:root {
            --primary: #0F4C9E;
            --primary-light: #2563EB;
            --accent: #22D3EE;
            --accent-purple: #8B5CF6;
            --accent-pink: #EC4899;
            --gold: #F59E0B;
            --bg-dark: #050B1A;
            --bg-card: rgba(15, 32, 62, 0.7);
            --gradient-blue: linear-gradient(135deg, #0F4C9E 0%, #22D3EE 100%);
            --gradient-purple: linear-gradient(135deg, #7C3AED 0%, #EC4899 100%);
        }
        * { 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;
            background: var(--bg-dark);
            color: #E2E8F0;
            overflow-x: hidden;
            line-height: 1.6;
        }
        .circuit-bg {
            background-image:
                linear-gradient(rgba(0, 240, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
            background-size: 50px 50px;
        }
        .nav-neon { box-shadow: 0 4px 30px rgba(15, 76, 158, 0.2); }
        .nav-link {
            position: relative;
            transition: all 0.15s ease;
            padding: 0.5rem 0;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0; left: 50%;
            width: 0; height: 2px;
            background: var(--gradient-blue);
            transition: all 0.15s ease;
            transform: translateX(-50%);
            box-shadow: 0 0 10px rgba(34, 211, 238, 0.5);
        }
        .nav-link:hover, .nav-link.active {
            color: var(--accent) !important;
            text-shadow: 0 0 20px rgba(34, 211, 238, 0.3);
        }
        .nav-link:hover::after, .nav-link.active::after { width: 100%; }
        .btn-primary {
            background: var(--gradient-blue);
            color: white;
            padding: 0.75rem 1.75rem;
            border-radius: 0.75rem;
            font-weight: 600;
            transition: all 0.15s ease;
            display: inline-flex;
            align-items: center;
            border: none;
            cursor: pointer;
            position: relative;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
        }
        .btn-primary::before {
            content: '';
            position: absolute;
            top: 0; left: -100%;
            width: 100%; height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: left 0.5s ease;
        }
        .btn-primary:hover::before { left: 100%; }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(37, 99, 235, 0.5);
        }
        .gradient-text {
            background: var(--gradient-blue);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .data-flow {
            background: linear-gradient(90deg, #22D3EE, #8B5CF6, #EC4899, #22D3EE);
            background-size: 300% auto;
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            animation: dataFlow 4s linear infinite;
        }
        @keyframes dataFlow {
            0% { background-position: 0% center; }
            100% { background-position: 300% center; }
        }
        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(37, 99, 235, 0.15);
            border-radius: 1rem;
            transition: all 0.15s ease;
        }
        .glass-card:hover {
            border-color: rgba(34, 211, 238, 0.4);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), 0 0 30px rgba(34, 211, 238, 0.1);
        }
        .gradient-border-card {
            position: relative;
            background: linear-gradient(135deg, rgba(15, 32, 62, 0.9) 0%, rgba(20, 42, 82, 0.85) 100%);
            border-radius: 1rem;
            z-index: 1;
        }
        .gradient-border-card::before {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: 1rem;
            padding: 1px;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.6), rgba(34, 211, 238, 0.4), rgba(139, 92, 246, 0.3));
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            pointer-events: none;
        }
        .hud-corner { position: relative; }
        .hud-corner::before, .hud-corner::after {
            content: '';
            position: absolute;
            width: 24px; height: 24px;
            border-color: var(--accent);
            border-style: solid;
            opacity: 0.7;
            transition: all 0.15s ease;
            z-index: 2;
        }
        .hud-corner::before {
            top: -1px; left: -1px;
            border-width: 2px 0 0 2px;
            border-radius: 8px 0 0 0;
        }
        .hud-corner::after {
            bottom: -1px; right: -1px;
            border-width: 0 2px 2px 0;
            border-radius: 0 0 8px 0;
        }
        .hud-corner:hover::before, .hud-corner:hover::after {
            width: 32px; height: 32px;
            opacity: 1;
            box-shadow: 0 0 15px rgba(34, 211, 238, 0.4);
        }
        .scan-line {
            position: relative;
            overflow: hidden;
        }
        @keyframes scanMove {
            0% { top: -100%; }
            100% { top: 100%; }
        }
        .glow-text {
            text-shadow: 0 0 30px rgba(34, 211, 238, 0.4), 0 0 60px rgba(34, 211, 238, 0.2);
        }
        .anim-fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.6s ease-out;
        }
        .anim-fade-up.visible { opacity: 1; transform: translateY(0); }
        .anim-fade-right {
            opacity: 0;
            transform: translateX(30px);
            transition: all 0.6s ease-out;
        }
        .anim-fade-right.visible { opacity: 1; transform: translateX(0); }
        .delay-100 { transition-delay: 0.1s; }
        .delay-200 { transition-delay: 0.2s; }
        .delay-300 { transition-delay: 0.3s; }
        .search-box {
            position: relative;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-box input {
            width: 100%;
            padding: 1.1rem 1.25rem 1.1rem 3.5rem;
            background: rgba(15, 32, 62, 0.7);
            border: 1px solid rgba(37, 99, 235, 0.3);
            border-radius: 1rem;
            color: white;
            font-size: 1rem;
            transition: all 0.15s ease;
            outline: none;
            backdrop-filter: blur(10px);
        }
        .search-box input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15), 0 0 30px rgba(34, 211, 238, 0.15);
        }
        .search-box input::placeholder { color: #64748B; }
        .search-box .search-icon {
            position: absolute;
            left: 1.25rem;
            top: 50%;
            transform: translateY(-50%);
            color: var(--accent);
            font-size: 1.1rem;
        }
        .filter-btn {
            padding: 0.5rem 1.25rem;
            border-radius: 2rem;
            font-size: 0.875rem;
            font-weight: 500;
            transition: all 0.15s ease;
            cursor: pointer;
            border: 1px solid rgba(37, 99, 235, 0.25);
            background: rgba(15, 32, 62, 0.5);
            color: #94A3B8;
        }
        .filter-btn:hover, .filter-btn.active {
            background: var(--gradient-blue);
            color: white;
            border-color: transparent;
            transform: translateY(-2px);
            box-shadow: 0 6px 25px rgba(37, 99, 235, 0.4);
        }
        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(37, 99, 235, 0.15);
            border-radius: 1rem;
            margin-bottom: 1rem;
            overflow: hidden;
            transition: all 0.15s ease;
        }
        .faq-item:hover { border-color: rgba(34, 211, 238, 0.35); }
        .faq-item.active {
            border-color: rgba(34, 211, 238, 0.5);
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3), 0 0 25px rgba(34, 211, 238, 0.1);
        }
        .faq-question {
            padding: 1.25rem 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            transition: all 0.15s ease;
            user-select: none;
        }
        .faq-question:hover { background: rgba(34, 211, 238, 0.03); }
        .faq-question-left {
            display: flex;
            align-items: center;
            gap: 1rem;
            flex: 1;
        }
        .faq-number {
            flex-shrink: 0;
            width: 36px; height: 36px;
            border-radius: 0.625rem;
            background: linear-gradient(135deg, rgba(15, 76, 158, 0.4), rgba(34, 211, 238, 0.2));
            border: 1px solid rgba(34, 211, 238, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.875rem;
            font-weight: 700;
            color: var(--accent);
        }
        .faq-item.active .faq-number {
            background: var(--gradient-blue);
            color: white;
            box-shadow: 0 0 15px rgba(34, 211, 238, 0.4);
        }
        .faq-question-text {
            font-size: 1rem;
            font-weight: 600;
            color: #E2E8F0;
            line-height: 1.5;
