/* ============================================
   KitchenPro - Commercial Kitchen Equipment Site
   工业风B2B外贸独立站样式
   ============================================ */

/* ---------- Reset & Base ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    color: #1a1a1a;
    line-height: 1.6;
    background: #fff;
    font-size: 15px;
}
a { color: inherit; text-decoration: none; transition: color 0.2s; }
a:hover { color: #f5a623; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 14px;
    text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.25s;
    text-decoration: none;
}
.btn-primary { background: #f5a623; color: #fff; border-color: #f5a623; }
.btn-primary:hover { background: #e09612; border-color: #e09612; color: #fff; transform: translateY(-2px); box-shadow: 0 4px 12px rgba(245,166,35,0.3); }
.btn-outline { background: transparent; color: #fff; border-color: #fff; }
.btn-outline:hover { background: #fff; color: #1a2332; }
.btn-dark { background: #1a2332; color: #fff; border-color: #1a2332; }
.btn-dark:hover { background: #2c3e50; color: #fff; }
.btn-white { background: #fff; color: #1a2332; border-color: #fff; }
.btn-white:hover { background: #f5a623; color: #fff; border-color: #f5a623; }
.btn-small { padding: 8px 18px; font-size: 13px; }
.btn-large { padding: 14px 36px; font-size: 15px; }
.btn-full { width: 100%; }

/* ---------- Top Bar ---------- */
.top-bar {
    background: #1a2332;
    color: #ccc;
    font-size: 13px;
    padding: 8px 0;
}
.top-bar-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.top-bar-left { display: flex; gap: 24px; flex-wrap: wrap; }
.top-bar a { color: #ccc; }
.top-bar a:hover { color: #f5a623; }

/* ---------- Header ---------- */
.main-header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.06);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner { display: flex; justify-content: space-between; align-items: center; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 800; color: #1a2332; }
.logo-icon { font-size: 28px; }
.logo-text { letter-spacing: -0.5px; }
.logo-text::after { content: ''; display: block; width: 100%; height: 3px; background: #f5a623; margin-top: -2px; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 600;
    color: #1a2332;
    border-radius: 4px;
    letter-spacing: 0.5px;
}
.main-nav a:hover { color: #f5a623; background: #fff8ed; }
.main-nav a.active { color: #f5a623; }
.nav-cta { background: #f5a623 !important; color: #fff !important; margin-left: 12px; }
.nav-cta:hover { background: #e09612 !important; color: #fff !important; }
.mobile-menu-btn { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: #1a2332; }

/* ---------- Page Banner ---------- */
.page-banner {
    background: linear-gradient(135deg, #1a2332 0%, #2c3e50 100%);
    color: #fff;
    padding: 50px 0;
    position: relative;
    overflow: hidden;
}
.page-banner::before {
    content: '';
    position: absolute;
    right: -50px;
    top: -50px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(245,166,35,0.15) 0%, transparent 70%);
    border-radius: 50%;
}
.page-banner h1 { font-size: 32px; font-weight: 700; margin-bottom: 8px; }
.breadcrumb { font-size: 14px; color: #aaa; }
.breadcrumb a { color: #f5a623; }

/* ---------- Hero ---------- */
.hero {
    position: relative;
    background: linear-gradient(135deg, #1a2332 0%, #2c3e50 50%, #1a2332 100%);
    color: #fff;
    padding: 80px 0 100px;
    overflow: hidden;
}
.hero-bg {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(245,166,35,0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(245,166,35,0.08) 0%, transparent 40%);
}
.hero-content { position: relative; z-index: 1; max-width: 800px; }
.hero-badge {
    display: inline-block;
    background: rgba(245,166,35,0.15);
    color: #f5a623;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
    border: 1px solid rgba(245,166,35,0.3);
}
.hero h1 { font-size: 44px; font-weight: 800; line-height: 1.2; margin-bottom: 16px; }
.hero-sub { font-size: 17px; color: #ccc; margin-bottom: 32px; line-height: 1.7; }
.hero-buttons { display: flex; gap: 16px; margin-bottom: 48px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 40px; flex-wrap: wrap; }
.stat-item { display: flex; flex-direction: column; }
.stat-num { font-size: 36px; font-weight: 800; color: #f5a623; line-height: 1; }
.stat-label { font-size: 13px; color: #aaa; margin-top: 4px; }

