .btn {
    background: var(--c-white); color: var(--c-orange); font-size: .92rem;
    padding: 14px 32px;
}
.cta-banner .btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,.2); }

/* --- Footer --- */
.site-footer { background: var(--c-gray-900); color: var(--c-gray-400); padding: 56px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand img { height: 32px; margin-bottom: 14px; }
.footer-brand p { font-size: .85rem; line-height: 1.7; max-width: 300px; }
.footer-col h4 {
    color: var(--c-white); font-size: .8rem; text-transform: uppercase;
    letter-spacing: .06em; margin-bottom: 18px;
}
.footer-col li { margin-bottom: 9px; }
.footer-col a { font-size: .85rem; transition: color var(--transition); }
.footer-col a:hover { color: var(--c-orange); }
.footer-bottom {
    padding-top: 22px; border-top: 1px solid rgba(255,255,255,.06);
    display: flex; justify-content: space-between; font-size: .8rem; color: var(--c-gray-600);
}

/* --- Contact Info List --- */
.contact-list { display: flex; flex-direction: column; gap: 18px; margin-top: 28px; }
.contact-item { display: flex; align-items: center; gap: 12px; font-size: .9rem; }
.contact-item .contact-icon { font-size: 1.3rem; flex-shrink: 0; }
.contact-item strong { color: var(--c-gray-800); }

/* --- Section Divider --- */
.section-divider { border: none; border-top: 1px solid var(--c-gray-100); margin: 0; }

/* --- Scroll Reveal --- */
.reveal {
    opacity: 0; transform: translateY(20px);
    transition: opacity .6s var(--transition-slow), transform .6s var(--transition-slow);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* --- Back to Top --- */
.back-to-top {
    position: fixed; bottom: 24px; right: 24px; z-index: 90;
    width: 44px; height: 44px; background: var(--c-navy); color: var(--c-white);
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem; box-shadow: var(--shadow-md);
    opacity: 0; pointer-events: none; transform: translateY(12px);
    transition: opacity var(--transition), transform var(--transition), background var(--transition);
}
.back-to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top:hover { background: var(--c-orange); }

/* --- Responsive --- */
@media (max-width: 1024px) {
    .detail-hero { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    :root { --header-h: 60px; }
    .container { padding: 0 18px; }
    .section { padding: 52px 0; }
    .section-title { margin-bottom: 32px; }

    /* Mobile nav */
    .header-nav {
        display: none; position: fixed; top: var(--header-h); left: 0; right: 0;
        background: var(--c-white); padding: 12px 20px;
        border-bottom: 1px solid var(--c-gray-200);
        box-shadow: var(--shadow-lg); z-index: 99; flex-direction: column; gap: 0;
        max-height: calc(100vh - var(--header-h)); overflow-y: auto;
    }
    .header-nav.open { display: flex; }
    .header-nav a { padding: 12px 4px; font-size: .95rem; border-bottom: 1px solid var(--c-gray-100); border-radius: 0; }
    .header-nav a:last-child { border-bottom: none; }
    .header-cta { margin-left: 0; margin-top: 4px; text-align: center; }
    .header-menu-btn { display: flex; }

    /* Hero */
    .hero { min-height: auto; }
    .hero .container { padding-top: calc(var(--header-h) + 32px); padding-bottom: 48px; }
    .hero-image { display: none; }
    .hero h1 { font-size: 1.9rem; }
    .hero p { font-size: .95rem; }
    .hero-stats { grid-template-columns: repeat(3,1fr); gap: 18px; margin-top: 40px; padding-top: 28px; }
    .hero-stat-value { font-size: 1.4rem; }
    .hero-buttons { flex-direction: column; }
    .hero-buttons .btn { justify-content: center; }

    /* Cards */
    .cat-grid { grid-template-columns: 1fr; }
    .cat-card-img { height: 160px; }
    .prod-grid { grid-template-columns: 1fr; }

    /* Detail */
    .detail-hero { gap: 24px; }
    .detail-highlights { grid-template-columns: 1fr 1fr; }
    .detail-features { grid-template-columns: 1fr; }

    /* Form */
    .form-grid { grid-template-columns: 1fr; }

    /* Trust bar */
    .trust-items { gap: 20px; }
    .trust-item { flex: 1 1 120px; justify-content: center; }

    /* Why grid */
    .why-grid { grid-template-columns: 1fr; }

    /* Footer */
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }

    /* Spec table */

    /* Back to top */
    .back-to-top { bottom: 16px; right: 16px; width: 40px; height: 40px; font-size: 1rem; }
}

@media (max-width: 480px) {
    .hero-stats { grid-template-columns: 1fr; gap: 12px; text-align: center; }
    .hero-badge { font-size: .75rem; }
    .trust-items { flex-direction: column; align-items: flex-start; gap: 14px; }
    .page-header { padding: calc(var(--header-h) + 36px) 0 32px; }
    .cta-banner { padding: 40px 0; }
    .detail-highlights { grid-template-columns: 1fr; }
    .config-grid { grid-template-columns: 1fr; }
    .inquiry-form { padding: 20px; }
}