:root {
            --tr7nn-primary: #4285F4;
            --tr7nn-red: #EA4335;
            --tr7nn-yellow: #FBBC04;
            --tr7nn-green: #34A853;
            --tr7nn-text: #202124;
            --tr7nn-text-light: #5f6368;
            --tr7nn-bg: #ffffff;
            --tr7nn-bg-alt: #f8f9fa;
            --tr7nn-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --tr7nn-shadow: 0 4px 6px rgba(32, 33, 36, 0.1);
            --tr7nn-radius: 16px;
        }

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

        body {
            font-family: "Segoe UI", Roboto, Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--tr7nn-text);
            background-color: var(--tr7nn-bg);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 导航栏设计 */
        .tr7nn-navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 72px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            z-index: 1000;
            display: flex;
            align-items: center;
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .tr7nn-nav-container {
            width: 95vw;
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

        .tr7nn-logo {
            display: flex;
            align-items: center;
            flex-shrink: 0;
        }

        .tr7nn-logo img {
            height: 32px;
            width: auto;
        }

        .tr7nn-nav-menu {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tr7nn-nav-item a {
            text-decoration: none;
            color: var(--tr7nn-text-light);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            transition: var(--tr7nn-transition);
        }

        .tr7nn-nav-item a:hover {
            background: rgba(66, 133, 244, 0.1);
            color: var(--tr7nn-primary);
        }

        .tr7nn-nav-item.tr7nn-active a {
            background: var(--tr7nn-primary);
            color: white;
        }

        /* Hero 视觉区 - 独特的不对称设计 */
        .tr7nn-hero {
            padding: 160px 0 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%);
            min-height: 80vh;
            display: flex;
            align-items: center;
        }

        .tr7nn-hero-grid {
            width: 90vw;
            max-width: 1300px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .tr7nn-hero-content {
            flex: 1;
            min-width: 320px;
            word-break: break-word;
        }

        .tr7nn-version-badge {
            display: inline-block;
            background: var(--tr7nn-bg-alt);
            border: 1px solid #dadce0;
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 600;
            color: var(--tr7nn-primary);
            margin-bottom: 24px;
        }

        .tr7nn-hero-title {
            font-size: clamp(2.5rem, 5vw, 4.5rem);
            line-height: 1.1;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 24px;
            background: linear-gradient(135deg, #202124 0%, #5f6368 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .tr7nn-hero-subtitle {
            font-size: clamp(1.1rem, 2vw, 1.4rem);
            color: var(--tr7nn-text-light);
            max-width: 600px;
            margin-bottom: 40px;
            line-height: 1.6;
        }

        .tr7nn-hero-visual {
            flex: 1;
            min-width: 320px;
            position: relative;
            display: flex;
            justify-content: center;
        }

        /* 模拟内核结构的抽象视觉 */
        .tr7nn-core-engine {
            width: 400px;
            height: 400px;
            background: white;
            border-radius: 50%;
            box-shadow: 0 20px 50px rgba(0,0,0,0.08);
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(0,0,0,0.05);
        }

        .tr7nn-engine-ring {
            position: absolute;
            border: 2px dashed #dadce0;
            border-radius: 50%;
            animation: rotate 60s linear infinite;
        }

        .tr7nn-ring-1 { width: 480px; height: 480px; opacity: 0.3; }
        .tr7nn-ring-2 { width: 320px; height: 320px; opacity: 0.5; border-style: dotted; }

        @keyframes rotate {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }

        /* 安全矩阵区块 - Grid布局 */
        .tr7nn-section {
            padding: 96px 0;
            width: 90vw;
            max-width: 1300px;
            margin: 0 auto;
        }

        .tr7nn-section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .tr7nn-section-title {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            margin-bottom: 16px;
        }

        .tr7nn-matrix-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .tr7nn-matrix-card {
            background: white;
            border: 1px solid #e8eaed;
            padding: 40px;
            border-radius: var(--tr7nn-radius);
            transition: var(--tr7nn-transition);
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .tr7nn-matrix-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 30px rgba(0,0,0,0.08);
            border-color: var(--tr7nn-primary);
        }

        .tr7nn-card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 8px;
        }

        .tr7nn-card-protocol {
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            color: var(--tr7nn-primary);
            font-weight: 700;
        }

        .tr7nn-card-title {
            font-size: 20px;
            font-weight: 700;
        }

        .tr7nn-card-desc {
            color: var(--tr7nn-text-light);
            font-size: 15px;
            line-height: 1.7;
        }

        /* 动态资讯区块 */
        .tr7nn-dynamic-wrapper {
            background: var(--tr7nn-bg-alt);
            padding: 80px 0;
            border-radius: 40px;
            margin: 40px auto;
        }

        .tr7nn-news-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
        }

        .tr7nn-news-item {
            flex: 1;
            min-width: 300px;
            background: white;
            padding: 32px;
            border-radius: var(--tr7nn-radius);
        }

        /* 页脚设计 */
        .tr7nn-footer {
            padding: 80px 0 40px;
            border-top: 1px solid #e8eaed;
            margin-top: 80px;
        }

        .tr7nn-footer-container {
            width: 90vw;
            max-width: 1300px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
        }

        .tr7nn-footer-brand {
            flex: 1;
            min-width: 240px;
        }

        .tr7nn-footer-brand h2 {
            font-size: 24px;
            margin-bottom: 16px;
            color: var(--tr7nn-primary);
        }

        .tr7nn-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            flex: 2;
            min-width: 320px;
        }

        .tr7nn-link-group h4 {
            margin-bottom: 24px;
            font-size: 16px;
        }

        .tr7nn-link-group ul {
            list-style: none;
        }

        .tr7nn-link-group li {
            margin-bottom: 12px;
        }

        .tr7nn-link-group a {
            text-decoration: none;
            color: var(--tr7nn-text-light);
            font-size: 14px;
            transition: var(--tr7nn-transition);
        }

        .tr7nn-link-group a:hover {
            color: var(--tr7nn-primary);
        }

        .tr7nn-copyright {
            width: 100%;
            padding-top: 40px;
            margin-top: 40px;
            border-top: 1px solid #eee;
            color: #9aa0a6;
            font-size: 13px;
            text-align: center;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .tr7nn-nav-menu {
                display: none; /* 简化演示，实际可做汉堡菜单 */
            }
            .tr7nn-hero-grid {
                flex-direction: column;
                text-align: center;
            }
            .tr7nn-hero-subtitle {
                margin: 0 auto 40px;
            }
            .tr7nn-core-engine {
                width: 280px;
                height: 280px;
            }
            .tr7nn-ring-1 { width: 320px; height: 320px; }
        }