:root {
            --ztdk-primary: #4285f4;
            --ztdk-red: #ea4335;
            --ztdk-yellow: #fbbc05;
            --ztdk-green: #34a853;
            --ztdk-bg: #ffffff;
            --ztdk-text: #202124;
            --ztdk-text-light: #5f6368;
            --ztdk-card-bg: #f8f9fa;
            --ztdk-border: #dadce0;
            --ztdk-max-width: 1400px;
            --ztdk-transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
        }

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

        body {
            font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            line-height: 1.6;
            color: var(--ztdk-text);
            background-color: var(--ztdk-bg);
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 导航栏 - 动态光迹效果 */
        .ztdk-nav-container {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--ztdk-border);
        }

        .ztdk-nav-wrapper {
            max-width: var(--ztdk-max-width);
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 48px;
            height: 72px;
        }

        .ztdk-logo {
            flex-shrink: 0;
        }

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

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

        .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;
        }

        /* 动态光迹悬停效果 */
        .ztdk-menu-item a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: -100%;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, var(--ztdk-primary), var(--ztdk-red), var(--ztdk-yellow), var(--ztdk-green));
            transition: var(--ztdk-transition);
        }

        .ztdk-menu-item a:hover::after {
            left: 0;
        }

        .ztdk-menu-item a:hover {
            color: var(--ztdk-text);
            background: rgba(0, 0, 0, 0.04);
        }

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

        /* Hero 区 - 对角线分割与 3D 氛围 */
        .ztdk-hero {
            padding: 160px 48px 100px;
            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%);
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            min-height: 80vh;
        }

        .ztdk-hero-content {
            max-width: 900px;
            z-index: 2;
        }

        .ztdk-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 24px;
            word-break: break-word;
            background: linear-gradient(135deg, #202124 30%, #5f6368);
            -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-light);
            margin-bottom: 48px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.8;
            word-break: break-word;
        }

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

        .ztdk-btn {
            padding: 16px 32px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--ztdk-transition);
            cursor: pointer;
            border: none;
        }

        .ztdk-btn-primary {
            background: var(--ztdk-primary);
            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);
        }

        .ztdk-btn-outline {
            background: white;
            color: var(--ztdk-primary);
            border: 2px solid var(--ztdk-primary);
        }

        .ztdk-btn-outline:hover {
            background: rgba(66, 133, 244, 0.05);
            transform: translateY(-3px);
        }

        /* 核心架构层 - 3D 渲染风格 */
        .ztdk-tech-section {
            padding: 100px 48px;
            background-color: #f1f3f4;
            clip-path: polygon(0 5%, 100% 0, 100% 95%, 0 100%);
        }

        .ztdk-tech-grid {
            max-width: var(--ztdk-max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 48px;
            align-items: center;
        }

        .ztdk-tech-card {
            background: white;
            padding: 64px;
            border-radius: 32px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.05);
            transition: var(--ztdk-transition);
            min-width: 0;
        }

        .ztdk-tech-card:hover {
            transform: scale(1.02);
        }

        .ztdk-tech-tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(52, 168, 83, 0.1);
            color: var(--ztdk-green);
            border-radius: 30px;
            font-size: 12px;
            font-weight: 700;
            margin-bottom: 24px;
            text-transform: uppercase;
        }

        .ztdk-tech-title {
            font-size: 32px;
            margin-bottom: 20px;
            color: var(--ztdk-text);
        }

        .ztdk-tech-desc {
            color: var(--ztdk-text-light);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .ztdk-tech-stats {
            display: flex;
            gap: 24px;
            border-top: 1px solid var(--ztdk-border);
            padding-top: 32px;
            flex-wrap: wrap;
        }

        .ztdk-stat-item {
            flex: 1;
            min-width: 120px;
        }

        .ztdk-stat-label {
            font-size: 12px;
            color: var(--ztdk-text-light);
            display: block;
            margin-bottom: 4px;
        }

        .ztdk-stat-value {
            font-weight: 700;
            color: var(--ztdk-primary);
            font-size: 18px;
        }

        /* 生产力矩阵 - 杂志级节奏感 */
        .ztdk-synergy-section {
            padding: 120px 48px;
            max-width: var(--ztdk-max-width);
            margin: 0 auto;
        }

        .ztdk-synergy-item {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 80px;
            margin-bottom: 120px;
        }

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

        .ztdk-synergy-visual {
            flex: 1;
            min-width: 300px;
            height: 400px;
            background: linear-gradient(45deg, #f1f3f4, #e8eaed);
            border-radius: 24px;
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* CSS 模拟的 UI 界面 */
        .ztdk-ui-mockup {
            width: 80%;
            height: 70%;
            background: white;
            border-radius: 12px;
            box-shadow: 0 30px 60px rgba(0,0,0,0.1);
            padding: 20px;
            position: relative;
        }

        .ztdk-ui-line {
            height: 8px;
            background: #f1f3f4;
            border-radius: 4px;
            margin-bottom: 12px;
        }

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

        .ztdk-synergy-label {
            color: var(--ztdk-primary);
            font-weight: 700;
            font-size: 14px;
            margin-bottom: 16px;
            display: block;
        }

        .ztdk-synergy-title {
            font-size: 40px;
            margin-bottom: 24px;
            line-height: 1.2;
        }

        /* 动态文章区块 */
        .ztdk-news-section {
            padding: 100px 48px;
            background: #fff;
        }

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

        .ztdk-news-grid {
            max-width: var(--ztdk-max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .ztdk-news-card {
            padding: 32px;
            border: 1px solid var(--ztdk-border);
            border-radius: 16px;
            transition: var(--ztdk-transition);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .ztdk-news-card:hover {
            border-color: var(--ztdk-primary);
            box-shadow: 0 10px 30px rgba(66, 133, 244, 0.1);
        }

        .ztdk-news-date {
            font-size: 12px;
            color: var(--ztdk-text-light);
            margin-bottom: 12px;
        }

        .ztdk-news-title {
            font-size: 20px;
            margin-bottom: 16px;
            word-break: break-word;
        }

        /* 页脚 - 简约专业 */
        .ztdk-footer {
            padding: 80px 48px;
            background: #202124;
            color: white;
            text-align: center;
        }

        .ztdk-footer-brand {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 40px;
        }

        .ztdk-footer-links {
            display: flex;
            justify-content: center;
            gap: 32px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        .ztdk-footer-links a {
            color: #9aa0a6;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }

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

        .ztdk-footer-copy {
            font-size: 12px;
            color: #70757a;
            border-top: 1px solid #3c4043;
            padding-top: 40px;
        }

        /* 响应式适配 */
        @media (max-width: 992px) {
            .ztdk-nav-wrapper { padding: 0 24px; }
            .ztdk-menu { display: none; } /* 移动端建议折叠菜单，此处简化 */
            .ztdk-hero { padding: 120px 24px 60px; }
            .ztdk-tech-grid { grid-template-columns: 1fr; }
            .ztdk-synergy-item { gap: 40px; margin-bottom: 80px; }
        }

        @media (max-width: 768px) {
            .ztdk-synergy-item, .ztdk-synergy-item:nth-child(even) {
                flex-direction: column;
            }
            .ztdk-tech-card { padding: 32px; }
            .ztdk-news-grid { grid-template-columns: 1fr; }
        }