:root {
    --navy: #0a1628;
    --navy-mid: #152a4a;
    --primary: #1a56db;
    --primary-light: #3b82f6;
    --primary-lighter: #dbeafe;
    --accent: #f97316;
    --accent-light: #fed7aa;
    --sky: #eff6ff;
    --text: #0f172a;
    --muted: #64748b;
    --muted-light: #94a3b8;
    --line: rgba(15, 23, 42, 0.08);
    --white: #ffffff;
    --shadow-sm: 0 1px 3px rgba(7, 20, 50, 0.08);
    --shadow: 0 8px 32px rgba(7, 20, 50, 0.12);
    --shadow-lg: 0 24px 64px rgba(7, 20, 50, 0.18);
    --container: min(1200px, calc(100% - 48px));
    --radius: 12px;
    --radius-sm: 8px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text);
    background: var(--white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; }
.container { width: var(--container); margin: 0 auto; }

/* === LANGUAGE SWITCH === */
body[data-lang="en"] [data-lang="zh"],
body[data-lang="zh"] [data-lang="en"] { display: none; }

/* === HEADER === */
.site-header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--line);
}
.top-strip {
    background: linear-gradient(90deg, var(--navy), #1a2f5e);
    color: rgba(255,255,255,0.8);
    font-size: 12.5px;
}
.top-strip-inner {
    display: flex; align-items: center; justify-content: space-between;
    min-height: 38px; gap: 16px;
}
.top-line span {
    display: inline-flex; align-items: center; gap: 7px;
}
.top-line i { color: var(--primary-light); }
.lang-switch { display: inline-flex; gap: 4px; }
.lang-btn {
    border: 1px solid rgba(255,255,255,0.2);
    background: transparent; color: rgba(255,255,255,0.7);
    width: 36px; height: 28px; cursor: pointer;
    font-size: 12px; font-weight: 600; letter-spacing: 0.04em;
    transition: all 0.2s;
}
.lang-btn.active { background: var(--white); color: var(--navy); border-color: var(--white); }
.lang-btn:hover:not(.active) { background: rgba(255,255,255,0.12); color: #fff; }
.social-btns { display: inline-flex; gap: 6px; margin-left: 6px; }
.social-btn {
    width: 28px; height: 28px; border-radius: 6px;
    border: 1px solid rgba(255,255,255,0.25);
    background: transparent; color: rgba(255,255,255,0.7);
    display: grid; place-items: center; font-size: 13px;
    transition: all 0.2s; text-decoration: none;
}
.social-btn:hover { background: rgba(255,255,255,0.15); color: #fff; border-color: rgba(255,255,255,0.5); }
.nav-shell {
    display: flex; align-items: center; justify-content: space-between;
    min-height: 80px; gap: 20px;
}
.brand { display: inline-flex; align-items: center; gap: 14px; }
.brand-mark {
    width: 50px; height: 50px;
    display: grid; place-items: center;
    background: linear-gradient(135deg, var(--primary), var(--navy));
    color: #fff; font-weight: 800; font-size: 18px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(26, 86, 219, 0.35);
    letter-spacing: -0.5px;
}
.brand-copy { display: grid; gap: 2px; }
.brand-copy strong { font-size: 16px; font-weight: 700; letter-spacing: 0.01em; color: var(--navy); }
.brand-copy em { font-style: normal; color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em; }
.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
    padding: 8px 16px; font-size: 13.5px; font-weight: 500;
    color: var(--muted); border-radius: var(--radius-sm);
    transition: all 0.2s; position: relative;
    text-transform: uppercase; letter-spacing: 0.06em;
}
.site-nav a::after {
    content: ''; position: absolute; bottom: 2px; left: 50%; right: 50%;
    height: 2px; background: var(--primary); border-radius: 1px;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
.site-nav a.active, .site-nav a:hover { color: var(--primary); }
.site-nav a.active::after, .site-nav a:hover::after { left: 16px; right: 16px; }
.nav-toggle { display: none; border: 0; background: transparent; padding: 4px; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; margin: 5px 0; background: var(--navy); border-radius: 1px; }