/* ---------- Intro Bar ---------- */
.intro-bar { background: #f8f9fa; padding: 40px 0; border-bottom: 1px solid #eee; }
.intro-inner { display: flex; justify-content: space-between; align-items: center; gap: 30px; flex-wrap: wrap; }
.intro-text { flex: 1; min-width: 300px; }
.intro-text h2 { font-size: 24px; color: #1a2332; margin-bottom: 8px; }
.intro-text p { color: #666; font-size: 15px; }

/* ---------- Sections ---------- */
.section { padding: 70px 0; }
.section-alt { background: #f8f9fa; }
.section-header { text-align: center; max-width: 650px; margin: 0 auto 48px; }
.section-tag {
    display: inline-block;
    color: #f5a623;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 10px;
}
.section-header h2 { font-size: 30px; color: #1a2332; margin-bottom: 12px; font-weight: 700; }
.section-header p { color: #666; font-size: 15px; }
.center-btn { text-align: center; margin-top: 36px; }

/* ---------- Scene Grid (应用场景) ---------- */
.scene-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.scene-card {
    background: #fff;
    border-radius: 12px;
    padding: 30px 24px;
    text-align: center;
    border: 1px solid #eee;
    transition: all 0.3s;
}
.scene-card:hover { transform: translateY(-6px); box-shadow: 0 12px 30px rgba(0,0,0,0.1); border-color: #f5a623; }
.scene-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    margin: 0 auto 16px;
}
.scene-card h3 { font-size: 17px; color: #1a2332; margin-bottom: 8px; }
.scene-card p { font-size: 13.5px; color: #666; margin-bottom: 14px; line-height: 1.6; }
.scene-link { color: #f5a623; font-weight: 600; font-size: 14px; }

/* ---------- Type Row (设备类型) ---------- */
.type-row { margin-bottom: 40px; }
.type-row:last-child { margin-bottom: 0; }
.type-row-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.type-row-header h3 { font-size: 20px; color: #1a2332; }
.type-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.type-card {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid #eee;
    transition: all 0.3s;
    text-align: center;
}
.type-card:hover { transform: translateY(-4px); box-shadow: 0 8px 20px rgba(0,0,0,0.08); }
.type-card-img {
    height: 120px;
    background: linear-gradient(135deg, #f8f9fa, #eef1f5);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
}
.type-card h4 { padding: 14px 10px; font-size: 14px; color: #1a2332; font-weight: 600; }

/* ---------- Product Grid ---------- */
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.product-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid #eee;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
}
.product-card:hover { transform: translateY(-6px); box-shadow: 0 12px 30px rgba(0,0,0,0.1); }
.product-img {
    position: relative;
    height: 200px;
    background: linear-gradient(135deg, #f8f9fa, #eef1f5);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.product-placeholder { font-size: 60px; opacity: 0.6; }
.product-placeholder-large { font-size: 100px; opacity: 0.5; }
.product-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: #e74c3c;
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 4px;
    letter-spacing: 1px;
}
.product-info { padding: 18px; flex: 1; display: flex; flex-direction: column; }
.product-cat {
    display: inline-block;
    font-size: 11px;
    color: #f5a623;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 6px;
}
.product-info h3 { font-size: 15px; color: #1a2332; margin-bottom: 4px; line-height: 1.4; }
.product-info h3 a { color: #1a2332; }
.product-info h3 a:hover { color: #f5a623; }
.product-model { font-size: 12px; color: #999; margin-bottom: 8px; }
.product-desc { font-size: 13px; color: #666; line-height: 1.5; margin-bottom: 14px; flex: 1; }
.product-footer { display: flex; justify-content: space-between; align-items: center; }
.product-price-label { font-size: 12px; color: #27ae60; font-weight: 600; }

/* ---------- Filter Bar ---------- */
.filter-bar {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}
.filter-cats { display: flex; gap: 8px; flex-wrap: wrap; }
.filter-btn {
    padding: 8px 18px;
    border: 1px solid #ddd;
    border-radius: 20px;
    font-size: 13px;
    color: #666;
    background: #fff;
    transition: all 0.2s;
}
.filter-btn:hover { border-color: #f5a623; color: #f5a623; }
.filter-btn.active { background: #f5a623; color: #fff; border-color: #f5a623; }
.filter-search { display: flex; }
.filter-search input {
    padding: 9px 14px;
    border: 1px solid #ddd;
    border-radius: 6px 0 0 6px;
    font-size: 14px;
    width: 220px;
    outline: none;
}
.filter-search input:focus { border-color: #f5a623; }
.filter-search button {
    padding: 9px 16px;
    border: 1px solid #f5a623;
    background: #f5a623;
    color: #fff;
    border-radius: 0 6px 6px 0;
    cursor: pointer;
    font-size: 14px;
}
.result-info { margin-bottom: 24px; color: #666; font-size: 14px; }
.empty-state { text-align: center; padding: 60px 20px; }
.empty-icon { font-size: 60px; margin-bottom: 16px; }
.empty-state h3 { font-size: 20px; color: #1a2332; margin-bottom: 8px; }
.empty-state p { color: #666; margin-bottom: 20px; }
.product-bottom-cta {
    text-align: center;
    background: #f8f9fa;
    border-radius: 12px;
    padding: 40px;
    margin-top: 50px;
}
.product-bottom-cta h3 { font-size: 22px; color: #1a2332; margin-bottom: 8px; }
.product-bottom-cta p { color: #666; margin-bottom: 20px; }

/* ---------- Product Detail ---------- */
.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; margin-bottom: 50px; }
.product-main-img {
    position: relative;
    height: 400px;
    background: linear-gradient(135deg, #f8f9fa, #eef1f5);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}
.product-thumbs { display: flex; gap: 10px; }
.thumb {
    width: 70px;
    height: 70px;
    background: #f8f9fa;
    border: 2px solid #eee;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    cursor: pointer;
    transition: all 0.2s;
}
.thumb:hover, .thumb.active { border-color: #f5a623; }
.product-detail-cat { margin-bottom: 8px; }
.product-detail-cat a { color: #f5a623; font-size: 13px; font-weight: 600; }
.product-detail-title { font-size: 28px; color: #1a2332; margin-bottom: 8px; line-height: 1.3; }
.product-detail-model { font-size: 15px; color: #666; margin-bottom: 16px; }
.product-detail-short { font-size: 15px; color: #555; line-height: 1.7; margin-bottom: 24px; }
.product-detail-price-box {
    background: #fff8ed;
    border: 1px solid #fde4b8;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 24px;
}
.price-label { font-size: 13px; color: #999; margin-bottom: 4px; }
.price-value { font-size: 24px; font-weight: 700; color: #f5a623; margin-bottom: 4px; }
.price-note { font-size: 12px; color: #999; }
.product-detail-actions { display: flex; flex-direction: column; gap: 12px; margin-bottom: 24px; }
.product-detail-highlights { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.highlight-item { font-size: 13px; color: #555; }

/* ---------- Tabs ---------- */
.product-tabs { border-top: 1px solid #eee; padding-top: 30px; margin-bottom: 50px; }
.tab-buttons { display: flex; gap: 4px; margin-bottom: 24px; border-bottom: 2px solid #eee; }
.tab-btn {
    padding: 12px 24px;
    background: none;
    border: none;
    font-size: 15px;
    font-weight: 600;
    color: #999;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.2s;
}
.tab-btn:hover { color: #f5a623; }
.tab-btn.active { color: #f5a623; border-bottom-color: #f5a623; }
.tab-content { display: none; }
.tab-content.active { display: block; }
.tab-content h3 { font-size: 20px; color: #1a2332; margin-bottom: 14px; }
.tab-content h4 { font-size: 16px; color: #1a2332; margin: 20px 0 10px; }
.tab-content p { color: #555; line-height: 1.8; margin-bottom: 12px; }
.feature-list { padding-left: 20px; }
.feature-list li { list-style: disc; color: #555; margin-bottom: 8px; }
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table th, .spec-table td { padding: 12px 16px; text-align: left; border-bottom: 1px solid #eee; }
.spec-table th { background: #f8f9fa; width: 200px; color: #1a2332; font-weight: 600; }
.spec-table td { color: #555; }
.shipping-info { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.shipping-col h4 { margin-bottom: 12px; color: #1a2332; }
.shipping-col ul { padding-left: 20px; }
.shipping-col li { list-style: disc; color: #555; margin-bottom: 8px; }
.related-products h2 { font-size: 24px; color: #1a2332; margin-bottom: 24px; }

/* ---------- Advantage Grid ---------- */
.advantage-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.advantage-card {
    background: #fff;
    border-radius: 12px;
    padding: 30px;
    border: 1px solid #eee;
    transition: all 0.3s;
}
.advantage-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,0.08); }
.advantage-icon { font-size: 36px; margin-bottom: 14px; }
.advantage-card h3 { font-size: 17px; color: #1a2332; margin-bottom: 8px; }
.advantage-card p { font-size: 14px; color: #666; line-height: 1.6; }

/* ---------- Language Bar ---------- */
.lang-bar { background: #1a2332; color: #fff; padding: 30px 0; text-align: center; }
.lang-bar p { font-size: 14px; color: #aaa; margin-bottom: 14px; }
.lang-tags { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.lang-tag {
    background: rgba(255,255,255,0.08);
    padding: 5px 14px;
    border-radius: 16px;
    font-size: 13px;
    color: #ccc;
}

/* ---------- CTA Section ---------- */
.cta-section {
    background: linear-gradient(135deg, #f5a623 0%, #e09612 100%);
    color: #fff;
    padding: 50px 0;
}
.cta-inner { display: flex; justify-content: space-between; align-items: center; gap: 30px; flex-wrap: wrap; }
.cta-text h2 { font-size: 26px; margin-bottom: 6px; }
.cta-text p { font-size: 15px; opacity: 0.9; }

/* ---------- Footer ---------- */
.main-footer { background: #1a2332; color: #aaa; padding-top: 50px; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; padding-bottom: 40px; }
.footer-col h3 { color: #fff; font-size: 20px; margin-bottom: 14px; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer-col p { font-size: 13.5px; line-height: 1.7; margin-bottom: 8px; }
.footer-desc { margin-top: 12px; color: #888; }
.footer-col ul li { margin-bottom: 10px; font-size: 13.5px; }
.footer-col ul li a { color: #aaa; }
.footer-col ul li a:hover { color: #f5a623; }
.contact-list li { display: flex; gap: 8px; align-items: flex-start; }
.footer-bottom { border-top: 1px solid #2c3e50; padding: 18px 0; font-size: 13px; color: #666; }

/* ---------- WhatsApp Float ---------- */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 56px;
    height: 56px;
    background: #25d366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    box-shadow: 0 4px 16px rgba(37,211,102,0.4);
    z-index: 999;
    transition: transform 0.2s;
}
.whatsapp-float:hover { transform: scale(1.1); }

/* ---------- About Page ---------- */
.about-intro { display: grid; grid-template-columns: 1.2fr 1fr; gap: 50px; align-items: center; margin-bottom: 60px; }
.about-intro-text h2 { font-size: 28px; color: #1a2332; margin: 10px 0 16px; line-height: 1.3; }
.about-intro-text p { color: #555; line-height: 1.8; margin-bottom: 14px; }
.about-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 28px; }
.about-stat { text-align: center; padding: 16px 8px; background: #f8f9fa; border-radius: 10px; }
.about-stat .stat-num { font-size: 28px; }
.about-stat .stat-label { font-size: 12px; }
.about-img-placeholder {
    height: 350px;
    background: linear-gradient(135deg, #f8f9fa, #eef1f5);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 60px;
    color: #ccc;
}
.about-img-placeholder p { font-size: 14px; color: #999; margin-top: 12px; }

/* Timeline */
.timeline-section { margin-bottom: 60px; }
.timeline { position: relative; max-width: 800px; margin: 0 auto; }
.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: #f5a623;
    transform: translateX(-50%);
}
.timeline-item { position: relative; width: 50%; padding: 10px 40px; margin-bottom: 20px; }
.timeline-item.left { left: 0; text-align: right; }
.timeline-item.right { left: 50%; text-align: left; }
.timeline-dot {
    position: absolute;
    top: 18px;
    width: 16px;
    height: 16px;
    background: #f5a623;
    border: 3px solid #fff;
    border-radius: 50%;
    box-shadow: 0 0 0 3px #f5a623;
}
.timeline-item.left .timeline-dot { right: -8px; }
.timeline-item.right .timeline-dot { left: -8px; }
.timeline-content {
    background: #fff;
    padding: 18px 22px;
    border-radius: 10px;
    border: 1px solid #eee;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.timeline-year { font-size: 20px; font-weight: 700; color: #f5a623; display: block; margin-bottom: 6px; }
.timeline-content p { font-size: 14px; color: #555; line-height: 1.6; }

/* OEM Section */
.oem-section { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; margin-bottom: 60px; }
.oem-content h2 { font-size: 26px; color: #1a2332; margin: 10px 0 14px; }
.oem-content p { color: #555; line-height: 1.8; margin-bottom: 20px; }
.oem-list { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 24px; }
.oem-item { font-size: 14px; color: #555; }

/* Cert */
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.cert-card {
    background: #fff;
    border: 2px solid #eee;
    border-radius: 12px;
    padding: 30px 20px;
    text-align: center;
    transition: all 0.3s;
}
.cert-card:hover { border-color: #f5a623; transform: translateY(-4px); }
.cert-card span {
    display: block;
    font-size: 32px;
    font-weight: 800;
    color: #1a2332;
    margin-bottom: 8px;
}
.cert-card p { font-size: 13px; color: #666; }

/* ---------- Contact Page ---------- */
.contact-layout { display: grid; grid-template-columns: 1fr 1.2fr; gap: 50px; }
.contact-info h2 { font-size: 28px; color: #1a2332; margin: 10px 0 14px; }
.contact-info > p { color: #555; line-height: 1.8; margin-bottom: 28px; }
.contact-cards { margin-bottom: 28px; }
.contact-card {
    display: flex;
    gap: 14px;
    padding: 16px 0;
    border-bottom: 1px solid #eee;
}
.contact-card:last-child { border-bottom: none; }
.contact-icon {
    width: 44px;
    height: 44px;
    background: #fff8ed;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}
.contact-card h4 { font-size: 14px; color: #1a2332; margin-bottom: 2px; }
.contact-card p { font-size: 13.5px; color: #666; margin: 0; }
.contact-whatsapp-box {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: 12px;
    padding: 20px;
    text-align: center;
}
.contact-whatsapp-box p { margin-bottom: 12px; color: #166534; font-weight: 600; }

.contact-form-wrap {
    background: #fff;
    border: 1px solid #eee;
    border-radius: 12px;
    padding: 32px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.04);
}
.contact-form-wrap h3 { font-size: 20px; color: #1a2332; margin-bottom: 20px; }
.form-error {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 14px;
}
.form-success { text-align: center; padding: 40px 20px; }
.success-icon { font-size: 56px; margin-bottom: 16px; }
.form-success h3 { font-size: 24px; color: #1a2332; margin-bottom: 10px; }
.form-success p { color: #666; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; color: #1a2332; margin-bottom: 6px; }
.form-group input, .form-group textarea {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}
.form-group input:focus, .form-group textarea:focus { border-color: #f5a623; }
.form-group textarea { resize: vertical; }
.form-note { font-size: 12px; color: #999; text-align: center; margin-top: 14px; }

/* ---------- Responsive ---------- */
@media (max-width: 992px) {
    .scene-grid, .type-grid, .product-grid { grid-template-columns: repeat(3, 1fr); }
    .advantage-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-inner { grid-template-columns: 1fr 1fr; }
    .product-detail, .about-intro, .oem-section, .contact-layout { grid-template-columns: 1fr; }
    .hero h1 { font-size: 34px; }
}
@media (max-width: 768px) {
    .top-bar { display: none; }
    .main-nav {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 16px;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        gap: 4px;
    }
    .main-nav.open { display: flex; }
    .main-nav a { width: 100%; padding: 12px 16px; }
    .nav-cta { margin-left: 0; text-align: center; }
    .mobile-menu-btn { display: block; }
    .scene-grid, .type-grid, .product-grid { grid-template-columns: repeat(2, 1fr); }
    .cert-grid { grid-template-columns: repeat(2, 1fr); }
    .about-stats { grid-template-columns: repeat(2, 1fr); }
    .hero { padding: 50px 0 70px; }
    .hero h1 { font-size: 28px; }
    .hero-stats { gap: 24px; }
    .stat-num { font-size: 28px; }
    .section { padding: 50px 0; }
    .section-header h2 { font-size: 24px; }
    .timeline::before { left: 20px; }
    .timeline-item { width: 100%; left: 0 !important; text-align: left !important; padding-left: 50px; padding-right: 10px; }
    .timeline-item .timeline-dot { left: 12px !important; right: auto !important; }
    .form-row { grid-template-columns: 1fr; }
    .shipping-info { grid-template-columns: 1fr; }
    .product-detail-highlights { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; gap: 30px; }
}
@media (max-width: 480px) {
    .scene-grid, .type-grid, .product-grid, .advantage-grid { grid-template-columns: 1fr; }
    .hero-buttons .btn { width: 100%; }
    .filter-search input { width: 160px; }
}