/* 核心变量与风格定义 */
        :root {
            --r6tl-primary: #FF6C37; /* Postman Orange */
            --r6tl-primary-dark: #E05A2B;
            --r6tl-secondary: #00F2FE; /* Accent Color */
            --r6tl-dark: #212121;
            --r6tl-gray: #6B6B6B;
            --r6tl-light: #F9F9F9;
            --r6tl-white: #FFFFFF;
            --r6tl-error: #FF3B30;
            --r6tl-success: #34C759;
            --r6tl-spacing-unit: 8px;
            --r6tl-radius: 16px;
            --r6tl-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --r6tl-container-width: 1300px;
        }

        /* 全局复位 */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            color: var(--r6tl-dark);
            background-color: var(--r6tl-white);
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 基础原子类 */
        .r6tl-flex { display: flex; flex-wrap: wrap; }
        .r6tl-grid { display: grid; }
        .r6tl-container { 
            max-width: var(--r6tl-container-width); 
            margin: 0 auto; 
            padding: 0 calc(var(--r6tl-spacing-unit) * 3);
            width: 100%;
        }
        .r6tl-section { padding: 96px 0; overflow: hidden; }

        /* 流体字体 */
        h1 { font-size: clamp(2.5rem, 5vw + 1rem, 4rem); line-height: 1.1; margin-bottom: 24px; font-weight: 800; }
        h2 { font-size: clamp(1.8rem, 3vw + 0.5rem, 2.5rem); margin-bottom: 32px; font-weight: 700; color: var(--r6tl-dark); }
        h3 { font-size: clamp(1.2rem, 2vw + 0.2rem, 1.5rem); margin-bottom: 16px; font-weight: 600; }
        p { font-size: 1.125rem; line-height: 1.8; color: var(--r6tl-gray); margin-bottom: 16px; word-break: break-word; }

        /* 导航栏设计 - 侧边与顶部的创意融合 */
        .r6tl-navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(15px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            display: flex;
            align-items: center;
            transition: all 0.3s ease;
        }

        .r6tl-nav-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            flex-wrap: nowrap; /* 导航主轴不换行 */
        }

        .r6tl-logo {
            flex-shrink: 0;
            margin-right: 48px;
        }
        .r6tl-logo img {
            height: 40px;
            width: auto;
            display: block;
        }

        .r6tl-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 20px;
            min-width: 0;
        }

        .r6tl-menu-item a {
            text-decoration: none;
            color: var(--r6tl-dark);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 8px;
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .r6tl-menu-item a:hover {
            color: var(--r6tl-primary);
            background: rgba(255, 108, 55, 0.05);
        }

        .r6tl-menu-item a.r6tl-active {
            color: var(--r6tl-primary);
            font-weight: 700;
            background: rgba(255, 108, 55, 0.1);
        }

        /* 响应式导航开关 */
        .r6tl-nav-toggle { display: none; }

        /* Hero 区 - 诊断中心视觉布局 */
        .r6tl-hero {
            background: linear-gradient(135deg, #FFF5F2 0%, #FFFFFF 100%);
            padding-top: 160px;
            padding-bottom: 80px;
            position: relative;
        }

        .r6tl-hero-layout {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .r6tl-hero-text {
            flex: 1;
            min-width: 320px;
        }

        .r6tl-hero-visual {
            flex: 1;
            min-width: 320px;
            position: relative;
        }

        .r6tl-status-card {
            background: var(--r6tl-white);
            border-radius: var(--r6tl-radius);
            padding: 32px;
            box-shadow: 20px 20px 60px rgba(0,0,0,0.05);
            border: 1px solid rgba(255, 108, 55, 0.1);
            position: relative;
            z-index: 2;
        }

        .r6tl-status-item {
            display: flex;
            align-items: center;
            padding: 16px 0;
            border-bottom: 1px solid #F0F0F0;
        }

        .r6tl-status-item:last-child { border-bottom: none; }

        .r6tl-status-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            margin-right: 16px;
            background: var(--r6tl-error);
            box-shadow: 0 0 10px var(--r6tl-error);
        }

        .r6tl-status-dot.r6tl-online {
            background: var(--r6tl-success);
            box-shadow: 0 0 10px var(--r6tl-success);
        }

        .r6tl-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 108, 55, 0.1);
            color: var(--r6tl-primary);
            border-radius: 30px;
            font-weight: 700;
            font-size: 0.85rem;
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        /* 解决方案矩阵 - Grid 布局 */
        .r6tl-matrix-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .r6tl-matrix-card {
            background: var(--r6tl-white);
            padding: 40px;
            border-radius: var(--r6tl-radius);
            border: 1px solid #EEE;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            min-width: 0;
        }

        .r6tl-matrix-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--r6tl-shadow);
            border-color: var(--r6tl-primary);
        }

        .r6tl-card-icon {
            width: 64px;
            height: 64px;
            background: var(--r6tl-light);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            font-size: 24px;
            color: var(--r6tl-primary);
        }

