/* 基础重置与全局变量 */
        :root {
            --rc1gu-primary: #d42b1f;
            --rc1gu-primary-dark: #b01f15;
            --rc1gu-secondary: #1e293b;
            --rc1gu-text: #0f172a;
            --rc1gu-text-light: #64748b;
            --rc1gu-bg: #ffffff;
            --rc1gu-bg-soft: #f8fafc;
            --rc1gu-accent: #3b82f6;
            --rc1gu-white: #ffffff;
            --rc1gu-radius: 16px;
            --rc1gu-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
            --rc1gu-container: 1360px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            color: var(--rc1gu-text);
            background-color: var(--rc1gu-bg);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: break-word;
        }

        /* 排版系统 */
        h1, h2, h3, h4 {
            line-height: 1.2;
            word-break: keep-all;
            white-space: normal;
        }

        h1 { font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem); font-weight: 800; }
        h2 { font-size: clamp(1.8rem, 3vw + 0.5rem, 2.8rem); font-weight: 700; }
        h3 { font-size: clamp(1.2rem, 2vw + 0.5rem, 1.8rem); font-weight: 600; }
        p { font-size: clamp(1rem, 0.5vw + 0.8rem, 1.125rem); line-height: 1.8; color: var(--rc1gu-text-light); }

        /* 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(12px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

        .rc1gu-nav-container {
            max-width: var(--rc1gu-container);
            margin: 0 auto;
            padding: 0 24px;
            height: 80px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

        .rc1gu-logo {
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .rc1gu-logo img {
            height: 36px;
            width: auto;
        }

        .rc1gu-nav-list {
            display: flex;
            list-style: none;
            gap: 8px;
            flex-wrap: wrap;
            min-width: 0;
        }

        .rc1gu-nav-item a {
            text-decoration: none;
            color: var(--rc1gu-secondary);
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 8px;
            transition: all 0.2s;
            font-size: 0.95rem;
        }

        .rc1gu-nav-item a:hover {
            color: var(--rc1gu-primary);
            background: rgba(212, 43, 31, 0.05);
        }

        .rc1gu-nav-item.rc1gu-active a {
            color: var(--rc1gu-primary);
            background: rgba(212, 43, 31, 0.08);
        }

        /* Hero下载区 - 独特双翼布局 */
        .rc1gu-hero {
            padding: 160px 24px 96px;
            background: radial-gradient(circle at top right, rgba(212, 43, 31, 0.05), transparent 40%),
                        radial-gradient(circle at bottom left, rgba(59, 130, 246, 0.05), transparent 40%);
            text-align: center;
        }

        .rc1gu-hero-content {
            max-width: 900px;
            margin: 0 auto 64px;
        }

        .rc1gu-hero-subtitle {
            margin: 24px auto 40px;
            max-width: 700px;
        }

        .rc1gu-download-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            max-width: var(--rc1gu-container);
            margin: 0 auto;
            justify-content: center;
        }

        .rc1gu-download-card {
            flex: 1;
            min-width: 320px;
            background: var(--rc1gu-white);
            border-radius: var(--rc1gu-radius);
            overflow: hidden;
            box-shadow: var(--rc1gu-shadow);
            transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            display: flex;
            flex-direction: column;
            border: 1px solid rgba(0,0,0,0.03);
        }

        .rc1gu-download-card:hover {
            transform: translateY(-10px);
        }

        .rc1gu-card-image {
            width: 100%;
            height: 240px;
            object-fit: cover;
        }

        .rc1gu-card-body {
            padding: 32px;
            text-align: left;
        }

        .rc1gu-card-title {
            margin-bottom: 12px;
            color: var(--rc1gu-secondary);
        }

        .rc1gu-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 28px;
            border-radius: 12px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s;
            cursor: pointer;
            border: none;
            font-size: 1rem;
        }

        .rc1gu-btn-primary {
            background: linear-gradient(135deg, var(--rc1gu-primary), var(--rc1gu-primary-dark));
            color: var(--rc1gu-white);
            width: 100%;
            margin-top: 24px;
        }

        .rc1gu-btn-primary:hover {
            box-shadow: 0 8px 20px rgba(212, 43, 31, 0.3);
            filter: brightness(1.1);
        }

        /* 企业安全 - 独特背景遮罩 */
        .rc1gu-security {
            padding: 96px 24px;
            background: var(--rc1gu-secondary);
            color: var(--rc1gu-white);
            position: relative;
            overflow: hidden;
        }

        .rc1gu-security-container {
            max-width: var(--rc1gu-container);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            align-items: center;
        }

        .rc1gu-security-info {
            flex: 1;
            min-width: 300px;
        }

