:root {
            --tr7nn-primary: #4285F4;
            --tr7nn-secondary: #EA4335;
            --tr7nn-tertiary: #FBBC04;
            --tr7nn-quaternary: #34A853;
            --tr7nn-bg: #ffffff;
            --tr7nn-text: #202124;
            --tr7nn-text-light: #5f6368;
            --tr7nn-max-width: 1140px;
            --tr7nn-ease: cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            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: keep-all;
        }

        /* 导航系统 */
        .tr7nn-navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.08);
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
        }

        .tr7nn-nav-container {
            width: 100%;
            max-width: var(--tr7nn-max-width);
            padding: 0 24px;
            height: 72px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
        }

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

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

        .tr7nn-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 16px;
            min-width: 0;
        }

        .tr7nn-nav-item {
            min-width: 0;
        }

        .tr7nn-nav-link {
            text-decoration: none;
            color: var(--tr7nn-text-light);
            font-size: clamp(0.85rem, 1vw + 0.2rem, 1rem);
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 4px;
            transition: all var(--tr7nn-ease);
            word-break: break-word;
        }

        .tr7nn-nav-link:hover {
            color: var(--tr7nn-primary);
            background: rgba(66, 133, 244, 0.05);
        }

        .tr7nn-nav-link.tr7nn-active {
            color: var(--tr7nn-primary);
            position: relative;
        }

        .tr7nn-nav-link.tr7nn-active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 12px;
            right: 12px;
            height: 3px;
            background: var(--tr7nn-primary);
            border-radius: 2px;
        }

        /* Hero 区 - 独特对角线布局 */
        .tr7nn-hero {
            padding: 160px 0 96px;
            background: linear-gradient(135deg, #f8f9fa 0%, #e8f0fe 100%);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
        }

        .tr7nn-hero::before {
            content: '';
            position: absolute;
            top: -20%;
            right: -10%;
            width: 60%;
            height: 140%;
            background: #fff;
            transform: rotate(-15deg);
            z-index: 1;
        }

        .tr7nn-hero-inner {
            width: 100%;
            max-width: var(--tr7nn-max-width);
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .tr7nn-hero-content {
            flex: 1 1 500px;
            min-width: 0;
            padding-right: 48px;
        }

        .tr7nn-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            color: var(--tr7nn-text);
            word-break: break-word;
        }

        .tr7nn-hero-subtitle {
            font-size: clamp(1.1rem, 2vw + 0.5rem, 1.4rem);
            color: var(--tr7nn-text-light);
            margin-bottom: 40px;
            max-width: 600px;
            line-height: 1.6;
        }

        .tr7nn-hero-visual {
            flex: 1 1 400px;
            min-width: 0;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .tr7nn-translate-mockup {
            background: #fff;
            border-radius: 24px;
            box-shadow: 0 40px 80px rgba(0,0,0,0.1);
            padding: 32px;
            width: 100%;
            max-width: 500px;
            border: 1px solid rgba(0,0,0,0.05);
            transform: perspective(1000px) rotateY(-10deg);
            transition: transform 0.5s var(--tr7nn-ease);
        }

        .tr7nn-translate-mockup:hover {
            transform: perspective(1000px) rotateY(0deg);
        }

        /* 功能区块 - 交错排版 */
        .tr7nn-section {
            padding: 96px 0;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
        }

        .tr7nn-container {
            width: 100%;
            max-width: var(--tr7nn-max-width);
            padding: 0 24px;
        }

        .tr7nn-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            width: 100%;
        }

        .tr7nn-feature-card {
            background: #fff;
            padding: 40px;
            border-radius: 20px;
            border: 1px solid #f1f3f4;
            transition: all 0.3s var(--tr7nn-ease);
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .tr7nn-feature-card:hover {
            box-shadow: 0 20px 40px rgba(0,0,0,0.06);
            transform: translateY(-8px);
        }

        .tr7nn-icon-box {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: bold;
            color: #fff;
        }

        /* 安全矩阵区块 */
        .tr7nn-matrix-section {
            background: #202124;
            color: #fff;
            padding: 96px 0;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
        }

        .tr7nn-matrix-header {
            text-align: center;
            margin-bottom: 64px;
            width: 100%;
        }

        .tr7nn-matrix-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
            width: 100%;
        }

        .tr7nn-matrix-item {
            background: rgba(255,255,255,0.05);
            padding: 32px;
            border-radius: 16px;
            border: 1px solid rgba(255,255,255,0.1);
            min-width: 0;
        }

        .tr7nn-matrix-protocol {
            color: var(--tr7nn-quaternary);
            font-family: monospace;
            font-size: 0.9rem;
            margin-bottom: 12px;
            display: block;
        }

        .tr7nn-matrix-status {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            background: rgba(52, 168, 83, 0.2);
            color: var(--tr7nn-quaternary);
            font-size: 0.8rem;
            margin-top: 16px;
        }

        /* 按钮设计 */
        .tr7nn-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 32px;
        }

        .tr7nn-btn {
            padding: 14px 32px;
            border-radius: 100px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s var(--tr7nn-ease);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 160px;
        }

        .tr7nn-btn-primary {
            background: var(--tr7nn-primary);
            color: #fff;
            box-shadow: 0 4px 15px rgba(66, 133, 244, 0.3);
        }

        .tr7nn-btn-primary:hover {
            background: #3367d6;
            box-shadow: 0 6px 20px rgba(66, 133, 244, 0.4);
            transform: scale(1.02);
        }

        .tr7nn-btn-outline {
            border: 2px solid var(--tr7nn-primary);
            color: var(--tr7nn-primary);
        }

        .tr7nn-btn-outline:hover {
            background: rgba(66, 133, 244, 0.05);
        }

        /* 页脚 */
        .tr7nn-footer {
            background: #f8f9fa;
            padding: 80px 0 40px;
            border-top: 1px solid #eee;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
        }

        .tr7nn-footer-brand {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--tr7nn-text);
            margin-bottom: 24px;
        }

        .tr7nn-footer-bottom {
            width: 100%;
            max-width: var(--tr7nn-max-width);
            padding: 40px 24px 0;
            margin-top: 40px;
            border-top: 1px solid rgba(0,0,0,0.05);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            color: var(--tr7nn-text-light);
            font-size: 0.9rem;
        }

        /* 响应式断点 */
        @media (max-width: 992px) {
            .tr7nn-hero-inner {
                flex-direction: column;
                text-align: center;
            }
            .tr7nn-hero-content {
                padding-right: 0;
                margin-bottom: 64px;
                order: 2;
            }
            .tr7nn-hero-visual {
                order: 1;
                margin-bottom: 48px;
            }
            .tr7nn-hero::before {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .tr7nn-nav-menu {
                display: none; /* 简化演示：移动端隐藏菜单，实际开发应使用汉堡菜单 */
            }
            .tr7nn-grid, .tr7nn-matrix-grid {
                grid-template-columns: 1fr;
            }
            .tr7nn-cta-group {
                justify-content: center;
            }
        }