/* === HERO === */
.brochure-hero {
    position: relative; min-height: 88vh;
    display: flex; align-items: center;
    overflow: hidden;
}
.brochure-hero-media {
    position: absolute; inset: 0;
    background-size: cover; background-position: center;
    background: linear-gradient(135deg, #0a1628 0%, #162d55 40%, #0f2744 100%);
}
.brochure-hero-media::after {
    content: ''; position: absolute; inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.brochure-hero-inner, .page-banner-inner { position: relative; z-index: 1; }
.brochure-copy { max-width: 820px; color: #fff; padding: 80px 0; }
.brochure-copy .badge {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    padding: 6px 16px; border-radius: 50px;
    font-size: 12px; text-transform: uppercase; letter-spacing: 0.18em;
    color: var(--primary-light); margin-bottom: 24px;
    backdrop-filter: blur(8px);
}
.brochure-copy .badge-dot {
    width: 6px; height: 6px; background: var(--accent);
    border-radius: 50%; animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}
.section-kicker {
    margin: 0 0 16px; font-size: 11px;
    text-transform: uppercase; letter-spacing: 0.22em;
    color: rgba(255,255,255,0.6);
}
.brochure-copy h1, .page-banner-inner h1 {
    margin: 0; line-height: 1.08; font-weight: 800;
}
.brochure-copy h1 { font-size: clamp(40px, 5.5vw, 78px); }
.brochure-copy .hero-sub {
    font-size: 17px; line-height: 1.8; color: rgba(255,255,255,0.75);
    max-width: 600px; margin: 20px 0 0;
}
.lead {
    margin: 20px 0 0; font-size: 17px; line-height: 1.9;
    color: rgba(255,255,255,0.8); max-width: 680px;
}
.hero-actions { display: flex; gap: 14px; margin-top: 36px; flex-wrap: wrap; }
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 13px 28px; border-radius: 50px; font-weight: 700;
    letter-spacing: 0.06em; text-transform: uppercase;
    font-size: 13px; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer; border: 0;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 16px rgba(26, 86, 219, 0.4);
}
.btn-primary:hover {
    background: var(--accent);
    box-shadow: 0 8px 24px rgba(249, 115, 22, 0.45);
    transform: translateY(-3px);
}
.btn-outline-light {
    border: 1.5px solid rgba(255,255,255,0.4); color: #fff;
    background: rgba(255,255,255,0.06); backdrop-filter: blur(8px);
}
.btn-outline-light:hover {
    background: rgba(255,255,255,0.15);
    border-color: rgba(255,255,255,0.7);
    transform: translateY(-3px);
}

/* === STATS STRIP === */
.stats-strip {
    background: linear-gradient(135deg, var(--navy) 0%, var(--primary) 100%);
    padding: 0;
    position: relative; z-index: 2; margin-top: -1px;
}
.stats-strip-inner {
    display: grid; grid-template-columns: repeat(4, 1fr);
    divide: 1px solid rgba(255,255,255,0.1);
}
.stat-item {
    padding: 40px 24px; text-align: center;
    border-right: 1px solid rgba(255,255,255,0.08);
    position: relative;
}
.stat-item:last-child { border-right: none; }
.stat-item .stat-num {
    display: block; font-size: clamp(36px, 4vw, 56px);
    font-weight: 800; color: #fff; line-height: 1;
    letter-spacing: -2px;
}
.stat-item .stat-num span { color: var(--accent); }
.stat-item .stat-label {
    display: block; margin-top: 8px;
    font-size: 12px; text-transform: uppercase;
    letter-spacing: 0.14em; color: rgba(255,255,255,0.6);
}

/* === SECTIONS === */
.section-white { padding: 96px 0; background: var(--white); }
.section-light { padding: 96px 0; background: linear-gradient(180deg, #f8fafc 0%, #eff6ff 100%); }
.section-navy { padding: 96px 0; background: linear-gradient(135deg, var(--navy) 0%, #162d55 100%); color: #fff; }
.section-accent { padding: 80px 0; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); color: #fff; }

.intro-sheet-inner { max-width: 1200px; }
.narrow-sheet { max-width: 960px; }
.sheet-heading {
    display: flex; align-items: center; gap: 14px; margin-bottom: 12px;
}
.title-chip {
    width: 20px; height: 20px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 4px;
}
.sheet-heading p {
    margin: 0; font-size: 15px; text-transform: uppercase;
    letter-spacing: 0.12em; color: var(--primary); font-weight: 600;
}
.sheet-title { margin-bottom: 28px; }
.sheet-title h2 {
    font-size: clamp(36px, 4.5vw, 72px); font-weight: 800; line-height: 1.05;
    color: var(--navy);
}
.sheet-title span { color: var(--primary); }
.section-head { margin-bottom: 36px; }
.section-head h2 {
    margin: 0 0 12px; font-size: clamp(30px, 3.5vw, 52px);
    font-weight: 800; line-height: 1.1; color: var(--navy);
}
.section-head .section-desc {
    font-size: 17px; color: var(--muted); max-width: 560px;
    line-height: 1.7; margin: 12px 0 0;
}
.section-head.light h2 { color: #fff; }
.section-head.light .section-desc { color: rgba(255,255,255,0.7); }

/* === COLUMNS === */
.sheet-columns { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: start; }
.sheet-text p, .long-copy p {
    margin: 0 0 18px; font-size: 16.5px; line-height: 1.95;
    color: var(--muted);
}

/* === SYSTEM CARDS === */
.system-grid {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px;
}
.system-card {
    background: var(--white); border-radius: var(--radius);
    padding: 32px; border: 1px solid var(--line);
    box-shadow: var(--shadow-sm);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative; overflow: hidden;
}
.system-card::before {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(26,86,219,0.04), transparent);
    opacity: 0; transition: opacity 0.3s;
}
.system-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(26,86,219,0.2);
}
.system-card:hover::before { opacity: 1; }
.system-no {
    display: inline-block; margin-bottom: 18px;
    color: var(--primary); font-size: 12px;
    font-weight: 700; letter-spacing: 0.18em;
    opacity: 0.7;
}
.system-card h3 { margin: 0 0 14px; font-size: 24px; line-height: 1.2; color: var(--navy); font-weight: 700; }
.system-card p { margin: 0; font-size: 14.5px; line-height: 1.85; color: var(--muted); }
.system-card .card-icon {
    width: 52px; height: 52px; border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-lighter), #bfdbfe);
    display: grid; place-items: center;
    margin-bottom: 20px;
    transition: transform 0.3s;
}
.system-card:hover .card-icon { transform: scale(1.08) rotate(-3deg); }
.system-card .card-icon i { font-size: 22px; color: var(--primary); }

/* === ADVANTAGE GRID === */
.advantage-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.advantage-card {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius); padding: 28px 24px;
    text-align: center; transition: all 0.3s;
}
.advantage-card:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.25);
    transform: translateY(-4px);
}
.advantage-card .adv-icon {
    width: 56px; height: 56px; border-radius: 50%;
    background: rgba(255,255,255,0.1); margin: 0 auto 16px;
    display: grid; place-items: center;
}
.advantage-card .adv-icon i { font-size: 22px; color: var(--accent); }
.advantage-card h3 { font-size: 17px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.advantage-card p { font-size: 13px; color: rgba(255,255,255,0.6); line-height: 1.7; }

/* === DATA PANEL === */
.data-panel {
    border-left: 2px solid var(--primary-lighter);
    padding-left: 36px; display: grid; gap: 20px;
}
.data-block {
    padding: 16px 0; border-bottom: 1px solid var(--line);
}
.data-block:last-child { border-bottom: none; }
.data-block strong { display: block; font-size: 36px; font-weight: 800; color: var(--primary); line-height: 1; }
.data-block span { color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: 0.1em; display: block; margin-top: 4px; }

/* === CAPACITY GRID === */
.capacity-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.capacity-list { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.capacity-item, .fact-card {
    background: var(--white); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
}
.capacity-item:hover, .fact-card:hover {
    box-shadow: var(--shadow);
    border-color: rgba(26,86,219,0.15);
    transform: translateY(-3px);
}
.capacity-item strong { display: block; font-size: 34px; font-weight: 800; color: var(--primary); line-height: 1; }
.capacity-item span { display: block; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.1em; margin-top: 6px; }

/* === PRODUCT CARDS === */
.product-card {
    background: var(--white); border-radius: var(--radius);
    border: 1px solid var(--line); overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}
.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(26,86,219,0.15);
}
.product-card .product-img {
    height: 180px; background: linear-gradient(135deg, #e2e8f0, #cbd5e1);
    display: grid; place-items: center;
    position: relative; overflow: hidden;
}
.product-card .product-img i {
    font-size: 48px; color: #94a3b8;
    transition: transform 0.4s;
}
.product-card:hover .product-img i { transform: scale(1.15); }
.product-card .product-tag {
    position: absolute; top: 12px; left: 12px;
    background: var(--primary); color: #fff;
    font-size: 11px; font-weight: 600; letter-spacing: 0.08em;
    padding: 4px 12px; border-radius: 50px; text-transform: uppercase;
}
.product-card .product-body { padding: 22px; }
.product-card h3 { font-size: 19px; font-weight: 700; color: var(--navy); margin-bottom: 10px; }
.product-card p { font-size: 14px; color: var(--muted); line-height: 1.75; margin-bottom: 16px; }
.product-card .product-link {
    display: inline-flex; align-items: center; gap: 6px;
    color: var(--primary); font-size: 13px; font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.08em;
}
.product-card .product-link i { transition: transform 0.2s; }
.product-card:hover .product-link i { transform: translateX(4px); }

