:root {
            --industrial-blue: #25bdff;
            --electric-blue: #1e50e6;
            --bright-blue: #3366ff;
            --cyan-glow: #00d4ff;
            --dark-blue: #0a1628;
            --darker-blue: #060d18;
            --white: #ffffff;
            --gray-100: #f8fafc;
            --gray-200: #e2e8f0;
            --gray-300: #cbd5e1;
            --gray-400: #94a3b8;
            --gray-600: #475569;
            --gray-800: #1e293b;
            --gradient-primary: linear-gradient(135deg, var(--electric-blue) 0%, var(--industrial-blue) 100%);
            --gradient-bright: linear-gradient(135deg, #1e50e6 0%, #00d4ff 50%, #25bdff 100%);
            --gradient-border: linear-gradient(135deg, var(--electric-blue), var(--cyan-glow), var(--industrial-blue));
            --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-weight: 400; color: var(--gray-800); background: var(--gray-100); line-height: 1.6; overflow-x: hidden; }
        h1, h2, h3, h4, h5, h6 { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-weight: 600; text-transform: uppercase; letter-spacing: 0.02em; }

        /* ===== NAVIGATION ===== */
        .nav { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; padding: 0 80px; height: 80px; display: flex; align-items: center; justify-content: space-between; transition: all 0.4s var(--transition-smooth); }
        .nav.transparent { background: transparent; }
        .nav.scrolled { background: rgba(255, 255, 255, 0.98); backdrop-filter: blur(20px); box-shadow: 0 2px 40px rgba(30, 80, 230, 0.08); }
        .nav.scrolled .nav-logo { color: var(--dark-blue); }
        .nav.scrolled .nav-link { color: var(--gray-800); }
        .nav.scrolled .nav-link:hover { color: var(--electric-blue); }
        .nav.scrolled .nav-cta { background: var(--electric-blue); color: var(--white); border-color: transparent; }
        .nav-logo { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-size: 24px; font-weight: 700; color: var(--white); text-decoration: none; letter-spacing: 0.1em; display: flex; align-items: center; gap: 12px; transition: color 0.4s var(--transition-smooth); }
        .nav-logo-icon { width: 40px; height: 40px; background: linear-gradient(135deg, #1e50e6, #25bdff); border-radius: 6px; display: flex; align-items: center; justify-content: center; color: white; font-size: 16px; font-weight: bold; flex-shrink: 0; }
        .nav-menu { display: flex; align-items: center; gap: 40px; list-style: none; }
        .nav-link { font-size: 13px; font-weight: 500; color: var(--white); text-decoration: none; text-transform: uppercase; letter-spacing: 0.08em; transition: all 0.3s var(--transition-smooth); position: relative; }
        .nav-link::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px; background: var(--gradient-bright); transition: width 0.3s var(--transition-smooth); }
        .nav-link:hover::after, .nav-link.active::after { width: 100%; }
        .nav-cta { padding: 12px 28px; background: transparent; border: 1px solid rgba(255, 255, 255, 0.4); color: var(--white); font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; cursor: pointer; transition: all 0.3s var(--transition-smooth); text-decoration: none; border-radius: 4px; }
        .nav-cta:hover { background: var(--white); color: var(--dark-blue); border-color: var(--white); }
        .nav.scrolled .nav-cta:hover { background: #1a44c4; color: var(--white); }
        .nav-actions { display: flex; align-items: center; gap: 16px; }
        .lang-switcher { position: relative; }
        .lang-btn { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.2); border-radius: 50%; cursor: pointer; transition: all 0.3s var(--transition-smooth); }
        .lang-btn svg { width: 18px; height: 18px; stroke: var(--white); stroke-width: 1.5; fill: none; }
        .lang-btn:hover { background: rgba(255,255,255,0.2); }
        .nav.scrolled .lang-btn { background: var(--gray-100); border-color: var(--gray-200); }
        .nav.scrolled .lang-btn svg { stroke: var(--gray-600); }
        .nav.scrolled .lang-btn:hover { background: var(--electric-blue); border-color: var(--electric-blue); }
        .nav.scrolled .lang-btn:hover svg { stroke: var(--white); }
        .lang-dropdown { position: absolute; top: calc(100% + 10px); right: 0; min-width: 140px; background: var(--white); border-radius: 10px; padding: 8px; opacity: 0; visibility: hidden; transform: translateY(-10px); transition: all 0.3s var(--transition-smooth); box-shadow: 0 10px 40px rgba(0,0,0,0.15); z-index: 100; }
        .lang-switcher:hover .lang-dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
        .lang-option { display: block; padding: 10px 14px; font-size: 13px; color: var(--gray-600); border-radius: 6px; text-decoration: none; transition: all 0.2s ease; cursor: pointer; }
        .lang-option:hover { background: var(--gray-100); color: var(--gray-800); }
        .lang-option.active { color: var(--electric-blue); font-weight: 500; }
        .mobile-menu { position: fixed; top: 0; left: 0; width: 100%; height: 100vh; background: linear-gradient(135deg, var(--dark-blue) 0%, var(--darker-blue) 100%); z-index: 99; display: flex; flex-direction: column; justify-content: center; align-items: center; opacity: 0; visibility: hidden; transition: all 0.4s var(--transition-smooth); }
        .mobile-menu.active { opacity: 1; visibility: visible; }
        .mobile-nav-list { list-style: none; text-align: center; }
        .mobile-nav-link { display: block; font-size: 22px; font-weight: 300; color: var(--white); letter-spacing: 0.08em; padding: 16px 0; text-decoration: none; opacity: 0; transform: translateY(20px); transition: all 0.4s var(--transition-smooth); }
        .mobile-menu.active .mobile-nav-link { opacity: 1; transform: translateY(0); }
        .mobile-menu.active .mobile-nav-link:nth-child(1) { transition-delay: 0.1s; }
        .mobile-menu.active .mobile-nav-link:nth-child(2) { transition-delay: 0.15s; }
        .mobile-menu.active .mobile-nav-link:nth-child(3) { transition-delay: 0.2s; }
        .mobile-menu.active .mobile-nav-link:nth-child(4) { transition-delay: 0.25s; }
        .mobile-menu.active .mobile-nav-link:nth-child(5) { transition-delay: 0.3s; }
        .mobile-nav-link:hover { color: var(--cyan-glow); }
        .nav-mobile-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; z-index: 101; position: relative; }
        .nav-mobile-toggle span { width: 24px; height: 2px; background: var(--white); transition: all 0.3s ease; }
        .nav.scrolled .nav-mobile-toggle span { background: var(--dark-blue); }
        .nav-mobile-toggle.active span { background: var(--white) !important; }
        .nav-mobile-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
        .nav-mobile-toggle.active span:nth-child(2) { opacity: 0; }
        .nav-mobile-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

