:root {
            --ztdk-google-blue: #4285F4;
            --ztdk-google-red: #EA4335;
            --ztdk-google-yellow: #FBBC05;
            --ztdk-google-green: #34A853;
            --ztdk-bg-light: #f8f9fa;
            --ztdk-text-main: #202124;
            --ztdk-text-sub: #5f6368;
            --ztdk-white: #ffffff;
            --ztdk-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --ztdk-radius: 16px;
        }

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

        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            color: var(--ztdk-text-main);
            background-color: var(--ztdk-bg-light);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 导航栏设计：动态光迹悬停效果 */
        .ztdk-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }

        .ztdk-nav-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 12px 24px;
        }

        .ztdk-logo {
            flex-shrink: 0;
            min-width: 0;
            margin-right: 32px;
        }

        .ztdk-logo img {
            height: 40px;
            display: block;
        }

        .ztdk-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 8px;
            min-width: 0;
        }

        .ztdk-nav-item {
            min-width: 0;
            position: relative;
        }

        .ztdk-nav-link {
            text-decoration: none;
            color: var(--ztdk-text-sub);
            font-weight: 500;
            padding: 8px 16px;
            font-size: 15px;
            display: block;
            transition: color 0.3s ease;
            white-space: nowrap;
        }

        /* 动态光迹悬停逻辑 */
        .ztdk-nav-link::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: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            transform: translateX(-50%);
        }

        .ztdk-nav-link:hover::after {
            width: 80%;
        }

        .ztdk-nav-link:hover {
            color: var(--ztdk-google-blue);
        }

        .ztdk-nav-link.ztdk-active {
            color: var(--ztdk-google-blue);
            font-weight: 700;
        }

        .ztdk-nav-link.ztdk-active::after {
            width: 80%;
        }

        /* Hero 区域：杂志级节奏感布局 */
        .ztdk-hero {
            padding: 96px 24px;
            background: radial-gradient(circle at top right, #e8f0fe 0%, #ffffff 60%);
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            align-items: center;
            overflow: hidden;
        }

        .ztdk-hero-content {
            flex: 1;
            min-width: 320px;
            max-width: 700px;
            padding: 24px;
            word-break: break-word;
        }

        .ztdk-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            background: linear-gradient(135deg, #1a73e8, #d93025);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .ztdk-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.4rem);
            color: var(--ztdk-text-sub);
            margin-bottom: 48px;
            max-width: 600px;
            line-height: 1.8;
        }

        .ztdk-hero-visual {
            flex: 1;
            min-width: 320px;
            max-width: 600px;
            display: flex;
            justify-content: center;
            position: relative;
        }

        /* 3D渲染风格装饰 */
        .ztdk-3d-card {
            width: 100%;
            height: 400px;
            background: var(--ztdk-white);
            border-radius: var(--ztdk-radius);
            box-shadow: var(--ztdk-shadow);
            transform: perspective(1000px) rotateY(-15deg) rotateX(10deg);
            display: flex;
            flex-direction: column;
            padding: 32px;
            border: 1px solid rgba(0,0,0,0.05);
            transition: transform 0.6s ease;
        }

        .ztdk-3d-card:hover {
            transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
        }

        .ztdk-cache-bar {
            height: 12px;
            background: #eee;
            border-radius: 6px;
            margin-bottom: 24px;
            overflow: hidden;
            position: relative;
        }

        .ztdk-cache-progress {
            position: absolute;
            left: 0;
            top: 0;
            height: 100%;
            width: 75%;
            background: linear-gradient(90deg, var(--ztdk-google-blue), var(--ztdk-google-green));
        }

        /* 核心技术层布局 */
        .ztdk-tech-section {
            padding: 96px 24px;
            max-width: 1400px;
            margin: 0 auto;
        }

        .ztdk-grid-layout {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .ztdk-tech-card {
            background: var(--ztdk-white);
            padding: 48px;
            border-radius: var(--ztdk-radius);
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }

        .ztdk-tech-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--ztdk-shadow);
        }

        .ztdk-tech-tag {
            display: inline-block;
            padding: 4px 12px;
            background: #e8f0fe;
            color: var(--ztdk-google-blue);
            font-size: 12px;
            font-weight: 700;
            border-radius: 20px;
            margin-bottom: 16px;
            width: fit-content;
        }

        .ztdk-tech-name {
            font-size: 24px;
            margin-bottom: 16px;
        }

        .ztdk-tech-detail {
            color: var(--ztdk-text-sub);
            font-size: 16px;
            margin-bottom: 24px;
        }

        /* 生产力矩阵区块 */
        .ztdk-synergy-section {
            background-color: #ffffff;
            padding: 96px 24px;
        }

        .ztdk-synergy-container {
            max-width: 1100px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            align-items: center;
        }

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

        .ztdk-synergy-badge {
            color: var(--ztdk-google-green);
            font-weight: 800;
            text-transform: uppercase;
            letter-spacing: 1px;
            font-size: 14px;
            margin-bottom: 8px;
            display: block;
        }

        /* 下载行动区 */
        .ztdk-cta-box {
            background: var(--ztdk-text-main);
            color: var(--ztdk-white);
            padding: 80px 48px;
            border-radius: 32px;
            text-align: center;
            margin: 96px auto;
            max-width: 1200px;
            position: relative;
            overflow: hidden;
        }

        .ztdk-cta-box::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(66, 133, 244, 0.1) 0%, transparent 70%);
        }

        .ztdk-btn-primary {
            display: inline-block;
            padding: 20px 48px;
            background: var(--ztdk-google-blue);
            color: white;
            text-decoration: none;
            border-radius: 50px;
            font-size: 18px;
            font-weight: 600;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(66, 133, 244, 0.4);
            position: relative;
            z-index: 1;
        }

        .ztdk-btn-primary:hover {
            background: #1a73e8;
            transform: scale(1.05);
            box-shadow: 0 8px 25px rgba(66, 133, 244, 0.5);
        }

        /* 底部设计 */
        .ztdk-footer {
            padding: 64px 24px;
            border-top: 1px solid #eee;
            background: var(--ztdk-white);
        }

        .ztdk-footer-inner {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
        }

        .ztdk-footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: var(--ztdk-text-main);
            margin-bottom: 16px;
        }

        .ztdk-footer-copyright {
            color: var(--ztdk-text-sub);
            font-size: 14px;
            width: 100%;
            margin-top: 48px;
            text-align: center;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .ztdk-nav-container {
                justify-content: center;
            }
            .ztdk-nav-menu {
                justify-content: center;
                margin-top: 16px;
            }
            .ztdk-hero {
                padding: 48px 24px;
                text-align: center;
            }
            .ztdk-3d-card {
                transform: none;
                height: auto;
            }
            .ztdk-hero-visual {
                margin-top: 48px;
            }
        }

        /* SEO结构化数据 */
        script[type="application/ld+json"] {
            display: none;
        }