:root {
            --ztdk-primary: #4285F4;
            --ztdk-red: #EA4335;
            --ztdk-yellow: #FBBC05;
            --ztdk-green: #34A853;
            --ztdk-text-dark: #202124;
            --ztdk-text-light: #5f6368;
            --ztdk-bg-gray: #f8f9fa;
            --ztdk-white: #ffffff;
            --ztdk-transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
            --ztdk-container-width: 1400px;
        }

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

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

        /* 布局通用规范 */
        .ztdk-container {
            max-width: var(--ztdk-container-width);
            margin: 0 auto;
            padding: 0 32px;
            width: 100%;
        }

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

        .ztdk-flex > * {
            min-width: 0;
        }

        .ztdk-section {
            padding: 96px 0;
            word-break: break-word;
            overflow-wrap: break-word;
        }

        /* 导航栏 */
        .ztdk-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: var(--ztdk-transition);
        }

        .ztdk-nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
            max-width: var(--ztdk-container-width);
            margin: 0 auto;
            padding: 0 32px;
        }

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

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

        .ztdk-nav-item {
            position: relative;
        }

        .ztdk-nav-link {
            text-decoration: none;
            color: var(--ztdk-text-light);
            font-weight: 500;
            padding: 8px 16px;
            font-size: 14px;
            display: block;
            transition: var(--ztdk-transition);
            position: relative;
            overflow: hidden;
        }

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

        .ztdk-nav-link:hover::after {
            left: 100%;
        }

        .ztdk-nav-link:hover, .ztdk-nav-link.ztdk-active {
            color: var(--ztdk-primary);
        }

        .ztdk-nav-link.ztdk-active::before {
            content: '';
            position: absolute;
            bottom: 0;
            left: 16px;
            right: 16px;
            height: 2px;
            background-color: var(--ztdk-primary);
        }

        /* Hero 区域 - 全屏艺术感布局 */
        .ztdk-hero {
            padding-top: 180px;
            padding-bottom: 120px;
            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-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 5rem);
            line-height: 1.1;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 24px;
            color: var(--ztdk-text-dark);
        }

        .ztdk-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--ztdk-text-light);
            max-width: 800px;
            margin: 0 auto 48px;
            word-break: keep-all;
        }

        .ztdk-btn-primary {
            display: inline-block;
            background: var(--ztdk-primary);
            color: white;
            padding: 18px 48px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            font-size: 18px;
            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, 0.3);
            background: #3367d6;
        }

        /* 插件网格 - 杂志级节奏感 */
        .ztdk-grid-layout {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 32px;
            padding: 48px 0;
        }

        .ztdk-plugin-card {
            background: var(--ztdk-white);
            border-radius: 24px;
            padding: 40px;
            border: 1px solid #eee;
            transition: var(--ztdk-transition);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .ztdk-plugin-card:hover {
            border-color: var(--ztdk-primary);
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.05);
        }

        .ztdk-card-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            background: var(--ztdk-bg-gray);
        }

        .ztdk-card-title {
            font-size: 24px;
            margin-bottom: 12px;
            font-weight: 700;
        }

        .ztdk-card-desc {
            color: var(--ztdk-text-light);
            font-size: 16px;
            flex-grow: 1;
            margin-bottom: 24px;
        }

        .ztdk-card-tag {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            color: var(--ztdk-primary);
            font-weight: 700;
            margin-bottom: 8px;
            display: block;
        }

        /* 核心技术图文区 */
        .ztdk-tech-section {
            background: #000;
            color: #fff;
            border-radius: 48px;
            margin: 48px 32px;
            padding: 96px 64px;
        }

        .ztdk-tech-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 64px;
            align-items: center;
        }

        .ztdk-tech-content h2 {
            font-size: clamp(2rem, 3vw, 3.5rem);
            line-height: 1.2;
            margin-bottom: 32px;
        }

        .ztdk-tech-list {
            list-style: none;
        }

        .ztdk-tech-item {
            margin-bottom: 32px;
            padding-left: 24px;
            border-left: 3px solid var(--ztdk-primary);
        }

        .ztdk-tech-item h4 {
            font-size: 20px;
            margin-bottom: 8px;
            color: var(--ztdk-primary);
        }

        .ztdk-tech-item p {
            color: #9aa0a6;
            font-size: 15px;
        }

        /* 侧边栏与同步生态 */
        .ztdk-synergy-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .ztdk-synergy-card {
            background: var(--ztdk-bg-gray);
            padding: 64px;
            border-radius: 32px;
            position: relative;
            overflow: hidden;
        }

        .ztdk-synergy-card h3 {
            font-size: 32px;
            margin-bottom: 16px;
        }

        .ztdk-synergy-card.ztdk-accent {
            background: linear-gradient(135deg, #4285F4 0%, #34A853 100%);
            color: white;
        }

        /* 页脚 */
        .ztdk-footer {
            padding: 96px 0 48px;
            border-top: 1px solid #eee;
            background: var(--ztdk-white);
        }

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

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

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

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

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

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

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

        .ztdk-copyright {
            margin-top: 64px;
            padding-top: 32px;
            border-top: 1px solid #eee;
            color: var(--ztdk-text-light);
            font-size: 13px;
            text-align: center;
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .ztdk-tech-grid, .ztdk-synergy-grid {
                grid-template-columns: 1fr;
            }
            .ztdk-tech-section {
                padding: 64px 32px;
            }
        }

        @media (max-width: 768px) {
            .ztdk-nav-list {
                display: none; /* 简化移动端，实际应有汉堡菜单 */
            }
            .ztdk-section {
                padding: 64px 0;
            }
            .ztdk-hero {
                padding-top: 120px;
            }
            .ztdk-grid-layout {
                grid-template-columns: 1fr;
            }
            .ztdk-synergy-card {
                padding: 32px;
            }
        }