        /* ===== PAGE HERO ===== */
        .page-hero { position: relative; min-height: 480px; background: linear-gradient(135deg, #1e50e6 0%, #0a1628 60%, #0d2040 100%); display: flex; align-items: flex-end; padding: 0 80px 80px; overflow: hidden; }
        .page-hero-pattern { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background-image: linear-gradient(rgba(37, 189, 255, 0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(37, 189, 255, 0.06) 1px, transparent 1px); background-size: 60px 60px; pointer-events: none; }
        .page-hero-glow { position: absolute; width: 800px; height: 800px; top: -300px; right: -200px; background: radial-gradient(circle, rgba(30, 80, 230, 0.3) 0%, rgba(0, 212, 255, 0.15) 40%, transparent 70%); pointer-events: none; }
        .page-hero-content { position: relative; z-index: 10; max-width: 1600px; margin: 0 auto; width: 100%; }
        .page-hero-title { font-size: clamp(40px, 6vw, 72px); color: var(--white); line-height: 1.1; margin-bottom: 24px; }
        .page-hero-desc { font-size: 18px; color: rgba(255, 255, 255, 0.7); max-width: 680px; line-height: 1.8; }

        /* ===== PREMIUM BREADCRUMB ===== */
        .breadcrumb-wrapper {
            position: relative;
            margin-bottom: 40px;
        }
        
        .breadcrumb {
            display: inline-flex;
            align-items: center;
            gap: 0;
            padding: 16px 28px;
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 60px;
            position: relative;
            overflow: hidden;
        }
        
        .breadcrumb::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(90deg, rgba(30, 80, 230, 0.1) 0%, rgba(0, 212, 255, 0.05) 50%, rgba(37, 189, 255, 0.1) 100%);
            opacity: 0;
            transition: opacity 0.4s ease;
        }
        
        .breadcrumb:hover::before {
            opacity: 1;
        }
        
        .breadcrumb-item {
            display: flex;
            align-items: center;
            gap: 8px;
            position: relative;
            z-index: 1;
        }
        
        .breadcrumb-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.03em;
            padding: 6px 12px;
            border-radius: 20px;
            transition: all 0.3s var(--transition-smooth);
            position: relative;
        }
        
        .breadcrumb-link svg {
            width: 16px;
            height: 16px;
            stroke: currentColor;
            stroke-width: 2;
            fill: none;
            transition: transform 0.3s ease;
        }
        
        .breadcrumb-link:hover {
            color: var(--white);
            background: rgba(255, 255, 255, 0.1);
        }
        
        .breadcrumb-link:hover svg {
            transform: scale(1.1);
        }
        
        .breadcrumb-separator {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            color: rgba(255, 255, 255, 0.25);
            position: relative;
        }
        
        .breadcrumb-separator svg {
            width: 14px;
            height: 14px;
            stroke: currentColor;
            stroke-width: 2;
            fill: none;
        }
        
        .breadcrumb-separator::before {
            content: '';
            position: absolute;
            width: 4px;
            height: 4px;
            background: var(--cyan-glow);
            border-radius: 50%;
            opacity: 0;
            animation: separatorPulse 2s ease-in-out infinite;
        }
        
        @keyframes separatorPulse {
            0%, 100% { opacity: 0; transform: scale(0.5); }
            50% { opacity: 0.6; transform: scale(1); }
        }
        
        .breadcrumb-current {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--white);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.05em;
            padding: 8px 16px;
            background: linear-gradient(135deg, rgba(30, 80, 230, 0.4) 0%, rgba(0, 212, 255, 0.2) 100%);
            border: 1px solid rgba(0, 212, 255, 0.3);
            border-radius: 20px;
            position: relative;
            overflow: hidden;
        }
        
        .breadcrumb-current::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            animation: shimmer 3s infinite;
        }
        
        @keyframes shimmer {
            0% { left: -100%; }
            100% { left: 100%; }
        }
        
        .breadcrumb-current-icon {
            width: 18px;
            height: 18px;
            background: var(--cyan-glow);
            border-radius: 4px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .breadcrumb-current-icon svg {
            width: 12px;
            height: 12px;
            stroke: var(--dark-blue);
            stroke-width: 2.5;
            fill: none;
        }

        /* ===== SECTIONS COMMON ===== */
        .section { padding: 100px 80px; }
        .section-container { max-width: 1600px; margin: 0 auto; width: 100%; }
        .section-header { margin-bottom: 60px; }
        .section-header.center { text-align: center; }
        .section-header.center .section-desc { margin: 0 auto; }
        .section-label { font-size: 12px; font-weight: 600; color: var(--electric-blue); text-transform: uppercase; letter-spacing: 0.2em; margin-bottom: 16px; display: inline-flex; align-items: center; gap: 12px; }
        .section-label::before { content: ''; width: 32px; height: 2px; background: var(--gradient-primary); }
        .section-title { font-size: clamp(32px, 4vw, 48px); color: var(--dark-blue); line-height: 1.15; margin-bottom: 20px; }
        .section-desc { font-size: 17px; color: var(--gray-600); max-width: 640px; line-height: 1.8; }