        }
        .faq-item.active .faq-question-text { color: var(--accent); }
        .faq-toggle {
            flex-shrink: 0;
            width: 32px; height: 32px;
            border-radius: 0.5rem;
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            transition: all 0.15s ease;
            margin-left: 1rem;
        }
        .faq-item.active .faq-toggle {
            background: var(--gradient-blue);
            color: white;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
        }
        .faq-item.active .faq-answer { max-height: 600px; }
        .faq-answer-inner {
            padding: 0 1.5rem 1.5rem 5.25rem;
            color: #94A3B8;
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .faq-answer-inner p { margin-bottom: 0.75rem; }
        .faq-answer-inner p:last-child { margin-bottom: 0; }
        .faq-answer-inner ul, .faq-answer-inner ol {
            padding-left: 1.25rem;
            margin-bottom: 0.75rem;
        }
        .faq-answer-inner li { margin-bottom: 0.375rem; }
        .faq-answer-inner strong { color: #CBD5E1; }
        .faq-category-label {
            display: inline-block;
            padding: 0.2rem 0.625rem;
            border-radius: 0.375rem;
            font-size: 0.7rem;
            font-weight: 600;
            margin-left: 0.75rem;
            vertical-align: middle;
        }
        .cat-product { background: rgba(34, 211, 238, 0.15); color: #67E8F9; border: 1px solid rgba(34, 211, 238, 0.3); }
        .cat-tech { background: rgba(139, 92, 246, 0.15); color: #C4B5FD; border: 1px solid rgba(139, 92, 246, 0.3); }
        .cat-coop { background: rgba(245, 158, 11, 0.15); color: #FCD34D; border: 1px solid rgba(245, 158, 11, 0.3); }
        .cat-service { background: rgba(16, 185, 129, 0.15); color: #6EE7B7; border: 1px solid rgba(16, 185, 129, 0.3); }
        .hud-panel {
            background: linear-gradient(135deg, rgba(15, 32, 62, 0.8) 0%, rgba(20, 42, 82, 0.6) 100%);
            border: 1px solid rgba(34, 211, 238, 0.2);
            border-radius: 0.75rem;
            padding: 0.75rem 1rem;
            position: relative;
            overflow: hidden;
        }
        .hud-panel::before {
            content: '';
            position: absolute;
            top: 0; left: 0;
            width: 3px; height: 100%;
            background: var(--gradient-blue);
        }
        .hot-question-item {
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            padding: 0.875rem 0;
            border-bottom: 1px solid rgba(37, 99, 235, 0.12);
            cursor: pointer;
            transition: all 0.15s ease;
        }
        .hot-question-item:last-child { border-bottom: none; }
        .hot-question-item:hover {
            padding-left: 0.5rem;
            background: rgba(34, 211, 238, 0.03);
        }
        .hot-question-item:hover .hot-q-text { color: var(--accent); }
        .hot-q-icon {
            flex-shrink: 0;
            width: 24px; height: 24px;
            border-radius: 0.375rem;
            background: rgba(245, 158, 11, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FBBF24;
            font-size: 0.7rem;
            margin-top: 0.125rem;
        }
        .hot-q-text {
            font-size: 0.875rem;
            color: #CBD5E1;
            line-height: 1.5;
            transition: color 0.15s ease;
        }
        .footer-nav-col h4 {
            color: white;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 1.25rem;
        }
        .footer-nav-col ul { list-style: none; padding: 0; }
        .footer-nav-col li { margin-bottom: 0.625rem; }
        .footer-nav-col a {
            color: #94A3B8;
            font-size: 0.875rem;
            transition: all 0.15s ease;
            text-decoration: none;
        }
        .footer-nav-col a:hover {
            color: var(--accent);
            padding-left: 4px;
            text-shadow: 0 0 10px rgba(34, 211, 238, 0.3);
        }
        #particles-canvas {
            position: absolute;
            top: 0; left: 0;
            width: 100%; height: 100%;
            pointer-events: none;
            z-index: 1;
        }
        @media (max-width: 768px) {
            .search-box { max-width: 100%; }
            .faq-answer-inner { padding-left: 1.5rem; }
            .faq-question-text { font-size: 0.95rem; }
        }