        .rc1gu-security-list {
            flex: 1.5;
            min-width: 300px;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .rc1gu-security-item {
            background: rgba(255, 255, 255, 0.05);
            padding: 24px;
            border-radius: 12px;
            border-left: 4px solid var(--rc1gu-primary);
        }

        .rc1gu-security-item h4 {
            font-size: 1.25rem;
            margin-bottom: 8px;
            color: var(--rc1gu-white);
        }

        .rc1gu-security-item p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
            margin-bottom: 8px;
        }

        .rc1gu-security-tag {
            display: inline-block;
            font-size: 0.8rem;
            background: rgba(212, 43, 31, 0.2);
            color: var(--rc1gu-primary);
            padding: 2px 10px;
            border-radius: 4px;
            font-weight: 600;
        }

        /* 行业方案 - Bento Grid 布局 */
        .rc1gu-solutions {
            padding: 96px 24px;
            background: var(--rc1gu-bg-soft);
        }

        .rc1gu-section-header {
            max-width: 800px;
            margin: 0 auto 64px;
            text-align: center;
        }

        .rc1gu-bento-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
            gap: 24px;
            max-width: var(--rc1gu-container);
            margin: 0 auto;
        }

        .rc1gu-solution-card {
            background: var(--rc1gu-white);
            padding: 40px;
            border-radius: var(--rc1gu-radius);
            box-shadow: var(--rc1gu-shadow);
            border: 1px solid rgba(0,0,0,0.03);
            transition: all 0.3s ease;
        }

        .rc1gu-solution-card:hover {
            border-color: var(--rc1gu-primary);
        }

        .rc1gu-solution-icon {
            font-size: 2.5rem;
            margin-bottom: 24px;
            display: block;
        }

        .rc1gu-solution-card h3 {
            margin-bottom: 16px;
            color: var(--rc1gu-secondary);
        }

        .rc1gu-solution-workflow {
            font-size: 0.95rem;
            background: var(--rc1gu-bg-soft);
            padding: 16px;
            border-radius: 8px;
            margin-top: 20px;
            border-left: 3px solid var(--rc1gu-accent);
        }

        /* 移动端下载 */
        .rc1gu-mobile {
            padding: 96px 24px;
            background: var(--rc1gu-white);
        }

        .rc1gu-mobile-container {
            max-width: var(--rc1gu-container);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            align-items: center;
            background: linear-gradient(to right, #f1f5f9, #ffffff);
            border-radius: 32px;
            padding: 64px;
        }

        .rc1gu-mobile-image {
            flex: 1;
            min-width: 300px;
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
        }

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

        .rc1gu-qr-area {
            display: flex;
            align-items: center;
            gap: 24px;
            margin-top: 32px;
            flex-wrap: wrap;
        }

        .rc1gu-qr-placeholder {
            width: 140px;
            height: 140px;
            background: #fff;
            padding: 10px;
            border: 1px solid #e2e8f0;
            border-radius: 12px;
        }

        /* 页脚 */
        .rc1gu-footer {
            background: var(--rc1gu-secondary);
            color: var(--rc1gu-white);
            padding: 80px 24px 40px;
        }

        .rc1gu-footer-grid {
            max-width: var(--rc1gu-container);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            padding-bottom: 48px;
        }

        .rc1gu-footer-brand h2 {
            font-size: 1.5rem;
            margin-bottom: 16px;
        }

        .rc1gu-footer-links h4 {
            margin-bottom: 24px;
            font-size: 1.1rem;
            color: var(--rc1gu-white);
        }

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

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

        .rc1gu-footer-links a {
            color: rgba(255,255,255,0.6);
            text-decoration: none;
            transition: color 0.3s;
        }

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

        .rc1gu-footer-bottom {
            max-width: var(--rc1gu-container);
            margin: 40px auto 0;
            text-align: center;
            color: rgba(255,255,255,0.4);
            font-size: 0.9rem;
        }

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .rc1gu-mobile-container { padding: 32px; }
        }

        @media (max-width: 768px) {
            .rc1gu-nav-container { height: auto; padding: 16px; }
            .rc1gu-nav-list { display: none; width: 100%; margin-top: 16px; flex-direction: column; }
            .rc1gu-nav-list.rc1gu-show { display: flex; }
            .rc1gu-hero { padding-top: 120px; }
            .rc1gu-download-grid { flex-direction: column; }
            .rc1gu-download-card { min-width: 0; }
            .rc1gu-mobile-container { flex-direction: column-reverse; text-align: center; }
            .rc1gu-qr-area { justify-content: center; }
            .rc1gu-bento-grid { grid-template-columns: 1fr; }
        }

        /* 动画增强 */
        .rc1gu-fade-up {
            animation: rc1guFadeUp 0.8s ease-out forwards;
        }

        @keyframes rc1guFadeUp {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }