:root {
            --ztdk-color-blue: #4285F4;
            --ztdk-color-red: #EA4335;
            --ztdk-color-yellow: #FBBC05;
            --ztdk-color-green: #34A853;
            --ztdk-bg-soft: #f8f9fa;
            --ztdk-text-main: #202124;
            --ztdk-text-muted: #5f6368;
            --ztdk-max-width: 1300px;
            --ztdk-radius: 20px;
            --ztdk-transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
        }

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

        body {
            font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
            color: var(--ztdk-text-main);
            background-color: #fff;
            line-height: 1.6;
            overflow-x: hidden;
            word-break: break-word;
        }

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

        .ztdk-nav-container {
            max-width: var(--ztdk-max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

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

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

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

        .ztdk-nav-item a {
            text-decoration: none;
            color: var(--ztdk-text-muted);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 30px;
            transition: var(--ztdk-transition);
            position: relative;
            display: block;
        }

        /* 动态光迹悬停效果 */
        .ztdk-nav-item a:hover {
            color: var(--ztdk-color-blue);
            background: rgba(66, 133, 244, 0.05);
        }

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

        .ztdk-nav-item a:hover::after {
            width: 60%;
        }

        .ztdk-nav-item.ztdk-active a {
            color: var(--ztdk-color-blue);
            background: rgba(66, 133, 244, 0.08);
        }

        /* Hero 区域：全屏背景+卡片式布局 */
        .ztdk-hero {
            padding-top: 140px;
            padding-bottom: 80px;
            background: radial-gradient(circle at 10% 20%, rgba(66, 133, 244, 0.03) 0%, rgba(255, 255, 255, 1) 90%);
            position: relative;
            overflow: hidden;
        }

        /* 模拟动态光迹背景 */
        .ztdk-hero::before {
            content: '';
            position: absolute;
            top: -20%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(66, 133, 244, 0.1) 0%, transparent 70%);
            filter: blur(80px);
            animation: pulse 10s infinite alternate;
        }

        @keyframes pulse {
            0% { transform: scale(1); opacity: 0.5; }
            100% { transform: scale(1.5); opacity: 0.8; }
        }

        .ztdk-container {
            max-width: var(--ztdk-max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .ztdk-hero-wrapper {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .ztdk-hero-content {
            flex: 1;
            min-width: 320px;
        }

        .ztdk-hero-tag {
            display: inline-block;
            background: linear-gradient(135deg, var(--ztdk-color-blue), #6a9df5);
            color: white;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
            box-shadow: 0 10px 20px rgba(66, 133, 244, 0.2);
        }

        .ztdk-hero-title {
            font-size: clamp(2.2rem, 5vw + 1rem, 4.2rem);
            font-weight: 800;
            line-height: 1.1;
            color: var(--ztdk-text-main);
            margin-bottom: 24px;
            letter-spacing: -1px;
        }

        .ztdk-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.4rem);
            color: var(--ztdk-text-muted);
            max-width: 600px;
            margin-bottom: 40px;
        }

        .ztdk-download-panel {
            flex: 1;
            min-width: 320px;
            background: rgba(255, 255, 255, 0.7);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.8);
            padding: 48px;
            border-radius: var(--ztdk-radius);
            box-shadow: 0 30px 60px rgba(0,0,0,0.08);
            text-align: center;
        }

        .ztdk-btn-primary {
            display: inline-block;
            background: var(--ztdk-color-blue);
            color: white;
            padding: 18px 48px;
            border-radius: 50px;
            font-size: 18px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--ztdk-transition);
            box-shadow: 0 15px 30px rgba(66, 133, 244, 0.3);
            margin-bottom: 24px;
        }

        .ztdk-btn-primary:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px rgba(66, 133, 244, 0.4);
            background: #3367d6;
        }

        .ztdk-download-info {
            font-size: 14px;
            color: var(--ztdk-text-muted);
        }

        /* 核心架构层 */
        .ztdk-section-title {
            text-align: center;
            margin-bottom: 64px;
        }

        .ztdk-section-title h2 {
            font-size: clamp(1.8rem, 3vw + 0.5rem, 2.8rem);
            font-weight: 700;
            margin-bottom: 16px;
        }

        .ztdk-tech-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            margin-bottom: 96px;
        }