        /* Animation Classes */
        .reveal { opacity: 0; transform: translateY(48px); transition: all 0.7s var(--transition-smooth); }
        .reveal.visible { opacity: 1; transform: translateY(0); }
        .reveal-delay-1 { transition-delay: 0.1s; }
        .reveal-delay-2 { transition-delay: 0.2s; }
        .reveal-delay-3 { transition-delay: 0.3s; }
        .reveal-delay-4 { transition-delay: 0.4s; }

        /* ===== CATEGORY FILTER ===== */
        .category-filter { background: var(--white); padding: 24px 80px; position: sticky; top: 80px; z-index: 100; box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05); }
        .filter-container { max-width: 1600px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; }
        .filter-tabs { display: flex; gap: 8px; }
        .filter-tab { padding: 14px 28px; background: var(--gray-100); border: none; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-size: 14px; font-weight: 500; color: var(--gray-600); cursor: pointer; transition: all 0.3s var(--transition-smooth); border-radius: 12px; }
        .filter-tab:hover { color: var(--electric-blue); background: rgba(30, 80, 230, 0.08); }
        .filter-tab.active { background: var(--electric-blue); color: var(--white); font-weight: 600; box-shadow: 0 4px 15px rgba(30, 80, 230, 0.3); }
        .filter-search { display: flex; align-items: center; gap: 12px; padding: 12px 20px; background: var(--gray-100); border-radius: 12px; width: 280px; }
        .filter-search svg { width: 20px; height: 20px; stroke: var(--gray-400); stroke-width: 2; fill: none; }
        .filter-search input { flex: 1; border: none; background: none; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-size: 14px; color: var(--gray-800); outline: none; }
        .filter-search input::placeholder { color: var(--gray-400); }

        /* Mobile Filter */
        .filter-mobile-toggle { display: none; align-items: center; justify-content: space-between; width: 100%; padding: 14px 20px; background: var(--gray-100); border: none; border-radius: 12px; cursor: pointer; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-size: 14px; font-weight: 500; color: var(--gray-800); }
        .filter-mobile-toggle svg { width: 20px; height: 20px; stroke: var(--gray-600); stroke-width: 2; fill: none; transition: transform 0.3s ease; }
        .filter-mobile-toggle.active svg { transform: rotate(180deg); }
        .filter-mobile-toggle .current-filter { display: flex; align-items: center; gap: 10px; }
        .filter-mobile-toggle .filter-icon { width: 18px; height: 18px; stroke: var(--electric-blue); }
        .filter-drawer { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--white); border-top: 1px solid var(--gray-200); box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1); padding: 20px; z-index: 99; }
        .filter-drawer.open { display: block; animation: slideDown 0.3s ease; }
        @keyframes slideDown { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }
        .filter-drawer-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
        .filter-drawer-item { padding: 14px 16px; background: var(--gray-100); border: 2px solid transparent; border-radius: 10px; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-size: 14px; color: var(--gray-600); cursor: pointer; transition: all 0.3s ease; text-align: center; }
        .filter-drawer-item:hover { border-color: var(--electric-blue); color: var(--electric-blue); }
        .filter-drawer-item.active { background: var(--electric-blue); color: var(--white); border-color: var(--electric-blue); }
        .filter-drawer-search { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--gray-200); }
        .filter-drawer-search .filter-search { width: 100%; }

        /* Filter Result Styles */
        .product-card.filtered-out { display: none !important; }
        .product-card.filter-show { animation: filterIn 0.4s ease forwards; }
        @keyframes filterIn { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }
        .no-results { display: none; grid-column: 1 / -1; text-align: center; padding: 80px 40px; background: var(--white); border-radius: 20px; border: 2px dashed var(--gray-200); }
        .no-results.show { display: block; }
        .no-results-icon { width: 80px; height: 80px; margin: 0 auto 24px; stroke: var(--gray-300); stroke-width: 1.5; fill: none; }
        .no-results-title { font-size: 24px; color: var(--gray-800); margin-bottom: 12px; }
        .no-results-desc { font-size: 16px; color: var(--gray-500); margin-bottom: 24px; }
        .no-results-btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 24px; background: var(--electric-blue); color: var(--white); border: none; border-radius: 10px; font-size: 14px; font-weight: 500; cursor: pointer; transition: all 0.3s ease; }
        .no-results-btn:hover { background: #1a44c4; transform: translateY(-2px); }
        .filter-count { display: inline-flex; align-items: center; justify-content: center; min-width: 24px; height: 24px; padding: 0 8px; background: rgba(255,255,255,0.2); border-radius: 12px; font-size: 12px; font-weight: 600; margin-left: 8px; }
        .filter-tab.active .filter-count { background: rgba(255,255,255,0.3); }

