:root {
            --tr7nn-primary: #4285F4;
            --tr7nn-secondary: #EA4335;
            --tr7nn-tertiary: #FBBC04;
            --tr7nn-quaternary: #34A853;
            --tr7nn-bg: #ffffff;
            --tr7nn-text: #202124;
            --tr7nn-gray: #5f6368;
            --tr7nn-light-gray: #f8f9fa;
            --tr7nn-border: #dadce0;
            --tr7nn-max-width: 1300px;
        }

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

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

        /* 导航系统 */
        .tr7nn-header {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--tr7nn-border);
        }

        .tr7nn-nav-container {
            max-width: var(--tr7nn-max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }

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

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

        .tr7nn-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 8px;
            min-width: 0;
        }

        .tr7nn-menu li {
            min-width: 0;
        }

        .tr7nn-menu a {
            text-decoration: none;
            color: var(--tr7nn-gray);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 4px;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .tr7nn-menu a:hover {
            background-color: var(--tr7nn-light-gray);
            color: var(--tr7nn-primary);
        }

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

        /* Hero 实验室布局 */
        .tr7nn-hero {
            padding: 120px 24px 64px;
            background: radial-gradient(circle at top right, rgba(66, 133, 244, 0.05), transparent),
                        radial-gradient(circle at bottom left, rgba(52, 168, 83, 0.05), transparent);
            text-align: center;
            position: relative;
        }

        .tr7nn-hero-inner {
            max-width: 900px;
            margin: 0 auto;
        }

        .tr7nn-hero-tag {
            display: inline-block;
            padding: 4px 12px;
            background: var(--tr7nn-light-gray);
            border: 1px solid var(--tr7nn-border);
            border-radius: 20px;
            font-size: 12px;
            font-weight: bold;
            color: var(--tr7nn-primary);
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .tr7nn-title {
            font-size: clamp(2rem, 5vw + 1rem, 4rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            color: var(--tr7nn-text);
            word-break: keep-all;
        }

        .tr7nn-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: var(--tr7nn-gray);
            max-width: 700px;
            margin: 0 auto 40px;
            line-height: 1.8;
        }

        /* 矩阵安全区块 */
        .tr7nn-section {
            padding: 64px 24px;
            max-width: var(--tr7nn-max-width);
            margin: 0 auto;
        }

        .tr7nn-matrix-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .tr7nn-card {
            background: #fff;
            border: 1px solid var(--tr7nn-border);
            border-radius: 16px;
            padding: 32px;
            transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .tr7nn-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
            border-color: var(--tr7nn-primary);
        }

        .tr7nn-card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            color: #fff;
        }

        .tr7nn-card-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .tr7nn-card-desc {
            font-size: 15px;
            color: var(--tr7nn-gray);
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .tr7nn-status-badge {
            font-size: 12px;
            padding: 4px 10px;
            border-radius: 4px;
            background: #e8f0fe;
            color: var(--tr7nn-primary);
            align-self: flex-start;
        }

        /* 动态内容区 */
        .tr7nn-dev-panel {
            background: #202124;
            border-radius: 24px;
            color: #fff;
            padding: 64px;
            margin-top: 64px;
            position: relative;
            overflow: hidden;
        }

        .tr7nn-dev-panel::before {
            content: "";
            position: absolute;
            top: 0; left: 0; right: 0; height: 4px;
            background: linear-gradient(90deg, var(--tr7nn-primary), var(--tr7nn-secondary), var(--tr7nn-tertiary), var(--tr7nn-quaternary));
        }

        .tr7nn-panel-content {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            align-items: center;
        }

        .tr7nn-panel-text {
            flex: 1;
            min-width: 300px;
        }

        .tr7nn-panel-visual {
            flex: 1;
            min-width: 300px;
            background: rgba(255,255,255,0.05);
            border-radius: 12px;
            padding: 24px;
            font-family: monospace;
            font-size: 14px;
            color: #81c995;
            border: 1px solid rgba(255,255,255,0.1);
        }

        /* 页脚 */
        .tr7nn-footer {
            background: var(--tr7nn-light-gray);
            padding: 64px 24px;
            border-top: 1px solid var(--tr7nn-border);
            margin-top: 96px;
        }

        .tr7nn-footer-container {
            max-width: var(--tr7nn-max-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
        }

        .tr7nn-footer-brand {
            font-size: 24px;
            font-weight: 700;
            color: var(--tr7nn-text);
            margin-bottom: 16px;
        }

        .tr7nn-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
        }

        .tr7nn-footer-column h4 {
            font-size: 14px;
            color: var(--tr7nn-text);
            margin-bottom: 20px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .tr7nn-footer-column ul {
            list-style: none;
        }

        .tr7nn-footer-column li {
            margin-bottom: 12px;
        }

        .tr7nn-footer-column a {
            color: var(--tr7nn-gray);
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }

        .tr7nn-footer-column a:hover {
            color: var(--tr7nn-primary);
        }

        .tr7nn-copyright {
            width: 100%;
            padding-top: 48px;
            margin-top: 48px;
            border-top: 1px solid var(--tr7nn-border);
            color: var(--tr7nn-gray);
            font-size: 13px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .tr7nn-nav-container {
                height: auto;
                padding: 16px;
            }
            .tr7nn-menu {
                width: 100%;
                justify-content: center;
                margin-top: 16px;
            }
            .tr7nn-hero {
                padding-top: 160px;
            }
            .tr7nn-dev-panel {
                padding: 32px;
            }
            .tr7nn-panel-visual {
                display: none;
            }
        }