:root {
            --rc1gu-primary: #D32F2F;
            --rc1gu-primary-light: #FFEBEE;
            --rc1gu-secondary: #1976D2;
            --rc1gu-dark: #212121;
            --rc1gu-gray: #757575;
            --rc1gu-bg: #FFFFFF;
            --rc1gu-bg-soft: #F8F9FA;
            --rc1gu-border: #EEEEEE;
            --rc1gu-container-width: 1400px;
            --rc1gu-shadow: 0 10px 30px rgba(0,0,0,0.05);
            --rc1gu-radius: 16px;
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
            color: var(--rc1gu-dark);
            line-height: 1.6;
            background-color: var(--rc1gu-bg);
            overflow-x: hidden;
            word-break: keep-all;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }

        ul {
            list-style: none;
        }

        /* 响应式排版 */
        h1 { font-size: clamp(2rem, 5vw, 3.5rem); line-height: 1.2; font-weight: 800; }
        h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); margin-bottom: 24px; }
        p { font-size: clamp(1rem, 1.5vw + 0.5rem, 1.125rem); line-height: 1.8; color: var(--rc1gu-gray); }

        .rc1gu-container {
            max-width: var(--rc1gu-container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航栏 */
        .rc1gu-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--rc1gu-border);
        }

        .rc1gu-nav {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            height: 80px;
            min-width: 0;
        }

        .rc1gu-logo {
            flex-shrink: 0;
            min-width: 0;
        }

        .rc1gu-logo img {
            height: 32px;
            display: block;
        }

        .rc1gu-menu {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            min-width: 0;
        }

        .rc1gu-menu-item a {
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 500;
            border-radius: 8px;
            color: var(--rc1gu-dark);
        }

        .rc1gu-menu-item a:hover {
            background: var(--rc1gu-primary-light);
            color: var(--rc1gu-primary);
        }

        .rc1gu-menu-item.active a {
            background: var(--rc1gu-primary);
            color: #fff;
        }

        /* Hero 区域 - 上下结构 */
        .rc1gu-hero {
            padding-top: 160px;
            padding-bottom: 80px;
            background: radial-gradient(circle at 50% 0%, #fff5f5 0%, #ffffff 70%);
            text-align: center;
        }

        .rc1gu-hero-content {
            max-width: 900px;
            margin: 0 auto;
            min-width: 0;
            word-break: break-word;
        }

        .rc1gu-badge {
            display: inline-block;
            padding: 6px 16px;
            background: var(--rc1gu-primary-light);
            color: var(--rc1gu-primary);
            border-radius: 50px;
            font-weight: 600;
            margin-bottom: 24px;
            letter-spacing: 1px;
        }

        .rc1gu-hero h1 {
            margin-bottom: 24px;
            color: #1a1a1a;
        }

        .rc1gu-hero-subtitle {
            margin-bottom: 48px;
            color: #666;
        }

        /* 搜索框 */
        .rc1gu-search-box {
            position: relative;
            max-width: 600px;
            margin: 0 auto;
            min-width: 0;
        }

        .rc1gu-search-input {
            width: 100%;
            padding: 20px 32px;
            border-radius: 50px;
            border: 2px solid var(--rc1gu-border);
            font-size: 18px;
            outline: none;
            transition: all 0.3s;
            box-shadow: var(--rc1gu-shadow);
        }

        .rc1gu-search-input:focus {
            border-color: var(--rc1gu-primary);
            box-shadow: 0 0 0 4px rgba(211, 47, 47, 0.1);
        }

        /* 快捷键仪表盘 */
        .rc1gu-shortcut-explorer {
            padding: 80px 0;
            background: var(--rc1gu-bg);
        }

        .rc1gu-explorer-tabs {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
            margin-bottom: 64px;
            min-width: 0;
        }

        .rc1gu-tab-btn {
            padding: 12px 32px;
            border-radius: 12px;
            background: var(--rc1gu-bg-soft);
            border: 1px solid var(--rc1gu-border);
            cursor: pointer;
            font-weight: 600;
            transition: all 0.3s;
        }

        .rc1gu-tab-btn.active {
            background: var(--rc1gu-dark);
            color: #fff;
            border-color: var(--rc1gu-dark);
        }

        .rc1gu-shortcut-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 24px;
            min-width: 0;
        }

        .rc1gu-card {
            background: #fff;
            padding: 32px;
            border-radius: var(--rc1gu-radius);
            border: 1px solid var(--rc1gu-border);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            position: relative;
            overflow: hidden;
            min-width: 0;
            word-break: break-word;
        }