/* === FACTS GRID === */
.facts-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.fact-card { text-align: center; padding: 32px 24px; }
.fact-card .fact-icon {
    width: 60px; height: 60px; border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-lighter), #bfdbfe);
    display: grid; place-items: center; margin: 0 auto 16px;
}
.fact-card .fact-icon i { font-size: 24px; color: var(--primary); }
.fact-card h3 { font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 12px; }
.fact-card p { font-size: 36px; font-weight: 800; color: var(--navy); line-height: 1.1; margin: 0; }
.fact-card p small { font-size: 14px; font-weight: 500; color: var(--muted); }

/* === PAGE BANNER === */
.page-banner {
    min-height: 380px; display: flex; align-items: flex-end;
    background-size: cover; background-position: center;
    background: linear-gradient(135deg, var(--navy) 0%, #162d55 100%);
    position: relative; overflow: hidden;
}
.page-banner::before {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(90deg, rgba(10,22,40,0.85), rgba(10,22,40,0.3));
}
.page-banner-inner { position: relative; z-index: 1; color: #fff; padding: 80px 0 48px; }
.page-banner-inner h1 { font-size: clamp(36px, 5vw, 68px); font-weight: 800; }
.profile-facts, .product-sheet, .contact-sheet { padding: 88px 0; }

/* === CAPABILITY SECTION === */
.capability-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.capability-card {
    background: var(--white); border-radius: var(--radius);
    padding: 28px; border: 1px solid var(--line);
    box-shadow: var(--shadow-sm);
    display: flex; gap: 20px; align-items: flex-start;
    transition: all 0.3s;
}
.capability-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.capability-card .cap-icon {
    width: 48px; height: 48px; flex-shrink: 0;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary-lighter), #bfdbfe);
    display: grid; place-items: center;
}
.capability-card .cap-icon i { font-size: 20px; color: var(--primary); }
.capability-card h3 { font-size: 17px; font-weight: 700; color: var(--navy); margin-bottom: 8px; }
.capability-card p { font-size: 14px; color: var(--muted); line-height: 1.75; margin: 0; }

/* === CONTACT === */
.contact-export-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 32px; }
.contact-card {
    background: var(--white); border-radius: var(--radius);
    padding: 32px; border: 1px solid var(--line);
    box-shadow: var(--shadow-sm);
}
.contact-card h2 { margin-top: 0; font-size: 26px; font-weight: 800; color: var(--navy); margin-bottom: 20px; }
.contact-card p { font-size: 15px; color: var(--muted); line-height: 1.8; margin-bottom: 12px; display: flex; gap: 8px; align-items: flex-start; }
.contact-card p i { color: var(--primary); margin-top: 3px; flex-shrink: 0; }
.contact-card p strong { color: var(--navy); min-width: 80px; }
.contact-form { display: grid; gap: 16px; }
.contact-form label { display: grid; gap: 6px; font-size: 13px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }
.contact-form input, .contact-form textarea {
    padding: 13px 16px; border: 1.5px solid #e2e8f0;
    border-radius: var(--radius-sm); transition: border-color 0.2s;
    background: #f8fafc;
}
.contact-form input:focus, .contact-form textarea:focus {
    outline: none; border-color: var(--primary);
    background: var(--white);
}

/* === CTA STRIP === */
.cta-strip {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    padding: 72px 0; text-align: center; position: relative; overflow: hidden;
}
.cta-strip::before {
    content: ''; position: absolute; inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M0 40L40 0H20L0 20M40 40V20L20 40'/%3E%3C/g%3E%3C/svg%3E");
}
.cta-strip h2 { font-size: clamp(28px, 3.5vw, 48px); font-weight: 800; color: #fff; margin-bottom: 12px; }
.cta-strip p { font-size: 17px; color: rgba(255,255,255,0.8); margin-bottom: 28px; }
.cta-strip .btn-primary { background: var(--accent); box-shadow: 0 4px 20px rgba(249,115,22,0.45); }

