:root {
            --ztdk-primary: #4285F4;
            --ztdk-red: #EA4335;
            --ztdk-yellow: #FBBC05;
            --ztdk-green: #34A853;
            --ztdk-text: #202124;
            --ztdk-text-light: #5f6368;
            --ztdk-bg: #ffffff;
            --ztdk-bg-alt: #f8f9fa;
            --ztdk-card-shadow: 0 4px 20px rgba(0,0,0,0.08);
            --ztdk-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            color: var(--ztdk-text);
            background-color: var(--ztdk-bg);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: break-word;
        }

        /* Layout Containers */
        .ztdk-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Navigation */
        .ztdk-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: var(--ztdk-transition);
        }

        .ztdk-nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            flex-wrap: wrap;
        }

        .ztdk-logo {
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .ztdk-logo img {
            height: 32px;
            width: auto;
        }

        .ztdk-menu {
            display: flex;
            list-style: none;
            gap: 8px;
            flex-wrap: wrap;
        }

        .ztdk-menu-item a {
            text-decoration: none;
            color: var(--ztdk-text-light);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 20px;
            transition: var(--ztdk-transition);
            position: relative;
            overflow: hidden;
        }

        /* Dynamic Light Trail Effect */
        .ztdk-menu-item a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: -100%;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--ztdk-primary), var(--ztdk-red), var(--ztdk-yellow), var(--ztdk-green), transparent);
            transition: var(--ztdk-transition);
        }

        .ztdk-menu-item a:hover {
            color: var(--ztdk-primary);
            background: rgba(66, 133, 244, 0.05);
        }

        .ztdk-menu-item a:hover::after {
            left: 100%;
        }

        .ztdk-menu-item a.ztdk-active {
            color: var(--ztdk-primary);
            background: rgba(66, 133, 244, 0.1);
        }

        /* Hero Section - Laboratory Aesthetic */
        .ztdk-hero {
            padding: 160px 0 80px;
            background: radial-gradient(circle at 90% 10%, rgba(66, 133, 244, 0.05) 0%, transparent 40%),
                        radial-gradient(circle at 10% 90%, rgba(52, 168, 83, 0.05) 0%, transparent 40%);
            text-align: center;
        }

        .ztdk-hero-content {
            max-width: 900px;
            margin: 0 auto;
        }

        .ztdk-badge {
            display: inline-block;
            padding: 6px 16px;
            background: #E8F0FE;
            color: var(--ztdk-primary);
            border-radius: 30px;
            font-size: 13px;
            font-weight: 700;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .ztdk-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            letter-spacing: -1px;
            color: #1a1a1a;
        }

        .ztdk-hero-subtitle {
            font-size: clamp(1.1rem, 2vw + 0.5rem, 1.4rem);
            color: var(--ztdk-text-light);
            margin-bottom: 48px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        /* Laboratory Flag Grid */
        .ztdk-section {
            padding: 80px 0;
        }

        .ztdk-section-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 48px;
            text-align: center;
        }

        .ztdk-flag-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .ztdk-flag-card {
            background: var(--ztdk-bg);
            border: 1px solid #eee;
            border-radius: 16px;
            padding: 32px;
            transition: var(--ztdk-transition);
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .ztdk-flag-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--ztdk-card-shadow);
            border-color: var(--ztdk-primary);
        }

        .ztdk-flag-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            font-size: 24px;
            background: #f1f3f4;
        }

        .ztdk-flag-name {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--ztdk-primary);
        }

        .ztdk-flag-desc {
            font-size: 15px;
            color: var(--ztdk-text-light);
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .ztdk-flag-tag {
            font-family: monospace;
            background: #f1f3f4;
            padding: 4px 8px;
            border-radius: 4px;
            font-size: 12px;
            color: #555;
        }

        /* Technical Architecture - Magazine Style */
        .ztdk-architecture {
            background: #1a1a1a;
            color: #fff;
            padding: 100px 0;
            border-radius: 40px;
            margin: 40px 24px;
        }

        .ztdk-arch-layout {
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            align-items: center;
        }

        .ztdk-arch-text {
            flex: 1;
            min-width: 300px;
        }

        .ztdk-arch-visual {
            flex: 1;
            min-width: 300px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .ztdk-arch-box {
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.1);
            padding: 24px;
            border-radius: 20px;
            backdrop-filter: blur(5px);
        }

        .ztdk-arch-box h4 {
            color: var(--ztdk-primary);
            margin-bottom: 12px;
        }

        .ztdk-arch-title {
            font-size: clamp(2rem, 3vw, 3rem);
            line-height: 1.2;
            margin-bottom: 32px;
        }

        /* Productivity Synergy */
        .ztdk-synergy {
            padding: 100px 0;
        }

        .ztdk-synergy-item {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            margin-bottom: 80px;
            align-items: center;
        }

        .ztdk-synergy-item:nth-child(even) {
            flex-direction: row-reverse;
        }

        .ztdk-synergy-content {
            flex: 1;
            min-width: 300px;
        }

        .ztdk-synergy-image-placeholder {
            flex: 1;
            min-width: 300px;
            height: 400px;
            background: linear-gradient(135deg, #f1f3f4 0%, #e8eaed 100%);
            border-radius: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        .ztdk-synergy-image-placeholder::before {
            content: '';
            position: absolute;
            width: 80%;
            height: 80%;
            border: 2px dashed rgba(66, 133, 244, 0.2);
            border-radius: 24px;
        }

        /* Footer */
        .ztdk-footer {
            padding: 80px 0 40px;
            background: var(--ztdk-bg-alt);
            border-top: 1px solid #eee;
        }

        .ztdk-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .ztdk-footer-brand {
            font-size: 24px;
            font-weight: 700;
            color: var(--ztdk-text);
            margin-bottom: 16px;
        }

        .ztdk-footer-links h5 {
            font-size: 16px;
            margin-bottom: 24px;
            color: var(--ztdk-text);
        }

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

        .ztdk-footer-links li {
            margin-bottom: 12px;
        }

        .ztdk-footer-links a {
            text-decoration: none;
            color: var(--ztdk-text-light);
            font-size: 14px;
            transition: var(--ztdk-transition);
        }

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

        .ztdk-footer-bottom {
            padding-top: 32px;
            border-top: 1px solid #ddd;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 13px;
            color: var(--ztdk-text-light);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .ztdk-menu {
                display: none; /* In a real app, a hamburger menu would go here */
            }
        }

        @media (max-width: 768px) {
            .ztdk-hero {
                padding: 120px 0 60px;
            }
            .ztdk-architecture {
                margin: 20px 0;
                border-radius: 0;
            }
            .ztdk-arch-visual {
                grid-template-columns: 1fr;
            }
            .ztdk-synergy-image-placeholder {
                height: 250px;
            }
        }