        .rc1gu-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
            border-color: var(--rc1gu-primary-light);
        }

        .rc1gu-card-key {
            display: inline-flex;
            gap: 4px;
            margin-bottom: 16px;
        }

        .rc1gu-kbd {
            background: #f1f3f5;
            border: 1px solid #dee2e6;
            border-radius: 6px;
            box-shadow: 0 2px 0 #dee2e6;
            color: #495057;
            display: inline-block;
            font-size: 0.85em;
            font-weight: 700;
            line-height: 1;
            padding: 6px 10px;
            white-space: nowrap;
        }

        .rc1gu-card h3 {
            font-size: 1.25rem;
            margin-bottom: 12px;
            color: var(--rc1gu-dark);
        }

        .rc1gu-card p {
            font-size: 0.95rem;
            color: var(--rc1gu-gray);
        }

        /* 企业安全系统 - 独特深色背景 */
        .rc1gu-security {
            padding: 96px 0;
            background: #0f172a;
            color: #fff;
            border-radius: 40px;
            margin: 40px 24px;
        }

        .rc1gu-security-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 48px;
            min-width: 0;
        }

        .rc1gu-security-item {
            min-width: 0;
            word-break: break-word;
        }

        .rc1gu-security-tag {
            font-size: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--rc1gu-secondary);
            margin-bottom: 16px;
            display: block;
        }

        .rc1gu-security-item h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: #f8fafc;
        }

        .rc1gu-security-detail {
            font-size: 1rem;
            color: #94a3b8;
            margin-bottom: 20px;
            border-left: 3px solid var(--rc1gu-secondary);
            padding-left: 16px;
        }

        .rc1gu-security-impl {
            font-size: 0.9rem;
            color: #64748b;
            background: rgba(255,255,255,0.05);
            padding: 12px;
            border-radius: 8px;
        }

        /* 行业方案流程 - 视觉交替 */
        .rc1gu-industry {
            padding: 120px 0;
        }

        .rc1gu-industry-header {
            max-width: 800px;
            margin-bottom: 80px;
            min-width: 0;
        }

        .rc1gu-industry-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            margin-bottom: 96px;
            min-width: 0;
        }

        .rc1gu-industry-row:nth-child(even) {
            flex-direction: row-reverse;
        }

        .rc1gu-industry-content {
            flex: 1;
            min-width: 300px;
        }

        .rc1gu-industry-visual {
            flex: 1;
            min-width: 300px;
            background: var(--rc1gu-bg-soft);
            height: 300px;
            border-radius: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 5rem;
            position: relative;
            border: 1px solid var(--rc1gu-border);
        }

        .rc1gu-advantage-box {
            margin-top: 32px;
            padding: 24px;
            background: var(--rc1gu-primary-light);
            border-radius: 16px;
            color: var(--rc1gu-primary);
            font-weight: 600;
        }

        /* 页脚 */
        .rc1gu-footer {
            padding: 80px 0;
            background: var(--rc1gu-bg-soft);
            border-top: 1px solid var(--rc1gu-border);
        }

        .rc1gu-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            min-width: 0;
        }

        .rc1gu-footer-brand h2 {
            font-size: 1.5rem;
            color: var(--rc1gu-primary);
            margin-bottom: 16px;
        }

        .rc1gu-footer-links h4 {
            margin-bottom: 24px;
            font-size: 1.1rem;
        }

        .rc1gu-footer-links li {
            margin-bottom: 12px;
        }

        .rc1gu-footer-links a:hover {
            color: var(--rc1gu-primary);
        }

        .rc1gu-copyright {
            margin-top: 64px;
            padding-top: 32px;
            border-top: 1px solid var(--rc1gu-border);
            text-align: center;
            font-size: 0.9rem;
            color: var(--rc1gu-gray);
        }

        /* 移动端适配 */
        @media (max-width: 768px) {
            .rc1gu-nav {
                height: auto;
                padding: 16px 0;
            }
            .rc1gu-menu {
                width: 100%;
                justify-content: center;
                margin-top: 16px;
            }
            .rc1gu-hero {
                padding-top: 120px;
            }
            .rc1gu-security {
                margin: 20px 16px;
                border-radius: 20px;
                padding: 48px 24px;
            }
            .rc1gu-industry-row, .rc1gu-industry-row:nth-child(even) {
                flex-direction: column;
                gap: 32px;
            }
            .rc1gu-industry-visual {
                width: 100%;
            }
        }