/* === FOOTER === */
.site-footer {
    background: var(--navy); color: rgba(255,255,255,0.75);
    padding-top: 60px;
}
.export-footer-grid {
    display: grid; grid-template-columns: 1.4fr 0.8fr 1fr; gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-grid a, .footer-grid p { display: block; margin: 0 0 10px; font-size: 14px; }
.footer-brand { margin-bottom: 12px !important; }
.footer-brand .brand-mark { background: linear-gradient(135deg, var(--primary), #2563eb); }
.footer-brand .brand-copy strong { color: #fff; font-size: 15px; }
.footer-brand .brand-copy em { color: rgba(255,255,255,0.5); }
.footer-grid h3 {
    color: #fff; margin: 0 0 16px;
    text-transform: uppercase; letter-spacing: 0.1em;
    font-size: 13px; font-weight: 700;
}
.footer-grid a:hover { color: var(--primary-light); }
.footer-bottom {
    padding: 20px 0 24px; font-size: 13px;
    color: rgba(255,255,255,0.4);
}

/* === BACK TO TOP === */
.back-to-top {
    position: fixed; right: 20px; bottom: 24px;
    width: 46px; height: 46px;
    display: grid; place-items: center;
    border: 0; background: var(--primary);
    color: #fff; border-radius: 50%;
    box-shadow: 0 4px 16px rgba(26,86,219,0.4);
    opacity: 0; pointer-events: none;
    transition: all 0.3s; cursor: pointer;
}
.back-to-top.show { opacity: 1; pointer-events: auto; }
.back-to-top:hover { background: var(--accent); transform: translateY(-3px); }

/* === REVEAL ANIMATION === */
.reveal {
    opacity: 0; transform: translateY(28px);
    transition: opacity 0.65s cubic-bezier(0.4, 0, 0.2, 1), transform 0.65s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal.visible, .visible-on-load { opacity: 1; transform: none; }

/* === RESPONSIVE === */
@media (max-width: 980px) {
    .sheet-columns, .capacity-grid, .contact-export-grid,
    .export-footer-grid, .system-grid, .facts-grid,
    .advantage-grid, .capacity-list, .capability-grid {
        grid-template-columns: 1fr;
    }
    .brochure-copy h1 { max-width: none; }
    .stats-strip-inner { grid-template-columns: repeat(2, 1fr); }
    .stat-item:nth-child(2) { border-right: none; }
    .stat-item:nth-child(1), .stat-item:nth-child(2) { border-bottom: 1px solid rgba(255,255,255,0.08); }
}
@media (max-width: 760px) {
    .nav-toggle { display: block; }
    .site-nav {
        display: none; position: absolute; top: 100%;
        left: 0; right: 0;
        flex-direction: column; align-items: stretch;
        background: #fff; padding: 12px 20px;
        box-shadow: var(--shadow-lg);
        border-radius: 0 0 var(--radius) var(--radius);
    }
    .site-nav.open { display: flex; }
    .site-nav a { padding: 12px 16px; }
    .site-nav a::after { display: none; }
    .nav-shell { position: relative; min-height: 70px; }
    .top-strip-inner { flex-direction: column; align-items: flex-start; padding: 8px 0; gap: 8px; }
    .brochure-hero { min-height: 78vh; }
    .sheet-title h2, .brochure-copy h1, .page-banner-inner h1, .section-head h2 { max-width: none; }
    .hero-actions { flex-direction: column; align-items: flex-start; }
    .stats-strip-inner { grid-template-columns: repeat(2, 1fr); }
    .advantage-grid { grid-template-columns: 1fr 1fr; }
}
/* === PRODUCT CENTER === */
.prod-tabs-bar {
    background: var(--white);
    border-bottom: 1px solid var(--line);
    position: sticky; top: 119px; z-index: 90;
    box-shadow: var(--shadow-sm);
}
.prod-tabs {
    display: flex; gap: 4px; overflow-x: auto; padding: 0 0 2px;
    scrollbar-width: none;
}
.prod-tabs::-webkit-scrollbar { display: none; }
.prod-tab {
    display: flex; flex-direction: column; align-items: center; gap: 5px;
    padding: 18px 28px; border: 0; background: transparent;
    color: var(--muted); cursor: pointer; border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    font-size: 13px; font-weight: 600; white-space: nowrap;
    transition: all 0.2s; min-width: 120px;
    border-bottom: 3px solid transparent;
}
.prod-tab i { font-size: 20px; }
.prod-tab.active {
    color: var(--primary); border-bottom-color: var(--primary);
    background: var(--sky);
}
.prod-tab:hover:not(.active) { color: var(--navy); background: #f1f5f9; }

/* Section layout */
.prod-section { display: none; padding: 80px 0; }
.prod-section.active { display: block; }

