:root {
            --ztdk-google-blue: #4285F4;
            --ztdk-google-red: #EA4335;
            --ztdk-google-yellow: #FBBC05;
            --ztdk-google-green: #34A853;
            --ztdk-text-main: #202124;
            --ztdk-text-sub: #5f6368;
            --ztdk-bg-light: #f8f9fa;
            --ztdk-white: #ffffff;
            --ztdk-transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
            --ztdk-spacing-unit: 8px;
        }

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

        body {
            font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--ztdk-text-main);
            background-color: var(--ztdk-bg-light);
            line-height: 1.7;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* Typography */
        h1, h2, h3 {
            font-weight: 700;
            line-height: 1.2;
            white-space: normal;
            word-break: break-word;
        }

        h1 { font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem); }
        h2 { font-size: clamp(1.8rem, 3vw + 0.5rem, 2.8rem); margin-bottom: 24px; }
        p { 
            font-size: clamp(1rem, 1vw + 0.5rem, 1.15rem); 
            color: var(--ztdk-text-sub);
            max-width: 800px;
            word-break: break-word;
            overflow-wrap: break-word;
        }

        /* Layout Helpers */
        .ztdk-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 5vw;
        }

        .ztdk-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .ztdk-flex-item {
            min-width: 0;
        }

        .ztdk-section {
            padding: 96px 0;
            position: relative;
        }

        /* Navigation - Dynamic Light Trail Effect */
        .ztdk-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(15px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: var(--ztdk-transition);
        }

        .ztdk-nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
            flex-wrap: wrap;
        }

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

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

        .ztdk-nav-menu {
            display: flex;
            list-style: none;
            gap: 16px;
            flex-wrap: wrap;
            min-width: 0;
        }

        .ztdk-nav-item a {
            text-decoration: none;
            color: var(--ztdk-text-main);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 12px;
            position: relative;
            transition: var(--ztdk-transition);
            display: block;
        }

        .ztdk-nav-item a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--ztdk-google-blue), var(--ztdk-google-red), var(--ztdk-google-yellow), var(--ztdk-google-green));
            transition: var(--ztdk-transition);
            transform: translateX(-50%);
        }

        .ztdk-nav-item a:hover::after,
        .ztdk-nav-item.ztdk-active a::after {
            width: 80%;
        }

        .ztdk-nav-item a:hover {
            color: var(--ztdk-google-blue);
            text-shadow: 0 0 15px rgba(66, 133, 244, 0.3);
        }

        /* Hero Section - Asymmetric Layout */
        .ztdk-hero {
            padding-top: 160px;
            background: radial-gradient(circle at 80% 20%, rgba(66, 133, 244, 0.05) 0%, transparent 40%);
        }

        .ztdk-hero-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 32px;
            align-items: center;
        }

        .ztdk-hero-content {
            grid-column: 1 / 7;
            z-index: 2;
        }

        .ztdk-hero-image-box {
            grid-column: 6 / 13;
            position: relative;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: 0 50px 100px -20px rgba(0,0,0,0.15);
            transition: var(--ztdk-transition);
        }

        .ztdk-hero-image-box:hover {
            transform: translateY(-10px) scale(1.02);
        }

        .ztdk-hero-image-box img {
            width: 100%;
            height: auto;
            display: block;
        }

        .ztdk-btn-primary {
            display: inline-block;
            padding: 16px 40px;
            background: var(--ztdk-google-blue);
            color: var(--ztdk-white);
            text-decoration: none;
            border-radius: 50px;
            font-weight: 600;
            margin-top: 32px;
            transition: var(--ztdk-transition);
            box-shadow: 0 10px 20px rgba(66, 133, 244, 0.2);
        }

        .ztdk-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(66, 133, 244, 0.4);
            background: #3367d6;
        }

        /* Features Section - Magazine Style */
        .ztdk-feature-card {
            background: var(--ztdk-white);
            border-radius: 24px;
            padding: 48px;
            margin-bottom: 48px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
            transition: var(--ztdk-transition);
            border: 1px solid rgba(0,0,0,0.03);
        }

        .ztdk-feature-card:hover {
            box-shadow: 0 30px 60px rgba(0,0,0,0.08);
            transform: translateY(-5px);
        }

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

        .ztdk-img-full {
            width: 100%;
            border-radius: 16px;
            margin-bottom: 24px;
            object-fit: cover;
        }

        .ztdk-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 16px;
            background: rgba(66, 133, 244, 0.1);
            color: var(--ztdk-google-blue);
        }

        /* Technical Layers */
        .ztdk-tech-layer {
            border-left: 4px solid var(--ztdk-google-green);
            padding-left: 24px;
            margin-bottom: 40px;
        }

        .ztdk-stat-badge {
            display: inline-flex;
            align-items: center;
            background: #f1f3f4;
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 14px;
            margin-right: 12px;
            margin-top: 12px;
        }

        /* Dynamic Content Marker */
        .ztdk-news-section {
            background: #fff;
            padding: 80px 0;
            border-radius: 40px 40px 0 0;
        }

        /* Footer */
        .ztdk-footer {
            background: #202124;
            color: #bdc1c6;
            padding: 64px 0 32px;
        }

        .ztdk-footer-brand {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 24px;
        }

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

        .ztdk-footer-link {
            display: block;
            color: #bdc1c6;
            text-decoration: none;
            margin-bottom: 12px;
            transition: var(--ztdk-transition);
        }

        .ztdk-footer-link:hover {
            color: #fff;
        }

        .ztdk-copyright {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 32px;
            font-size: 14px;
            text-align: center;
        }

        /* Mobile Adjustments */
        @media (max-width: 1024px) {
            .ztdk-hero-grid {
                display: flex;
                flex-direction: column;
            }
            .ztdk-hero-content {
                margin-bottom: 48px;
                text-align: center;
            }
            .ztdk-hero-content p {
                margin: 0 auto;
            }
        }

        @media (max-width: 768px) {
            .ztdk-nav-menu {
                display: none; /* In real design, would implement a burger menu */
            }
            .ztdk-section {
                padding: 64px 0;
            }
            .ztdk-hero-image-box {
                grid-column: 1 / 13;
            }
        }

        /* Animation enhancement */
        .ztdk-reveal {
            transition: var(--ztdk-transition);
        }
        .ztdk-reveal:hover {
            transform: scale(1.01);
        }