: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: #ffffff;
            --ztdk-bg-soft: #f8f9fa;
            --ztdk-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --ztdk-radius: 16px;
            --ztdk-container-width: 1100px;
        }

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

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

        /* 导航栏样式 - 动态光迹效果 */
        .ztdk-navbar {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            padding: 0 24px;
        }

        .ztdk-nav-container {
            max-width: var(--ztdk-container-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            height: 72px;
        }

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

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

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

        .ztdk-nav-item a {
            text-decoration: none;
            color: var(--ztdk-text-sub);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 20px;
            transition: all 0.3s ease;
            position: relative;
            display: block;
            min-width: 0;
        }

        /* 动态光迹悬停效果 */
        .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: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            transform: translateX(-50%);
        }

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

        .ztdk-nav-item a:hover, .ztdk-nav-item a.ztdk-active {
            color: var(--ztdk-google-blue);
            background: rgba(66, 133, 244, 0.05);
        }

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

        /* Hero 区域 - 非对称杂志布局 */
        .ztdk-hero {
            padding: 140px 24px 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%);
        }

        .ztdk-hero-grid {
            max-width: var(--ztdk-container-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 48px;
            align-items: center;
        }

        .ztdk-hero-content {
            min-width: 0;
        }

        .ztdk-hero-tag {
            display: inline-block;
            background: var(--ztdk-google-blue);
            color: white;
            padding: 4px 16px;
            border-radius: 30px;
            font-size: 14px;
            margin-bottom: 24px;
            font-weight: 600;
        }

        .ztdk-hero-title {
            font-size: clamp(2.5rem, 5vw, 3.5rem);
            line-height: 1.1;
            font-weight: 800;
            color: var(--ztdk-text-main);
            margin-bottom: 24px;
            letter-spacing: -0.02em;
        }

        .ztdk-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: var(--ztdk-text-sub);
            margin-bottom: 40px;
            max-width: 540px;
            line-height: 1.8;
        }

        .ztdk-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .ztdk-btn {
            padding: 16px 32px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: inline-block;
            text-align: center;
        }

        .ztdk-btn-primary {
            background: var(--ztdk-google-blue);
            color: white;
            box-shadow: 0 4px 15px rgba(66, 133, 244, 0.3);
        }

        .ztdk-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(66, 133, 244, 0.4);
        }

        /* 核心架构区块 */
        .ztdk-section {
            padding: 96px 24px;
            max-width: var(--ztdk-container-width);
            margin: 0 auto;
        }

        .ztdk-section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .ztdk-section-title {
            font-size: 2.5rem;
            margin-bottom: 16px;
        }

        .ztdk-tech-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
        }

        .ztdk-card {
            background: var(--ztdk-bg-soft);
            padding: 40px;
            border-radius: var(--ztdk-radius);
            transition: all 0.3s ease;
            border: 1px solid rgba(0,0,0,0.03);
            min-width: 0;
        }

        .ztdk-card:hover {
            background: white;
            box-shadow: var(--ztdk-shadow);
            transform: translateY(-10px);
        }

        .ztdk-card-icon {
            font-size: 40px;
            margin-bottom: 24px;
            display: block;
        }

        .ztdk-card h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--ztdk-google-blue);
        }

        .ztdk-tech-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 20px;
        }

        .ztdk-tech-tag {
            font-size: 12px;
            background: rgba(0,0,0,0.05);
            padding: 4px 10px;
            border-radius: 4px;
            color: var(--ztdk-text-sub);
        }

        /* 生产力矩阵区块 - 左右交替布局 */
        .ztdk-feature-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            margin-bottom: 80px;
        }

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

        .ztdk-feature-image {
            flex: 1;
            min-width: 320px;
            background: linear-gradient(135deg, #f1f3f4 0%, #e8eaed 100%);
            height: 400px;
            border-radius: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        /* 模拟3D视觉元素 */
        .ztdk-feature-image::before {
            content: '';
            position: absolute;
            width: 200px;
            height: 200px;
            background: var(--ztdk-google-yellow);
            filter: blur(80px);
            opacity: 0.2;
            top: -50px;
            right: -50px;
        }

        .ztdk-feature-info {
            flex: 1;
            min-width: 320px;
        }

        .ztdk-synergy-level {
            font-weight: 700;
            color: var(--ztdk-google-green);
            text-transform: uppercase;
            font-size: 12px;
            letter-spacing: 2px;
            margin-bottom: 16px;
            display: block;
        }

        /* 动态资讯区块 */
        .ztdk-news-section {
            background: #f8f9fa;
            padding: 96px 24px;
        }

        .ztdk-news-inner {
            max-width: var(--ztdk-container-width);
            margin: 0 auto;
        }

        .ztdk-news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .ztdk-news-item {
            background: white;
            padding: 32px;
            border-radius: 12px;
            border-left: 4px solid var(--ztdk-google-red);
        }

        /* 页脚样式 */
        .ztdk-footer {
            background: #202124;
            color: #bdc1c6;
            padding: 80px 24px 40px;
        }

        .ztdk-footer-container {
            max-width: var(--ztdk-container-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            border-bottom: 1px solid #3c4043;
            padding-bottom: 48px;
        }

        .ztdk-footer-brand h2 {
            color: white;
            margin-bottom: 24px;
            font-size: 1.5rem;
        }

        .ztdk-footer-links h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

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

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

        .ztdk-footer-links a {
            color: #bdc1c6;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }

        .ztdk-footer-links a:hover {
            color: white;
        }

        .ztdk-footer-bottom {
            max-width: var(--ztdk-container-width);
            margin: 40px auto 0;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .ztdk-nav-menu {
                display: none; /* 简化移动端，实际开发可添加汉堡菜单 */
            }
            .ztdk-hero {
                padding-top: 100px;
                text-align: center;
            }
            .ztdk-hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
            .ztdk-cta-group {
                justify-content: center;
            }
            .ztdk-feature-row {
                flex-direction: column !important;
            }
            .ztdk-feature-image {
                width: 100%;
                height: 250px;
            }
        }