.prod-section-header {
    display: flex; align-items: flex-start; gap: 28px;
    margin-bottom: 52px; padding-bottom: 36px;
    border-bottom: 1px solid var(--line);
}
.prod-section-icon {
    width: 64px; height: 64px; flex-shrink: 0;
    background: linear-gradient(135deg, var(--primary-lighter), #bfdbfe);
    border-radius: 16px; display: grid; place-items: center;
    box-shadow: var(--shadow-sm);
}
.prod-section-icon i { font-size: 28px; color: var(--primary); }
.prod-section-tag {
    font-size: 11px; text-transform: uppercase; letter-spacing: 0.2em;
    color: var(--primary); font-weight: 700; margin-bottom: 6px;
}
.prod-section-header h2 {
    font-size: clamp(28px, 3.5vw, 44px); font-weight: 800;
    color: var(--navy); margin: 0 0 12px; line-height: 1.1;
}
.prod-section-header h2 span { display: block; font-size: 14px; font-weight: 400; color: var(--muted); margin-top: 4px; text-transform: none; letter-spacing: 0; }
.prod-section-desc { font-size: 16px; color: var(--muted); line-height: 1.8; max-width: 680px; margin: 0; }

/* Product grid */
.prod-grid {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px;
}

/* Product item card */
.prod-item {
    background: var(--white); border-radius: var(--radius);
    border: 1px solid var(--line); overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex; flex-direction: column;
}
.prod-item:hover {
    transform: translateY(-6px); box-shadow: var(--shadow-lg);
    border-color: rgba(26,86,219,0.18);
}
.prod-item-img {
    height: 180px; background: linear-gradient(135deg, #e2e8f0, #cbd5e1);
    display: grid; place-items: center; position: relative; overflow: hidden;
}
.prod-item-img::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(26,86,219,0.04), transparent);
}
.prod-item-img i { font-size: 52px; color: #94a3b8; transition: transform 0.4s; }
.prod-item:hover .prod-item-img i { transform: scale(1.12) rotate(-3deg); }
.prod-item-body { padding: 28px 28px 32px; flex: 1; display: flex; flex-direction: column; }
.prod-item-body h3 {
    font-size: 18px; font-weight: 700; color: var(--navy);
    margin-bottom: 10px; line-height: 1.3;
}
.prod-item-body h3 span { display: block; font-size: 12px; font-weight: 400; color: var(--muted); margin-top: 2px; }
.prod-item-body p { font-size: 14px; color: var(--muted); line-height: 1.8; margin-bottom: 20px; }

/* Specs table */
.prod-specs {
    margin-top: auto; border: 1px solid var(--line);
    border-radius: var(--radius-sm); overflow: hidden;
    background: #f8fafc;
}
.prod-spec-row {
    display: grid; grid-template-columns: 110px 1fr;
    gap: 12px; align-items: center;
    padding: 10px 14px; font-size: 13px;
    border-bottom: 1px solid var(--line);
}
.prod-spec-row:last-child { border-bottom: none; }
.prod-spec-row span:first-child {
    color: var(--muted); font-size: 11px; text-transform: uppercase;
    letter-spacing: 0.06em;
}
.prod-spec-row strong { color: var(--navy); font-weight: 700; font-size: 13px; }

@media (max-width: 980px) {
    .prod-grid { grid-template-columns: 1fr; }
    .prod-tabs { flex-wrap: nowrap; }
    .prod-tabs-bar { top: 101px; }
    .prod-section-header { flex-direction: column; }
}
@media (max-width: 760px) {
    .prod-tabs-bar { top: 81px; }
    .prod-tab { min-width: 90px; padding: 14px 18px; font-size: 12px; }
    .prod-tab i { font-size: 18px; }
    .prod-section-header h2 { font-size: 28px; }
}

@media (max-width: 480px) {
    .advantage-grid { grid-template-columns: 1fr; }
    .stats-strip-inner { grid-template-columns: 1fr 1fr; }
}

/* === BREADCRUMB === */
.breadcrumb-bar {
    background: var(--white);
    border-bottom: 1px solid var(--line);
    padding: 12px 0;
}
.breadcrumb {
    display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
    font-size: 13px; color: var(--muted);
}
.breadcrumb a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
.breadcrumb a:hover { color: var(--navy); }
.breadcrumb .sep { color: #cbd5e1; font-size: 11px; }
.breadcrumb span:last-child { color: var(--muted); font-weight: 600; }

/* === DETAIL HERO === */
.detail-hero { padding: 48px 0 64px; }
.detail-layout {
    display: grid; grid-template-columns: 480px 1fr; gap: 64px; align-items: start;
}