        /* 深度排查步骤 - 图文并茂 */
        .r6tl-step-section {
            background: var(--r6tl-dark);
            color: var(--r6tl-white);
        }

        .r6tl-step-section h2 { color: var(--r6tl-white); }
        .r6tl-step-section p { color: #AAA; }

        .r6tl-step-row {
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            align-items: center;
            margin-bottom: 96px;
        }

        .r6tl-step-row:nth-child(even) { flex-direction: row-reverse; }

        .r6tl-step-content { flex: 1; min-width: 320px; }
        .r6tl-step-image { 
            flex: 1; 
            min-width: 320px; 
            background: rgba(255,255,255,0.05);
            border-radius: var(--r6tl-radius);
            padding: 40px;
            border: 1px dashed rgba(255,255,255,0.1);
        }

        .r6tl-code-block {
            background: #111;
            padding: 24px;
            border-radius: 8px;
            font-family: 'Courier New', Courier, monospace;
            font-size: 0.9rem;
            color: var(--r6tl-secondary);
            margin-top: 24px;
            border-left: 4px solid var(--r6tl-primary);
        }

        /* 统计区块 */
        .r6tl-stats-bar {
            background: var(--r6tl-primary);
            padding: 48px 0;
            color: var(--r6tl-white);
        }

        .r6tl-stats-container {
            display: flex;
            justify-content: space-around;
            text-align: center;
            flex-wrap: wrap;
            gap: 32px;
        }

        .r6tl-stat-item { flex: 1; min-width: 150px; }
        .r6tl-stat-value { font-size: 3rem; font-weight: 800; display: block; }
        .r6tl-stat-label { font-size: 1rem; opacity: 0.8; }

        /* 动态内容区 */
        .r6tl-dynamic-news {
            background: var(--r6tl-light);
        }

        .r6tl-news-card {
            background: var(--r6tl-white);
            padding: 24px;
            border-radius: 12px;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 24px;
            transition: background 0.3s;
        }

        .r6tl-news-card:hover { background: #FFF9F7; }

        .r6tl-news-date {
            background: #EEE;
            padding: 8px 12px;
            border-radius: 8px;
            font-size: 0.8rem;
            font-weight: 700;
        }

        /* 页脚设计 */
        .r6tl-footer {
            background: var(--r6tl-dark);
            color: var(--r6tl-white);
            padding: 80px 0 40px;
        }

        .r6tl-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .r6tl-footer-brand h4 {
            font-size: 1.5rem;
            margin-bottom: 24px;
            color: var(--r6tl-primary);
        }

        .r6tl-footer-links h5 {
            margin-bottom: 24px;
            font-size: 1.1rem;
            position: relative;
        }

        .r6tl-footer-links h5::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 30px;
            height: 2px;
            background: var(--r6tl-primary);
        }

        .r6tl-footer-links ul { list-style: none; }
        .r6tl-footer-links li { margin-bottom: 12px; }
        .r6tl-footer-links a {
            color: #999;
            text-decoration: none;
            transition: color 0.3s;
        }
        .r6tl-footer-links a:hover { color: var(--r6tl-white); }

        .r6tl-footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.05);
            padding-top: 40px;
            text-align: center;
            color: #666;
            font-size: 0.9rem;
        }

        /* 交互按钮 */
        .r6tl-btn {
            display: inline-flex;
            align-items: center;
            padding: 16px 32px;
            border-radius: 50px;
            font-weight: 700;
            text-decoration: none;
            transition: all 0.3s;
            cursor: pointer;
            border: none;
        }

        .r6tl-btn-primary {
            background: var(--r6tl-primary);
            color: var(--r6tl-white);
            box-shadow: 0 10px 20px rgba(255, 108, 55, 0.3);
        }

        .r6tl-btn-primary:hover {
            background: var(--r6tl-primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(255, 108, 55, 0.4);
        }

        .r6tl-btn-outline {
            border: 2px solid var(--r6tl-primary);
            color: var(--r6tl-primary);
            margin-left: 16px;
        }

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .r6tl-menu { display: none; }
            .r6tl-nav-toggle { 
                display: block; 
                font-size: 24px; 
                cursor: pointer;
                color: var(--r6tl-primary);
            }
            .r6tl-hero-text, .r6tl-hero-visual { flex: 0 0 100%; text-align: center; }
            .r6tl-hero-layout { justify-content: center; }
            .r6tl-status-card { max-width: 500px; margin: 0 auto; }
            .r6tl-btn-outline { margin: 16px 0 0 0; display: flex; justify-content: center; }
        }

        @media (max-width: 768px) {
            .r6tl-section { padding: 64px 0; }
            .r6tl-step-row, .r6tl-step-row:nth-child(even) { flex-direction: column; }
            .r6tl-stat-item { flex: 0 0 50%; }
        }