:root {
            --tr7nn-primary: #4285F4;
            --tr7nn-danger: #EA4335;
            --tr7nn-warning: #FBBC04;
            --tr7nn-success: #34A853;
            --tr7nn-text: #202124;
            --tr7nn-text-light: #5F6368;
            --tr7nn-bg: #FFFFFF;
            --tr7nn-bg-alt: #F8F9FA;
            --tr7nn-glass: rgba(255, 255, 255, 0.85);
            --tr7nn-shadow: 0 4px 20px rgba(0,0,0,0.08);
            --tr7nn-radius: 16px;
        }

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

        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;
        }

        /* 导航栏样式 */
        .tr7nn-navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: var(--tr7nn-glass);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            padding: 0 24px;
        }

        .tr7nn-nav-container {
            max-width: 1400px;
            margin: 0 auto;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

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

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

        .tr7nn-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 12px;
            min-width: 0;
        }

        .tr7nn-nav-item a {
            text-decoration: none;
            color: var(--tr7nn-text-light);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 20px;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .tr7nn-nav-item a:hover {
            background: rgba(66, 133, 244, 0.08);
            color: var(--tr7nn-primary);
        }

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

        /* Hero 区域 - 独特对角线分割布局 */
        .tr7nn-hero {
            position: relative;
            padding: 160px 24px 100px;
            background: linear-gradient(135deg, #f1f5fe 0%, #ffffff 100%);
            overflow: hidden;
        }

        .tr7nn-hero-content {
            max-width: 1100px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .tr7nn-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            background: linear-gradient(to right, var(--tr7nn-primary), #1a73e8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            word-break: keep-all;
        }

        .tr7nn-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--tr7nn-text-light);
            max-width: 700px;
            margin: 0 auto 48px;
            line-height: 1.8;
        }

        /* 模拟主题视觉组件 */
        .tr7nn-hero-visual {
            display: flex;
            justify-content: center;
            gap: 24px;
            margin-top: 64px;
            perspective: 1000px;
            flex-wrap: wrap;
        }

        .tr7nn-theme-mockup {
            width: 300px;
            height: 180px;
            background: white;
            border-radius: 12px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            transform: rotateY(-15deg) rotateX(5deg);
            transition: transform 0.5s ease;
            overflow: hidden;
            position: relative;
            border: 1px solid rgba(0,0,0,0.05);
            min-width: 0;
        }

        .tr7nn-theme-mockup:hover {
            transform: rotateY(0) rotateX(0) translateY(-10px);
        }

        .tr7nn-mock-header {
            height: 30px;
            background: #eee;
            display: flex;
            align-items: center;
            padding: 0 10px;
            gap: 5px;
        }

        .tr7nn-mock-dot { width: 6px; height: 6px; border-radius: 50%; background: #ccc; }

        .tr7nn-mock-content {
            height: calc(100% - 30px);
            background: linear-gradient(45deg, var(--tr7nn-primary), var(--tr7nn-success));
            opacity: 0.8;
        }

        .tr7nn-mock-2 .tr7nn-mock-content { background: linear-gradient(45deg, var(--tr7nn-danger), var(--tr7nn-warning)); }
        .tr7nn-mock-3 .tr7nn-mock-content { background: linear-gradient(45deg, #8e2de2, #4a00e0); }

        /* 主题馆网格 */
        .tr7nn-section {
            padding: 96px 24px;
            max-width: 1400px;
            margin: 0 auto;
        }

        .tr7nn-section-header {
            margin-bottom: 64px;
            text-align: left;
            border-left: 6px solid var(--tr7nn-primary);
            padding-left: 24px;
        }

        .tr7nn-section-title {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            font-weight: 700;
            margin-bottom: 16px;
        }

        .tr7nn-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 32px;
        }

        .tr7nn-card {
            background: var(--tr7nn-bg);
            border-radius: var(--tr7nn-radius);
            overflow: hidden;
            transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
            border: 1px solid rgba(0,0,0,0.05);
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .tr7nn-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--tr7nn-shadow);
        }

        .tr7nn-card-preview {
            aspect-ratio: 16 / 9;
            background: var(--tr7nn-bg-alt);
            position: relative;
        }

        .tr7nn-card-body {
            padding: 24px;
        }

        .tr7nn-card-tag {
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            color: var(--tr7nn-primary);
            margin-bottom: 8px;
            display: block;
        }

        .tr7nn-card-title {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .tr7nn-card-desc {
            font-size: 14px;
            color: var(--tr7nn-text-light);
            margin-bottom: 20px;
        }

        /* 颜色渐变预览块 */
        .tr7nn-gradient-box {
            width: 100%;
            height: 100%;
            background-size: cover;
            background-position: center;
        }

        /* 安全矩阵区块 - 深色卡片风格 */
        .tr7nn-matrix-section {
            background: var(--tr7nn-text);
            color: white;
            border-radius: 40px;
            margin: 40px 24px;
            padding: 80px 48px;
        }

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

        .tr7nn-matrix-item {
            background: rgba(255,255,255,0.05);
            padding: 32px;
            border-radius: 24px;
            border: 1px solid rgba(255,255,255,0.1);
            min-width: 0;
        }

        .tr7nn-matrix-protocol {
            color: var(--tr7nn-primary);
            font-family: monospace;
            font-weight: bold;
            display: block;
            margin-bottom: 16px;
        }

        .tr7nn-matrix-func {
            font-size: 15px;
            opacity: 0.9;
            line-height: 1.7;
        }

        /* 页脚样式 */
        .tr7nn-footer {
            background: var(--tr7nn-bg-alt);
            padding: 80px 24px 40px;
            border-top: 1px solid rgba(0,0,0,0.05);
        }

        .tr7nn-footer-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
        }

        .tr7nn-footer-brand h2 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--tr7nn-text);
        }

        .tr7nn-footer-links {
            display: flex;
            gap: 64px;
            flex-wrap: wrap;
        }

        .tr7nn-footer-column h4 {
            margin-bottom: 24px;
            font-size: 16px;
            font-weight: 600;
        }

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

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

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

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

        .tr7nn-copyright {
            max-width: 1200px;
            margin: 64px auto 0;
            padding-top: 32px;
            border-top: 1px solid rgba(0,0,0,0.05);
            font-size: 13px;
            color: var(--tr7nn-text-light);
            text-align: center;
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .tr7nn-hero-title { font-size: 3.5rem; }
            .tr7nn-nav-menu { display: none; } /* 简化版：移动端隐藏菜单或改为汉堡包，此处为展示逻辑 */
        }

        @media (max-width: 768px) {
            .tr7nn-hero { padding: 120px 24px 60px; }
            .tr7nn-hero-visual { display: none; }
            .tr7nn-matrix-section { padding: 48px 24px; }
            .tr7nn-section { padding: 64px 24px; }
            .tr7nn-navbar { padding: 0 16px; }
            .tr7nn-nav-container { height: 64px; }
        }