/* Gallery */
.detail-gallery { position: sticky; top: 140px; }
.gallery-main {
    width: 100%; aspect-ratio: 1 / 0.85; border-radius: var(--radius);
    overflow: hidden; background: #f1f5f9; border: 1px solid var(--line);
    display: flex; align-items: center; justify-content: center;
    position: relative;
}
.gallery-main img { width: 100%; height: 100%; object-fit: cover; }
.gallery-thumbs {
    display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap;
}
.gallery-thumb {
    width: 72px; height: 72px; border-radius: var(--radius-sm);
    overflow: hidden; border: 2px solid transparent; cursor: pointer;
    background: #f1f5f0; display: flex; align-items: center; justify-content: center;
    transition: all 0.2s;
}
.gallery-thumb img { width: 100%; height: 100%; object-fit: cover; }
.gallery-thumb:hover, .gallery-thumb.active { border-color: var(--primary); }
.gallery-thumb-placeholder {
    width: 72px; height: 72px; border-radius: var(--radius-sm);
    overflow: hidden; border: 2px solid transparent; cursor: pointer;
    background: linear-gradient(135deg, #e2e8f0, #cbd5e1);
    display: grid; place-items: center; transition: all 0.2s;
}
.gallery-thumb-placeholder:hover, .gallery-thumb-placeholder.active { border-color: var(--primary); }
.gallery-thumb-placeholder i { font-size: 22px; color: #94a3b8; }

/* Info Panel */
.detail-info { padding-top: 8px; }
.detail-category-tag {
    font-size: 11px; text-transform: uppercase; letter-spacing: 0.18em;
    color: var(--primary); font-weight: 700; margin-bottom: 10px;
}
.detail-info h1 {
    font-size: clamp(26px, 3vw, 38px); font-weight: 800; color: var(--navy);
    margin: 0 0 14px; line-height: 1.15;
}
.detail-tagline {
    font-size: 16px; color: var(--muted); line-height: 1.7; margin-bottom: 28px;
}
.detail-specs-summary {
    background: #f8fafc; border: 1px solid var(--line); border-radius: var(--radius-sm);
    padding: 18px 22px; margin-bottom: 28px; display: flex; flex-direction: column; gap: 10px;
}
.detail-spec-summary-row {
    display: flex; align-items: center; gap: 10px; font-size: 14px;
}
.detail-spec-summary-row .spec-label { color: var(--muted); min-width: 130px; font-size: 12px; }
.detail-spec-summary-row .spec-value { color: var(--navy); font-weight: 700; }
.detail-cta-group { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 28px; }
.btn-lg { padding: 14px 32px; font-size: 15px; }
.btn-outline {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 13px 24px; font-size: 14px; font-weight: 600;
    border: 2px solid var(--line); border-radius: var(--radius-sm);
    background: transparent; color: var(--muted); text-decoration: none;
    transition: all 0.25s; cursor: pointer;
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: var(--sky); }
.detail-meta { display: flex; gap: 20px; flex-wrap: wrap; }
.detail-meta-item {
    display: flex; align-items: center; gap: 7px;
    font-size: 13px; color: var(--muted);
}
.detail-meta-item i { color: var(--primary); font-size: 14px; }

/* === DETAIL TABS === */
.detail-tabs-section { background: var(--white); padding: 0 0 80px; }
.detail-tabs {
    display: flex; border-bottom: 2px solid var(--line);
    gap: 0; margin-bottom: 40px;
}
.detail-tab {
    padding: 18px 28px; border: 0; background: transparent;
    font-size: 14px; font-weight: 600; color: var(--muted); cursor: pointer;
    border-bottom: 3px solid transparent; margin-bottom: -2px;
    transition: all 0.2s; white-space: nowrap;
}
.detail-tab:hover { color: var(--navy); }
.detail-tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.detail-tab-panel { display: none; }
.detail-tab-panel.active { display: block; }
.tab-panel-inner { max-width: 860px; }

/* Description */
.detail-description-text {
    font-size: 15px; color: var(--muted); line-height: 1.9; margin-bottom: 36px;
}
.detail-features-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
}
.detail-feature-item {
    background: #f8fafc; border: 1px solid var(--line); border-radius: var(--radius-sm);
    padding: 20px; display: flex; flex-direction: column; gap: 10px;
}
.detail-feature-item i { font-size: 24px; color: var(--primary); }
.detail-feature-item h4 { font-size: 14px; font-weight: 700; color: var(--navy); margin: 0; }
.detail-feature-item p { font-size: 13px; color: var(--muted); line-height: 1.6; margin: 0; }

