:root {
            --rc1gu-primary: #00a150;
            --rc1gu-primary-dark: #008a44;
            --rc1gu-secondary: #1e293b;
            --rc1gu-accent: #3b82f6;
            --rc1gu-bg: #f8fafc;
            --rc1gu-text: #334155;
            --rc1gu-white: #ffffff;
            --rc1gu-glass: rgba(255, 255, 255, 0.85);
            --rc1gu-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            --rc1gu-radius: 16px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--rc1gu-bg);
            color: var(--rc1gu-text);
            line-height: 1.7;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* Layout Container */
        .rc1gu-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 5vw;
            width: 100%;
        }

        /* Navigation */
        .rc1gu-navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: var(--rc1gu-glass);
            backdrop-filter: blur(12px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            display: flex;
            align-items: center;
        }

        .rc1gu-nav-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            flex-wrap: wrap;
        }

        .rc1gu-logo {
            flex: 0 0 auto;
            min-width: 0;
        }

        .rc1gu-logo img {
            height: 32px;
            display: block;
        }

        .rc1gu-menu {
            display: flex;
            list-style: none;
            gap: 24px;
            flex-wrap: wrap;
            min-width: 0;
        }

        .rc1gu-menu a {
            text-decoration: none;
            color: var(--rc1gu-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.3s ease;
            position: relative;
        }

        .rc1gu-menu a:hover, .rc1gu-menu a.active {
            color: var(--rc1gu-primary);
        }

        .rc1gu-menu a.active::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--rc1gu-primary);
        }

        /* Hero Section - Unique Formula Explorer */
        .rc1gu-hero {
            padding: 160px 0 80px;
            background: radial-gradient(circle at top right, #e2f2e9 0%, #f8fafc 50%);
            position: relative;
            overflow: hidden;
        }

        .rc1gu-hero::before {
            content: 'f(x)';
            position: absolute;
            top: 10%;
            right: 5%;
            font-size: 20rem;
            font-weight: 900;
            color: rgba(0, 161, 80, 0.03);
            pointer-events: none;
        }

        .rc1gu-hero-grid {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .rc1gu-hero-text {
            flex: 1;
            min-width: 320px;
        }

        .rc1gu-hero-title {
            font-size: clamp(2rem, 5vw, 3.5rem);
            line-height: 1.2;
            color: var(--rc1gu-secondary);
            margin-bottom: 24px;
            font-weight: 800;
        }

        .rc1gu-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: #64748b;
            margin-bottom: 40px;
            max-width: 600px;
        }

        .rc1gu-search-box {
            background: var(--rc1gu-white);
            padding: 8px;
            border-radius: 50px;
            display: flex;
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
            max-width: 500px;
            border: 1px solid rgba(0, 161, 80, 0.2);
        }

        .rc1gu-search-box input {
            flex: 1;
            border: none;
            padding: 12px 24px;
            outline: none;
            font-size: 1rem;
            background: transparent;
        }

        .rc1gu-search-btn {
            background: var(--rc1gu-primary);
            color: white;
            border: none;
            padding: 12px 32px;
            border-radius: 50px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
        }

        .rc1gu-search-btn:hover {
            background: var(--rc1gu-primary-dark);
        }

        /* Formula Categories Grid */
        .rc1gu-section {
            padding: 80px 0;
        }

        .rc1gu-section-title {
            text-align: center;
            font-size: clamp(1.5rem, 3vw, 2.2rem);
            margin-bottom: 48px;
            color: var(--rc1gu-secondary);
        }

        .rc1gu-formula-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }

        .rc1gu-card {
            background: var(--rc1gu-white);
            padding: 32px;
            border-radius: var(--rc1gu-radius);
            box-shadow: var(--rc1gu-shadow);
            transition: transform 0.3s ease, border-color 0.3s;
            border: 1px solid transparent;
            word-break: break-word;
            min-width: 0;
        }

        .rc1gu-card:hover {
            transform: translateY(-8px);
            border-color: var(--rc1gu-primary);
        }

