:root {
            --rc1gu-primary: #D44333;
            --rc1gu-secondary: #1E2128;
            --rc1gu-accent: #4A90E2;
            --rc1gu-bg-light: #F8F9FB;
            --rc1gu-text-main: #2C3E50;
            --rc1gu-text-muted: #64748B;
            --rc1gu-white: #FFFFFF;
            --rc1gu-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --rc1gu-radius: 16px;
            --rc1gu-gap: 8px;
            --rc1gu-container-width: 1100px;
        }

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

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

        /* 布局规范 */
        .rc1gu-container {
            max-width: var(--rc1gu-container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .rc1gu-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .rc1gu-flex-item {
            min-width: 0;
        }

        /* 导航栏 */
        .rc1gu-header {
            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(0,0,0,0.05);
            padding: 16px 0;
        }

        .rc1gu-nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

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

        .rc1gu-nav-menu {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 16px;
        }

        .rc1gu-nav-link {
            text-decoration: none;
            color: var(--rc1gu-text-main);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 8px;
            transition: all 0.3s ease;
        }

        .rc1gu-nav-link:hover {
            color: var(--rc1gu-primary);
            background: rgba(212, 67, 51, 0.05);
        }

        .rc1gu-nav-link.active {
            color: var(--rc1gu-white);
            background: var(--rc1gu-primary);
        }

        /* Hero 区 - 对角线分割设计 */
        .rc1gu-hero {
            padding: 160px 0 96px;
            background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
            position: relative;
            overflow: hidden;
        }

        .rc1gu-hero-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 48px;
            align-items: center;
        }

        .rc1gu-hero-content {
            word-break: break-word;
        }

        .rc1gu-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            font-weight: 800;
            line-height: 1.2;
            color: var(--rc1gu-secondary);
            margin-bottom: 24px;
            white-space: normal;
        }

        .rc1gu-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--rc1gu-text-muted);
            margin-bottom: 40px;
            max-width: 600px;
        }

        /* 下载控制台卡片 */
        .rc1gu-download-console {
            background: var(--rc1gu-secondary);
            border-radius: var(--rc1gu-radius);
            padding: 32px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.2);
            color: var(--rc1gu-white);
            position: relative;
        }

        .rc1gu-console-header {
            border-bottom: 1px solid rgba(255,255,255,0.1);
            padding-bottom: 16px;
            margin-bottom: 24px;
        }

        .rc1gu-console-title {
            font-size: 18px;
            font-family: monospace;
            color: #10B981;
        }

        .rc1gu-download-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .rc1gu-download-btn {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 24px;
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: 12px;
            color: var(--rc1gu-white);
            text-decoration: none;
            transition: all 0.3s ease;
        }

        .rc1gu-download-btn:hover {
            background: var(--rc1gu-primary);
            transform: translateX(10px);
            border-color: var(--rc1gu-primary);
        }

        .rc1gu-btn-meta {
            font-size: 12px;
            opacity: 0.6;
        }

        /* 行业解决方案区块 - 侧向卡片流 */
        .rc1gu-section {
            padding: 96px 0;
            word-break: break-word;
        }

        .rc1gu-section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .rc1gu-section-title {
            font-size: clamp(1.5rem, 3vw, 2.5rem);
            margin-bottom: 16px;
        }

        .rc1gu-industry-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
        }

        .rc1gu-industry-card {
            background: var(--rc1gu-white);
            border: 1px solid #E2E8F0;
            border-radius: var(--rc1gu-radius);
            padding: 40px;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .rc1gu-industry-card:hover {
            box-shadow: var(--rc1gu-shadow);
            transform: translateY(-8px);
            border-color: var(--rc1gu-primary);
        }

        .rc1gu-industry-tag {
            display: inline-block;
            background: rgba(212, 67, 51, 0.1);
            color: var(--rc1gu-primary);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .rc1gu-industry-workflow {
            font-size: 15px;
            color: var(--rc1gu-text-muted);
            margin: 16px 0;
        }

        .rc1gu-industry-advantage {
            margin-top: auto;
            font-weight: 500;
            color: var(--rc1gu-secondary);
            padding-top: 16px;
            border-top: 1px dashed #E2E8F0;
        }

        /* 安全防护体系 - 深色全屏感 */
        .rc1gu-security-box {
            background: var(--rc1gu-secondary);
            color: var(--rc1gu-white);
            padding: 96px 0;
            border-radius: 40px;
            margin: 0 24px;
        }

        .rc1gu-security-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            justify-content: center;
        }

        .rc1gu-security-item {
            flex: 1;
            min-width: 280px;
            background: rgba(255,255,255,0.03);
            padding: 32px;
            border-radius: 20px;
            border-left: 4px solid var(--rc1gu-primary);
        }

        .rc1gu-security-level {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--rc1gu-primary);
        }

        .rc1gu-security-detail {
            font-size: 14px;
            opacity: 0.8;
            margin-bottom: 16px;
        }

        .rc1gu-security-impl {
            font-size: 13px;
            background: rgba(255,255,255,0.05);
            padding: 12px;
            border-radius: 8px;
            font-family: monospace;
        }

        /* 动态内容区块 */
        .rc1gu-update-log {
            background: var(--rc1gu-bg-light);
            border-radius: var(--rc1gu-radius);
            padding: 48px;
        }

        /* 页脚 */
        .rc1gu-footer {
            padding: 80px 0 40px;
            background: var(--rc1gu-white);
            border-top: 1px solid #EEE;
        }

        .rc1gu-footer-content {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            flex-wrap: wrap;
            gap: 48px;
        }

        .rc1gu-footer-brand {
            font-size: 24px;
            font-weight: 800;
            color: var(--rc1gu-secondary);
        }

        .rc1gu-footer-links {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px;
        }

        .rc1gu-footer-col h4 {
            margin-bottom: 20px;
            font-size: 16px;
        }

        .rc1gu-footer-col ul {
            list-style: none;
        }

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

        .rc1gu-footer-col a {
            text-decoration: none;
            color: var(--rc1gu-text-muted);
            font-size: 14px;
            transition: color 0.3s;
        }

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

        .rc1gu-copyright {
            margin-top: 64px;
            padding-top: 24px;
            border-top: 1px solid #EEE;
            text-align: center;
            font-size: 13px;
            color: var(--rc1gu-text-muted);
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            :root {
                --rc1gu-container-width: 100%;
            }
            .rc1gu-nav-menu {
                display: none; /* 简化移动端，实际开发中可添加汉堡菜单 */
            }
            .rc1gu-hero {
                padding-top: 120px;
            }
            .rc1gu-security-box {
                margin: 0 12px;
                padding: 48px 20px;
            }
            .rc1gu-industry-card {
                padding: 24px;
            }
        }