/* Specs Table */
.detail-specs-table-wrap { overflow-x: auto; }
.detail-specs-table {
    width: 100%; border-collapse: collapse; font-size: 14px;
    border: 1px solid var(--line); border-radius: var(--radius-sm); overflow: hidden;
}
.detail-specs-table th {
    background: var(--navy); color: #fff; padding: 14px 20px;
    text-align: left; font-weight: 700; font-size: 13px; letter-spacing: 0.06em;
}
.detail-specs-table td {
    padding: 12px 20px; border-bottom: 1px solid var(--line);
    color: var(--muted);
}
.detail-specs-table td:nth-child(3) { color: var(--navy); font-weight: 700; }
.detail-specs-table tr:last-child td { border-bottom: none; }
.detail-specs-table tr:nth-child(even) td { background: #f8fafc; }

/* Applications */
.detail-apps-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
}
.detail-app-item {
    background: #f8fafc; border: 1px solid var(--line); border-radius: var(--radius-sm);
    padding: 20px 16px; text-align: center; display: flex; flex-direction: column;
    align-items: center; gap: 10px;
}
.detail-app-item i { font-size: 28px; color: var(--primary); }
.detail-app-item span { font-size: 13px; color: var(--navy); font-weight: 600; line-height: 1.3; }

/* Certifications */
.detail-certs-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 28px;
}
.cert-badge {
    border: 1px solid var(--line); border-radius: var(--radius-sm);
    padding: 24px 16px; text-align: center;
    background: #f8fafc; display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.cert-badge i { font-size: 32px; color: var(--primary); }
.cert-badge h4 { font-size: 14px; font-weight: 700; color: var(--navy); margin: 0; }
.cert-badge p { font-size: 12px; color: var(--muted); margin: 0; line-height: 1.5; }
.detail-cert-note {
    font-size: 14px; color: var(--muted); line-height: 1.7; font-style: italic;
}

/* Related Products */
.detail-related-section { background: #f8fafc; padding: 64px 0; }
.detail-related-heading {
    font-size: clamp(22px, 2.5vw, 30px); font-weight: 800; color: var(--navy);
    margin: 0 0 36px; text-align: center;
}
.detail-related-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.related-card {
    background: var(--white); border-radius: var(--radius); overflow: hidden;
    border: 1px solid var(--line); transition: all 0.3s; text-decoration: none;
    display: flex; flex-direction: column;
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.related-card-img {
    height: 160px; background: #e2e8f0;
    overflow: hidden;
    position: relative;
}
.related-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s; }
.related-card:hover .related-card-img img { transform: scale(1.05); }
.related-card-img i { font-size: 40px; color: #94a3b8; }
.related-card-body { padding: 18px; }
.related-card-body h4 { font-size: 15px; font-weight: 700; color: var(--navy); margin: 0 0 6px; }
.related-card-body p { font-size: 12px; color: var(--muted); margin: 0; line-height: 1.6; }

/* Product card detail link */
.prod-detail-link {
    display: inline-flex; align-items: center; gap: 6px;
    margin-top: 16px; padding: 9px 18px;
    background: var(--primary); color: #fff;
    border-radius: var(--radius-sm); font-size: 13px; font-weight: 600;
    text-decoration: none; transition: all 0.25s;
}
.prod-detail-link:hover { background: var(--navy); }
.prod-detail-link i { font-size: 11px; }

/* Responsive */
@media (max-width: 980px) {
    .detail-layout { grid-template-columns: 1fr; gap: 36px; }
    .detail-gallery { position: static; }
    .detail-features-grid { grid-template-columns: repeat(2, 1fr); }
    .detail-apps-grid { grid-template-columns: repeat(2, 1fr); }
    .detail-certs-grid { grid-template-columns: repeat(2, 1fr); }
    .detail-related-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
    .detail-features-grid { grid-template-columns: 1fr 1fr; }
    .detail-tabs { overflow-x: auto; }
    .detail-tab { padding: 14px 18px; font-size: 13px; }
    .detail-cta-group { flex-direction: column; }
    .btn-outline { justify-content: center; }
    .detail-meta { flex-direction: column; gap: 10px; }
}
@media (max-width: 480px) {
    .detail-features-grid { grid-template-columns: 1fr; }
    .detail-apps-grid { grid-template-columns: repeat(2, 1fr); }
    .detail-certs-grid { grid-template-columns: 1fr 1fr; }
    .detail-related-grid { grid-template-columns: 1fr; }
}