        .rc1gu-card-icon {
            width: 48px;
            height: 48px;
            background: #f0fdf4;
            color: var(--rc1gu-primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 1.5rem;
            font-weight: bold;
        }

        .rc1gu-card-title {
            font-size: 1.25rem;
            margin-bottom: 12px;
            color: var(--rc1gu-secondary);
        }

        .rc1gu-card-list {
            list-style: none;
            font-size: 0.9rem;
            color: #64748b;
        }

        .rc1gu-card-list li {
            margin-bottom: 8px;
            display: flex;
            align-items: center;
        }

        .rc1gu-card-list li::before {
            content: '•';
            color: var(--rc1gu-primary);
            margin-right: 8px;
            font-weight: bold;
        }

        /* Security Armor Section */
        .rc1gu-armor-bg {
            background: var(--rc1gu-secondary);
            color: var(--rc1gu-white);
            border-radius: 32px;
            padding: 64px;
            position: relative;
            overflow: hidden;
        }

        .rc1gu-armor-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 40px;
        }

        .rc1gu-armor-item {
            min-width: 0;
        }

        .rc1gu-armor-tag {
            font-size: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--rc1gu-primary);
            margin-bottom: 12px;
            display: block;
        }

        .rc1gu-armor-title {
            font-size: 1.4rem;
            margin-bottom: 16px;
        }

        .rc1gu-armor-desc {
            color: #94a3b8;
            font-size: 0.95rem;
            margin-bottom: 16px;
        }

        .rc1gu-armor-detail {
            background: rgba(255,255,255,0.05);
            padding: 12px 16px;
            border-radius: 8px;
            font-size: 0.85rem;
            border-left: 3px solid var(--rc1gu-primary);
        }

        /* Industry Workflow */
        .rc1gu-workflow-container {
            display: flex;
            flex-direction: column;
            gap: 64px;
        }

        .rc1gu-flow-row {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            align-items: center;
        }

        .rc1gu-flow-row:nth-child(even) {
            flex-direction: row-reverse;
        }

        .rc1gu-flow-content {
            flex: 1;
            min-width: 300px;
        }

        .rc1gu-flow-visual {
            flex: 1;
            min-width: 300px;
            background: #fff;
            padding: 40px;
            border-radius: 24px;
            box-shadow: var(--rc1gu-shadow);
            border: 1px solid #f1f5f9;
        }

        .rc1gu-sector-badge {
            display: inline-block;
            padding: 4px 12px;
            background: #e2f2e9;
            color: var(--rc1gu-primary-dark);
            border-radius: 4px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .rc1gu-workflow-step {
            font-size: 1.1rem;
            color: var(--rc1gu-secondary);
            margin-bottom: 16px;
            font-weight: 600;
        }

        /* Footer */
        .rc1gu-footer {
            background: #f1f5f9;
            padding: 64px 0 32px;
            margin-top: 80px;
        }

        .rc1gu-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 48px;
        }

        .rc1gu-footer-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--rc1gu-secondary);
        }

        .rc1gu-footer-links h4 {
            margin-bottom: 20px;
            font-size: 1rem;
            color: var(--rc1gu-secondary);
        }

        .rc1gu-footer-links ul {
            list-style: none;
        }

        .rc1gu-footer-links li {
            margin-bottom: 10px;
        }

        .rc1gu-footer-links a {
            text-decoration: none;
            color: #64748b;
            font-size: 0.9rem;
            transition: color 0.3s;
        }

        .rc1gu-footer-links a:hover {
            color: var(--rc1gu-primary);
        }

        .rc1gu-copyright {
            text-align: center;
            padding-top: 32px;
            border-top: 1px solid #e2e8f0;
            color: #94a3b8;
            font-size: 0.85rem;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .rc1gu-navbar { height: auto; padding: 16px 0; }
            .rc1gu-menu { display: none; } /* Simplified for mobile */
            .rc1gu-hero { padding-top: 120px; text-align: center; }
            .rc1gu-search-box { margin: 0 auto; }
            .rc1gu-armor-bg { padding: 32px; }
            .rc1gu-flow-row { gap: 24px; }
        }