        /* ===== FEATURED PRODUCTS ===== */
        .featured { background: var(--white); padding-top: 80px; }
        .featured-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
        .featured-card { display: grid; grid-template-columns: 1fr 1fr; background: var(--gray-100); border-radius: 24px; overflow: hidden; transition: all 0.5s var(--transition-smooth); position: relative; }
        .featured-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; border-radius: 24px; padding: 2px; background: linear-gradient(135deg, transparent, transparent); -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0); -webkit-mask-composite: xor; mask-composite: exclude; opacity: 0; transition: all 0.5s var(--transition-smooth); pointer-events: none; z-index: 10; }
        .featured-card:hover::before { background: var(--gradient-border); opacity: 1; }
        .featured-card:hover { transform: translateY(-8px); box-shadow: 0 30px 60px rgba(30, 80, 230, 0.12); }
        .featured-image { height: 100%; min-height: 320px; position: relative; overflow: hidden; }
        .featured-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--transition-smooth); }
        .featured-card:hover .featured-image img { transform: scale(1.05); }
        .featured-badge { position: absolute; top: 20px; left: 20px; padding: 8px 16px; background: var(--electric-blue); font-size: 11px; font-weight: 600; color: var(--white); text-transform: uppercase; letter-spacing: 0.1em; border-radius: 8px; z-index: 5; }
        .featured-content { padding: 40px; display: flex; flex-direction: column; justify-content: center; }
        .featured-category { font-size: 12px; font-weight: 600; color: var(--electric-blue); text-transform: uppercase; letter-spacing: 0.15em; margin-bottom: 12px; }
        .featured-title { font-size: 24px; color: var(--dark-blue); margin-bottom: 16px; text-transform: none; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-weight: 600; }
        .featured-desc { font-size: 14px; color: var(--gray-600); line-height: 1.7; margin-bottom: 24px; }
        .featured-specs { display: flex; gap: 24px; padding-top: 20px; border-top: 1px solid var(--gray-200); margin-bottom: 24px; }
        .featured-spec { display: flex; flex-direction: column; gap: 4px; }
        .featured-spec-value { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-size: 22px; color: var(--electric-blue); }
        .featured-spec-label { font-size: 11px; color: var(--gray-400); text-transform: uppercase; letter-spacing: 0.05em; }
        .featured-link { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600; color: var(--electric-blue); text-decoration: none; text-transform: uppercase; letter-spacing: 0.08em; transition: gap 0.3s ease; }
        .featured-link:hover { gap: 12px; }
        .featured-link svg { width: 16px; height: 16px; stroke: currentColor; stroke-width: 2; fill: none; }