        .ztdk-tech-card {
            flex: 1;
            min-width: 300px;
            background: var(--ztdk-bg-soft);
            padding: 40px;
            border-radius: var(--ztdk-radius);
            transition: var(--ztdk-transition);
            border: 1px solid transparent;
        }

        .ztdk-tech-card:hover {
            background: white;
            border-color: var(--ztdk-color-blue);
            box-shadow: 0 20px 40px rgba(0,0,0,0.05);
            transform: scale(1.02);
        }

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

        .ztdk-tech-card h3 {
            font-size: 24px;
            margin-bottom: 16px;
            color: var(--ztdk-color-blue);
        }

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

        .ztdk-benchmark-list {
            list-style: none;
            padding-top: 24px;
            border-top: 1px dashed #dadce0;
        }

        .ztdk-benchmark-item {
            display: flex;
            justify-content: space-between;
            margin-bottom: 8px;
            font-size: 14px;
        }

        .ztdk-benchmark-label { font-weight: 600; }

        /* 协同矩阵区块 - 杂志级图文节奏 */
        .ztdk-synergy-section {
            padding: 96px 0;
            background: #fff;
        }

        .ztdk-feature-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            margin-bottom: 120px;
        }

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

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

        .ztdk-feature-visual {
            flex: 1.2;
            min-width: 320px;
            position: relative;
        }

        .ztdk-3d-placeholder {
            width: 100%;
            height: 400px;
            background: linear-gradient(135deg, #f1f3f4 0%, #e8eaed 100%);
            border-radius: var(--ztdk-radius);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: inset 0 0 50px rgba(0,0,0,0.02);
            overflow: hidden;
        }

        .ztdk-3d-element {
            width: 150px;
            height: 150px;
            border-radius: 30px;
            background: white;
            box-shadow: 20px 20px 60px rgba(0,0,0,0.1);
            transform: rotateX(20deg) rotateY(-20deg);
            animation: float 4s ease-in-out infinite;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 60px;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0) rotateX(20deg) rotateY(-20deg); }
            50% { transform: translateY(-20px) rotateX(25deg) rotateY(-15deg); }
        }

        .ztdk-feature-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .ztdk-synergy-level {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 4px;
            background: #e8f0fe;
            color: var(--ztdk-color-blue);
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            margin-bottom: 16px;
        }

        /* 动态资讯区块 */
        .ztdk-dynamic-section {
            padding: 80px 0;
            background: var(--ztdk-bg-soft);
        }

        .ztdk-news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }

        .ztdk-news-card {
            background: white;
            padding: 32px;
            border-radius: 16px;
            transition: var(--ztdk-transition);
        }

        .ztdk-news-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.05);
        }

        /* 页脚设计 */
        .ztdk-footer {
            background: #f1f3f4;
            padding: 80px 0 40px;
            color: var(--ztdk-text-muted);
        }

        .ztdk-footer-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            margin-bottom: 64px;
        }

        .ztdk-footer-brand {
            flex: 1.5;
            min-width: 250px;
        }

        .ztdk-footer-brand-name {
            font-size: 24px;
            font-weight: 700;
            color: var(--ztdk-text-main);
            margin-bottom: 16px;
        }

        .ztdk-footer-links {
            flex: 1;
            min-width: 150px;
        }

        .ztdk-footer-links h4 {
            color: var(--ztdk-text-main);
            margin-bottom: 24px;
            font-size: 16px;
        }

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

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

        .ztdk-footer-links a {
            text-decoration: none;
            color: inherit;
            transition: var(--ztdk-transition);
        }

        .ztdk-footer-links a:hover {
            color: var(--ztdk-color-blue);
        }

        .ztdk-footer-bottom {
            padding-top: 40px;
            border-top: 1px solid rgba(0,0,0,0.05);
            text-align: center;
            font-size: 14px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .ztdk-nav-container {
                height: auto;
                padding: 16px;
            }
            .ztdk-nav-menu {
                width: 100%;
                order: 3;
                margin-top: 16px;
                justify-content: center;
            }
            .ztdk-hero {
                padding-top: 180px;
            }
            .ztdk-hero-wrapper {
                text-align: center;
            }
            .ztdk-hero-subtitle {
                margin: 0 auto 40px;
            }
            .ztdk-feature-row, .ztdk-feature-row:nth-child(even) {
                flex-direction: column;
                text-align: center;
            }
        }