        /* ===== PRODUCTS GRID ===== */
        .products { background: var(--gray-100); }
        .products-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
        .product-card { background: var(--white); border-radius: 20px; overflow: hidden; transition: all 0.5s var(--transition-smooth); position: relative; box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05); }
        .product-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; border-radius: 20px; padding: 2px; background: linear-gradient(135deg, transparent, transparent); -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0); -webkit-mask-composite: xor; mask-composite: exclude; opacity: 0; transition: all 0.5s var(--transition-smooth); pointer-events: none; z-index: 10; }
        .product-card:hover::before { background: var(--gradient-border); opacity: 1; }
        .product-card:hover { transform: translateY(-8px); box-shadow: 0 25px 50px rgba(30, 80, 230, 0.12); }
        .product-image { aspect-ratio: 1/1; background: var(--gray-100); position: relative; overflow: hidden; }
        .product-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s var(--transition-smooth); }
        .product-card:hover .product-image img { transform: scale(1.05); }
        .product-tag { position: absolute; top: 16px; right: 16px; padding: 6px 12px; background: rgba(30, 80, 230, 0.9); backdrop-filter: blur(10px); font-size: 10px; font-weight: 600; color: var(--white); text-transform: uppercase; letter-spacing: 0.1em; border-radius: 6px; }
        .product-tag.new { background: rgba(0, 212, 255, 0.9); }
        .product-tag.hot { background: rgba(255, 100, 100, 0.9); }
        .product-content { padding: 24px; }
        .product-series { font-size: 11px; font-weight: 600; color: var(--electric-blue); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 8px; }
        .product-name { font-size: 17px; color: var(--dark-blue); margin-bottom: 10px; text-transform: none; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-weight: 600; line-height: 1.3; }
        .product-brief { font-size: 13px; color: var(--gray-600); line-height: 1.6; margin-bottom: 16px; }
        .product-params { display: flex; gap: 16px; padding-top: 16px; border-top: 1px solid var(--gray-200); }
        .product-param { flex: 1; text-align: center; }
        .product-param-value { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-size: 16px; color: var(--dark-blue); margin-bottom: 2px; }
        .product-param-label { font-size: 10px; color: var(--gray-400); text-transform: uppercase; }

        /* ===== SERIES SECTION ===== */
        .series { background: var(--white); }
        .series-list { display: flex; flex-direction: column; gap: 32px; }
        .series-item { display: grid; grid-template-columns: 480px 1fr; gap: 60px; padding: 48px; background: var(--gray-100); border-radius: 24px; transition: all 0.5s var(--transition-smooth); position: relative; overflow: hidden; }
        .series-item:nth-child(even) { grid-template-columns: 1fr 480px; }
        .series-item:nth-child(even) .series-image { order: 2; }
        .series-item:hover { box-shadow: 0 20px 50px rgba(30, 80, 230, 0.08); }
        .series-image { border-radius: 16px; overflow: hidden; }
        .series-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--transition-smooth); }
        .series-item:hover .series-image img { transform: scale(1.03); }
        .series-content { display: flex; flex-direction: column; justify-content: center; }
        .series-badge { display: inline-flex; padding: 8px 16px; background: var(--electric-blue); font-size: 11px; font-weight: 600; color: var(--white); text-transform: uppercase; letter-spacing: 0.1em; border-radius: 6px; margin-bottom: 20px; width: fit-content; }
        .series-title { font-size: 32px; color: var(--dark-blue); margin-bottom: 16px; text-transform: none; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-weight: 600; }
        .series-desc { font-size: 15px; color: var(--gray-600); line-height: 1.8; margin-bottom: 28px; }
        .series-features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-bottom: 28px; }
        .series-feature { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--gray-800); }
        .series-feature svg { width: 20px; height: 20px; stroke: var(--electric-blue); stroke-width: 2; fill: none; flex-shrink: 0; }
        .series-link { display: inline-flex; align-items: center; gap: 10px; padding: 14px 28px; background: var(--electric-blue); color: var(--white); text-decoration: none; font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; border-radius: 10px; transition: all 0.3s var(--transition-smooth); width: fit-content; }
        .series-link:hover { background: #1a44c4; gap: 14px; }
        .series-link svg { width: 16px; height: 16px; stroke: currentColor; stroke-width: 2; fill: none; }

        /* ===== ADVANTAGES ===== */
        .advantages { background: var(--gray-100); }
        .adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .adv-card { padding: 36px; background: var(--white); border-radius: 20px; transition: all 0.4s var(--transition-smooth); }
        .adv-card:hover { transform: translateY(-6px); box-shadow: 0 20px 40px rgba(30, 80, 230, 0.08); }
        .adv-icon { width: 56px; height: 56px; background: var(--gradient-primary); border-radius: 14px; display: flex; align-items: center; justify-content: center; margin-bottom: 24px; }
        .adv-icon svg { width: 28px; height: 28px; stroke: var(--white); stroke-width: 2; fill: none; }
        .adv-title { font-size: 18px; color: var(--dark-blue); margin-bottom: 12px; text-transform: none; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-weight: 600; }
        .adv-desc { font-size: 14px; color: var(--gray-600); line-height: 1.7; }

        /* ===== SUPPORT SECTION ===== */
        .support { background: var(--white); }
        .support-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
        .support-card { display: flex; gap: 20px; padding: 32px; background: var(--gray-100); border-radius: 20px; transition: all 0.4s var(--transition-smooth); }
        .support-card:hover { background: var(--white); box-shadow: 0 15px 40px rgba(30, 80, 230, 0.08); }
        .support-icon { width: 60px; height: 60px; background: var(--gradient-primary); border-radius: 16px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
        .support-icon svg { width: 28px; height: 28px; stroke: var(--white); stroke-width: 2; fill: none; }
        .support-content h3 { font-size: 18px; color: var(--dark-blue); margin-bottom: 8px; text-transform: none; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-weight: 600; }
        .support-content p { font-size: 14px; color: var(--gray-600); line-height: 1.6; }

        /* ===== CTA SECTION ===== */
        .cta-section { background: linear-gradient(135deg, #1e50e6 0%, #0a1628 60%, #0d2040 100%); padding: 100px 80px; position: relative; overflow: hidden; }
        .cta-pattern { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background-image: linear-gradient(rgba(37, 189, 255, 0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(37, 189, 255, 0.06) 1px, transparent 1px); background-size: 60px 60px; pointer-events: none; }
        .cta-card { position: relative; z-index: 10; max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1fr auto; gap: 60px; align-items: center; padding: 60px; background: rgba(255, 255, 255, 0.05); backdrop-filter: blur(20px); border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 24px; }
        .cta-content h2 { font-size: clamp(32px, 4vw, 44px); color: var(--white); margin-bottom: 16px; text-transform: none; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-weight: 600; }
        .cta-content h2 span { background: linear-gradient(135deg, #00d4ff 0%, #25bdff 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .cta-content p { font-size: 17px; color: rgba(255, 255, 255, 0.7); line-height: 1.8; }
        .cta-actions { display: flex; flex-direction: column; gap: 16px; }
        .cta-btn { padding: 18px 36px; font-size: 14px; font-weight: 600; text-decoration: none; text-transform: uppercase; letter-spacing: 0.1em; border-radius: 12px; transition: all 0.3s ease; }
        .cta-btn.primary { background: var(--electric-blue); color: var(--white); }
        .cta-btn.primary:hover { background: #1a44c4; box-shadow: 0 10px 30px rgba(30, 80, 230, 0.4); transform: translateY(-2px); }
        .cta-btn.secondary { background: rgba(255, 255, 255, 0.1); color: var(--white); border: 1px solid rgba(255, 255, 255, 0.2); }
        .cta-btn.secondary:hover { background: rgba(255, 255, 255, 0.15); border-color: rgba(255, 255, 255, 0.4); }

        /* ===== FOOTER ===== */
        .footer { background: var(--darker-blue); padding: 80px 80px 40px; }
        .footer-container { max-width: 1600px; margin: 0 auto; }
        .footer-grid { display: grid; grid-template-columns: 1.5fr repeat(4, 1fr); gap: 60px; margin-bottom: 60px; }
        .footer-brand { max-width: 300px; }
        .footer-logo { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-size: 24px; font-weight: 700; color: var(--white); letter-spacing: 0.1em; display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
        .footer-logo-icon { width: 40px; height: 40px; background: linear-gradient(135deg, #1e50e6, #25bdff); border-radius: 6px; display: flex; align-items: center; justify-content: center; color: white; font-size: 16px; font-weight: bold; flex-shrink: 0; }
        .footer-desc { font-size: 14px; color: var(--gray-400); line-height: 1.8; margin-bottom: 24px; }
        .footer-contact-info { font-size: 14px; color: rgba(255,255,255,0.7); line-height: 2; }
        .footer-contact-item { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 8px; }
        .footer-contact-item svg { width: 18px; height: 18px; flex-shrink: 0; margin-top: 2px; stroke: currentColor; stroke-width: 2; fill: none; }
        .footer-contact-item.wechat svg { fill: currentColor; stroke: none; }
        .footer-column-title { font-size: 14px; font-weight: 600; color: var(--white); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 24px; }
        .footer-links { list-style: none; display: flex; flex-direction: column; gap: 12px; }
        .footer-links a { font-size: 14px; color: var(--gray-400); text-decoration: none; transition: all 0.3s var(--transition-smooth); }
        .footer-links a:hover { color: var(--cyan-glow); }
        .footer-bottom { padding-top: 40px; border-top: 1px solid rgba(255,255,255,0.1); display: flex; justify-content: space-between; align-items: center; }
        .footer-copyright { font-size: 13px; color: var(--gray-400); }
        .footer-legal { display: flex; gap: 32px; }
        .footer-legal a { font-size: 13px; color: var(--gray-400); text-decoration: none; transition: color 0.3s var(--transition-smooth); }
        .footer-legal a:hover { color: var(--cyan-glow); }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 1400px) {
            .products-grid { grid-template-columns: repeat(3, 1fr); }
            .adv-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 1200px) {
            .nav { padding: 0 40px; }
            .page-hero { padding: 0 40px 60px; }
            .section { padding: 80px 40px; }
            .category-filter { padding: 20px 40px; }
            .featured-grid { grid-template-columns: 1fr; }
            .series-item { grid-template-columns: 400px 1fr; gap: 40px; padding: 36px; }
            .series-item:nth-child(even) { grid-template-columns: 1fr 400px; }
            .support-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(3, 1fr); }
        }
        @media (max-width: 992px) {
            .nav-menu { display: none; }
            .nav-cta { display: none; }
            .nav-mobile-toggle { display: flex; }
            .filter-tabs { display: none; }
            .filter-mobile-toggle { display: flex; }
            .filter-search { display: none; }
            .series-item, .series-item:nth-child(even) { grid-template-columns: 1fr; }
            .series-item:nth-child(even) .series-image { order: 0; }
            .series-image { height: 240px; }
            .cta-card { grid-template-columns: 1fr; padding: 48px; }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .nav { padding: 0 20px; height: 64px; }
            .page-hero { padding: 80px 20px 40px; min-height: 320px; }
            .section { padding: 60px 20px; }
            .category-filter { padding: 16px 20px; top: 64px; }
            .products-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .adv-grid { grid-template-columns: 1fr; }
            .support-grid { grid-template-columns: 1fr; }
            .series-features { grid-template-columns: 1fr; }
            .cta-card { padding: 32px 24px; }
            .cta-actions { flex-direction: column; }
            .cta-btn { text-align: center; }
            .footer { padding: 50px 20px 24px; }
            .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 24px 16px; }
            .footer-brand { grid-column: 1 / -1; max-width: 100%; }
            .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
            .footer-legal { flex-wrap: wrap; justify-content: center; gap: 20px; }
            .lang-btn { width: 36px; height: 36px; }
            .mobile-nav-link { font-size: 20px; padding: 14px 0; }
            .breadcrumb { padding: 8px 14px; flex-wrap: wrap; border-radius: 10px; }
            .breadcrumb-link { padding: 3px 6px; font-size: 11px; }
            .breadcrumb-link svg { width: 12px; height: 12px; }
            .breadcrumb-current { padding: 4px 8px; font-size: 11px; }
            .breadcrumb-current-icon { width: 14px; height: 14px; }
            .breadcrumb-current-icon svg { width: 9px; height: 9px; }
            .breadcrumb-separator { width: 18px; height: 18px; }
            .breadcrumb-separator svg { width: 10px; height: 10px; }
            .breadcrumb-wrapper { margin-bottom: 20px; }
            .cta-section { padding: 60px 20px; }
        }
        @media (max-width: 480px) {
            .nav { padding: 0 16px; height: 60px; }